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

gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc

Index: gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc b/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc
index 91ce24e7c397572874a1109436e29acb9ed49f9b..111cf317ed3f2c47b0ed985905be6e83ce48b995 100644
--- a/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc
+++ b/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc
@@ -419,6 +419,21 @@ void CopyTextureCHROMIUMResourceManager::DoCopyTexture(
       (source_internal_format == dest_internal_format &&
        source_internal_format != GL_BGRA_EXT) ||
       (source_internal_format == GL_RGBA && dest_internal_format == GL_RGB);
+  if (!source_format_contain_superset_of_dest_format) {
+    using GL = gles2::GLES2Util;
+    uint32_t source_channels = GL::GetChannelsForFormat(source_internal_format);
+    uint32_t dest_channels = GL::GetChannelsForFormat(dest_internal_format);
+    const gles2::FeatureInfo* info = decoder->GetFeatureInfo();
+    source_format_contain_superset_of_dest_format =
+        (GL::IsIntegerFormat(dest_internal_format) ==
+         GL::IsIntegerFormat(source_internal_format)) &&
+        (source_channels == dest_channels) &&
+        (((dest_channels == GL::kRed || dest_channels == GL::kAlpha ||
+           dest_channels == (GL::kRed | GL::kGreen)) &&
+          info->IsES3Capable()) ||
+         (dest_channels == GL::kRed && info->feature_flags().ext_texture_rg &&
+          !GL::IsIntegerFormat(dest_internal_format)));

[Ken Russell (switch to Gerrit), 2016/09/30 23:01:29]

This addition to the code is very highly specialized to your use case. Can you
simplify and generalize it, and still keep it working for your uses?

[aleksandar.stojiljkovic, 2016/10/03 10:56:52]

Done. This would be useful later - edited out from this patch as not WebGL1
related.

+  }
   // GL_TEXTURE_RECTANGLE_ARB on FBO is supported by OpenGL, not GLES2,
   // so restrict this to GL_TEXTURE_2D.
   if (source_target == GL_TEXTURE_2D && dest_target == GL_TEXTURE_2D &&