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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 "TextureMapperPlatformLayer.h"
#include "TransformationMatrix.h"
#include <wtf/UnusedParam.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:
enum PixelFormat { BGRAFormat, RGBAFormat, BGRFormat, RGBFormat };
BitmapTexture()
: m_isOpaque(true)
{
}
virtual ~BitmapTexture() { }
virtual void destroy() { }
virtual IntSize size() const = 0;
virtual void updateContents(Image*, const IntRect&, const IntRect&, BitmapTexture::PixelFormat) = 0;
virtual void updateContents(const void*, const IntRect&) = 0;
virtual bool isValid() const = 0;
virtual int bpp() const { return 32; }
virtual void reset(const IntSize& size, bool opaque = false)
{
m_isOpaque = opaque;
m_contentSize = size;
}
inline IntSize contentSize() const { return m_contentSize; }
inline int numberOfBytes() const { return size().width() * size().height() * bpp() >> 3; }
inline bool isOpaque() const { return m_isOpaque; }
protected:
IntSize m_contentSize;
bool m_isOpaque;
};
// 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 {
friend class BitmapTexture;
public:
enum AccelerationMode { SoftwareMode, OpenGLMode };
static PassOwnPtr<TextureMapper> create(AccelerationMode newMode = SoftwareMode);
virtual ~TextureMapper() { }
virtual void drawTexture(const BitmapTexture&, const FloatRect& target, const TransformationMatrix& modelViewMatrix = 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 setGraphicsContext(GraphicsContext* context) { m_context = context; }
virtual GraphicsContext* graphicsContext() { return m_context; }
virtual void beginClip(const TransformationMatrix&, const FloatRect&) = 0;
virtual void endClip() = 0;
virtual PassRefPtr<BitmapTexture> createTexture() = 0;
void setImageInterpolationQuality(InterpolationQuality quality) { m_interpolationQuality = quality; }
void setTextDrawingMode(TextDrawingModeFlags mode) { m_textDrawingMode = mode; }
InterpolationQuality imageInterpolationQuality() const { return m_interpolationQuality; }
TextDrawingModeFlags textDrawingMode() const { return m_textDrawingMode; }
virtual AccelerationMode accelerationMode() const = 0;
virtual void beginPainting() { }
virtual void endPainting() { }
// A surface is released implicitly when dereferenced.
virtual PassRefPtr<BitmapTexture> acquireTextureFromPool(const IntSize&);
protected:
TextureMapper()
: m_interpolationQuality(InterpolationDefault)
, m_textDrawingMode(TextModeFill)
{}
private:
#if USE(TEXTURE_MAPPER_GL)
static PassOwnPtr<TextureMapper> platformCreateAccelerated();
#else
static PassOwnPtr<TextureMapper> platformCreateAccelerated()
{
return PassOwnPtr<TextureMapper>();
}
#endif
InterpolationQuality m_interpolationQuality;
TextDrawingModeFlags m_textDrawingMode;
Vector<RefPtr<BitmapTexture> > m_texturePool;
GraphicsContext* m_context;
};
}
#endif
#endif
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