commit 588065677213f4140b2232ea82b82e1c286edd94
author Bryan Bernhart <bryan.bernhart@intel.com> Thu Jan 05 13:09:31 2017 -0800
committer Commit Bot <commit-bot@chromium.org> Tue Jan 31 01:00:53 2017 +0000
tree 83f5ae0c43a7aac932d537da651c52ff537116b2
parent c5a2a172ee9cc30b5a5edb4fcbe8a08e37a5374d

Apply max draw buffer limit for WebGL shaders.

For WebGL, using native caps incorrectly sets gl_MaxDrawBuffers.
This change always applys the limit for compatible shaders.

BUG=angleproject:1523

Change-Id: Ie956f4b9fdd10bdf9276ae08eaeb49e65690185b
Reviewed-on: https://chromium-review.googlesource.com/425477
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/libANGLE/Compiler.cpp

diff --git a/src/libANGLE/Compiler.cpp b/src/libANGLE/Compiler.cpp
index b11baab..61db416 100644
--- a/src/libANGLE/Compiler.cpp
+++ b/src/libANGLE/Compiler.cpp
@@ -110,6 +110,11 @@
     mResources.MaxFragmentAtomicCounterBuffers = caps.maxFragmentAtomicCounterBuffers;
     mResources.MaxCombinedAtomicCounterBuffers = caps.maxCombinedAtomicCounterBuffers;
     mResources.MaxAtomicCounterBufferSize      = caps.maxAtomicCounterBufferSize;
+
+    if (state.getClientMajorVersion() == 2 && !extensions.drawBuffers)
+    {
+        mResources.MaxDrawBuffers = 1;
+    }
 }
 
 Compiler::~Compiler()