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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"
static void pre_translate_transform_values(const float* xforms,
GrPathRendering::PathTransformType type, int count,
SkScalar x, SkScalar y, float* dst);
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->overrides(),
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());
}
SkString GrDrawPathRangeBatch::dumpInfo() const {
SkString string;
string.printf("RANGE: 0x%p COUNTS: [", fPathRange.get());
for (DrawList::Iter iter(fDraws); iter.get(); iter.next()) {
string.appendf("%d, ", iter.get()->fInstanceData->count());
}
string.remove(string.size() - 2, 2);
string.append("]");
return string;
}
GrDrawPathRangeBatch::GrDrawPathRangeBatch(const SkMatrix& viewMatrix, SkScalar scale, SkScalar x,
SkScalar y, GrColor color,
GrPathRendering::FillType fill, GrPathRange* range,
const InstanceData* instanceData, const SkRect& bounds)
: INHERITED(ClassID(), viewMatrix, color, fill)
, fPathRange(range)
, fTotalPathCount(instanceData->count())
, fScale(scale) {
fDraws.addToHead()->set(instanceData, x, y);
fBounds = bounds;
}
bool GrDrawPathRangeBatch::onCombineIfPossible(GrBatch* t, const GrCaps& caps) {
GrDrawPathRangeBatch* that = t->cast<GrDrawPathRangeBatch>();
if (this->fPathRange.get() != that->fPathRange.get() ||
this->transformType() != that->transformType() ||
this->fScale != that->fScale ||
this->color() != that->color() ||
!this->viewMatrix().cheapEqualTo(that->viewMatrix())) {
return false;
}
if (!GrPipeline::AreEqual(*this->pipeline(), *that->pipeline(), false)) {
return false;
}
switch (fDraws.head()->fInstanceData->transformType()) {
case GrPathRendering::kNone_PathTransformType:
if (this->fDraws.head()->fX != that->fDraws.head()->fX ||
this->fDraws.head()->fY != that->fDraws.head()->fY) {
return false;
}
break;
case GrPathRendering::kTranslateX_PathTransformType:
if (this->fDraws.head()->fY != that->fDraws.head()->fY) {
return false;
}
break;
case GrPathRendering::kTranslateY_PathTransformType:
if (this->fDraws.head()->fX != that->fDraws.head()->fX) {
return false;
}
break;
default: break;
}
// 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 (GrPathRendering::kWinding_FillType != this->fillType() ||
this->stencilSettings() != that->stencilSettings() ||
this->overrides().willColorBlendWithDst()) {
return false;
}
SkASSERT(!that->overrides().willColorBlendWithDst());
fTotalPathCount += that->fTotalPathCount;
while (Draw* head = that->fDraws.head()) {
Draw* draw = fDraws.addToTail();
draw->fInstanceData.reset(head->fInstanceData.detach());
draw->fX = head->fX;
draw->fY = head->fY;
that->fDraws.popHead();
}
return true;
}
void GrDrawPathRangeBatch::onDraw(GrBatchFlushState* state) {
const Draw& head = *fDraws.head();
SkMatrix drawMatrix(this->viewMatrix());
drawMatrix.preScale(fScale, fScale);
drawMatrix.preTranslate(head.fX, head.fY);
SkMatrix localMatrix;
localMatrix.setScale(fScale, fScale);
localMatrix.preTranslate(head.fX, head.fY);
SkAutoTUnref<GrPathProcessor> pathProc(GrPathProcessor::Create(this->color(),
this->overrides(),
drawMatrix,
localMatrix));
GrProgramDesc desc;
state->gpu()->buildProgramDesc(&desc, *pathProc, *this->pipeline());
GrPathRendering::DrawPathArgs args(pathProc, this->pipeline(),
&desc, &this->stencilSettings());
if (fDraws.count() == 1) {
const InstanceData& instances = *head.fInstanceData;
state->gpu()->pathRendering()->drawPaths(args, fPathRange.get(), instances.indices(),
GrPathRange::kU16_PathIndexType,
instances.transformValues(),
instances.transformType(),
instances.count());
} else {
int floatsPerTransform = GrPathRendering::PathTransformSize(this->transformType());
SkAutoSTMalloc<4096, float> transformStorage(floatsPerTransform * fTotalPathCount);
SkAutoSTMalloc<2048, uint16_t> indexStorage(fTotalPathCount);
int idx = 0;
for (DrawList::Iter iter(fDraws); iter.get(); iter.next()) {
const Draw& draw = *iter.get();
const InstanceData& instances = *draw.fInstanceData;
memcpy(&indexStorage[idx], instances.indices(), instances.count() * sizeof(uint16_t));
pre_translate_transform_values(instances.transformValues(), this->transformType(),
instances.count(),
draw.fX - head.fX, draw.fY - head.fY,
&transformStorage[floatsPerTransform * idx]);
idx += instances.count();
// TODO: Support mismatched transform types if we start using more types other than 2D.
SkASSERT(instances.transformType() == this->transformType());
}
SkASSERT(idx == fTotalPathCount);
state->gpu()->pathRendering()->drawPaths(args, fPathRange.get(), indexStorage,
GrPathRange::kU16_PathIndexType, transformStorage,
this->transformType(), fTotalPathCount);
}
}
inline void pre_translate_transform_values(const float* xforms,
GrPathRendering::PathTransformType type, int count,
SkScalar x, SkScalar y, float* dst) {
if (0 == x && 0 == y) {
memcpy(dst, xforms, count * GrPathRendering::PathTransformSize(type) * sizeof(float));
return;
}
switch (type) {
case GrPathRendering::kNone_PathTransformType:
SkFAIL("Cannot pre-translate kNone_PathTransformType.");
break;
case GrPathRendering::kTranslateX_PathTransformType:
SkASSERT(0 == y);
for (int i = 0; i < count; i++) {
dst[i] = xforms[i] + x;
}
break;
case GrPathRendering::kTranslateY_PathTransformType:
SkASSERT(0 == x);
for (int i = 0; i < count; i++) {
dst[i] = xforms[i] + y;
}
break;
case GrPathRendering::kTranslate_PathTransformType:
for (int i = 0; i < 2 * count; i += 2) {
dst[i] = xforms[i] + x;
dst[i + 1] = xforms[i + 1] + y;
}
break;
case GrPathRendering::kAffine_PathTransformType:
for (int i = 0; i < 6 * count; i += 6) {
dst[i] = xforms[i];
dst[i + 1] = xforms[i + 1];
dst[i + 2] = xforms[i] * x + xforms[i + 1] * y + xforms[i + 2];
dst[i + 3] = xforms[i + 3];
dst[i + 4] = xforms[i + 4];
dst[i + 5] = xforms[i + 3] * x + xforms[i + 4] * y + xforms[i + 5];
}
break;
default:
SkFAIL("Unknown transform type.");
break;
}
}
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