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GLTexImage.cpp
1295 lines (1124 loc) · 35.3 KB
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GLTexImage.cpp
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////////////////////////////////////////////////////////////////////////////
// File: GLTexImage.cpp
// Author: Changchang Wu
// Description : implementation of the GLTexImage class.
//
//
//
// 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
//
////////////////////////////////////////////////////////////////////////////
#include "GL/glew.h"
#include <stdio.h>
#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <stdlib.h>
#include <math.h>
using namespace std;
#include "GlobalUtil.h"
#include "GLTexImage.h"
#include "FrameBufferObject.h"
#include "ShaderMan.h"
//#define SIFTGPU_NO_DEVIL
#ifndef SIFTGPU_NO_DEVIL
#include "IL/il.h"
#if defined(_WIN64)
//#pragma comment(lib, "../../lib/DevIL64.lib")
#elif defined(_WIN32)
//#pragma comment(lib, "../../lib/DevIL.lib")
#endif
#else
#include <string.h>
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
GLTexImage::GLTexImage()
{
_imgWidth = _imgHeight = 0;
_texWidth = _texHeight = 0;
_drawWidth = _drawHeight = 0;
_texID = 0;
}
GLTexImage::~GLTexImage()
{
if(_texID) glDeleteTextures(1, &_texID);
}
int GLTexImage::CheckTexture()
{
if(_texID)
{
GLint tw, th;
BindTex();
glGetTexLevelParameteriv(_texTarget, 0, GL_TEXTURE_WIDTH , &tw);
glGetTexLevelParameteriv(_texTarget, 0, GL_TEXTURE_HEIGHT , &th);
UnbindTex();
return tw == _texWidth && th == _texHeight;
}else
{
return _texWidth == 0 && _texHeight ==0;
}
}
//set a dimension that is smaller than the actuall size
//for drawQuad
void GLTexImage::SetImageSize( int width, int height)
{
_drawWidth = _imgWidth = width;
_drawHeight = _imgHeight = height;
}
void GLTexImage::InitTexture( int width, int height, int clamp_to_edge)
{
if(_texID && width == _texWidth && height == _texHeight ) return;
if(_texID==0) glGenTextures(1, &_texID);
_texWidth = _imgWidth = _drawWidth = width;
_texHeight = _imgHeight = _drawHeight = height;
BindTex();
if(clamp_to_edge)
{
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}else
{
//out of bound tex read returns 0??
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
}
glTexParameteri(_texTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(_texTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexImage2D(_texTarget, 0, _iTexFormat,
_texWidth, _texHeight, 0, GL_RGBA, GL_FLOAT, NULL);
CheckErrorsGL("glTexImage2D");
UnbindTex();
}
void GLTexImage::InitTexture( int width, int height, int clamp_to_edge, GLuint format)
{
if(_texID && width == _texWidth && height == _texHeight ) return;
if(_texID==0) glGenTextures(1, &_texID);
_texWidth = _imgWidth = _drawWidth = width;
_texHeight = _imgHeight = _drawHeight = height;
BindTex();
if(clamp_to_edge)
{
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}else
{
//out of bound tex read returns 0??
