www.pudn.com > openglbk.rar > readImage.c

 
#include  
#include  
#include  
 
GLubyte* 
readImage( const char* filename, GLsizei* width, GLsizei *height ) 
{ 
    int       n; 
    GLubyte*  pixels; 
 
    FILE* infile = fopen( filename, "rb" ); 
 
    if ( !infile ) { 
	fprintf( stderr, "Unable to open file '%s'\n", filename ); 
	return NULL; 
    } 
 
    fread( width, sizeof( GLsizei ), 1, infile ); 
    fread( height, sizeof( GLsizei ), 1, infile ); 
 
    n = 3 * (*width) * (*height); 
 
    pixels = (GLubyte *) malloc( n * sizeof( GLubyte )); 
    if ( !pixels ) { 
	fprintf( stderr, "Unable to malloc() bytes for pixels\n" ); 
	return NULL; 
    } 
 
    fread( pixels, sizeof( GLubyte ), n, infile ); 
     
    fclose( infile ); 
 
    return pixels; 
}