Fix HiDPI issues on secondary screen

Reset the renderer and texture on display scaling change.

FIXME problem with texture (see FIXME in code)

Co-authored-by: Louis Kruger <louisk@gmail.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,25 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+ - [ ] I have read the [FAQ](https://github.com/Genymobile/scrcpy/blob/master/FAQ.md).
+ - [ ] I have searched in existing [issues](https://github.com/Genymobile/scrcpy/issues).
+
+**Environment**
+ - OS: [e.g. Debian, Windows, macOS...]
+ - scrcpy version: [e.g. 1.12.1]
+ - installation method: [e.g. manual build, apt, snap, brew, Windows release...]
+ - device model:
+ - Android version: [e.g. 10]
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+On errors, please provide the output of the console (and `adb logcat` if relevant).
+Format them between code blocks (delimited by ```).
+Please do not post screenshots of your terminal, just post the content as text instead.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,22 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+ - [ ] I have checked that a similar [feature request](https://github.com/Genymobile/scrcpy/issues?q=is%3Aopen+is%3Aissue+label%3A%22feature+request%22) does not already exist.
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.gitignore

@@ -2,3 +2,4 @@ build/
 /dist/
 .idea/
 .gradle/
+/x/

BUILD.md

@@ -8,6 +8,22 @@ case, use the [prebuilt server] (so you will not need Java or the Android SDK).
 
 [prebuilt server]: #prebuilt-server
 
+## Branches
+
+### `master`
+
+The `master` branch concerns the latest release, and is the home page of the
+project on Github.
+
+
+### `dev`
+
+`dev` is the current development branch. Every commit present in `dev` will be
+in the next release.
+
+If you want to contribute code, please base your commits on the latest `dev`
+branch.
+
 
 ## Requirements
 
@@ -247,3 +263,6 @@ meson x --buildtype release --strip -Db_lto=true \
 ninja -Cx
 sudo ninja -Cx install
 ```
+
+The server only works with a matching client version (this server works with the
+`master` branch).

DEVELOP.md

@@ -282,6 +282,15 @@ meson x -Dserver_debugger=true
 meson configure x -Dserver_debugger=true
 ```
 
+If your device runs Android 8 or below, set the `server_debugger_method` to
+`old` in addition:
+
+```bash
+meson x -Dserver_debugger=true -Dserver_debugger_method=old
+# or, if x is already configured
+meson configure x -Dserver_debugger=true -Dserver_debugger_method=old
+```
+
 Then recompile.
 
 When you start scrcpy, it will start a debugger on port 5005 on the device.

FAQ.md

@@ -132,19 +132,29 @@ that's all. See [#37].
 
 ## Client issues
 
-### The quality is low on HiDPI display
+### The quality is low
 
-On Windows, you may need to configure the [scaling behavior].
+If the definition of your client window is smaller than that of your device
+screen, then you might get poor quality, especially visible on text (see [#40]).
+
+[#40]: https://github.com/Genymobile/scrcpy/issues/40
+
+To improve downscaling quality, trilinear filtering is enabled automatically
+if the renderer is OpenGL and if it supports mipmapping.
+
+On Windows, you might want to force OpenGL:
+
+```
+scrcpy --render-driver=opengl
+```
+
+You may also need to configure the [scaling behavior]:
 
 > `scrcpy.exe` > Properties > Compatibility > Change high DPI settings >
 > Override high DPI scaling behavior > Scaling performed by: _Application_.
 
 [scaling behavior]: https://github.com/Genymobile/scrcpy/issues/40#issuecomment-424466723
 
-If your computer definition is far smaller than your screen, then you'll get
-poor quality. See [#40].
-
-[#40]: https://github.com/Genymobile/scrcpy/issues/40
 
 
 ### KWin compositor crashes

README.md

@@ -159,12 +159,14 @@ scrcpy -b 2M  # short version
 
 #### Limit frame rate
 
-On devices with Android >= 10, the capture frame rate can be limited:
+The capture frame rate can be limited:
 
 ```bash
 scrcpy --max-fps 15
 ```
 
+This is officially supported since Android 10, but may work on earlier versions.
+
 #### Crop
 
 The device screen may be cropped to mirror only part of the screen.
@@ -178,6 +180,21 @@ scrcpy --crop 1224:1440:0:0   # 1224x1440 at offset (0,0)
 If `--max-size` is also specified, resizing is applied after cropping.
 
 
+#### Lock video orientation
+
+
+To lock the orientation of the mirroring:
+
+```bash
+scrcpy --lock-video-orientation 0   # natural orientation
+scrcpy --lock-video-orientation 1   # 90° counterclockwise
+scrcpy --lock-video-orientation 2   # 180°
+scrcpy --lock-video-orientation 3   # 90° clockwise
+```
+
+This affects recording orientation.
+
+
 ### Recording
 
 It is possible to record the screen while mirroring:
@@ -245,6 +262,16 @@ scrcpy -s 192.168.0.1:5555  # short version
 
 You can start several instances of _scrcpy_ for several devices.
 
+#### Autostart on device connection
+
+You could use [AutoAdb]:
+
+```bash
+autoadb scrcpy -s '{}'
+```
+
+[AutoAdb]: https://github.com/rom1v/usbaudio
+
 #### SSH tunnel
 
 To connect to a remote device, it is possible to connect a local `adb` client to
@@ -314,6 +341,33 @@ scrcpy -f  # short version
 
 Fullscreen can then be toggled dynamically with `Ctrl`+`f`.
 
+#### Rotation
+
+The window may be rotated:
+
+```bash
+scrcpy --rotation 1
+```
+
+Possibles values are:
+ - `0`: no rotation
+ - `1`: 90 degrees counterclockwise
+ - `2`: 180 degrees
+ - `3`: 90 degrees clockwise
+
+The rotation can also be changed dynamically with `Ctrl`+`←` _(left)_ and
+`Ctrl`+`→` _(right)_.
+
+Note that _scrcpy_ manages 3 different rotations:
+ - `Ctrl`+`r` requests the device to switch between portrait and landscape (the
+   current running app may refuse, if it does support the requested
+   orientation).
+ - `--lock-video-orientation` changes the mirroring orientation (the orientation
+   of the video sent from the device to the computer). This affects the
+   recording.
+ - `--rotation` (or `Ctrl`+`←`/`Ctrl`+`→`) rotates only the window content. This
+   affects only the display, not the recording.
+
 
