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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 PLATFORM(QT)
#include <qglobal.h>
#if defined(QT_OPENGL_ES_2) && !defined(TEXMAP_OPENGL_ES_2)
#define TEXMAP_OPENGL_ES_2
#endif
#endif
#if PLATFORM(GTK) && USE(OPENGL_ES_2)
#define TEXMAP_OPENGL_ES_2
#endif
#include "FilterOperations.h"
#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 Flag {
SupportsAlpha = 0x01
};
typedef unsigned Flags;
BitmapTexture()
: m_flags(0)
{
}
virtual ~BitmapTexture() { }
virtual bool isBackedByOpenGL() const { return false; }
virtual IntSize size() const = 0;
virtual void updateContents(Image*, const IntRect&, const IntPoint& offset) = 0;
virtual void updateContents(const void*, const IntRect& target, const IntPoint& offset, int bytesPerLine) = 0;
virtual bool isValid() const = 0;
inline Flags flags() const { return m_flags; }
virtual int bpp() const { return 32; }
virtual bool canReuseWith(const IntSize& contentsSize, Flags flags = 0) { return false; }
void reset(const IntSize& size, Flags flags = 0)
{
m_flags = flags;
m_contentSize = size;
didReset();
}
virtual void didReset() { }
inline IntSize contentSize() const { return m_contentSize; }
inline int numberOfBytes() const { return size().width() * size().height() * bpp() >> 3; }
inline bool isOpaque() const { return !(m_flags & SupportsAlpha); }
#if ENABLE(CSS_FILTERS)
virtual PassRefPtr<BitmapTexture> applyFilters(TextureMapper*, const BitmapTexture& contentTexture, const FilterOperations&) { return this; }
#endif
protected:
IntSize m_contentSize;
private:
Flags m_flags;
};
// 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 {
WTF_MAKE_FAST_ALLOCATED;
friend class BitmapTexture;
public:
enum AccelerationMode { SoftwareMode, OpenGLMode };
enum PaintFlag {
PaintingMirrored = 1 << 0,
};
typedef unsigned PaintFlags;
static PassOwnPtr<TextureMapper> create(AccelerationMode newMode = SoftwareMode);
virtual ~TextureMapper() { }
enum ExposedEdges {
NoEdges = 0,
LeftEdge = 1 << 0,
RightEdge = 1 << 1,
TopEdge = 1 << 2,
BottomEdge = 1 << 3,
AllEdges = LeftEdge | RightEdge | TopEdge | BottomEdge,
};
virtual void drawBorder(const Color&, float borderWidth, const FloatRect& targetRect, const TransformationMatrix& modelViewMatrix = TransformationMatrix()) = 0;
virtual void drawRepaintCounter(int value, int pointSize, const FloatPoint&, const TransformationMatrix& modelViewMatrix = TransformationMatrix()) = 0;
virtual void drawTexture(const BitmapTexture&, const FloatRect& target, const TransformationMatrix& modelViewMatrix = TransformationMatrix(), float opacity = 1.0f, const BitmapTexture* maskTexture = 0, unsigned exposedEdges = AllEdges) = 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; }
AccelerationMode accelerationMode() const { return m_accelerationMode; }
virtual void beginPainting(PaintFlags flags = 0) { }
virtual void endPainting() { }
virtual IntSize maxTextureSize() const { return IntSize(INT_MAX, INT_MAX); }
// A surface is released implicitly when dereferenced.
virtual PassRefPtr<BitmapTexture> acquireTextureFromPool(const IntSize&);
protected:
TextureMapper(AccelerationMode accelerationMode)
: m_interpolationQuality(InterpolationDefault)
, m_textDrawingMode(TextModeFill)
, m_accelerationMode(accelerationMode)
{}
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;
AccelerationMode m_accelerationMode;
};
}
#endif
#endif
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