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
}
glTexParameteri(_texTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(_texTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexImage2D(_texTarget, 0, format, _texWidth, _texHeight, 0, GL_RGBA, GL_FLOAT, NULL);
UnbindTex();
}
void GLTexImage::BindTex()
{
glBindTexture(_texTarget, _texID);
}
void GLTexImage::UnbindTex()
{
glBindTexture(_texTarget, 0);
}
void GLTexImage::DrawQuad()
{
glBegin (GL_QUADS);
glTexCoord2i ( 0 , 0 ); glVertex2i ( 0 , 0 );
glTexCoord2i ( 0 , _drawHeight ); glVertex2i ( 0 , _drawHeight );
glTexCoord2i ( _drawWidth , _drawHeight ); glVertex2i ( _drawWidth , _drawHeight );
glTexCoord2i ( _drawWidth , 0 ); glVertex2i ( _drawWidth , 0 );
glEnd ();
glFlush();
}
void GLTexImage::FillMargin(int marginx, int marginy)
{
//
marginx = min(marginx, _texWidth - _imgWidth);
marginy = min(marginy, _texHeight - _imgHeight);
if(marginx >0 || marginy > 0)
{
GlobalUtil::FitViewPort(_imgWidth + marginx, _imgHeight + marginy);
AttachToFBO(0);
BindTex();
ShaderMan::UseShaderMarginCopy(_imgWidth, _imgHeight);
DrawMargin(_imgWidth + marginx, _imgHeight + marginy);
}
}
void GLTexImage::ZeroHistoMargin()
{
ZeroHistoMargin(_imgWidth, _imgHeight);
}
void GLTexImage::ZeroHistoMargin(int width, int height)
{
int marginx = width & 0x01;
int marginy = height & 0x01;
if(marginx >0 || marginy > 0)
{
int right = width + marginx;
int bottom = height + marginy;
GlobalUtil::FitViewPort(right, bottom);
AttachToFBO(0);
ShaderMan::UseShaderZeroPass();
glBegin(GL_QUADS);
if(right > width && _texWidth > width)
{
glTexCoord2i ( width , 0 ); glVertex2i ( width , 0 );
glTexCoord2i ( width , bottom ); glVertex2i ( width , bottom );
glTexCoord2i ( right , bottom ); glVertex2i ( right , bottom );
glTexCoord2i ( right , 0 ); glVertex2i ( right , 0 );
}
if(bottom>height && _texHeight > height)
{
glTexCoord2i ( 0 , height ); glVertex2i ( 0 , height );
glTexCoord2i ( 0 , bottom ); glVertex2i ( 0 , bottom );
glTexCoord2i ( width , bottom ); glVertex2i ( width , bottom );
glTexCoord2i ( width , height ); glVertex2i ( width , height );
}
glEnd();
glFlush();
}
}
void GLTexImage::DrawMargin(int right, int bottom)
{
glBegin(GL_QUADS);
if(right > _drawWidth)
{
glTexCoord2i ( _drawWidth , 0 ); glVertex2i ( _drawWidth , 0 );
glTexCoord2i ( _drawWidth , bottom ); glVertex2i ( _drawWidth , bottom );
glTexCoord2i ( right , bottom ); glVertex2i ( right , bottom );
glTexCoord2i ( right , 0 ); glVertex2i ( right , 0 );
}
if(bottom>_drawHeight)
{
glTexCoord2i ( 0 , _drawHeight ); glVertex2i ( 0 , _drawHeight );
glTexCoord2i ( 0 , bottom ); glVertex2i ( 0 , bottom );
glTexCoord2i ( _drawWidth , bottom ); glVertex2i ( _drawWidth , bottom );
glTexCoord2i ( _drawWidth , _drawHeight ); glVertex2i ( _drawWidth , _drawHeight );
}
glEnd();
glFlush();
}
void GLTexImage::DrawQuadMT4()
{
int w = _drawWidth, h = _drawHeight;
glBegin (GL_QUADS);
