1 /*
2  * Copyright 2017 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 #ifndef SkKeyedImage_DEFINED
8 #define SkKeyedImage_DEFINED
9 
10 #include "include/core/SkBitmap.h"
11 #include "include/core/SkImage.h"
12 #include "src/pdf/SkBitmapKey.h"
13 
14 /**
15    This class has all the advantages of SkBitmaps and SkImages.
16 
17    The SkImage holds on to encoded data.  The SkBitmapKey properly de-dups subsets.
18  */
19 class SkKeyedImage {
20 public:
SkKeyedImage()21     SkKeyedImage() {}
22     SkKeyedImage(sk_sp<SkImage>);
23     SkKeyedImage(const SkBitmap&);
24     SkKeyedImage(SkKeyedImage&&) = default;
25     SkKeyedImage(const SkKeyedImage&) = default;
26 
27     SkKeyedImage& operator=(SkKeyedImage&&) = default;
28     SkKeyedImage& operator=(const SkKeyedImage&) = default;
29 
30     explicit operator bool() const { return fImage != nullptr; }
key()31     const SkBitmapKey& key() const { return fKey; }
image()32     const sk_sp<SkImage>& image() const { return fImage; }
33     sk_sp<SkImage> release();
34     SkKeyedImage subset(SkIRect subset) const;
35 
36 private:
37     sk_sp<SkImage> fImage;
38     SkBitmapKey fKey = {{0, 0, 0, 0}, 0};
39 };
40 
41 /**
42  *  Given an Image, return the Bitmap Key that corresponds to it.  If the Image
43  *  wraps a Bitmap, use that Bitmap's key.
44  */
45 SkBitmapKey SkBitmapKeyFromImage(const SkImage*);
46 #endif  // SkKeyedImage_DEFINED
47