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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 GrAtlasTextOp_DEFINED
#define GrAtlasTextOp_DEFINED
#include "ops/GrMeshDrawOp.h"
#include "text/GrTextContext.h"
#include "text/GrDistanceFieldAdjustTable.h"
#include "text/GrGlyphCache.h"
class SkAtlasTextTarget;
class GrContext;
class GrAtlasTextOp final : public GrMeshDrawOp {
public:
DEFINE_OP_CLASS_ID
~GrAtlasTextOp() override {
for (int i = 0; i < fGeoCount; i++) {
fGeoData[i].fBlob->unref();
}
}
static const int kVerticesPerGlyph = GrTextBlob::kVerticesPerGlyph;
static const int kIndicesPerGlyph = 6;
typedef GrTextBlob Blob;
struct Geometry {
SkMatrix fViewMatrix;
SkIRect fClipRect;
Blob* fBlob;
SkScalar fX;
SkScalar fY;
uint16_t fRun;
uint16_t fSubRun;
GrColor fColor;
};
static std::unique_ptr<GrAtlasTextOp> MakeBitmap(GrContext* context,
GrPaint&& paint,
GrMaskFormat maskFormat,
int glyphCount,
bool needsTransform);
static std::unique_ptr<GrAtlasTextOp> MakeDistanceField(
GrContext* context,
GrPaint&& paint,
int glyphCount,
const GrDistanceFieldAdjustTable* distanceAdjustTable,
bool useGammaCorrectDistanceTable,
SkColor luminanceColor,
const SkSurfaceProps& props,
bool isAntiAliased,
bool useLCD);
// To avoid even the initial copy of the struct, we have a getter for the first item which
// is used to seed the op with its initial geometry. After seeding, the client should call
// init() so the op can initialize itself
Geometry& geometry() { return fGeoData[0]; }
/** Called after this->geometry() has been configured. */
void init();
const char* name() const override { return "AtlasTextOp"; }
void visitProxies(const VisitProxyFunc& func) const override;
SkString dumpInfo() const override;
FixedFunctionFlags fixedFunctionFlags() const override;
RequiresDstTexture finalize(const GrCaps& caps, const GrAppliedClip* clip) override;
enum MaskType {
kGrayscaleCoverageMask_MaskType,
kLCDCoverageMask_MaskType,
kColorBitmapMask_MaskType,
kAliasedDistanceField_MaskType,
kGrayscaleDistanceField_MaskType,
kLCDDistanceField_MaskType,
kLCDBGRDistanceField_MaskType,
};
MaskType maskType() const { return fMaskType; }
void finalizeForTextTarget(uint32_t color, const GrCaps&);
void executeForTextTarget(SkAtlasTextTarget*);
private:
friend class GrOpMemoryPool; // for ctor
// The minimum number of Geometry we will try to allocate.
static constexpr auto kMinGeometryAllocated = 12;
GrAtlasTextOp(GrPaint&& paint)
: INHERITED(ClassID())
, fGeoDataAllocSize(kMinGeometryAllocated)
, fProcessors(std::move(paint)) {}
struct FlushInfo {
sk_sp<const GrBuffer> fVertexBuffer;
sk_sp<const GrBuffer> fIndexBuffer;
sk_sp<GrGeometryProcessor> fGeometryProcessor;
const GrPipeline* fPipeline;
const GrPipeline::FixedDynamicState* fFixedDynamicState;
int fGlyphsToFlush;
int fVertexOffset;
};
void onPrepareDraws(Target*) override;
GrMaskFormat maskFormat() const {
switch (fMaskType) {
case kLCDCoverageMask_MaskType:
return kA565_GrMaskFormat;
case kColorBitmapMask_MaskType:
return kARGB_GrMaskFormat;
case kGrayscaleCoverageMask_MaskType:
case kAliasedDistanceField_MaskType:
case kGrayscaleDistanceField_MaskType:
case kLCDDistanceField_MaskType:
case kLCDBGRDistanceField_MaskType:
return kA8_GrMaskFormat;
}
return kA8_GrMaskFormat; // suppress warning
}
bool usesDistanceFields() const {
return kAliasedDistanceField_MaskType == fMaskType ||
kGrayscaleDistanceField_MaskType == fMaskType ||
kLCDDistanceField_MaskType == fMaskType ||
kLCDBGRDistanceField_MaskType == fMaskType;
}
bool isLCD() const {
return kLCDCoverageMask_MaskType == fMaskType ||
kLCDDistanceField_MaskType == fMaskType ||
kLCDBGRDistanceField_MaskType == fMaskType;
}
inline void flush(GrMeshDrawOp::Target* target, FlushInfo* flushInfo) const;
GrColor color() const { SkASSERT(fGeoCount > 0); return fGeoData[0].fColor; }
bool usesLocalCoords() const { return fUsesLocalCoords; }
int numGlyphs() const { return fNumGlyphs; }
bool onCombineIfPossible(GrOp* t, const GrCaps& caps) override;
sk_sp<GrGeometryProcessor> setupDfProcessor(const sk_sp<GrTextureProxy>* proxies,
unsigned int numActiveProxies) const;
SkAutoSTMalloc<kMinGeometryAllocated, Geometry> fGeoData;
int fGeoDataAllocSize;
GrProcessorSet fProcessors;
struct {
uint32_t fUsesLocalCoords : 1;
uint32_t fCanCombineOnTouchOrOverlap : 1;
uint32_t fUseGammaCorrectDistanceTable : 1;
uint32_t fNeedsGlyphTransform : 1;
};
int fGeoCount;
int fNumGlyphs;
MaskType fMaskType;
// Distance field properties
sk_sp<const GrDistanceFieldAdjustTable> fDistanceAdjustTable;
SkColor fLuminanceColor;
uint32_t fDFGPFlags = 0;
typedef GrMeshDrawOp INHERITED;
};
#endif
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