 ### Other mirroring options
 
@@ -327,6 +381,21 @@ scrcpy --no-control
 scrcpy -n
 ```
 
+#### Display
+
+If several displays are available, it is possible to select the display to
+mirror:
+
+```bash
+scrcpy --display 1
+```
+
+The list of display ids can be retrieved by:
+
+```
+adb shell dumpsys display   # search "mDisplayId=" in the output
+```
+
 #### Turn screen off
 
 It is possible to turn the device screen off while mirroring on start with a
@@ -450,6 +519,8 @@ Also see [issue #14].
  | Action                                 |   Shortcut                    |   Shortcut (macOS)
  | -------------------------------------- |:----------------------------- |:-----------------------------
  | Switch fullscreen mode                 | `Ctrl`+`f`                    | `Cmd`+`f`
+ | Rotate display left                    | `Ctrl`+`←` _(left)_           | `Cmd`+`←` _(left)_
+ | Rotate display right                   | `Ctrl`+`→` _(right)_          | `Cmd`+`→` _(right)_
  | Resize window to 1:1 (pixel-perfect)   | `Ctrl`+`g`                    | `Cmd`+`g`
  | Resize window to remove black borders  | `Ctrl`+`x` \| _Double-click¹_ | `Cmd`+`x`  \| _Double-click¹_
  | Click on `HOME`                        | `Ctrl`+`h` \| _Middle-click_  | `Ctrl`+`h` \| _Middle-click_

app/meson.build

@@ -11,6 +11,7 @@ src = [
     'src/file_handler.c',
     'src/fps_counter.c',
     'src/input_manager.c',
+    'src/opengl.c',
     'src/receiver.c',
     'src/recorder.c',
     'src/scrcpy.c',
@@ -76,11 +77,9 @@ cc = meson.get_compiler('c')
 
 if host_machine.system() == 'windows'
     src += [ 'src/sys/win/command.c' ]
-    src += [ 'src/sys/win/net.c' ]
     dependencies += cc.find_library('ws2_32')
 else
     src += [ 'src/sys/unix/command.c' ]
-    src += [ 'src/sys/unix/net.c' ]
 endif
 
 conf = configuration_data()
@@ -98,27 +97,34 @@ conf.set_quoted('PREFIX', get_option('prefix'))
 # directory as the executable)
 conf.set('PORTABLE', get_option('portable'))
 
-# the default client TCP port for the "adb reverse" tunnel
+# the default client TCP port range for the "adb reverse" tunnel
 # overridden by option --port
-conf.set('DEFAULT_LOCAL_PORT', '27183')
+conf.set('DEFAULT_LOCAL_PORT_RANGE_FIRST', '27183')
+conf.set('DEFAULT_LOCAL_PORT_RANGE_LAST', '27199')
 
 # the default max video size for both dimensions, in pixels
 # overridden by option --max-size
 conf.set('DEFAULT_MAX_SIZE', '0')  # 0: unlimited
 
+# the default video orientation
+# natural device orientation is 0 and each increment adds 90 degrees
+# counterclockwise
+# overridden by option --lock-video-orientation
+conf.set('DEFAULT_LOCK_VIDEO_ORIENTATION', '-1')  # -1: unlocked
+
 # the default video bitrate, in bits/second
 # overridden by option --bit-rate
 conf.set('DEFAULT_BIT_RATE', '8000000')  # 8Mbps
 
-# enable High DPI support
-conf.set('HIDPI_SUPPORT', get_option('hidpi_support'))
-
 # disable console on Windows
 conf.set('WINDOWS_NOCONSOLE', get_option('windows_noconsole'))
 
 # run a server debugger and wait for a client to be attached
 conf.set('SERVER_DEBUGGER', get_option('server_debugger'))
 
+# select the debugger method ('old' for Android < 9, 'new' for Android >= 9)
+conf.set('SERVER_DEBUGGER_METHOD_NEW', get_option('server_debugger_method') == 'new')
+
 configure_file(configuration: conf, output: 'config.h')
 
 src_dir = include_directories('src')

app/scrcpy.1

@@ -33,6 +33,15 @@ The values are expressed in the device natural orientation (typically, portrait
 .B \-\-max\-size
 value is computed on the cropped size.
 
+.TP
+.BI "\-\-display " id
+Specify the display id to mirror.
+
+The list of possible display ids can be listed by "adb shell dumpsys display"
+(search "mDisplayId=" in the output).
+
+Default is 0.
+
 .TP
 .B \-f, \-\-fullscreen
 Start in fullscreen.
@@ -41,9 +50,15 @@ Start in fullscreen.
 .B \-h, \-\-help
 Print this help.
 
+.TP
+.BI "\-\-lock\-video\-orientation " value
+Lock video orientation to \fIvalue\fR. Possible values are -1 (unlocked), 0, 1, 2 and 3. Natural device orientation is 0, and each increment adds a 90 degrees otation counterclockwise.
+
+Default is -1 (unlocked).
+
 .TP
 .BI "\-\-max\-fps " value
-Limit the framerate of screen capture (only supported on devices with Android >= 10).
+Limit the framerate of screen capture (officially supported since Android 10, but may work on earlier versions).
 
 .TP
 .BI "\-m, \-\-max\-size " value
@@ -60,10 +75,14 @@ Disable device control (mirror the device in read\-only).
 Do not display device (only when screen recording is enabled).
 
 .TP
-.BI "\-p, \-\-port " port
-Set the TCP port the client listens on.
+.B \-\-no\-mipmaps
+If the renderer is OpenGL 3.0+ or OpenGL ES 2.0+, then mipmaps are automatically generated to improve downscaling quality. This option disables the generation of mipmaps.
 
-Default is 27183.
+.TP
+.BI "\-p, \-\-port " port[:port]
+Set the TCP port (range) used by the client to listen.
+
+Default is 27183:27199.
 
 .TP
 .B \-\-prefer\-text
@@ -91,10 +110,22 @@ option if set, or by the file extension (.mp4 or .mkv).
 .BI "\-\-record\-format " format
 Force recording format (either mp4 or mkv).
 
+.TP
+.BI "\-\-render\-driver " name
+Request SDL to use the given render driver (this is just a hint).
+
+Supported names are currently "direct3d", "opengl", "opengles2", "opengles", "metal" and "software".
+.UR https://wiki.libsdl.org/SDL_HINT_RENDER_DRIVER
+.UE
+
 .TP
 .B \-\-render\-expired\-frames
 By default, to minimize latency, scrcpy always renders the last available decoded frame, and drops any previous ones. This flag forces to render all frames, at a cost of a possible increased latency.
 
+.TP
+.BI "\-\-rotation " value
+Set the initial display rotation. Possibles values are 0, 1, 2 and 3. Each increment adds a 90 degrees rotation counterclockwise.
+
 .TP
 .BI "\-s, \-\-serial " number
 The device serial number. Mandatory only if several devices are connected to adb.
@@ -125,13 +156,13 @@ Set a custom window title.
 .BI "\-\-window\-x " value
 Set the initial window horizontal position.
 
-Default is -1 (automatic).\n
+Default is "auto".\n
 
 .TP
 .BI "\-\-window\-y " value
 Set the initial window vertical position.
 
-Default is -1 (automatic).\n
+Default is "auto".\n
 
 .TP
 .BI "\-\-window\-width " value
@@ -149,15 +180,23 @@ Default is 0 (automatic).\n
 
 .TP
 .B Ctrl+f
-switch fullscreen mode
+Switch fullscreen mode
+
+.TP
+.B Ctrl+Left
+Rotate display left
+
+.TP
+.B Ctrl+Right
+Rotate display right
 
 .TP
 .B Ctrl+g
-resize window to 1:1 (pixel\-perfect)
+Resize window to 1:1 (pixel\-perfect)
 
 .TP
 .B Ctrl+x, Double\-click on black borders
-resize window to remove black borders
+Resize window to remove black borders
 
 .TP
 .B Ctrl+h, Home, Middle\-click
@@ -189,43 +228,43 @@ Click on POWER (turn screen on/off)
 
 .TP
 .B Right\-click (when screen is off)
-turn screen on
+Turn screen on
 
 .TP
 .B Ctrl+o
-turn device screen off (keep mirroring)
+Turn device screen off (keep mirroring)
 
 .TP
 .B Ctrl+r
-rotate device screen
+Rotate device screen
 
 .TP
 .B Ctrl+n
-expand notification panel
+Expand notification panel
 
 .TP
 .B Ctrl+Shift+n
-collapse notification panel
+Collapse notification panel
 
 .TP
 .B Ctrl+c
-copy device clipboard to computer
+Copy device clipboard to computer
 
 .TP
 .B Ctrl+v
-paste computer clipboard to device
+Paste computer clipboard to device
 
 .TP
 .B Ctrl+Shift+v
-copy computer clipboard to device
+Copy computer clipboard to device
 
 .TP
 .B Ctrl+i
-enable/disable FPS counter (print frames/second in logs)
+Enable/disable FPS counter (print frames/second in logs)
 
 .TP
 .B Drag & drop APK file
-install APK from computer
+Install APK from computer
 
 
 .SH Environment variables

app/src/cli.c

@@ -1,5 +1,6 @@
 #include "cli.h"
 
+#include <assert.h>
 #include <getopt.h>
 #include <stdint.h>
 #include <unistd.h>
@@ -35,15 +36,31 @@ scrcpy_print_usage(const char *arg0) {
         "        (typically, portrait for a phone, landscape for a tablet).\n"
         "        Any --max-size value is computed on the cropped size.\n"
         "\n"
+        "    --display id\n"
+        "        Specify the display id to mirror.\n"
+        "\n"
+        "        The list of possible display ids can be listed by:\n"
+        "            adb shell dumpsys display\n"
+        "        (search \"mDisplayId=\" in the output)\n"
+        "\n"
+        "        Default is 0.\n"
+        "\n"
         "    -f, --fullscreen\n"
         "        Start in fullscreen.\n"
         "\n"
         "    -h, --help\n"
         "        Print this help.\n"
         "\n"
+        "    --lock-video-orientation value\n"
+        "        Lock video orientation to value.\n"
+        "        Possible values are -1 (unlocked), 0, 1, 2 and 3.\n"
+        "        Natural device orientation is 0, and each increment adds a\n"
+        "        90 degrees rotation counterclockwise.\n"
+        "        Default is %d%s.\n"
+        "\n"
         "    --max-fps value\n"
-        "        Limit the frame rate of screen capture (only supported on\n"
-        "        devices with Android >= 10).\n"
+        "        Limit the frame rate of screen capture (officially supported\n"
+        "        since Android 10, but may work on earlier versions).\n"
         "\n"
         "    -m, --max-size value\n"
         "        Limit both the width and height of the video to value. The\n"
@@ -58,9 +75,14 @@ scrcpy_print_usage(const char *arg0) {
         "        Do not display device (only when screen recording is\n"
         "        enabled).\n"
         "\n"
-        "    -p, --port port\n"
-        "        Set the TCP port the client listens on.\n"
-        "        Default is %d.\n"
+        "    --no-mipmaps\n"
+        "        If the renderer is OpenGL 3.0+ or OpenGL ES 2.0+, then\n"
+        "        mipmaps are automatically generated to improve downscaling\n"
+        "        quality. This option disables the generation of mipmaps.\n"
+        "\n"
+        "    -p, --port port[:port]\n"
+        "        Set the TCP port (range) used by the client to listen.\n"
+        "        Default is %d:%d.\n"
         "\n"
         "    --prefer-text\n"
         "        Inject alpha characters and space as text events instead of\n"
@@ -82,12 +104,24 @@ scrcpy_print_usage(const char *arg0) {
         "    --record-format format\n"
         "        Force recording format (either mp4 or mkv).\n"
         "\n"
+        "    --render-driver name\n"
+        "        Request SDL to use the given render driver (this is just a\n"
+        "        hint).\n"
+        "        Supported names are currently \"direct3d\", \"opengl\",\n"
+        "        \"opengles2\", \"opengles\", \"metal\" and \"software\".\n"
+        "        <https://wiki.libsdl.org/SDL_HINT_RENDER_DRIVER>\n"
+        "\n"
         "    --render-expired-frames\n"
         "        By default, to minimize latency, scrcpy always renders the\n"
         "        last available decoded frame, and drops any previous ones.\n"
         "        This flag forces to render all frames, at a cost of a\n"
         "        possible increased latency.\n"
         "\n"
+        "    --rotation value\n"
+        "        Set the initial display rotation.\n"
+        "        Possibles values are 0, 1, 2 and 3. Each increment adds a 90\n"
+        "        degrees rotation counterclockwise.\n"
+        "\n"
         "    -s, --serial serial\n"
         "        The device serial number. Mandatory only if several devices\n"
         "        are connected to adb.\n"
@@ -110,11 +144,11 @@ scrcpy_print_usage(const char *arg0) {
         "\n"
         "    --window-x value\n"
         "        Set the initial window horizontal position.\n"
-        "        Default is -1 (automatic).\n"
+        "        Default is \"auto\".\n"
         "\n"
         "    --window-y value\n"
         "        Set the initial window vertical position.\n"
-        "        Default is -1 (automatic).\n"
+        "        Default is \"auto\".\n"
         "\n"
         "    --window-width value\n"
         "        Set the initial window width.\n"
@@ -127,73 +161,80 @@ scrcpy_print_usage(const char *arg0) {
         "Shortcuts:\n"
         "\n"
         "    " CTRL_OR_CMD "+f\n"
-        "        switch fullscreen mode\n"
+        "        Switch fullscreen mode\n"
+        "\n"
+        "    " CTRL_OR_CMD "+Left\n"
+        "        Rotate display left\n"
+        "\n"
+        "    " CTRL_OR_CMD "+Right\n"
+        "        Rotate display right\n"
         "\n"
         "    " CTRL_OR_CMD "+g\n"
-        "        resize window to 1:1 (pixel-perfect)\n"
+        "        Resize window to 1:1 (pixel-perfect)\n"
         "\n"
         "    " CTRL_OR_CMD "+x\n"
         "    Double-click on black borders\n"
-        "        resize window to remove black borders\n"
+        "        Resize window to remove black borders\n"
         "\n"
         "    Ctrl+h\n"
         "    Middle-click\n"
-        "        click on HOME\n"
+        "        Click on HOME\n"
         "\n"
         "    " CTRL_OR_CMD "+b\n"
         "    " CTRL_OR_CMD "+Backspace\n"
         "    Right-click (when screen is on)\n"
-        "        click on BACK\n"
+        "        Click on BACK\n"
         "\n"
         "    " CTRL_OR_CMD "+s\n"
-        "        click on APP_SWITCH\n"
+        "        Click on APP_SWITCH\n"
         "\n"
         "    Ctrl+m\n"
-        "        click on MENU\n"
+        "        Click on MENU\n"
         "\n"
         "    " CTRL_OR_CMD "+Up\n"
-        "        click on VOLUME_UP\n"
+        "        Click on VOLUME_UP\n"
         "\n"
         "    " CTRL_OR_CMD "+Down\n"
-        "        click on VOLUME_DOWN\n"
+        "        Click on VOLUME_DOWN\n"
         "\n"
         "    " CTRL_OR_CMD "+p\n"
-        "        click on POWER (turn screen on/off)\n"
+        "        Click on POWER (turn screen on/off)\n"
         "\n"
         "    Right-click (when screen is off)\n"
-        "        power on\n"
+        "        Power on\n"
         "\n"
         "    " CTRL_OR_CMD "+o\n"
-        "        turn device screen off (keep mirroring)\n"
+        "        Turn device screen off (keep mirroring)\n"
         "\n"
         "    " CTRL_OR_CMD "+r\n"
-        "        rotate device screen\n"
+        "        Rotate device screen\n"
         "\n"
         "    " CTRL_OR_CMD "+n\n"
-        "       expand notification panel\n"
+        "        Expand notification panel\n"
         "\n"
         "    " CTRL_OR_CMD "+Shift+n\n"
-        "       collapse notification panel\n"
+        "        Collapse notification panel\n"
         "\n"
         "    " CTRL_OR_CMD "+c\n"
-        "        copy device clipboard to computer\n"
+        "        Copy device clipboard to computer\n"
         "\n"
         "    " CTRL_OR_CMD "+v\n"
-        "        paste computer clipboard to device\n"
+        "        Paste computer clipboard to device\n"
         "\n"
         "    " CTRL_OR_CMD "+Shift+v\n"
-        "        copy computer clipboard to device\n"
+        "        Copy computer clipboard to device\n"
         "\n"
         "    " CTRL_OR_CMD "+i\n"
-        "        enable/disable FPS counter (print frames/second in logs)\n"
+        "        Enable/disable FPS counter (print frames/second in logs)\n"
         "\n"
         "    Drag & drop APK file\n"
-        "        install APK from computer\n"
+        "        Install APK from computer\n"
         "\n",
         arg0,
         DEFAULT_BIT_RATE,
+        DEFAULT_LOCK_VIDEO_ORIENTATION, DEFAULT_LOCK_VIDEO_ORIENTATION >= 0 ? "" : " (unlocked)",
         DEFAULT_MAX_SIZE, DEFAULT_MAX_SIZE ? "" : " (unlimited)",
-        DEFAULT_LOCAL_PORT);
+        DEFAULT_LOCAL_PORT_RANGE_FIRST, DEFAULT_LOCAL_PORT_RANGE_LAST);
 }
 
 static bool
@@ -221,6 +262,27 @@ parse_integer_arg(const char *s, long *out, bool accept_suffix, long min,
     return true;
 }
 
+static size_t
+parse_integers_arg(const char *s, size_t max_items, long *out, long min,
+                   long max, const char *name) {
+    size_t count = parse_integers(s, ':', max_items, out);
+    if (!count) {
+        LOGE("Could not parse %s: %s", name, s);
+        return 0;
+    }
+
+    for (size_t i = 0; i < count; ++i) {
+        long value = out[i];
+        if (value < min || value > max) {
+            LOGE("Could not parse %s: value (%ld) out-of-range (%ld; %ld)",
+                 name, value, min, max);
+            return 0;
+        }
+    }
+
+    return count;
+}
+
 static bool
 parse_bit_rate(const char *s, uint32_t *bit_rate) {
     long value;
@@ -260,9 +322,42 @@ parse_max_fps(const char *s, uint16_t *max_fps) {
 }
 
 static bool
-parse_window_position(const char *s, int16_t *position) {
+parse_lock_video_orientation(const char *s, int8_t *lock_video_orientation) {
     long value;
-    bool ok = parse_integer_arg(s, &value, false, -1, 0x7FFF,
+    bool ok = parse_integer_arg(s, &value, false, -1, 3,
+                                "lock video orientation");
+    if (!ok) {
+        return false;
+    }
+
+    *lock_video_orientation = (int8_t) value;
+    return true;
+}
+
+static bool
+parse_rotation(const char *s, uint8_t *rotation) {
+    long value;
+    bool ok = parse_integer_arg(s, &value, false, 0, 3, "rotation");
+    if (!ok) {
+        return false;
+    }
+
+    *rotation = (uint8_t) value;
+    return true;
+}
+
+static bool
+parse_window_position(const char *s, int16_t *position) {
+    // special value for "auto"
+    static_assert(WINDOW_POSITION_UNDEFINED == -0x8000, "unexpected value");
+
+    if (!strcmp(s, "auto")) {
+        *position = WINDOW_POSITION_UNDEFINED;
+        return true;
+    }
+
+    long value;
+    bool ok = parse_integer_arg(s, &value, false, -0x7FFF, 0x7FFF,
                                 "window position");
     if (!ok) {
         return false;
@@ -286,14 +381,42 @@ parse_window_dimension(const char *s, uint16_t *dimension) {
 }
 
 static bool
-parse_port(const char *s, uint16_t *port) {
+parse_port_range(const char *s, struct port_range *port_range) {
+    long values[2];
+    size_t count = parse_integers_arg(s, 2, values, 0, 0xFFFF, "port");
+    if (!count) {
+        return false;
+    }
+
+    uint16_t v0 = (uint16_t) values[0];
+    if (count == 1) {
+        port_range->first = v0;
+        port_range->last = v0;
+        return true;
+    }
+
+    assert(count == 2);
+    uint16_t v1 = (uint16_t) values[1];
+    if (v0 < v1) {
+        port_range->first = v0;
+        port_range->last = v1;
+    } else {
+        port_range->first = v1;
+        port_range->last = v0;
+    }
+
+    return true;
+}
+
+static bool
+parse_display_id(const char *s, uint16_t *display_id) {
     long value;
-    bool ok = parse_integer_arg(s, &value, false, 0, 0xFFFF, "port");
+    bool ok = parse_integer_arg(s, &value, false, 0, 0xFFFF, "display id");
     if (!ok) {
         return false;
     }
 
-    *port = (uint16_t) value;
+    *display_id = (uint16_t) value;
     return true;
 }
 
@@ -327,51 +450,62 @@ guess_record_format(const char *filename) {
     return 0;
 }
 
-#define OPT_RENDER_EXPIRED_FRAMES 1000
-#define OPT_WINDOW_TITLE          1001
-#define OPT_PUSH_TARGET           1002
-#define OPT_ALWAYS_ON_TOP         1003
-#define OPT_CROP                  1004
-#define OPT_RECORD_FORMAT         1005
-#define OPT_PREFER_TEXT           1006
-#define OPT_WINDOW_X              1007
-#define OPT_WINDOW_Y              1008
-#define OPT_WINDOW_WIDTH          1009
-#define OPT_WINDOW_HEIGHT         1010
-#define OPT_WINDOW_BORDERLESS     1011
-#define OPT_MAX_FPS               1012
+#define OPT_RENDER_EXPIRED_FRAMES  1000
+#define OPT_WINDOW_TITLE           1001
+#define OPT_PUSH_TARGET            1002
+#define OPT_ALWAYS_ON_TOP          1003
+#define OPT_CROP                   1004
+#define OPT_RECORD_FORMAT          1005
+#define OPT_PREFER_TEXT            1006
+#define OPT_WINDOW_X               1007
+#define OPT_WINDOW_Y               1008
+#define OPT_WINDOW_WIDTH           1009
+#define OPT_WINDOW_HEIGHT          1010
+#define OPT_WINDOW_BORDERLESS      1011
+#define OPT_MAX_FPS                1012
+#define OPT_LOCK_VIDEO_ORIENTATION 1013
+#define OPT_DISPLAY_ID             1014
+#define OPT_ROTATION               1015
+#define OPT_RENDER_DRIVER          1016
