Line data    Source code

       1             : /*
       2             :  * Copyright 2015 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 SkBitmapProvider_DEFINED
       9             : #define SkBitmapProvider_DEFINED
      10             : 
      11             : #include "SkImage.h"
      12             : #include "SkBitmapCache.h"
      13             : 
      14             : class SkBitmapProvider {
      15             : public:
      16         141 :     explicit SkBitmapProvider(const SkImage* img, SkColorSpace* dstColorSpace)
      17         141 :         : fImage(img)
      18         141 :         , fDstColorSpace(dstColorSpace) {
      19         141 :         SkASSERT(img);
      20         141 :     }
      21         141 :     SkBitmapProvider(const SkBitmapProvider& other)
      22         141 :         : fImage(other.fImage)
      23         141 :         , fDstColorSpace(other.fDstColorSpace)
      24         141 :     {}
      25             : 
      26             :     int width() const;
      27             :     int height() const;
      28             :     uint32_t getID() const;
      29           0 :     SkColorSpace* dstColorSpace() const { return fDstColorSpace; }
      30             : 
      31             :     SkImageInfo info() const;
      32             :     bool isVolatile() const;
      33             : 
      34             :     SkBitmapCacheDesc makeCacheDesc(int w, int h) const;
      35             :     SkBitmapCacheDesc makeCacheDesc() const;
      36             :     void notifyAddedToCache() const;
      37             : 
      38             :     // Only call this if you're sure you need the bits, since it maybe expensive
      39             :     // ... cause a decode and cache, or gpu-readback
      40             :     bool asBitmap(SkBitmap*) const;
      41             : 
      42             : private:
      43             :     // Stack-allocated only.
      44             :     void* operator new(size_t) = delete;
      45             :     void* operator new(size_t, void*) = delete;
      46             : 
      47             :     // SkBitmapProvider is always short-lived/stack allocated, and the source image and destination
      48             :     // color space are guaranteed to outlive its scope => we can store raw ptrs to avoid ref churn.
      49             :     const SkImage* fImage;
      50             :     SkColorSpace*  fDstColorSpace;
      51             : };
      52             : 
      53             : #endif