commit 4b2f915f9d29b7b5c777fb96d36bd5c00c6e54c0
author Brian Osman <brianosman@google.com> Tue Apr 17 11:19:57 2018 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Tue Apr 17 17:20:44 2018 +0000
tree 86358718f5335921373c0961488d982776ac8617
parent 053d04697acd74c45883058e81e422d731f06a0f

Move external texture extension logic into SkSL

Automatically enable the extension if any external samplers are used.

Bug: skia:7713
Change-Id: I1de2faddd7c8eda864873941b90d7a4c4606497a
Reviewed-on: https://skia-review.googlesource.com/121797
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>

src/sksl/SkSLGLSLCodeGenerator.cpp

diff --git a/src/sksl/SkSLGLSLCodeGenerator.cpp b/src/sksl/SkSLGLSLCodeGenerator.cpp
index 0ee0afa..bcf45ba 100644
--- a/src/sksl/SkSLGLSLCodeGenerator.cpp
+++ b/src/sksl/SkSLGLSLCodeGenerator.cpp
@@ -1083,6 +1083,14 @@
             }
             fFoundImageDecl = true;
         }
+        if (!fFoundExternalSamplerDecl && var.fVar->fType == *fContext.fSamplerExternalOES_Type) {
+            if (fProgram.fSettings.fCaps->externalTextureExtensionString()) {
+                fHeader.writeText("#extension ");
+                fHeader.writeText(fProgram.fSettings.fCaps->externalTextureExtensionString());
+                fHeader.writeText(" : require\n");
+            }
+            fFoundExternalSamplerDecl = true;
+        }
     }
     if (wroteType) {
         this->write(";");