16 bpp video stream capture, render and WebGL usage - Realsense R200 & SR300 support.

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index 42eda06e3e5863520b709e78d1df3256e52dc008..d75afe5938456ab1240ceb545f0ff1002a2fb0f4 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -93,6 +93,7 @@ GLenum TextureToStorageFormat(ResourceFormat format) {
     case ETC1:
     case RED_8:
     case LUMINANCE_F16:
+    case RG_88:
       NOTREACHED();
       break;
   }
@@ -113,6 +114,7 @@ bool IsFormatSupportedForStorage(ResourceFormat format, bool use_bgra) {
     case ETC1:
     case RED_8:
     case LUMINANCE_F16:
+    case RG_88:
       return false;
   }
   return false;
@@ -458,6 +460,9 @@ ResourceProvider::ResourceProvider(
         caps.texture_half_float_linear ? LUMINANCE_F16 : yuv_resource_format_;
   }
 
+  y16_resource_format_ =
+      (!caps.disable_one_component_textures && caps.texture_rg) ? RG_88
+                                                                : RGBA_8888;
   use_sync_query_ = caps.sync_query;
 
   GLES2Interface* gl = ContextGL();
@@ -523,6 +528,7 @@ bool ResourceProvider::IsResourceFormatSupported(ResourceFormat format) const {
     case ETC1:
       return caps.texture_format_etc1;
     case RED_8:
+    case RG_88:
       return caps.texture_rg;
     case LUMINANCE_F16:
       return caps.texture_half_float_linear;
@@ -586,6 +592,10 @@ ResourceId ResourceProvider::CreateResource(
   return 0;
 }
 
+ResourceFormat ResourceProvider::Y16ResourceFormat() const {
+  return y16_resource_format_;
+}
+
 ResourceId ResourceProvider::CreateGpuMemoryBufferResource(
     const gfx::Size& size,
     TextureHint hint,
@@ -1068,6 +1078,7 @@ ResourceProvider::ScopedReadLockGL::ScopedReadLockGL(
   const Resource* resource = resource_provider->LockForRead(resource_id);
   texture_id_ = resource->gl_id;
   target_ = resource->target;
+  format_ = resource->format;
   size_ = resource->size;
   color_space_ = resource->color_space;
 }