michael@0: /*
michael@0:  * Copyright 2010 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef GrTextContext_DEFINED
michael@0: #define GrTextContext_DEFINED
michael@0: 
michael@0: #include "GrPoint.h"
michael@0: #include "GrGlyph.h"
michael@0: #include "GrPaint.h"
michael@0: #include "SkDeviceProperties.h"
michael@0: 
michael@0: #include "SkPostConfig.h"
michael@0: 
michael@0: class GrContext;
michael@0: class GrDrawTarget;
michael@0: class GrFontScaler;
michael@0: 
michael@0: /*
michael@0:  * This class wraps the state for a single text render
michael@0:  */
michael@0: class GrTextContext {
michael@0: public:
michael@0:     virtual ~GrTextContext() {}
michael@0:     virtual void drawText(const GrPaint&, const SkPaint&, const char text[], size_t byteLength,
michael@0:                           SkScalar x, SkScalar y) = 0;
michael@0:     virtual void drawPosText(const GrPaint&, const SkPaint&,
michael@0:                              const char text[], size_t byteLength,
michael@0:                              const SkScalar pos[], SkScalar constY,
michael@0:                              int scalarsPerPosition) = 0;
michael@0: 
michael@0:     virtual bool canDraw(const SkPaint& paint) = 0;
michael@0: 
michael@0: protected:
michael@0:     GrTextContext(GrContext*, const SkDeviceProperties&);
michael@0: 
michael@0:     static GrFontScaler* GetGrFontScaler(SkGlyphCache* cache);
michael@0:     static void MeasureText(SkGlyphCache* cache, SkDrawCacheProc glyphCacheProc,
michael@0:                             const char text[], size_t byteLength, SkVector* stopVector);
michael@0: 
michael@0:     void init(const GrPaint&, const SkPaint&);
michael@0:     void finish() { fDrawTarget = NULL; }
michael@0: 
michael@0:     GrContext*         fContext;
michael@0:     SkDeviceProperties fDeviceProperties;
michael@0: 
michael@0:     GrDrawTarget*      fDrawTarget;
michael@0:     SkIRect            fClipRect;
michael@0:     GrPaint            fPaint;
michael@0:     SkPaint            fSkPaint;
michael@0: };
michael@0: 
michael@0: #endif