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/*
* Copyright (c) 2010, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SharedGraphicsContext3D_h
#define SharedGraphicsContext3D_h
#include "GraphicsTypes.h"
#include "ImageSource.h"
#include "Texture.h"
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/OwnPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class AffineTransform;
class Color;
class GraphicsContext3D;
class FloatRect;
class HostWindow;
class IntSize;
class SolidFillShader;
class TexShader;
typedef HashMap<NativeImagePtr, RefPtr<Texture> > TextureHashMap;
class SharedGraphicsContext3D : public RefCounted<SharedGraphicsContext3D> {
public:
static PassRefPtr<SharedGraphicsContext3D> create(HostWindow*);
~SharedGraphicsContext3D();
// Functions that delegate directly to GraphicsContext3D, with caching
void makeContextCurrent();
void bindFramebuffer(unsigned framebuffer);
void setViewport(const IntSize&);
void scissor(const FloatRect&);
void enable(unsigned capacity);
void disable(unsigned capacity);
void clearColor(const Color&);
void clear(unsigned mask);
void drawArrays(unsigned long mode, long first, long count);
unsigned long getError();
void getIntegerv(unsigned long pname, int* value);
void flush();
unsigned createFramebuffer();
unsigned createTexture();
void deleteFramebuffer(unsigned framebuffer);
void deleteTexture(unsigned texture);
void framebufferTexture2D(unsigned long target, unsigned long attachment, unsigned long textarget, unsigned, long level);
void texParameteri(unsigned target, unsigned pname, int param);
int texImage2D(unsigned target, unsigned level, unsigned internalformat, unsigned width, unsigned height, unsigned border, unsigned format, unsigned type, void* pixels);
int texSubImage2D(unsigned target, unsigned level, unsigned xoffset, unsigned yoffset, unsigned width, unsigned height, unsigned format, unsigned type, void* pixels);
void readPixels(long x, long y, unsigned long width, unsigned long height, unsigned long format, unsigned long type, void* data);
bool paintsIntoCanvasBuffer() const;
// Shared logic for canvas 2d
void applyCompositeOperator(CompositeOperator);
void useQuadVertices();
void useFillSolidProgram(const AffineTransform&, const Color&);
void useTextureProgram(const AffineTransform&, const AffineTransform&, float alpha);
void setActiveTexture(unsigned textureUnit);
void bindTexture(unsigned target, unsigned texture);
bool supportsBGRA();
// GL_CHROMIUM_copy_texture_to_parent_texture
bool supportsCopyTextureToParentTextureCHROMIUM();
void copyTextureToParentTextureCHROMIUM(unsigned texture, unsigned parentTexture);
// Creates a texture associated with the given image. Is owned by this context's
// TextureHashMap.
Texture* createTexture(NativeImagePtr, Texture::Format, int width, int height);
Texture* getTexture(NativeImagePtr);
// Multiple SharedGraphicsContext3D can exist in a single process (one per compositing context) and the same
// NativeImagePtr may be uploaded as a texture into all of them. This function removes uploaded textures
// for a given NativeImagePtr in all contexts.
static void removeTexturesFor(NativeImagePtr);
// Creates a texture that is not associated with any image. The caller takes ownership of
// the texture.
PassRefPtr<Texture> createTexture(Texture::Format, int width, int height);
GraphicsContext3D* graphicsContext3D() const { return m_context.get(); }
private:
SharedGraphicsContext3D(PassRefPtr<GraphicsContext3D>, PassOwnPtr<SolidFillShader>, PassOwnPtr<TexShader>);
// Used to implement removeTexturesFor(), see the comment above.
static HashSet<SharedGraphicsContext3D*>* allContexts();
void removeTextureFor(NativeImagePtr);
RefPtr<GraphicsContext3D> m_context;
unsigned m_quadVertices;
OwnPtr<SolidFillShader> m_solidFillShader;
OwnPtr<TexShader> m_texShader;
TextureHashMap m_textures;
};
} // namespace WebCore
#endif // SharedGraphicsContext3D_h
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