glMultiTexCoord2i( GL_TEXTURE0, 0 , 0 );
glMultiTexCoord2i( GL_TEXTURE1, -1 , 0 );
glMultiTexCoord2i( GL_TEXTURE2, 1 , 0 );
glMultiTexCoord2i( GL_TEXTURE3, 0 , -1 );
glMultiTexCoord2i( GL_TEXTURE4, 0 , 1 );
glVertex2i ( 0 , 0 );
glMultiTexCoord2i( GL_TEXTURE0, 0 , h );
glMultiTexCoord2i( GL_TEXTURE1, -1 , h );
glMultiTexCoord2i( GL_TEXTURE2, 1 , h );
glMultiTexCoord2i( GL_TEXTURE3, 0 , h -1 );
glMultiTexCoord2i( GL_TEXTURE4, 0 , h +1 );
glVertex2i ( 0 , h );
glMultiTexCoord2i( GL_TEXTURE0, w , h );
glMultiTexCoord2i( GL_TEXTURE1, w-1 , h );
glMultiTexCoord2i( GL_TEXTURE2, w+1 , h );
glMultiTexCoord2i( GL_TEXTURE3, w , h-1 );
glMultiTexCoord2i( GL_TEXTURE4, w , h+1 );
glVertex2i ( w , h );
glMultiTexCoord2i( GL_TEXTURE0, w , 0 );
glMultiTexCoord2i( GL_TEXTURE1, w-1 , 0 );
glMultiTexCoord2i( GL_TEXTURE2, w+1 , 0 );
glMultiTexCoord2i( GL_TEXTURE3, w , -1 );
glMultiTexCoord2i( GL_TEXTURE4, w , 1 );
glVertex2i ( w , 0 );
glEnd ();
glFlush();
}
void GLTexImage::DrawQuadMT8()
{
int w = _drawWidth;
int h = _drawHeight;
glBegin (GL_QUADS);
glMultiTexCoord2i( GL_TEXTURE0, 0 , 0 );
glMultiTexCoord2i( GL_TEXTURE1, -1 , 0 );
glMultiTexCoord2i( GL_TEXTURE2, 1 , 0 );
glMultiTexCoord2i( GL_TEXTURE3, 0 , -1 );
glMultiTexCoord2i( GL_TEXTURE4, 0 , 1 );
glMultiTexCoord2i( GL_TEXTURE5, -1 , -1 );
glMultiTexCoord2i( GL_TEXTURE6, -1 , 1 );
glMultiTexCoord2i( GL_TEXTURE7, 1 , -1 );
glVertex2i ( 0 , 0 );
glMultiTexCoord2i( GL_TEXTURE0, 0 , h );
glMultiTexCoord2i( GL_TEXTURE1, -1 , h );
glMultiTexCoord2i( GL_TEXTURE2, 1 , h );
glMultiTexCoord2i( GL_TEXTURE3, 0 , h -1 );
glMultiTexCoord2i( GL_TEXTURE4, 0 , h +1 );
glMultiTexCoord2i( GL_TEXTURE5, -1 , h -1 );
glMultiTexCoord2i( GL_TEXTURE6, -1 , h +1 );
glMultiTexCoord2i( GL_TEXTURE7, 1 , h -1 );
glVertex2i ( 0 , h );
glMultiTexCoord2i( GL_TEXTURE0, w , h );
glMultiTexCoord2i( GL_TEXTURE1, w-1 , h );
glMultiTexCoord2i( GL_TEXTURE2, w+1 , h );
glMultiTexCoord2i( GL_TEXTURE3, w , h -1 );
glMultiTexCoord2i( GL_TEXTURE4, w , h +1 );
glMultiTexCoord2i( GL_TEXTURE5, w-1 , h -1 );
glMultiTexCoord2i( GL_TEXTURE6, w-1 , h +1 );
glMultiTexCoord2i( GL_TEXTURE7, w+1 , h -1 );
glVertex2i ( w , h );
glMultiTexCoord2i( GL_TEXTURE0, w , 0 );
glMultiTexCoord2i( GL_TEXTURE1, w-1 , 0 );
glMultiTexCoord2i( GL_TEXTURE2, w+1 , 0 );
glMultiTexCoord2i( GL_TEXTURE3, w , -1 );
glMultiTexCoord2i( GL_TEXTURE4, w , 1 );
glMultiTexCoord2i( GL_TEXTURE5, w-1 , -1 );
glMultiTexCoord2i( GL_TEXTURE6, w-1 , 1 );
glMultiTexCoord2i( GL_TEXTURE7, w+1 , -1 );
glVertex2i ( w , 0 );
glEnd ();
glFlush();
}
void GLTexImage::DrawImage()
{
DrawQuad();
}
void GLTexImage::FitTexViewPort()
{
GlobalUtil::FitViewPort(_drawWidth, _drawHeight);
}
void GLTexImage::FitRealTexViewPort()
{
GlobalUtil::FitViewPort(_texWidth, _texHeight);
}
void GLTexImage::AttachToFBO(int i)
{
glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, i+GL_COLOR_ATTACHMENT0_EXT, _texTarget, _texID, 0 );
}
void GLTexImage::DetachFBO(int i)
{
glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, i+GL_COLOR_ATTACHMENT0_EXT, _texTarget, 0, 0 );
}
void GLTexImage::DrawQuad(float x1, float x2, float y1, float y2)
{
glBegin (GL_QUADS);
glTexCoord2f ( x1 , y1 ); glVertex2f ( x1 , y1 );
glTexCoord2f ( x1 , y2 ); glVertex2f ( x1 , y2 );
glTexCoord2f ( x2 , y2 ); glVertex2f ( x2 , y2 );
glTexCoord2f ( x2 , y1 ); glVertex2f ( x2 , y1 );
glEnd ();
glFlush();
}
void GLTexImage::TexConvertRGB()
{
//change 3/22/09
FrameBufferObject fbo;
//GlobalUtil::FitViewPort(1, 1);
FitTexViewPort();
AttachToFBO(0);
ShaderMan::UseShaderRGB2Gray();
glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
DrawQuad();
ShaderMan::UnloadProgram();
DetachFBO(0);
}
void GLTexImage::DrawQuadDS(int scale)
{
DrawScaledQuad(float(scale));
}
void GLTexImage::DrawQuadUS(int scale)
{
DrawScaledQuad(1.0f/scale);
}
void GLTexImage::DrawScaledQuad(float texscale)
{
////the texture coordinate for 0.5 is to + 0.5*texscale
float to = 0.5f -0.5f * texscale;
float tx = _imgWidth*texscale +to;
float ty = _imgHeight*texscale +to;
glBegin (GL_QUADS);
glTexCoord2f ( to , to ); glVertex2i ( 0 , 0 );
glTexCoord2f ( to , ty ); glVertex2i ( 0 , _imgHeight );
glTexCoord2f ( tx , ty ); glVertex2i ( _imgWidth , _imgHeight );
glTexCoord2f ( tx , to ); glVertex2i ( _imgWidth , 0 );
glEnd ();
glFlush();
}
void GLTexImage::DrawQuadReduction(int w , int h)
{
float to = -0.5f;
float tx = w*2 +to;
float ty = h*2 +to;
glBegin (GL_QUADS);
glMultiTexCoord2f ( GL_TEXTURE0, to , to );
glMultiTexCoord2f ( GL_TEXTURE1, to +1, to );
glMultiTexCoord2f ( GL_TEXTURE2, to , to+1 );
glMultiTexCoord2f ( GL_TEXTURE3, to +1, to+1 );
glVertex2i ( 0 , 0 );
glMultiTexCoord2f ( GL_TEXTURE0, to , ty );
glMultiTexCoord2f ( GL_TEXTURE1, to +1, ty );
glMultiTexCoord2f ( GL_TEXTURE2, to , ty +1 );
glMultiTexCoord2f ( GL_TEXTURE3, to +1, ty +1 );
glVertex2i ( 0 , h );
glMultiTexCoord2f ( GL_TEXTURE0, tx , ty );
glMultiTexCoord2f ( GL_TEXTURE1, tx +1, ty );
glMultiTexCoord2f ( GL_TEXTURE2, tx , ty +1);
glMultiTexCoord2f ( GL_TEXTURE3, tx +1, ty +1);
glVertex2i ( w , h );
glMultiTexCoord2f ( GL_TEXTURE0, tx , to );
glMultiTexCoord2f ( GL_TEXTURE1, tx +1, to );
glMultiTexCoord2f ( GL_TEXTURE2, tx , to +1 );
glMultiTexCoord2f ( GL_TEXTURE3, tx +1, to +1 );
glVertex2i ( w , 0 );
glEnd ();
glFlush();
}
void GLTexImage::DrawQuadReduction()
{
float to = -0.5f;
float tx = _drawWidth*2 +to;
float ty = _drawHeight*2 +to;
glBegin (GL_QUADS);
glMultiTexCoord2f ( GL_TEXTURE0, to , to );
glMultiTexCoord2f ( GL_TEXTURE1, to +1, to );
glMultiTexCoord2f ( GL_TEXTURE2, to , to+1 );
glMultiTexCoord2f ( GL_TEXTURE3, to +1, to+1 );
glVertex2i ( 0 , 0 );
glMultiTexCoord2f ( GL_TEXTURE0, to , ty );
glMultiTexCoord2f ( GL_TEXTURE1, to +1, ty );
glMultiTexCoord2f ( GL_TEXTURE2, to , ty +1 );
glMultiTexCoord2f ( GL_TEXTURE3, to +1, ty +1 );
glVertex2i ( 0 , _drawHeight );
glMultiTexCoord2f ( GL_TEXTURE0, tx , ty );
