Quagmire Particle Engine

/*	Ken Mazaika
	February 23, 2005
	Texture Engine
	Copyright 2005
	http://home.comcast.net/~kjmaz
  */

#include "qd.h"
#include <stdio.h>
#include "Texture.h"
#include <GL/glaux.h>
#include <GL/glu.h>
#include <fstream.h>


int QdTexture::SelectTexture()
{
	glBindTexture(GL_TEXTURE_2D, m_nTexture);
	return true;

}
int QdTexture::LoadFromBitmapResource(int nResource)
{
	HBITMAP hBMP;
	BITMAP	BMP;

	hBMP=(HBITMAP)LoadImage(GetModuleHandle(NULL),MAKEINTRESOURCE(nResource), IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION);


		if (hBMP)
		{
			GetObject(hBMP,sizeof(BMP), &BMP);
			glGenTextures(1, &m_nTexture);
			glBindTexture(GL_TEXTURE_2D, m_nTexture);
			gluBuild2DMipmaps(GL_TEXTURE_2D, 3, BMP.bmWidth, BMP.bmHeight, GL_BGR_EXT, GL_UNSIGNED_BYTE, BMP.bmBits);

			glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
			glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);

			//Automatically generate texture coordinates if desired
			if(m_bAutoTexture)
			{
				glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
				glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
				glEnable(GL_TEXTURE_GEN_S);
				glEnable(GL_TEXTURE_GEN_T);
			}

			DeleteObject(hBMP);
			return QD_SUCCESS;
		}
		else
		{
			
			return QD_INVALID_RESOURCE;
		}
	}


int QdTexture::LoadFromBitmap(char *szPath)
{
    FILE *fp;
    int nMemory;
	QD_BITMAP_IMAGE pbiTexture;

    fp = fopen(szPath, "rb");
    fread(&pbiTexture.bmfHeader, 1, 14, fp);
    fread(&pbiTexture.bmiHeader, 1, 40, fp);  

    if (pbiTexture.bmiHeader.biSizeImage == 0)
    {
        nMemory = pbiTexture.bmiHeader.biWidth * pbiTexture.bmiHeader.biHeight * 4;
    }
    else
    {
       nMemory = pbiTexture.bmiHeader.biSizeImage;
    }
   
    pbiTexture.image_data= new GLubyte[nMemory];

    fread(pbiTexture.image_data , 1, nMemory, fp);
    fclose(fp);

	glPixelStorei(GL_UNPACK_ALIGNMENT,1);
	glGenTextures(1, &m_nTexture);

	glBindTexture(GL_TEXTURE_2D, m_nTexture);
	gluBuild2DMipmaps(GL_TEXTURE_2D, 3, pbiTexture.bmiHeader.biWidth, pbiTexture.bmiHeader.biHeight, GL_BGR_EXT, GL_UNSIGNED_BYTE, pbiTexture.image_data);

	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);

	//Automatically generate texture coordinates if desired
	if(m_bAutoTexture)
	{
		glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
		glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
	
		glEnable(GL_TEXTURE_GEN_S);
		glEnable(GL_TEXTURE_GEN_T);
	}
	delete[] pbiTexture.image_data;
   return true;


}


QdTexture::QdTexture()
{
	m_bAutoTexture = 1;  //Set to autotexture by default
}

QdTexture::~QdTexture()
{

}

int QdTexture::SetMode(int nMode)
{
	if(nMode == QD_NO_AUTO_TEXTURE)
	{
		m_bAutoTexture = 0;
	}
	else if(nMode == QD_AUTO_TEXURE)
	{
		m_bAutoTexture = 1;
	}
	return QD_SUCCESS;
}