From 55eddb7ef4b6b561d6692a6f074834d5d5fb94fa Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 11 Aug 2009 23:40:04 +0100
Subject: [PATCH] [script] A little utility to convert a trace into a trace

Replay the trace using the interpreter onto a script surface - useful for
checking idempotency.
---
 util/cairo-script/Makefile.am |  6 ++++++
 util/cairo-script/csi-trace.c | 40 +++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 util/cairo-script/csi-trace.c

diff --git a/util/cairo-script/Makefile.am b/util/cairo-script/Makefile.am
index acde8f594..8b783a9ad 100644
--- a/util/cairo-script/Makefile.am
+++ b/util/cairo-script/Makefile.am
@@ -28,5 +28,11 @@ csi_replay_LDADD = libcairo-script-interpreter.la $(top_builddir)/src/libcairo.l
 csi_exec_SOURCES = csi-exec.c
 csi_exec_LDADD = libcairo-script-interpreter.la $(top_builddir)/src/libcairo.la $(CAIRO_LIBS)
 
+if CAIRO_HAS_SCRIPT_SURFACE
+EXTRA_PROGRAMS += csi-trace
+csi_trace_SOURCES = csi-trace.c
+csi_trace_LDADD = libcairo-script-interpreter.la $(top_builddir)/src/libcairo.la $(CAIRO_LIBS)
+endif
+
 EXTRA_DIST = \
 	COPYING
diff --git a/util/cairo-script/csi-trace.c b/util/cairo-script/csi-trace.c
new file mode 100644
index 000000000..418a3353f
--- /dev/null
+++ b/util/cairo-script/csi-trace.c
@@ -0,0 +1,40 @@
+#include <cairo-script.h>
+#include <cairo-script-interpreter.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <libgen.h>
+
+static cairo_surface_t *
+_similar_surface_create (void *closure,
+			 cairo_content_t content,
+			 double width, double height)
+{
+    return cairo_surface_create_similar (closure, content, width, height);
+}
+
+int
+main (int argc, char **argv)
+{
+    cairo_script_interpreter_t *csi;
+    cairo_script_interpreter_hooks_t hooks = {
+	.surface_create = _similar_surface_create,
+    };
+    int i;
+
+    csi = cairo_script_interpreter_create ();
+
+    for (i = 1; i < argc; i++) {
+	char buf[4096];
+
+	snprintf (buf, sizeof (buf), "%s.trace", basename (argv[i]));
+
+	cairo_surface_destroy (hooks.closure);
+	hooks.closure = cairo_script_surface_create (buf, -1, -1);
+	cairo_script_interpreter_install_hooks (csi, &hooks);
+	cairo_script_interpreter_run (csi, argv[i]);
+    }
+    cairo_surface_destroy (hooks.closure);
+
+    return cairo_script_interpreter_destroy (csi);
+}