+#define OPT_NO_MIPMAPS             1017
 
 bool
 scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
     static const struct option long_options[] = {
-        {"always-on-top",         no_argument,       NULL, OPT_ALWAYS_ON_TOP},
-        {"bit-rate",              required_argument, NULL, 'b'},
-        {"crop",                  required_argument, NULL, OPT_CROP},
-        {"fullscreen",            no_argument,       NULL, 'f'},
-        {"help",                  no_argument,       NULL, 'h'},
-        {"max-fps",               required_argument, NULL, OPT_MAX_FPS},
-        {"max-size",              required_argument, NULL, 'm'},
-        {"no-control",            no_argument,       NULL, 'n'},
-        {"no-display",            no_argument,       NULL, 'N'},
-        {"port",                  required_argument, NULL, 'p'},
-        {"push-target",           required_argument, NULL, OPT_PUSH_TARGET},
-        {"record",                required_argument, NULL, 'r'},
-        {"record-format",         required_argument, NULL, OPT_RECORD_FORMAT},
-        {"render-expired-frames", no_argument,       NULL,
-                                                     OPT_RENDER_EXPIRED_FRAMES},
-        {"serial",                required_argument, NULL, 's'},
-        {"show-touches",          no_argument,       NULL, 't'},
-        {"turn-screen-off",       no_argument,       NULL, 'S'},
-        {"prefer-text",           no_argument,       NULL, OPT_PREFER_TEXT},
-        {"version",               no_argument,       NULL, 'v'},
-        {"window-title",          required_argument, NULL, OPT_WINDOW_TITLE},
-        {"window-x",              required_argument, NULL, OPT_WINDOW_X},
-        {"window-y",              required_argument, NULL, OPT_WINDOW_Y},
-        {"window-width",          required_argument, NULL, OPT_WINDOW_WIDTH},
-        {"window-height",         required_argument, NULL, OPT_WINDOW_HEIGHT},
-        {"window-borderless",     no_argument,       NULL,
-                                                     OPT_WINDOW_BORDERLESS},
-        {NULL,                    0,                 NULL, 0  },
+        {"always-on-top",          no_argument,       NULL, OPT_ALWAYS_ON_TOP},
+        {"bit-rate",               required_argument, NULL, 'b'},
+        {"crop",                   required_argument, NULL, OPT_CROP},
+        {"display",                required_argument, NULL, OPT_DISPLAY_ID},
+        {"fullscreen",             no_argument,       NULL, 'f'},
+        {"help",                   no_argument,       NULL, 'h'},
+        {"lock-video-orientation", required_argument, NULL,
+                                                  OPT_LOCK_VIDEO_ORIENTATION},
+        {"max-fps",                required_argument, NULL, OPT_MAX_FPS},
+        {"max-size",               required_argument, NULL, 'm'},
+        {"no-control",             no_argument,       NULL, 'n'},
+        {"no-display",             no_argument,       NULL, 'N'},
+        {"no-mipmaps",             no_argument,       NULL, OPT_NO_MIPMAPS},
+        {"port",                   required_argument, NULL, 'p'},
+        {"push-target",            required_argument, NULL, OPT_PUSH_TARGET},
+        {"record",                 required_argument, NULL, 'r'},
+        {"record-format",          required_argument, NULL, OPT_RECORD_FORMAT},
+        {"render-driver",          required_argument, NULL, OPT_RENDER_DRIVER},
+        {"render-expired-frames",  no_argument,       NULL,
+                                                  OPT_RENDER_EXPIRED_FRAMES},
+        {"rotation",               required_argument, NULL, OPT_ROTATION},
+        {"serial",                 required_argument, NULL, 's'},
+        {"show-touches",           no_argument,       NULL, 't'},
+        {"turn-screen-off",        no_argument,       NULL, 'S'},
+        {"prefer-text",            no_argument,       NULL, OPT_PREFER_TEXT},
+        {"version",                no_argument,       NULL, 'v'},
+        {"window-title",           required_argument, NULL, OPT_WINDOW_TITLE},
+        {"window-x",               required_argument, NULL, OPT_WINDOW_X},
+        {"window-y",               required_argument, NULL, OPT_WINDOW_Y},
+        {"window-width",           required_argument, NULL, OPT_WINDOW_WIDTH},
+        {"window-height",          required_argument, NULL, OPT_WINDOW_HEIGHT},
+        {"window-borderless",      no_argument,       NULL,
+                                                  OPT_WINDOW_BORDERLESS},
+        {NULL,                     0,                 NULL, 0  },
     };
 
     struct scrcpy_options *opts = &args->opts;
@@ -393,6 +527,11 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
             case OPT_CROP:
                 opts->crop = optarg;
                 break;
+            case OPT_DISPLAY_ID:
+                if (!parse_display_id(optarg, &opts->display_id)) {
+                    return false;
+                }
+                break;
             case 'f':
                 opts->fullscreen = true;
                 break;
@@ -417,6 +556,11 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
                     return false;
                 }
                 break;
+            case OPT_LOCK_VIDEO_ORIENTATION:
+                if (!parse_lock_video_orientation(optarg, &opts->lock_video_orientation)) {
+                    return false;
+                }
+                break;
             case 'n':
                 opts->control = false;
                 break;
@@ -424,7 +568,7 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
                 opts->display = false;
                 break;
             case 'p':
-                if (!parse_port(optarg, &opts->port)) {
+                if (!parse_port_range(optarg, &opts->port_range)) {
                     return false;
                 }
                 break;
@@ -484,6 +628,17 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
             case OPT_PREFER_TEXT:
                 opts->prefer_text = true;
                 break;
+            case OPT_ROTATION:
+                if (!parse_rotation(optarg, &opts->rotation)) {
+                    return false;
+                }
+                break;
+            case OPT_RENDER_DRIVER:
+                opts->render_driver = optarg;
+                break;
+            case OPT_NO_MIPMAPS:
+                opts->mipmaps = false;
+                break;
             default:
                 // getopt prints the error message on stderr
                 return false;
@@ -495,11 +650,6 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
         return false;
     }
 
-    if (!opts->display && opts->fullscreen) {
-        LOGE("-f/--fullscreen-window is incompatible with -N/--no-display");
-        return false;
-    }
-
     int index = optind;
     if (index < argc) {
         LOGE("Unexpected additional argument: %s", argv[index]);

app/src/command.c

@@ -4,9 +4,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
 
 #include "config.h"
 #include "common.h"
@@ -58,6 +55,32 @@ argv_to_string(const char *const *argv, char *buf, size_t bufsize) {
     return idx;
 }
 
+static void
+show_adb_installation_msg() {
+#ifndef __WINDOWS__
+    static const struct {
+        const char *binary;
+        const char *command;
+    } pkg_managers[] = {
+        {"apt", "apt install adb"},
+        {"apt-get", "apt-get install adb"},
+        {"brew", "brew cask install android-platform-tools"},
+        {"dnf", "dnf install android-tools"},
+        {"emerge", "emerge dev-util/android-tools"},
+        {"pacman", "pacman -S android-tools"},
+    };
+    for (size_t i = 0; i < ARRAY_LEN(pkg_managers); ++i) {
+        if (cmd_search(pkg_managers[i].binary)) {
+            LOGI("You may install 'adb' by \"%s\"", pkg_managers[i].command);
+            return;
+        }
+    }
+#endif
+
+    LOGI("You may download and install 'adb' from "
+         "https://developer.android.com/studio/releases/platform-tools");
+}
+
 static void
 show_adb_err_msg(enum process_result err, const char *const argv[]) {
     char buf[512];
@@ -71,6 +94,7 @@ show_adb_err_msg(enum process_result err, const char *const argv[]) {
             LOGE("Command not found: %s", buf);
             LOGE("(make 'adb' accessible from your PATH or define its full"
                  "path in the ADB environment variable)");
+            show_adb_installation_msg();
             break;
         case PROCESS_SUCCESS:
             // do nothing
@@ -205,14 +229,3 @@ process_check_success(process_t proc, const char *name) {
     }
     return true;
 }
-
-bool
-is_regular_file(const char *path) {
-    struct stat path_stat;
-    int r = stat(path, &path_stat);
-    if (r) {
-        perror("stat");
-        return false;
-    }
-    return S_ISREG(path_stat.st_mode);
-}

app/src/command.h

@@ -43,6 +43,11 @@ enum process_result {
     PROCESS_ERROR_MISSING_BINARY,
 };
 
+#ifndef __WINDOWS__
+bool
+cmd_search(const char *file);
+#endif
+
 enum process_result
 cmd_execute(const char *const argv[], process_t *process);
 

app/src/common.h

@@ -27,4 +27,9 @@ struct position {
     struct point point;
 };
 
+struct port_range {
+    uint16_t first;
+    uint16_t last;
+};
+
 #endif

app/src/control_msg.c

@@ -45,8 +45,9 @@ control_msg_serialize(const struct control_msg *msg, unsigned char *buf) {
             buffer_write32be(&buf[6], msg->inject_keycode.metastate);
             return 10;
         case CONTROL_MSG_TYPE_INJECT_TEXT: {
-            size_t len = write_string(msg->inject_text.text,
-                                      CONTROL_MSG_TEXT_MAX_LENGTH, &buf[1]);
+            size_t len =
+                write_string(msg->inject_text.text,
+                             CONTROL_MSG_INJECT_TEXT_MAX_LENGTH, &buf[1]);
             return 1 + len;
         }
         case CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT:

app/src/control_msg.h

@@ -10,7 +10,7 @@
 #include "android/keycodes.h"
 #include "common.h"
 
-#define CONTROL_MSG_TEXT_MAX_LENGTH 300
+#define CONTROL_MSG_INJECT_TEXT_MAX_LENGTH 300
 #define CONTROL_MSG_CLIPBOARD_TEXT_MAX_LENGTH 4093
 #define CONTROL_MSG_SERIALIZED_MAX_SIZE \
     (3 + CONTROL_MSG_CLIPBOARD_TEXT_MAX_LENGTH)

app/src/event_converter.c

@@ -94,6 +94,23 @@ convert_keycode(SDL_Keycode from, enum android_keycode *to, uint16_t mod,
         MAP(SDLK_UP,           AKEYCODE_DPAD_UP);
     }
 
+    if (!(mod & (KMOD_NUM | KMOD_SHIFT))) {
+        // Handle Numpad events when Num Lock is disabled
+        // If SHIFT is pressed, a text event will be sent instead
+        switch(from) {
+            MAP(SDLK_KP_0,            AKEYCODE_INSERT);
+            MAP(SDLK_KP_1,            AKEYCODE_MOVE_END);
+            MAP(SDLK_KP_2,            AKEYCODE_DPAD_DOWN);
+            MAP(SDLK_KP_3,            AKEYCODE_PAGE_DOWN);
+            MAP(SDLK_KP_4,            AKEYCODE_DPAD_LEFT);
+            MAP(SDLK_KP_6,            AKEYCODE_DPAD_RIGHT);
+            MAP(SDLK_KP_7,            AKEYCODE_MOVE_HOME);
+            MAP(SDLK_KP_8,            AKEYCODE_DPAD_UP);
+            MAP(SDLK_KP_9,            AKEYCODE_PAGE_UP);
+            MAP(SDLK_KP_PERIOD,       AKEYCODE_FORWARD_DEL);
+        }
+    }
+
     if (prefer_text) {
         // do not forward alpha and space key events
         return false;

app/src/fps_counter.c

@@ -23,7 +23,7 @@ fps_counter_init(struct fps_counter *counter) {
     }
 
     counter->thread = NULL;
-    SDL_AtomicSet(&counter->started, 0);
+    atomic_init(&counter->started, 0);
     // no need to initialize the other fields, they are unused until started
 
     return true;
@@ -35,6 +35,16 @@ fps_counter_destroy(struct fps_counter *counter) {
     SDL_DestroyMutex(counter->mutex);
 }
 
+static inline bool
+is_started(struct fps_counter *counter) {
+    return atomic_load_explicit(&counter->started, memory_order_acquire);
+}
+
+static inline void
+set_started(struct fps_counter *counter, bool started) {
+    atomic_store_explicit(&counter->started, started, memory_order_release);
+}
+
 // must be called with mutex locked
 static void
 display_fps(struct fps_counter *counter) {
@@ -70,10 +80,10 @@ run_fps_counter(void *data) {
 
     mutex_lock(counter->mutex);
     while (!counter->interrupted) {
-        while (!counter->interrupted && !SDL_AtomicGet(&counter->started)) {
+        while (!counter->interrupted && !is_started(counter)) {
             cond_wait(counter->state_cond, counter->mutex);
         }
-        while (!counter->interrupted && SDL_AtomicGet(&counter->started)) {
+        while (!counter->interrupted && is_started(counter)) {
             uint32_t now = SDL_GetTicks();
             check_interval_expired(counter, now);
 
@@ -96,7 +106,7 @@ fps_counter_start(struct fps_counter *counter) {
     counter->nr_skipped = 0;
     mutex_unlock(counter->mutex);
 
-    SDL_AtomicSet(&counter->started, 1);
+    set_started(counter, true);
     cond_signal(counter->state_cond);
 
     // counter->thread is always accessed from the same thread, no need to lock
@@ -114,13 +124,13 @@ fps_counter_start(struct fps_counter *counter) {
 
 void
 fps_counter_stop(struct fps_counter *counter) {
-    SDL_AtomicSet(&counter->started, 0);
+    set_started(counter, false);
     cond_signal(counter->state_cond);
 }
 
 bool
 fps_counter_is_started(struct fps_counter *counter) {
-    return SDL_AtomicGet(&counter->started);
+    return is_started(counter);
 }
 
 void
@@ -145,7 +155,7 @@ fps_counter_join(struct fps_counter *counter) {
 
 void
 fps_counter_add_rendered_frame(struct fps_counter *counter) {
-    if (!SDL_AtomicGet(&counter->started)) {
+    if (!is_started(counter)) {
         return;
     }
 
@@ -158,7 +168,7 @@ fps_counter_add_rendered_frame(struct fps_counter *counter) {
 
 void
 fps_counter_add_skipped_frame(struct fps_counter *counter) {
-    if (!SDL_AtomicGet(&counter->started)) {
+    if (!is_started(counter)) {
         return;
     }
 

app/src/fps_counter.h

@@ -1,9 +1,9 @@
 #ifndef FPSCOUNTER_H
 #define FPSCOUNTER_H
 
+#include <stdatomic.h>
 #include <stdbool.h>
 #include <stdint.h>
-#include <SDL2/SDL_atomic.h>
 #include <SDL2/SDL_mutex.h>
 #include <SDL2/SDL_thread.h>
 
@@ -16,7 +16,7 @@ struct fps_counter {
 
     // atomic so that we can check without locking the mutex
     // if the FPS counter is disabled, we don't want to lock unnecessarily
-    SDL_atomic_t started;
+    atomic_bool started;
 
     // the following fields are protected by the mutex
     bool interrupted;

app/src/input_manager.c

@@ -221,6 +221,18 @@ rotate_device(struct controller *controller) {
     }
 }
 
+static void
+rotate_client_left(struct screen *screen) {
+    unsigned new_rotation = (screen->rotation + 1) % 4;
+    screen_set_rotation(screen, new_rotation);
+}
+
+static void
+rotate_client_right(struct screen *screen) {
+    unsigned new_rotation = (screen->rotation + 3) % 4;
+    screen_set_rotation(screen, new_rotation);
+}
+
 void
 input_manager_process_text_input(struct input_manager *im,
                                  const SDL_TextInputEvent *event) {
@@ -351,6 +363,16 @@ input_manager_process_key(struct input_manager *im,
                     action_volume_up(controller, action);
                 }
                 return;
+            case SDLK_LEFT:
+                if (cmd && !shift && down) {
+                    rotate_client_left(im->screen);
+                }
+                return;
+            case SDLK_RIGHT:
+                if (cmd && !shift && down) {
+                    rotate_client_right(im->screen);
+                }
+                return;
             case SDLK_c:
                 if (control && cmd && !shift && !repeat && down) {
                     request_device_clipboard(controller);
@@ -427,8 +449,8 @@ convert_mouse_motion(const SDL_MouseMotionEvent *from, struct screen *screen,
     to->inject_touch_event.action = AMOTION_EVENT_ACTION_MOVE;
     to->inject_touch_event.pointer_id = POINTER_ID_MOUSE;
     to->inject_touch_event.position.screen_size = screen->frame_size;
-    to->inject_touch_event.position.point.x = from->x;
-    to->inject_touch_event.position.point.y = from->y;
+    to->inject_touch_event.position.point =
+        screen_convert_to_frame_coords(screen, from->x, from->y);
     to->inject_touch_event.pressure = 1.f;
     to->inject_touch_event.buttons = convert_mouse_buttons(from->state);
 
@@ -463,13 +485,13 @@ convert_touch(const SDL_TouchFingerEvent *from, struct screen *screen,
         return false;
     }
 
-    struct size frame_size = screen->frame_size;
-
     to->inject_touch_event.pointer_id = from->fingerId;
-    to->inject_touch_event.position.screen_size = frame_size;
+    to->inject_touch_event.position.screen_size = screen->frame_size;
     // SDL touch event coordinates are normalized in the range [0; 1]
-    to->inject_touch_event.position.point.x = from->x * frame_size.width;
-    to->inject_touch_event.position.point.y = from->y * frame_size.height;
+    float x = from->x * screen->content_size.width;
+    float y = from->y * screen->content_size.height;
+    to->inject_touch_event.position.point =
+        screen_convert_to_frame_coords(screen, x, y);
     to->inject_touch_event.pressure = from->pressure;
     to->inject_touch_event.buttons = 0;
     return true;
@@ -489,8 +511,8 @@ input_manager_process_touch(struct input_manager *im,
 static bool
 is_outside_device_screen(struct input_manager *im, int x, int y)
 {
-    return x < 0 || x >= im->screen->frame_size.width ||
-           y < 0 || y >= im->screen->frame_size.height;
+    return x < 0 || x >= im->screen->content_size.width ||
+           y < 0 || y >= im->screen->content_size.height;
 }
 
 static bool
@@ -504,8 +526,8 @@ convert_mouse_button(const SDL_MouseButtonEvent *from, struct screen *screen,
 
     to->inject_touch_event.pointer_id = POINTER_ID_MOUSE;
     to->inject_touch_event.position.screen_size = screen->frame_size;
-    to->inject_touch_event.position.point.x = from->x;
-    to->inject_touch_event.position.point.y = from->y;
+    to->inject_touch_event.position.point =
+        screen_convert_to_frame_coords(screen, from->x, from->y);
     to->inject_touch_event.pressure = 1.f;
     to->inject_touch_event.buttons =
         convert_mouse_buttons(SDL_BUTTON(from->button));

app/src/opengl.c

@@ -0,0 +1,56 @@
+#include "opengl.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include "SDL2/SDL.h"
+
+void
+sc_opengl_init(struct sc_opengl *gl) {
+    gl->GetString = SDL_GL_GetProcAddress("glGetString");
+    assert(gl->GetString);
+
+    gl->TexParameterf = SDL_GL_GetProcAddress("glTexParameterf");
+    assert(gl->TexParameterf);
+
+    gl->TexParameteri = SDL_GL_GetProcAddress("glTexParameteri");
+    assert(gl->TexParameteri);
+
+    // optional
+    gl->GenerateMipmap = SDL_GL_GetProcAddress("glGenerateMipmap");
+
+    const char *version = (const char *) gl->GetString(GL_VERSION);
+    assert(version);
+    gl->version = version;
+
+#define OPENGL_ES_PREFIX "OpenGL ES "
+    /* starts with "OpenGL ES " */
+    gl->is_opengles = !strncmp(gl->version, OPENGL_ES_PREFIX,
+                               sizeof(OPENGL_ES_PREFIX) - 1);
+    if (gl->is_opengles) {
+        /* skip the prefix */
+        version += sizeof(PREFIX) - 1;
+    }
+
+    int r = sscanf(version, "%d.%d", &gl->version_major, &gl->version_minor);
+    if (r != 2) {
+        // failed to parse the version
+        gl->version_major = 0;
+        gl->version_minor = 0;
+    }
+}
+
+bool
+sc_opengl_version_at_least(struct sc_opengl *gl,
+                           int minver_major, int minver_minor,
+                           int minver_es_major, int minver_es_minor)
+{
+    if (gl->is_opengles) {
+        return gl->version_major > minver_es_major
+            || (gl->version_major == minver_es_major
+             && gl->version_minor >= minver_es_minor);
+    }
+
+    return gl->version_major > minver_major
+        || (gl->version_major == minver_major
+         && gl->version_minor >= minver_minor);
+}

app/src/opengl.h

@@ -0,0 +1,36 @@
+#ifndef SC_OPENGL_H
+#define SC_OPENGL_H
+
+#include <stdbool.h>
+#include <SDL2/SDL_opengl.h>
+
+#include "config.h"
+
+struct sc_opengl {
+    const char *version;
+    bool is_opengles;
+    int version_major;
+    int version_minor;
