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 SkImage::Info&, 17 bool* isOpaque); 18 19 extern int SkImageBytesPerPixel(SkImage::ColorType); 20 21 extern bool SkBitmapToImageInfo(const SkBitmap&, SkImage::Info*); 22 23 // Call this if you explicitly want to use/share this pixelRef in the image 24 extern SkImage* SkNewImageFromPixelRef(const SkImage::Info&, SkPixelRef*, 25 size_t rowBytes); 26 27 /** 28 * Examines the bitmap to decide if it can share the existing pixelRef, or 29 * if it needs to make a deep-copy of the pixels. The bitmap's pixelref will 30 * be shared if either the bitmap is marked as immutable, or canSharePixelRef 31 * is true. 32 * 33 * If the bitmap's config cannot be converted into a corresponding 34 * SkImage::Info, or the bitmap's pixels cannot be accessed, this will return 35 * NULL. 36 */ 37 extern SkImage* SkNewImageFromBitmap(const SkBitmap&, bool canSharePixelRef); 38 39 extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*, 40 SkScalar x, SkScalar y, const SkPaint*); 41 42 /** 43 * Return an SkImage whose contents are those of the specified picture. Note: 44 * The picture itself is unmodified, and may continue to be used for recording 45 */ 46 extern SkImage* SkNewImageFromPicture(const SkPicture*); 47 48 static inline size_t SkImageMinRowBytes(const SkImage::Info& info) { 49 size_t rb = info.fWidth * SkImageBytesPerPixel(info.fColorType); 50 return SkAlign4(rb); 51 } 52 53 // Given an image created from SkNewImageFromBitmap, return its pixelref. This 54 // may be called to see if the surface and the image share the same pixelref, 55 // in which case the surface may need to perform a copy-on-write. 56 extern SkPixelRef* SkBitmapImageGetPixelRef(SkImage* rasterImage); 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* rasterImage); 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
