added support for PLS path rendering

src/gpu/GrPLSGeometryProcessor.h

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrPLSGeometryProcessor_DEFINED
+#define GrPLSGeometryProcessor_DEFINED
+
+#include "GrGeometryProcessor.h"
+
+#define PLS_DATA_DECL "__pixel_localEXT PLSData {\n"\

[bsalomon, 2016/01/04 15:33:47]

Seems like this should be in a GL/GLSL specific file. Also it seems particular
to using PLS for path rendering and not a generic PLS thing.

+                      "    layout(rgba8i) ivec4 windings;\n"\
+                      "    layout(rgba8) vec4 dstColor;\n"\
+                      "} pls;\n"
+
+/**
+ * A minor extension to GrGeometryProcessor that adds bounds tracking for pixel local storage
+ * purposes.
+ */
+class GrPLSGeometryProcessor : public GrGeometryProcessor {
+public:
+    SkRect fBounds;
+
+    GrPixelLocalStorageState getPixelLocalStorageState() const override { 
+        return GrPixelLocalStorageState::kDraw_State;
+        }

[bsalomon, 2016/01/04 15:33:47]

untab }

+};
+
+#endif