Doomsday Engine

The PNG_Load() function accesses members of png_info directly (png_info->bit_depth etc.). The libpng guys would rather people not do this. These members are marked as deprecated in the current version, and have already been privatized in the dev version.
http://libpng.sourceforge.net/index.html

I've made an edited version that uses the appropriate png_gets. What do you think?

Summary:
declare additional variables
png_uint_32 twidth, theight, retpal;
int bit_depth, color_type, num_palette;
png_byte channels;
png_colorp palette;
call png_get*
png_get_IHDR(png_ptr, png_info, &twidth, &theight, &bit_depth,
&color_type, NULL, NULL, NULL);

channels    = png_get_channels(png_ptr, png_info);
                    retpal      = png_get_PLTE(png_ptr, png_info, &palette, 
                                                &num_palette);
replace:
    png_info->width with 'twidth'
    png_info->height with 'theight'
    all other png_info->* with * (ie png_info->bit_depth with bit_depth)

Labels: OpenGL Renderer