1 files changed, 41 insertions, 0 deletions
diff --git a/src/gpu/GrPipelineAnalysis.cpp b/src/gpu/GrPipelineAnalysis.cpp
new file mode 100644
index 0000000000..3512c940b0
--- /dev/null
+++ b/src/gpu/GrPipelineAnalysis.cpp
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrPipelineAnalysis.h"
+#include "GrGeometryProcessor.h"
+#include "ops/GrDrawOp.h"
+
+void GrColorFragmentProcessorAnalysis::analyzeProcessors(
+        const GrFragmentProcessor* const* processors, int cnt) {
+    for (int i = 0; i < cnt; ++i) {
+        bool knowCurrentOutput = fProcessorsVisitedWithKnownOutput == fTotalProcessorsVisited;
+        if (fUsesLocalCoords && !knowCurrentOutput &&
+            !fAllProcessorsCompatibleWithCoverageAsAlpha && !fIsOpaque) {
+            fTotalProcessorsVisited += cnt - i;
+            return;
+        }
+        const GrFragmentProcessor* fp = processors[i];
+        if (knowCurrentOutput &&
+            fp->hasConstantOutputForConstantInput(fLastKnownOutputColor, &fLastKnownOutputColor)) {
+            ++fProcessorsVisitedWithKnownOutput;
+            fIsOpaque = fLastKnownOutputColor.isOpaque();
+            // We reset these since the caller is expected to not use the earlier fragment
+            // processors.
+            fAllProcessorsCompatibleWithCoverageAsAlpha = true;
+            fUsesLocalCoords = false;
+        } else if (fIsOpaque && !fp->preservesOpaqueInput()) {
+            fIsOpaque = false;
+        }
+        if (fAllProcessorsCompatibleWithCoverageAsAlpha && !fp->compatibleWithCoverageAsAlpha()) {
+            fAllProcessorsCompatibleWithCoverageAsAlpha = false;
+        }
+        if (fp->usesLocalCoords()) {
+            fUsesLocalCoords = true;
+        }
+        ++fTotalProcessorsVisited;
+    }
+}