Improve RenderTrace. r=debug

--HG--
extra : rebase_source : a01b6e678bca01848fe124b839c0e5433866fa58

gfx/layers/RenderTrace.cpp

@@ -97,6 +97,20 @@ void RenderTraceInvalidateEnd(Layer *aLayer, const char *aColor) {
   RenderTraceInvalidateStart(aLayer, aColor, nsIntRect());
 }
 
+void renderTraceEventStart(const char *aComment, const char *aColor) {
+  printf_stderr("%s RENDERTRACE %u fillrect #%s 0 0 10 10\n",
+    aComment, (int)PR_IntervalNow(), aColor);
+}
+
+void renderTraceEventEnd(const char *aComment, const char *aColor) {
+  printf_stderr("%s RENDERTRACE %u fillrect #%s 0 0 0 0\n",
+    aComment, (int)PR_IntervalNow(), aColor);
+}
+
+void renderTraceEventEnd(const char *aColor) {
+  renderTraceEventEnd("", aColor);
+}
+
 }
 }
 

gfx/layers/RenderTrace.h

@@ -42,10 +42,10 @@
 // For the front end see: https://github.com/staktrace/rendertrace
 
 // Uncomment this line to enable RENDERTRACE
-#define MOZ_RENDERTRACE
+//#define MOZ_RENDERTRACE
 
 #ifndef GFX_RENDERTRACE_H
-//#define GFX_RENDERTRACE_H
+#define GFX_RENDERTRACE_H
 
 #include "gfx3DMatrix.h"
 #include "nsRect.h"
@@ -60,6 +60,10 @@ void RenderTraceLayers(Layer *aLayer, const char *aColor, const gfx3DMatrix aRoo
 void RenderTraceInvalidateStart(Layer *aLayer, const char *aColor, const nsIntRect aRect);
 void RenderTraceInvalidateEnd(Layer *aLayer, const char *aColor);
 
+void renderTraceEventStart(const char *aComment, const char *aColor);
+void renderTraceEventEnd(const char *aComment, const char *aColor);
+void renderTraceEventEnd(const char *aColor);
+
 #ifndef MOZ_RENDERTRACE
 inline void RenderTraceLayers(Layer *aLayer, const char *aColor, const gfx3DMatrix aRootTransform, bool aReset)
 {}
@@ -70,6 +74,15 @@ inline void RenderTraceInvalidateStart(Layer *aLayer, const char *aColor, const
 inline void RenderTraceInvalidateEnd(Layer *aLayer, const char *aColor)
 {}
 
+inline void renderTraceEventStart(const char *aComment, const char *aColor)
+{}
+
+inline void renderTraceEventEnd(const char *aComment, const char *aColor)
+{}
+
+inline void renderTraceEventEnd(const char *aColor)
+{}
+
 #endif // MOZ_RENDERTRACE
 
 }