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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         // TODO
     28         return false;
     29     }
     30 
     31     GrTexture* getTexture() { return fBitmap.getTexture(); }
     32 
     33 private:
     34     SkBitmap    fBitmap;
     35 
     36     typedef SkImage_Base INHERITED;
     37 };
     38 
     39 ///////////////////////////////////////////////////////////////////////////////
     40 
     41 SkImage_Gpu::SkImage_Gpu(const SkBitmap& bitmap)
     42     : INHERITED(bitmap.width(), bitmap.height())
     43     , fBitmap(bitmap) {
     44     SkASSERT(NULL != fBitmap.getTexture());
     45 }
     46 
     47 SkImage_Gpu::~SkImage_Gpu() {
     48 }
     49 
     50 void SkImage_Gpu::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
     51                          const SkPaint* paint) {
     52     canvas->drawBitmap(fBitmap, x, y, paint);
     53 }
     54 
     55 void SkImage_Gpu::onDrawRectToRect(SkCanvas* canvas, const SkRect* src, const SkRect& dst,
     56                          const SkPaint* paint) {
     57     canvas->drawBitmapRectToRect(fBitmap, src, dst, paint);
     58 }
     59 
     60 GrTexture* SkImage_Gpu::onGetTexture() {
     61     return fBitmap.getTexture();
     62 }
     63 
     64 ///////////////////////////////////////////////////////////////////////////////
     65 
     66 SkImage* SkImage::NewTexture(const SkBitmap& bitmap) {
     67     if (NULL == bitmap.getTexture()) {
     68         return NULL;
     69     }
     70 
     71     return SkNEW_ARGS(SkImage_Gpu, (bitmap));
     72 }
     73 
     74 GrTexture* SkTextureImageGetTexture(SkImage* image) {
     75     return ((SkImage_Gpu*)image)->getTexture();
     76 }
     77