使用libpng帮助将位图转换为内存中的png

Question

基本上我想使用libpng将位图转换为png,而不是将其输出到FILE*我想将它输出到char*.我已经看过这个相关的帖子,但我没看到实际使用位图数据的位置.任何帮助,将不胜感激.

Answer 1

Use the png_set_write_fn function to redirect writes to your own function; this function, which you need to write, can store the output in any way you want.

See the documentation at http://www.libpng.org/pub/png/libpng-manual.txt