commit 1fe74c7e2ecd1a811332f8c23b524f18fc3f7361
author Geoff Lang <geofflang@chromium.org> Thu Aug 25 13:23:01 2016 -0400
committer Commit Bot <commit-bot@chromium.org> Fri Aug 26 19:47:28 2016 +0000
tree 15dc63037cb993ffd7dc3104e355ee1e7fc077d7
parent b0465313084ccc460c9420071dff0400edd62589

Manually compute the mipmap size for the textureSize builtin.

There were two issues with the current implementation:
 * The GetDimensions function already takes into account the base level of the
   SRV.
 * The GetDimensions function returns doesn't return valid sizes for levels
   that don't exist in the SRV.  Instead, manually do the lod offset.

BUG=angleproject:931
BUG=angleproject:1316

TEST=dEQP-GLES3.functional.shaders.texture_functions.texturesize.sampler2d_fixed_vertex

Change-Id: I63259b563a42b93b73949e0ef7ac412099a42f13
Reviewed-on: https://chromium-review.googlesource.com/376099
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

src/compiler/translator/OutputHLSL.cpp

diff --git a/src/compiler/translator/OutputHLSL.cpp b/src/compiler/translator/OutputHLSL.cpp
index 0051d2d..6391782 100644
--- a/src/compiler/translator/OutputHLSL.cpp
+++ b/src/compiler/translator/OutputHLSL.cpp
@@ -605,7 +605,9 @@
         }
     }
 
-    mTextureFunctionHLSL->textureFunctionHeader(out, mOutputType);
+    bool getDimensionsIgnoresBaseLevel =
+        (mCompileOptions & SH_HLSL_GET_DIMENSIONS_IGNORES_BASE_LEVEL) != 0;
+    mTextureFunctionHLSL->textureFunctionHeader(out, mOutputType, getDimensionsIgnoresBaseLevel);
 
     if (mUsesFragCoord)
     {