1/*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 * Copyright (C) 2010 Google Inc. All rights reserved.
4 * Copyright (C) 2010 Mozilla Corporation. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#if ENABLE(GRAPHICS_CONTEXT_3D)
29
30#include "GraphicsContext3D.h"
31#include <wtf/StdLibExtras.h>
32#include <wtf/UniqueArray.h>
33
34namespace WebCore {
35
36class FormatConverter {
37public:
38 FormatConverter(unsigned width, unsigned height, const void* srcStart, void* dstStart, int srcStride, int dstStride)
39 : m_width(width)
40 , m_height(height)
41 , m_srcStart(srcStart)
42 , m_dstStart(dstStart)
43 , m_srcStride(srcStride)
44 , m_dstStride(dstStride)
45 , m_success(false)
46 {
47 const unsigned MaxNumberOfComponents = 4;
48 const unsigned MaxBytesPerComponent = 4;
49 m_unpackedIntermediateSrcData = makeUniqueArray<uint8_t>((Checked<size_t>(m_width) * MaxNumberOfComponents * MaxBytesPerComponent).unsafeGet());
50
51 ASSERT(m_unpackedIntermediateSrcData.get());
52 }
53
54 void convert(GraphicsContext3D::DataFormat srcFormat, GraphicsContext3D::DataFormat dstFormat, GraphicsContext3D::AlphaOp);
55 bool success() const { return m_success; }
56
57private:
58 template<GraphicsContext3D::DataFormat SrcFormat>
59 ALWAYS_INLINE void convert(GraphicsContext3D::DataFormat dstFormat, GraphicsContext3D::AlphaOp);
60
61 template<GraphicsContext3D::DataFormat SrcFormat, GraphicsContext3D::DataFormat DstFormat>
62 ALWAYS_INLINE void convert(GraphicsContext3D::AlphaOp);
63
64 template<GraphicsContext3D::DataFormat SrcFormat, GraphicsContext3D::DataFormat DstFormat, GraphicsContext3D::AlphaOp alphaOp>
65 ALWAYS_INLINE void convert();
66
67 const unsigned m_width, m_height;
68 const void* const m_srcStart;
69 void* const m_dstStart;
70 const int m_srcStride, m_dstStride;
71 bool m_success;
72 UniqueArray<uint8_t> m_unpackedIntermediateSrcData;
73};
74
75} // namespace WebCore
76
77#endif // ENABLE(GRAPHICS_CONTEXT_3D)
78