1/*
2 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
3 * Copyright (C) 2014 Igalia S.L.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
15 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
24 * THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#ifndef BitmapTexture_h
28#define BitmapTexture_h
29
30#include "IntPoint.h"
31#include "IntRect.h"
32#include "IntSize.h"
33#include <wtf/RefCounted.h>
34#include <wtf/RefPtr.h>
35
36namespace WebCore {
37
38class FilterOperations;
39class GraphicsLayer;
40class Image;
41class TextureMapper;
42
43// A 2D texture that can be the target of software or GL rendering.
44class BitmapTexture : public RefCounted<BitmapTexture> {
45public:
46 enum Flag {
47 NoFlag = 0,
48 SupportsAlpha = 0x01,
49 };
50
51 typedef unsigned Flags;
52
53 BitmapTexture()
54 : m_flags(0)
55 {
56 }
57
58 virtual ~BitmapTexture() = default;
59 virtual bool isBackedByOpenGL() const { return false; }
60
61 virtual IntSize size() const = 0;
62 virtual void updateContents(Image*, const IntRect&, const IntPoint& offset) = 0;
63 virtual void updateContents(TextureMapper&, GraphicsLayer*, const IntRect& target, const IntPoint& offset, float scale = 1);
64 virtual void updateContents(const void*, const IntRect& target, const IntPoint& offset, int bytesPerLine) = 0;
65 virtual bool isValid() const = 0;
66 inline Flags flags() const { return m_flags; }
67
68 virtual int bpp() const { return 32; }
69 void reset(const IntSize& size, Flags flags = 0)
70 {
71 m_flags = flags;
72 m_contentSize = size;
73 didReset();
74 }
75 virtual void didReset() { }
76
77 inline IntSize contentSize() const { return m_contentSize; }
78 inline int numberOfBytes() const { return size().width() * size().height() * bpp() >> 3; }
79 inline bool isOpaque() const { return !(m_flags & SupportsAlpha); }
80
81 virtual RefPtr<BitmapTexture> applyFilters(TextureMapper&, const FilterOperations&) { return this; }
82
83protected:
84 IntSize m_contentSize;
85
86private:
87 Flags m_flags;
88};
89
90}
91
92#endif // BitmapTexture_h
93