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/*
Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef TextureMapper_h
#define TextureMapper_h
#if USE(ACCELERATED_COMPOSITING)
#if (defined(QT_OPENGL_LIB))
#if defined(QT_OPENGL_ES_2) && !defined(TEXMAP_OPENGL_ES_2)
#define TEXMAP_OPENGL_ES_2
#endif
#endif
#include "GraphicsContext.h"
#include "IntRect.h"
#include "IntSize.h"
#include "TransformationMatrix.h"
/*
TextureMapper is a mechanism that enables hardware acceleration of CSS animations (accelerated compositing) without
a need for a platform specific scene-graph library like CoreAnimations or QGraphicsView.
*/
namespace WebCore {
class TextureMapper;
// A 2D texture that can be the target of software or GL rendering.
class BitmapTexture : public RefCounted<BitmapTexture> {
public:
BitmapTexture() : m_lockCount(0) {}
virtual ~BitmapTexture() { }
virtual bool allowOfflineTextureUpload() const { return false; }
virtual void destroy() = 0;
virtual IntSize size() const = 0;
virtual bool isValid() const = 0;
virtual void reset(const IntSize& size, bool opaque = false)
{
m_isOpaque = opaque;
m_contentSize = size;
}
virtual PlatformGraphicsContext* beginPaint(const IntRect& dirtyRect) = 0;
virtual void endPaint() = 0;
virtual PlatformGraphicsContext* beginPaintMedia()
{
return beginPaint(IntRect(0, 0, size().width(), size().height()));
}
virtual void setContentsToImage(Image*) = 0;
virtual bool save(const String& filename) { return false; }
inline void lock() { ++m_lockCount; }
inline void unlock() { --m_lockCount; }
inline bool isLocked() { return m_lockCount; }
inline IntSize contentSize() const { return m_contentSize; }
inline void setOffset(const IntPoint& o) { m_offset = o; }
inline IntPoint offset() const { return m_offset; }
private:
int m_lockCount;
IntSize m_contentSize;
bool m_isOpaque;
IntPoint m_offset;
};
// A "context" class used to encapsulate accelerated texture mapping functions: i.e. drawing a texture
// onto the screen or into another texture with a specified transform, opacity and mask.
class TextureMapper : public RefCounted<TextureMapper> {
friend class BitmapTexture;
public:
static PassRefPtr<TextureMapper> create(GraphicsContext*);
virtual ~TextureMapper() { }
virtual void drawTexture(const BitmapTexture& texture, const IntRect& target, const TransformationMatrix& matrix = TransformationMatrix(), float opacity = 1.0f, const BitmapTexture* maskTexture = 0) = 0;
// makes a surface the target for the following drawTexture calls.
virtual void bindSurface(BitmapTexture* surface) = 0;
virtual void paintToTarget(const BitmapTexture& texture, const IntSize&, const TransformationMatrix& matrix, float opacity, const IntRect& visibleRect)
{
drawTexture(texture, IntRect(0, 0, texture.contentSize().width(), texture.contentSize().height()), matrix, opacity, 0);
}
virtual void setClip(const IntRect&) = 0;
virtual bool allowSurfaceForRoot() const = 0;
virtual PassRefPtr<BitmapTexture> createTexture() = 0;
virtual const char* type() const = 0;
virtual void cleanup() {}
GraphicsContext* graphicsContext() const
{
return m_gc;
}
protected:
TextureMapper(GraphicsContext* gc) : m_gc(gc) {}
GraphicsContext* m_gc;
};
};
#endif
#endif
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