/*
* This method traverses the clip stack to see if the GrSoftwarePathRenderer
* will be used on any element. If so, it returns true to indicate that the
* entire clip should be rendered in SW and then uploaded en masse to the gpu.
*/
bool GrClipMaskManager::UseSWOnlyPath(GrContext* context,
const GrPipelineBuilder& pipelineBuilder,
const GrRenderTarget* rt,
const SkVector& clipToMaskOffset,
const GrReducedClip::ElementList& elements) {
// TODO: generalize this function so that when
// a clip gets complex enough it can just be done in SW regardless
// of whether it would invoke the GrSoftwarePathRenderer.
// Set the matrix so that rendered clip elements are transformed to mask space from clip
// space.
const SkMatrix translate = SkMatrix::MakeTrans(clipToMaskOffset.fX, clipToMaskOffset.fY);
for (GrReducedClip::ElementList::Iter iter(elements.headIter()); iter.get(); iter.next()) {
const Element* element = iter.get();
SkRegion::Op op = element->getOp();
bool invert = element->isInverseFilled();
bool needsStencil = invert ||
SkRegion::kIntersect_Op == op || SkRegion::kReverseDifference_Op == op;
if (PathNeedsSWRenderer(context, pipelineBuilder.getStencil().isDisabled(),
rt, translate, element, nullptr, needsStencil)) {
return true;
}
}
return false;
}
void GrClipMaskManager::setPipelineBuilderStencil(const GrPipelineBuilder& pipelineBuilder,
GrPipelineBuilder::AutoRestoreStencil* ars) {
// We make two copies of the StencilSettings here (except in the early
// exit scenario. One copy from draw state to the stack var. Then another
// from the stack var to the gpu. We could make this class hold a ptr to
// GrGpu's fStencilSettings and eliminate the stack copy here.
// use stencil for clipping if clipping is enabled and the clip
// has been written into the stencil.
GrStencilSettings settings;
// The GrGpu client may not be using the stencil buffer but we may need to
// enable it in order to respect a stencil clip.
if (pipelineBuilder.getStencil().isDisabled()) {
if (GrClipMaskManager::kRespectClip_StencilClipMode == fClipMode) {
settings = basic_apply_stencil_clip_settings();
} else {
return;
}
} else {
settings = pipelineBuilder.getStencil();
}
int stencilBits = 0;
GrRenderTarget* rt = pipelineBuilder.getRenderTarget();
GrStencilAttachment* stencilAttachment =
fDrawTarget->cmmAccess().resourceProvider()->attachStencilAttachment(rt);
if (stencilAttachment) {
stencilBits = stencilAttachment->bits();
}
SkASSERT(fDrawTarget->caps()->stencilWrapOpsSupport() || !settings.usesWrapOp());
SkASSERT(fDrawTarget->caps()->twoSidedStencilSupport() || !settings.isTwoSided());
this->adjustStencilParams(&settings, fClipMode, stencilBits);
ars->set(&pipelineBuilder);
ars->setStencil(settings);
}
GrPipeline::GrPipeline(const GrPipelineBuilder& pipelineBuilder,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI,
const GrDrawTargetCaps& caps,
const GrScissorState& scissorState,
const GrDeviceCoordTexture* dstCopy) {
// Create XferProcessor from DS's XPFactory
SkAutoTUnref<GrXferProcessor> xferProcessor(
pipelineBuilder.getXPFactory()->createXferProcessor(colorPOI, coveragePOI, dstCopy, caps));
GrColor overrideColor = GrColor_ILLEGAL;
if (colorPOI.firstEffectiveStageIndex() != 0) {
overrideColor = colorPOI.inputColorToEffectiveStage();
}
GrXferProcessor::OptFlags optFlags;
if (xferProcessor) {
fXferProcessor.reset(xferProcessor.get());
optFlags = xferProcessor->getOptimizations(colorPOI,
coveragePOI,
pipelineBuilder.getStencil().doesWrite(),
&overrideColor,
caps);
}
// When path rendering the stencil settings are not always set on the GrPipelineBuilder
// so we must check the draw type. In cases where we will skip drawing we simply return a
// null GrPipeline.
if (!xferProcessor || (GrXferProcessor::kSkipDraw_OptFlag & optFlags)) {
// Set the fields that don't default init and return. The lack of a render target will
// indicate that this can be skipped.
fFlags = 0;
fDrawFace = GrPipelineBuilder::kInvalid_DrawFace;
return;
}
fRenderTarget.reset(pipelineBuilder.fRenderTarget.get());
SkASSERT(fRenderTarget);
fScissorState = scissorState;
fStencilSettings = pipelineBuilder.getStencil();
fDrawFace = pipelineBuilder.getDrawFace();
fFlags = 0;
if (pipelineBuilder.isHWAntialias()) {
fFlags |= kHWAA_Flag;
}
if (pipelineBuilder.isDither()) {
fFlags |= kDither_Flag;
}
if (pipelineBuilder.snapVerticesToPixelCenters()) {
fFlags |= kSnapVertices_Flag;
}
int firstColorStageIdx = colorPOI.firstEffectiveStageIndex();
// TODO: Once we can handle single or four channel input into coverage stages then we can use
// GrPipelineBuilder's coverageProcInfo (like color above) to set this initial information.
