/*
**
** Copyright 2007 The Android Open Source Project
**
** Licensed under the Apache License Version 2.0(the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing software
** distributed under the License is distributed on an "AS IS" BASIS
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#define LOG_TAG "EGLDisplaySurface"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <cutils/log.h>
#include <cutils/atomic.h>
#include <cutils/properties.h>
#include <hardware/copybit.h>
#include <ui/SurfaceComposerClient.h>
#include <ui/DisplayInfo.h>
#include <ui/Rect.h>
#include <ui/Region.h>
#include <ui/EGLDisplaySurface.h>
#if HAVE_ANDROID_OS
#include <linux/msm_mdp.h>
#endif
#include <EGL/egl.h>
#include <pixelflinger/format.h>
// ----------------------------------------------------------------------------
egl_native_window_t* android_createDisplaySurface()
{
egl_native_window_t* s = new android::EGLDisplaySurface();
s->memory_type = NATIVE_MEMORY_TYPE_GPU;
return s;
}
#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true ))
#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
EGLDisplaySurface::EGLDisplaySurface()
: EGLNativeSurface<EGLDisplaySurface>()
{
egl_native_window_t::version = sizeof(egl_native_window_t);
egl_native_window_t::ident = 0;
egl_native_window_t::incRef = &EGLDisplaySurface::hook_incRef;
egl_native_window_t::decRef = &EGLDisplaySurface::hook_decRef;
egl_native_window_t::swapBuffers = &EGLDisplaySurface::hook_swapBuffers;
egl_native_window_t::connect = 0;
egl_native_window_t::disconnect = 0;
mFb[0].data = 0;
mFb[1].data = 0;
mBlitEngine = 0;
egl_native_window_t::fd = mapFrameBuffer();
if (egl_native_window_t::fd >= 0) {
hw_module_t const* module;
if (hw_get_module(COPYBIT_HARDWARE_MODULE_ID, &module) == 0) {
copybit_open(module, &mBlitEngine);
}
const float in2mm = 25.4f;
float refreshRate = 1000000000000000LLU / (
float( mInfo.upper_margin + mInfo.lower_margin + mInfo.yres )
* ( mInfo.left_margin + mInfo.right_margin + mInfo.xres )
* mInfo.pixclock);
const GGLSurface& buffer = mFb[1 - mIndex];
egl_native_window_t::width = buffer.width;
egl_native_window_t::height = buffer.height;
egl_native_window_t::stride = buffer.stride;
egl_native_window_t::format = buffer.format;
egl_native_window_t::base = intptr_t(mFb[0].data);
egl_native_window_t::offset =
intptr_t(buffer.data) - egl_native_window_t::base;
egl_native_window_t::flags = 0;
egl_native_window_t::xdpi = (mInfo.xres * in2mm) / mInfo.width;
egl_native_window_t::ydpi = (mInfo.yres * in2mm) / mInfo.height;
egl_native_window_t::fps = refreshRate;
egl_native_window_t::memory_type = NATIVE_MEMORY_TYPE_FB;
// no error, set the magic word
egl_native_window_t::magic = 0x600913;
}
mSwapCount = -1;
mPageFlipCount = 0;
}
EGLDisplaySurface::~EGLDisplaySurface()
{
magic = 0;
copybit_close(mBlitEngine);
mBlitEngine = 0;
close(egl_native_window_t::fd);
munmap(mFb[0].data, mSize);
if (!(mFlags & PAGE_FLIP))
free((void*)mFb[1].data);
}
void EGLDisplaySurface::hook_incRef(NativeWindowType window) {
EGLDisplaySurface* that = static_cast<EGLDisplaySurface*>(window);
that->incStrong(that);
}
void EGLDisplaySurface::hook_decRef(NativeWindowType window) {
EGLDisplaySurface* that = static_cast<EGLDisplaySurface*>(window);
