src/third_party/skia/src/image/SkImage_Gpu.cpp

   1 /*
   2  * Copyright 2012 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 #include "SkImage_Base.h"
   9 #include "SkImagePriv.h"
  10 #include "SkBitmap.h"
  11 #include "SkCanvas.h"
  12 #include "GrContext.h"
  13 #include "GrTexture.h"
  14
  15 class SkImage_Gpu : public SkImage_Base {
  16 public:
  17     SK_DECLARE_INST_COUNT(SkImage_Gpu)
  18
  19     explicit SkImage_Gpu(const SkBitmap&);
  20     virtual ~SkImage_Gpu();
  21
  22     virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*) const SK_OVERRIDE;
  23     virtual void onDrawRect(SkCanvas*, const SkRect* src, const SkRect& dst,
  24                                   const SkPaint*) const SK_OVERRIDE;
  25     virtual GrTexture* onGetTexture() const SK_OVERRIDE;
  26     virtual bool getROPixels(SkBitmap*) const SK_OVERRIDE;
  27
  28     GrTexture* getTexture() const { return fBitmap.getTexture(); }
  29
  30     virtual SkShader* onNewShader(SkShader::TileMode,
  31                                   SkShader::TileMode,
  32                                   const SkMatrix* localMatrix) const SK_OVERRIDE;
  33
  34     virtual bool isOpaque() const SK_OVERRIDE;
  35
  36 private:
  37     SkBitmap    fBitmap;
  38
  39     typedef SkImage_Base INHERITED;
  40 };
  41
  42 ///////////////////////////////////////////////////////////////////////////////
  43
  44 SkImage_Gpu::SkImage_Gpu(const SkBitmap& bitmap)
  45     : INHERITED(bitmap.width(), bitmap.height())
  46     , fBitmap(bitmap) {
  47     SkASSERT(fBitmap.getTexture());
  48 }
  49
  50 SkImage_Gpu::~SkImage_Gpu() {
  51 }
  52
  53 SkShader* SkImage_Gpu::onNewShader(SkShader::TileMode tileX,
  54                                    SkShader::TileMode tileY,
  55                                    const SkMatrix* localMatrix) const
  56 {
  57     return SkShader::CreateBitmapShader(fBitmap, tileX, tileY, localMatrix);
  58 }
  59
  60 void SkImage_Gpu::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const {
  61     canvas->drawBitmap(fBitmap, x, y, paint);
  62 }
  63
  64 void SkImage_Gpu::onDrawRect(SkCanvas* canvas, const SkRect* src, const SkRect& dst,
  65                                    const SkPaint* paint) const {
  66     canvas->drawBitmapRectToRect(fBitmap, src, dst, paint);
  67 }
  68
  69 GrTexture* SkImage_Gpu::onGetTexture() const {
  70     return fBitmap.getTexture();
  71 }
  72
  73 bool SkImage_Gpu::getROPixels(SkBitmap* dst) const {
  74     return fBitmap.copyTo(dst, kN32_SkColorType);
  75 }
  76
  77 bool SkImage_Gpu::isOpaque() const {
  78     return fBitmap.isOpaque();
  79 }
  80
  81 ///////////////////////////////////////////////////////////////////////////////
  82
  83 SkImage* SkImage::NewTexture(const SkBitmap& bitmap) {
  84     if (NULL == bitmap.getTexture()) {
  85         return NULL;
  86     }
  87
  88     return SkNEW_ARGS(SkImage_Gpu, (bitmap));
  89 }
  90
  91 GrTexture* SkTextureImageGetTexture(SkImage* image) {
  92     return ((SkImage_Gpu*)image)->getTexture();
  93 }