glMultiTexCoord2f ( GL_TEXTURE1, tx +1, ty );
glMultiTexCoord2f ( GL_TEXTURE2, tx , ty +1);
glMultiTexCoord2f ( GL_TEXTURE3, tx +1, ty +1);
glVertex2i ( _drawWidth , _drawHeight );
glMultiTexCoord2f ( GL_TEXTURE0, tx , to );
glMultiTexCoord2f ( GL_TEXTURE1, tx +1, to );
glMultiTexCoord2f ( GL_TEXTURE2, tx , to +1 );
glMultiTexCoord2f ( GL_TEXTURE3, tx +1, to +1 );
glVertex2i ( _drawWidth , 0 );
glEnd ();
glFlush();
}
void GLTexPacked::TexConvertRGB()
{
//update the actual size of daw area
_drawWidth = (1 + _imgWidth) >> 1;
_drawHeight = (1 + _imgHeight) >> 1;
///
FrameBufferObject fbo;
GLuint oldTexID = _texID;
glGenTextures(1, &_texID);
glBindTexture(_texTarget, _texID);
glTexImage2D(_texTarget, 0, _iTexFormat, _texWidth, _texHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
//input
glBindTexture(_texTarget, oldTexID);
//output
AttachToFBO(0);
//program
ShaderMan::UseShaderRGB2Gray();
//draw buffer
glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
//run
DrawQuadDS(2);
ShaderMan::UnloadProgram();
glDeleteTextures(1, &oldTexID);
DetachFBO(0);
}
void GLTexPacked::SetImageSize( int width, int height)
{
_imgWidth = width; _drawWidth = (width + 1) >> 1;
_imgHeight = height; _drawHeight = (height + 1) >> 1;
}
void GLTexPacked::InitTexture( int width, int height, int clamp_to_edge)
{
if(_texID && width == _imgWidth && height == _imgHeight ) return;
if(_texID==0) glGenTextures(1, &_texID);
_imgWidth = width;
_imgHeight = height;
if(GlobalUtil::_PreciseBorder)
{
_texWidth = (width + 2) >> 1;
_texHeight = (height + 2) >> 1;
}else
{
_texWidth = (width + 1) >> 1;
_texHeight = (height + 1) >> 1;
}
_drawWidth = (width + 1) >> 1;
_drawHeight = (height + 1) >> 1;
BindTex();
if(clamp_to_edge)
{
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}else
{
//out of bound tex read returns 0??
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri (_texTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
}
glTexParameteri(_texTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(_texTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexImage2D(_texTarget, 0, _iTexFormat,
_texWidth, _texHeight, 0, GL_RGBA, GL_FLOAT, NULL);
UnbindTex();
}
void GLTexPacked::DrawImage()
{
float x1 =0, y1 = 0; //border..
float x2 = _imgWidth*0.5f +x1;
float y2 = _imgHeight*0.5f + y1;
glBegin (GL_QUADS);
glTexCoord2f ( x1 , y1 ); glVertex2i ( 0 , 0 );
glTexCoord2f ( x1 , y2 ); glVertex2i ( 0 , _imgHeight );
glTexCoord2f ( x2 , y2 ); glVertex2i ( _imgWidth , _imgHeight );
glTexCoord2f ( x2 , y1 ); glVertex2i ( _imgWidth , 0 );
glEnd ();
glFlush();
}
void GLTexPacked::DrawQuadUS(int scale)
{
int tw =_drawWidth, th = _drawHeight;
float texscale = 1.0f / scale;
float x1 = 0.5f - 0.5f*scale, y1 = x1;
float x2 = tw * texscale + x1;
float y2 = th * texscale + y1;
float step = texscale *0.5f;
glBegin (GL_QUADS);
glMultiTexCoord2f( GL_TEXTURE0, x1 , y1 );
glMultiTexCoord2f( GL_TEXTURE1, x1+step , y1 );