that->decStrong(that);
}
uint32_t EGLDisplaySurface::hook_swapBuffers(NativeWindowType window) {
EGLDisplaySurface* that = static_cast<EGLDisplaySurface*>(window);
return that->swapBuffers();
}
void EGLDisplaySurface::setSwapRectangle(int l, int t, int w, int h)
{
mInfo.reserved[0] = 0x54445055; // "UPDT";
mInfo.reserved[1] = (uint16_t)l | ((uint32_t)t << 16);
mInfo.reserved[2] = (uint16_t)(l+w) | ((uint32_t)(t+h) << 16);
}
uint32_t EGLDisplaySurface::swapBuffers()
{
#define SHOW_FPS 0
#if SHOW_FPS
nsecs_t now = systemTime();
if (mSwapCount == -1) {
mTime = now;
mSwapCount = 0;
mSleep = 0;
} else {
nsecs_t d = now-mTime;
if (d >= seconds(1)) {
double fps = (mSwapCount * double(seconds(1))) / double(d);
LOGD("%f fps, sleep=%d / frame",
fps, (int)ns2us(mSleep / mSwapCount));
mSwapCount = 0;
mTime = now;
mSleep = 0;
} else {
mSwapCount++;
}
}
#endif
/* If we can't do the page_flip, just copy the back buffer to the front */
if (!(mFlags & PAGE_FLIP)) {
memcpy(mFb[0].data, mFb[1].data, mInfo.xres*mInfo.yres*2);
return 0;
}
// do the actual flip
mIndex = 1 - mIndex;
mInfo.activate = FB_ACTIVATE_VBL;
mInfo.yoffset = mIndex ? mInfo.yres : 0;
if (ioctl(egl_native_window_t::fd, FBIOPUT_VSCREENINFO, &mInfo) == -1) {
LOGE("FBIOPUT_VSCREENINFO failed");
return 0;
}
/*
* this is a monstrous hack: Because the h/w accelerator is not able
* to render directly into the framebuffer, we need to copy its
* internal framebuffer out to the fb.
* oem[0] is used to access the fd of internal fb.
* All this is needed only in standalone mode, in SurfaceFlinger mode
* we control where the GPU renders.
* We do this only if we have copybit, since this hack is needed only
* with msm7k.
*/
if (egl_native_window_t::memory_type == NATIVE_MEMORY_TYPE_GPU && oem[0] && mBlitEngine) {
copybit_device_t *copybit = mBlitEngine;
copybit_rect_t sdrect = { 0, 0,
egl_native_window_t::width, egl_native_window_t::height };
copybit_image_t dst = {
egl_native_window_t::width,
egl_native_window_t::height,
egl_native_window_t::format,
egl_native_window_t::offset,
(void*)egl_native_window_t::base,
egl_native_window_t::fd
};
copybit_image_t src = {
egl_native_window_t::width,
egl_native_window_t::height,
egl_native_window_t::format, // XXX: use proper format
egl_native_window_t::offset,
(void*)egl_native_window_t::base, // XXX: use proper base
egl_native_window_t::oem[0]
};
region_iterator it(Region(Rect(
egl_native_window_t::width, egl_native_window_t::height)));
copybit->set_parameter(copybit, COPYBIT_TRANSFORM, 0);
copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, 0xFF);
copybit->set_parameter(copybit, COPYBIT_DITHER, COPYBIT_DISABLE);
copybit->stretch(copybit, &dst, &src, &sdrect, &sdrect, &it);
}
// update the address of the buffer to draw to next
const GGLSurface& buffer = mFb[1 - mIndex];
egl_native_window_t::offset =
intptr_t(buffer.data) - egl_native_window_t::base;
#if SHOW_FPS
mSleep += systemTime()-now;
#endif
mPageFlipCount++;
// We don't support screen-size changes for now
return 0;
}
int32_t EGLDisplaySurface::getPageFlipCount() const
{
return mPageFlipCount;
}
void EGLDisplaySurface::copyFrontToBack(const Region& copyback)
{
#if HAVE_ANDROID_OS
if (mBlitEngine) {
copybit_image_t dst = {
w: egl_native_window_t::stride,
