File qemacs-libpng.patch of Package qemacs

--- html2png.c
+++ html2png.c
@@ -186,13 +186,11 @@
 }
 
 #ifdef CONFIG_PNG_OUTPUT
-extern void png_write_init();
-
 int png_save(QEditScreen *s, const char *filename)
 {
     CFBContext *cfb = s->private;
-    png_struct * volatile png_ptr = NULL;
-    png_info * volatile info_ptr = NULL;
+    png_structp png_ptr = NULL;
+    png_infop info_ptr = NULL;
     png_byte *row_ptr, *row_pointers[1], *row = NULL;
     int w, h, x, y;
     unsigned int r, g, b, v;
@@ -202,32 +200,30 @@
     row = malloc(3 * s->width);
     if (!row)
         goto fail;
-    png_ptr = malloc(sizeof (png_struct));
+    png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
     if (!png_ptr)
         goto fail;
-    info_ptr = malloc(sizeof (png_info));
-    if (!info_ptr)
+    info_ptr = png_create_info_struct (png_ptr);
+    if (!info_ptr) {
+	png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
         goto fail;
+    }
     
     f = fopen(filename, "w");
     if (!f) 
         goto fail;
 
     if (setjmp(png_ptr->jmpbuf)) {
-        png_write_destroy(png_ptr);
+        png_destroy_write_struct(&png_ptr, &info_ptr);
     fail:
         /* free pointers before returning.  Make sure you clean up
            anything else you've done. */
-        free(png_ptr);
-        free(info_ptr);
         free(row);
         if (f)
             fclose(f);
         return -1;
     }
 
-    png_info_init(info_ptr);
-    png_write_init(png_ptr);
     png_init_io(png_ptr, f);
     
     data = (unsigned int *)cfb->base;
@@ -259,10 +255,9 @@
         data = (void *)((char *)data + cfb->wrap);
     }
     png_write_end(png_ptr, info_ptr);
-    png_write_destroy(png_ptr);
-
-    free(png_ptr);
-    free(info_ptr);
+    png_destroy_write_struct (&png_ptr, &info_ptr);
+    
+   
     free(row);
     fclose(f);
     return 0;