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      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 #include "SkGrPixelRef.h"
     15 
     16 class SkImage_Gpu : public SkImage_Base {
     17 public:
     18     SK_DECLARE_INST_COUNT(SkImage_Gpu)
     19 
     20     explicit SkImage_Gpu(const SkBitmap&);
     21     virtual ~SkImage_Gpu();
     22 
     23     virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*) SK_OVERRIDE;
     24     virtual void onDrawRectToRect(SkCanvas*, const SkRect* src, const SkRect& dst, const SkPaint*) SK_OVERRIDE;
     25     virtual GrTexture* onGetTexture() SK_OVERRIDE;
     26     virtual bool getROPixels(SkBitmap*) const SK_OVERRIDE;
     27 
     28     GrTexture* getTexture() { return fBitmap.getTexture(); }
     29 
     30 private:
     31     SkBitmap    fBitmap;
     32 
     33     typedef SkImage_Base INHERITED;
     34 };
     35 
     36 ///////////////////////////////////////////////////////////////////////////////
     37 
     38 SkImage_Gpu::SkImage_Gpu(const SkBitmap& bitmap)
     39     : INHERITED(bitmap.width(), bitmap.height())
     40     , fBitmap(bitmap) {
     41     SkASSERT(NULL != fBitmap.getTexture());
     42 }
     43 
     44 SkImage_Gpu::~SkImage_Gpu() {
     45 }
     46 
     47 void SkImage_Gpu::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
     48                          const SkPaint* paint) {
     49     canvas->drawBitmap(fBitmap, x, y, paint);
     50 }
     51 
     52 void SkImage_Gpu::onDrawRectToRect(SkCanvas* canvas, const SkRect* src, const SkRect& dst,
     53                          const SkPaint* paint) {
     54     canvas->drawBitmapRectToRect(fBitmap, src, dst, paint);
     55 }
     56 
     57 GrTexture* SkImage_Gpu::onGetTexture() {
     58     return fBitmap.getTexture();
     59 }
     60 
     61 bool SkImage_Gpu::getROPixels(SkBitmap* dst) const {
     62     return fBitmap.copyTo(dst, kN32_SkColorType);
     63 }
     64 
     65 ///////////////////////////////////////////////////////////////////////////////
     66 
     67 SkImage* SkImage::NewTexture(const SkBitmap& bitmap) {
     68     if (NULL == bitmap.getTexture()) {
     69         return NULL;
     70     }
     71 
     72     return SkNEW_ARGS(SkImage_Gpu, (bitmap));
     73 }
     74 
     75 GrTexture* SkTextureImageGetTexture(SkImage* image) {
     76     return ((SkImage_Gpu*)image)->getTexture();
     77 }
     78