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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrDrawPathBatch.h"
SkString GrDrawPathBatch::dumpInfo() const {
SkString string;
string.printf("PATH: 0x%p", fPath.get());
return string;
}
void GrDrawPathBatch::onDraw(GrBatchFlushState* state) {
GrProgramDesc desc;
SkAutoTUnref<GrPathProcessor> pathProc(GrPathProcessor::Create(this->color(),
this->opts(),
this->viewMatrix()));
state->gpu()->buildProgramDesc(&desc, *pathProc, *this->pipeline());
GrPathRendering::DrawPathArgs args(pathProc, this->pipeline(),
&desc, &this->stencilSettings());
state->gpu()->pathRendering()->drawPath(args, fPath.get());
}
GrDrawPathRangeBatch::~GrDrawPathRangeBatch() {
for (DrawList::Iter iter(fDraws); iter.get(); iter.next()) {
(*iter.get())->unref();
}
}
SkString GrDrawPathRangeBatch::dumpInfo() const {
SkString string;
string.printf("RANGE: 0x%p COUNTS: [", *fDraws.head());
for (DrawList::Iter iter(fDraws); iter.get(); iter.next()) {
string.appendf("%d ,", (*iter.get())->count());
}
string.remove(string.size() - 2, 2);
string.append("]");
return string;
}
bool GrDrawPathRangeBatch::isWinding() const {
static const GrStencilSettings::Face pathFace = GrStencilSettings::kFront_Face;
bool isWinding = kInvert_StencilOp != this->stencilSettings().passOp(pathFace);
if (isWinding) {
// Double check that it is in fact winding.
SkASSERT(kIncClamp_StencilOp == this->stencilSettings().passOp(pathFace));
SkASSERT(kIncClamp_StencilOp == this->stencilSettings().failOp(pathFace));
SkASSERT(0x1 != this->stencilSettings().writeMask(pathFace));
SkASSERT(!this->stencilSettings().isTwoSided());
}
return isWinding;
}
GrDrawPathRangeBatch::GrDrawPathRangeBatch(const SkMatrix& viewMatrix, const SkMatrix& localMatrix,
GrColor color, GrPathRange* range, GrPathRangeDraw* draw)
: INHERITED(ClassID(), viewMatrix, color)
, fPathRange(range)
, fLocalMatrix(localMatrix) {
SkDEBUGCODE(draw->fUsedInBatch = true;)
fDraws.addToHead(SkRef(draw));
fTotalPathCount = draw->count();
// Don't compute a bounding box. For dst copy texture, we'll opt instead for it to just copy
// the entire dst. Realistically this is a moot point, because any context that supports
// NV_path_rendering will also support NV_blend_equation_advanced.
// For clipping we'll just skip any optimizations based on the bounds.
fBounds.setLargest();
}
bool GrDrawPathRangeBatch::onCombineIfPossible(GrBatch* t, const GrCaps& caps) {
GrDrawPathRangeBatch* that = t->cast<GrDrawPathRangeBatch>();
if (this->fPathRange.get() != that->fPathRange.get()) {
return false;
}
if (!GrPathRangeDraw::CanMerge(**this->fDraws.head(), **that->fDraws.head())) {
return false;
}
if (!GrPipeline::AreEqual(*this->pipeline(), *that->pipeline(), false)) {
return false;
}
if (this->color() != that->color() ||
!this->viewMatrix().cheapEqualTo(that->viewMatrix()) ||
!fLocalMatrix.cheapEqualTo(that->fLocalMatrix)) {
return false;
}
// TODO: Check some other things here. (winding, opaque, pathProc color, vm, ...)
// Try to combine this call with the previous DrawPaths. We do this by stenciling all the
// paths together and then covering them in a single pass. This is not equivalent to two
// separate draw calls, so we can only do it if there is no blending (no overlap would also
// work). Note that it's also possible for overlapping paths to cancel each other's winding
// numbers, and we only partially account for this by not allowing even/odd paths to be
// combined. (Glyphs in the same font tend to wind the same direction so it works out OK.)
if (!this->isWinding() ||
this->stencilSettings() != that->stencilSettings() ||
this->opts().willColorBlendWithDst()) {
return false;
}
SkASSERT(!that->opts().willColorBlendWithDst());
fTotalPathCount += that->fTotalPathCount;
while (GrPathRangeDraw** head = that->fDraws.head()) {
fDraws.addToTail(*head);
// We're stealing that's refs, so pop without unreffing.
that->fDraws.popHead();
}
return true;
}
void GrDrawPathRangeBatch::onDraw(GrBatchFlushState* state) {
GrProgramDesc desc;
SkAutoTUnref<GrPathProcessor> pathProc(GrPathProcessor::Create(this->color(),
this->opts(),
this->viewMatrix(),
fLocalMatrix));
state->gpu()->buildProgramDesc(&desc, *pathProc, *this->pipeline());
GrPathRendering::DrawPathArgs args(pathProc, this->pipeline(),
&desc, &this->stencilSettings());
if (fDraws.count() == 1) {
const GrPathRangeDraw& draw = **fDraws.head();
state->gpu()->pathRendering()->drawPaths(args, fPathRange.get(), draw.indices(),
GrPathRange::kU16_PathIndexType, draw.transforms(), draw.transformType(),
draw.count());
return;
}
GrPathRendering::PathTransformType transformType = (*fDraws.head())->transformType();
int floatsPerTransform = GrPathRendering::PathTransformSize(transformType);
SkAutoSTMalloc<512, float> transformStorage(floatsPerTransform * fTotalPathCount);
SkAutoSTMalloc<256, uint16_t> indexStorage(fTotalPathCount);
uint16_t* indices = indexStorage.get();
float* transforms = transformStorage.get();
for (DrawList::Iter iter(fDraws); iter.get(); iter.next()) {
SkASSERT((*iter.get())->transformType() == transformType);
int cnt = (*iter.get())->count();
memcpy(indices, (*iter.get())->indices(), cnt * sizeof(uint16_t));
indices += cnt;
memcpy(transforms, (*iter.get())->transforms(), cnt * floatsPerTransform * sizeof(float));
transforms += cnt * floatsPerTransform;
}
SkASSERT(indices - indexStorage.get() == fTotalPathCount);
state->gpu()->pathRendering()->drawPaths(args, fPathRange.get(), indexStorage.get(),
GrPathRange::kU16_PathIndexType, transformStorage.get(), transformType,
fTotalPathCount);
}
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