+
+    const GLubyte *
+    (*GetString)(GLenum name);
+
+    void
+    (*TexParameterf)(GLenum target, GLenum pname, GLfloat param);
+
+    void
+    (*TexParameteri)(GLenum target, GLenum pname, GLint param);
+
+    void
+    (*GenerateMipmap)(GLenum target);
+};
+
+void
+sc_opengl_init(struct sc_opengl *gl);
+
+bool
+sc_opengl_version_at_least(struct sc_opengl *gl,
+                           int minver_major, int minver_minor,
+                           int minver_es_major, int minver_es_minor);
+
+#endif

app/src/scrcpy.c

@@ -47,7 +47,7 @@ static struct input_manager input_manager = {
 
 // init SDL and set appropriate hints
 static bool
-sdl_init_and_configure(bool display) {
+sdl_init_and_configure(bool display, const char *render_driver) {
     uint32_t flags = display ? SDL_INIT_VIDEO : SDL_INIT_EVENTS;
     if (SDL_Init(flags)) {
         LOGC("Could not initialize SDL: %s", SDL_GetError());
@@ -60,9 +60,13 @@ sdl_init_and_configure(bool display) {
         return true;
     }
 
-    // Use the best available scale quality
-    if (!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "2")) {
-        LOGW("Could not enable bilinear filtering");
+    if (render_driver && !SDL_SetHint(SDL_HINT_RENDER_DRIVER, render_driver)) {
+        LOGW("Could not set render driver");
+    }
+
+    // Linear filtering
+    if (!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1")) {
+        LOGW("Could not enable linear filtering");
     }
 
 #ifdef SCRCPY_SDL_HAS_HINT_MOUSE_FOCUS_CLICKTHROUGH
@@ -105,9 +109,10 @@ static int
 event_watcher(void *data, SDL_Event *event) {
     (void) data;
     if (event->type == SDL_WINDOWEVENT
-            && event->window.event == SDL_WINDOWEVENT_RESIZED) {
-        // called from another thread, not very safe, but it's a workaround!
-        screen_render(&screen);
+            && event->window.event == SDL_WINDOWEVENT_SIZE_CHANGED) {
+        // In practice, it seems to always be called from the same thread in
+        // that specific case. Anyway, it's just a workaround.
+        screen_handle_window_event(&screen, &event->window);
     }
     return 0;
 }
@@ -123,6 +128,7 @@ enum event_result {
     EVENT_RESULT_CONTINUE,
     EVENT_RESULT_STOPPED_BY_USER,
     EVENT_RESULT_STOPPED_BY_EOS,
+    EVENT_RESULT_STOPPED_BY_ERROR,
 };
 
 static enum event_result
@@ -145,7 +151,9 @@ handle_event(SDL_Event *event, bool control) {
             }
             break;
         case SDL_WINDOWEVENT:
-            screen_handle_window_event(&screen, &event->window);
+            if (!screen_handle_window_event(&screen, &event->window)) {
+                return EVENT_RESULT_STOPPED_BY_ERROR;
+            }
             break;
         case SDL_TEXTINPUT:
             if (!control) {
@@ -217,6 +225,9 @@ event_loop(bool display, bool control) {
             case EVENT_RESULT_STOPPED_BY_EOS:
                 LOGW("Device disconnected");
                 return false;
+            case EVENT_RESULT_STOPPED_BY_ERROR:
+                LOGC("Stopping due to unrecoverable error");
+                return false;
             case EVENT_RESULT_CONTINUE:
                 break;
         }
@@ -280,11 +291,13 @@ scrcpy(const struct scrcpy_options *options) {
     bool record = !!options->record_filename;
     struct server_params params = {
         .crop = options->crop,
-        .local_port = options->port,
+        .port_range = options->port_range,
         .max_size = options->max_size,
         .bit_rate = options->bit_rate,
         .max_fps = options->max_fps,
+        .lock_video_orientation = options->lock_video_orientation,
         .control = options->control,
+        .display_id = options->display_id,
     };
     if (!server_start(&server, options->serial, &params)) {
         return false;
@@ -308,7 +321,7 @@ scrcpy(const struct scrcpy_options *options) {
     bool controller_initialized = false;
     bool controller_started = false;
 
-    if (!sdl_init_and_configure(options->display)) {
+    if (!sdl_init_and_configure(options->display, options->render_driver)) {
         goto end;
     }
 
@@ -394,7 +407,8 @@ scrcpy(const struct scrcpy_options *options) {
                                    options->always_on_top, options->window_x,
                                    options->window_y, options->window_width,
                                    options->window_height,
-                                   options->window_borderless)) {
+                                   options->window_borderless,
+                                   options->rotation, options-> mipmaps)) {
             goto end;
         }
 

app/src/scrcpy.h

@@ -5,6 +5,7 @@
 #include <stdint.h>
 
 #include "config.h"
+#include "common.h"
 #include "input_manager.h"
 #include "recorder.h"
 
@@ -14,15 +15,19 @@ struct scrcpy_options {
     const char *record_filename;
     const char *window_title;
     const char *push_target;
+    const char *render_driver;
     enum recorder_format record_format;
-    uint16_t port;
+    struct port_range port_range;
     uint16_t max_size;
     uint32_t bit_rate;
     uint16_t max_fps;
-    int16_t window_x;
-    int16_t window_y;
+    int8_t lock_video_orientation;
+    uint8_t rotation;
+    int16_t window_x; // WINDOW_POSITION_UNDEFINED for "auto"
+    int16_t window_y; // WINDOW_POSITION_UNDEFINED for "auto"
     uint16_t window_width;
     uint16_t window_height;
+    uint16_t display_id;
     bool show_touches;
     bool fullscreen;
     bool always_on_top;
@@ -32,6 +37,7 @@ struct scrcpy_options {
     bool render_expired_frames;
     bool prefer_text;
     bool window_borderless;
+    bool mipmaps;
 };
 
 #define SCRCPY_OPTIONS_DEFAULT { \
@@ -40,15 +46,22 @@ struct scrcpy_options {
     .record_filename = NULL, \
     .window_title = NULL, \
     .push_target = NULL, \
+    .render_driver = NULL, \
     .record_format = RECORDER_FORMAT_AUTO, \
-    .port = DEFAULT_LOCAL_PORT, \
+    .port_range = { \
+        .first = DEFAULT_LOCAL_PORT_RANGE_FIRST, \
+        .last = DEFAULT_LOCAL_PORT_RANGE_LAST, \
+    }, \
     .max_size = DEFAULT_MAX_SIZE, \
     .bit_rate = DEFAULT_BIT_RATE, \
     .max_fps = 0, \
-    .window_x = -1, \
-    .window_y = -1, \
+    .lock_video_orientation = DEFAULT_LOCK_VIDEO_ORIENTATION, \
+    .rotation = 0, \
+    .window_x = WINDOW_POSITION_UNDEFINED, \
+    .window_y = WINDOW_POSITION_UNDEFINED, \
     .window_width = 0, \
     .window_height = 0, \
+    .display_id = 0, \
     .show_touches = false, \
     .fullscreen = false, \
     .always_on_top = false, \
@@ -58,6 +71,7 @@ struct scrcpy_options {
     .render_expired_frames = false, \
     .prefer_text = false, \
     .window_borderless = false, \
+    .mipmaps = true, \
 }
 
 bool

app/src/screen.c

@@ -15,6 +15,19 @@
 
 #define DISPLAY_MARGINS 96
 
+static inline struct size
+get_rotated_size(struct size size, int rotation) {
+    struct size rotated_size;
+    if (rotation & 1) {
+        rotated_size.width = size.height;
+        rotated_size.height = size.width;
+    } else {
+        rotated_size.width = size.width;
+        rotated_size.height = size.height;
+    }
+    return rotated_size;
+}
+
 // get the window size in a struct size
 static struct size
 get_window_size(SDL_Window *window) {
@@ -80,8 +93,8 @@ get_preferred_display_bounds(struct size *bounds) {
 //  - it keeps the aspect ratio
 //  - it scales down to make it fit in the display_size
 static struct size
-get_optimal_size(struct size current_size, struct size frame_size) {
-    if (frame_size.width == 0 || frame_size.height == 0) {
+get_optimal_size(struct size current_size, struct size content_size) {
+    if (content_size.width == 0 || content_size.height == 0) {
         // avoid division by 0
         return current_size;
     }
@@ -100,14 +113,21 @@ get_optimal_size(struct size current_size, struct size frame_size) {
         h = MIN(current_size.height, display_size.height);
     }
 
-    bool keep_width = frame_size.width * h > frame_size.height * w;
+    if (h == w * content_size.height / content_size.width
+     || w == h * content_size.width / content_size.height) {
+        // The size is already optimal, if we ignore rounding errors due to
+        // integer window dimensions
+        return (struct size) {w, h};
+    }
+
+    bool keep_width = content_size.width * h > content_size.height * w;
     if (keep_width) {
         // remove black borders on top and bottom
-        h = frame_size.height * w / frame_size.width;
+        h = content_size.height * w / content_size.width;
     } else {
         // remove black borders on left and right (or none at all if it already
         // fits)
-        w = frame_size.width * h / frame_size.height;
+        w = content_size.width * h / content_size.height;
     }
 
     // w and h must fit into 16 bits
@@ -117,33 +137,33 @@ get_optimal_size(struct size current_size, struct size frame_size) {
 
 // same as get_optimal_size(), but read the current size from the window
 static inline struct size
-get_optimal_window_size(const struct screen *screen, struct size frame_size) {
+get_optimal_window_size(const struct screen *screen, struct size content_size) {
     struct size windowed_size = get_windowed_window_size(screen);
-    return get_optimal_size(windowed_size, frame_size);
+    return get_optimal_size(windowed_size, content_size);
 }
 
 // initially, there is no current size, so use the frame size as current size
 // req_width and req_height, if not 0, are the sizes requested by the user
 static inline struct size
-get_initial_optimal_size(struct size frame_size, uint16_t req_width,
+get_initial_optimal_size(struct size content_size, uint16_t req_width,
                          uint16_t req_height) {
     struct size window_size;
     if (!req_width && !req_height) {
-        window_size = get_optimal_size(frame_size, frame_size);
+        window_size = get_optimal_size(content_size, content_size);
     } else {
         if (req_width) {
             window_size.width = req_width;
         } else {
             // compute from the requested height
-            window_size.width = (uint32_t) req_height * frame_size.width
-                              / frame_size.height;
+            window_size.width = (uint32_t) req_height * content_size.width
+                              / content_size.height;
         }
         if (req_height) {
             window_size.height = req_height;
         } else {
             // compute from the requested width
-            window_size.height = (uint32_t) req_width * frame_size.height
-                               / frame_size.width;
+            window_size.height = (uint32_t) req_width * content_size.height
+                               / content_size.width;
         }
     }
     return window_size;
@@ -155,25 +175,51 @@ screen_init(struct screen *screen) {
 }
 
 static inline SDL_Texture *
-create_texture(SDL_Renderer *renderer, struct size frame_size) {
-    return SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12,
-                             SDL_TEXTUREACCESS_STREAMING,
-                             frame_size.width, frame_size.height);
+create_texture(struct screen *screen) {
+    SDL_Renderer *renderer = screen->renderer;
+    struct size size = screen->frame_size;
+    SDL_Texture *texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12,
+                                             SDL_TEXTUREACCESS_STREAMING,
+                                             size.width, size.height);
+    if (!texture) {
+        return NULL;
+    }
+
+    if (screen->mipmaps) {
+        struct sc_opengl *gl = &screen->gl;
+
+        SDL_GL_BindTexture(texture, NULL, NULL);
+
+        // Enable trilinear filtering for downscaling
+        gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+                          GL_LINEAR_MIPMAP_LINEAR);
+        gl->TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, -.5f);
+
+        SDL_GL_UnbindTexture(texture);
+    }
+
+    return texture;
 }
 
 bool
 screen_init_rendering(struct screen *screen, const char *window_title,
                       struct size frame_size, bool always_on_top,
                       int16_t window_x, int16_t window_y, uint16_t window_width,
-                      uint16_t window_height, bool window_borderless) {
+                      uint16_t window_height, bool window_borderless,
+                      uint8_t rotation, bool mipmaps) {
     screen->frame_size = frame_size;
+    screen->rotation = rotation;
+    if (rotation) {
+        LOGI("Initial display rotation set to %u", rotation);
+    }
+    struct size content_size = get_rotated_size(frame_size, screen->rotation);
+    screen->content_size = content_size;
 
     struct size window_size =
-        get_initial_optimal_size(frame_size, window_width, window_height);
-    uint32_t window_flags = SDL_WINDOW_HIDDEN | SDL_WINDOW_RESIZABLE;
-#ifdef HIDPI_SUPPORT
-    window_flags |= SDL_WINDOW_ALLOW_HIGHDPI;
-#endif
+        get_initial_optimal_size(content_size, window_width, window_height);
+    uint32_t window_flags = SDL_WINDOW_HIDDEN
+                          | SDL_WINDOW_RESIZABLE
+                          | SDL_WINDOW_ALLOW_HIGHDPI;
     if (always_on_top) {
 #ifdef SCRCPY_SDL_HAS_WINDOW_ALWAYS_ON_TOP
         window_flags |= SDL_WINDOW_ALWAYS_ON_TOP;
@@ -186,8 +232,10 @@ screen_init_rendering(struct screen *screen, const char *window_title,
         window_flags |= SDL_WINDOW_BORDERLESS;
     }
 
-    int x = window_x != -1 ? window_x : (int) SDL_WINDOWPOS_UNDEFINED;
-    int y = window_y != -1 ? window_y : (int) SDL_WINDOWPOS_UNDEFINED;
+    int x = window_x != WINDOW_POSITION_UNDEFINED
+          ? window_x : (int) SDL_WINDOWPOS_UNDEFINED;
+    int y = window_y != WINDOW_POSITION_UNDEFINED
+          ? window_y : (int) SDL_WINDOWPOS_UNDEFINED;
     screen->window = SDL_CreateWindow(window_title, x, y,
                                       window_size.width, window_size.height,
                                       window_flags);
@@ -204,13 +252,44 @@ screen_init_rendering(struct screen *screen, const char *window_title,
         return false;
     }
 
-    if (SDL_RenderSetLogicalSize(screen->renderer, frame_size.width,
-                                 frame_size.height)) {
+    SDL_RendererInfo renderer_info;
+    int r = SDL_GetRendererInfo(screen->renderer, &renderer_info);
+    const char *renderer_name = r ? NULL : renderer_info.name;
+    LOGI("Renderer: %s", renderer_name ? renderer_name : "(unknown)");
+
+    if (SDL_RenderSetLogicalSize(screen->renderer, content_size.width,
+                                 content_size.height)) {
         LOGE("Could not set renderer logical size: %s", SDL_GetError());
         screen_destroy(screen);
         return false;
     }
 
+    // starts with "opengl"
+    screen->use_opengl = renderer_name && !strncmp(renderer_name, "opengl", 6);
+    if (screen->use_opengl) {
+        struct sc_opengl *gl = &screen->gl;
+        sc_opengl_init(gl);
+
+        LOGI("OpenGL version: %s", gl->version);
+
+        if (mipmaps) {
+            bool supports_mipmaps =
+                sc_opengl_version_at_least(gl, 3, 0, /* OpenGL 3.0+ */
+                                               2, 0  /* OpenGL ES 2.0+ */);
+            if (supports_mipmaps) {
+                LOGI("Trilinear filtering enabled");
+                screen->mipmaps = true;
+            } else {
+                LOGW("Trilinear filtering disabled "
+                     "(OpenGL 3.0+ or ES 2.0+ required)");
+            }
+        } else {
+            LOGI("Trilinear filtering disabled");
+        }
+    } else {
+        LOGW("Trilinear filtering disabled (not an OpenGL renderer)");
+    }
+
     SDL_Surface *icon = read_xpm(icon_xpm);
     if (icon) {
         SDL_SetWindowIcon(screen->window, icon);
@@ -221,7 +300,7 @@ screen_init_rendering(struct screen *screen, const char *window_title,
 
     LOGI("Initial texture: %" PRIu16 "x%" PRIu16, frame_size.width,
                                                   frame_size.height);
-    screen->texture = create_texture(screen->renderer, frame_size);
+    screen->texture = create_texture(screen);
     if (!screen->texture) {
         LOGC("Could not create texture: %s", SDL_GetError());
         screen_destroy(screen);
@@ -230,6 +309,11 @@ screen_init_rendering(struct screen *screen, const char *window_title,
 
     screen->windowed_window_size = window_size;
 
+    struct scale_ratio *rw = &screen->scale.w;
+    struct scale_ratio *rh = &screen->scale.h;
+    SDL_GetWindowSize(screen->window, &rw->window, &rh->window);
+    SDL_GL_GetDrawableSize(screen->window, &rw->drawable, &rh->drawable);
+
     return true;
 }
 
@@ -251,13 +335,51 @@ screen_destroy(struct screen *screen) {
     }
 }
 
+void
+screen_set_rotation(struct screen *screen, unsigned rotation) {
+    assert(rotation < 4);
+    if (rotation == screen->rotation) {
+        return;
+    }
+
+    struct size old_content_size = screen->content_size;
+    struct size new_content_size =
+        get_rotated_size(screen->frame_size, rotation);
+
+    if (SDL_RenderSetLogicalSize(screen->renderer,
+                                 new_content_size.width,
+                                 new_content_size.height)) {
+        LOGE("Could not set renderer logical size: %s", SDL_GetError());
+        return;
+    }
+
+    struct size windowed_size = get_windowed_window_size(screen);
+    struct size target_size = {
+        .width = (uint32_t) windowed_size.width * new_content_size.width
+                / old_content_size.width,
+        .height = (uint32_t) windowed_size.height * new_content_size.height
+                / old_content_size.height,
+    };
+    target_size = get_optimal_size(target_size, new_content_size);
+    set_window_size(screen, target_size);
+
+    screen->content_size = new_content_size;
+    screen->rotation = rotation;
+    LOGI("Display rotation set to %u", rotation);
+
+    screen_render(screen);
+}
+
 // recreate the texture and resize the window if the frame size has changed
 static bool
 prepare_for_frame(struct screen *screen, struct size new_frame_size) {
     if (screen->frame_size.width != new_frame_size.width
             || screen->frame_size.height != new_frame_size.height) {
-        if (SDL_RenderSetLogicalSize(screen->renderer, new_frame_size.width,
-                                     new_frame_size.height)) {
+        struct size new_content_size =
+            get_rotated_size(new_frame_size, screen->rotation);
+        if (SDL_RenderSetLogicalSize(screen->renderer,
+                                     new_content_size.width,
+                                     new_content_size.height)) {
             LOGE("Could not set renderer logical size: %s", SDL_GetError());
             return false;
         }
@@ -265,21 +387,23 @@ prepare_for_frame(struct screen *screen, struct size new_frame_size) {
         // frame dimension changed, destroy texture
         SDL_DestroyTexture(screen->texture);
 
+        struct size content_size = screen->content_size;
         struct size windowed_size = get_windowed_window_size(screen);
         struct size target_size = {
-            (uint32_t) windowed_size.width * new_frame_size.width
-                    / screen->frame_size.width,
-            (uint32_t) windowed_size.height * new_frame_size.height
-                    / screen->frame_size.height,
+            (uint32_t) windowed_size.width * new_content_size.width
+                    / content_size.width,
+            (uint32_t) windowed_size.height * new_content_size.height
+                    / content_size.height,
         };
-        target_size = get_optimal_size(target_size, new_frame_size);
+        target_size = get_optimal_size(target_size, new_content_size);
         set_window_size(screen, target_size);
 
         screen->frame_size = new_frame_size;
+        screen->content_size = new_content_size;
 
         LOGI("New texture: %" PRIu16 "x%" PRIu16,
                      screen->frame_size.width, screen->frame_size.height);
-        screen->texture = create_texture(screen->renderer, new_frame_size);
+        screen->texture = create_texture(screen);
         if (!screen->texture) {
             LOGC("Could not create texture: %s", SDL_GetError());
             return false;
