分形几何

开发平台：
Visual C++

BMP.cpp：源码内容
							#include "BMP.h"
BMP::BMP(void)
{
}
BMP::~BMP(void)
{
}
AUX_RGBImageRec *BMP::LoadBMP(char* Filename)
{
	FILE *File=NULL;									// File Handle
	if (!Filename)										// Make Sure A Filename Was Given
	{
		return NULL;									// If Not Return NULL
	}
	File=fopen(Filename,"r");							// Check To See If The File Exists
	if (File)											// Does The File Exist?
	{
		fclose(File);									// Close The Handle
		return auxDIBImageLoad(Filename);				// Load The Bitmap And Return A Pointer
	}
	return NULL;										// If Load Failed Return NULL
}
// Load Bitmaps And Convert To Textures
int BMP::LoadBMPTexture(GLuint *texture,char *Filename)
{
        int Status=FALSE;                               // Status Indicator
        AUX_RGBImageRec *TextureImage[1];               // Create Storage Space For The Texture
        memset(TextureImage,0,sizeof(void *)*1);        // Set The Pointer To NULL
        // Load The Bitmap, Check For Errors, If Bitmap's Not Found Quit
        if (TextureImage[0]=LoadBMP(Filename))
        {
                Status=TRUE;                            // Set The Status To TRUE
 //               glGenTextures(1, &texture[0]);          // Create One Texture
                // Create Linear Filtered Texture
                glBindTexture(GL_TEXTURE_2D, texture[0]);
                glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
                glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
                glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
        }
        if (TextureImage[0])                            // If Texture Exists
        {
                if (TextureImage[0]->data)              // If Texture Image Exists
                {
                        free(TextureImage[0]->data);    // Free The Texture Image Memory
                }
               free(TextureImage[0]);                  // Free The Image Structure
        }
        return Status;                                  // Return The Status
}
bool BMP::MakeAlphaTextureBind(char *TextureFileName, unsigned int *TextureID)
{
	bool status=true;												// Status Indicator
	AUX_RGBImageRec *Image=NULL;									// Create Storage Space For The Texture
	unsigned char *alpha=NULL;
	////////////////////////////////////
	if (Image=LoadBMP(TextureFileName)) 
	{							
		alpha=new unsigned char[4*Image->sizeX*Image->sizeY];		// Create Memory For RGBA8-Texture
		for (int a=0; a<Image->sizeX*Image->sizeY; a++)
		{
			alpha[4*a]=Image->data[a*3];					// R
			alpha[4*a+1]=Image->data[a*3+1];				// G
			alpha[4*a+2]=Image->data[a*3+2];				// B
            ////////////Get max
            if(alpha[4*a+0]+alpha[4*a+1]+alpha[4*a+2] >0)
				alpha[4*a+3] = 255;
			else alpha[4*a+3] = 0;
		}
		///////////////////////////////////////////////			
		glGenTextures(1, TextureID);							// Create One Textures
		// Create Linear Filtered RGBA8-Texture
		glBindTexture(GL_TEXTURE_2D, *TextureID);
   	    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
	    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
	    gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA8, Image->sizeX, Image->sizeY, GL_RGBA, GL_UNSIGNED_BYTE, alpha);
		delete [] alpha;
	}
	else status=false;
	if (Image) {											// If Texture Exists
		if (Image->data) delete Image->data;				// If Texture Image Exists
		delete Image;
		Image=NULL;
	}	
	///////////////////////////////////
    return status;
}

						