ShaderMan.h

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//      File:           ShaderMan.h
//      Author:         Changchang Wu
//      Description : interface for the ShaderMan class.
//                      This is a class that manages all the shaders for SIFT
//
//
//      Copyright (c) 2007 University of North Carolina at Chapel Hill
//      All Rights Reserved
//
//      Permission to use, copy, modify and distribute this software and its
//      documentation for educational, research and non-profit purposes, without
//      fee, and without a written agreement is hereby granted, provided that the
//      above copyright notice and the following paragraph appear in all copies.
//      
//      The University of North Carolina at Chapel Hill make no representations
//      about the suitability of this software for any purpose. It is provided
//      'as is' without express or implied warranty. 
//
//      Please send BUG REPORTS to ccwu@cs.unc.edu
//



#ifndef _SIFT_SHADER_MAN_H
#define _SIFT_SHADER_MAN_H


#include "ProgramGPU.h"
#include "ProgramGLSL.h"
//class ShaderMan
//description:  pure static class
//                              wrapper of shaders from different GPU languages
class SiftParam;
class FilterGLSL;

class ShaderMan
{
public:
        static ShaderBag*   s_bag;
public:
        static void SelectInitialSmoothingFilter(int octave_min, SiftParam&param); 
        static void UseShaderMarginCopy(int xmax, int ymax);
        static void UseShaderOrientation(int gtex, int width, int height, float sigma, int auxtex, float step, int keypoint_list);
        static void UseShaderDescriptor(int gtex, int otex, int dwidth, int fwidth, int width, int height, float sigma);
        static void UseShaderSimpleOrientation(int oTex, float sigma, float sigma_step);
        static void UseShaderCopyKeypoint();
        static void UseShaderGenVBO( float width, float fwidth,  float size);
        static void UseShaderDebug();
        static void UseShaderZeroPass();
        static void UseShaderGenListStart(float fw, int tex0);
        static void UseShaderGenListStep(int tex, int tex0);
        static void UseShaderGenListEnd(int ktex);
        static void UseShaderGenListHisto();
        static void UseShaderGenListInit(int w, int h, int tight = 1);
        static void UseShaderKeypoint(int texU, int texD);
        static void UseShaderGradientPass(int texP = 0);
        static void UseShaderDisplayKeypoints();
        static void UseShaderDisplayGrad();
        static void UseShaderRGB2Gray();
        static void UseShaderDisplayDOG();
        static void UseShaderDisplayGaussian();
    static void FilterInitialImage(GLTexImage* tex, GLTexImage* buf);
    static void FilterSampledImage(GLTexImage* tex, GLTexImage* buf);
    static void FilterImage(FilterProgram* filter, GLTexImage *dst, GLTexImage *src, GLTexImage*tmp);
        static void TextureCopy(GLTexImage*dst, GLTexImage*src);
        static void TextureDownSample(GLTexImage* dst, GLTexImage*src, int scale = 2);
        static void TextureUpSample(GLTexImage* dst, GLTexImage*src, int scale);
        static void InitShaderMan(SiftParam&param);
        static void DestroyShaders();
        static int  HaveShaderMan(){return s_bag != NULL;}
        static void UnloadProgram();
};

#endif