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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/GrAtlasTextContext.h"
#include "text/GrDistanceFieldAdjustTable.h"
#include "text/GrGlyphCache.h"
class SkAtlasTextTarget;
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 = GrAtlasTextBlob::kVerticesPerGlyph;
static const int kIndicesPerGlyph = 6;
typedef GrAtlasTextBlob 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(
GrPaint&& paint, GrMaskFormat maskFormat, int glyphCount,
bool hasScaledGlyphs) {
std::unique_ptr<GrAtlasTextOp> op(new GrAtlasTextOp(std::move(paint)));
switch (maskFormat) {
case kA8_GrMaskFormat:
op->fMaskType = kGrayscaleCoverageMask_MaskType;
break;
case kA565_GrMaskFormat:
op->fMaskType = kLCDCoverageMask_MaskType;
break;
case kARGB_GrMaskFormat:
op->fMaskType = kColorBitmapMask_MaskType;
break;
}
op->fNumGlyphs = glyphCount;
op->fGeoCount = 1;
op->fLuminanceColor = 0;
op->fHasScaledGlyphs = hasScaledGlyphs;
return op;
}
static std::unique_ptr<GrAtlasTextOp> MakeDistanceField(
GrPaint&& paint, int glyphCount, const GrDistanceFieldAdjustTable* distanceAdjustTable,
bool useGammaCorrectDistanceTable, SkColor luminanceColor, bool isLCD, bool useBGR,
bool isAntiAliased) {
std::unique_ptr<GrAtlasTextOp> op(new GrAtlasTextOp(std::move(paint)));
op->fMaskType = !isAntiAliased ? kAliasedDistanceField_MaskType
: isLCD ? (useBGR ? kLCDBGRDistanceField_MaskType
: kLCDDistanceField_MaskType)
: kGrayscaleDistanceField_MaskType;
op->fDistanceAdjustTable.reset(SkRef(distanceAdjustTable));
op->fUseGammaCorrectDistanceTable = useGammaCorrectDistanceTable;
op->fLuminanceColor = luminanceColor;
op->fNumGlyphs = glyphCount;
op->fGeoCount = 1;
return op;
}
// 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,
GrPixelConfigIsClamped dstIsClamped) 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:
// The minimum number of Geometry we will try to allocate.
static constexpr auto kMinGeometryAllocated = 12;
GrAtlasTextOp(GrPaint&& paint)
: INHERITED(ClassID())
, fGeoDataAllocSize(kMinGeometryAllocated)
, fSRGBFlags(GrPipeline::SRGBFlagsFromPaint(paint))
, fProcessors(std::move(paint)) {}
struct FlushInfo {
sk_sp<const GrBuffer> fVertexBuffer;
sk_sp<const GrBuffer> fIndexBuffer;
sk_sp<GrGeometryProcessor> fGeometryProcessor;
const GrPipeline* fPipeline;
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(GrAtlasManager*) const;
SkAutoSTMalloc<kMinGeometryAllocated, Geometry> fGeoData;
int fGeoDataAllocSize;
uint32_t fSRGBFlags;
GrProcessorSet fProcessors;
struct {
uint32_t fUsesLocalCoords : 1;
uint32_t fCanCombineOnTouchOrOverlap : 1;
uint32_t fUseGammaCorrectDistanceTable : 1;
uint32_t fHasScaledGlyphs : 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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