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