commit 02df796f466cee47f42130bd8c7dbad6c72a1662
author Austin Kinross <aukinros@microsoft.com> Wed Jul 01 10:03:42 2015 -0700
committer Jamie Madill <jmadill@chromium.org> Wed Jul 15 16:45:43 2015 +0000
tree 9e782fa8b2bc3ff1dba8d96a1a10602a43b83ce5
parent 09e2d93b8dce503e3a39242857d67632afb92532

Centralize renderer limitations for non-conformant renderers

Some renderer configurations (e.g. D3D11 Feature Level 9_3) have
some limitations and aren't quite conformant. This change
generates errors when applications hit these limitations, and
informs developers that they must work around them.

BUG=angleproject:1055

Change-Id: I6a4a9e5cc71288ca366a54c769ca0eb82e79a7f7
Reviewed-on: https://chromium-review.googlesource.com/282814
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

src/libANGLE/renderer/d3d/ProgramD3D.cpp

diff --git a/src/libANGLE/renderer/d3d/ProgramD3D.cpp b/src/libANGLE/renderer/d3d/ProgramD3D.cpp
index edbe3d5..0059516 100644
--- a/src/libANGLE/renderer/d3d/ProgramD3D.cpp
+++ b/src/libANGLE/renderer/d3d/ProgramD3D.cpp
@@ -1067,6 +1067,15 @@
     vertexShaderD3D->generateWorkarounds(&mVertexWorkarounds);
     mShaderVersion = vertexShaderD3D->getShaderVersion();
 
+    if (mRenderer->getRendererLimitations().noFrontFacingSupport)
+    {
+        if (fragmentShaderD3D->usesFrontFacing())
+        {
+            infoLog << "The current renderer doesn't support gl_FrontFacing";
+            return LinkResult(false, gl::Error(GL_NO_ERROR));
+        }
+    }
+
     // Map the varyings to the register file
     VaryingPacking packing = {};
     *registers = mDynamicHLSL->packVaryings(infoLog, packing, fragmentShaderD3D, vertexShaderD3D, transformFeedbackVaryings);