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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 
     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 onDrawRectToRect(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::onDrawRectToRect(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 }
     94