| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrTextContext_DEFINED |
| #define GrTextContext_DEFINED |
| |
| #include "GrClip.h" |
| #include "GrGlyph.h" |
| #include "GrPaint.h" |
| #include "SkSurfaceProps.h" |
| #include "SkPostConfig.h" |
| |
| class GrClip; |
| class GrContext; |
| class GrDrawContext; |
| class GrFontScaler; |
| class SkDrawFilter; |
| class SkTextBlob; |
| |
| /* |
| * This class wraps the state for a single text render |
| */ |
| class GrTextContext { |
| public: |
| virtual ~GrTextContext(); |
| |
| void drawText(GrDrawContext* dc, |
| const GrClip&, const GrPaint&, const SkPaint&, |
| const SkMatrix& viewMatrix, const char text[], size_t byteLength, SkScalar x, |
| SkScalar y, const SkIRect& clipBounds); |
| void drawPosText(GrDrawContext* dc, |
| const GrClip&, const GrPaint&, const SkPaint&, |
| const SkMatrix& viewMatrix, |
| const char text[], size_t byteLength, |
| const SkScalar pos[], int scalarsPerPosition, |
| const SkPoint& offset, const SkIRect& clipBounds); |
| virtual void drawTextBlob(GrDrawContext* dc, const GrClip&, const SkPaint&, |
| const SkMatrix& viewMatrix, const SkTextBlob*, |
| SkScalar x, SkScalar y, |
| SkDrawFilter*, const SkIRect& clipBounds); |
| |
| static bool ShouldDisableLCD(const SkPaint& paint); |
| |
| protected: |
| GrTextContext* fFallbackTextContext; |
| GrContext* fContext; |
| SkSurfaceProps fSurfaceProps; |
| |
| GrTextContext(GrContext*, const SkSurfaceProps&); |
| |
| virtual bool canDraw(const SkPaint&, const SkMatrix& viewMatrix) = 0; |
| |
| virtual void onDrawText(GrDrawContext*, const GrClip&, |
| const GrPaint&, const SkPaint&, |
| const SkMatrix& viewMatrix, const char text[], size_t byteLength, |
| SkScalar x, SkScalar y, const SkIRect& clipBounds) = 0; |
| virtual void onDrawPosText(GrDrawContext*, const GrClip&, |
| const GrPaint&, const SkPaint&, |
| const SkMatrix& viewMatrix, |
| const char text[], size_t byteLength, |
| const SkScalar pos[], int scalarsPerPosition, |
| const SkPoint& offset, const SkIRect& clipBounds) = 0; |
| |
| void drawTextAsPath(GrDrawContext*, const GrClip& clip, |
| const SkPaint& origPaint, const SkMatrix& viewMatrix, |
| const char text[], size_t byteLength, SkScalar x, SkScalar y, |
| const SkIRect& clipBounds); |
| void drawPosTextAsPath(GrDrawContext*, const GrClip& clip, |
| const SkPaint& origPaint, const SkMatrix& viewMatrix, |
| const char text[], size_t byteLength, |
| const SkScalar pos[], int scalarsPerPosition, |
| const SkPoint& offset, const SkIRect& clipBounds); |
| |
| static GrFontScaler* GetGrFontScaler(SkGlyphCache* cache); |
| // sets extent in stopVector and returns glyph count |
| static int MeasureText(SkGlyphCache* cache, SkDrawCacheProc glyphCacheProc, |
| const char text[], size_t byteLength, SkVector* stopVector); |
| static uint32_t FilterTextFlags(const SkSurfaceProps& surfaceProps, const SkPaint& paint); |
| |
| friend class GrAtlasTextBatch; |
| friend class GrAtlasTextBlob; // for drawTextAsPath |
| }; |
| |
| #endif |