h: egl_native_window_t::height,
format: egl_native_window_t::format,
offset: mFb[1-mIndex].data - mFb[0].data,
base: (void*)egl_native_window_t::base,
fd: egl_native_window_t::fd
};
copybit_image_t src = {
w: egl_native_window_t::stride,
h: egl_native_window_t::height,
format: egl_native_window_t::format,
offset: mFb[mIndex].data - mFb[0].data,
base: (void*)egl_native_window_t::base,
fd: egl_native_window_t::fd
};
region_iterator it(copyback);
mBlitEngine->blit(mBlitEngine, &dst, &src, &it);
} else
#endif
{
/* no extra copy needed since we copied back to front instead of
* flipping */
if (!(mFlags & PAGE_FLIP)) {
return;
}
Region::iterator iterator(copyback);
if (iterator) {
Rect r;
uint8_t* const screen_src = mFb[ mIndex].data;
uint8_t* const screen_dst = mFb[1-mIndex].data;
const size_t bpp = bytesPerPixel(egl_native_window_t::format);
const size_t bpr = egl_native_window_t::stride * bpp;
while (iterator.iterate(&r)) {
ssize_t h = r.bottom - r.top;
if (h) {
size_t size = (r.right - r.left) * bpp;
size_t o = (r.left + egl_native_window_t::stride * r.top) * bpp;
uint8_t* s = screen_src + o;
uint8_t* d = screen_dst + o;
if (size == bpr) {
size *= h;
h = 1;
}
do {
memcpy(d, s, size);
d += bpr;
s += bpr;
} while (--h > 0);
}
}
}
}
}
void EGLDisplaySurface::copyFrontToImage(const copybit_image_t& dst)
{
#if HAVE_ANDROID_OS
if (mBlitEngine) {
copybit_image_t src = {
w: egl_native_window_t::stride,
h: egl_native_window_t::height,
format: egl_native_window_t::format,
offset: mFb[mIndex].data - mFb[0].data,
base: (void*)egl_native_window_t::base,
fd: egl_native_window_t::fd
};
region_iterator it(Region(Rect(
egl_native_window_t::width, egl_native_window_t::height)));
mBlitEngine->blit(mBlitEngine, &dst, &src, &it);
} else
#endif
{
uint8_t* const screen_src = mFb[ mIndex].data;
const size_t bpp = bytesPerPixel(egl_native_window_t::format);
const size_t bpr = egl_native_window_t::stride * bpp;
memcpy((char*)dst.base + dst.offset, screen_src,
bpr*egl_native_window_t::height);
}
}
void EGLDisplaySurface::copyBackToImage(const copybit_image_t& dst)
{
#if HAVE_ANDROID_OS
if (mBlitEngine) {
copybit_image_t src = {
w: egl_native_window_t::stride,
h: egl_native_window_t::height,
format: egl_native_window_t::format,
offset: mFb[1-mIndex].data - mFb[0].data,
base: (void*)egl_native_window_t::base,
fd: egl_native_window_t::fd
};
region_iterator it(Region(Rect(
egl_native_window_t::width, egl_native_window_t::height)));
mBlitEngine->blit(mBlitEngine, &dst, &src, &it);
} else
#endif
{
uint8_t* const screen_src = mFb[1-mIndex].data;
const size_t bpp = bytesPerPixel(egl_native_window_t::format);
const size_t bpr = egl_native_window_t::stride * bpp;
memcpy((char*)dst.base + dst.offset, screen_src,
bpr*egl_native_window_t::height);
}
}
status_t EGLDisplaySurface::mapFrameBuffer()
{
char const * const device_template[] = {
"/dev/graphics/fb%u",
"/dev/fb%u",
0 };
int fd = -1;
int i=0;
char name[64];
while ((fd==-1) && device_template[i]) {
snprintf(name, 64, device_template[i], 0);
fd = open(name, O_RDWR, 0);
i++;
}
if (fd < 0)
return -errno;
struct fb_fix_screeninfo finfo;
if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
return -errno;
struct fb_var_screeninfo info;
