main: open file once, in main, and log an error when we fail

1 files changed, 2 insertions, 1 deletions

diff --git a/png-wbg.h b/png-wbg.h
index bf15f9d..71e7dac 100644
--- a/png-wbg.h
+++ b/png-wbg.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <stdio.h>
 #include <pixman.h>
 
-pixman_image_t *png_load(const char *path);
+pixman_image_t *png_load(FILE *fp, const char *path);