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      1 /*
      2  * Copyright 2010 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #ifndef GrTextContext_DEFINED
      9 #define GrTextContext_DEFINED
     10 
     11 #include "GrContext.h"
     12 #include "GrGlyph.h"
     13 #include "GrPaint.h"
     14 
     15 class GrContext;
     16 class GrTextStrike;
     17 class GrFontScaler;
     18 class GrDrawTarget;
     19 
     20 class GrTextContext {
     21 public:
     22     GrTextContext(GrContext*, const GrPaint&);
     23     ~GrTextContext();
     24 
     25     void drawPackedGlyph(GrGlyph::PackedID, GrFixed left, GrFixed top,
     26                          GrFontScaler*);
     27 
     28     void flush();   // optional; automatically called by destructor
     29 
     30 private:
     31     GrPaint         fPaint;
     32     GrContext*      fContext;
     33     GrDrawTarget*   fDrawTarget;
     34 
     35     GrFontScaler*   fScaler;
     36     GrTextStrike*   fStrike;
     37 
     38     inline void flushGlyphs();
     39     void setupDrawTarget();
     40 
     41     enum {
     42         kMinRequestedGlyphs      = 1,
     43         kDefaultRequestedGlyphs  = 64,
     44         kMinRequestedVerts       = kMinRequestedGlyphs * 4,
     45         kDefaultRequestedVerts   = kDefaultRequestedGlyphs * 4,
     46     };
     47 
     48     SkPoint*                fVertices;
     49     int32_t                 fMaxVertices;
     50     GrTexture*              fCurrTexture;
     51     int                     fCurrVertex;
     52 
     53     SkIRect                 fClipRect;
     54     GrContext::AutoMatrix   fAutoMatrix;
     55 };
     56 
     57 #endif
     58