Only allow zero indexes for gl_FragData when the draw buffers extension is disabled.
TRAC #23509
Signed-off-by: Shannon Woods
Signed-off-by: Nicolas Capens
Authored-by: Jamie Madill
diff --git a/src/compiler/ParseHelper.cpp b/src/compiler/ParseHelper.cpp
index 1bab3ce..aff7641 100644
--- a/src/compiler/ParseHelper.cpp
+++ b/src/compiler/ParseHelper.cpp
@@ -964,6 +964,19 @@
return (iter != extbehavior.end());
}
+bool TParseContext::isExtensionEnabled(const char* extension) const
+{
+ const TExtensionBehavior& extbehavior = extensionBehavior();
+ auto iter = extbehavior.find(extension);
+
+ if (iter == extbehavior.end())
+ {
+ return false;
+ }
+
+ return (iter->second == EBhEnable || iter->second == EBhRequire);
+}
+
void TParseContext::handleExtensionDirective(const TSourceLoc& loc, const char* extName, const char* behavior)
{
pp::SourceLocation srcLoc;
@@ -2100,6 +2113,12 @@
recover();
index = baseExpression->getType().getArraySize() - 1;
}
+ else if (baseExpression->getQualifier() == EvqFragData && index > 0 && !isExtensionEnabled("GL_EXT_draw_buffers"))
+ {
+ error(location, "", "[", "array indexes for gl_FragData must be zero when GL_EXT_draw_buffers is disabled");
+ recover();
+ index = 0;
+ }
}
else if ((baseExpression->isVector() || baseExpression->isMatrix()) && baseExpression->getType().getNominalSize() <= index)
{