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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 GrDrawPathOp_DEFINED
#define GrDrawPathOp_DEFINED
#include "GrDrawOp.h"
#include "GrGpu.h"
#include "GrOpFlushState.h"
#include "GrPath.h"
#include "GrPathProcessor.h"
#include "GrPathRendering.h"
#include "GrStencilSettings.h"
#include "SkTLList.h"
class GrDrawPathOpBase : public GrDrawOp {
protected:
GrDrawPathOpBase(uint32_t classID, const SkMatrix& viewMatrix, GrColor initialColor,
GrPathRendering::FillType fill)
: INHERITED(classID), fViewMatrix(viewMatrix), fColor(initialColor), fFillType(fill) {}
const GrStencilSettings& stencilPassSettings() const {
SkASSERT(!fStencilPassSettings.isDisabled()); // This shouldn't be called before onPrepare.
return fStencilPassSettings;
}
protected:
const SkMatrix& viewMatrix() const { return fViewMatrix; }
GrColor color() const { return fColor; }
GrPathRendering::FillType fillType() const { return fFillType; }
bool xpReadsDst() const { return fXPReadsDst; }
private:
void getFragmentProcessorAnalysisInputs(FragmentProcessorAnalysisInputs* input) const override {
input->colorInput()->setToConstant(fColor);
input->coverageInput()->setToSolidCoverage();
}
void applyPipelineOptimizations(const GrPipelineOptimizations& optimizations) override {
optimizations.getOverrideColorIfSet(&fColor);
fXPReadsDst = optimizations.xpReadsDst();
}
void onPrepare(GrOpFlushState*) override; // Initializes fStencilPassSettings.
SkMatrix fViewMatrix;
GrColor fColor;
GrPathRendering::FillType fFillType;
GrStencilSettings fStencilPassSettings;
bool fXPReadsDst;
typedef GrDrawOp INHERITED;
};
class GrDrawPathOp final : public GrDrawPathOpBase {
public:
DEFINE_OP_CLASS_ID
static std::unique_ptr<GrDrawOp> Make(const SkMatrix& viewMatrix, GrColor color,
const GrPath* path) {
return std::unique_ptr<GrDrawOp>(new GrDrawPathOp(viewMatrix, color, path));
}
const char* name() const override { return "DrawPath"; }
SkString dumpInfo() const override;
private:
GrDrawPathOp(const SkMatrix& viewMatrix, GrColor color, const GrPath* path)
: GrDrawPathOpBase(ClassID(), viewMatrix, color, path->getFillType()), fPath(path) {
this->setTransformedBounds(path->getBounds(), viewMatrix, HasAABloat::kNo, IsZeroArea::kNo);
}
bool onCombineIfPossible(GrOp* t, const GrCaps& caps) override { return false; }
void onExecute(GrOpFlushState* state) override;
GrPendingIOResource<const GrPath, kRead_GrIOType> fPath;
typedef GrDrawPathOpBase INHERITED;
};
// Template this if we decide to support index types other than 16bit
class GrDrawPathRangeOp final : public GrDrawPathOpBase {
public:
typedef GrPathRendering::PathTransformType TransformType;
DEFINE_OP_CLASS_ID
struct InstanceData : private ::SkNoncopyable {
public:
static InstanceData* Alloc(TransformType transformType, int reserveCnt) {
int transformSize = GrPathRendering::PathTransformSize(transformType);
uint8_t* ptr = (uint8_t*)sk_malloc_throw(Align32(sizeof(InstanceData)) +
Align32(reserveCnt * sizeof(uint16_t)) +
reserveCnt * transformSize * sizeof(float));
InstanceData* instanceData = (InstanceData*)ptr;
instanceData->fIndices = (uint16_t*)&ptr[Align32(sizeof(InstanceData))];
instanceData->fTransformValues = (float*)&ptr[Align32(sizeof(InstanceData)) +
Align32(reserveCnt * sizeof(uint16_t))];
instanceData->fTransformType = transformType;
instanceData->fInstanceCount = 0;
instanceData->fRefCnt = 1;
SkDEBUGCODE(instanceData->fReserveCnt = reserveCnt);
return instanceData;
}
// Overload this method if we start using other transform types.
void append(uint16_t index, float x, float y) {
SkASSERT(GrPathRendering::kTranslate_PathTransformType == fTransformType);
SkASSERT(fInstanceCount < fReserveCnt);
fIndices[fInstanceCount] = index;
fTransformValues[2 * fInstanceCount] = x;
fTransformValues[2 * fInstanceCount + 1] = y;
++fInstanceCount;
}
TransformType transformType() const { return fTransformType; }
int count() const { return fInstanceCount; }
const uint16_t* indices() const { return fIndices; }
uint16_t* indices() { return fIndices; }
const float* transformValues() const { return fTransformValues; }
float* transformValues() { return fTransformValues; }
void ref() const { ++fRefCnt; }
void unref() const {
if (0 == --fRefCnt) {
sk_free(const_cast<InstanceData*>(this));
}
}
private:
static int Align32(int sizeInBytes) { return (sizeInBytes + 3) & ~3; }
InstanceData() {}
~InstanceData() {}
uint16_t* fIndices;
float* fTransformValues;
TransformType fTransformType;
int fInstanceCount;
mutable int fRefCnt;
SkDEBUGCODE(int fReserveCnt;)
};
static std::unique_ptr<GrDrawOp> Make(const SkMatrix& viewMatrix, SkScalar scale, SkScalar x,
SkScalar y, GrColor color, GrPathRendering::FillType fill,
GrPathRange* range, const InstanceData* instanceData,
const SkRect& bounds) {
return std::unique_ptr<GrDrawOp>(new GrDrawPathRangeOp(viewMatrix, scale, x, y, color, fill,
range, instanceData, bounds));
}
const char* name() const override { return "DrawPathRange"; }
SkString dumpInfo() const override;
private:
GrDrawPathRangeOp(const SkMatrix& viewMatrix, SkScalar scale, SkScalar x, SkScalar y,
GrColor color, GrPathRendering::FillType fill, GrPathRange* range,
const InstanceData* instanceData, const SkRect& bounds);
TransformType transformType() const { return fDraws.head()->fInstanceData->transformType(); }
bool onCombineIfPossible(GrOp* t, const GrCaps& caps) override;
void onExecute(GrOpFlushState* state) override;
struct Draw {
void set(const InstanceData* instanceData, SkScalar x, SkScalar y) {
fInstanceData.reset(SkRef(instanceData));
fX = x;
fY = y;
}
sk_sp<const InstanceData> fInstanceData;
SkScalar fX, fY;
};
typedef GrPendingIOResource<const GrPathRange, kRead_GrIOType> PendingPathRange;
typedef SkTLList<Draw, 4> DrawList;
PendingPathRange fPathRange;
DrawList fDraws;
int fTotalPathCount;
SkScalar fScale;
typedef GrDrawPathOpBase INHERITED;
};
#endif
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