String8 ProgramCache::generateFragmentShader(const ProgramDescription& description) {
String8 shader;
const bool blendFramebuffer = description.framebufferMode >= SkXfermode::kPlus_Mode;
if (blendFramebuffer) {
shader.append(gFS_Header_Extension_FramebufferFetch);
}
if (description.hasExternalTexture) {
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) {
shader.append(gFS_Uniforms_TextureSampler);
} else if (description.hasExternalTexture) {
shader.append(gFS_Uniforms_ExternalTextureSampler);
}
if (description.hasGradient) {
shader.appendFormat(gFS_Uniforms_GradientSampler[description.isSimpleGradient],
gFS_Uniforms_Dither);
}
if (description.hasGammaCorrection) {
shader.append(gFS_Uniforms_Gamma);
}
if (description.hasRoundRectClip) {
shader.append(gFS_Uniforms_HasRoundRectClip);
}
// Optimization for common cases
if (!description.hasVertexAlpha
&& !blendFramebuffer
&& !description.hasColors
&& description.colorOp == ProgramDescription::kColorNone
&& !description.hasDebugHighlight
&& !description.emulateStencil
&& !description.hasRoundRectClip) {
bool fast = false;
const bool noShader = !description.hasGradient && !description.hasBitmap;
const bool singleTexture = (description.hasTexture || description.hasExternalTexture) &&
!description.hasAlpha8Texture && noShader;
const bool singleA8Texture = description.hasTexture &&
description.hasAlpha8Texture && noShader;
const bool singleGradient = !description.hasTexture && !description.hasExternalTexture &&
description.hasGradient && !description.hasBitmap &&
description.gradientType == ProgramDescription::kGradientLinear;
if (singleColor) {
shader.append(gFS_Fast_SingleColor);
fast = true;
} else if (singleTexture) {
if (!description.modulate) {
shader.append(gFS_Fast_SingleTexture);
} else {
shader.append(gFS_Fast_SingleModulateTexture);
}
fast = true;
} else if (singleA8Texture) {
if (!description.modulate) {
if (description.hasGammaCorrection) {
shader.append(gFS_Fast_SingleA8Texture_ApplyGamma);
} else {
shader.append(gFS_Fast_SingleA8Texture);
}
} else {
if (description.hasGammaCorrection) {
shader.append(gFS_Fast_SingleModulateA8Texture_ApplyGamma);
} else {
shader.append(gFS_Fast_SingleModulateA8Texture);
}
}
fast = true;
} else if (singleGradient) {
if (!description.modulate) {
shader.appendFormat(gFS_Fast_SingleGradient[description.isSimpleGradient],
gFS_Main_Dither[mHasES3]);
} else {
shader.appendFormat(gFS_Fast_SingleModulateGradient[description.isSimpleGradient],
gFS_Main_Dither[mHasES3]);
}
fast = true;
}
if (fast) {
#if DEBUG_PROGRAMS
PROGRAM_LOGD("*** Fast case:\n");
PROGRAM_LOGD("*** Generated fragment shader:\n\n");
printLongString(shader);
#endif
return shader;
}
}
if (description.hasBitmap) {
shader.append(gFS_Uniforms_BitmapSampler);
}
shader.append(gFS_Uniforms_ColorOp[description.colorOp]);
// Generate required functions
if (description.hasGradient && description.hasBitmap) {
generateBlend(shader, "blendShaders", description.shadersMode);
}
if (description.colorOp == ProgramDescription::kColorBlend) {
generateBlend(shader, "blendColors", description.colorMode);
}
if (blendFramebuffer) {
generateBlend(shader, "blendFramebuffer", description.framebufferMode);
}
if (description.isBitmapNpot) {
generateTextureWrap(shader, description.bitmapWrapS, description.bitmapWrapT);
}
// Begin the shader
shader.append(gFS_Main); {
if (description.emulateStencil) {
shader.append(gFS_Main_EmulateStencil);
}
// 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)]);
shader.appendFormat(gFS_Main_AddDitherToGradient, gFS_Main_Dither[mHasES3]);
}
if (description.hasBitmap) {
if (!description.isBitmapNpot) {
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[description.colorOp]);
if (description.hasVertexAlpha) {
if (description.useShadowAlphaInterp) {
shader.append(gFS_Main_ApplyVertexAlphaShadowInterp);
} else {
shader.append(gFS_Main_ApplyVertexAlphaLinearInterp);
}
}
// 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);
}
}
if (description.emulateStencil) {
shader.append(gFS_Footer_EmulateStencil);
}
// End the shader
shader.append(gFS_Footer);
#if DEBUG_PROGRAMS
PROGRAM_LOGD("*** Generated fragment shader:\n\n");
printLongString(shader);
#endif
return shader;
}
String8 ProgramCache::generateFragmentShader(const ProgramDescription& description) {
String8 shader;
const bool blendFramebuffer = description.framebufferMode >= SkXfermode::kPlus_Mode;
if (blendFramebuffer) {
shader.append(gFS_Header_Extension_FramebufferFetch);
}
if (description.hasExternalTexture) {
shader.append(gFS_Header_Extension_ExternalTexture);
}
shader.append(gFS_Header);
// Varyings
if (description.hasTexture || description.hasExternalTexture) {
shader.append(gVS_Header_Varyings_HasTexture);
}
if (description.isAA) {
shader.append(gVS_Header_Varyings_IsAA);
}
if (description.hasGradient) {
shader.append(gVS_Header_Varyings_HasGradient[description.gradientType]);
}
if (description.hasBitmap) {
int index = Caches::getInstance().extensions.needsHighpTexCoords() ? 1 : 0;
shader.append(description.isPoint ?
