X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftrunk%2Fsrc%2Fsynfig%2Ftarget_scanline.cpp;h=b4745fed127eb3dd7ae9d827aac12812254d4764;hb=ca157a87151421913925eaef67fdd402bbdc8c8f;hp=e8ea05bd6923dbd7ba161e8bd1d69d06f69cb3f8;hpb=756c0d29ac1742f231e6615f9a577e574e35a4af;p=synfig.git

diff --git a/synfig-core/trunk/src/synfig/target_scanline.cpp b/synfig-core/trunk/src/synfig/target_scanline.cpp
index e8ea05b..b4745fe 100644
--- a/synfig-core/trunk/src/synfig/target_scanline.cpp
+++ b/synfig-core/trunk/src/synfig/target_scanline.cpp
@@ -47,7 +47,13 @@ using namespace synfig;
 
 /* === M A C R O S ========================================================= */
 
-#define SYNFIG_OPTIMIZE_LAYER_TREE 1
+// note that if this isn't defined then the rendering is incorrect for
+// the straight blend method since the optimize_layers() function in
+// canvas.cpp which makes the straight blend method work correctly
+// isn't called.  ie. leave this defined.  to see the problem, draw a
+// small circle over a solid background.  set circle to amount 0.99
+// and blend method 'straight'.  the background should vanish but doesn't
+#define SYNFIG_OPTIMIZE_LAYER_TREE
 
 #define PIXEL_RENDERING_LIMIT 1500000
 
@@ -172,14 +178,20 @@ synfig::Target_Scanline::render(ProgressCallback *cb)
 
 		Context context;
 
-		#ifdef SYNFIG_OPTIMIZE_LAYER_TREE
-		Canvas::Handle op_canvas(Canvas::create());
-		op_canvas->set_file_name(canvas->get_file_name());
-		optimize_layers(canvas->get_time(), canvas->get_context(), op_canvas);
-		context=op_canvas->get_context();
-		#else
+#ifdef SYNFIG_OPTIMIZE_LAYER_TREE
+		Canvas::Handle op_canvas;
+		if (!getenv("SYNFIG_DISABLE_OPTIMIZE_LAYER_TREE"))
+		{
+			op_canvas = Canvas::create();
+			op_canvas->set_file_name(canvas->get_file_name());
+			optimize_layers(canvas->get_time(), canvas->get_context(), op_canvas);
+			context=op_canvas->get_context();
+		}
+		else
+			context=canvas->get_context();
+#else
 		context=canvas->get_context();
-		#endif
+#endif
 
 		// If the quality is set to zero, then we
 		// use the parametric scanline-renderer.
@@ -307,14 +319,20 @@ synfig::Target_Scanline::render(ProgressCallback *cb)
 			canvas->set_time(t);
 		Context context;
 
-		#ifdef SYNFIG_OPTIMIZE_LAYER_TREE
-		Canvas::Handle op_canvas(Canvas::create());
-		op_canvas->set_file_name(canvas->get_file_name());
-		optimize_layers(canvas->get_time(), canvas->get_context(), op_canvas);
-		context=op_canvas->get_context();
-		#else
+#ifdef SYNFIG_OPTIMIZE_LAYER_TREE
+		Canvas::Handle op_canvas;
+		if (!getenv("SYNFIG_DISABLE_OPTIMIZE_LAYER_TREE"))
+		{
+			op_canvas = Canvas::create();
+			op_canvas->set_file_name(canvas->get_file_name());
+			optimize_layers(canvas->get_time(), canvas->get_context(), op_canvas);
+			context=op_canvas->get_context();
+		}
+		else
+			context=canvas->get_context();
+#else
 		context=canvas->get_context();
-		#endif
+#endif
 
 		// If the quality is set to zero, then we
 		// use the parametric scanline-renderer.