1/*
2 Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public
6 License as published by the Free Software Foundation; either
7 version 2 of the License, or (at your option) any later version.
8
9 This library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public License
15 along with this library; see the file COPYING.LIB.  If not, write to
16 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 Boston, MA 02110-1301, USA.
18 */
19
20#ifndef TextureMapperImageBuffer_h
21#define TextureMapperImageBuffer_h
22
23#include "ImageBuffer.h"
24#include "TextureMapper.h"
25
26#if USE(TEXTURE_MAPPER)
27namespace WebCore {
28
29class BitmapTextureImageBuffer : public BitmapTexture {
30    friend class TextureMapperImageBuffer;
31public:
32    static PassRefPtr<BitmapTexture> create() { return adoptRef(new BitmapTextureImageBuffer); }
33    virtual IntSize size() const { return m_image->internalSize(); }
34    virtual void didReset();
35    virtual bool isValid() const { return m_image.get(); }
36    inline GraphicsContext* graphicsContext() { return m_image ? m_image->context() : 0; }
37    virtual void updateContents(Image*, const IntRect&, const IntPoint&, UpdateContentsFlag);
38    virtual void updateContents(TextureMapper*, GraphicsLayer*, const IntRect& target, const IntPoint& offset, UpdateContentsFlag);
39    virtual void updateContents(const void*, const IntRect& target, const IntPoint& sourceOffset, int bytesPerLine, UpdateContentsFlag);
40#if ENABLE(CSS_FILTERS)
41    PassRefPtr<BitmapTexture> applyFilters(TextureMapper*, const FilterOperations&);
42#endif
43
44private:
45    BitmapTextureImageBuffer() { }
46    std::unique_ptr<ImageBuffer> m_image;
47};
48
49
50class TextureMapperImageBuffer : public TextureMapper {
51    WTF_MAKE_FAST_ALLOCATED;
52public:
53    TextureMapperImageBuffer()
54        : TextureMapper(SoftwareMode)
55    { }
56
57    // TextureMapper implementation
58    virtual void drawBorder(const Color&, float borderWidth, const FloatRect&, const TransformationMatrix&) override;
59    virtual void drawNumber(int number, const Color&, const FloatPoint&, const TransformationMatrix&) override;
60    virtual void drawTexture(const BitmapTexture&, const FloatRect& targetRect, const TransformationMatrix&, float opacity, unsigned exposedEdges) override;
61    virtual void drawSolidColor(const FloatRect&, const TransformationMatrix&, const Color&) override;
62    virtual void beginClip(const TransformationMatrix&, const FloatRect&) override;
63    virtual void bindSurface(BitmapTexture* surface) override { m_currentSurface = surface;}
64    virtual void endClip() override { graphicsContext()->restore(); }
65    virtual IntRect clipBounds() override { return currentContext()->clipBounds(); }
66    virtual IntSize maxTextureSize() const;
67    virtual PassRefPtr<BitmapTexture> createTexture() override { return BitmapTextureImageBuffer::create(); }
68
69    inline GraphicsContext* currentContext()
70    {
71        return m_currentSurface ? static_cast<BitmapTextureImageBuffer*>(m_currentSurface.get())->graphicsContext() : graphicsContext();
72    }
73
74private:
75    RefPtr<BitmapTexture> m_currentSurface;
76};
77
78}
79#endif // USE(TEXTURE_MAPPER)
80
81#endif // TextureMapperImageBuffer_h
82