void GrGLProgram::setColor(const GrDrawState& drawState,
GrColor color,
SharedGLState* sharedState) {
const GrGLProgramDesc::KeyHeader& header = fDesc.getHeader();
if (!drawState.hasColorVertexAttribute() || drawState.canIgnoreColorAttribute()) {
switch (header.fColorInput) {
case GrGLProgramDesc::kAttribute_ColorInput:
SkASSERT(-1 != header.fColorAttributeIndex);
if (sharedState->fConstAttribColor != color ||
sharedState->fConstAttribColorIndex != header.fColorAttributeIndex) {
// OpenGL ES only supports the float varieties of glVertexAttrib
GrGLfloat c[4];
GrColorToRGBAFloat(color, c);
GL_CALL(VertexAttrib4fv(header.fColorAttributeIndex, c));
sharedState->fConstAttribColor = color;
sharedState->fConstAttribColorIndex = header.fColorAttributeIndex;
}
break;
case GrGLProgramDesc::kUniform_ColorInput:
if (fColor != color && fBuilderOutput.fUniformHandles.fColorUni.isValid()) {
// OpenGL ES doesn't support unsigned byte varieties of glUniform
GrGLfloat c[4];
GrColorToRGBAFloat(color, c);
fUniformManager->set4fv(fBuilderOutput.fUniformHandles.fColorUni, 1, c);
fColor = color;
}
sharedState->fConstAttribColorIndex = -1;
break;
default:
SkFAIL("Unexpected color type.");
}
} else {
sharedState->fConstAttribColorIndex = -1;
}
}
GrDrawState::CombinedState GrDrawState::CombineIfPossible(
const GrDrawState& a, const GrDrawState& b, const GrDrawTargetCaps& caps) {
if (!a.isEqual(b)) {
return kIncompatible_CombinedState;
}
// If the general draw states are equal (from check above) we know hasColorVertexAttribute()
// is equivalent for both a and b
if (a.hasColorVertexAttribute()) {
// If one is opaque and the other is not then the combined state is not opaque. Moreover,
// if the opaqueness affects the ability to get color/coverage blending correct then we
// don't combine the draw states.
bool aIsOpaque = (kVertexColorsAreOpaque_Hint & a.fHints);
bool bIsOpaque = (kVertexColorsAreOpaque_Hint & b.fHints);
if (aIsOpaque != bIsOpaque) {
const GrDrawState* opaque;
const GrDrawState* nonOpaque;
if (aIsOpaque) {
opaque = &a;
nonOpaque = &b;
} else {
opaque = &b;
nonOpaque = &a;
}
if (!opaque->hasSolidCoverage() && opaque->couldApplyCoverage(caps)) {
SkASSERT(!nonOpaque->hasSolidCoverage());
if (!nonOpaque->couldApplyCoverage(caps)) {
return kIncompatible_CombinedState;
}
}
return aIsOpaque ? kB_CombinedState : kA_CombinedState;
}
}
return kAOrB_CombinedState;
}
void GrGLProgramDesc::Build(const GrDrawState& drawState,
bool isPoints,
GrDrawState::BlendOptFlags blendOpts,
GrBlendCoeff srcCoeff,
GrBlendCoeff dstCoeff,
const GrGpuGL* gpu,
const GrDeviceCoordTexture* dstCopy,
SkTArray<const GrEffectStage*, true>* colorStages,
SkTArray<const GrEffectStage*, true>* coverageStages,
GrGLProgramDesc* desc) {
colorStages->reset();
coverageStages->reset();
// This should already have been caught
SkASSERT(!(GrDrawState::kSkipDraw_BlendOptFlag & blendOpts));
bool skipCoverage = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
bool skipColor = SkToBool(blendOpts & (GrDrawState::kEmitTransBlack_BlendOptFlag |
GrDrawState::kEmitCoverage_BlendOptFlag));
int firstEffectiveColorStage = 0;
bool inputColorIsUsed = true;
if (!skipColor) {
firstEffectiveColorStage = drawState.numColorStages();
while (firstEffectiveColorStage > 0 && inputColorIsUsed) {
--firstEffectiveColorStage;
const GrEffect* effect = drawState.getColorStage(firstEffectiveColorStage).getEffect()->get();
inputColorIsUsed = effect->willUseInputColor();
}
}
int firstEffectiveCoverageStage = 0;
bool inputCoverageIsUsed = true;
if (!skipCoverage) {
firstEffectiveCoverageStage = drawState.numCoverageStages();
while (firstEffectiveCoverageStage > 0 && inputCoverageIsUsed) {
--firstEffectiveCoverageStage;
const GrEffect* effect = drawState.getCoverageStage(firstEffectiveCoverageStage).getEffect()->get();
inputCoverageIsUsed = effect->willUseInputColor();
}
}
// The descriptor is used as a cache key. Thus when a field of the
// descriptor will not affect program generation (because of the attribute
// bindings in use or other descriptor field settings) it should be set
// to a canonical value to avoid duplicate programs with different keys.
