testtex2dvstexrect.cpp

PDE simulator on GPU.

// TestTex2DvsTexRect.cpp: implementation of the TestTex2DvsTexRect class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "shadow.h"
#include "TestTex2DvsTexRect.h"
#include "extgl.h"
#include "InitOpenGL.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
#define BigTexSize 512
#define MidTexSize 128
#define SmlTexSize 64
unsigned int CompTexID;
bool isLoaded = false;

void LoadTexDataTex2D(unsigned int &TexID)
{
	int DimX,DimY;
	unsigned char *ImageData = ReadTexImage("..\\pine.bmp", &DimX, &DimY );

	glGenTextures(1,&TexID);
	glBindTexture(GL_TEXTURE_2D,TexID);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);	

    //// For max operation in a vector OK!
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
	
	glTexImage2D( GL_TEXTURE_2D, 0, 3, DimX, DimY, 0, GL_RGB, GL_UNSIGNED_BYTE, ImageData );
	
	delete []ImageData;	

	return;
}

void LoadTexRGBA(unsigned int &TexID)
{
	int DimX,DimY;
	unsigned char *ImageData = OpenTexImage4D("..\\AIRDROME2048.bmp", &DimX, &DimY );

	glGenTextures(1,&TexID);
	glBindTexture(GL_TEXTURE_2D,TexID);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);	

    //// For max operation in a vector OK!
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
	
	glTexImage2D( GL_TEXTURE_2D, 0, 4, DimX, DimY, 0, GL_RGBA, GL_UNSIGNED_BYTE, ImageData );
	
	delete []ImageData;	

	return;
}
void LoadTexABGR_EXT(unsigned int &TexID)
{
	int DimX,DimY;
	unsigned char *ImageData = OpenTexImage4D("..\\AIRDROME2048.BMP", &DimX, &DimY );

	glGenTextures(1,&TexID);
	glBindTexture(GL_TEXTURE_2D,TexID);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);	

    //// For max operation in a vector OK!
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
	
	glTexImage2D( GL_TEXTURE_2D, 0, 4, DimX, DimY, 0, GL_ABGR_EXT, GL_UNSIGNED_BYTE, ImageData );
	
	delete []ImageData;	

	return;
}

void LoadTexDataTexRECT(unsigned int &TexID)
{
	int DimX,DimY;
	unsigned char *ImageData = ReadTexImage("..\\pine.BMP", &DimX, &DimY );

	glGenTextures(1,&TexID);
	glBindTexture(GL_TEXTURE_RECTANGLE_NV,TexID);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glTexParameterf(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameterf(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_NEAREST);	

    //// For max operation in a vector OK!
	glTexParameterf(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameterf(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
	
	glTexImage2D( GL_TEXTURE_RECTANGLE_NV, 0, 3, DimX, DimY, 0, GL_RGB, GL_UNSIGNED_BYTE, ImageData );
	
	delete []ImageData;	

	return;
}

void TestTex2D()
{
	int size = BigTexSize;
	if(!isLoaded)
	{
		//LoadTexDataTex2D(CompTexID);

		///The following compare RGBA <---> ABGR_EXT
		LoadTexABGR_EXT(CompTexID);
		//LoadTexRGBA(CompTexID);

		isLoaded = true;
	}

	glEnable(GL_TEXTURE_2D);
	glBindTexture(GL_TEXTURE_2D,CompTexID);
	glBegin( GL_QUADS );
		glTexCoord2f(0, 0);	
		glVertex3d( 0, 0, 0 );

		glTexCoord2f(1, 0);
		glVertex3d( size, 0, 0 );

		glTexCoord2f(1, 1);
		glVertex3d( size, size, 0 );

		glTexCoord2f(0, 1);
		glVertex3d( 0, size, 0 );
	glEnd();
}

void TestTexRect()
{
	int size = BigTexSize;
	if(!isLoaded)
	{
		LoadTexDataTexRECT(CompTexID);
		isLoaded = true;
	}
	
	glEnable(GL_TEXTURE_RECTANGLE_NV);
	glBindTexture(GL_TEXTURE_RECTANGLE_NV,CompTexID);
	glBegin( GL_QUADS );
		glTexCoord2f(0, 0);	
		glVertex3d( 0, 0, 0 );

		glTexCoord2f(size, 0);
		glVertex3d( size, 0, 0 );

		glTexCoord2f(size, size);
		glVertex3d( size, size, 0 );

		glTexCoord2f(0, size);
		glVertex3d( 0, size, 0 );
	glEnd();
}