669b15a935
This is fixed in Skia by passing the appropriate flag when the shader is generated. The fix in HWUI is to reverse the premultiplication and interpolation steps. Test: bit CtsUiRenderingTestCases:.testclasses.ShaderTests Bug: 34323783 Change-Id: I3417141949f62fcc696b6d8213a4b446d7d0cbf8
903 lines
33 KiB
C++
903 lines
33 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <utils/String8.h>
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#include "Caches.h"
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#include "ProgramCache.h"
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#include "Properties.h"
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namespace android {
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namespace uirenderer {
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///////////////////////////////////////////////////////////////////////////////
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// Defines
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///////////////////////////////////////////////////////////////////////////////
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#define MODULATE_OP_NO_MODULATE 0
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#define MODULATE_OP_MODULATE 1
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#define MODULATE_OP_MODULATE_A8 2
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#define STR(x) STR1(x)
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#define STR1(x) #x
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///////////////////////////////////////////////////////////////////////////////
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// Vertex shaders snippets
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///////////////////////////////////////////////////////////////////////////////
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const char* gVS_Header_Start =
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"#version 100\n"
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"attribute vec4 position;\n";
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const char* gVS_Header_Attributes_TexCoords =
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"attribute vec2 texCoords;\n";
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const char* gVS_Header_Attributes_Colors =
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"attribute vec4 colors;\n";
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const char* gVS_Header_Attributes_VertexAlphaParameters =
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"attribute float vtxAlpha;\n";
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const char* gVS_Header_Uniforms_TextureTransform =
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"uniform mat4 mainTextureTransform;\n";
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const char* gVS_Header_Uniforms =
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"uniform mat4 projection;\n" \
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"uniform mat4 transform;\n";
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const char* gVS_Header_Uniforms_HasGradient =
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"uniform mat4 screenSpace;\n";
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const char* gVS_Header_Uniforms_HasBitmap =
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"uniform mat4 textureTransform;\n"
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"uniform mediump vec2 textureDimension;\n";
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const char* gVS_Header_Uniforms_HasRoundRectClip =
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"uniform mat4 roundRectInvTransform;\n";
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const char* gVS_Header_Varyings_HasTexture =
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"varying vec2 outTexCoords;\n";
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const char* gVS_Header_Varyings_HasColors =
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"varying vec4 outColors;\n";
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const char* gVS_Header_Varyings_HasVertexAlpha =
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"varying float alpha;\n";
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const char* gVS_Header_Varyings_HasBitmap =
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"varying highp vec2 outBitmapTexCoords;\n";
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const char* gVS_Header_Varyings_HasGradient[6] = {
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// Linear
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"varying highp vec2 linear;\n",
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"varying float linear;\n",
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// Circular
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"varying highp vec2 circular;\n",
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"varying highp vec2 circular;\n",
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// Sweep
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"varying highp vec2 sweep;\n",
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"varying highp vec2 sweep;\n",
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};
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const char* gVS_Header_Varyings_HasRoundRectClip =
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"varying highp vec2 roundRectPos;\n";
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const char* gVS_Main =
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"\nvoid main(void) {\n";
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const char* gVS_Main_OutTexCoords =
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" outTexCoords = texCoords;\n";
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const char* gVS_Main_OutColors =
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" outColors = colors;\n";
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const char* gVS_Main_OutTransformedTexCoords =
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" outTexCoords = (mainTextureTransform * vec4(texCoords, 0.0, 1.0)).xy;\n";
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const char* gVS_Main_OutGradient[6] = {
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// Linear
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" linear = vec2((screenSpace * position).x, 0.5);\n",
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" linear = (screenSpace * position).x;\n",
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// Circular
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" circular = (screenSpace * position).xy;\n",
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" circular = (screenSpace * position).xy;\n",
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// Sweep
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" sweep = (screenSpace * position).xy;\n",
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" sweep = (screenSpace * position).xy;\n"
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};
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const char* gVS_Main_OutBitmapTexCoords =
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" outBitmapTexCoords = (textureTransform * position).xy * textureDimension;\n";
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const char* gVS_Main_Position =
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" vec4 transformedPosition = projection * transform * position;\n"
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" gl_Position = transformedPosition;\n";
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const char* gVS_Main_VertexAlpha =
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" alpha = vtxAlpha;\n";
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const char* gVS_Main_HasRoundRectClip =
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" roundRectPos = (roundRectInvTransform * transformedPosition).xy;\n";
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const char* gVS_Footer =
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"}\n\n";
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///////////////////////////////////////////////////////////////////////////////
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// Fragment shaders snippets
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///////////////////////////////////////////////////////////////////////////////
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const char* gFS_Header_Start =
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"#version 100\n";
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const char* gFS_Header_Extension_FramebufferFetch =
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"#extension GL_NV_shader_framebuffer_fetch : enable\n\n";
