commit 4a98cdb7612493a062358cebd1141c9bcaa37ab1
author cdalton <cdalton@nvidia.com> Tue Mar 01 12:12:20 2016 -0800
committer Commit bot <commit-bot@chromium.org> Tue Mar 01 12:12:20 2016 -0800
tree 7cb8f8efe42f159ead3b9a2b102da1099efa03d7
parent b3f3148ac4a3da7fe5aa1428da1f6a17c37e8f4b

Add cap and builder feature for multisample interpolation

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1722363002

Review URL: https://codereview.chromium.org/1722363002

src/gpu/gl/GrGLCaps.cpp

diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index 792f3ed..132e9b2 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -640,6 +640,19 @@
     }
 
     if (kGL_GrGLStandard == standard) {
+        glslCaps->fMultisampleInterpolationSupport =
+                ctxInfo.glslGeneration() >= k400_GrGLSLGeneration;
+    } else {
+        if (ctxInfo.glslGeneration() >= k320es_GrGLSLGeneration) {
+            glslCaps->fMultisampleInterpolationSupport = true;
+        } else if (ctxInfo.hasExtension("GL_OES_shader_multisample_interpolation")) {
+            glslCaps->fMultisampleInterpolationSupport = true;
+            glslCaps->fMultisampleInterpolationExtensionString =
+                "GL_OES_shader_multisample_interpolation";
+        }
+    }
+
+    if (kGL_GrGLStandard == standard) {
         glslCaps->fSampleVariablesSupport = ctxInfo.glslGeneration() >= k400_GrGLSLGeneration;
     } else {
         if (ctxInfo.glslGeneration() >= k320es_GrGLSLGeneration) {