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$NetBSD: patch-ad,v 1.5 2008/08/25 15:36:18 joerg Exp $
--- src/cairo-png.c.orig 2008-04-11 23:07:25.000000000 +0200
+++ src/cairo-png.c
@@ -119,6 +119,13 @@ png_simple_warning_callback (png_structp
}
+/* Starting with libpng-1.2.30, we must explicitly specify an output_flush_fn.
+ * Otherwise, we will segfault if we are writing to a stream. */
+static void
+png_simple_output_flush_fn (png_structp png_ptr)
+{
+}
+
static cairo_status_t
write_png (cairo_surface_t *surface,
png_rw_ptr write_func,
@@ -179,7 +186,7 @@ write_png (cairo_surface_t *surface,
goto BAIL3;
#endif
- png_set_write_fn (png, closure, write_func, NULL);
+ png_set_write_fn (png, closure, write_func, png_simple_output_flush_fn);
switch (image->format) {
case CAIRO_FORMAT_ARGB32:
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