glMultiTexCoord2f( GL_TEXTURE2, x1 , y1 +step);
glMultiTexCoord2f( GL_TEXTURE3, x1+step , y1 +step);
glVertex2i ( 0 , 0 );
glMultiTexCoord2f( GL_TEXTURE0, x1 , y2 );
glMultiTexCoord2f( GL_TEXTURE1, x1+step , y2 );
glMultiTexCoord2f( GL_TEXTURE2, x1 , y2 +step);
glMultiTexCoord2f( GL_TEXTURE3, x1+step , y2 +step);
glVertex2i ( 0 , th );
glMultiTexCoord2f( GL_TEXTURE0, x2 , y2 );
glMultiTexCoord2f( GL_TEXTURE1, x2+step , y2 );
glMultiTexCoord2f( GL_TEXTURE2, x2 , y2 +step);
glMultiTexCoord2f( GL_TEXTURE3, x2+step , y2 +step);
glVertex2i ( tw , th );
glMultiTexCoord2f( GL_TEXTURE0, x2 , y1 );
glMultiTexCoord2f( GL_TEXTURE1, x2+step , y1 );
glMultiTexCoord2f( GL_TEXTURE2, x2 , y1 +step);
glMultiTexCoord2f( GL_TEXTURE3, x2+step , y1 +step);
glVertex2i ( tw , 0 );
glEnd ();
}
void GLTexPacked::DrawQuadDS(int scale)
{
int tw = _drawWidth;
int th = _drawHeight;
float x1 = 0.5f - 0.5f*scale;
float x2 = tw * scale + x1;
float y1 = 0.5f - 0.5f * scale;
float y2 = th * scale + y1;
int step = scale / 2;
glBegin (GL_QUADS);
glMultiTexCoord2f( GL_TEXTURE0, x1 , y1 );
glMultiTexCoord2f( GL_TEXTURE1, x1+step , y1 );
glMultiTexCoord2f( GL_TEXTURE2, x1 , y1 +step);
glMultiTexCoord2f( GL_TEXTURE3, x1+step , y1 +step);
glVertex2i ( 0 , 0 );
glMultiTexCoord2f( GL_TEXTURE0, x1 , y2 );
glMultiTexCoord2f( GL_TEXTURE1, x1+step , y2 );
glMultiTexCoord2f( GL_TEXTURE2, x1 , y2 +step);
glMultiTexCoord2f( GL_TEXTURE3, x1+step , y2 +step);
glVertex2i ( 0 , th );
glMultiTexCoord2f( GL_TEXTURE0, x2 , y2 );
glMultiTexCoord2f( GL_TEXTURE1, x2+step , y2 );
glMultiTexCoord2f( GL_TEXTURE2, x2 , y2 +step);
glMultiTexCoord2f( GL_TEXTURE3, x2+step , y2 +step);
glVertex2i ( tw , th );
glMultiTexCoord2f( GL_TEXTURE0, x2 , y1 );
glMultiTexCoord2f( GL_TEXTURE1, x2+step , y1 );
glMultiTexCoord2f( GL_TEXTURE2, x2 , y1 +step);
glMultiTexCoord2f( GL_TEXTURE3, x2+step , y1 +step);
glVertex2i ( tw , 0 );
glEnd ();
}
void GLTexPacked::ZeroHistoMargin()
{
int marginx = (((_imgWidth + 3) /4)*4) - _imgWidth;
int marginy = (((-_imgHeight + 3)/4)*4) - _imgHeight;
if(marginx >0 || marginy > 0)
{
int tw = (_imgWidth + marginx ) >> 1;
int th = (_imgHeight + marginy ) >> 1;
tw = min(_texWidth, tw );
th = min(_texHeight, th);
GlobalUtil::FitViewPort(tw, th);
AttachToFBO(0);
BindTex();
ShaderMan::UseShaderZeroPass();
DrawMargin(tw, th, 1, 1);
}
}
void GLTexPacked::FillMargin(int marginx, int marginy)
{
//
marginx = min(marginx, _texWidth * 2 - _imgWidth);
marginy = min(marginy, _texHeight * 2 - _imgHeight);
if(marginx >0 || marginy > 0)
{
int tw = (_imgWidth + marginx + 1) >> 1;
int th = (_imgHeight + marginy + 1) >> 1;
GlobalUtil::FitViewPort(tw, th);
BindTex();
AttachToFBO(0);
ShaderMan::UseShaderMarginCopy(_imgWidth , _imgHeight);
DrawMargin(tw, th, marginx, marginy);
}
}
void GLTexPacked::DrawMargin(int right, int bottom, int mx, int my)
{
int tw = (_imgWidth >>1);
int th = (_imgHeight >>1);
glBegin(GL_QUADS);
if(right>tw && mx)
{
