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 "SkBitmap.h" 12#include "SkImage.h" 13 14// Call this if you explicitly want to use/share this pixelRef in the image 15extern SkImage* SkNewImageFromPixelRef(const SkImageInfo&, SkPixelRef*, 16 size_t rowBytes); 17 18/** 19 * Examines the bitmap to decide if it can share the existing pixelRef, or 20 * if it needs to make a deep-copy of the pixels. The bitmap's pixelref will 21 * be shared if either the bitmap is marked as immutable, or canSharePixelRef 22 * is true. 23 * 24 * If the bitmap's colortype cannot be converted into a corresponding 25 * SkImageInfo, or the bitmap's pixels cannot be accessed, this will return 26 * NULL. 27 */ 28extern SkImage* SkNewImageFromBitmap(const SkBitmap&, bool canSharePixelRef); 29 30static inline size_t SkImageMinRowBytes(const SkImageInfo& info) { 31 return SkAlign4(info.minRowBytes()); 32} 33 34// Given an image created from SkNewImageFromBitmap, return its pixelref. This 35// may be called to see if the surface and the image share the same pixelref, 36// in which case the surface may need to perform a copy-on-write. 37extern SkPixelRef* SkBitmapImageGetPixelRef(SkImage* rasterImage); 38 39// Given an image created with NewTexture, return its GrTexture. This 40// may be called to see if the surface and the image share the same GrTexture, 41// in which case the surface may need to perform a copy-on-write. 42extern GrTexture* SkTextureImageGetTexture(SkImage* textureImage); 43 44// Update the texture wrapped by an image created with NewTexture. This 45// is called when a surface and image share the same GrTexture and the 46// surface needs to perform a copy-on-write 47extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture); 48 49#endif 50