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 class SkPicture; 15 16 extern SkBitmap::Config SkImageInfoToBitmapConfig(const SkImageInfo&); 17 18 // Call this if you explicitly want to use/share this pixelRef in the image 19 extern SkImage* SkNewImageFromPixelRef(const SkImageInfo&, SkPixelRef*, 20 size_t rowBytes); 21 22 /** 23 * Examines the bitmap to decide if it can share the existing pixelRef, or 24 * if it needs to make a deep-copy of the pixels. The bitmap's pixelref will 25 * be shared if either the bitmap is marked as immutable, or canSharePixelRef 26 * is true. 27 * 28 * If the bitmap's config cannot be converted into a corresponding 29 * SkImageInfo, or the bitmap's pixels cannot be accessed, this will return 30 * NULL. 31 */ 32 extern SkImage* SkNewImageFromBitmap(const SkBitmap&, bool canSharePixelRef); 33 34 extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*, 35 SkScalar x, SkScalar y, const SkPaint*); 36 37 extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*, 38 const SkRect*, const SkRect&, const SkPaint*); 39 40 /** 41 * Return an SkImage whose contents are those of the specified picture. Note: 42 * The picture itself is unmodified, and may continue to be used for recording 43 */ 44 extern SkImage* SkNewImageFromPicture(const SkPicture*); 45 46 static inline size_t SkImageMinRowBytes(const SkImageInfo& info) { 47 return SkAlign4(info.minRowBytes()); 48 } 49 50 // Given an image created from SkNewImageFromBitmap, return its pixelref. This 51 // may be called to see if the surface and the image share the same pixelref, 52 // in which case the surface may need to perform a copy-on-write. 53 extern SkPixelRef* SkBitmapImageGetPixelRef(SkImage* rasterImage); 54 55 // Given an image created with NewPicture, return its SkPicture. 56 extern SkPicture* SkPictureImageGetPicture(SkImage* pictureImage); 57 58 // Given an image created with NewTexture, return its GrTexture. This 59 // may be called to see if the surface and the image share the same GrTexture, 60 // in which case the surface may need to perform a copy-on-write. 61 extern GrTexture* SkTextureImageGetTexture(SkImage* textureImage); 62 63 // Update the texture wrapped by an image created with NewTexture. This 64 // is called when a surface and image share the same GrTexture and the 65 // surface needs to perform a copy-on-write 66 extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture); 67 68 #endif 69
