1 files changed, 52 insertions, 0 deletions
diff --git a/src/gpu/gl/GrGLGeometryProcessor.h b/src/gpu/gl/GrGLGeometryProcessor.h
new file mode 100644
index 0000000000..4b9bd449fb
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+++ b/src/gpu/gl/GrGLGeometryProcessor.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrGLGeometryProcessor_DEFINED
+#define GrGLGeometryProcessor_DEFINED
+
+#include "GrGLEffect.h"
+
+/**
+ * If a GL effect needs a GrGLFullShaderBuilder* object to emit vertex code, then it must inherit
+ * from this class. Since paths don't have vertices, this class is only meant to be used internally
+ * by skia, for special cases.
+ */
+class GrGLGeometryProcessor : public GrGLEffect {
+public:
+    GrGLGeometryProcessor(const GrBackendEffectFactory& factory)
+        : INHERITED(factory) { fIsVertexEffect = true; }
+
+    /**
+     * This is similar to emitCode() in the base class, except it takes a full shader builder.
+     * This allows the effect subclass to emit vertex code.
+     */
+    virtual void emitCode(GrGLFullProgramBuilder* builder,
+                          const GrDrawEffect& drawEffect,
+                          const GrEffectKey& key,
+                          const char* outputColor,
+                          const char* inputColor,
+                          const TransformedCoordsArray& coords,
+                          const TextureSamplerArray& samplers) = 0;
+    /**
+     * Provide a default override for base class's emitCode() function.
+     */
+    virtual void emitCode(GrGLProgramBuilder* builder,
+                          const GrDrawEffect& drawEffect,
+                          const GrEffectKey& key,
+                          const char* outputColor,
+                          const char* inputColor,
+                          const TransformedCoordsArray& coords,
+                          const TextureSamplerArray& samplers) SK_OVERRIDE {
+        SkFAIL("GrGLGeometryProcessor requires GrGLFullProgramBuilder* overload for emitCode().");
+    }
+
+
+private:
+    typedef GrGLEffect INHERITED;
+};
+
+#endif