blob: eb1b096a04114a5f3cc2f6baf0bc931036faa782 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SKIA_EXT_LAZY_PIXEL_REF_H_
#define SKIA_EXT_LAZY_PIXEL_REF_H_
#include "third_party/skia/include/core/SkPixelRef.h"
#include "third_party/skia/include/core/SkRect.h"
namespace skia {
// This class extends SkPixelRef to facilitate lazy image decoding on the impl
// thread.
class SK_API LazyPixelRef : public SkPixelRef {
public:
LazyPixelRef() : SkPixelRef(0) {}
virtual ~LazyPixelRef() {}
struct PrepareParams {
// Clipping rect for this pixel ref.
SkIRect clip_rect;
};
// Request the ImageDecodingStore to prepare image decoding for the
// given clipping rect. Returns true is succeeded, or false otherwise.
virtual bool PrepareToDecode(const PrepareParams& params) = 0;
// Start decoding the image.
virtual void Decode() = 0;
};
} // namespace skia
#endif // SKIA_EXT_LAZY_PIXEL_REF_H_
|
