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MaxwellMurder

SDL_LoadBMP and OPENGL

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How do I convert an SDL_LoadBMP into a format that is compatible with opengl so I can texture my model of Optimus Prime dagnammit?? It''s hard kicking ass as a massive Robot when your stuck in wire frame!!!

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This is something I''ve done:

  
GLuint loadTexture(const char *path)
{
SDL_Surface *surface = SDL_LoadBMP(path);
if( !surface ) return 0;
if((surface->format->BytesPerPixel != 3) &&
(surface->format->BytesPerPixel != 4)) return 0;
GLuint texture = 0;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
int retVal = gluBuild2DMipmaps(GL_TEXTURE_2D,
surface->format->BytesPerPixel,
surface->w,
surface->h,
surface->format->BytesPerPixel == 4 ? GL_RGBA : GL_RGB,
GL_UNSIGNED_BYTE,
surface->pixels);

glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );

return texture;
}

The bitmap should hzave 24bit color depth. But you could (easily) rewrite it to handle 8bit images.

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