Added support for O3D in Chrome on Mac OS X using CoreGraphics drawing

model by rendering offscreen, reading back the frame buffer, and
drawing the rendering results into the CGContextRef.

This code path is currently Chrome-specific, but could be used for any
browser with similar characteristics. This will require refactoring of
the drawing and event model selection code, which may be done in a
subsequent bug.

Changed the RenderSurface APIs to allow the Bitmap for readback to be
passed in. Added Client::SetOffscreenRenderingSurfaces so that the
entry point Client::RenderClient() can be used unchanged.

Fixed problem with plugin_enable_fullscreen_msg gyp variable which
needs to be in top-level gypi so #define is consistent throughout
project. Fixed minor issue in Cocoa key event handling. Fixed log
message causing crashes when render target attachment fails.

Chrome currently blacklists the O3D plugin's MIME type, so to enable
support for O3D this blacklist entry needs to be removed from Chrome.

Ran nearly all O3D samples in Chrome on Mac OS X. There are a couple
of failures which will be fixed in subsequent bugs. Also ran samples
in Safari and Firefox on Mac and verified no performance regressions.

BUG=http://code.google.com/p/o3d/issues/detail?id=215
TEST=ran O3D samples in Chrome, Safari and Firefox

Review URL: http://codereview.chromium.org/669220

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@41233 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 26 insertions, 1 deletions

diff --git a/o3d/core/cross/client.cc b/o3d/core/cross/client.cc
index a7f5924..c63c940 100644
--- a/o3d/core/cross/client.cc
+++ b/o3d/core/cross/client.cc
@@ -304,7 +304,25 @@ void Client::RenderClient(bool send_callback) {
   if (!renderer_.IsAvailable())
     return;
 
-  RenderClientInner(true, send_callback);
+  bool have_offscreen_surfaces =
+      !(offscreen_render_surface_.IsNull() ||
+        offscreen_depth_render_surface_.IsNull());
+
+  if (have_offscreen_surfaces) {
+    if (!renderer_->StartRendering()) {
+      return;
+    }
+    renderer_->SetRenderSurfaces(offscreen_render_surface_,
+                                 offscreen_depth_render_surface_,
+                                 true);
+  }
+
+  RenderClientInner(!have_offscreen_surfaces, send_callback);
+
+  if (have_offscreen_surfaces) {
+    renderer_->SetRenderSurfaces(NULL, NULL, false);
+    renderer_->FinishRendering();
+  }
 }
 
 // Executes draw calls for all visible shapes in a subtree
@@ -503,6 +521,13 @@ String Client::GetMessageQueueAddress() const {
   }
 }
 
+void Client::SetOffscreenRenderingSurfaces(
+    RenderSurface::Ref surface,
+    RenderDepthStencilSurface::Ref depth_surface) {
+  offscreen_render_surface_ = surface;
+  offscreen_depth_render_surface_ = depth_surface;
+}
+
 // Error Related methods -------------------------------------------------------
 
 void Client::SetErrorCallback(ErrorCallback* callback) {