bool GrPorterDuffXPFactory::SrcOverWillNeedDstTexture(const GrCaps& caps,
const GrPipelineOptimizations& optimizations) {
if (caps.shaderCaps()->dstReadInShaderSupport() ||
caps.shaderCaps()->dualSourceBlendingSupport()) {
return false;
}
// When we have four channel coverage we always need to read the dst in order to correctly
// blend. The one exception is when we are using srcover mode and we know the input color
// into the XP.
if (optimizations.fCoveragePOI.isFourChannelOutput()) {
if (kRGBA_GrColorComponentFlags == optimizations.fColorPOI.validFlags() &&
!caps.shaderCaps()->dstReadInShaderSupport()) {
return false;
}
return get_lcd_blend_formula(optimizations.fCoveragePOI,
SkBlendMode::kSrcOver).hasSecondaryOutput();
}
// We fallback on the shader XP when the blend formula would use dual source blending but we
// don't have support for it.
static const bool kHasMixedSamples = false;
SkASSERT(!caps.usesMixedSamples()); // We never use mixed samples without dual source blending.
return get_blend_formula(optimizations.fColorPOI, optimizations.fCoveragePOI,
kHasMixedSamples, SkBlendMode::kSrcOver).hasSecondaryOutput();
}
bool GrXPFactory::willNeedDstTexture(const GrCaps& caps,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI,
bool hasMixedSamples) const {
return (this->willReadDstColor(caps, colorPOI, coveragePOI, hasMixedSamples) &&
!caps.shaderCaps()->dstReadInShaderSupport());
}
bool GrPorterDuffXPFactory::willReadDstColor(const GrCaps& caps,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI) const {
if (coveragePOI.isFourChannelOutput()) {
return false; // The LCD XP never does a dst read.
}
// We fallback on the shader XP when the blend formula would use dual source blending but we
// don't have support for it.
return !caps.shaderCaps()->dualSourceBlendingSupport() &&
get_blend_formula(fXfermode, colorPOI, coveragePOI).hasSecondaryOutput();
}
sk_sp<const GrXferProcessor> GrXPFactory::MakeXferProcessor(const GrXPFactory* factory,
const GrProcessorAnalysisColor& color,
GrProcessorAnalysisCoverage coverage,
bool hasMixedSamples,
const GrCaps& caps) {
SkASSERT(!hasMixedSamples || caps.shaderCaps()->dualSourceBlendingSupport());
if (factory) {
return factory->makeXferProcessor(color, coverage, hasMixedSamples, caps);
} else {
return GrPorterDuffXPFactory::MakeSrcOverXferProcessor(color, coverage, hasMixedSamples,
caps);
}
}
bool GrPorterDuffXPFactory::willReadDstColor(const GrCaps& caps,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& covPOI,
bool hasMixedSamples) const {
if (caps.shaderCaps()->dualSourceBlendingSupport()) {
return false;
}
if (covPOI.isFourChannelOutput()) {
return false; // The LCD XP will abort rather than doing a dst read.
}
// We fallback on the shader XP when the blend formula would use dual source blending but we
// don't have support for it.
return get_blend_formula(colorPOI, covPOI, hasMixedSamples, fXfermode).hasSecondaryOutput();
}
bool GrPorterDuffXPFactory::willReadDstColor(const GrCaps& caps,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& covPOI,
bool hasMixedSamples) const {
if (caps.shaderCaps()->dualSourceBlendingSupport()) {
return false;
}
// When we have four channel coverage we always need to read the dst in order to correctly
// blend. The one exception is when we are using srcover mode and we know the input color into
// the XP.
if (covPOI.isFourChannelOutput()) {
if (SkXfermode::kSrcOver_Mode == fXfermode &&
kRGBA_GrColorComponentFlags == colorPOI.validFlags() &&
!caps.shaderCaps()->dstReadInShaderSupport()) {
return false;
}
return get_lcd_blend_formula(covPOI, fXfermode).hasSecondaryOutput();
}
// We fallback on the shader XP when the blend formula would use dual source blending but we
// don't have support for it.
