rest of image-test case

tests/image_test.c

@@ -0,0 +1,15 @@
+#define STB_IMAGE_WRITE_IMPLEMENTATION
+#include "stb_image_write.h"
+
+#define STBI_HEADER_FILE_ONLY
+#include "stb_image.c"
+
+
+int main(int argc, char **argv)
+{
+   int w,h;
+   unsigned char *data = stbi_load(argv[1], &w, &h, 0, 4);
+   if (data)
+      stbi_write_png("c:/x/result.png", w, h, 4, data, w*4);
+   return 0;
+}