remove debug output and get logic correct to cause first render to always use the...

[ardour.git] / libs / canvas / canvas.cc

diff --git a/libs/canvas/canvas.cc b/libs/canvas/canvas.cc
index 72acbd402166579f18bf276ffd8eeb9cabf3bddc..7f9c8fab597337ca08f71b7bbeb45cae266ee673 100644 (file)
--- a/libs/canvas/canvas.cc
+++ b/libs/canvas/canvas.cc
@@ -18,6 +18,10 @@
 
 */
 
+#if !defined USE_CAIRO_IMAGE_SURFACE && !defined NDEBUG
+#define OPTIONAL_CAIRO_IMAGE_SURFACE
+#endif
+
 /** @file  canvas/canvas.cc
  *  @brief Implementation of the main canvas classes.
  */
@@ -754,12 +758,18 @@ void
 GtkCanvas::on_size_allocate (Gtk::Allocation& a)
 {
        EventBox::on_size_allocate (a);
-#ifdef USE_CAIRO_IMAGE_SURFACE
+#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE
+       if (getenv("ARDOUR_IMAGE_SURFACE")) {
+#endif
+#if defined USE_CAIRO_IMAGE_SURFACE || defined OPTIONAL_CAIRO_IMAGE_SURFACE
        /* allocate an image surface as large as the canvas itself */
 
        canvas_image.clear ();
        canvas_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, a.get_width(), a.get_height());
 #endif
+#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE
+       }
+#endif
 }
 
 /** Handler for GDK expose events.
@@ -769,7 +779,19 @@ GtkCanvas::on_size_allocate (Gtk::Allocation& a)
 bool
 GtkCanvas::on_expose_event (GdkEventExpose* ev)
 {
-#ifdef USE_CAIRO_IMAGE_SURFACE
+#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE
+       Cairo::RefPtr<Cairo::Context> draw_context;
+       Cairo::RefPtr<Cairo::Context> window_context;
+       if (getenv("ARDOUR_IMAGE_SURFACE")) {
+               if (!canvas_image) {
+                       canvas_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, get_width(), get_height());
+               }
+               draw_context = Cairo::Context::create (canvas_image);
+               window_context = get_window()->create_cairo_context ();
+       } else {
+               draw_context = get_window()->create_cairo_context ();
+       }
+#elif defined USE_CAIRO_IMAGE_SURFACE
        if (!canvas_image) {
                canvas_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, get_width(), get_height());
        }
@@ -803,7 +825,10 @@ GtkCanvas::on_expose_event (GdkEventExpose* ev)
                        g_free (rects);
                }
                
-#ifdef USE_CAIRO_IMAGE_SURFACE
+#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE
+       if (getenv("ARDOUR_IMAGE_SURFACE")) {
+#endif
+#if defined USE_CAIRO_IMAGE_SURFACE || defined OPTIONAL_CAIRO_IMAGE_SURFACE
        /* now blit our private surface back to the GDK one */
 
        window_context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
@@ -812,6 +837,9 @@ GtkCanvas::on_expose_event (GdkEventExpose* ev)
        window_context->set_operator (Cairo::OPERATOR_SOURCE);
        window_context->paint ();
 #endif
+#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE
+       }
+#endif
 
        return true;
 }