@@ -296,6 +420,13 @@ update_texture(struct screen *screen, const AVFrame *frame) {
             frame->data[0], frame->linesize[0],
             frame->data[1], frame->linesize[1],
             frame->data[2], frame->linesize[2]);
+
+    if (screen->mipmaps) {
+        assert(screen->use_opengl);
+        SDL_GL_BindTexture(screen->texture, NULL, NULL);
+        screen->gl.GenerateMipmap(GL_TEXTURE_2D);
+        SDL_GL_UnbindTexture(screen->texture);
+    }
 }
 
 bool
@@ -317,7 +448,28 @@ screen_update_frame(struct screen *screen, struct video_buffer *vb) {
 void
 screen_render(struct screen *screen) {
     SDL_RenderClear(screen->renderer);
-    SDL_RenderCopy(screen->renderer, screen->texture, NULL, NULL);
+    if (screen->rotation == 0) {
+        SDL_RenderCopy(screen->renderer, screen->texture, NULL, NULL);
+    } else {
+        // rotation in RenderCopyEx() is clockwise, while screen->rotation is
+        // counterclockwise (to be consistent with --lock-video-orientation)
+        int cw_rotation = (4 - screen->rotation) % 4;
+        double angle = 90 * cw_rotation;
+
+        SDL_Rect *dstrect = NULL;
+        SDL_Rect rect;
+        if (screen->rotation & 1) {
+            struct size size = screen->content_size;
+            rect.x = (size.width - size.height) / 2;
+            rect.y = (size.height - size.width) / 2;
+            rect.w = size.height;
+            rect.h = size.width;
+            dstrect = &rect;
+        }
+
+        SDL_RenderCopyEx(screen->renderer, screen->texture, NULL, dstrect,
+                         angle, NULL, 0);
+    }
     SDL_RenderPresent(screen->renderer);
 }
 
@@ -348,9 +500,10 @@ screen_resize_to_fit(struct screen *screen) {
     }
 
     struct size optimal_size =
-        get_optimal_window_size(screen, screen->frame_size);
+        get_optimal_window_size(screen, screen->content_size);
     SDL_SetWindowSize(screen->window, optimal_size.width, optimal_size.height);
-    LOGD("Resized to optimal size");
+    LOGD("Resized to optimal size: %ux%u", optimal_size.width,
+                                           optimal_size.height);
 }
 
 void
@@ -364,16 +517,80 @@ screen_resize_to_pixel_perfect(struct screen *screen) {
         screen->maximized = false;
     }
 
-    SDL_SetWindowSize(screen->window, screen->frame_size.width,
-                      screen->frame_size.height);
-    LOGD("Resized to pixel-perfect");
+    struct size content_size = screen->content_size;
+    SDL_SetWindowSize(screen->window, content_size.width, content_size.height);
+    LOGD("Resized to pixel-perfect: %ux%u", content_size.width,
+                                            content_size.height);
 }
 
-void
+bool
+screen_fix_hidpi(struct screen *screen) {
+    // If the scale ratio has changed, recreate the renderer to fix HiDPI issues
+    // <https://github.com/Genymobile/scrcpy/issues/15>
+
+    int ww, wh, dw, dh;
+    SDL_GetWindowSize(screen->window, &ww, &wh);
+    SDL_GL_GetDrawableSize(screen->window, &dw, &dh);
+
+    struct scale_ratio *rw = &screen->scale.w;
+    struct scale_ratio *rh = &screen->scale.h;
+
+    if (ww * rw->drawable == dw * rw->window &&
+        wh * rh->drawable == dh * rh->window) {
+        // same ratio, both horizontally and vertically, nothing to do
+        return true;
+    }
+
+    // update the current scale
+    rw->window = ww;
+    rh->window = wh;
+    rw->drawable = dw;
+    rh->drawable = dh;
+
+    if (screen->texture) {
+        SDL_DestroyTexture(screen->texture);
+    }
+    if (screen->renderer) {
+        SDL_DestroyRenderer(screen->renderer);
+    }
+
+    screen->renderer = SDL_CreateRenderer(screen->window, -1,
+                                          SDL_RENDERER_ACCELERATED);
+    if (!screen->renderer) {
+        LOGC("Could not create renderer: %s", SDL_GetError());
+        return false;
+    }
+
+    struct size content_size = screen->content_size;
+    if (SDL_RenderSetLogicalSize(screen->renderer, content_size.width,
+                                 content_size.height)) {
+        LOGE("Could not set renderer logical size: %s", SDL_GetError());
+        SDL_DestroyRenderer(screen->renderer);
+        return false;
+    }
+
+    // FIXME this is wrong, we must update the last frame to the new texture,
+    // but we don't have it anymore!
+    screen->texture = create_texture(screen);
+    if (!screen->texture) {
+        LOGC("Could not create texture: %s", SDL_GetError());
+        SDL_DestroyRenderer(screen->renderer);
+        return false;
+    }
+
+    LOGD("Renderer and texture reset");
+    return true;
+}
+
+bool
 screen_handle_window_event(struct screen *screen,
                            const SDL_WindowEvent *event) {
     switch (event->event) {
         case SDL_WINDOWEVENT_EXPOSED:
+            if (!screen_fix_hidpi(screen)) {
+                // unrecoverable
+                return false;
+            }
             screen_render(screen);
             break;
         case SDL_WINDOWEVENT_SIZE_CHANGED:
@@ -409,4 +626,36 @@ screen_handle_window_event(struct screen *screen,
             apply_windowed_size(screen);
             break;
     }
+
+    return true;
+}
+
+struct point
+screen_convert_to_frame_coords(struct screen *screen, int32_t x, int32_t y) {
+    unsigned rotation = screen->rotation;
+    assert(rotation < 4);
+
+    int32_t w = screen->content_size.width;
+    int32_t h = screen->content_size.height;
+    struct point result;
+    switch (rotation) {
+        case 0:
+            result.x = x;
+            result.y = y;
+            break;
+        case 1:
+            result.x = h - y;
+            result.y = x;
+            break;
+        case 2:
+            result.x = w - x;
+            result.y = h - y;
+            break;
+        default:
+            assert(rotation == 3);
+            result.x = y;
+            result.y = w - x;
+            break;
+    }
+    return result;
 }

app/src/screen.h

@@ -7,31 +7,56 @@
 
 #include "config.h"
 #include "common.h"
+#include "opengl.h"
+
+#define WINDOW_POSITION_UNDEFINED (-0x8000)
 
 struct video_buffer;
 
+struct scale_ratio {
+    int window;
+    int drawable;
+};
+
 struct screen {
     SDL_Window *window;
     SDL_Renderer *renderer;
     SDL_Texture *texture;
+    bool use_opengl;
+    struct sc_opengl gl;
     struct size frame_size;
+    struct size content_size; // rotated frame_size
     // The window size the last time it was not maximized or fullscreen.
     struct size windowed_window_size;
     // Since we receive the event SIZE_CHANGED before MAXIMIZED, we must be
     // able to revert the size to its non-maximized value.
     struct size windowed_window_size_backup;
+    // client rotation: 0, 1, 2 or 3 (x90 degrees counterclockwise)
+    unsigned rotation;
     bool has_frame;
     bool fullscreen;
     bool maximized;
     bool no_window;
+    bool mipmaps;
+
+    struct {
+        struct scale_ratio w;
+        struct scale_ratio h;
+    } scale;
 };
 
 #define SCREEN_INITIALIZER { \
     .window = NULL, \
     .renderer = NULL, \
     .texture = NULL, \
+    .use_opengl = false, \
+    .gl = {0}, \
     .frame_size = { \
-        .width = 0,  \
+        .width = 0, \
+        .height = 0, \
+    }, \
+    .content_size = { \
+        .width = 0, \
         .height = 0, \
     }, \
     .windowed_window_size = { \
@@ -42,10 +67,22 @@ struct screen {
         .width = 0, \
         .height = 0, \
     }, \
+    .rotation = 0, \
     .has_frame = false, \
     .fullscreen = false, \
     .maximized = false, \
     .no_window = false, \
+    .mipmaps = false, \
+    .scale = { \
+        .w = { \
+            .window = 0, \
+            .drawable = 0, \
+        }, \
+        .h = { \
+            .window = 0, \
+            .drawable = 0, \
+        }, \
+    } \
 }
 
 // initialize default values
@@ -53,11 +90,13 @@ void
 screen_init(struct screen *screen);
 
 // initialize screen, create window, renderer and texture (window is hidden)
+// window_x and window_y accept WINDOW_POSITION_UNDEFINED
 bool
 screen_init_rendering(struct screen *screen, const char *window_title,
                       struct size frame_size, bool always_on_top,
                       int16_t window_x, int16_t window_y, uint16_t window_width,
-                      uint16_t window_height, bool window_borderless);
+                      uint16_t window_height, bool window_borderless,
+                      uint8_t rotation, bool mipmaps);
 
 // show the window
 void
@@ -87,8 +126,18 @@ screen_resize_to_fit(struct screen *screen);
 void
 screen_resize_to_pixel_perfect(struct screen *screen);
 
-// react to window events
+// set the display rotation (0, 1, 2 or 3, x90 degrees counterclockwise)
 void
+screen_set_rotation(struct screen *screen, unsigned rotation);
+
+// react to window events
+// return true on success, false on unrecoverable error
+bool
 screen_handle_window_event(struct screen *screen, const SDL_WindowEvent *event);
 
+// convert point from window coordinates to frame coordinates
+// x and y are expressed in pixels
+struct point
+screen_convert_to_frame_coords(struct screen *screen, int32_t x, int32_t y);
+
 #endif

app/src/server.c

@@ -5,12 +5,15 @@
 #include <inttypes.h>
 #include <libgen.h>
 #include <stdio.h>
+#include <SDL2/SDL_thread.h>
 #include <SDL2/SDL_timer.h>
+#include <SDL2/SDL_platform.h>
 
 #include "config.h"
 #include "command.h"
 #include "util/log.h"
 #include "util/net.h"
+#include "util/str_util.h"
 
 #define SOCKET_NAME "scrcpy"
 #define SERVER_FILENAME "scrcpy-server"
@@ -18,20 +21,39 @@
 #define DEFAULT_SERVER_PATH PREFIX "/share/scrcpy/" SERVER_FILENAME
 #define DEVICE_SERVER_PATH "/data/local/tmp/scrcpy-server.jar"
 
-static const char *
+static char *
 get_server_path(void) {
+#ifdef __WINDOWS__
+    const wchar_t *server_path_env = _wgetenv(L"SCRCPY_SERVER_PATH");
+#else
     const char *server_path_env = getenv("SCRCPY_SERVER_PATH");
+#endif
     if (server_path_env) {
-        LOGD("Using SCRCPY_SERVER_PATH: %s", server_path_env);
         // if the envvar is set, use it
-        return server_path_env;
+#ifdef __WINDOWS__
+        char *server_path = utf8_from_wide_char(server_path_env);
+#else
+        char *server_path = SDL_strdup(server_path_env);
+#endif
+        if (!server_path) {
+            LOGE("Could not allocate memory");
+            return NULL;
+        }
+        LOGD("Using SCRCPY_SERVER_PATH: %s", server_path);
+        return server_path;
     }
 
 #ifndef PORTABLE
     LOGD("Using server: " DEFAULT_SERVER_PATH);
+    char *server_path = SDL_strdup(DEFAULT_SERVER_PATH);
+    if (!server_path) {
+        LOGE("Could not allocate memory");
+        return NULL;
+    }
     // the absolute path is hardcoded
-    return DEFAULT_SERVER_PATH;
+    return server_path;
 #else
+
     // use scrcpy-server in the same directory as the executable
     char *executable_path = get_executable_path();
     if (!executable_path) {
@@ -67,12 +89,17 @@ get_server_path(void) {
 
 static bool
 push_server(const char *serial) {
-    const char *server_path = get_server_path();
+    char *server_path = get_server_path();
+    if (!server_path) {
+        return false;
+    }
     if (!is_regular_file(server_path)) {
         LOGE("'%s' does not exist or is not a regular file\n", server_path);
+        SDL_free(server_path);
         return false;
     }
     process_t process = adb_push(serial, server_path, DEVICE_SERVER_PATH);
+    SDL_free(server_path);
     return process_check_success(process, "adb push");
 }
 
@@ -100,17 +127,6 @@ disable_tunnel_forward(const char *serial, uint16_t local_port) {
     return process_check_success(process, "adb forward --remove");
 }
 
-static bool
-enable_tunnel(struct server *server) {
-    if (enable_tunnel_reverse(server->serial, server->local_port)) {
-        return true;
-    }
-
-    LOGW("'adb reverse' failed, fallback to 'adb forward'");
-    server->tunnel_forward = true;
-    return enable_tunnel_forward(server->serial, server->local_port);
-}
-
 static bool
 disable_tunnel(struct server *server) {
     if (server->tunnel_forward) {
@@ -119,21 +135,125 @@ disable_tunnel(struct server *server) {
     return disable_tunnel_reverse(server->serial);
 }
 
+static socket_t
+listen_on_port(uint16_t port) {
+#define IPV4_LOCALHOST 0x7F000001
+    return net_listen(IPV4_LOCALHOST, port, 1);
+}
+
+static bool
+enable_tunnel_reverse_any_port(struct server *server,
+                               struct port_range port_range) {
+    uint16_t port = port_range.first;
+    for (;;) {
+        if (!enable_tunnel_reverse(server->serial, port)) {
+            // the command itself failed, it will fail on any port
+            return false;
+        }
+
+        // At the application level, the device part is "the server" because it
+        // serves video stream and control. However, at the network level, the
+        // client listens and the server connects to the client. That way, the
+        // client can listen before starting the server app, so there is no
+        // need to try to connect until the server socket is listening on the
+        // device.
+        server->server_socket = listen_on_port(port);
+        if (server->server_socket != INVALID_SOCKET) {
+            // success
+            server->local_port = port;
+            return true;
+        }
+
+        // failure, disable tunnel and try another port
+        if (!disable_tunnel_reverse(server->serial)) {
+            LOGW("Could not remove reverse tunnel on port %" PRIu16, port);
+        }
+
+        // check before incrementing to avoid overflow on port 65535
+        if (port < port_range.last) {
+            LOGW("Could not listen on port %" PRIu16", retrying on %" PRIu16,
+                 port, (uint16_t) (port + 1));
+            port++;
+            continue;
+        }
+
+        if (port_range.first == port_range.last) {
+            LOGE("Could not listen on port %" PRIu16, port_range.first);
+        } else {
+            LOGE("Could not listen on any port in range %" PRIu16 ":%" PRIu16,
+                 port_range.first, port_range.last);
+        }
+        return false;
+    }
+}
+
+static bool
+enable_tunnel_forward_any_port(struct server *server,
+                               struct port_range port_range) {
+    server->tunnel_forward = true;
+    uint16_t port = port_range.first;
+    for (;;) {
+        if (enable_tunnel_forward(server->serial, port)) {
+            // success
+            server->local_port = port;
+            return true;
+        }
+
+        if (port < port_range.last) {
+            LOGW("Could not forward port %" PRIu16", retrying on %" PRIu16,
+                 port, port + 1);
+            port++;
+            continue;
+        }
+
+        if (port_range.first == port_range.last) {
+            LOGE("Could not forward port %" PRIu16, port_range.first);
+        } else {
+            LOGE("Could not forward any port in range %" PRIu16 ":%" PRIu16,
+                 port_range.first, port_range.last);
+        }
+        return false;
+    }
+}
+
+static bool
+enable_tunnel_any_port(struct server *server, struct port_range port_range) {
+    if (enable_tunnel_reverse_any_port(server, port_range)) {
+        return true;
+    }
+
+    // if "adb reverse" does not work (e.g. over "adb connect"), it fallbacks to
+    // "adb forward", so the app socket is the client
+
+    LOGW("'adb reverse' failed, fallback to 'adb forward'");
+    return enable_tunnel_forward_any_port(server, port_range);
+}
+
 static process_t
 execute_server(struct server *server, const struct server_params *params) {
     char max_size_string[6];
     char bit_rate_string[11];
     char max_fps_string[6];
+    char lock_video_orientation_string[3];
+    char display_id_string[6];
     sprintf(max_size_string, "%"PRIu16, params->max_size);
     sprintf(bit_rate_string, "%"PRIu32, params->bit_rate);
     sprintf(max_fps_string, "%"PRIu16, params->max_fps);
+    sprintf(lock_video_orientation_string, "%"PRIi8, params->lock_video_orientation);
+    sprintf(display_id_string, "%"PRIu16, params->display_id);
     const char *const cmd[] = {
         "shell",
         "CLASSPATH=" DEVICE_SERVER_PATH,
         "app_process",
 #ifdef SERVER_DEBUGGER
 # define SERVER_DEBUGGER_PORT "5005"
+# ifdef SERVER_DEBUGGER_METHOD_NEW
+        /* Android 9 and above */
+        "-XjdwpProvider:internal -XjdwpOptions:transport=dt_socket,suspend=y,server=y,address="
+# else
+        /* Android 8 and below */
         "-agentlib:jdwp=transport=dt_socket,suspend=y,server=y,address="
+# endif
             SERVER_DEBUGGER_PORT,
 #endif
         "/", // unused
@@ -142,10 +262,12 @@ execute_server(struct server *server, const struct server_params *params) {
         max_size_string,
         bit_rate_string,
         max_fps_string,
+        lock_video_orientation_string,
         server->tunnel_forward ? "true" : "false",
         params->crop ? params->crop : "-",
         "true", // always send frame meta (packet boundaries + timestamp)
         params->control ? "true" : "false",
+        display_id_string,
     };
 #ifdef SERVER_DEBUGGER
     LOGI("Server debugger waiting for a client on device port "
@@ -161,13 +283,6 @@ execute_server(struct server *server, const struct server_params *params) {
     return adb_execute(server->serial, cmd, sizeof(cmd) / sizeof(cmd[0]));
 }
 
-#define IPV4_LOCALHOST 0x7F000001
-
-static socket_t
-listen_on_port(uint16_t port) {
-    return net_listen(IPV4_LOCALHOST, port, 1);
-}
-
 static socket_t
 connect_and_read_byte(uint16_t port) {
     socket_t socket = net_connect(IPV4_LOCALHOST, port);
@@ -203,14 +318,12 @@ connect_to_server(uint16_t port, uint32_t attempts, uint32_t delay) {
 }
 
 static void
-close_socket(socket_t *socket) {
-    assert(*socket != INVALID_SOCKET);
-    net_shutdown(*socket, SHUT_RDWR);
-    if (!net_close(*socket)) {
+close_socket(socket_t socket) {
+    assert(socket != INVALID_SOCKET);
+    net_shutdown(socket, SHUT_RDWR);
+    if (!net_close(socket)) {
         LOGW("Could not close socket");
-        return;
     }
-    *socket = INVALID_SOCKET;
 }
 
 void
@@ -218,10 +331,26 @@ server_init(struct server *server) {
     *server = (struct server) SERVER_INITIALIZER;
 }
 
+static int
+run_wait_server(void *data) {
+    struct server *server = data;
+    cmd_simple_wait(server->process, NULL); // ignore exit code
+    // no need for synchronization, server_socket is initialized before this
+    // thread was created
+    if (server->server_socket != INVALID_SOCKET
+            && !atomic_flag_test_and_set(&server->server_socket_closed)) {
+        // On Linux, accept() is unblocked by shutdown(), but on Windows, it is
+        // unblocked by closesocket(). Therefore, call both (close_socket()).
+        close_socket(server->server_socket);
+    }
+    LOGD("Server terminated");
+    return 0;
+}
+
 bool
 server_start(struct server *server, const char *serial,
              const struct server_params *params) {
-    server->local_port = params->local_port;
+    server->port_range = params->port_range;
 
     if (serial) {
         server->serial = SDL_strdup(serial);
@@ -231,49 +360,50 @@ server_start(struct server *server, const char *serial,
     }
 
     if (!push_server(serial)) {
-        SDL_free(server->serial);
-        return false;
+        goto error1;
     }
 
-    if (!enable_tunnel(server)) {
-        SDL_free(server->serial);
-        return false;
-    }
-
-    // if "adb reverse" does not work (e.g. over "adb connect"), it fallbacks to
-    // "adb forward", so the app socket is the client
-    if (!server->tunnel_forward) {
-        // At the application level, the device part is "the server" because it
-        // serves video stream and control. However, at the network level, the
-        // client listens and the server connects to the client. That way, the
-        // client can listen before starting the server app, so there is no
-        // need to try to connect until the server socket is listening on the
-        // device.
-
-        server->server_socket = listen_on_port(params->local_port);
-        if (server->server_socket == INVALID_SOCKET) {
-            LOGE("Could not listen on port %" PRIu16, params->local_port);
-            disable_tunnel(server);
-            SDL_free(server->serial);