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const char* gFS_Header_Extension_ExternalTexture =
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"#extension GL_OES_EGL_image_external : require\n\n";
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const char* gFS_Header =
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"precision mediump float;\n\n";
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const char* gFS_Uniforms_Color =
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"uniform vec4 color;\n";
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const char* gFS_Uniforms_TextureSampler =
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"uniform sampler2D baseSampler;\n";
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const char* gFS_Uniforms_ExternalTextureSampler =
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"uniform samplerExternalOES baseSampler;\n";
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const char* gFS_Uniforms_GradientSampler[2] = {
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"uniform vec2 screenSize;\n"
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"uniform sampler2D gradientSampler;\n",
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"uniform vec2 screenSize;\n"
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"uniform vec4 startColor;\n"
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"uniform vec4 endColor;\n"
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};
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const char* gFS_Uniforms_BitmapSampler =
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"uniform sampler2D bitmapSampler;\n";
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const char* gFS_Uniforms_BitmapExternalSampler =
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"uniform samplerExternalOES bitmapSampler;\n";
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const char* gFS_Uniforms_ColorOp[3] = {
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// None
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"",
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// Matrix
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"uniform mat4 colorMatrix;\n"
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"uniform vec4 colorMatrixVector;\n",
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// PorterDuff
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"uniform vec4 colorBlend;\n"
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};
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const char* gFS_Uniforms_HasRoundRectClip =
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"uniform vec4 roundRectInnerRectLTRB;\n"
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"uniform float roundRectRadius;\n";
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const char* gFS_Uniforms_ColorSpaceConversion =
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// TODO: Should we use a 3D LUT to combine the matrix and transfer functions?
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// 32x32x32 fp16 LUTs (for scRGB output) are large and heavy to generate...
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"uniform mat3 colorSpaceMatrix;\n";
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const char* gFS_Uniforms_TransferFunction[4] = {
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// In this order: g, a, b, c, d, e, f
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// See ColorSpace::TransferParameters
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// We'll use hardware sRGB conversion as much as possible
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"",
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"uniform float transferFunction[7];\n",
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"uniform float transferFunction[5];\n",
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"uniform float transferFunctionGamma;\n"
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};
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const char* gFS_OETF[2] = {
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R"__SHADER__(
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vec4 OETF(const vec4 linear) {
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return linear;
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}
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)__SHADER__",
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// We expect linear data to be scRGB so we mirror the gamma function
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R"__SHADER__(
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vec4 OETF(const vec4 linear) {
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return vec4(sign(linear.rgb) * OETF_sRGB(abs(linear.rgb)), linear.a);
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}
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)__SHADER__"
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};
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const char* gFS_ColorConvert[3] = {
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// Just OETF
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R"__SHADER__(
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vec4 colorConvert(const vec4 color) {
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return OETF(color);
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}
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)__SHADER__",
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// Full color conversion for opaque bitmaps
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R"__SHADER__(
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vec4 colorConvert(const vec4 color) {
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return OETF(vec4(colorSpaceMatrix * EOTF_Parametric(color.rgb), color.a));
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}
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)__SHADER__",
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// Full color conversion for translucent bitmaps
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// Note: 0.5/256=0.0019
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R"__SHADER__(
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vec4 colorConvert(in vec4 color) {
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color.rgb /= color.a + 0.0019;
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color = OETF(vec4(colorSpaceMatrix * EOTF_Parametric(color.rgb), color.a));
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color.rgb *= color.a + 0.0019;
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return color;
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}
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)__SHADER__",
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};
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const char* gFS_sRGB_TransferFunctions = R"__SHADER__(
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float OETF_sRGB(const float linear) {
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// IEC 61966-2-1:1999
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return linear <= 0.0031308 ? linear * 12.92 : (pow(linear, 1.0 / 2.4) * 1.055) - 0.055;
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}
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vec3 OETF_sRGB(const vec3 linear) {
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return vec3(OETF_sRGB(linear.r), OETF_sRGB(linear.g), OETF_sRGB(linear.b));
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}
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float EOTF_sRGB(float srgb) {
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// IEC 61966-2-1:1999
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return srgb <= 0.04045 ? srgb / 12.92 : pow((srgb + 0.055) / 1.055, 2.4);
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}
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)__SHADER__";
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const char* gFS_TransferFunction[4] = {
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// Conversion done by the texture unit (sRGB)
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R"__SHADER__(
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vec3 EOTF_Parametric(const vec3 x) {
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return x;
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}
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)__SHADER__",
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// Full transfer function
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// TODO: We should probably use a 1D LUT (256x1 with texelFetch() since input is 8 bit)
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// TODO: That would cause 3 dependent texture fetches. Is it worth it?
