convert_color_format(buffer, color_buffer, desc.get_w(), PF_RGB, gamma());
if(!fwrite(buffer,1,desc.get_w()*3,file))
return false;
convert_color_format(buffer, color_buffer, desc.get_w(), PF_RGB, gamma());
if(!fwrite(buffer,1,desc.get_w()*3,file))
return false;