if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
return -errno;
info.reserved[0] = 0;
info.reserved[1] = 0;
info.reserved[2] = 0;
info.xoffset = 0;
info.yoffset = 0;
info.yres_virtual = info.yres * 2;
info.bits_per_pixel = 16;
/* Explicitly request 5/6/5 */
info.red.offset = 11;
info.red.length = 5;
info.green.offset = 5;
info.green.length = 6;
info.blue.offset = 0;
info.blue.length = 5;
info.transp.offset = 0;
info.transp.length = 0;
info.activate = FB_ACTIVATE_NOW;
uint32_t flags = PAGE_FLIP;
if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) {
info.yres_virtual = info.yres;
flags &= ~PAGE_FLIP;
LOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported");
}
if (info.yres_virtual < info.yres * 2) {
info.yres_virtual = info.yres;
flags &= ~PAGE_FLIP;
LOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
info.yres_virtual, info.yres*2);
}
if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
return -errno;
int refreshRate = 1000000000000000LLU /
(
uint64_t( info.upper_margin + info.lower_margin + info.yres )
* ( info.left_margin + info.right_margin + info.xres )
* info.pixclock
);
if (refreshRate == 0) {
// bleagh, bad info from the driver
refreshRate = 60*1000; // 60 Hz
}
if (int(info.width) <= 0 || int(info.height) <= 0) {
// the driver doesn't return that information
// default to 160 dpi
info.width = ((info.xres * 25.4f)/160.0f + 0.5f);
info.height = ((info.yres * 25.4f)/160.0f + 0.5f);
}
float xdpi = (info.xres * 25.4f) / info.width;
float ydpi = (info.yres * 25.4f) / info.height;
float fps = refreshRate / 1000.0f;
LOGI( "using (fd=%d)\n"
"id = %s\n"
"xres = %d px\n"
"yres = %d px\n"
"xres_virtual = %d px\n"
"yres_virtual = %d px\n"
"bpp = %d\n"
"r = %2u:%u\n"
"g = %2u:%u\n"
"b = %2u:%u\n",
fd,
finfo.id,
info.xres,
info.yres,
info.xres_virtual,
info.yres_virtual,
info.bits_per_pixel,
info.red.offset, info.red.length,
info.green.offset, info.green.length,
info.blue.offset, info.blue.length
);
LOGI( "width = %d mm (%f dpi)\n"
"height = %d mm (%f dpi)\n"
"refresh rate = %.2f Hz\n",
info.width, xdpi,
info.height, ydpi,
fps
);
if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
return -errno;
if (finfo.smem_len <= 0)
return -errno;
/*
* Open and map the display.
*/
void* buffer = (uint16_t*) mmap(
0, finfo.smem_len,
PROT_READ | PROT_WRITE,
MAP_SHARED,
fd, 0);
if (buffer == MAP_FAILED)
return -errno;
// at least for now, always clear the fb
memset(buffer, 0, finfo.smem_len);
uint8_t* offscreen[2];
offscreen[0] = (uint8_t*)buffer;
if (flags & PAGE_FLIP) {
offscreen[1] = (uint8_t*)buffer + finfo.line_length*info.yres;
} else {
offscreen[1] = (uint8_t*)malloc(finfo.smem_len);
if (offscreen[1] == 0) {
munmap(buffer, finfo.smem_len);
return NO_MEMORY;
}
}
mFlags = flags;
mInfo = info;
mFinfo = finfo;
mSize = finfo.smem_len;
mIndex = 0;
for (int i=0 ; i<2 ; i++) {
mFb[i].version = sizeof(GGLSurface);
mFb[i].width = info.xres;
mFb[i].height = info.yres;
mFb[i].stride = finfo.line_length / (info.bits_per_pixel >> 3);
mFb[i].data = (GGLubyte*)(offscreen[i]);
mFb[i].format = GGL_PIXEL_FORMAT_RGB_565;
}
return fd;
}
// ----------------------------------------------------------------------------
}; // namespace android
// ----------------------------------------------------------------------------