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 19b9e926cc093a11eaf30208bdbfbb7bb09c0e50..864a03f2e1de91873d4800e574be1365491a4e43 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -91,6 +91,7 @@ GLenum TextureToStorageFormat(ResourceFormat format) {
     case ETC1:
     case RED_8:
     case LUMINANCE_F16:
+    case RG_88:
       NOTREACHED();
       break;
   }
@@ -111,6 +112,7 @@ bool IsFormatSupportedForStorage(ResourceFormat format, bool use_bgra) {
     case ETC1:
     case RED_8:
     case LUMINANCE_F16:
+    case RG_88:
       return false;
   }
   return false;
@@ -445,6 +447,12 @@ ResourceProvider::ResourceProvider(
   use_texture_usage_hint_ = caps.texture_usage;
   use_compressed_texture_etc1_ = caps.texture_format_etc1;
   yuv_resource_format_ = caps.texture_rg ? RED_8 : LUMINANCE_8;
+  y16_resource_format_ = caps.texture_rg ? RG_88 : LUMINANCE_8;
+  // TODO(astojilj): Temporary code for performance and power consumption
+  // measurement.
+  // Uncomment following lines to use F16 for Y16.
+  // y16_resource_format_ = caps.texture_half_float_linear ? LUMINANCE_F16 :
+  // LUMINANCE_8;

[Ken Russell (switch to Gerrit), 2016/08/16 00:22:26]

Does this really use a luminance texture containing 16-bit floats? Luminance
textures are deprecated in OpenGL ES 3.0. Did you try a GL_R16F type texture?

[aleksandar.stojiljkovic, 2016/08/16 12:02:31]

It doesn't. I just reused YUV path for the prototype. Will fix it. 

[aleksandar.stojiljkovic, 2016/09/20 12:22:54]

If software planes (shared memory) are used, the case when there is no
ext_texture_rg support is disabled now (by not supporting 16 bit video in
VideoResourceUpdater::CreateForSoftwarePlanes). So, we support it for ES3 and
for ES2 when ext_texture_rg extension is available.

   yuv_highbit_resource_format_ = yuv_resource_format_;
   if (caps.texture_half_float_linear)
     yuv_highbit_resource_format_ = LUMINANCE_F16;
@@ -516,6 +524,8 @@ bool ResourceProvider::IsResourceFormatSupported(ResourceFormat format) const {
       return caps.texture_rg;
     case LUMINANCE_F16:
       return caps.texture_half_float_linear;
+    case RG_88:
+      return caps.texture_rg;
   }
 
   NOTREACHED();
@@ -547,6 +557,14 @@ ResourceFormat ResourceProvider::YuvResourceFormat(int bits) const {
   }
 }
 
+ResourceFormat ResourceProvider::Y16ResourceFormat(int bits) const {
+  if (bits > 8) {
+    return y16_resource_format_;
+  } else {
+    return yuv_resource_format_;
+  }
+}
+
 ResourceId ResourceProvider::CreateResource(const gfx::Size& size,
                                             TextureHint hint,
                                             ResourceFormat format) {