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R"__SHADER__(
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float EOTF_Parametric(float x) {
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return x <= transferFunction[4]
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? transferFunction[3] * x + transferFunction[6]
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: pow(transferFunction[1] * x + transferFunction[2], transferFunction[0])
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+ transferFunction[5];
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}
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vec3 EOTF_Parametric(const vec3 x) {
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return vec3(EOTF_Parametric(x.r), EOTF_Parametric(x.g), EOTF_Parametric(x.b));
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}
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)__SHADER__",
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// Limited transfer function, e = f = 0.0
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R"__SHADER__(
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float EOTF_Parametric(float x) {
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return x <= transferFunction[4]
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? transferFunction[3] * x
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: pow(transferFunction[1] * x + transferFunction[2], transferFunction[0]);
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}
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vec3 EOTF_Parametric(const vec3 x) {
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return vec3(EOTF_Parametric(x.r), EOTF_Parametric(x.g), EOTF_Parametric(x.b));
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}
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)__SHADER__",
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// Gamma transfer function, e = f = 0.0
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R"__SHADER__(
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vec3 EOTF_Parametric(const vec3 x) {
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return vec3(pow(x.r, transferFunctionGamma),
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pow(x.g, transferFunctionGamma),
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pow(x.b, transferFunctionGamma));
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}
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)__SHADER__"
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};
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// Dithering must be done in the quantization space
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// When we are writing to an sRGB framebuffer, we must do the following:
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// EOTF(OETF(color) + dither)
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// The dithering pattern is generated with a triangle noise generator in the range [-1.0,1.0]
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// TODO: Handle linear fp16 render targets
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const char* gFS_GradientFunctions = R"__SHADER__(
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float triangleNoise(const highp vec2 n) {
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highp vec2 p = fract(n * vec2(5.3987, 5.4421));
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p += dot(p.yx, p.xy + vec2(21.5351, 14.3137));
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highp float xy = p.x * p.y;
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return fract(xy * 95.4307) + fract(xy * 75.04961) - 1.0;
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}
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)__SHADER__";
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const char* gFS_GradientPreamble[2] = {
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// Linear framebuffer
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R"__SHADER__(
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vec4 dither(const vec4 color) {
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return color + (triangleNoise(gl_FragCoord.xy * screenSize.xy) / 255.0);
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}
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)__SHADER__",
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// sRGB framebuffer
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R"__SHADER__(
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vec4 dither(const vec4 color) {
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vec3 dithered = sqrt(color.rgb) + (triangleNoise(gl_FragCoord.xy * screenSize.xy) / 255.0);
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return vec4(dithered * dithered, color.a);
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}
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)__SHADER__",
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};
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// Uses luminance coefficients from Rec.709 to choose the appropriate gamma
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// The gamma() function assumes that bright text will be displayed on a dark
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// background and that dark text will be displayed on bright background
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// The gamma coefficient is chosen to thicken or thin the text accordingly
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// The dot product used to compute the luminance could be approximated with
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// a simple max(color.r, color.g, color.b)
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const char* gFS_Gamma_Preamble = R"__SHADER__(
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#define GAMMA (%.2f)
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#define GAMMA_INV (%.2f)
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float gamma(float a, const vec3 color) {
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float luminance = dot(color, vec3(0.2126, 0.7152, 0.0722));
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return pow(a, luminance < 0.5 ? GAMMA_INV : GAMMA);
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}
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)__SHADER__";
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const char* gFS_Main =
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"\nvoid main(void) {\n"
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" vec4 fragColor;\n";
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const char* gFS_Main_AddDither =
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" fragColor = dither(fragColor);\n";
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// General case
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const char* gFS_Main_FetchColor =
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" fragColor = color;\n";
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const char* gFS_Main_ModulateColor =
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" fragColor *= color.a;\n";
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const char* gFS_Main_ApplyVertexAlphaLinearInterp =
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" fragColor *= alpha;\n";
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const char* gFS_Main_ApplyVertexAlphaShadowInterp =
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// map alpha through shadow alpha sampler
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" fragColor *= texture2D(baseSampler, vec2(alpha, 0.5)).a;\n";
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const char* gFS_Main_FetchTexture[2] = {
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// Don't modulate
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" fragColor = colorConvert(texture2D(baseSampler, outTexCoords));\n",
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// Modulate
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" fragColor = color * colorConvert(texture2D(baseSampler, outTexCoords));\n"
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};
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const char* gFS_Main_FetchA8Texture[4] = {
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// Don't modulate
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" fragColor = texture2D(baseSampler, outTexCoords);\n",
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" fragColor = texture2D(baseSampler, outTexCoords);\n",
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// Modulate
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" fragColor = color * texture2D(baseSampler, outTexCoords).a;\n",
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" fragColor = color * gamma(texture2D(baseSampler, outTexCoords).a, color.rgb);\n",
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};
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const char* gFS_Main_FetchGradient[6] = {
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// Linear
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" vec4 gradientColor = texture2D(gradientSampler, linear);\n",
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" vec4 gradientColor = mix(startColor, endColor, clamp(linear, 0.0, 1.0));\n",
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// Circular
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" vec4 gradientColor = texture2D(gradientSampler, vec2(length(circular), 0.5));\n",
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" vec4 gradientColor = mix(startColor, endColor, clamp(length(circular), 0.0, 1.0));\n",
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// Sweep
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" highp float index = atan(sweep.y, sweep.x) * 0.15915494309; // inv(2 * PI)\n"
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" vec4 gradientColor = texture2D(gradientSampler, vec2(index - floor(index), 0.5));\n",
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" highp float index = atan(sweep.y, sweep.x) * 0.15915494309; // inv(2 * PI)\n"
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" vec4 gradientColor = mix(startColor, endColor, clamp(index - floor(index), 0.0, 1.0));\n"
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};
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const char* gFS_Main_FetchBitmap =
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" vec4 bitmapColor = colorConvert(texture2D(bitmapSampler, outBitmapTexCoords));\n";
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const char* gFS_Main_FetchBitmapNpot =
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" vec4 bitmapColor = colorConvert(texture2D(bitmapSampler, wrap(outBitmapTexCoords)));\n";
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const char* gFS_Main_BlendShadersBG =
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" fragColor = blendShaders(gradientColor, bitmapColor)";
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const char* gFS_Main_BlendShadersGB =
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" fragColor = blendShaders(bitmapColor, gradientColor)";
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const char* gFS_Main_BlendShaders_Modulate[6] = {
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// Don't modulate
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";\n",
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";\n",
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// Modulate
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" * color.a;\n",
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" * color.a;\n",
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// Modulate with alpha 8 texture
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" * texture2D(baseSampler, outTexCoords).a;\n",
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" * gamma(texture2D(baseSampler, outTexCoords).a, color.rgb);\n",
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};
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const char* gFS_Main_GradientShader_Modulate[6] = {
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// Don't modulate
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" fragColor = gradientColor;\n",
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" fragColor = gradientColor;\n",
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// Modulate
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" fragColor = gradientColor * color.a;\n",
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" fragColor = gradientColor * color.a;\n",
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// Modulate with alpha 8 texture
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" fragColor = gradientColor * texture2D(baseSampler, outTexCoords).a;\n",
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" fragColor = gradientColor * gamma(texture2D(baseSampler, outTexCoords).a, gradientColor.rgb);\n",
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};
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const char* gFS_Main_BitmapShader_Modulate[6] = {
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// Don't modulate
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" fragColor = bitmapColor;\n",
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" fragColor = bitmapColor;\n",
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// Modulate
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" fragColor = bitmapColor * color.a;\n",
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" fragColor = bitmapColor * color.a;\n",
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// Modulate with alpha 8 texture
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" fragColor = bitmapColor * texture2D(baseSampler, outTexCoords).a;\n",
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" fragColor = bitmapColor * gamma(texture2D(baseSampler, outTexCoords).a, bitmapColor.rgb);\n",
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};
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const char* gFS_Main_FragColor =
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" gl_FragColor = fragColor;\n";
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const char* gFS_Main_FragColor_HasColors =
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" gl_FragColor *= outColors;\n";
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const char* gFS_Main_FragColor_Blend =
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" gl_FragColor = blendFramebuffer(fragColor, gl_LastFragColor);\n";
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const char* gFS_Main_FragColor_Blend_Swap =
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" gl_FragColor = blendFramebuffer(gl_LastFragColor, fragColor);\n";
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const char* gFS_Main_ApplyColorOp[3] = {
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// None
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"",
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// Matrix
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" fragColor.rgb /= (fragColor.a + 0.0019);\n" // un-premultiply
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" fragColor *= colorMatrix;\n"
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" fragColor += colorMatrixVector;\n"
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" fragColor.rgb *= (fragColor.a + 0.0019);\n", // re-premultiply
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// PorterDuff
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" fragColor = blendColors(colorBlend, fragColor);\n"
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};
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// Note: LTRB -> xyzw
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const char* gFS_Main_FragColor_HasRoundRectClip =
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" mediump vec2 fragToLT = roundRectInnerRectLTRB.xy - roundRectPos;\n"
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" mediump vec2 fragFromRB = roundRectPos - roundRectInnerRectLTRB.zw;\n"
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// divide + multiply by 128 to avoid falling out of range in length() function
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" mediump vec2 dist = max(max(fragToLT, fragFromRB), vec2(0.0, 0.0)) / 128.0;\n"
|
|
" mediump float linearDist = roundRectRadius - (length(dist) * 128.0);\n"
|
|
" gl_FragColor *= clamp(linearDist, 0.0, 1.0);\n";
|
|
|
|
const char* gFS_Main_DebugHighlight =
|
|
" gl_FragColor.rgb = vec3(0.0, gl_FragColor.a, 0.0);\n";
|
|
const char* gFS_Footer =
|
|
"}\n\n";
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// PorterDuff snippets
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
const char* gBlendOps[18] = {
|
|
// Clear
|
|
"return vec4(0.0, 0.0, 0.0, 0.0);\n",
|
|
// Src
|
|
"return src;\n",
|
|
// Dst
|
|
"return dst;\n",
|
|
// SrcOver
|
|
"return src + dst * (1.0 - src.a);\n",
|
|
// DstOver
|
|
"return dst + src * (1.0 - dst.a);\n",
|
|
// SrcIn
|
|
"return src * dst.a;\n",
|
|
// DstIn
|
|
"return dst * src.a;\n",
|
|
// SrcOut
|
|
"return src * (1.0 - dst.a);\n",
|
|
// DstOut
|
|
"return dst * (1.0 - src.a);\n",
|
|
// SrcAtop
|
|
"return vec4(src.rgb * dst.a + (1.0 - src.a) * dst.rgb, dst.a);\n",
|
|
// DstAtop
|
|
"return vec4(dst.rgb * src.a + (1.0 - dst.a) * src.rgb, src.a);\n",
|
|
// Xor
|
|
"return vec4(src.rgb * (1.0 - dst.a) + (1.0 - src.a) * dst.rgb, "
|
|
"src.a + dst.a - 2.0 * src.a * dst.a);\n",
|
|
// Plus
|
|
"return min(src + dst, 1.0);\n",
|
|
// Modulate
|
|
"return src * dst;\n",
|
|
// Screen
|
|
"return src + dst - src * dst;\n",
|
|
// Overlay
|
|
"return clamp(vec4(mix("
|
|
"2.0 * src.rgb * dst.rgb + src.rgb * (1.0 - dst.a) + dst.rgb * (1.0 - src.a), "
|
|
"src.a * dst.a - 2.0 * (dst.a - dst.rgb) * (src.a - src.rgb) + src.rgb * (1.0 - dst.a) + dst.rgb * (1.0 - src.a), "
|
|
"step(dst.a, 2.0 * dst.rgb)), "
|
|
"src.a + dst.a - src.a * dst.a), 0.0, 1.0);\n",
|
|
// Darken
|
|
"return vec4(src.rgb * (1.0 - dst.a) + (1.0 - src.a) * dst.rgb + "
|
|
"min(src.rgb * dst.a, dst.rgb * src.a), src.a + dst.a - src.a * dst.a);\n",
|
|
// Lighten
|
|
"return vec4(src.rgb * (1.0 - dst.a) + (1.0 - src.a) * dst.rgb + "
|
|
"max(src.rgb * dst.a, dst.rgb * src.a), src.a + dst.a - src.a * dst.a);\n",
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Constructors/destructors
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
ProgramCache::ProgramCache(Extensions& extensions)
|
|
: mHasES3(extensions.getMajorGlVersion() >= 3)
|
|
, mHasLinearBlending(extensions.hasLinearBlending()) {
|
|
}
|
|
|
|
ProgramCache::~ProgramCache() {
|
|
clear();
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Cache management
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
void ProgramCache::clear() {
|
|
PROGRAM_LOGD("Clearing program cache");
|
|
mCache.clear();
|
|
}
|
|
|
|
Program* ProgramCache::get(const ProgramDescription& description) {
|
|
programid key = description.key();
|
|
if (key == (PROGRAM_KEY_TEXTURE | PROGRAM_KEY_A8_TEXTURE)) {
|
|
// program for A8, unmodulated, texture w/o shader (black text/path textures) is equivalent
|
|
// to standard texture program (bitmaps, patches). Consider them equivalent.
|
|
key = PROGRAM_KEY_TEXTURE;
|
|
}
|
|
|
|
auto iter = mCache.find(key);
|
|
Program* program = nullptr;
|
|
if (iter == mCache.end()) {
|
|
description.log("Could not find program");
|
|
program = generateProgram(description, key);
|
|
mCache[key] = std::unique_ptr<Program>(program);
|
|
} else {
|
|
program = iter->second.get();
|
|
}
|
|
return program;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Program generation
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
Program* ProgramCache::generateProgram(const ProgramDescription& description, programid key) {
|
|
String8 vertexShader = generateVertexShader(description);
|
|
String8 fragmentShader = generateFragmentShader(description);
|
|
|
|
return new Program(description, vertexShader.string(), fragmentShader.string());
|
|
}
|
|
|
|
static inline size_t gradientIndex(const ProgramDescription& description) {
|
|
return description.gradientType * 2 + description.isSimpleGradient;
|
|
}
|
|
|
|
String8 ProgramCache::generateVertexShader(const ProgramDescription& description) {
|
|
// Add attributes
|
|
String8 shader(gVS_Header_Start);
|
|
if (description.hasTexture || description.hasExternalTexture) {
|
|
shader.append(gVS_Header_Attributes_TexCoords);
|
|
}
|
|
if (description.hasVertexAlpha) {
|
|
shader.append(gVS_Header_Attributes_VertexAlphaParameters);
|
|
}
|
|
if (description.hasColors) {
|
|
shader.append(gVS_Header_Attributes_Colors);
|
|
}
|
|
// Uniforms
|
|
shader.append(gVS_Header_Uniforms);
|
|
if (description.hasTextureTransform) {
|
|
shader.append(gVS_Header_Uniforms_TextureTransform);
|
|
}
|
|
if (description.hasGradient) {
|
|
shader.append(gVS_Header_Uniforms_HasGradient);
|
|
}
|
|
if (description.hasBitmap) {
|
|
shader.append(gVS_Header_Uniforms_HasBitmap);
|
|
}
|
|
if (description.hasRoundRectClip) {
|
|
shader.append(gVS_Header_Uniforms_HasRoundRectClip);
|
|
}
|
|
// Varyings
|
|
if (description.hasTexture || description.hasExternalTexture) {
|
|
shader.append(gVS_Header_Varyings_HasTexture);
|
|
}
|
|
if (description.hasVertexAlpha) {
|
|
shader.append(gVS_Header_Varyings_HasVertexAlpha);
|
|
}
|
|
if (description.hasColors) {
|
|
shader.append(gVS_Header_Varyings_HasColors);
|
|
}
|
|
if (description.hasGradient) {
|
|
shader.append(gVS_Header_Varyings_HasGradient[gradientIndex(description)]);
|
|
}
|
|
if (description.hasBitmap) {
|
|
shader.append(gVS_Header_Varyings_HasBitmap);
|
|
}
|
|
if (description.hasRoundRectClip) {
|
|
shader.append(gVS_Header_Varyings_HasRoundRectClip);
|
|
}
|
|
|
|
// Begin the shader
|
|
shader.append(gVS_Main); {
|
|
if (description.hasTextureTransform) {
|
|
shader.append(gVS_Main_OutTransformedTexCoords);
|
|
} else if (description.hasTexture || description.hasExternalTexture) {
|
|
shader.append(gVS_Main_OutTexCoords);
|
|
}
|
|
if (description.hasVertexAlpha) {
|
|
shader.append(gVS_Main_VertexAlpha);
|
|
}
|
|
if (description.hasColors) {
|
|
shader.append(gVS_Main_OutColors);
|
|
}
|
|
if (description.hasBitmap) {
|
|
shader.append(gVS_Main_OutBitmapTexCoords);
|
|
}
|
|
// Output transformed position
|
|
shader.append(gVS_Main_Position);
|
|
if (description.hasGradient) {
|
|
shader.append(gVS_Main_OutGradient[gradientIndex(description)]);
|
|
}
|
|
if (description.hasRoundRectClip) {
|
|
shader.append(gVS_Main_HasRoundRectClip);
|
|
}
|
|
}
|
|
// End the shader
|
|
shader.append(gVS_Footer);
|
|
|
|
PROGRAM_LOGD("*** Generated vertex shader:\n\n%s", shader.string());
|
|
|
|
return shader;
|
|
}
|
|
|
|
static bool shaderOp(const ProgramDescription& description, String8& shader,
|
|
const int modulateOp, const char** snippets) {
|
|
int op = description.hasAlpha8Texture ? MODULATE_OP_MODULATE_A8 : modulateOp;
|
|
op = op * 2 + description.hasGammaCorrection;
|
|
shader.append(snippets[op]);
|
|
return description.hasAlpha8Texture;
|
|
}
|
|
|
|
String8 ProgramCache::generateFragmentShader(const ProgramDescription& description) {
|
|
String8 shader(gFS_Header_Start);
|
|
|
|
const bool blendFramebuffer = description.framebufferMode >= SkBlendMode::kPlus;
|
|
if (blendFramebuffer) {
|
|
shader.append(gFS_Header_Extension_FramebufferFetch);
|
|
}
|
|
if (description.hasExternalTexture
|
|
|| (description.hasBitmap && description.isShaderBitmapExternal)) {
|
|
shader.append(gFS_Header_Extension_ExternalTexture);
|
|
}
|
|
|
|
shader.append(gFS_Header);
|
|
|
|
// Varyings
|
|
if (description.hasTexture || description.hasExternalTexture) {
|
|
shader.append(gVS_Header_Varyings_HasTexture);
|
|
}
|
|
if (description.hasVertexAlpha) {
|
|
shader.append(gVS_Header_Varyings_HasVertexAlpha);
|
|
}
|
|
if (description.hasColors) {
|
|
shader.append(gVS_Header_Varyings_HasColors);
|
|
}
|
|
if (description.hasGradient) {
|
|
shader.append(gVS_Header_Varyings_HasGradient[gradientIndex(description)]);
|
|
}
|
|
if (description.hasBitmap) {
|
|
shader.append(gVS_Header_Varyings_HasBitmap);
|
|
}
|
|
if (description.hasRoundRectClip) {
|
|
shader.append(gVS_Header_Varyings_HasRoundRectClip);
|
|
}
|
|
|
|
// Uniforms
|
|
int modulateOp = MODULATE_OP_NO_MODULATE;
|
|
const bool singleColor = !description.hasTexture && !description.hasExternalTexture &&
|
|
!description.hasGradient && !description.hasBitmap;
|
|
|
|
if (description.modulate || singleColor) {
|
|
shader.append(gFS_Uniforms_Color);
|
|
if (!singleColor) modulateOp = MODULATE_OP_MODULATE;
|
|
}
|
|
if (description.hasTexture || description.useShadowAlphaInterp) {
|
|
shader.append(gFS_Uniforms_TextureSampler);
|
|
} else if (description.hasExternalTexture) {
|
|
shader.append(gFS_Uniforms_ExternalTextureSampler);
|
|
}
|
|
if (description.hasGradient) {
|
|
shader.append(gFS_Uniforms_GradientSampler[description.isSimpleGradient]);
|
|
}
|
|
if (description.hasRoundRectClip) {
|
|
shader.append(gFS_Uniforms_HasRoundRectClip);
|
|
}
|
|
|
|
if (description.hasGammaCorrection) {
|
|
shader.appendFormat(gFS_Gamma_Preamble, Properties::textGamma, 1.0f / Properties::textGamma);
|
|
}
|
|
|
|
if (description.hasBitmap) {
|
|
if (description.isShaderBitmapExternal) {
|
|
shader.append(gFS_Uniforms_BitmapExternalSampler);
|
|
} else {
|
|
shader.append(gFS_Uniforms_BitmapSampler);
|
|
}
|
|
}
|
|
shader.append(gFS_Uniforms_ColorOp[static_cast<int>(description.colorOp)]);
|
|
|
|
if (description.hasColorSpaceConversion) {
|
|
shader.append(gFS_Uniforms_ColorSpaceConversion);
|
|
}
|
|
shader.append(gFS_Uniforms_TransferFunction[static_cast<int>(description.transferFunction)]);
|
|
|
|
// Generate required functions
|
|
if (description.hasGradient && description.hasBitmap) {
|
|
generateBlend(shader, "blendShaders", description.shadersMode);
|
|
}
|
|
if (description.colorOp == ProgramDescription::ColorFilterMode::Blend) {
|
|
generateBlend(shader, "blendColors", description.colorMode);
|
|
}
|
|
if (blendFramebuffer) {
|
|
generateBlend(shader, "blendFramebuffer", description.framebufferMode);
|
|
}
|
|
if (description.useShaderBasedWrap) {
|
|
generateTextureWrap(shader, description.bitmapWrapS, description.bitmapWrapT);
|
|
}
|
|
if (description.hasGradient || description.hasLinearTexture
|
|
|| description.hasColorSpaceConversion) {
|
|
shader.append(gFS_sRGB_TransferFunctions);
|
|
}
|
|
if (description.hasBitmap || ((description.hasTexture || description.hasExternalTexture) &&
|
|
!description.hasAlpha8Texture)) {
|
|
shader.append(gFS_TransferFunction[static_cast<int>(description.transferFunction)]);
|
|
shader.append(gFS_OETF[(description.hasLinearTexture || description.hasColorSpaceConversion)
|
|
&& !mHasLinearBlending]);
|
|
shader.append(gFS_ColorConvert[description.hasColorSpaceConversion
|
|
? 1 + description.hasTranslucentConversion : 0]);
|
|
}
|
|
if (description.hasGradient) {
|
|
shader.append(gFS_GradientFunctions);
|
|
shader.append(gFS_GradientPreamble[mHasLinearBlending]);
|
|
}
|
|
|
|
// Begin the shader
|
|
shader.append(gFS_Main); {
|
|
// Stores the result in fragColor directly
|
|
if (description.hasTexture || description.hasExternalTexture) {
|
|
if (description.hasAlpha8Texture) {
|
|
if (!description.hasGradient && !description.hasBitmap) {
|
|
shader.append(
|
|
gFS_Main_FetchA8Texture[modulateOp * 2 + description.hasGammaCorrection]);
|
|
}
|
|
} else {
|
|
shader.append(gFS_Main_FetchTexture[modulateOp]);
|
|
}
|
|
} else {
|
|
if (!description.hasGradient && !description.hasBitmap) {
|
|
shader.append(gFS_Main_FetchColor);
|
|
}
|
|
}
|
|
if (description.hasGradient) {
|
|
shader.append(gFS_Main_FetchGradient[gradientIndex(description)]);
|
|
}
|
|
if (description.hasBitmap) {
|
|
if (!description.useShaderBasedWrap) {
|
|
shader.append(gFS_Main_FetchBitmap);
|
|
} else {
|
|
shader.append(gFS_Main_FetchBitmapNpot);
|
|
}
|
|
}
|
|
bool applyModulate = false;
|
|
// Case when we have two shaders set
|
|
if (description.hasGradient && description.hasBitmap) {
|
|
if (description.isBitmapFirst) {
|
|
shader.append(gFS_Main_BlendShadersBG);
|
|
} else {
|
|
shader.append(gFS_Main_BlendShadersGB);
|
|
}
|
|
applyModulate = shaderOp(description, shader, modulateOp,
|
|
gFS_Main_BlendShaders_Modulate);
|
|
} else {
|
|
if (description.hasGradient) {
|
|
applyModulate = shaderOp(description, shader, modulateOp,
|
|
gFS_Main_GradientShader_Modulate);
|
|
} else if (description.hasBitmap) {
|
|
applyModulate = shaderOp(description, shader, modulateOp,
|
|
gFS_Main_BitmapShader_Modulate);
|
|
}
|
|
}
|
|
|
|
if (description.modulate && applyModulate) {
|
|
shader.append(gFS_Main_ModulateColor);
|
|
}
|
|
|
|
// Apply the color op if needed
|
|
shader.append(gFS_Main_ApplyColorOp[static_cast<int>(description.colorOp)]);
|
|
|
|
if (description.hasVertexAlpha) {
|
|
if (description.useShadowAlphaInterp) {
|
|
shader.append(gFS_Main_ApplyVertexAlphaShadowInterp);
|
|
} else {
|
|
shader.append(gFS_Main_ApplyVertexAlphaLinearInterp);
|
|
}
|
|
}
|
|
|
|
if (description.hasGradient) {
|
|
shader.append(gFS_Main_AddDither);
|
|
}
|
|
|
|
// Output the fragment
|
|
if (!blendFramebuffer) {
|
|
shader.append(gFS_Main_FragColor);
|
|
} else {
|
|
shader.append(!description.swapSrcDst ?
