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 #include "SkSurface.h" 13 14 // Call this if you explicitly want to use/share this pixelRef in the image 15 extern SkImage* SkNewImageFromPixelRef(const SkImageInfo&, SkPixelRef*, 16 const SkIPoint& pixelRefOrigin, 17 size_t rowBytes, 18 const SkSurfaceProps*); 19 20 /** 21 * Examines the bitmap to decide if it can share the existing pixelRef, or 22 * if it needs to make a deep-copy of the pixels. The bitmap's pixelref will 23 * be shared if either the bitmap is marked as immutable, or canSharePixelRef 24 * is true. 25 * 26 * If the bitmap's colortype cannot be converted into a corresponding 27 * SkImageInfo, or the bitmap's pixels cannot be accessed, this will return 28 * NULL. 29 */ 30 extern SkImage* SkNewImageFromBitmap(const SkBitmap&, bool canSharePixelRef, const SkSurfaceProps*); 31 32 static inline size_t SkImageMinRowBytes(const SkImageInfo& info) { 33 return SkAlign4(info.minRowBytes()); 34 } 35 36 // Given an image created from SkNewImageFromBitmap, return its pixelref. This 37 // may be called to see if the surface and the image share the same pixelref, 38 // in which case the surface may need to perform a copy-on-write. 39 extern const SkPixelRef* SkBitmapImageGetPixelRef(const SkImage* rasterImage); 40 41 // When a texture is shared by a surface and an image its budgeted status is that of the 42 // surface. This function is used when the surface makes a new texture for itself in order 43 // for the orphaned image to determine whether the original texture counts against the 44 // budget or not. 45 extern void SkTextureImageApplyBudgetedDecision(SkImage* textureImage); 46 47 // Update the texture wrapped by an image created with NewTexture. This 48 // is called when a surface and image share the same GrTexture and the 49 // surface needs to perform a copy-on-write 50 extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture); 51 52 #endif 53