-            return false;
-        }
+    if (!enable_tunnel_any_port(server, params->port_range)) {
+        goto error1;
     }
 
     // server will connect to our server socket
     server->process = execute_server(server, params);
-
     if (server->process == PROCESS_NONE) {
-        if (!server->tunnel_forward) {
-            close_socket(&server->server_socket);
-        }
-        disable_tunnel(server);
-        SDL_free(server->serial);
-        return false;
+        goto error2;
+    }
+
+    // If the server process dies before connecting to the server socket, then
+    // the client will be stuck forever on accept(). To avoid the problem, we
+    // must be able to wake up the accept() call when the server dies. To keep
+    // things simple and multiplatform, just spawn a new thread waiting for the
+    // server process and calling shutdown()/close() on the server socket if
+    // necessary to wake up any accept() blocking call.
+    server->wait_server_thread =
+        SDL_CreateThread(run_wait_server, "wait-server", server);
+    if (!server->wait_server_thread) {
+        cmd_terminate(server->process);
+        cmd_simple_wait(server->process, NULL); // ignore exit code
+        goto error2;
     }
 
     server->tunnel_enabled = true;
 
     return true;
+
+error2:
+    if (!server->tunnel_forward) {
+        bool was_closed =
+            atomic_flag_test_and_set(&server->server_socket_closed);
+        // the thread is not started, the flag could not be already set
+        assert(!was_closed);
+        (void) was_closed;
+        close_socket(server->server_socket);
+    }
+    disable_tunnel(server);
+error1:
+    SDL_free(server->serial);
+    return false;
 }
 
 bool
@@ -291,7 +421,11 @@ server_connect_to(struct server *server) {
         }
 
         // we don't need the server socket anymore
-        close_socket(&server->server_socket);
+        if (!atomic_flag_test_and_set(&server->server_socket_closed)) {
+            // close it from here
+            close_socket(server->server_socket);
+            // otherwise, it is closed by run_wait_server()
+        }
     } else {
         uint32_t attempts = 100;
         uint32_t delay = 100; // ms
@@ -318,29 +452,27 @@ server_connect_to(struct server *server) {
 
 void
 server_stop(struct server *server) {
-    if (server->server_socket != INVALID_SOCKET) {
-        close_socket(&server->server_socket);
+    if (server->server_socket != INVALID_SOCKET
+            && !atomic_flag_test_and_set(&server->server_socket_closed)) {
+        close_socket(server->server_socket);
     }
     if (server->video_socket != INVALID_SOCKET) {
-        close_socket(&server->video_socket);
+        close_socket(server->video_socket);
     }
     if (server->control_socket != INVALID_SOCKET) {
-        close_socket(&server->control_socket);
+        close_socket(server->control_socket);
     }
 
     assert(server->process != PROCESS_NONE);
 
-    if (!cmd_terminate(server->process)) {
-        LOGW("Could not terminate server");
-    }
-
-    cmd_simple_wait(server->process, NULL); // ignore exit code
-    LOGD("Server terminated");
+    cmd_terminate(server->process);
 
     if (server->tunnel_enabled) {
         // ignore failure
         disable_tunnel(server);
     }
+
+    SDL_WaitThread(server->wait_server_thread, NULL);
 }
 
 void

app/src/server.h

@@ -1,42 +1,56 @@
 #ifndef SERVER_H
 #define SERVER_H
 
+#include <stdatomic.h>
 #include <stdbool.h>
 #include <stdint.h>
+#include <SDL2/SDL_thread.h>
 
 #include "config.h"
 #include "command.h"
+#include "common.h"
 #include "util/net.h"
 
 struct server {
     char *serial;
     process_t process;
+    SDL_Thread *wait_server_thread;
+    atomic_flag server_socket_closed;
     socket_t server_socket; // only used if !tunnel_forward
     socket_t video_socket;
     socket_t control_socket;
-    uint16_t local_port;
+    struct port_range port_range;
+    uint16_t local_port; // selected from port_range
     bool tunnel_enabled;
     bool tunnel_forward; // use "adb forward" instead of "adb reverse"
 };
 
-#define SERVER_INITIALIZER {          \
-    .serial = NULL,                   \
-    .process = PROCESS_NONE,          \
-    .server_socket = INVALID_SOCKET,  \
-    .video_socket = INVALID_SOCKET,   \
+#define SERVER_INITIALIZER { \
+    .serial = NULL, \
+    .process = PROCESS_NONE, \
+    .wait_server_thread = NULL, \
+    .server_socket_closed = ATOMIC_FLAG_INIT, \
+    .server_socket = INVALID_SOCKET, \
+    .video_socket = INVALID_SOCKET, \
     .control_socket = INVALID_SOCKET, \
-    .local_port = 0,                  \
-    .tunnel_enabled = false,          \
-    .tunnel_forward = false,          \
+    .port_range = { \
+        .first = 0, \
+        .last = 0, \
+    }, \
+    .local_port = 0, \
+    .tunnel_enabled = false, \
+    .tunnel_forward = false, \
 }
 
 struct server_params {
     const char *crop;
-    uint16_t local_port;
+    struct port_range port_range;
     uint16_t max_size;
     uint32_t bit_rate;
     uint16_t max_fps;
+    int8_t lock_video_orientation;
     bool control;
+    uint16_t display_id;
 };
 
 // init default values

app/src/sys/unix/command.c

@@ -14,12 +14,51 @@
 #include <limits.h>
 #include <signal.h>
 #include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <sys/wait.h>
 #include <unistd.h>
 
 #include "util/log.h"
 
+bool
+cmd_search(const char *file) {
+    char *path = getenv("PATH");
+    if (!path)
+        return false;
+    path = strdup(path);
+    if (!path)
+        return false;
+
+    bool ret = false;
+    size_t file_len = strlen(file);
+    char *saveptr;
+    for (char *dir = strtok_r(path, ":", &saveptr); dir;
+            dir = strtok_r(NULL, ":", &saveptr)) {
+        size_t dir_len = strlen(dir);
+        char *fullpath = malloc(dir_len + file_len + 2);
+        if (!fullpath)
+            continue;
+        memcpy(fullpath, dir, dir_len);
+        fullpath[dir_len] = '/';
+        memcpy(fullpath + dir_len + 1, file, file_len + 1);
+
+        struct stat sb;
+        bool fullpath_executable = stat(fullpath, &sb) == 0 &&
+            sb.st_mode & S_IXUSR;
+        free(fullpath);
+        if (fullpath_executable) {
+            ret = true;
+            break;
+        }
+    }
+
+    free(path);
+    return ret;
+}
+
 enum process_result
 cmd_execute(const char *const argv[], pid_t *pid) {
     int fd[2];
@@ -127,3 +166,14 @@ get_executable_path(void) {
     return NULL;
 #endif
 }
+
+bool
+is_regular_file(const char *path) {
+    struct stat path_stat;
+
+    if (stat(path, &path_stat)) {
+        perror("stat");
+        return false;
+    }
+    return S_ISREG(path_stat.st_mode);
+}

app/src/sys/unix/net.c

@@ -1,21 +0,0 @@
-#include "util/net.h"
-
-#include <unistd.h>
-
-#include "config.h"
-
-bool
-net_init(void) {
-    // do nothing
-    return true;
-}
-
-void
-net_cleanup(void) {
-    // do nothing
-}
-
-bool
-net_close(socket_t socket) {
-    return !close(socket);
-}

app/src/sys/win/command.c

@@ -1,5 +1,7 @@
 #include "command.h"
 
+#include <sys/stat.h>
+
 #include "config.h"
 #include "util/log.h"
 #include "util/str_util.h"
@@ -90,3 +92,22 @@ get_executable_path(void) {
     buf[len] = '\0';
     return utf8_from_wide_char(buf);
 }
+
+bool
+is_regular_file(const char *path) {
+    wchar_t *wide_path = utf8_to_wide_char(path);
+    if (!wide_path) {
+        LOGC("Could not allocate wide char string");
+        return false;
+    }
+
+    struct _stat path_stat;
+    int r = _wstat(wide_path, &path_stat);
+    SDL_free(wide_path);
+
+    if (r) {
+        perror("stat");
+        return false;
+    }
+    return S_ISREG(path_stat.st_mode);
+}

app/src/sys/win/net.c

@@ -1,25 +0,0 @@
-#include "util/net.h"
-
-#include "config.h"
-#include "util/log.h"
-
-bool
-net_init(void) {
-    WSADATA wsa;
-    int res = WSAStartup(MAKEWORD(2, 2), &wsa) < 0;
-    if (res < 0) {
-        LOGC("WSAStartup failed with error %d", res);
-        return false;
-    }
-    return true;
-}
-
-void
-net_cleanup(void) {
-    WSACleanup();
-}
-
-bool
-net_close(socket_t socket) {
-    return !closesocket(socket);
-}

app/src/util/net.c

@@ -1,6 +1,7 @@
 #include "net.h"
 
 #include <stdio.h>
+#include <SDL2/SDL_platform.h>
 
 #include "config.h"
 #include "log.h"
@@ -115,3 +116,32 @@ bool
 net_shutdown(socket_t socket, int how) {
     return !shutdown(socket, how);
 }
+
+bool
+net_init(void) {
+#ifdef __WINDOWS__
+    WSADATA wsa;
+    int res = WSAStartup(MAKEWORD(2, 2), &wsa) < 0;
+    if (res < 0) {
+        LOGC("WSAStartup failed with error %d", res);
+        return false;
+    }
+#endif
+    return true;
+}
+
+void
+net_cleanup(void) {
+#ifdef __WINDOWS__
+    WSACleanup();
+#endif
+}
+
+bool
+net_close(socket_t socket) {
+#ifdef __WINDOWS__
+    return !closesocket(socket);
+#else
+    return !close(socket);
+#endif
+}

app/src/util/str_util.c

@@ -81,6 +81,35 @@ parse_integer(const char *s, long *out) {
     return true;
 }
 
+size_t
+parse_integers(const char *s, const char sep, size_t max_items, long *out) {
+    size_t count = 0;
+    char *endptr;
+    do {
+        errno = 0;
+        long value = strtol(s, &endptr, 0);
+        if (errno == ERANGE) {
+            return 0;
+        }
+
+        if (endptr == s || (*endptr != sep && *endptr != '\0')) {
+            return 0;
+        }
+
+        out[count++] = value;
+        if (*endptr == sep) {
+            if (count >= max_items) {
+                // max items already reached, could not accept a new item
+                return 0;
+            }
+            // parse the next token during the next iteration
+            s = endptr + 1;
+        }
+    } while (*endptr != '\0');
+
+    return count;
+}
+
 bool
 parse_integer_with_suffix(const char *s, long *out) {
     char *endptr;

app/src/util/str_util.h

@@ -31,6 +31,11 @@ strquote(const char *src);
 bool
 parse_integer(const char *s, long *out);
 
+// parse s as integers separated by sep (for example '1234:2000')
+// returns the number of integers on success, 0 on failure
+size_t
+parse_integers(const char *s, const char sep, size_t max_items, long *out);
+
 // parse s as an integer into value
 // like parse_integer(), but accept 'k'/'K' (x1000) and 'm'/'M' (x1000000) as
 // suffix

app/tests/test_cli.c

@@ -48,9 +48,10 @@ static void test_options(void) {
         "--fullscreen",
         "--max-fps", "30",
         "--max-size", "1024",
+        "--lock-video-orientation", "2",
         // "--no-control" is not compatible with "--turn-screen-off"
         // "--no-display" is not compatible with "--fulscreen"
-        "--port", "1234",
+        "--port", "1234:1236",
         "--push-target", "/sdcard/Movies",
         "--record", "file",
         "--record-format", "mkv",
@@ -78,7 +79,9 @@ static void test_options(void) {
     assert(opts->fullscreen);
     assert(opts->max_fps == 30);
     assert(opts->max_size == 1024);
-    assert(opts->port == 1234);
+    assert(opts->lock_video_orientation == 2);
+    assert(opts->port_range.first == 1234);
+    assert(opts->port_range.last == 1236);
     assert(!strcmp(opts->push_target, "/sdcard/Movies"));
     assert(!strcmp(opts->record_filename, "file"));
     assert(opts->record_format == RECORDER_FORMAT_MKV);

app/tests/test_control_msg_serialize.c

@@ -49,20 +49,20 @@ static void test_serialize_inject_text(void) {
 static void test_serialize_inject_text_long(void) {
     struct control_msg msg;
     msg.type = CONTROL_MSG_TYPE_INJECT_TEXT;
-    char text[CONTROL_MSG_TEXT_MAX_LENGTH + 1];
+    char text[CONTROL_MSG_INJECT_TEXT_MAX_LENGTH + 1];
     memset(text, 'a', sizeof(text));
-    text[CONTROL_MSG_TEXT_MAX_LENGTH] = '\0';
+    text[CONTROL_MSG_INJECT_TEXT_MAX_LENGTH] = '\0';
     msg.inject_text.text = text;
 
     unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
     int size = control_msg_serialize(&msg, buf);
-    assert(size == 3 + CONTROL_MSG_TEXT_MAX_LENGTH);
+    assert(size == 3 + CONTROL_MSG_INJECT_TEXT_MAX_LENGTH);
 
-    unsigned char expected[3 + CONTROL_MSG_TEXT_MAX_LENGTH];
+    unsigned char expected[3 + CONTROL_MSG_INJECT_TEXT_MAX_LENGTH];
     expected[0] = CONTROL_MSG_TYPE_INJECT_TEXT;
     expected[1] = 0x01;
     expected[2] = 0x2c; // text length (16 bits)
-    memset(&expected[3], 'a', CONTROL_MSG_TEXT_MAX_LENGTH);
+    memset(&expected[3], 'a', CONTROL_MSG_INJECT_TEXT_MAX_LENGTH);
 
     assert(!memcmp(buf, expected, sizeof(expected)));
 }

app/tests/test_strutil.c

@@ -187,6 +187,55 @@ static void test_parse_integer(void) {
     assert(!ok); // out-of-range
 }
 
+static void test_parse_integers(void) {
+    long values[5];
+
+    size_t count = parse_integers("1234", ':', 5, values);
+    assert(count == 1);
+    assert(values[0] == 1234);
+
+    count = parse_integers("1234:5678", ':', 5, values);
+    assert(count == 2);
+    assert(values[0] == 1234);
+    assert(values[1] == 5678);
+
+    count = parse_integers("1234:5678", ':', 2, values);
+    assert(count == 2);
+    assert(values[0] == 1234);
+    assert(values[1] == 5678);
+
+    count = parse_integers("1234:-5678", ':', 2, values);
+    assert(count == 2);
+    assert(values[0] == 1234);
+    assert(values[1] == -5678);
+
+    count = parse_integers("1:2:3:4:5", ':', 5, values);
+    assert(count == 5);
+    assert(values[0] == 1);
+    assert(values[1] == 2);
+    assert(values[2] == 3);
+    assert(values[3] == 4);
+    assert(values[4] == 5);
+
+    count = parse_integers("1234:5678", ':', 1, values);
+    assert(count == 0); // max_items == 1
+
+    count = parse_integers("1:2:3:4:5", ':', 3, values);
+    assert(count == 0); // max_items == 3
+
+    count = parse_integers(":1234", ':', 5, values);
+    assert(count == 0); // invalid
+
+    count = parse_integers("1234:", ':', 5, values);
+    assert(count == 0); // invalid
+
+    count = parse_integers("1234:", ':', 1, values);
+    assert(count == 0); // invalid, even when max_items == 1
+
+    count = parse_integers("1234::5678", ':', 5, values);
+    assert(count == 0); // invalid
+}
+
 static void test_parse_integer_with_suffix(void) {
     long value;
     bool ok = parse_integer_with_suffix("1234", &value);
@@ -249,6 +298,7 @@ int main(void) {
     test_strquote();
     test_utf8_truncate();
     test_parse_integer();
+    test_parse_integers();
     test_parse_integer_with_suffix();
     return 0;
 }

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.4.2'
+        classpath 'com.android.tools.build:gradle:3.6.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

config/checkstyle/checkstyle.xml

@@ -129,11 +129,6 @@ page at http://checkstyle.sourceforge.net/config.html -->
     </module>
     <module name="IllegalInstantiation" />
     <module name="InnerAssignment" />
-    <module name="MagicNumber">
-      <property name="severity" value="info" />
-      <property name="ignoreHashCodeMethod" value="true" />
-      <property name="ignoreAnnotation" value="true" />
-    </module>
     <module name="MissingSwitchDefault" />
     <module name="SimplifyBooleanExpression" />
     <module name="SimplifyBooleanReturn" />

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -125,8 +125,8 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
     JAVACMD=`cygpath --unix "$JAVACMD"`
@@ -154,19 +154,19 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -175,14 +175,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"

gradlew.bat

@@ -29,6 +29,9 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 

meson.build

@@ -1,6 +1,6 @@
 project('scrcpy', 'c',
         version: '1.12.1',
-        meson_version: '>= 0.37',
+        meson_version: '>= 0.48',
         default_options: [
             'c_std=c11',
             'warning_level=2',

meson_options.txt

@@ -4,5 +4,5 @@ option('crossbuild_windows', type: 'boolean', value: false, description: 'Build
 option('windows_noconsole', type: 'boolean', value: false, description: 'Disable console on Windows (pass -mwindows flag)')
 option('prebuilt_server', type: 'string', description: 'Path of the prebuilt server')
 option('portable', type: 'boolean', value: false, description: 'Use scrcpy-server from the same directory as the scrcpy executable')
-option('hidpi_support', type: 'boolean', value: true, description: 'Enable High DPI support')
 option('server_debugger', type: 'boolean', value: false, description: 'Run a server debugger and wait for a client to be attached')
+option('server_debugger_method', type: 'combo', choices: ['old', 'new'], value: 'new', description: 'Select the debugger method (Android < 9: "old", Android >= 9: "new")')

server/meson.build

@@ -3,7 +3,9 @@
 prebuilt_server = get_option('prebuilt_server')
 if prebuilt_server == ''
     custom_target('scrcpy-server',
-                  build_always: true,  # gradle is responsible for tracking source changes
+                  # gradle is responsible for tracking source changes
+                  build_by_default: true,
+                  build_always_stale: true,
                   output: 'scrcpy-server',
                   command: [find_program('./scripts/build-wrapper.sh'), meson.current_source_dir(), '@OUTPUT@', get_option('buildtype')],
                   console: true,

server/src/main/java/com/genymobile/scrcpy/ControlMessageReader.java

@@ -8,14 +8,13 @@ import java.nio.charset.StandardCharsets;
 
 public class ControlMessageReader {
 
-    private static final int INJECT_KEYCODE_PAYLOAD_LENGTH = 9;
-    private static final int INJECT_MOUSE_EVENT_PAYLOAD_LENGTH = 17;
-    private static final int INJECT_TOUCH_EVENT_PAYLOAD_LENGTH = 21;
-    private static final int INJECT_SCROLL_EVENT_PAYLOAD_LENGTH = 20;
-    private static final int SET_SCREEN_POWER_MODE_PAYLOAD_LENGTH = 1;
+    static final int INJECT_KEYCODE_PAYLOAD_LENGTH = 9;
+    static final int INJECT_TOUCH_EVENT_PAYLOAD_LENGTH = 27;
+    static final int INJECT_SCROLL_EVENT_PAYLOAD_LENGTH = 20;
+    static final int SET_SCREEN_POWER_MODE_PAYLOAD_LENGTH = 1;
 
-    public static final int TEXT_MAX_LENGTH = 300;
     public static final int CLIPBOARD_TEXT_MAX_LENGTH = 4093;
+    public static final int INJECT_TEXT_MAX_LENGTH = 300;
     private static final int RAW_BUFFER_SIZE = 1024;
 
     private final byte[] rawBuffer = new byte[RAW_BUFFER_SIZE];
@@ -122,7 +121,6 @@ public class ControlMessageReader {
         return ControlMessage.createInjectText(text);
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     private ControlMessage parseInjectTouchEvent() {
         if (buffer.remaining() < INJECT_TOUCH_EVENT_PAYLOAD_LENGTH) {
             return null;
@@ -172,12 +170,10 @@ public class ControlMessageReader {
         return new Position(x, y, screenWidth, screenHeight);
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     private static int toUnsigned(short value) {
         return value & 0xffff;
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     private static int toUnsigned(byte value) {
         return value & 0xff;
     }

server/src/main/java/com/genymobile/scrcpy/Controller.java

@@ -47,7 +47,6 @@ public class Controller {
         }
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     public void control() throws IOException {
         // on start, power on the device
         if (!device.isScreenOn()) {
@@ -76,19 +75,29 @@ public class Controller {
         ControlMessage msg = connection.receiveControlMessage();
         switch (msg.getType()) {
             case ControlMessage.TYPE_INJECT_KEYCODE:
-                injectKeycode(msg.getAction(), msg.getKeycode(), msg.getMetaState());
+                if (device.supportsInputEvents()) {
+                    injectKeycode(msg.getAction(), msg.getKeycode(), msg.getMetaState());
+                }
                 break;
             case ControlMessage.TYPE_INJECT_TEXT:
-                injectText(msg.getText());
+                if (device.supportsInputEvents()) {
+                    injectText(msg.getText());
+                }
                 break;
             case ControlMessage.TYPE_INJECT_TOUCH_EVENT:
-                injectTouch(msg.getAction(), msg.getPointerId(), msg.getPosition(), msg.getPressure(), msg.getButtons());
+                if (device.supportsInputEvents()) {
+                    injectTouch(msg.getAction(), msg.getPointerId(), msg.getPosition(), msg.getPressure(), msg.getButtons());
+                }
