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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#ifndef _GPUFilter_H_
#define _GPUFilter_H_
#include "../api.h"
#include "Filter.h"
#include "VertexArray.h"
#include "Bitmap.h"
#include "TextureMover.h"
#include "FBO.h"
namespace avg {
class ImagingProjection;
typedef boost::shared_ptr<ImagingProjection> ImagingProjectionPtr;
class OGLShader;
typedef boost::shared_ptr<OGLShader> OGLShaderPtr;
class AVG_API GPUFilter: public Filter
{
public:
GPUFilter(const std::string& sShaderID, bool bUseAlpha, bool bStandalone=false,
unsigned numTextures=1, bool bMipmap=false);
GPUFilter(PixelFormat pfSrc, PixelFormat pfDest, bool bStandalone,
const std::string& sShaderID, unsigned numTextures=1, bool bMipmap=false);
virtual ~GPUFilter();
virtual BitmapPtr apply(BitmapPtr pBmpSource);
virtual void apply(GLTexturePtr pSrcTex);
virtual void applyOnGPU(GLTexturePtr pSrcTex) = 0;
GLTexturePtr getDestTex(int i=0) const;
BitmapPtr getImage() const;
FBOPtr getFBO(int i=0);
const IntRect& getDestRect() const;
const IntPoint& getSrcSize() const;
FRect getRelDestRect() const;
protected:
void setDimensions(const IntPoint& srcSize);
void setDimensions(const IntPoint& srcSize, const IntRect& destRect,
unsigned texMode);
const OGLShaderPtr& getShader() const;
void draw(GLTexturePtr pTex);
int getBlurKernelRadius(float stdDev) const;
GLTexturePtr calcBlurKernelTex(float stdDev, float opacity, bool bUseFloat) const;
private:
PixelFormat m_PFSrc;
PixelFormat m_PFDest;
bool m_bStandalone;
unsigned m_NumTextures;
bool m_bMipmap;
GLTexturePtr m_pSrcTex;
TextureMoverPtr m_pSrcMover;
std::vector<FBOPtr> m_pFBOs;
IntPoint m_SrcSize;
IntRect m_DestRect;
OGLShaderPtr m_pShader;
ImagingProjectionPtr m_pProjection;
};
typedef boost::shared_ptr<GPUFilter> GPUFilterPtr;
}
#endif
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