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 14extern 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 */ 27extern SkImage* SkNewImageFromBitmap(const SkBitmap&, bool canSharePixelRef); 28 29static 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. 36extern 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. 41extern 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 46extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture); 47 48#endif 49