int firstCoverageStageIdx = 0;
this->adjustProgramFromOptimizations(pipelineBuilder, optFlags, colorPOI, coveragePOI,
&firstColorStageIdx, &firstCoverageStageIdx);
bool usesLocalCoords = false;
// Copy Stages from PipelineBuilder to Pipeline
for (int i = firstColorStageIdx; i < pipelineBuilder.numColorFragmentStages(); ++i) {
SkNEW_APPEND_TO_TARRAY(&fFragmentStages,
GrPendingFragmentStage,
(pipelineBuilder.fColorStages[i]));
usesLocalCoords = usesLocalCoords ||
pipelineBuilder.fColorStages[i].processor()->usesLocalCoords();
}
fNumColorStages = fFragmentStages.count();
for (int i = firstCoverageStageIdx; i < pipelineBuilder.numCoverageFragmentStages(); ++i) {
SkNEW_APPEND_TO_TARRAY(&fFragmentStages,
GrPendingFragmentStage,
(pipelineBuilder.fCoverageStages[i]));
usesLocalCoords = usesLocalCoords ||
pipelineBuilder.fCoverageStages[i].processor()->usesLocalCoords();
}
// let the GP init the batch tracker
fInitBT.fColorIgnored = SkToBool(optFlags & GrXferProcessor::kIgnoreColor_OptFlag);
fInitBT.fOverrideColor = fInitBT.fColorIgnored ? GrColor_ILLEGAL : overrideColor;
fInitBT.fCoverageIgnored = SkToBool(optFlags & GrXferProcessor::kIgnoreCoverage_OptFlag);
fInitBT.fUsesLocalCoords = usesLocalCoords;
fInitBT.fCanTweakAlphaForCoverage =
SkToBool(optFlags & GrXferProcessor::kCanTweakAlphaForCoverage_OptFlag);
}
bool GrStencilAndCoverPathRenderer::onDrawPath(const DrawPathArgs& args) {
SkASSERT(!args.fStroke->isHairlineStyle());
const SkPath& path = *args.fPath;
GrPipelineBuilder* pipelineBuilder = args.fPipelineBuilder;
const SkMatrix& viewMatrix = *args.fViewMatrix;
SkASSERT(pipelineBuilder->getStencil().isDisabled());
if (args.fAntiAlias) {
SkASSERT(pipelineBuilder->getRenderTarget()->isStencilBufferMultisampled());
pipelineBuilder->enableState(GrPipelineBuilder::kHWAntialias_Flag);
}
SkAutoTUnref<GrPath> p(get_gr_path(fResourceProvider, path, *args.fStroke));
if (path.isInverseFillType()) {
GR_STATIC_CONST_SAME_STENCIL(kInvertedStencilPass,
kKeep_StencilOp,
kZero_StencilOp,
// We know our rect will hit pixels outside the clip and the user bits will be 0
// outside the clip. So we can't just fill where the user bits are 0. We also need to
// check that the clip bit is set.
kEqualIfInClip_StencilFunc,
0xffff,
0x0000,
0xffff);
pipelineBuilder->setStencil(kInvertedStencilPass);
// fake inverse with a stencil and cover
SkAutoTUnref<GrPathProcessor> pp(GrPathProcessor::Create(GrColor_WHITE, viewMatrix));
args.fTarget->stencilPath(*pipelineBuilder, pp, p,
convert_skpath_filltype(path.getFillType()));
SkMatrix invert = SkMatrix::I();
SkRect bounds =
SkRect::MakeLTRB(0, 0, SkIntToScalar(pipelineBuilder->getRenderTarget()->width()),
SkIntToScalar(pipelineBuilder->getRenderTarget()->height()));
SkMatrix vmi;
// mapRect through persp matrix may not be correct
if (!viewMatrix.hasPerspective() && viewMatrix.invert(&vmi)) {
vmi.mapRect(&bounds);
// theoretically could set bloat = 0, instead leave it because of matrix inversion
// precision.
SkScalar bloat = viewMatrix.getMaxScale() * SK_ScalarHalf;
bounds.outset(bloat, bloat);
} else {
if (!viewMatrix.invert(&invert)) {
return false;
}
}
const SkMatrix& viewM = viewMatrix.hasPerspective() ? SkMatrix::I() : viewMatrix;
args.fTarget->drawNonAARect(*pipelineBuilder, args.fColor, viewM, bounds, invert);
} else {
GR_STATIC_CONST_SAME_STENCIL(kStencilPass,
kZero_StencilOp,
kKeep_StencilOp,
kNotEqual_StencilFunc,
0xffff,
0x0000,
0xffff);
pipelineBuilder->setStencil(kStencilPass);
SkAutoTUnref<GrPathProcessor> pp(GrPathProcessor::Create(args.fColor, viewMatrix));
args.fTarget->drawPath(*pipelineBuilder, pp, p,
convert_skpath_filltype(path.getFillType()));
}
pipelineBuilder->stencil()->setDisabled();
return true;
}
