src/gpu/batches/GrDrawPathBatch.cpp - skia - Git at Google

 /*
  * 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"

 #include "GrRenderTargetPriv.h"

 static void pre_translate_transform_values(const float* xforms,
                                            GrPathRendering::PathTransformType type, int count,
                                            SkScalar x, SkScalar y, float* dst);

 void GrDrawPathBatchBase::onPrepare(GrBatchFlushState*) {
     const GrRenderTargetPriv& rtPriv = this->pipeline()->getRenderTarget()->renderTargetPriv();
     fStencilPassSettings.reset(GrPathRendering::GetStencilPassSettings(fFillType),
                                this->pipeline()->hasStencilClip(), rtPriv.numStencilBits());
 }

 SkString GrDrawPathBatch::dumpInfo() const {
     SkString string;
     string.printf("PATH: 0x%p", fPath.get());
     string.append(INHERITED::dumpInfo());
     return string;
 }

 void GrDrawPathBatch::onDraw(GrBatchFlushState* state, const SkRect& bounds) {
     GrProgramDesc  desc;

     sk_sp<GrPathProcessor> pathProc(GrPathProcessor::Create(this->color(),
                                                             this->overrides(),
                                                             this->viewMatrix()));
     state->gpu()->pathRendering()->drawPath(*this->pipeline(), *pathProc,
                                             this->stencilPassSettings(), 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("]");
     string.append(INHERITED::dumpInfo());
     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);
     this->setBounds(bounds, HasAABloat::kNo, IsZeroArea::kNo);
 }

 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())) {
         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() ||
         GrPathRendering::kWinding_FillType != that->fillType() ||
         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.release());
         draw->fX = head->fX;
         draw->fY = head->fY;
         that->fDraws.popHead();
     }
     this->joinBounds(*that);
     return true;
 }

 void GrDrawPathRangeBatch::onDraw(GrBatchFlushState* state, const SkRect& bounds) {
     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);

     sk_sp<GrPathProcessor> pathProc(GrPathProcessor::Create(this->color(),
                                                             this->overrides(),
                                                             drawMatrix,
                                                             localMatrix));

     if (fDraws.count() == 1) {
         const InstanceData& instances = *head.fInstanceData;
         state->gpu()->pathRendering()->drawPaths(*this->pipeline(),
                                                  *pathProc,
                                                  this->stencilPassSettings(),
                                                  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(*this->pipeline(),
                                                  *pathProc,
                                                  this->stencilPassSettings(),
                                                  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;
     }
 }
	/*
	* 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"

	#include "GrRenderTargetPriv.h"

	static void pre_translate_transform_values(const float* xforms,
	GrPathRendering::PathTransformType type, int count,
	SkScalar x, SkScalar y, float* dst);

	void GrDrawPathBatchBase::onPrepare(GrBatchFlushState*) {
	const GrRenderTargetPriv& rtPriv = this->pipeline()->getRenderTarget()->renderTargetPriv();
	fStencilPassSettings.reset(GrPathRendering::GetStencilPassSettings(fFillType),
	this->pipeline()->hasStencilClip(), rtPriv.numStencilBits());
	}

	SkString GrDrawPathBatch::dumpInfo() const {
	SkString string;
	string.printf("PATH: 0x%p", fPath.get());
	string.append(INHERITED::dumpInfo());
	return string;
	}

	void GrDrawPathBatch::onDraw(GrBatchFlushState* state, const SkRect& bounds) {
	GrProgramDesc desc;

	sk_sp<GrPathProcessor> pathProc(GrPathProcessor::Create(this->color(),
	this->overrides(),
	this->viewMatrix()));
	state->gpu()->pathRendering()->drawPath(this->pipeline(), pathProc,
	this->stencilPassSettings(), 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("]");
	string.append(INHERITED::dumpInfo());
	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);
	this->setBounds(bounds, HasAABloat::kNo, IsZeroArea::kNo);
	}

	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())) {
	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() \|\|
	GrPathRendering::kWinding_FillType != that->fillType() \|\|
	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.release());
	draw->fX = head->fX;
	draw->fY = head->fY;
	that->fDraws.popHead();
	}
	this->joinBounds(*that);
	return true;
	}

	void GrDrawPathRangeBatch::onDraw(GrBatchFlushState* state, const SkRect& bounds) {
	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);

	sk_sp<GrPathProcessor> pathProc(GrPathProcessor::Create(this->color(),
	this->overrides(),
	drawMatrix,
	localMatrix));

	if (fDraws.count() == 1) {
	const InstanceData& instances = *head.fInstanceData;
	state->gpu()->pathRendering()->drawPaths(*this->pipeline(),
	*pathProc,
	this->stencilPassSettings(),
	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(*this->pipeline(),
	*pathProc,
	this->stencilPassSettings(),
	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;
	}
	}