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