dankar / pnglite Goto Github PK

Maybe I did something stupid, but I can't find an obvious error:

#include "pnglite/pnglite.h"
unsigned char IMG_BUFFER[1152000]; // 1152000 = 480 * 800 * 3

int main(int argc, char* argv[]) {
  png_t png;
  png_open_file_read(&png, "white.png");
  png_get_data(&png, IMG_BUFFER);
  return 0;
}

compile: gcc -Wall -g -o minimal minimal.c pnglite/pnglite.c -lz

This leads to a SIGSEGV, valgrind output:

==921== Jump to the invalid address stated on the next line
==921==    at 0x0: ???
==921==    by 0x40258F: png_get_data (pnglite.c:777)
==921==    by 0x400CFC: main (minimal.c:7)
==921==  Address 0x0 is not stack'd, malloc'd or (recently) free'd

Compiler: gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2
Arch: x86_64
Uname -sriv: Linux 3.5.0-37-generic #58-Ubuntu SMP Mon Jul 8 22:07:55 UTC 2013 x86_64