bool requiresColorAttrib = !skipColor && drawState.hasColorVertexAttribute();
bool requiresCoverageAttrib = !skipCoverage && drawState.hasCoverageVertexAttribute();
// we only need the local coords if we're actually going to generate effect code
bool requiresLocalCoordAttrib = !(skipCoverage && skipColor) &&
drawState.hasLocalCoordAttribute();
bool colorIsTransBlack = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
bool colorIsSolidWhite = (blendOpts & GrDrawState::kEmitCoverage_BlendOptFlag) ||
(!requiresColorAttrib && 0xffffffff == drawState.getColor()) ||
(!inputColorIsUsed);
int numEffects = (skipColor ? 0 : (drawState.numColorStages() - firstEffectiveColorStage)) +
(skipCoverage ? 0 : (drawState.numCoverageStages() - firstEffectiveCoverageStage));
size_t newKeyLength = KeyLength(numEffects);
bool allocChanged;
desc->fKey.reset(newKeyLength, SkAutoMalloc::kAlloc_OnShrink, &allocChanged);
if (allocChanged || !desc->fInitialized) {
// make sure any padding in the header is zero if we we haven't used this allocation before.
memset(desc->header(), 0, kHeaderSize);
}
// write the key length
*desc->atOffset<uint32_t, kLengthOffset>() = SkToU32(newKeyLength);
KeyHeader* header = desc->header();
EffectKey* effectKeys = desc->effectKeys();
int currEffectKey = 0;
bool readsDst = false;
bool readFragPosition = false;
bool hasVertexCode = false;
if (!skipColor) {
for (int s = firstEffectiveColorStage; s < drawState.numColorStages(); ++s) {
effectKeys[currEffectKey++] =
get_key_and_update_stats(drawState.getColorStage(s), gpu->glCaps(),
requiresLocalCoordAttrib, &readsDst, &readFragPosition,
&hasVertexCode);
}
}
if (!skipCoverage) {
for (int s = firstEffectiveCoverageStage; s < drawState.numCoverageStages(); ++s) {
effectKeys[currEffectKey++] =
get_key_and_update_stats(drawState.getCoverageStage(s), gpu->glCaps(),
requiresLocalCoordAttrib, &readsDst, &readFragPosition,
&hasVertexCode);
}
}
header->fHasVertexCode = hasVertexCode || requiresLocalCoordAttrib;
header->fEmitsPointSize = isPoints;
// Currently the experimental GS will only work with triangle prims (and it doesn't do anything
// other than pass through values from the VS to the FS anyway).
#if GR_GL_EXPERIMENTAL_GS
#if 0
header->fExperimentalGS = gpu->caps().geometryShaderSupport();
#else
header->fExperimentalGS = false;
#endif
#endif
bool defaultToUniformInputs = GR_GL_NO_CONSTANT_ATTRIBUTES || gpu->caps()->pathRenderingSupport();
if (colorIsTransBlack) {
header->fColorInput = kTransBlack_ColorInput;
} else if (colorIsSolidWhite) {
header->fColorInput = kSolidWhite_ColorInput;
} else if (defaultToUniformInputs && !requiresColorAttrib) {
header->fColorInput = kUniform_ColorInput;
} else {
header->fColorInput = kAttribute_ColorInput;
header->fHasVertexCode = true;
}
bool covIsSolidWhite = !requiresCoverageAttrib && 0xffffffff == drawState.getCoverageColor();
if (skipCoverage) {
header->fCoverageInput = kTransBlack_ColorInput;
} else if (covIsSolidWhite || !inputCoverageIsUsed) {
header->fCoverageInput = kSolidWhite_ColorInput;
} else if (defaultToUniformInputs && !requiresCoverageAttrib) {
header->fCoverageInput = kUniform_ColorInput;
} else {
header->fCoverageInput = kAttribute_ColorInput;
header->fHasVertexCode = true;
}
if (readsDst) {
SkASSERT(NULL != dstCopy || gpu->caps()->dstReadInShaderSupport());
const GrTexture* dstCopyTexture = NULL;
if (NULL != dstCopy) {
dstCopyTexture = dstCopy->texture();
}
header->fDstReadKey = GrGLShaderBuilder::KeyForDstRead(dstCopyTexture, gpu->glCaps());
SkASSERT(0 != header->fDstReadKey);
} else {
header->fDstReadKey = 0;
}
if (readFragPosition) {
header->fFragPosKey = GrGLShaderBuilder::KeyForFragmentPosition(drawState.getRenderTarget(),
gpu->glCaps());
} else {
header->fFragPosKey = 0;
}
// Record attribute indices
header->fPositionAttributeIndex = drawState.positionAttributeIndex();
header->fLocalCoordAttributeIndex = drawState.localCoordAttributeIndex();
// For constant color and coverage we need an attribute with an index beyond those already set
int availableAttributeIndex = drawState.getVertexAttribCount();
if (requiresColorAttrib) {
header->fColorAttributeIndex = drawState.colorVertexAttributeIndex();
} else if (GrGLProgramDesc::kAttribute_ColorInput == header->fColorInput) {
SkASSERT(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
header->fColorAttributeIndex = availableAttributeIndex;
availableAttributeIndex++;
} else {
header->fColorAttributeIndex = -1;
}
if (requiresCoverageAttrib) {
header->fCoverageAttributeIndex = drawState.coverageVertexAttributeIndex();
} else if (GrGLProgramDesc::kAttribute_ColorInput == header->fCoverageInput) {
SkASSERT(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
header->fCoverageAttributeIndex = availableAttributeIndex;
} else {
header->fCoverageAttributeIndex = -1;
}
// Here we deal with whether/how we handle color and coverage separately.
