Default geometry processor

src/gpu/GrDefaultGeoProcFactory.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrDefaultGeoProcFactory_DEFINED
+#define GrDefaultGeoProcFactory_DEFINED
+
+#include "GrGeometryProcessor.h"
+
+class GrDrawState;
+
+/*
+ * A factory for creating default Geometry Processors which simply multiply position by the uniform
+ * view matrix and wire through color, coverage, UV coords if requested.  Right now this is only
+ * used in the creation of optimized draw states because adding default GPs to the drawstate can
+ * interfere with batching due to updating the drawstate.
+ * TODO When we track geometry state separately from the draw state, we should be able use a default
+ * GP with every draw call
+ */
+class GrDefaultGeoProcFactory {
+public:
+    // Structs for adding vertex attributes
+    struct PositionAttr {
+        SkPoint fPosition;
+    };
+
+    struct PositionCoverageAttr {
+        SkPoint fPosition;
+        GrColor fCoverage;
+    };
+
+    struct PositionColorAttr {
+        SkPoint fPosition;
+        SkColor fColor;
+    };
+
+    struct PositionColorCoverageAttr {
+        SkPoint fPosition;
+        SkColor fColor;
+        GrColor fCoverage;
+    };
+
+    struct PositionLocalCoordAttr {
+        SkPoint fPosition;
+        SkPoint fLocalCoord;
+    };
+
+    struct PositionLocalCoordCoverageAttr {
+        SkPoint fPosition;
+        SkPoint fLocalCoord;
+        GrColor fCoverage;
+    };
+
+    struct PositionColorLocalCoordAttr {
+        SkPoint fPosition;
+        GrColor fColor;
+        SkPoint fLocalCoord;
+    };
+
+    struct PositionColorLocalCoordCoverage {
+        SkPoint fPosition;
+        GrColor fColor;
+        SkPoint fLocalCoord;
+        GrColor fCoverage;
+    };
+
+    enum GPType {
+        kPosition_GPType = 0x0, // we ALWAYS have position
+        kColor_GPType = 0x01,
+        kLocalCoord_GPType = 0x02,
+        kCoverage_GPType= 0x04,
+        kLastGPType = kCoverage_GPType
+    };
+
+    // YOU MUST UNREF
+    static const GrGeometryProcessor* CreateAndSetAttribs(GrDrawState*, uint32_t GPTypeFlags);
+    static const GrGeometryProcessor* Create();
+};
+
+#endif