bitmap loader code by mrglass

1

GLuint tex; void bmp(void){      glGenTextures(1, &tex);      loadBitmap('wood1.bmp', tex);      } /* Bitmap loading code from http://www.glprogramming.com/dgs.php?dg=9 */ // This function loads a .bmp file and puts it in the GLuint specified bool loadBitmap(const char *filename, GLuint tex) {     FILE *fp = fopen(filename, "r");     if(!fp)     {     cout << "Could not open the file." << endl;     return false;     }     unsigned short uint;     unsigned int dword;     unsigned short word;     long llong;     // read some data we don't need     fread(&uint, sizeof(uint), 1, fp);     fread(&dword, sizeof(dword), 1, fp);     fread(&uint, sizeof(uint), 1, fp);     fread(&uint, sizeof(uint), 1, fp);     fread(&dword, sizeof(dword), 1, fp);     fread(&dword, sizeof(dword), 1, fp);     long width, height;     fread(&width, sizeof(long), 1, fp);     fread(&height, sizeof(long), 1, fp);     fread(&word, sizeof(word), 1, fp);     unsigned short bitcount;     fread(&bitcount, sizeof(unsigned short), 1, fp);     if(bitcount != 24)     {     cout << "invalid bitcount. Make a 24bit image." << endl;     return false;     }     unsigned long compression;     fread(&compression, sizeof(unsigned long), 1, fp);     if(compression != 0)     {     cout << "invalid compression. Make sure the BMP is not using RLE." << endl;     return false;     }     fread(&dword, sizeof(dword), 1, fp);     fread(&llong, sizeof(long), 1, fp);     fread(&llong, sizeof(long), 1, fp);     fread(&dword, sizeof(dword), 1, fp);     fread(&dword, sizeof(dword), 1, fp);     unsigned char *imagedata;     imagedata = new unsigned char[width * height * 4];     for(int x=0; x < width; x++)     {     for(int y=0; y < height; y++)     {         fread(&imagedata[(x * height + y)*4+0], sizeof(char), 1, fp);         fread(&imagedata[(x * height + y)*4+1], sizeof(char), 1, fp);         fread(&imagedata[(x * height + y)*4+2], sizeof(char), 1, fp);         int r = imagedata[(x * height + y)*4+2];         int b = imagedata[(x * height + y)*4+0];         imagedata[(x * height + y)*4+0] = r;         imagedata[(x * height + y)*4+2] = b;         if(imagedata[(x * height + y)*4+0] == 255 &&             imagedata[(x * height + y)*4+1] == 0 &&            imagedata[(x * height + y)*4+2] == 255)         imagedata[(x * height + y)*4+3] = 0;         else         imagedata[(x * height + y)*4+3] = 255;              }     }     // create your texture here     delete[] imagedata;     return true; } /* End bitmap loading code */