// Set this default and then possibly change our mind if there is coverage.
header->fCoverageOutput = kModulate_CoverageOutput;
// If we do have coverage determine whether it matters.
bool separateCoverageFromColor = false;
if (!drawState.isCoverageDrawing() && !skipCoverage &&
(drawState.numCoverageStages() > 0 || requiresCoverageAttrib)) {
if (gpu->caps()->dualSourceBlendingSupport() &&
!(blendOpts & (GrDrawState::kEmitCoverage_BlendOptFlag |
GrDrawState::kCoverageAsAlpha_BlendOptFlag))) {
if (kZero_GrBlendCoeff == dstCoeff) {
// write the coverage value to second color
header->fCoverageOutput = kSecondaryCoverage_CoverageOutput;
separateCoverageFromColor = true;
} else if (kSA_GrBlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
header->fCoverageOutput = kSecondaryCoverageISA_CoverageOutput;
separateCoverageFromColor = true;
} else if (kSC_GrBlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
header->fCoverageOutput = kSecondaryCoverageISC_CoverageOutput;
separateCoverageFromColor = true;
}
} else if (readsDst &&
kOne_GrBlendCoeff == srcCoeff &&
kZero_GrBlendCoeff == dstCoeff) {
header->fCoverageOutput = kCombineWithDst_CoverageOutput;
separateCoverageFromColor = true;
}
}
if (!skipColor) {
for (int s = firstEffectiveColorStage; s < drawState.numColorStages(); ++s) {
colorStages->push_back(&drawState.getColorStage(s));
}
}
if (!skipCoverage) {
SkTArray<const GrEffectStage*, true>* array;
if (separateCoverageFromColor) {
array = coverageStages;
} else {
array = colorStages;
}
for (int s = firstEffectiveCoverageStage; s < drawState.numCoverageStages(); ++s) {
array->push_back(&drawState.getCoverageStage(s));
}
}
header->fColorEffectCnt = colorStages->count();
header->fCoverageEffectCnt = coverageStages->count();
*desc->checksum() = 0;
*desc->checksum() = SkChecksum::Compute(reinterpret_cast<uint32_t*>(desc->fKey.get()),
newKeyLength);
desc->fInitialized = true;
}
void GrGLProgramDesc::Build(const GrDrawState& drawState,
bool isPoints,
GrDrawState::BlendOptFlags blendOpts,
GrBlendCoeff srcCoeff,
GrBlendCoeff dstCoeff,
const GrGpuGL* gpu,
const GrDeviceCoordTexture* dstCopy,
GrGLProgramDesc* desc) {
// This should already have been caught
GrAssert(!(GrDrawState::kSkipDraw_BlendOptFlag & blendOpts));
bool skipCoverage = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
bool skipColor = SkToBool(blendOpts & (GrDrawState::kEmitTransBlack_BlendOptFlag |
GrDrawState::kEmitCoverage_BlendOptFlag));
// The descriptor is used as a cache key. Thus when a field of the
// descriptor will not affect program generation (because of the attribute
// bindings in use or other descriptor field settings) it should be set
// to a canonical value to avoid duplicate programs with different keys.
desc->fEmitsPointSize = isPoints;
bool requiresColorAttrib = !skipColor && drawState.hasColorVertexAttribute();
bool requiresCoverageAttrib = !skipCoverage && drawState.hasCoverageVertexAttribute();
// we only need the local coords if we're actually going to generate effect code
bool requiresLocalCoordAttrib = !(skipCoverage && skipColor) &&
drawState.hasLocalCoordAttribute();
// fColorInput/fCoverageInput records how colors are specified for the program so we strip the
// bits from the bindings to avoid false negatives when searching for an existing program in the
// cache.
desc->fColorFilterXfermode = skipColor ? SkXfermode::kDst_Mode : drawState.getColorFilterMode();
bool colorIsTransBlack = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
bool colorIsSolidWhite = (blendOpts & GrDrawState::kEmitCoverage_BlendOptFlag) ||
(!requiresColorAttrib && 0xffffffff == drawState.getColor());
if (colorIsTransBlack) {
desc->fColorInput = kTransBlack_ColorInput;
} else if (colorIsSolidWhite) {
desc->fColorInput = kSolidWhite_ColorInput;
} else if (GR_GL_NO_CONSTANT_ATTRIBUTES && !requiresColorAttrib) {
desc->fColorInput = kUniform_ColorInput;
} else {
desc->fColorInput = kAttribute_ColorInput;
}
bool covIsSolidWhite = !requiresCoverageAttrib && 0xffffffff == drawState.getCoverage();
if (skipCoverage) {
desc->fCoverageInput = kTransBlack_ColorInput;
} else if (covIsSolidWhite) {
desc->fCoverageInput = kSolidWhite_ColorInput;
} else if (GR_GL_NO_CONSTANT_ATTRIBUTES && !requiresCoverageAttrib) {
desc->fCoverageInput = kUniform_ColorInput;
} else {
desc->fCoverageInput = kAttribute_ColorInput;
}
bool readsDst = false;
int lastEnabledStage = -1;
for (int s = 0; s < GrDrawState::kNumStages; ++s) {
bool skip = s < drawState.getFirstCoverageStage() ? skipColor : skipCoverage;
if (!skip && drawState.isStageEnabled(s)) {
lastEnabledStage = s;
const GrEffectRef& effect = *drawState.getStage(s).getEffect();
const GrBackendEffectFactory& factory = effect->getFactory();
GrDrawEffect drawEffect(drawState.getStage(s), requiresLocalCoordAttrib);
desc->fEffectKeys[s] = factory.glEffectKey(drawEffect, gpu->glCaps());
if (effect->willReadDst()) {
readsDst = true;
}
} else {
desc->fEffectKeys[s] = 0;
}
}
if (readsDst) {
GrAssert(NULL != dstCopy);
desc->fDstRead = GrGLShaderBuilder::KeyForDstRead(dstCopy->texture(), gpu->glCaps());
GrAssert(0 != desc->fDstRead);
} else {
desc->fDstRead = 0;
}
desc->fCoverageOutput = kModulate_CoverageOutput;
// Currently the experimental GS will only work with triangle prims (and it doesn't do anything
// other than pass through values from the VS to the FS anyway).
#if GR_GL_EXPERIMENTAL_GS
#if 0
desc->fExperimentalGS = gpu->caps().geometryShaderSupport();
#else
desc->fExperimentalGS = false;
#endif
#endif
// We leave this set to kNumStages until we discover that the coverage/color distinction is
// material to the generated program. We do this to avoid distinct keys that generate equivalent
// programs.
desc->fFirstCoverageStage = GrDrawState::kNumStages;
// This tracks the actual first coverage stage.
int firstCoverageStage = GrDrawState::kNumStages;
desc->fDiscardIfZeroCoverage = false; // Enabled below if stenciling and there is coverage.
bool hasCoverage = false;
// If we're rendering coverage-as-color then it's as though there are no coverage stages.
if (!drawState.isCoverageDrawing()) {
// We can have coverage either through a stage or coverage vertex attributes.
if (drawState.getFirstCoverageStage() <= lastEnabledStage) {
firstCoverageStage = drawState.getFirstCoverageStage();
hasCoverage = true;
} else {
hasCoverage = requiresCoverageAttrib;
}
}
if (hasCoverage) {
// color filter is applied between color/coverage computation
if (SkXfermode::kDst_Mode != desc->fColorFilterXfermode) {
desc->fFirstCoverageStage = firstCoverageStage;
}
// If we're stenciling then we want to discard samples that have zero coverage
if (drawState.getStencil().doesWrite()) {
desc->fDiscardIfZeroCoverage = true;
desc->fFirstCoverageStage = firstCoverageStage;
}
if (gpu->caps()->dualSourceBlendingSupport() &&
!(blendOpts & (GrDrawState::kEmitCoverage_BlendOptFlag |
GrDrawState::kCoverageAsAlpha_BlendOptFlag))) {
if (kZero_GrBlendCoeff == dstCoeff) {
// write the coverage value to second color
desc->fCoverageOutput = kSecondaryCoverage_CoverageOutput;
desc->fFirstCoverageStage = firstCoverageStage;
} else if (kSA_GrBlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
desc->fCoverageOutput = kSecondaryCoverageISA_CoverageOutput;
desc->fFirstCoverageStage = firstCoverageStage;
} else if (kSC_GrBlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
desc->fCoverageOutput = kSecondaryCoverageISC_CoverageOutput;
desc->fFirstCoverageStage = firstCoverageStage;
}
} else if (readsDst &&
kOne_GrBlendCoeff == drawState.getSrcBlendCoeff() &&
kZero_GrBlendCoeff == drawState.getDstBlendCoeff()) {
desc->fCoverageOutput = kCombineWithDst_CoverageOutput;
desc->fFirstCoverageStage = firstCoverageStage;
}
}
desc->fPositionAttributeIndex = drawState.positionAttributeIndex();
desc->fLocalCoordAttributeIndex = drawState.localCoordAttributeIndex();
// For constant color and coverage we need an attribute with an index beyond those already set
int availableAttributeIndex = drawState.getVertexAttribCount();
if (requiresColorAttrib) {
desc->fColorAttributeIndex = drawState.colorVertexAttributeIndex();
} else if (GrGLProgramDesc::kAttribute_ColorInput == desc->fColorInput) {
GrAssert(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
desc->fColorAttributeIndex = availableAttributeIndex;
availableAttributeIndex++;
} else {
desc->fColorAttributeIndex = -1;
}
if (requiresCoverageAttrib) {
desc->fCoverageAttributeIndex = drawState.coverageVertexAttributeIndex();
} else if (GrGLProgramDesc::kAttribute_ColorInput == desc->fCoverageInput) {
GrAssert(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
desc->fCoverageAttributeIndex = availableAttributeIndex;
} else {
desc->fCoverageAttributeIndex = -1;
}
}
bool GrGLProgramDesc::Build(const GrDrawState& drawState,
GrGpu::DrawType drawType,
GrDrawState::BlendOptFlags blendOpts,
GrBlendCoeff srcCoeff,
GrBlendCoeff dstCoeff,
const GrGpuGL* gpu,
const GrDeviceCoordTexture* dstCopy,
const GrEffectStage** geometryProcessor,
SkTArray<const GrEffectStage*, true>* colorStages,
SkTArray<const GrEffectStage*, true>* coverageStages,
GrGLProgramDesc* desc) {
colorStages->reset();
coverageStages->reset();
// This should already have been caught
SkASSERT(!(GrDrawState::kSkipDraw_BlendOptFlag & blendOpts));
bool skipCoverage = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
bool skipColor = SkToBool(blendOpts & (GrDrawState::kEmitTransBlack_BlendOptFlag |
GrDrawState::kEmitCoverage_BlendOptFlag));
int firstEffectiveColorStage = 0;
bool inputColorIsUsed = true;
if (!skipColor) {
firstEffectiveColorStage = drawState.numColorStages();
while (firstEffectiveColorStage > 0 && inputColorIsUsed) {
--firstEffectiveColorStage;
const GrEffect* effect = drawState.getColorStage(firstEffectiveColorStage).getEffect();
inputColorIsUsed = effect->willUseInputColor();
}
}
int firstEffectiveCoverageStage = 0;
bool inputCoverageIsUsed = true;
if (!skipCoverage) {
firstEffectiveCoverageStage = drawState.numCoverageStages();
while (firstEffectiveCoverageStage > 0 && inputCoverageIsUsed) {
--firstEffectiveCoverageStage;
const GrEffect* effect = drawState.getCoverageStage(firstEffectiveCoverageStage).getEffect();
inputCoverageIsUsed = effect->willUseInputColor();
}
}
// The descriptor is used as a cache key. Thus when a field of the
// descriptor will not affect program generation (because of the attribute
// bindings in use or other descriptor field settings) it should be set
// to a canonical value to avoid duplicate programs with different keys.
bool requiresColorAttrib = !skipColor && drawState.hasColorVertexAttribute();
bool requiresCoverageAttrib = !skipCoverage && drawState.hasCoverageVertexAttribute();
// we only need the local coords if we're actually going to generate effect code
bool requiresLocalCoordAttrib = !(skipCoverage && skipColor) &&
drawState.hasLocalCoordAttribute();
bool readsDst = false;
bool readFragPosition = false;
// Provide option for shader programs without vertex shader only when drawing paths.
bool requiresVertexShader = !GrGpu::IsPathRenderingDrawType(drawType);
int numStages = 0;
if (drawState.hasGeometryProcessor()) {
numStages++;
}
if (!skipColor) {
numStages += drawState.numColorStages() - firstEffectiveColorStage;
}
if (!skipCoverage) {
numStages += drawState.numCoverageStages() - firstEffectiveCoverageStage;
}
GR_STATIC_ASSERT(0 == kEffectKeyOffsetsAndLengthOffset % sizeof(uint32_t));
// Make room for everything up to and including the array of offsets to effect keys.
desc->fKey.reset();
desc->fKey.push_back_n(kEffectKeyOffsetsAndLengthOffset + 2 * sizeof(uint16_t) * numStages);
int offsetAndSizeIndex = 0;
bool effectKeySuccess = true;
KeyHeader* header = desc->header();
// make sure any padding in the header is zeroed.
memset(desc->header(), 0, kHeaderSize);
// We can only have one effect which touches the vertex shader
if (drawState.hasGeometryProcessor()) {
uint16_t* offsetAndSize =
reinterpret_cast<uint16_t*>(desc->fKey.begin() + kEffectKeyOffsetsAndLengthOffset +
offsetAndSizeIndex * 2 * sizeof(uint16_t));
GrEffectKeyBuilder b(&desc->fKey);
uint16_t effectKeySize;
uint32_t effectOffset = desc->fKey.count();
effectKeySuccess |= GetEffectKeyAndUpdateStats(
*drawState.getGeometryProcessor(), gpu->glCaps(),
requiresLocalCoordAttrib, &b,
&effectKeySize, &readsDst,
&readFragPosition, &requiresVertexShader);
effectKeySuccess |= (effectOffset <= SK_MaxU16);
offsetAndSize[0] = SkToU16(effectOffset);
offsetAndSize[1] = effectKeySize;
++offsetAndSizeIndex;
*geometryProcessor = drawState.getGeometryProcessor();
SkASSERT(requiresVertexShader);
header->fHasGeometryProcessor = true;
}
if (!skipColor) {
for (int s = firstEffectiveColorStage; s < drawState.numColorStages(); ++s) {
uint16_t* offsetAndSize =
reinterpret_cast<uint16_t*>(desc->fKey.begin() + kEffectKeyOffsetsAndLengthOffset +
offsetAndSizeIndex * 2 * sizeof(uint16_t));
bool effectRequiresVertexShader = false;
GrEffectKeyBuilder b(&desc->fKey);
uint16_t effectKeySize;
uint32_t effectOffset = desc->fKey.count();
effectKeySuccess |= GetEffectKeyAndUpdateStats(
drawState.getColorStage(s), gpu->glCaps(),
requiresLocalCoordAttrib, &b,
&effectKeySize, &readsDst,
&readFragPosition, &effectRequiresVertexShader);
effectKeySuccess |= (effectOffset <= SK_MaxU16);
offsetAndSize[0] = SkToU16(effectOffset);
offsetAndSize[1] = effectKeySize;
++offsetAndSizeIndex;
SkASSERT(!effectRequiresVertexShader);
}
}
if (!skipCoverage) {
for (int s = firstEffectiveCoverageStage; s < drawState.numCoverageStages(); ++s) {
uint16_t* offsetAndSize =
reinterpret_cast<uint16_t*>(desc->fKey.begin() + kEffectKeyOffsetsAndLengthOffset +
offsetAndSizeIndex * 2 * sizeof(uint16_t));
bool effectRequiresVertexShader = false;
GrEffectKeyBuilder b(&desc->fKey);
uint16_t effectKeySize;
uint32_t effectOffset = desc->fKey.count();
effectKeySuccess |= GetEffectKeyAndUpdateStats(
drawState.getCoverageStage(s), gpu->glCaps(),
requiresLocalCoordAttrib, &b,
&effectKeySize, &readsDst,
&readFragPosition, &effectRequiresVertexShader);
effectKeySuccess |= (effectOffset <= SK_MaxU16);
offsetAndSize[0] = SkToU16(effectOffset);
offsetAndSize[1] = effectKeySize;
++offsetAndSizeIndex;
SkASSERT(!effectRequiresVertexShader);
}
}
if (!effectKeySuccess) {
desc->fKey.reset();
return false;
}
// Because header is a pointer into the dynamic array, we can't push any new data into the key
// below here.
header->fRequiresVertexShader = requiresVertexShader || requiresLocalCoordAttrib;
header->fEmitsPointSize = GrGpu::kDrawPoints_DrawType == drawType;
// Currently the experimental GS will only work with triangle prims (and it doesn't do anything
// other than pass through values from the VS to the FS anyway).
#if GR_GL_EXPERIMENTAL_GS
#if 0
header->fExperimentalGS = gpu->caps().geometryShaderSupport();
#else
header->fExperimentalGS = false;
#endif
#endif
bool defaultToUniformInputs = GR_GL_NO_CONSTANT_ATTRIBUTES || gpu->caps()->pathRenderingSupport();
if (!inputColorIsUsed && !skipColor) {
header->fColorInput = kAllOnes_ColorInput;
} else if (defaultToUniformInputs && !requiresColorAttrib && inputColorIsUsed) {
header->fColorInput = kUniform_ColorInput;
} else {
header->fColorInput = kAttribute_ColorInput;
header->fRequiresVertexShader = true;
}
bool covIsSolidWhite = !requiresCoverageAttrib && 0xffffffff == drawState.getCoverageColor();
if ((covIsSolidWhite || !inputCoverageIsUsed) && !skipCoverage) {
header->fCoverageInput = kAllOnes_ColorInput;
} else if (defaultToUniformInputs && !requiresCoverageAttrib && inputCoverageIsUsed) {
header->fCoverageInput = kUniform_ColorInput;
} else {
header->fCoverageInput = kAttribute_ColorInput;
header->fRequiresVertexShader = true;
}
if (readsDst) {
SkASSERT(NULL != dstCopy || gpu->caps()->dstReadInShaderSupport());
const GrTexture* dstCopyTexture = NULL;
if (NULL != dstCopy) {
dstCopyTexture = dstCopy->texture();
}
header->fDstReadKey = GrGLFragmentShaderBuilder::KeyForDstRead(dstCopyTexture,
gpu->glCaps());
SkASSERT(0 != header->fDstReadKey);
} else {
header->fDstReadKey = 0;
}
if (readFragPosition) {
header->fFragPosKey = GrGLFragmentShaderBuilder::KeyForFragmentPosition(
drawState.getRenderTarget(), gpu->glCaps());
} else {
header->fFragPosKey = 0;
}
// Record attribute indices
header->fPositionAttributeIndex = drawState.positionAttributeIndex();
header->fLocalCoordAttributeIndex = drawState.localCoordAttributeIndex();
// For constant color and coverage we need an attribute with an index beyond those already set
int availableAttributeIndex = drawState.getVertexAttribCount();
if (requiresColorAttrib) {
header->fColorAttributeIndex = drawState.colorVertexAttributeIndex();
} else if (GrGLProgramDesc::kAttribute_ColorInput == header->fColorInput) {
SkASSERT(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
header->fColorAttributeIndex = availableAttributeIndex;
availableAttributeIndex++;
} else {
header->fColorAttributeIndex = -1;
}
if (requiresCoverageAttrib) {
header->fCoverageAttributeIndex = drawState.coverageVertexAttributeIndex();
} else if (GrGLProgramDesc::kAttribute_ColorInput == header->fCoverageInput) {
SkASSERT(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
header->fCoverageAttributeIndex = availableAttributeIndex;
} else {
header->fCoverageAttributeIndex = -1;
}
// Here we deal with whether/how we handle color and coverage separately.
// Set this default and then possibly change our mind if there is coverage.
header->fCoverageOutput = kModulate_CoverageOutput;
// If we do have coverage determine whether it matters.
bool separateCoverageFromColor = drawState.hasGeometryProcessor();
if (!drawState.isCoverageDrawing() && !skipCoverage &&
(drawState.numCoverageStages() > 0 ||
drawState.hasGeometryProcessor() ||
requiresCoverageAttrib)) {
if (gpu->caps()->dualSourceBlendingSupport() &&
!(blendOpts & (GrDrawState::kEmitCoverage_BlendOptFlag |
GrDrawState::kCoverageAsAlpha_BlendOptFlag))) {
if (kZero_GrBlendCoeff == dstCoeff) {
// write the coverage value to second color
header->fCoverageOutput = kSecondaryCoverage_CoverageOutput;
separateCoverageFromColor = true;
} else if (kSA_GrBlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
header->fCoverageOutput = kSecondaryCoverageISA_CoverageOutput;
separateCoverageFromColor = true;
} else if (kSC_GrBlendCoeff == dstCoeff) {
// SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
header->fCoverageOutput = kSecondaryCoverageISC_CoverageOutput;
separateCoverageFromColor = true;
}
} else if (readsDst &&
kOne_GrBlendCoeff == srcCoeff &&
kZero_GrBlendCoeff == dstCoeff) {
header->fCoverageOutput = kCombineWithDst_CoverageOutput;
separateCoverageFromColor = true;
}
}
if (!skipColor) {
for (int s = firstEffectiveColorStage; s < drawState.numColorStages(); ++s) {
colorStages->push_back(&drawState.getColorStage(s));
}
}
if (!skipCoverage) {
SkTArray<const GrEffectStage*, true>* array;
if (separateCoverageFromColor) {
array = coverageStages;
} else {
array = colorStages;
}
for (int s = firstEffectiveCoverageStage; s < drawState.numCoverageStages(); ++s) {
array->push_back(&drawState.getCoverageStage(s));
}
}
header->fColorEffectCnt = colorStages->count();
header->fCoverageEffectCnt = coverageStages->count();
desc->finalize();
return true;
}
void GrDistanceFieldTextContext::flush() {
if (NULL == fDrawTarget) {
return;
}
if (fCurrVertex > 0) {
GrDrawState drawState;
drawState.setFromPaint(fPaint, fContext->getMatrix(), fContext->getRenderTarget());
bool useColorVerts = !fUseLCDText;
set_vertex_attributes(&drawState, useColorVerts);
// setup our sampler state for our text texture/atlas
SkASSERT(SkIsAlign4(fCurrVertex));
// get our current color
SkColor filteredColor;
SkColorFilter* colorFilter = fSkPaint.getColorFilter();
if (colorFilter) {
filteredColor = colorFilter->filterColor(fSkPaint.getColor());
} else {
filteredColor = fSkPaint.getColor();
}
this->setupCoverageEffect(filteredColor);
// Effects could be stored with one of the cache objects (atlas?)
drawState.setGeometryProcessor(fCachedGeometryProcessor.get());
// Set draw state
if (fUseLCDText) {
GrColor colorNoPreMul = skcolor_to_grcolor_nopremultiply(filteredColor);
if (kOne_GrBlendCoeff != fPaint.getSrcBlendCoeff() ||
kISA_GrBlendCoeff != fPaint.getDstBlendCoeff() ||
fPaint.numColorStages()) {
SkDebugf("LCD Text will not draw correctly.\n");
}
SkASSERT(!drawState.hasColorVertexAttribute());
// We don't use the GrPaint's color in this case because it's been premultiplied by
// alpha. Instead we feed in a non-premultiplied color, and multiply its alpha by
// the mask texture color. The end result is that we get
// mask*paintAlpha*paintColor + (1-mask*paintAlpha)*dstColor
int a = SkColorGetA(fSkPaint.getColor());
// paintAlpha
drawState.setColor(SkColorSetARGB(a, a, a, a));
// paintColor
drawState.setBlendConstant(colorNoPreMul);
drawState.setBlendFunc(kConstC_GrBlendCoeff, kISC_GrBlendCoeff);
} else {
if (0xFF == GrColorUnpackA(fPaint.getColor())) {
drawState.setHint(GrDrawState::kVertexColorsAreOpaque_Hint, true);
}
// set back to normal in case we took LCD path previously.
