michael@0: /*
michael@0:  * Copyright 2012 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef SkImagePriv_DEFINED
michael@0: #define SkImagePriv_DEFINED
michael@0: 
michael@0: #include "SkBitmap.h"
michael@0: #include "SkImage.h"
michael@0: 
michael@0: class SkPicture;
michael@0: 
michael@0: extern SkBitmap::Config SkImageInfoToBitmapConfig(const SkImageInfo&);
michael@0: 
michael@0: // Call this if you explicitly want to use/share this pixelRef in the image
michael@0: extern SkImage* SkNewImageFromPixelRef(const SkImageInfo&, SkPixelRef*,
michael@0:                                        size_t rowBytes);
michael@0: 
michael@0: /**
michael@0:  *  Examines the bitmap to decide if it can share the existing pixelRef, or
michael@0:  *  if it needs to make a deep-copy of the pixels. The bitmap's pixelref will
michael@0:  *  be shared if either the bitmap is marked as immutable, or canSharePixelRef
michael@0:  *  is true.
michael@0:  *
michael@0:  *  If the bitmap's config cannot be converted into a corresponding
michael@0:  *  SkImageInfo, or the bitmap's pixels cannot be accessed, this will return
michael@0:  *  NULL.
michael@0:  */
michael@0: extern SkImage* SkNewImageFromBitmap(const SkBitmap&, bool canSharePixelRef);
michael@0: 
michael@0: extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*,
michael@0:                                    SkScalar x, SkScalar y, const SkPaint*);
michael@0: 
michael@0: extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*,
michael@0:                                    const SkRect*, const SkRect&, const SkPaint*);
michael@0: 
michael@0: /**
michael@0:  *  Return an SkImage whose contents are those of the specified picture. Note:
michael@0:  *  The picture itself is unmodified, and may continue to be used for recording
michael@0:  */
michael@0: extern SkImage* SkNewImageFromPicture(const SkPicture*);
michael@0: 
michael@0: static inline size_t SkImageMinRowBytes(const SkImageInfo& info) {
michael@0:     return SkAlign4(info.minRowBytes());
michael@0: }
michael@0: 
michael@0: // Given an image created from SkNewImageFromBitmap, return its pixelref. This
michael@0: // may be called to see if the surface and the image share the same pixelref,
michael@0: // in which case the surface may need to perform a copy-on-write.
michael@0: extern SkPixelRef* SkBitmapImageGetPixelRef(SkImage* rasterImage);
michael@0: 
michael@0: // Given an image created with NewPicture, return its SkPicture.
michael@0: extern SkPicture* SkPictureImageGetPicture(SkImage* pictureImage);
michael@0: 
michael@0: // Given an image created with NewTexture, return its GrTexture. This
michael@0: // may be called to see if the surface and the image share the same GrTexture,
michael@0: // in which case the surface may need to perform a copy-on-write.
michael@0: extern GrTexture* SkTextureImageGetTexture(SkImage* textureImage);
michael@0: 
michael@0: // Update the texture wrapped by an image created with NewTexture. This
michael@0: // is called when a surface and image share the same GrTexture and the
michael@0: // surface needs to perform a copy-on-write
michael@0: extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture);
michael@0: 
michael@0: #endif