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 19 /** 20 * Examines the bitmap to decide if it can share the existing pixelRef, or 21 * if it needs to make a deep-copy of the pixels. 22 * 23 * The bitmap's pixelref will be shared if either the bitmap is marked as 24 * immutable, or forceSharePixelRef is true. Shared pixel refs are also 25 * locked when kLocked_SharedPixelRefMode is specified. 26 * 27 * Passing kLocked_SharedPixelRefMode allows the image's peekPixels() method 28 * to succeed, but it will force any lazy decodes/generators to execute if 29 * they exist on the pixelref. 30 * 31 * It is illegal to call this with a texture-backed bitmap. 32 * 33 * If the bitmap's colortype cannot be converted into a corresponding 34 * SkImageInfo, or the bitmap's pixels cannot be accessed, this will return 35 * nullptr. 36 */ 37 enum ForceCopyMode { 38 kNo_ForceCopyMode, 39 kYes_ForceCopyMode, // must copy the pixels even if the bitmap is immutable 40 }; 41 extern SkImage* SkNewImageFromRasterBitmap(const SkBitmap&, ForceCopyMode = kNo_ForceCopyMode); 42 43 // Given an image created from SkNewImageFromBitmap, return its pixelref. This 44 // may be called to see if the surface and the image share the same pixelref, 45 // in which case the surface may need to perform a copy-on-write. 46 extern const SkPixelRef* SkBitmapImageGetPixelRef(const SkImage* rasterImage); 47 48 // When a texture is shared by a surface and an image its budgeted status is that of the 49 // surface. This function is used when the surface makes a new texture for itself in order 50 // for the orphaned image to determine whether the original texture counts against the 51 // budget or not. 52 extern void SkTextureImageApplyBudgetedDecision(SkImage* textureImage); 53 54 // Update the texture wrapped by an image created with NewTexture. This 55 // is called when a surface and image share the same GrTexture and the 56 // surface needs to perform a copy-on-write 57 extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture); 58 59 GrTexture* GrDeepCopyTexture(GrTexture* src, SkBudgeted); 60 61 #endif 62
