src/third_party/skia/src/gpu/GrBitmapTextContext.h

   1 /*
   2  * Copyright 2013 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 GrBitmapTextContext_DEFINED
   9 #define GrBitmapTextContext_DEFINED
  10
  11 #include "GrTextContext.h"
  12
  13 class GrGeometryProcessor;
  14 class GrTextStrike;
  15
  16 /*
  17  * This class implements GrTextContext using standard bitmap fonts
  18  */
  19 class GrBitmapTextContext : public GrTextContext {
  20 public:
  21     static GrBitmapTextContext* Create(GrContext*, const SkDeviceProperties&);
  22
  23     virtual ~GrBitmapTextContext();
  24
  25 private:
  26     GrTextStrike*                     fStrike;
  27     void*                             fVertices;
  28     int                               fCurrVertex;
  29     int                               fAllocVertexCount;
  30     int                               fTotalVertexCount;
  31     SkRect                            fVertexBounds;
  32     GrTexture*                        fCurrTexture;
  33     GrMaskFormat                      fCurrMaskFormat;
  34     SkAutoTUnref<GrGeometryProcessor> fCachedGeometryProcessor;
  35     // Used to check whether fCachedEffect is still valid.
  36     uint32_t                          fEffectTextureUniqueID;
  37
  38     GrBitmapTextContext(GrContext*, const SkDeviceProperties&);
  39
  40     virtual bool canDraw(const SkPaint& paint) SK_OVERRIDE;
  41
  42     virtual void onDrawText(const GrPaint&, const SkPaint&, const char text[], size_t byteLength,
  43                             SkScalar x, SkScalar y) SK_OVERRIDE;
  44     virtual void onDrawPosText(const GrPaint&, const SkPaint&,
  45                                const char text[], size_t byteLength,
  46                                const SkScalar pos[], int scalarsPerPosition,
  47                                const SkPoint& offset) SK_OVERRIDE;
  48
  49     void init(const GrPaint&, const SkPaint&);
  50     void appendGlyph(GrGlyph::PackedID, SkFixed left, SkFixed top, GrFontScaler*);
  51     void flush();                 // automatically called by destructor
  52     void finish();
  53
  54 };
  55
  56 #endif