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 #ifndef SkImagePriv_DEFINED 9 #define SkImagePriv_DEFINED 10 11 #include "SkImage.h" 12 13 // Call this if you explicitly want to use/share this pixelRef in the image 14 extern SkImage* SkNewImageFromPixelRef(const SkImageInfo&, SkPixelRef*, 15 size_t rowBytes); 16 17 /** 18 * Examines the bitmap to decide if it can share the existing pixelRef, or 19 * if it needs to make a deep-copy of the pixels. The bitmap's pixelref will 20 * be shared if either the bitmap is marked as immutable, or canSharePixelRef 21 * is true. 22 * 23 * If the bitmap's colortype cannot be converted into a corresponding 24 * SkImageInfo, or the bitmap's pixels cannot be accessed, this will return 25 * NULL. 26 */ 27 extern SkImage* SkNewImageFromBitmap(const SkBitmap&, bool canSharePixelRef); 28 29 static inline size_t SkImageMinRowBytes(const SkImageInfo& info) { 30 return SkAlign4(info.minRowBytes()); 31 } 32 33 // Given an image created from SkNewImageFromBitmap, return its pixelref. This 34 // may be called to see if the surface and the image share the same pixelref, 35 // in which case the surface may need to perform a copy-on-write. 36 extern SkPixelRef* SkBitmapImageGetPixelRef(SkImage* rasterImage); 37 38 // Given an image created with NewTexture, return its GrTexture. This 39 // may be called to see if the surface and the image share the same GrTexture, 40 // in which case the surface may need to perform a copy-on-write. 41 extern GrTexture* SkTextureImageGetTexture(SkImage* textureImage); 42 43 // Update the texture wrapped by an image created with NewTexture. This 44 // is called when a surface and image share the same GrTexture and the 45 // surface needs to perform a copy-on-write 46 extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture); 47 48 #endif 49
