cc: Add frame data to LTHI tracing

cc/quads/render_pass.cc

Index: cc/quads/render_pass.cc
diff --git a/cc/quads/render_pass.cc b/cc/quads/render_pass.cc
index ef6308cff2c997920073a52f2e43faf02e1a3c34..e5f4c5cccecdee87883cb6033f46698d4caa2cd2 100644
--- a/cc/quads/render_pass.cc
+++ b/cc/quads/render_pass.cc
@@ -4,12 +4,19 @@
 
 #include "cc/quads/render_pass.h"
 
+#include "base/values.h"
+#include "cc/base/math_util.h"
+#include "cc/debug/traced_value.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/quads/shared_quad_state.h"
 
 namespace cc {
 
+void* RenderPass::Id::AsTracingId() const {
+  return reinterpret_cast<void*>(base::HashPair(layer_id, index));

[danakj, 2013/08/06 19:30:34]

can sizeof(size_t) be > sizeof(void*) ?

[piman, 2013/08/06 23:31:11]

In theory, yes.
In practice, size_t has to be the same size as ptrdiff_t (though unsigned), and
in our flat address spaces, that's effectively the size of a pointer.
I added a COMPILE_ASSERT.

+}
+
 scoped_ptr<RenderPass> RenderPass::Create() {
   return make_scoped_ptr(new RenderPass);
 }
@@ -19,7 +26,18 @@ RenderPass::RenderPass()
       has_transparent_background(true),
       has_occlusion_from_outside_target_surface(false) {}
 
-RenderPass::~RenderPass() {}
+RenderPass::~RenderPass() {
+  // Snapshot was created in cc.debug category, but only if cc.debug.quads is on
+  // as well.
+  bool enabled;
+  TRACE_EVENT_CATEGORY_GROUP_ENABLED(
+      TRACE_DISABLED_BY_DEFAULT("cc.debug.quads"), &enabled);
+  if (enabled) {
+    TRACE_EVENT_OBJECT_DELETED_WITH_ID(TRACE_DISABLED_BY_DEFAULT("cc.debug"),
+                                       "cc::RenderPass",
+                                       id.AsTracingId());
+  }
+}
 
 scoped_ptr<RenderPass> RenderPass::Copy(Id new_id) const {
   scoped_ptr<RenderPass> copy_pass(Create());
@@ -69,4 +87,28 @@ void RenderPass::SetAll(Id id,
   DCHECK(shared_quad_state_list.empty());
 }
 
+scoped_ptr<base::Value> RenderPass::AsValue() const {
+  scoped_ptr<base::DictionaryValue> value(new base::DictionaryValue());
+  value->Set("output_rect", MathUtil::AsValue(output_rect).release());
+  value->Set("damage_rect", MathUtil::AsValue(damage_rect).release());
+  value->SetBoolean("has_transparent_background", has_transparent_background);
+  value->SetBoolean("has_occlusion_from_outside_target_surface",
+                    has_occlusion_from_outside_target_surface);
+  value->SetInteger("copy_requests", copy_requests.size());
+  scoped_ptr<base::ListValue> shared_states_value(new base::ListValue());
+  for (size_t i = 0; i < shared_quad_state_list.size(); ++i) {
+    shared_states_value->Append(shared_quad_state_list[i]->AsValue().release());
+  }
+  value->Set("shared_quad_state_list", shared_states_value.release());
+  scoped_ptr<base::ListValue> quad_list_value(new base::ListValue());
+  for (size_t i = 0; i < quad_list.size(); ++i) {
+    quad_list_value->Append(quad_list[i]->AsValue().release());
+  }
+  value->Set("quad_list", quad_list_value.release());
+
+  TracedValue::MakeDictIntoImplicitSnapshot(
+      value.get(), "cc::RenderPass", id.AsTracingId());
+  return value.PassAs<base::Value>();
+}
+
 }  // namespace cc