drawState.setBlendFunc(fPaint.getSrcBlendCoeff(), fPaint.getDstBlendCoeff());
// We're using per-vertex color.
SkASSERT(drawState.hasColorVertexAttribute());
}
int nGlyphs = fCurrVertex / kVerticesPerGlyph;
fDrawTarget->setIndexSourceToBuffer(fContext->getQuadIndexBuffer());
fDrawTarget->drawIndexedInstances(&drawState,
kTriangles_GrPrimitiveType,
nGlyphs,
kVerticesPerGlyph,
kIndicesPerGlyph,
&fVertexBounds);
fDrawTarget->resetVertexSource();
fVertices = NULL;
fTotalVertexCount -= fCurrVertex;
fCurrVertex = 0;
SkSafeSetNull(fCurrTexture);
fVertexBounds.setLargestInverted();
}
}
void GrBitmapTextContext::flushGlyphs() {
if (NULL == fDrawTarget) {
return;
}
GrDrawState* drawState = fDrawTarget->drawState();
GrDrawState::AutoRestoreEffects are(drawState);
drawState->setFromPaint(fPaint, SkMatrix::I(), fContext->getRenderTarget());
if (fCurrVertex > 0) {
// setup our sampler state for our text texture/atlas
SkASSERT(SkIsAlign4(fCurrVertex));
SkASSERT(fCurrTexture);
GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kNone_FilterMode);
uint32_t textureUniqueID = fCurrTexture->getUniqueID();
if (textureUniqueID != fEffectTextureUniqueID) {
fCachedEffect.reset(GrCustomCoordsTextureEffect::Create(fCurrTexture, params));
fEffectTextureUniqueID = textureUniqueID;
}
// This effect could be stored with one of the cache objects (atlas?)
int coordsIdx = drawState->hasColorVertexAttribute() ? kGlyphCoordsWithColorAttributeIndex :
kGlyphCoordsNoColorAttributeIndex;
drawState->addCoverageEffect(fCachedEffect.get(), coordsIdx);
SkASSERT(NULL != fStrike);
switch (fStrike->getMaskFormat()) {
// Color bitmap text
case kARGB_GrMaskFormat:
SkASSERT(!drawState->hasColorVertexAttribute());
drawState->setBlendFunc(fPaint.getSrcBlendCoeff(), fPaint.getDstBlendCoeff());
drawState->setColor(0xffffffff);
break;
// LCD text
case kA888_GrMaskFormat:
case kA565_GrMaskFormat: {
if (kOne_GrBlendCoeff != fPaint.getSrcBlendCoeff() ||
kISA_GrBlendCoeff != fPaint.getDstBlendCoeff() ||
fPaint.numColorStages()) {
GrPrintf("LCD Text will not draw correctly.\n");
}
SkASSERT(!drawState->hasColorVertexAttribute());
// We don't use the GrPaint's color in this case because it's been premultiplied by
// alpha. Instead we feed in a non-premultiplied color, and multiply its alpha by
// the mask texture color. The end result is that we get
// mask*paintAlpha*paintColor + (1-mask*paintAlpha)*dstColor
int a = SkColorGetA(fSkPaint.getColor());
// paintAlpha
drawState->setColor(SkColorSetARGB(a, a, a, a));
// paintColor
drawState->setBlendConstant(skcolor_to_grcolor_nopremultiply(fSkPaint.getColor()));
drawState->setBlendFunc(kConstC_GrBlendCoeff, kISC_GrBlendCoeff);
break;
}
// Grayscale/BW text
case kA8_GrMaskFormat:
// set back to normal in case we took LCD path previously.
drawState->setBlendFunc(fPaint.getSrcBlendCoeff(), fPaint.getDstBlendCoeff());
// We're using per-vertex color.
SkASSERT(drawState->hasColorVertexAttribute());
break;
default:
SkFAIL("Unexepected mask format.");
}
int nGlyphs = fCurrVertex / 4;
fDrawTarget->setIndexSourceToBuffer(fContext->getQuadIndexBuffer());
fDrawTarget->drawIndexedInstances(kTriangles_GrPrimitiveType,
nGlyphs,
4, 6, &fVertexBounds);
fDrawTarget->resetVertexSource();
fVertices = NULL;
fMaxVertices = 0;
fCurrVertex = 0;
fVertexBounds.setLargestInverted();
SkSafeSetNull(fCurrTexture);
}
}