                 break;
             case ControlMessage.TYPE_INJECT_SCROLL_EVENT:
-                injectScroll(msg.getPosition(), msg.getHScroll(), msg.getVScroll());
+                if (device.supportsInputEvents()) {
+                    injectScroll(msg.getPosition(), msg.getHScroll(), msg.getVScroll());
+                }
                 break;
             case ControlMessage.TYPE_BACK_OR_SCREEN_ON:
-                pressBackOrTurnScreenOn();
+                if (device.supportsInputEvents()) {
+                    pressBackOrTurnScreenOn();
+                }
                 break;
             case ControlMessage.TYPE_EXPAND_NOTIFICATION_PANEL:
                 device.expandNotificationPanel();
@@ -104,7 +113,9 @@ public class Controller {
                 device.setClipboardText(msg.getText());
                 break;
             case ControlMessage.TYPE_SET_SCREEN_POWER_MODE:
-                device.setScreenPowerMode(msg.getAction());
+                if (device.supportsInputEvents()) {
+                    device.setScreenPowerMode(msg.getAction());
+                }
                 break;
             case ControlMessage.TYPE_ROTATE_DEVICE:
                 device.rotateDevice();

server/src/main/java/com/genymobile/scrcpy/DesktopConnection.java

@@ -84,7 +84,6 @@ public final class DesktopConnection implements Closeable {
         controlSocket.close();
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     private void send(String deviceName, int width, int height) throws IOException {
         byte[] buffer = new byte[DEVICE_NAME_FIELD_LENGTH + 4];
 

server/src/main/java/com/genymobile/scrcpy/Device.java

@@ -1,5 +1,6 @@
 package com.genymobile.scrcpy;
 
+import com.genymobile.scrcpy.wrappers.InputManager;
 import com.genymobile.scrcpy.wrappers.ServiceManager;
 import com.genymobile.scrcpy.wrappers.SurfaceControl;
 import com.genymobile.scrcpy.wrappers.WindowManager;
@@ -25,13 +26,36 @@ public final class Device {
     private ScreenInfo screenInfo;
     private RotationListener rotationListener;
 
+    /**
+     * Logical display identifier
+     */
+    private final int displayId;
+
+    /**
+     * The surface flinger layer stack associated with this logical display
+     */
+    private final int layerStack;
+
+    private final boolean supportsInputEvents;
+
     public Device(Options options) {
-        screenInfo = computeScreenInfo(options.getCrop(), options.getMaxSize());
+        displayId = options.getDisplayId();
+        DisplayInfo displayInfo = serviceManager.getDisplayManager().getDisplayInfo(displayId);
+        if (displayInfo == null) {
+            int[] displayIds = serviceManager.getDisplayManager().getDisplayIds();
+            throw new InvalidDisplayIdException(displayId, displayIds);
+        }
+
+        int displayInfoFlags = displayInfo.getFlags();
+
+        screenInfo = ScreenInfo.computeScreenInfo(displayInfo, options.getCrop(), options.getMaxSize(), options.getLockedVideoOrientation());
+        layerStack = displayInfo.getLayerStack();
+
         registerRotationWatcher(new IRotationWatcher.Stub() {
             @Override
             public void onRotationChanged(int rotation) throws RemoteException {
                 synchronized (Device.this) {
-                    screenInfo = screenInfo.withRotation(rotation);
+                    screenInfo = screenInfo.withDeviceRotation(rotation);
 
                     // notify
                     if (rotationListener != null) {
@@ -39,89 +63,69 @@ public final class Device {
                     }
                 }
             }
-        });
+        }, displayId);
+
+        if ((displayInfoFlags & DisplayInfo.FLAG_SUPPORTS_PROTECTED_BUFFERS) == 0) {
+            Ln.w("Display doesn't have FLAG_SUPPORTS_PROTECTED_BUFFERS flag, mirroring can be restricted");
+        }
+
+        // main display or any display on Android >= Q
+        supportsInputEvents = displayId == 0 || Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
+        if (!supportsInputEvents) {
+            Ln.w("Input events are not supported for secondary displays before Android 10");
+        }
     }
 
     public synchronized ScreenInfo getScreenInfo() {
         return screenInfo;
     }
 
-    private ScreenInfo computeScreenInfo(Rect crop, int maxSize) {
-        DisplayInfo displayInfo = serviceManager.getDisplayManager().getDisplayInfo();
-        boolean rotated = (displayInfo.getRotation() & 1) != 0;
-        Size deviceSize = displayInfo.getSize();
-        Rect contentRect = new Rect(0, 0, deviceSize.getWidth(), deviceSize.getHeight());
-        if (crop != null) {
-            if (rotated) {
-                // the crop (provided by the user) is expressed in the natural orientation
-                crop = flipRect(crop);
-            }
-            if (!contentRect.intersect(crop)) {
-                // intersect() changes contentRect so that it is intersected with crop
-                Ln.w("Crop rectangle (" + formatCrop(crop) + ") does not intersect device screen (" + formatCrop(deviceSize.toRect()) + ")");
-                contentRect = new Rect(); // empty
-            }
-        }
-
-        Size videoSize = computeVideoSize(contentRect.width(), contentRect.height(), maxSize);
-        return new ScreenInfo(contentRect, videoSize, rotated);
-    }
-
-    private static String formatCrop(Rect rect) {
-        return rect.width() + ":" + rect.height() + ":" + rect.left + ":" + rect.top;
-    }
-
-    @SuppressWarnings("checkstyle:MagicNumber")
-    private static Size computeVideoSize(int w, int h, int maxSize) {
-        // Compute the video size and the padding of the content inside this video.
-        // Principle:
-        // - scale down the great side of the screen to maxSize (if necessary);
-        // - scale down the other side so that the aspect ratio is preserved;
-        // - round this value to the nearest multiple of 8 (H.264 only accepts multiples of 8)
-        w &= ~7; // in case it's not a multiple of 8
-        h &= ~7;
-        if (maxSize > 0) {
-            if (BuildConfig.DEBUG && maxSize % 8 != 0) {
-                throw new AssertionError("Max size must be a multiple of 8");
-            }
-            boolean portrait = h > w;
-            int major = portrait ? h : w;
-            int minor = portrait ? w : h;
-            if (major > maxSize) {
-                int minorExact = minor * maxSize / major;
-                // +4 to round the value to the nearest multiple of 8
-                minor = (minorExact + 4) & ~7;
-                major = maxSize;
-            }
-            w = portrait ? minor : major;
-            h = portrait ? major : minor;
-        }
-        return new Size(w, h);
+    public int getLayerStack() {
+        return layerStack;
     }
 
     public Point getPhysicalPoint(Position position) {
         // it hides the field on purpose, to read it with a lock
         @SuppressWarnings("checkstyle:HiddenField")
         ScreenInfo screenInfo = getScreenInfo(); // read with synchronization
-        Size videoSize = screenInfo.getVideoSize();
-        Size clientVideoSize = position.getScreenSize();
-        if (!videoSize.equals(clientVideoSize)) {
+
+        // ignore the locked video orientation, the events will apply in coordinates considered in the physical device orientation
+        Size unlockedVideoSize = screenInfo.getUnlockedVideoSize();
+
+        int reverseVideoRotation = screenInfo.getReverseVideoRotation();
+        // reverse the video rotation to apply the events
+        Position devicePosition = position.rotate(reverseVideoRotation);
+
+        Size clientVideoSize = devicePosition.getScreenSize();
+        if (!unlockedVideoSize.equals(clientVideoSize)) {
             // The client sends a click relative to a video with wrong dimensions,
             // the device may have been rotated since the event was generated, so ignore the event
             return null;
         }
         Rect contentRect = screenInfo.getContentRect();
-        Point point = position.getPoint();
-        int scaledX = contentRect.left + point.getX() * contentRect.width() / videoSize.getWidth();
-        int scaledY = contentRect.top + point.getY() * contentRect.height() / videoSize.getHeight();
-        return new Point(scaledX, scaledY);
+        Point point = devicePosition.getPoint();
+        int convertedX = contentRect.left + point.getX() * contentRect.width() / unlockedVideoSize.getWidth();
+        int convertedY = contentRect.top + point.getY() * contentRect.height() / unlockedVideoSize.getHeight();
+        return new Point(convertedX, convertedY);
     }
 
     public static String getDeviceName() {
         return Build.MODEL;
     }
 
+    public boolean supportsInputEvents() {
+        return supportsInputEvents;
+    }
+
     public boolean injectInputEvent(InputEvent inputEvent, int mode) {
+        if (!supportsInputEvents()) {
+            throw new AssertionError("Could not inject input event if !supportsInputEvents()");
+        }
+
+        if (displayId != 0 && !InputManager.setDisplayId(inputEvent, displayId)) {
+            return false;
+        }
+
         return serviceManager.getInputManager().injectInputEvent(inputEvent, mode);
     }
 
@@ -129,8 +133,8 @@ public final class Device {
         return serviceManager.getPowerManager().isScreenOn();
     }
 
-    public void registerRotationWatcher(IRotationWatcher rotationWatcher) {
-        serviceManager.getWindowManager().registerRotationWatcher(rotationWatcher);
+    public void registerRotationWatcher(IRotationWatcher rotationWatcher, int displayId) {
+        serviceManager.getWindowManager().registerRotationWatcher(rotationWatcher, displayId);
     }
 
     public synchronized void setRotationListener(RotationListener rotationListener) {
@@ -154,8 +158,10 @@ public final class Device {
     }
 
     public void setClipboardText(String text) {
-        serviceManager.getClipboardManager().setText(text);
-        Ln.i("Device clipboard set");
+        boolean ok = serviceManager.getClipboardManager().setText(text);
+        if (ok) {
+            Ln.i("Device clipboard set");
+        }
     }
 
     /**
@@ -167,8 +173,10 @@ public final class Device {
             Ln.e("Could not get built-in display");
             return;
         }
-        SurfaceControl.setDisplayPowerMode(d, mode);
-        Ln.i("Device screen turned " + (mode == Device.POWER_MODE_OFF ? "off" : "on"));
+        boolean ok = SurfaceControl.setDisplayPowerMode(d, mode);
+        if (ok) {
+            Ln.i("Device screen turned " + (mode == Device.POWER_MODE_OFF ? "off" : "on"));
+        }
     }
 
     /**
@@ -191,8 +199,4 @@ public final class Device {
             wm.thawRotation();
         }
     }
-
-    static Rect flipRect(Rect crop) {
-        return new Rect(crop.top, crop.left, crop.bottom, crop.right);
-    }
 }

server/src/main/java/com/genymobile/scrcpy/DeviceMessageWriter.java

@@ -13,7 +13,6 @@ public class DeviceMessageWriter {
     private final byte[] rawBuffer = new byte[MAX_EVENT_SIZE];
     private final ByteBuffer buffer = ByteBuffer.wrap(rawBuffer);
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     public void writeTo(DeviceMessage msg, OutputStream output) throws IOException {
         buffer.clear();
         buffer.put((byte) DeviceMessage.TYPE_CLIPBOARD);

server/src/main/java/com/genymobile/scrcpy/DisplayInfo.java

@@ -1,12 +1,24 @@
 package com.genymobile.scrcpy;
 
 public final class DisplayInfo {
+    private final int displayId;
     private final Size size;
     private final int rotation;
+    private final int layerStack;
+    private final int flags;
 
-    public DisplayInfo(Size size, int rotation) {
+    public static final int FLAG_SUPPORTS_PROTECTED_BUFFERS = 0x00000001;
+
+    public DisplayInfo(int displayId, Size size, int rotation, int layerStack, int flags) {
+        this.displayId = displayId;
         this.size = size;
         this.rotation = rotation;
+        this.layerStack = layerStack;
+        this.flags = flags;
+    }
+
+    public int getDisplayId() {
+        return displayId;
     }
 
     public Size getSize() {
@@ -16,5 +28,13 @@ public final class DisplayInfo {
     public int getRotation() {
         return rotation;
     }
+
+    public int getLayerStack() {
+        return layerStack;
+    }
+
+    public int getFlags() {
+        return flags;
+    }
 }
 

server/src/main/java/com/genymobile/scrcpy/InvalidDisplayIdException.java

@@ -0,0 +1,21 @@
+package com.genymobile.scrcpy;
+
+public class InvalidDisplayIdException extends RuntimeException {
+
+    private final int displayId;
+    private final int[] availableDisplayIds;
+
+    public InvalidDisplayIdException(int displayId, int[] availableDisplayIds) {
+        super("There is no display having id " + displayId);
+        this.displayId = displayId;
+        this.availableDisplayIds = availableDisplayIds;
+    }
+
+    public int getDisplayId() {
+        return displayId;
+    }
+
+    public int[] getAvailableDisplayIds() {
+        return availableDisplayIds;
+    }
+}

server/src/main/java/com/genymobile/scrcpy/Options.java

@@ -6,10 +6,12 @@ public class Options {
     private int maxSize;
     private int bitRate;
     private int maxFps;
+    private int lockedVideoOrientation;
     private boolean tunnelForward;
     private Rect crop;
     private boolean sendFrameMeta; // send PTS so that the client may record properly
     private boolean control;
+    private int displayId;
 
     public int getMaxSize() {
         return maxSize;
@@ -35,6 +37,14 @@ public class Options {
         this.maxFps = maxFps;
     }
 
+    public int getLockedVideoOrientation() {
+        return lockedVideoOrientation;
+    }
+
+    public void setLockedVideoOrientation(int lockedVideoOrientation) {
+        this.lockedVideoOrientation = lockedVideoOrientation;
+    }
+
     public boolean isTunnelForward() {
         return tunnelForward;
     }
@@ -66,4 +76,12 @@ public class Options {
     public void setControl(boolean control) {
         this.control = control;
     }
+
+    public int getDisplayId() {
+        return displayId;
+    }
+
+    public void setDisplayId(int displayId) {
+        this.displayId = displayId;
+    }
 }

server/src/main/java/com/genymobile/scrcpy/Position.java

@@ -23,6 +23,19 @@ public class Position {
         return screenSize;
     }
 
+    public Position rotate(int rotation) {
+        switch (rotation) {
+            case 1:
+                return new Position(new Point(screenSize.getHeight() - point.getY(), point.getX()), screenSize.rotate());
+            case 2:
+                return new Position(new Point(screenSize.getWidth() - point.getX(), screenSize.getHeight() - point.getY()), screenSize);
+            case 3:
+                return new Position(new Point(point.getY(), screenSize.getWidth() - point.getX()), screenSize.rotate());
+            default:
+                return this;
+        }
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) {

server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java

@@ -6,7 +6,6 @@ import android.graphics.Rect;
 import android.media.MediaCodec;
 import android.media.MediaCodecInfo;
 import android.media.MediaFormat;
-import android.os.Build;
 import android.os.IBinder;
 import android.view.Surface;
 
@@ -19,6 +18,7 @@ public class ScreenEncoder implements Device.RotationListener {
 
     private static final int DEFAULT_I_FRAME_INTERVAL = 10; // seconds
     private static final int REPEAT_FRAME_DELAY_US = 100_000; // repeat after 100ms
+    private static final String KEY_MAX_FPS_TO_ENCODER = "max-fps-to-encoder";
 
     private static final int NO_PTS = -1;
 
@@ -27,19 +27,13 @@ public class ScreenEncoder implements Device.RotationListener {
 
     private int bitRate;
     private int maxFps;
-    private int iFrameInterval;
     private boolean sendFrameMeta;
     private long ptsOrigin;
 
-    public ScreenEncoder(boolean sendFrameMeta, int bitRate, int maxFps, int iFrameInterval) {
+    public ScreenEncoder(boolean sendFrameMeta, int bitRate, int maxFps) {
         this.sendFrameMeta = sendFrameMeta;
         this.bitRate = bitRate;
         this.maxFps = maxFps;
-        this.iFrameInterval = iFrameInterval;
-    }
-
-    public ScreenEncoder(boolean sendFrameMeta, int bitRate, int maxFps) {
-        this(sendFrameMeta, bitRate, maxFps, DEFAULT_I_FRAME_INTERVAL);
     }
 
     @Override
@@ -55,19 +49,26 @@ public class ScreenEncoder implements Device.RotationListener {
         Workarounds.prepareMainLooper();
         Workarounds.fillAppInfo();
 
-        MediaFormat format = createFormat(bitRate, maxFps, iFrameInterval);
+        MediaFormat format = createFormat(bitRate, maxFps, DEFAULT_I_FRAME_INTERVAL);
         device.setRotationListener(this);
         boolean alive;
         try {
             do {
                 MediaCodec codec = createCodec();
                 IBinder display = createDisplay();
-                Rect contentRect = device.getScreenInfo().getContentRect();
-                Rect videoRect = device.getScreenInfo().getVideoSize().toRect();
+                ScreenInfo screenInfo = device.getScreenInfo();
+                Rect contentRect = screenInfo.getContentRect();
+                // include the locked video orientation
+                Rect videoRect = screenInfo.getVideoSize().toRect();
+                // does not include the locked video orientation
+                Rect unlockedVideoRect = screenInfo.getUnlockedVideoSize().toRect();
+                int videoRotation = screenInfo.getVideoRotation();
+                int layerStack = device.getLayerStack();
+
                 setSize(format, videoRect.width(), videoRect.height());
                 configure(codec, format);
                 Surface surface = codec.createInputSurface();
-                setDisplaySurface(display, surface, contentRect, videoRect);
+                setDisplaySurface(display, surface, videoRotation, contentRect, unlockedVideoRect, layerStack);
                 codec.start();
                 try {
                     alive = encode(codec, fd);
@@ -135,13 +136,12 @@ public class ScreenEncoder implements Device.RotationListener {
     }
 
     private static MediaCodec createCodec() throws IOException {
-        return MediaCodec.createEncoderByType("video/avc");
+        return MediaCodec.createEncoderByType(MediaFormat.MIMETYPE_VIDEO_AVC);
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     private static MediaFormat createFormat(int bitRate, int maxFps, int iFrameInterval) {
         MediaFormat format = new MediaFormat();
-        format.setString(MediaFormat.KEY_MIME, "video/avc");
+        format.setString(MediaFormat.KEY_MIME, MediaFormat.MIMETYPE_VIDEO_AVC);
         format.setInteger(MediaFormat.KEY_BIT_RATE, bitRate);
         // must be present to configure the encoder, but does not impact the actual frame rate, which is variable
         format.setInteger(MediaFormat.KEY_FRAME_RATE, 60);
@@ -150,11 +150,10 @@ public class ScreenEncoder implements Device.RotationListener {
         // display the very first frame, and recover from bad quality when no new frames
         format.setLong(MediaFormat.KEY_REPEAT_PREVIOUS_FRAME_AFTER, REPEAT_FRAME_DELAY_US); // µs
         if (maxFps > 0) {
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
-                format.setFloat(MediaFormat.KEY_MAX_FPS_TO_ENCODER, maxFps);
-            } else {
-                Ln.w("Max FPS is only supported since Android 10, the option has been ignored");
-            }
+            // The key existed privately before Android 10:
+            // <https://android.googlesource.com/platform/frameworks/base/+/625f0aad9f7a259b6881006ad8710adce57d1384%5E%21/>
+            // <https://github.com/Genymobile/scrcpy/issues/488#issuecomment-567321437>
+            format.setFloat(KEY_MAX_FPS_TO_ENCODER, maxFps);
         }
         return format;
     }
@@ -172,12 +171,12 @@ public class ScreenEncoder implements Device.RotationListener {
         format.setInteger(MediaFormat.KEY_HEIGHT, height);
     }
 
-    private static void setDisplaySurface(IBinder display, Surface surface, Rect deviceRect, Rect displayRect) {
