1 files changed, 79 insertions, 0 deletions
diff --git a/gfx/layers/RenderTrace.cpp b/gfx/layers/RenderTrace.cpp
new file mode 100644
index 0000000000..a2897a675e
--- /dev/null
+++ b/gfx/layers/RenderTrace.cpp
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "RenderTrace.h"
+
+// If rendertrace is off let's no compile this code
+#ifdef MOZ_RENDERTRACE
+#  include "Layers.h"
+#  include "TreeTraversal.h"  // for ForEachNode
+
+namespace mozilla {
+namespace layers {
+
+static gfx::Matrix4x4 GetRootTransform(Layer* aLayer) {
+  gfx::Matrix4x4 layerTrans = aLayer->GetTransform();
+  layerTrans.ProjectTo2D();
+  if (aLayer->GetParent() != nullptr) {
+    return GetRootTransform(aLayer->GetParent()) * layerTrans;
+  }
+  return layerTrans;
+}
+
+void RenderTraceLayers(Layer* aLayer, const char* aColor,
+                       const gfx::Matrix4x4 aRootTransform) {
+  int colorId = 0;
+  ForEachNode<ForwardIterator>(aLayer, [&colorId](Layer* layer) {
+    gfx::Matrix4x4 trans = aRootTransform * layer->GetTransform();
+    trans.ProjectTo2D();
+    gfx::IntRect clipRect = layer->GetLocalVisibleRegion().GetBounds();
+    Rect rect(clipRect.x, clipRect.y, clipRect.width, clipRect.height);
+    trans.TransformBounds(rect);
+
+    if (strcmp(layer->Name(), "ContainerLayer") != 0 &&
+        strcmp(layer->Name(), "ContainerLayerComposite") != 0) {
+      printf_stderr("%s RENDERTRACE %u rect #%02X%s %i %i %i %i\n",
+                    layer->Name(), (int)PR_IntervalNow(), colorId, aColor,
+                    (int)rect.x, (int)rect.y, (int)rect.width,
+                    (int)rect.height);
+    }
+    colorId++;
+  });
+}
+
+void RenderTraceInvalidateStart(Layer* aLayer, const char* aColor,
+                                const gfx::IntRect aRect) {
+  gfx::Matrix4x4 trans = GetRootTransform(aLayer);
+  gfx::Rect rect(aRect.x, aRect.y, aRect.width, aRect.height);
+  trans.TransformBounds(rect);
+
+  printf_stderr("%s RENDERTRACE %u fillrect #%s %i %i %i %i\n", aLayer->Name(),
+                (int)PR_IntervalNow(), aColor, (int)rect.x, (int)rect.y,
+                (int)rect.width, (int)rect.height);
+}
+void RenderTraceInvalidateEnd(Layer* aLayer, const char* aColor) {
+  // Clear with an empty rect
+  RenderTraceInvalidateStart(aLayer, aColor, gfx::IntRect());
+}
+
+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);
+}
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif