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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.
*/
#ifndef GrAAStrokeRectBatch_DEFINED
#define GrAAStrokeRectBatch_DEFINED
#include "GrColor.h"
#include "GrTypes.h"
#include "GrVertexBatch.h"
#include "SkMatrix.h"
#include "SkRect.h"
class GrResourceProvider;
class GrAAStrokeRectBatch : public GrVertexBatch {
public:
DEFINE_BATCH_CLASS_ID
// TODO support AA rotated stroke rects by copying around view matrices
struct Geometry {
GrColor fColor;
SkRect fDevOutside;
SkRect fDevOutsideAssist;
SkRect fDevInside;
bool fMiterStroke;
};
static GrDrawBatch* Create(const Geometry& geometry, const SkMatrix& viewMatrix) {
return new GrAAStrokeRectBatch(geometry, viewMatrix);
}
const char* name() const override { return "AAStrokeRect"; }
void getInvariantOutputColor(GrInitInvariantOutput* out) const override {
// When this is called on a batch, there is only one geometry bundle
out->setKnownFourComponents(fGeoData[0].fColor);
}
void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override {
out->setUnknownSingleComponent();
}
SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }
private:
void onPrepareDraws(Target*) override;
void initBatchTracker(const GrPipelineOptimizations&) override;
GrAAStrokeRectBatch(const Geometry& geometry, const SkMatrix& viewMatrix)
: INHERITED(ClassID()) {
fBatch.fViewMatrix = viewMatrix;
fGeoData.push_back(geometry);
// If we have miterstroke then we inset devOutside and outset devOutsideAssist, so we need
// the join for proper bounds
fBounds = geometry.fDevOutside;
fBounds.join(geometry.fDevOutsideAssist);
}
static const int kMiterIndexCnt = 3 * 24;
static const int kMiterVertexCnt = 16;
static const int kNumMiterRectsInIndexBuffer = 256;
static const int kBevelIndexCnt = 48 + 36 + 24;
static const int kBevelVertexCnt = 24;
static const int kNumBevelRectsInIndexBuffer = 256;
static const GrIndexBuffer* GetIndexBuffer(GrResourceProvider* resourceProvider,
bool miterStroke);
GrColor color() const { return fBatch.fColor; }
bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; }
bool canTweakAlphaForCoverage() const { return fBatch.fCanTweakAlphaForCoverage; }
bool colorIgnored() const { return fBatch.fColorIgnored; }
const SkMatrix& viewMatrix() const { return fBatch.fViewMatrix; }
bool miterStroke() const { return fBatch.fMiterStroke; }
bool coverageIgnored() const { return fBatch.fCoverageIgnored; }
bool onCombineIfPossible(GrBatch* t, const GrCaps&) override;
void generateAAStrokeRectGeometry(void* vertices,
size_t offset,
size_t vertexStride,
int outerVertexNum,
int innerVertexNum,
GrColor color,
const SkRect& devOutside,
const SkRect& devOutsideAssist,
const SkRect& devInside,
bool miterStroke,
bool tweakAlphaForCoverage) const;
struct BatchTracker {
SkMatrix fViewMatrix;
GrColor fColor;
bool fUsesLocalCoords;
bool fColorIgnored;
bool fCoverageIgnored;
bool fMiterStroke;
bool fCanTweakAlphaForCoverage;
};
BatchTracker fBatch;
SkSTArray<1, Geometry, true> fGeoData;
typedef GrVertexBatch INHERITED;
};
#endif
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