gVS_Header_Varyings_PointHasBitmap[index] :
gVS_Header_Varyings_HasBitmap[index]);
}
// 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) {
shader.append(gFS_Uniforms_TextureSampler);
} else if (description.hasExternalTexture) {
shader.append(gFS_Uniforms_ExternalTextureSampler);
}
if (description.isAA) {
shader.append(gFS_Uniforms_AA);
}
if (description.hasGradient) {
shader.append(gFS_Uniforms_GradientSampler[description.gradientType]);
}
if (description.hasBitmap && description.isPoint) {
shader.append(gFS_Header_Uniforms_PointHasBitmap);
}
// Optimization for common cases
if (!description.isAA && !blendFramebuffer &&
description.colorOp == ProgramDescription::kColorNone && !description.isPoint) {
bool fast = false;
const bool noShader = !description.hasGradient && !description.hasBitmap;
const bool singleTexture = (description.hasTexture || description.hasExternalTexture) &&
!description.hasAlpha8Texture && noShader;
const bool singleA8Texture = description.hasTexture &&
description.hasAlpha8Texture && noShader;
const bool singleGradient = !description.hasTexture && !description.hasExternalTexture &&
description.hasGradient && !description.hasBitmap &&
description.gradientType == ProgramDescription::kGradientLinear;
if (singleColor) {
shader.append(gFS_Fast_SingleColor);
fast = true;
} else if (singleTexture) {
if (!description.modulate) {
shader.append(gFS_Fast_SingleTexture);
} else {
shader.append(gFS_Fast_SingleModulateTexture);
}
fast = true;
} else if (singleA8Texture) {
if (!description.modulate) {
shader.append(gFS_Fast_SingleA8Texture);
} else {
shader.append(gFS_Fast_SingleModulateA8Texture);
}
fast = true;
} else if (singleGradient) {
if (!description.modulate) {
shader.append(gFS_Fast_SingleGradient);
} else {
shader.append(gFS_Fast_SingleModulateGradient);
}
fast = true;
}
if (fast) {
#if DEBUG_PROGRAMS
PROGRAM_LOGD("*** Fast case:\n");
PROGRAM_LOGD("*** Generated fragment shader:\n\n");
printLongString(shader);
#endif
return shader;
}
}
if (description.hasBitmap) {
shader.append(gFS_Uniforms_BitmapSampler);
}
shader.append(gFS_Uniforms_ColorOp[description.colorOp]);
// Generate required functions
if (description.hasGradient && description.hasBitmap) {
generateBlend(shader, "blendShaders", description.shadersMode);
}
if (description.colorOp == ProgramDescription::kColorBlend) {
generateBlend(shader, "blendColors", description.colorMode);
}
if (blendFramebuffer) {
generateBlend(shader, "blendFramebuffer", description.framebufferMode);
}
if (description.isBitmapNpot) {
generateTextureWrap(shader, description.bitmapWrapS, description.bitmapWrapT);
}
// 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]);
}
} else {
shader.append(gFS_Main_FetchTexture[modulateOp]);
}
} else {
if ((!description.hasGradient && !description.hasBitmap) || description.modulate) {
shader.append(gFS_Main_FetchColor);
}
}
if (description.isAA) {
shader.append(gFS_Main_AccountForAA);
}
if (description.hasGradient) {
shader.append(gFS_Main_FetchGradient[description.gradientType]);
}
if (description.hasBitmap) {
if (description.isPoint) {
shader.append(gFS_Main_PointBitmapTexCoords);
}
if (!description.isBitmapNpot) {
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) {
int op = description.hasAlpha8Texture ? MODULATE_OP_MODULATE_A8 : modulateOp;
if (description.isBitmapFirst) {
shader.append(gFS_Main_BlendShadersBG);
} else {
shader.append(gFS_Main_BlendShadersGB);
}
shader.append(gFS_Main_BlendShaders_Modulate[op]);
applyModulate = true;
} else {
if (description.hasGradient) {
int op = description.hasAlpha8Texture ? MODULATE_OP_MODULATE_A8 : modulateOp;
shader.append(gFS_Main_GradientShader_Modulate[op]);
applyModulate = true;
} else if (description.hasBitmap) {
int op = description.hasAlpha8Texture ? MODULATE_OP_MODULATE_A8 : modulateOp;
shader.append(gFS_Main_BitmapShader_Modulate[op]);
applyModulate = true;
}
}
if (description.modulate && applyModulate) {
shader.append(gFS_Main_ModulateColor);
}
// Apply the color op if needed
shader.append(gFS_Main_ApplyColorOp[description.colorOp]);
// Output the fragment
if (!blendFramebuffer) {
shader.append(gFS_Main_FragColor);
} else {
shader.append(!description.swapSrcDst ?
gFS_Main_FragColor_Blend : gFS_Main_FragColor_Blend_Swap);
}
}
// End the shader
shader.append(gFS_Footer);
#if DEBUG_PROGRAMS
PROGRAM_LOGD("*** Generated fragment shader:\n\n");
printLongString(shader);
#endif
return shader;
}