glTexCoord2i ( tw , 0 ); glVertex2i ( tw , 0 );
glTexCoord2i ( tw , bottom ); glVertex2i ( tw , bottom );
glTexCoord2i ( right, bottom ); glVertex2i ( right, bottom );
glTexCoord2i ( right, 0 ); glVertex2i ( right, 0 );
}
if(bottom>th && my)
{
glTexCoord2i ( 0 , th ); glVertex2i ( 0 , th );
glTexCoord2i ( 0 , bottom ); glVertex2i ( 0 , bottom );
glTexCoord2i ( tw , bottom ); glVertex2i ( tw , bottom );
glTexCoord2i ( tw , th ); glVertex2i ( tw , th );
}
glEnd();
glFlush();
}
void GLTexImage::UnbindMultiTex(int n)
{
for(int i = n-1; i>=0; i--)
{
glActiveTexture(GL_TEXTURE0+i);
glBindTexture(_texTarget, 0);
}
}
template <class Uint> int
#if !defined(_MSC_VER) || _MSC_VER > 1200
GLTexInput::
#endif
DownSamplePixelDataI(unsigned int gl_format, int width, int height, int ds,
const Uint * pin, Uint * pout)
{
int step, linestep;
int i, j;
int ws = width/ds;
int hs = height/ds;
const Uint * line = pin, * p;
Uint *po = pout;
switch(gl_format)
{
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
step = ds * (gl_format == GL_LUMINANCE? 1: 2);
linestep = width * step;
for(i = 0 ; i < hs; i++, line+=linestep)
{
for(j = 0, p = line; j < ws; j++, p+=step)
{
*po++ = *p;
}
}
break;
case GL_RGB:
case GL_RGBA:
step = ds * (gl_format == GL_RGB? 3: 4);
linestep = width * step;
for(i = 0 ; i < hs; i++, line+=linestep)
{
for(j = 0, p = line; j < ws; j++, p+=step)
{
//*po++ = int(p[0]*0.299 + p[1] * 0.587 + p[2]* 0.114 + 0.5);
*po++ = ((19595*p[0] + 38470*p[1] + 7471*p[2]+ 32768)>>16);
}
}
break;
case GL_BGR:
case GL_BGRA:
step = ds * (gl_format == GL_BGR? 3: 4);
linestep = width * step;
for(i = 0 ; i < hs; i++, line+=linestep)
{
for(j = 0, p = line; j < ws; j++, p+=step)
{
*po++ = ((7471*p[0] + 38470*p[1] + 19595*p[2]+ 32768)>>16);
}
}
break;
default:
return 0;
}
return 1;
}
template <class Uint> int
#if !defined(_MSC_VER) || _MSC_VER > 1200
GLTexInput::
#endif
DownSamplePixelDataI2F(unsigned int gl_format, int width, int height, int ds,
const Uint * pin, float * pout, int skip)
{
int step, linestep;
int i, j;
int ws = width/ds - skip;
int hs = height/ds;
const Uint * line = pin, * p;
float *po = pout;
const float factor = (sizeof(Uint) == 1? 255.0f : 65535.0f);
switch(gl_format)
{
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
step = ds * (gl_format == GL_LUMINANCE? 1: 2);
linestep = width * step;
for(i = 0 ; i < hs; i++, line+=linestep)
{
for(j = 0, p = line; j < ws; j++, p+=step)
{
*po++ = (*p) / factor;
}
}
break;
case GL_RGB:
case GL_RGBA:
step = ds * (gl_format == GL_RGB? 3: 4);
linestep = width * step;
for(i = 0 ; i < hs; i++, line+=linestep)
{
for(j = 0, p = line; j < ws; j++, p+=step)
{
//*po++ = int(p[0]*0.299 + p[1] * 0.587 + p[2]* 0.114 + 0.5);
*po++ = ((19595*p[0] + 38470*p[1] + 7471*p[2]) / (65535.0f * factor));
}
}
break;
case GL_BGR:
case GL_BGRA:
step = ds * (gl_format == GL_BGR? 3: 4);
linestep = width * step;
for(i = 0 ; i < hs; i++, line+=linestep)
{
for(j = 0, p = line; j < ws; j++, p+=step)