+    private static void setDisplaySurface(IBinder display, Surface surface, int orientation, Rect deviceRect, Rect displayRect, int layerStack) {
         SurfaceControl.openTransaction();
         try {
             SurfaceControl.setDisplaySurface(display, surface);
-            SurfaceControl.setDisplayProjection(display, 0, deviceRect, displayRect);
-            SurfaceControl.setDisplayLayerStack(display, 0);
+            SurfaceControl.setDisplayProjection(display, orientation, deviceRect, displayRect);
+            SurfaceControl.setDisplayLayerStack(display, layerStack);
         } finally {
             SurfaceControl.closeTransaction();
         }

server/src/main/java/com/genymobile/scrcpy/ScreenInfo.java

@@ -3,29 +3,161 @@ package com.genymobile.scrcpy;
 import android.graphics.Rect;
 
 public final class ScreenInfo {
+    /**
+     * Device (physical) size, possibly cropped
+     */
     private final Rect contentRect; // device size, possibly cropped
-    private final Size videoSize;
-    private final boolean rotated;
 
-    public ScreenInfo(Rect contentRect, Size videoSize, boolean rotated) {
+    /**
+     * Video size, possibly smaller than the device size, already taking the device rotation and crop into account.
+     * <p>
+     * However, it does not include the locked video orientation.
+     */
+    private final Size unlockedVideoSize;
+
+    /**
+     * Device rotation, related to the natural device orientation (0, 1, 2 or 3)
+     */
+    private final int deviceRotation;
+
+    /**
+     * The locked video orientation (-1: disabled, 0: normal, 1: 90° CCW, 2: 180°, 3: 90° CW)
+     */
+    private final int lockedVideoOrientation;
+
+    public ScreenInfo(Rect contentRect, Size unlockedVideoSize, int deviceRotation, int lockedVideoOrientation) {
         this.contentRect = contentRect;
-        this.videoSize = videoSize;
-        this.rotated = rotated;
+        this.unlockedVideoSize = unlockedVideoSize;
+        this.deviceRotation = deviceRotation;
+        this.lockedVideoOrientation = lockedVideoOrientation;
     }
 
     public Rect getContentRect() {
         return contentRect;
     }
 
-    public Size getVideoSize() {
-        return videoSize;
+    /**
+     * Return the video size as if locked video orientation was not set.
+     *
+     * @return the unlocked video size
+     */
+    public Size getUnlockedVideoSize() {
+        return unlockedVideoSize;
     }
 
-    public ScreenInfo withRotation(int rotation) {
-        boolean newRotated = (rotation & 1) != 0;
-        if (rotated == newRotated) {
+    /**
+     * Return the actual video size if locked video orientation is set.
+     *
+     * @return the actual video size
+     */
+    public Size getVideoSize() {
+        if (getVideoRotation() % 2 == 0) {
+            return unlockedVideoSize;
+        }
+
+        return unlockedVideoSize.rotate();
+    }
+
+    public int getDeviceRotation() {
+        return deviceRotation;
+    }
+
+    public ScreenInfo withDeviceRotation(int newDeviceRotation) {
+        if (newDeviceRotation == deviceRotation) {
             return this;
         }
-        return new ScreenInfo(Device.flipRect(contentRect), videoSize.rotate(), newRotated);
+        // true if changed between portrait and landscape
+        boolean orientationChanged = (deviceRotation + newDeviceRotation) % 2 != 0;
+        Rect newContentRect;
+        Size newUnlockedVideoSize;
+        if (orientationChanged) {
+            newContentRect = flipRect(contentRect);
+            newUnlockedVideoSize = unlockedVideoSize.rotate();
+        } else {
+            newContentRect = contentRect;
+            newUnlockedVideoSize = unlockedVideoSize;
+        }
+        return new ScreenInfo(newContentRect, newUnlockedVideoSize, newDeviceRotation, lockedVideoOrientation);
+    }
+
+    public static ScreenInfo computeScreenInfo(DisplayInfo displayInfo, Rect crop, int maxSize, int lockedVideoOrientation) {
+        int rotation = displayInfo.getRotation();
+        Size deviceSize = displayInfo.getSize();
+        Rect contentRect = new Rect(0, 0, deviceSize.getWidth(), deviceSize.getHeight());
+        if (crop != null) {
+            if (rotation % 2 != 0) { // 180s preserve dimensions
+                // the crop (provided by the user) is expressed in the natural orientation
+                crop = flipRect(crop);
+            }
+            if (!contentRect.intersect(crop)) {
+                // intersect() changes contentRect so that it is intersected with crop
+                Ln.w("Crop rectangle (" + formatCrop(crop) + ") does not intersect device screen (" + formatCrop(deviceSize.toRect()) + ")");
+                contentRect = new Rect(); // empty
+            }
+        }
+
+        Size videoSize = computeVideoSize(contentRect.width(), contentRect.height(), maxSize);
+        return new ScreenInfo(contentRect, videoSize, rotation, lockedVideoOrientation);
+    }
+
+    private static String formatCrop(Rect rect) {
+        return rect.width() + ":" + rect.height() + ":" + rect.left + ":" + rect.top;
+    }
+
+    private static Size computeVideoSize(int w, int h, int maxSize) {
+        // Compute the video size and the padding of the content inside this video.
+        // Principle:
+        // - scale down the great side of the screen to maxSize (if necessary);
+        // - scale down the other side so that the aspect ratio is preserved;
+        // - round this value to the nearest multiple of 8 (H.264 only accepts multiples of 8)
+        w &= ~7; // in case it's not a multiple of 8
+        h &= ~7;
+        if (maxSize > 0) {
+            if (BuildConfig.DEBUG && maxSize % 8 != 0) {
+                throw new AssertionError("Max size must be a multiple of 8");
+            }
+            boolean portrait = h > w;
+            int major = portrait ? h : w;
+            int minor = portrait ? w : h;
+            if (major > maxSize) {
+                int minorExact = minor * maxSize / major;
+                // +4 to round the value to the nearest multiple of 8
+                minor = (minorExact + 4) & ~7;
+                major = maxSize;
+            }
+            w = portrait ? minor : major;
+            h = portrait ? major : minor;
+        }
+        return new Size(w, h);
+    }
+
+    private static Rect flipRect(Rect crop) {
+        return new Rect(crop.top, crop.left, crop.bottom, crop.right);
+    }
+
+    /**
+     * Return the rotation to apply to the device rotation to get the requested locked video orientation
+     *
+     * @return the rotation offset
+     */
+    public int getVideoRotation() {
+        if (lockedVideoOrientation == -1) {
+            // no offset
+            return 0;
+        }
+        return (deviceRotation + 4 - lockedVideoOrientation) % 4;
+    }
+
+    /**
+     * Return the rotation to apply to the requested locked video orientation to get the device rotation
+     *
+     * @return the (reverse) rotation offset
+     */
+    public int getReverseVideoRotation() {
+        if (lockedVideoOrientation == -1) {
+            // no offset
+            return 0;
+        }
+        return (lockedVideoOrientation + 4 - deviceRotation) % 4;
     }
 }

server/src/main/java/com/genymobile/scrcpy/Server.java

@@ -16,6 +16,7 @@ public final class Server {
     }
 
     private static void scrcpy(Options options) throws IOException {
+        Ln.i("Device: " + Build.MANUFACTURER + " " + Build.MODEL + " (Android " + Build.VERSION.RELEASE + ")");
         final Device device = new Device(options);
         boolean tunnelForward = options.isTunnelForward();
         try (DesktopConnection connection = DesktopConnection.open(device, tunnelForward)) {
@@ -67,7 +68,6 @@ public final class Server {
         }).start();
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     private static Options createOptions(String... args) {
         if (args.length < 1) {
             throw new IllegalArgumentException("Missing client version");
@@ -76,11 +76,11 @@ public final class Server {
         String clientVersion = args[0];
         if (!clientVersion.equals(BuildConfig.VERSION_NAME)) {
             throw new IllegalArgumentException(
-                    "The server version (" + clientVersion + ") does not match the client " + "(" + BuildConfig.VERSION_NAME + ")");
+                    "The server version (" + BuildConfig.VERSION_NAME + ") does not match the client " + "(" + clientVersion + ")");
         }
 
-        if (args.length != 8) {
-            throw new IllegalArgumentException("Expecting 8 parameters");
+        if (args.length != 10) {
+            throw new IllegalArgumentException("Expecting 10 parameters");
         }
 
         Options options = new Options();
@@ -94,23 +94,28 @@ public final class Server {
         int maxFps = Integer.parseInt(args[3]);
         options.setMaxFps(maxFps);
 
+        int lockedVideoOrientation = Integer.parseInt(args[4]);
+        options.setLockedVideoOrientation(lockedVideoOrientation);
+
         // use "adb forward" instead of "adb tunnel"? (so the server must listen)
-        boolean tunnelForward = Boolean.parseBoolean(args[4]);
+        boolean tunnelForward = Boolean.parseBoolean(args[5]);
         options.setTunnelForward(tunnelForward);
 
-        Rect crop = parseCrop(args[5]);
+        Rect crop = parseCrop(args[6]);
         options.setCrop(crop);
 
-        boolean sendFrameMeta = Boolean.parseBoolean(args[6]);
+        boolean sendFrameMeta = Boolean.parseBoolean(args[7]);
         options.setSendFrameMeta(sendFrameMeta);
 
-        boolean control = Boolean.parseBoolean(args[7]);
+        boolean control = Boolean.parseBoolean(args[8]);
         options.setControl(control);
 
+        int displayId = Integer.parseInt(args[9]);
+        options.setDisplayId(displayId);
+
         return options;
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     private static Rect parseCrop(String crop) {
         if ("-".equals(crop)) {
             return null;
@@ -135,7 +140,6 @@ public final class Server {
         }
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     private static void suggestFix(Throwable e) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             if (e instanceof MediaCodec.CodecException) {
@@ -147,6 +151,16 @@ public final class Server {
                 }
             }
         }
+        if (e instanceof InvalidDisplayIdException) {
+            InvalidDisplayIdException idie = (InvalidDisplayIdException) e;
+            int[] displayIds = idie.getAvailableDisplayIds();
+            if (displayIds != null && displayIds.length > 0) {
+                Ln.e("Try to use one of the available display ids:");
+                for (int id : displayIds) {
+                    Ln.e("    scrcpy --display " + id);
+                }
+            }
+        }
     }
 
     public static void main(String... args) throws Exception {

server/src/main/java/com/genymobile/scrcpy/StringUtils.java

@@ -5,7 +5,6 @@ public final class StringUtils {
         // not instantiable
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     public static int getUtf8TruncationIndex(byte[] utf8, int maxLength) {
         int len = utf8.length;
         if (len <= maxLength) {

server/src/main/java/com/genymobile/scrcpy/Workarounds.java

@@ -28,7 +28,7 @@ public final class Workarounds {
         Looper.prepareMainLooper();
     }
 
-    @SuppressLint("PrivateApi")
+    @SuppressLint("PrivateApi,DiscouragedPrivateApi")
     public static void fillAppInfo() {
         try {
             // ActivityThread activityThread = new ActivityThread();
@@ -73,7 +73,7 @@ public final class Workarounds {
             mInitialApplicationField.set(activityThread, app);
         } catch (Throwable throwable) {
             // this is a workaround, so failing is not an error
-            Ln.w("Could not fill app info: " + throwable.getMessage());
+            Ln.d("Could not fill app info: " + throwable.getMessage());
         }
     }
 }

server/src/main/java/com/genymobile/scrcpy/wrappers/ClipboardManager.java

@@ -74,13 +74,15 @@ public class ClipboardManager {
         }
     }
 
-    public void setText(CharSequence text) {
+    public boolean setText(CharSequence text) {
         try {
             Method method = getSetPrimaryClipMethod();
             ClipData clipData = ClipData.newPlainText(null, text);
             setPrimaryClip(method, manager, clipData);
+            return true;
         } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) {
             Ln.e("Could not invoke method", e);
+            return false;
         }
     }
 }

server/src/main/java/com/genymobile/scrcpy/wrappers/DisplayManager.java

@@ -12,15 +12,28 @@ public final class DisplayManager {
         this.manager = manager;
     }
 
-    public DisplayInfo getDisplayInfo() {
+    public DisplayInfo getDisplayInfo(int displayId) {
         try {
-            Object displayInfo = manager.getClass().getMethod("getDisplayInfo", int.class).invoke(manager, 0);
+            Object displayInfo = manager.getClass().getMethod("getDisplayInfo", int.class).invoke(manager, displayId);
+            if (displayInfo == null) {
+                return null;
+            }
             Class<?> cls = displayInfo.getClass();
             // width and height already take the rotation into account
             int width = cls.getDeclaredField("logicalWidth").getInt(displayInfo);
             int height = cls.getDeclaredField("logicalHeight").getInt(displayInfo);
             int rotation = cls.getDeclaredField("rotation").getInt(displayInfo);
-            return new DisplayInfo(new Size(width, height), rotation);
+            int layerStack = cls.getDeclaredField("layerStack").getInt(displayInfo);
+            int flags = cls.getDeclaredField("flags").getInt(displayInfo);
+            return new DisplayInfo(displayId, new Size(width, height), rotation, layerStack, flags);
+        } catch (Exception e) {
+            throw new AssertionError(e);
+        }
+    }
+
+    public int[] getDisplayIds() {
+        try {
+            return (int[]) manager.getClass().getMethod("getDisplayIds").invoke(manager);
         } catch (Exception e) {
             throw new AssertionError(e);
         }

server/src/main/java/com/genymobile/scrcpy/wrappers/InputManager.java

@@ -17,6 +17,8 @@ public final class InputManager {
     private final IInterface manager;
     private Method injectInputEventMethod;
 
+    private static Method setDisplayIdMethod;
+
     public InputManager(IInterface manager) {
         this.manager = manager;
     }
@@ -37,4 +39,22 @@ public final class InputManager {
             return false;
         }
     }
+
+    private static Method getSetDisplayIdMethod() throws NoSuchMethodException {
+        if (setDisplayIdMethod == null) {
+            setDisplayIdMethod = InputEvent.class.getMethod("setDisplayId", int.class);
+        }
+        return setDisplayIdMethod;
+    }
+
+    public static boolean setDisplayId(InputEvent inputEvent, int displayId) {
+        try {
+            Method method = getSetDisplayIdMethod();
+            method.invoke(inputEvent, displayId);
+            return true;
+        } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) {
+            Ln.e("Cannot associate a display id to the input event", e);
+            return false;
+        }
+    }
 }

server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java

@@ -6,7 +6,7 @@ import android.os.IInterface;
 
 import java.lang.reflect.Method;
 
-@SuppressLint("PrivateApi")
+@SuppressLint("PrivateApi,DiscouragedPrivateApi")
 public final class ServiceManager {
     private final Method getServiceMethod;
 

server/src/main/java/com/genymobile/scrcpy/wrappers/SurfaceControl.java

@@ -121,12 +121,14 @@ public final class SurfaceControl {
         return setDisplayPowerModeMethod;
     }
 
-    public static void setDisplayPowerMode(IBinder displayToken, int mode) {
+    public static boolean setDisplayPowerMode(IBinder displayToken, int mode) {
         try {
             Method method = getSetDisplayPowerModeMethod();
             method.invoke(null, displayToken, mode);
+            return true;
         } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) {
             Ln.e("Could not invoke method", e);
+            return false;
         }
     }
 

server/src/main/java/com/genymobile/scrcpy/wrappers/WindowManager.java

@@ -93,13 +93,13 @@ public final class WindowManager {
         }
     }
 
-    public void registerRotationWatcher(IRotationWatcher rotationWatcher) {
+    public void registerRotationWatcher(IRotationWatcher rotationWatcher, int displayId) {
         try {
             Class<?> cls = manager.getClass();
             try {
                 // display parameter added since this commit:
                 // https://android.googlesource.com/platform/frameworks/base/+/35fa3c26adcb5f6577849fd0df5228b1f67cf2c6%5E%21/#F1
-                cls.getMethod("watchRotation", IRotationWatcher.class, int.class).invoke(manager, rotationWatcher, 0);
+                cls.getMethod("watchRotation", IRotationWatcher.class, int.class).invoke(manager, rotationWatcher, displayId);
             } catch (NoSuchMethodException e) {
                 // old version
                 cls.getMethod("watchRotation", IRotationWatcher.class).invoke(manager, rotationWatcher);

server/src/test/java/com/genymobile/scrcpy/ControlMessageReaderTest.java

@@ -28,6 +28,9 @@ public class ControlMessageReaderTest {
         dos.writeInt(KeyEvent.META_CTRL_ON);
         byte[] packet = bos.toByteArray();
 
+        // The message type (1 byte) does not count
+        Assert.assertEquals(ControlMessageReader.INJECT_KEYCODE_PAYLOAD_LENGTH, packet.length - 1);
+
         reader.readFrom(new ByteArrayInputStream(packet));
         ControlMessage event = reader.next();
 
@@ -63,7 +66,7 @@ public class ControlMessageReaderTest {
         ByteArrayOutputStream bos = new ByteArrayOutputStream();
         DataOutputStream dos = new DataOutputStream(bos);
         dos.writeByte(ControlMessage.TYPE_INJECT_TEXT);
-        byte[] text = new byte[ControlMessageReader.TEXT_MAX_LENGTH];
+        byte[] text = new byte[ControlMessageReader.INJECT_TEXT_MAX_LENGTH];
         Arrays.fill(text, (byte) 'a');
         dos.writeShort(text.length);
         dos.write(text);
@@ -77,7 +80,6 @@ public class ControlMessageReaderTest {
     }
 
     @Test
-    @SuppressWarnings("checkstyle:MagicNumber")
     public void testParseTouchEvent() throws IOException {
         ControlMessageReader reader = new ControlMessageReader();
 
@@ -95,6 +97,9 @@ public class ControlMessageReaderTest {
 
         byte[] packet = bos.toByteArray();
 
+        // The message type (1 byte) does not count
+        Assert.assertEquals(ControlMessageReader.INJECT_TOUCH_EVENT_PAYLOAD_LENGTH, packet.length - 1);
+
         reader.readFrom(new ByteArrayInputStream(packet));
         ControlMessage event = reader.next();
 
@@ -110,7 +115,6 @@ public class ControlMessageReaderTest {
     }
 
     @Test
-    @SuppressWarnings("checkstyle:MagicNumber")
     public void testParseScrollEvent() throws IOException {
         ControlMessageReader reader = new ControlMessageReader();
 
@@ -126,6 +130,9 @@ public class ControlMessageReaderTest {
 
         byte[] packet = bos.toByteArray();
 
+        // The message type (1 byte) does not count
+        Assert.assertEquals(ControlMessageReader.INJECT_SCROLL_EVENT_PAYLOAD_LENGTH, packet.length - 1);
+
         reader.readFrom(new ByteArrayInputStream(packet));
         ControlMessage event = reader.next();
 
@@ -233,6 +240,9 @@ public class ControlMessageReaderTest {
 
         byte[] packet = bos.toByteArray();
 
+        // The message type (1 byte) does not count
+        Assert.assertEquals(ControlMessageReader.SET_SCREEN_POWER_MODE_PAYLOAD_LENGTH, packet.length - 1);
+
         reader.readFrom(new ByteArrayInputStream(packet));
         ControlMessage event = reader.next();
 

server/src/test/java/com/genymobile/scrcpy/StringUtilsTest.java

@@ -8,7 +8,6 @@ import java.nio.charset.StandardCharsets;
 public class StringUtilsTest {
 
     @Test
-    @SuppressWarnings("checkstyle:MagicNumber")
     public void testUtf8Truncate() {
         String s = "aÉbÔc";
         byte[] utf8 = s.getBytes(StandardCharsets.UTF_8);