bug:16852257
Use pow(alpha, 1.5) to avoid harsh edges on shadow alpha ramps.
Also adjusts shadow constants to compensate.
Change-Id: I5869956d7d292db2a8e496bc320084b6d64c3fb7
bug:16804363
Since dist can be in the 1000s of pixels, and length() may square it
in its current precision, scale the value down significantly first,
since final precision isn't very important.
Change-Id: Id20f7a49d6171355c8e242442c2b5083f746dca3
bug:4351353
bug:8185479
Point tessellation is similar to line special case, except that we
only tessellate one point (as a circle or rect) and duplicate it
across other instances.
Additionally:
Fixes square caps for AA=false lines
Cleanup in CanvasCompare, disabling interpolation on zoomed-in
comparison view
Change-Id: I0756fcc4b20f77878fed0d8057297c80e82ed9dc
The counter can be enabled by setting the system property called
debug.hwui.overdraw to the string "count". If the string is set
to "show", overdraw will be highlighted on screen instead of
printing out a simple counter.
Change-Id: I9a9c970d54bffab43138bbb7682f6c04bc2c40bd
This is a more elegant way to sample from a float alpha texture.
Instead of sampling from the red channel in the fragment shader
we can set the alpha channel swizzle to redirect it to the
red channel. This lets us sample from the alpha channel in the
fragment shader and get the correct value.
Change-Id: I95bbf7a82964e1bf42c0fee1b782b6bdbbcef618
Float textures offer better precision for dithering.
In addition this change removes two uniforms from gradient shaders.
These uniforms were used to dither gradients but their value is
a build time constant. Instead we hardcode the value directly in
the shader source at compile time.
Change-Id: I05e9fd3eef93771843bbd91b453274452dfaefee
Add a key manipulation that makes black text/paths use the standard
simple bitmap/patch shader, since they are the same. Previously we'd
create a separate shader for each because the keys differed, even
though the shaders were functionally equivalent.
Also fixes some issues around setting DEBUG_PROGRAM
Change-Id: I0c77c684d58da03501ee9ab8239c7d4a70fd6b5c
This change adds a new property called "debug.hwui.show_stencil_clip"
that accepts the following values:
- "highlight", colorizes in green any drawing command that's tested
against a non-rectangular clip region
- "region", shows the non-rectangular clip region in blue every time
it is used
- "hide", default value, nothing is shown
Change-Id: I83c8602310edc4aaeb8b905371cdd185b17d32b5
bug:7117155
bug:8114304
Currently used for lines (with and without AA) and arcs with useCenter=false
Also removes 0.375, 0.375 offset for AA lines
Change-Id: Ic8ace418739344db1e2814edf65253fe7448b0b0
Bug #7239634
This change passes two matrices to the vertex shader instead of one.
We used to compute the final MVP matrix on the CPU to minimize the
number of operations in the vertex shaders. Shader compilers are
however smart enough to perform this optimization for us. Since we
need the MV matrix to properly compute gradients dithering, this
change splits the MVP matrix into two. This has the advantage of
removing one matrix multiplication per drawing operation on the
CPU.
The SGX 540 shader compiler produces the same number of instructions
in both cases. There is no penalty hit with having two matrices
instead of one. We also send so few vertices per frame that it
does not matter very much.
Change-Id: I17d47ac4772615418e0e1885b97493d31435a936
Bug #7222476
There were two issues:
- Blending was ignored with color filters
- The addition vector of a color filter was treated as integer values
instead of float values
Change-Id: Id94065704a30ee8aaaa5724a9f3a3cff7c50ced7
It's faster to compute a dither calculation in the vertex shader and use
a varying (letting the GPU interpolate the fragment values) than to perform
that calculation in the fragment shader as part of a texture lookup.
Issue #7207600 Prime mr1 shader performance issues
Issue #7158326 Bad framerates on MR1 (Mako, Manta, Prime)
Change-Id: I15789582a6e9e2d8b9dd22aa5b0f72f0ba1cce7f
Modulation is normally enabled in a shader when drawing with an alpha
mask (A8 texture.) Modulation is used to do one of two things:
- Colorize the primitive (to draw text in red for instance)
- Apply extra translucency (50% translucent circle filled with a bitmap)
The current implementation has four issues:
1. Unnecessary work is performed by assigning the modulation color
to vec4 fragColor early in the shader
2. The modulation color's alpha is applied twice when the primitive
is drawn with an SkShader
3. The decision to modulate is wrong and triggers when any of the
RGB channels is < 1.0. Only the alpha channel needs to be taken
into account to make the decision
4. Gamma correction is not applied properly
This change addresses all four issues above.
Change-Id: I73fcc74efc4b094bf2d1b835f10ffaa2ea4b9eb9
Instead of calculating opacity from relative position in the shader, use a
shader varying to do this computation for us.
bug:5045101
Also adds a test to HwAccelerationTest to show incorrect antialiasing in
scaled drawAARect / boundarySize calculation.
Change-Id: Icdc41acb01dc10ce354834f8389a5aed2f439162
To enable it, the system property ro.hwui.text_gamma_shader must be
set to true. For testing, DEBUG_FONT_RENDERER_FORCE_SHADER_GAMMA
can be set to 1 in libhwui/Debug.h.
Change-Id: If345c6b71b67ecf1ef2e8847b71f30f3ef251a27
Bug #4343984
TextureView can be used to render media content (video, OpenGL,
RenderScript) inside a View.
The key difference with SurfaceView is that TextureView does
not create a new Surface. This gives the ability to seamlessly
transform, animate, fade, etc. a TextureView, which was hard
if not impossible to do with a SurfaceView.
A TextureView also interacts perfectly with ScrollView,
ListView, etc. It allows application to embed media content
in a much more flexible way than before.
For instance, to render the camera preview at 50% opacity,
all you need to do is the following:
mTextureView.setAlpha(0.5f);
Camera c = Camera.open();
c.setPreviewTexture(mTextureView.getSurfaceTexture());
c.startPreview();
TextureView uses a SurfaceTexture to get the job done. More
APIs are required to make it easy to create OpenGL contexts
for a TextureView. It can currently be done with a bit of
JNI code.
Change-Id: Iaa7953097ab5beb8437bcbbfa03b2df5b7f80cd7
Bug #4318323
This change also fixes the fact that shaders were not modulated
by the paint's color when drawing paths.
Change-Id: Id88804143aea06c895d4cbcdbe106d660230aa5a
Draw anti-aliased lines with OpenGL by constructing a quad with
a border that fades out (to mimic fragment coverage).
Change-Id: Ib81a3e62d663acdf1b46b401ac4aa7ee9855cc7e
This fixes only linear gradients. Sweep and radial gradients, as well as
bitmap shaders, will be fixed in a future commit.
Change-Id: I4eee4ff62e9bbf3b9339fc111a780167449ecfef
This change also adds full support for local transformation matrices on
sweep and radial gradients.
Change-Id: Id8773bc0766575190e3f3d51984fc5e57b266c3f