{
*po++ = ((7471*p[0] + 38470*p[1] + 19595*p[2]) / (65535.0f * factor));
}
}
break;
default:
return 0;
}
return 1;
}
int GLTexInput::DownSamplePixelDataF(unsigned int gl_format, int width, int height, int ds, const float * pin, float * pout, int skip)
{
int step, linestep;
int i, j;
int ws = width/ds - skip;
int hs = height/ds;
const float * line = pin, * p;
float *po = pout;
switch(gl_format)
{
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
step = ds * (gl_format == GL_LUMINANCE? 1: 2);
linestep = width * step;
for(i = 0 ; i < hs; i++, line+=linestep)
{
for(j = 0, p = line; j < ws; j++, p+=step)
{
*po++ = *p;
}
}
break;
case GL_RGB:
case GL_RGBA:
step = ds * (gl_format == GL_RGB? 3: 4);
linestep = width * step;
for(i = 0 ; i < hs; i++, line+=linestep)
{
for(j = 0, p = line; j < ws; j++, p+=step)
{
*po++ = (0.299f*p[0] + 0.587f*p[1] + 0.114f*p[2]);
}
}
break;
case GL_BGR:
case GL_BGRA:
step = ds * (gl_format == GL_BGR? 3: 4);
linestep = width * step;
for(i = 0 ; i < hs; i++, line+=linestep)
{
for(j = 0, p = line; j < ws; j++, p+=step)
{
*po++ = (0.114f*p[0] + 0.587f*p[1] + 0.299f * p[2]);
}
}
break;
default:
return 0;
}
return 1;
}
int GLTexInput::SetImageData( int width, int height, const void * data,
unsigned int gl_format, unsigned int gl_type )
{
int simple_format = IsSimpleGlFormat(gl_format, gl_type);//no cpu code to handle other formats
int ws, hs, done = 1;
if(_converted_data)
{
delete [] _converted_data;
_converted_data = NULL;
}
_rgb_converted = 1;
_data_modified = 0;
if( simple_format
&& ( width > _texMaxDim || height > _texMaxDim || GlobalUtil::_PreProcessOnCPU)
&& GlobalUtil::_octave_min_default >0 )
{
_down_sampled = GlobalUtil::_octave_min_default;
ws = width >> GlobalUtil::_octave_min_default;
hs = height >> GlobalUtil::_octave_min_default;
}
else
{
_down_sampled = 0;
ws = width;
hs = height;
}
if ((ws > _texMaxDim) || (hs > _texMaxDim))
{
if(simple_format)
{
#ifdef GPU_HESSIAN
if(GlobalUtil::_AutoImageDownScaling)
{
#endif // GPU_HESSIAN
if(GlobalUtil::_verbose)
std::cout<<"Automatic down-sampling is used\n";
do
{
_down_sampled ++;
ws >>= 1;
hs >>= 1;
} while((ws > _texMaxDim) || (hs > _texMaxDim));
#ifdef GPU_HESSIAN
}
else
{
std::cerr << "\nERROR: Input image is too big to fit into a texture. Try to use -ads option to automatic down-samping of input image to fit max texture dimension." << std::endl;
return 0;
}
#endif // GPU_HESSIAN
}
else
{
std::cerr<<"Input images is too big to fit into a texture\n";
return 0;
}
}
_texWidth = _imgWidth = _drawWidth = ws;
_texHeight = _imgHeight = _drawHeight = hs;
if(GlobalUtil::_verbose)
{
std::cout<<"Image size :\t"<<width<<"x"<<height<<"\n";
if(_down_sampled > 0)
std::cout<<"Down sample to \t"<<ws<<"x"<<hs<<"\n";
}
if(GlobalUtil::_UseCUDA || GlobalUtil::_UseOpenCL)
{
//////////////////////////////////////
int tWidth = TruncateWidthCU(_imgWidth);
int skip = _imgWidth - tWidth;
//skip = 0;