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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 GrAtlasTextContext_DEFINED
#define GrAtlasTextContext_DEFINED
#include "GrAtlasTextBlob.h"
#include "GrDistanceFieldAdjustTable.h"
#include "GrGeometryProcessor.h"
#include "SkTextBlobRunIterator.h"
#ifdef GR_TEST_UTILS
#include "GrBatchTest.h"
#endif
class GrDrawBatch;
class GrDrawContext;
class GrPipelineBuilder;
class GrTextBlobCache;
class SkGlyph;
/*
* Renders text using some kind of an atlas, ie BitmapText or DistanceField text
*/
class GrAtlasTextContext {
public:
static GrAtlasTextContext* Create();
bool canDraw(const SkPaint&, const SkMatrix& viewMatrix, const SkSurfaceProps&,
const GrShaderCaps&);
void drawText(GrContext*, GrDrawContext*, const GrClip&, const GrPaint&, const SkPaint&,
const SkMatrix& viewMatrix, const SkSurfaceProps&, const char text[],
size_t byteLength, SkScalar x, SkScalar y,
const SkIRect& regionClipBounds);
void drawPosText(GrContext*, GrDrawContext*, const GrClip&, const GrPaint&,
const SkPaint&, const SkMatrix& viewMatrix, const SkSurfaceProps&,
const char text[], size_t byteLength,
const SkScalar pos[], int scalarsPerPosition,
const SkPoint& offset, const SkIRect& regionClipBounds);
void drawTextBlob(GrContext*, GrDrawContext*, const GrClip&, const SkPaint&,
const SkMatrix& viewMatrix, const SkSurfaceProps&, const SkTextBlob*,
SkScalar x, SkScalar y,
SkDrawFilter*, const SkIRect& clipBounds);
private:
GrAtlasTextContext();
// sets up the descriptor on the blob and returns a detached cache. Client must attach
inline static GrColor ComputeCanonicalColor(const SkPaint&, bool lcd);
// Determines if we need to use fake gamma (and contrast boost):
inline static uint32_t ComputeScalerContextFlags(GrDrawContext*);
static void RegenerateTextBlob(GrAtlasTextBlob* bmp,
GrBatchFontCache*,
const GrShaderCaps&,
const SkPaint& skPaint, GrColor,
uint32_t scalerContextFlags,
const SkMatrix& viewMatrix,
const SkSurfaceProps&,
const SkTextBlob* blob, SkScalar x, SkScalar y,
SkDrawFilter* drawFilter);
inline static bool HasLCD(const SkTextBlob*);
static inline GrAtlasTextBlob* CreateDrawTextBlob(GrTextBlobCache*,
GrBatchFontCache*, const GrShaderCaps&,
const GrPaint&,
const SkPaint&,
uint32_t scalerContextFlags,
const SkMatrix& viewMatrix,
const SkSurfaceProps&,
const char text[], size_t byteLength,
SkScalar x, SkScalar y);
static inline GrAtlasTextBlob* CreateDrawPosTextBlob(GrTextBlobCache*, GrBatchFontCache*,
const GrShaderCaps&,
const GrPaint&,
const SkPaint&,
uint32_t scalerContextFlags,
const SkMatrix& viewMatrix,
const SkSurfaceProps&,
const char text[], size_t byteLength,
const SkScalar pos[],
int scalarsPerPosition,
const SkPoint& offset);
const GrDistanceFieldAdjustTable* dfAdjustTable() const { return fDistanceAdjustTable; }
SkAutoTUnref<const GrDistanceFieldAdjustTable> fDistanceAdjustTable;
#ifdef GR_TEST_UTILS
static const uint32_t kTextBlobBatchScalerContextFlags =
SkPaint::kFakeGammaAndBoostContrast_ScalerContextFlags;
DRAW_BATCH_TEST_FRIEND(TextBlobBatch);
#endif
};
#endif
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