1 files changed, 64 insertions, 1 deletions

diff --git a/Source/ThirdParty/ANGLE/src/compiler/Compiler.cpp b/Source/ThirdParty/ANGLE/src/compiler/Compiler.cpp
index f27cb75d5..cab8056bc 100644
--- a/Source/ThirdParty/ANGLE/src/compiler/Compiler.cpp
+++ b/Source/ThirdParty/ANGLE/src/compiler/Compiler.cpp
@@ -8,10 +8,21 @@
 #include "compiler/DetectRecursion.h"
 #include "compiler/ForLoopUnroll.h"
 #include "compiler/Initialize.h"
+#include "compiler/InitializeParseContext.h"
 #include "compiler/MapLongVariableNames.h"
 #include "compiler/ParseHelper.h"
+#include "compiler/RenameFunction.h"
 #include "compiler/ShHandle.h"
 #include "compiler/ValidateLimitations.h"
+#include "compiler/depgraph/DependencyGraph.h"
+#include "compiler/depgraph/DependencyGraphOutput.h"
+#include "compiler/timing/RestrictFragmentShaderTiming.h"
+#include "compiler/timing/RestrictVertexShaderTiming.h"
+
+bool isWebGLBasedSpec(ShShaderSpec spec)
+{
+     return spec == SH_WEBGL_SPEC || spec == SH_CSS_SHADERS_SPEC;
+}
 
 namespace {
 bool InitializeSymbolTable(
@@ -123,7 +134,7 @@ bool TCompiler::compile(const char* const shaderStrings[],
         return true;
 
     // If compiling for WebGL, validate loop and indexing as well.
-    if (shaderSpec == SH_WEBGL_SPEC)
+    if (isWebGLBasedSpec(shaderSpec))
         compileOptions |= SH_VALIDATE_LOOP_INDEXING;
 
     // First string is path of source file if flag is set. The actual source follows.
@@ -161,6 +172,12 @@ bool TCompiler::compile(const char* const shaderStrings[],
         if (success && (compileOptions & SH_VALIDATE_LOOP_INDEXING))
             success = validateLimitations(root);
 
+        if (success && (compileOptions & SH_TIMING_RESTRICTIONS))
+            success = enforceTimingRestrictions(root, (compileOptions & SH_DEPENDENCY_GRAPH) != 0);
+
+        if (success && shaderSpec == SH_CSS_SHADERS_SPEC)
+            rewriteCSSShader(root);
+
         // Unroll for-loop markup needs to happen after validateLimitations pass.
         if (success && (compileOptions & SH_UNROLL_FOR_LOOP_WITH_INTEGER_INDEX))
             ForLoopUnroll::MarkForLoopsWithIntegerIndicesForUnrolling(root);
@@ -235,12 +252,58 @@ bool TCompiler::detectRecursion(TIntermNode* root)
     }
 }
 
+void TCompiler::rewriteCSSShader(TIntermNode* root)
+{
+    RenameFunction renamer("main(", "css_main(");
+    root->traverse(&renamer);
+}
+
 bool TCompiler::validateLimitations(TIntermNode* root) {
     ValidateLimitations validate(shaderType, infoSink.info);
     root->traverse(&validate);
     return validate.numErrors() == 0;
 }
 
+bool TCompiler::enforceTimingRestrictions(TIntermNode* root, bool outputGraph)
+{
+    if (shaderSpec != SH_WEBGL_SPEC) {
+        infoSink.info << "Timing restrictions must be enforced under the WebGL spec.";
+        return false;
+    }
+
+    if (shaderType == SH_FRAGMENT_SHADER) {
+        TDependencyGraph graph(root);
+
+        // Output any errors first.
+        bool success = enforceFragmentShaderTimingRestrictions(graph);
+        
+        // Then, output the dependency graph.
+        if (outputGraph) {
+            TDependencyGraphOutput output(infoSink.info);
+            output.outputAllSpanningTrees(graph);
+        }
+        
+        return success;
+    }
+    else {
+        return enforceVertexShaderTimingRestrictions(root);
+    }
+}
+
+bool TCompiler::enforceFragmentShaderTimingRestrictions(const TDependencyGraph& graph)
+{
+    RestrictFragmentShaderTiming restrictor(infoSink.info);
+    restrictor.enforceRestrictions(graph);
+    return restrictor.numErrors() == 0;
+}
+
+bool TCompiler::enforceVertexShaderTimingRestrictions(TIntermNode* root)
+{
+    RestrictVertexShaderTiming restrictor(infoSink.info);
+    restrictor.enforceRestrictions(root);
+    return restrictor.numErrors() == 0;
+}
+
 void TCompiler::collectAttribsUniforms(TIntermNode* root)
 {
     CollectAttribsUniforms collect(attribs, uniforms);