return get_blend_formula(colorPOI, covPOI, hasMixedSamples, fXfermode).hasSecondaryOutput();
}
GrXPFactory::AnalysisProperties GrXPFactory::GetAnalysisProperties(
const GrXPFactory* factory,
const GrProcessorAnalysisColor& color,
const GrProcessorAnalysisCoverage& coverage,
const GrCaps& caps) {
AnalysisProperties result;
if (factory) {
result = factory->analysisProperties(color, coverage, caps);
} else {
result = GrPorterDuffXPFactory::SrcOverAnalysisProperties(color, coverage, caps);
}
SkASSERT(!(result & AnalysisProperties::kRequiresDstTexture));
if ((result & AnalysisProperties::kReadsDstInShader) &&
!caps.shaderCaps()->dstReadInShaderSupport()) {
result |= AnalysisProperties::kRequiresDstTexture;
if (caps.textureBarrierSupport()) {
result |= AnalysisProperties::kRequiresBarrierBetweenOverlappingDraws;
}
}
return result;
}
bool GrXPFactory::willNeedDstTexture(const GrCaps& caps,
const GrPipelineOptimizations& optimizations,
bool hasMixedSamples) const {
return (this->willReadDstColor(caps, optimizations, hasMixedSamples) &&
!caps.shaderCaps()->dstReadInShaderSupport());
}
std::unique_ptr<GrFillRRectOp> GrFillRRectOp::Make(
GrRecordingContext* ctx, GrAAType aaType, const SkMatrix& viewMatrix, const SkRRect& rrect,
const GrCaps& caps, GrPaint&& paint) {
if (!caps.instanceAttribSupport()) {
return nullptr;
}
Flags flags = Flags::kNone;
if (GrAAType::kCoverage == aaType) {
// TODO: Support perspective in a follow-on CL. This shouldn't be difficult, since we
// already use HW derivatives. The only trick will be adjusting the AA outset to account for
// perspective. (i.e., outset = 0.5 * z.)
if (viewMatrix.hasPerspective()) {
return nullptr;
}
if (can_use_hw_derivatives_with_coverage(*caps.shaderCaps(), viewMatrix, rrect)) {
// HW derivatives (more specifically, fwidth()) are consistently faster on all platforms
// in coverage mode. We use them as long as the approximation will be accurate enough.
flags |= Flags::kUseHWDerivatives;
}
} else {
if (GrAAType::kMSAA == aaType) {
if (!caps.sampleLocationsSupport() || !caps.shaderCaps()->sampleVariablesSupport()) {
return nullptr;
}
}
if (viewMatrix.hasPerspective()) {
// HW derivatives are consistently slower on all platforms in sample mask mode. We
// therefore only use them when there is perspective, since then we can't interpolate
// the symbolic screen-space gradient.
flags |= Flags::kUseHWDerivatives | Flags::kHasPerspective;
}
}
// Produce a matrix that draws the round rect from normalized [-1, -1, +1, +1] space.
float l = rrect.rect().left(), r = rrect.rect().right(),
t = rrect.rect().top(), b = rrect.rect().bottom();
SkMatrix m;
// Unmap the normalized rect [-1, -1, +1, +1] back to [l, t, r, b].
m.setScaleTranslate((r - l)/2, (b - t)/2, (l + r)/2, (t + b)/2);
// Map to device space.
m.postConcat(viewMatrix);
SkRect devBounds;
if (!(flags & Flags::kHasPerspective)) {
// Since m is an affine matrix that maps the rect [-1, -1, +1, +1] into the shape's
// device-space quad, it's quite simple to find the bounding rectangle:
devBounds = SkRect::MakeXYWH(m.getTranslateX(), m.getTranslateY(), 0, 0);
devBounds.outset(SkScalarAbs(m.getScaleX()) + SkScalarAbs(m.getSkewX()),
SkScalarAbs(m.getSkewY()) + SkScalarAbs(m.getScaleY()));
} else {
viewMatrix.mapRect(&devBounds, rrect.rect());
}
if (GrAAType::kMSAA == aaType && caps.preferTrianglesOverSampleMask()) {
// We are on a platform that prefers fine triangles instead of using the sample mask. See if
// the round rect is large enough that it will be faster for us to send it off to the
// default path renderer instead. The 200x200 threshold was arrived at using the
// "shapes_rrect" benchmark on an ARM Galaxy S9.
if (devBounds.height() * devBounds.width() > 200 * 200) {
return nullptr;
}
}
GrOpMemoryPool* pool = ctx->priv().opMemoryPool();
return pool->allocate<GrFillRRectOp>(aaType, rrect, flags, m, std::move(paint), devBounds);
}