|
|
gFS_Main_FragColor_Blend : gFS_Main_FragColor_Blend_Swap);
|
|
}
|
|
if (description.hasColors) {
|
|
shader.append(gFS_Main_FragColor_HasColors);
|
|
}
|
|
if (description.hasRoundRectClip) {
|
|
shader.append(gFS_Main_FragColor_HasRoundRectClip);
|
|
}
|
|
if (description.hasDebugHighlight) {
|
|
shader.append(gFS_Main_DebugHighlight);
|
|
}
|
|
}
|
|
// End the shader
|
|
shader.append(gFS_Footer);
|
|
|
|
#if DEBUG_PROGRAMS
|
|
PROGRAM_LOGD("*** Generated fragment shader:\n\n");
|
|
printLongString(shader);
|
|
#endif
|
|
|
|
return shader;
|
|
}
|
|
|
|
void ProgramCache::generateBlend(String8& shader, const char* name, SkBlendMode mode) {
|
|
shader.append("\nvec4 ");
|
|
shader.append(name);
|
|
shader.append("(vec4 src, vec4 dst) {\n");
|
|
shader.append(" ");
|
|
shader.append(gBlendOps[(int)mode]);
|
|
shader.append("}\n");
|
|
}
|
|
|
|
void ProgramCache::generateTextureWrap(String8& shader, GLenum wrapS, GLenum wrapT) {
|
|
shader.append("\nhighp vec2 wrap(highp vec2 texCoords) {\n");
|
|
if (wrapS == GL_MIRRORED_REPEAT) {
|
|
shader.append(" highp float xMod2 = mod(texCoords.x, 2.0);\n");
|
|
shader.append(" if (xMod2 > 1.0) xMod2 = 2.0 - xMod2;\n");
|
|
}
|
|
if (wrapT == GL_MIRRORED_REPEAT) {
|
|
shader.append(" highp float yMod2 = mod(texCoords.y, 2.0);\n");
|
|
shader.append(" if (yMod2 > 1.0) yMod2 = 2.0 - yMod2;\n");
|
|
}
|
|
shader.append(" return vec2(");
|
|
switch (wrapS) {
|
|
case GL_CLAMP_TO_EDGE:
|
|
shader.append("texCoords.x");
|
|
break;
|
|
case GL_REPEAT:
|
|
shader.append("mod(texCoords.x, 1.0)");
|
|
break;
|
|
case GL_MIRRORED_REPEAT:
|
|
shader.append("xMod2");
|
|
break;
|
|
}
|
|
shader.append(", ");
|
|
switch (wrapT) {
|
|
case GL_CLAMP_TO_EDGE:
|
|
shader.append("texCoords.y");
|
|
break;
|
|
case GL_REPEAT:
|
|
shader.append("mod(texCoords.y, 1.0)");
|
|
break;
|
|
case GL_MIRRORED_REPEAT:
|
|
shader.append("yMod2");
|
|
break;
|
|
}
|
|
shader.append(");\n");
|
|
shader.append("}\n");
|
|
}
|
|
|
|
void ProgramCache::printLongString(const String8& shader) const {
|
|
ssize_t index = 0;
|
|
ssize_t lastIndex = 0;
|
|
const char* str = shader.string();
|
|
while ((index = shader.find("\n", index)) > -1) {
|
|
String8 line(str, index - lastIndex);
|
|
if (line.length() == 0) line.append("\n");
|
|
ALOGD("%s", line.string());
|
|
index++;
|
|
str += (index - lastIndex);
|
|
lastIndex = index;
|
|
}
|
|
}
|
|
|
|
}; // namespace uirenderer
|
|
}; // namespace android
|