[trace] Disable mark dirty tracing.

Applications like firefox have a very conservative approach and mark
surfaces dirty before every render. As we record the image data every
time, firefox traces can grow very large with redundant data - so allow
the user to disable mark dirty tracing.

2 files changed, 35 insertions, 11 deletions

diff --git a/util/cairo-trace/cairo-trace.in b/util/cairo-trace/cairo-trace.in
index 40c9d193..6660ff80 100644
--- a/util/cairo-trace/cairo-trace.in
+++ b/util/cairo-trace/cairo-trace.in
@@ -6,6 +6,7 @@ exec_prefix=@exec_prefix@
 nofile=
 flush=
 nocallers=
+nomarkdirty=
 
 usage() {
 cat << EOF
@@ -14,10 +15,11 @@ cairo-trace will generate a log of all calls made by command to
 cairo. This log will be stored in a file in the local directory
 called command.pid.trace.
 Whatever else happens is driven by its argument:
-  --flush      - Flush the output trace after every call.
-  --no-file    - Disable the creation of an output file. Outputs to the
-                 terminal instead.
-  --no-callers - Do not lookup the caller address/symbol/line whilst tracing.
+  --flush         - Flush the output trace after every call.
+  --no-file       - Disable the creation of an output file. Outputs to the
+                    terminal instead.
+  --no-callers    - Do not lookup the caller address/symbol/line whilst tracing.
+  --no-mark-dirty - Do not record image data for cairo_mark_dirty()
 
 Enviroment variables understood by cairo-trace:
   CAIRO_TRACE_FLUSH - flush the output after every function call.
@@ -42,6 +44,10 @@ while test $skip -eq 1; do
 	skip=1
 	nocallers=1
 	;;
+    --no-mark-dirty)
+	skip=1
+	nomarkdirty=1
+	;;
     --version)
 	echo "cairo-trace, version @CAIRO_VERSION_MAJOR@.@CAIRO_VERSION_MINOR@.@CAIRO_VERSION_MICRO@."
 	exit
@@ -69,6 +75,11 @@ if test -n "$nocallers"; then
     export CAIRO_TRACE_LINE_INFO
 fi
 
+if test -n "$nomarkdirty"; then
+    CAIRO_TRACE_MARK_DIRTY=0
+    export CAIRO_TRACE_MARK_DIRTY
+fi
+
 if test -n "$flush"; then
     CAIRO_TRACE_FLUSH=1
     export CAIRO_TRACE_FLUSH
diff --git a/util/cairo-trace/trace.c b/util/cairo-trace/trace.c
index 029a7200..4a7096db 100644
--- a/util/cairo-trace/trace.c
+++ b/util/cairo-trace/trace.c
@@ -166,6 +166,7 @@ static FILE *logfile;
 static bool _flush;
 static bool _error;
 static bool _line_info;
+static bool _mark_dirty;
 static const cairo_user_data_key_t destroy_key;
 
 #if __GNUC__ >= 3
@@ -692,6 +693,11 @@ _init_logfile (void)
     if (env != NULL)
 	_line_info = atoi (env);
 
+    _mark_dirty = true;
+    env = getenv ("CAIRO_TRACE_MARK_DIRTY");
+    if (env != NULL)
+	_mark_dirty = atoi (env);
+
     filename = getenv ("CAIRO_TRACE_FD");
     if (filename != NULL) {
 	int fd = atoi (filename);
@@ -3115,9 +3121,12 @@ cairo_surface_mark_dirty (cairo_surface_t *surface)
 {
     _emit_line_info ();
     if (surface != NULL && _write_lock ()) {
-	_emit_surface (surface);
-	_trace_printf ("%% mark-dirty\n");
-	_emit_source_image (surface);
+	if (_mark_dirty) {
+	    _emit_surface (surface);
+	    _trace_printf ("%% mark-dirty\n");
+	    _emit_source_image (surface);
+	} else
+	    _trace_printf ("%% s%ld mark-dirty\n", _get_surface_id (surface));
 	_write_unlock ();
     }
 
@@ -3130,10 +3139,14 @@ cairo_surface_mark_dirty_rectangle (cairo_surface_t *surface,
 {
     _emit_line_info ();
     if (surface != NULL && _write_lock ()) {
-	_emit_surface (surface);
-	_trace_printf ("%% %d %d %d %d mark-dirty-rectangle\n",
-		 x, y, width, height);
-	_emit_source_image_rectangle (surface, x,y, width, height);
+	if (_mark_dirty) {
+	    _emit_surface (surface);
+	    _trace_printf ("%% %d %d %d %d mark-dirty-rectangle\n",
+		            x, y, width, height);
+	    _emit_source_image_rectangle (surface, x,y, width, height);
+	} else
+	    _trace_printf ("%% s%ld %d %d %d %d mark-dirty-rectangle\n",
+		           _get_surface_id (surface), x, y, width, height);
 	_write_unlock ();
     }