openbor Tools

CopyPasta error, should be using PNG_LIBPNG_VER_RELEASE

libpng wrapper functions not need for loadimage. However, we still need the wrapper for png_set_expand_gray_1_2_4_to_8 as it was introduced in libpng 1.2.9 and Dreamcast uses build 1.2.8

further increase loading speed. loading contra takes only 7 seconds now (13 before)

fixed the loading of models loaded from other models

added check for valid filenames, to prevent modders from posting mods that dont work after borpaking because they used special chars in their filenames.

changed some function names, added backtrace when shutdown was called with an error

libpng 1.4.X compatible. With backward compatible wrappers for 1.3.X and lower versions

libpng 1.4.X compatible. With backward compatible wrappers for 1.3.X and lower versions

SDL include is only required for SDL ports

use calloc, the file is big enough already...