Fix the rendering error of SkDraw::drawVertices in gpu path for solid color

include/core/SkVertState.h

Index: include/core/SkVertState.h
diff --git a/include/core/SkVertState.h b/include/core/SkVertState.h
new file mode 100644
index 0000000000000000000000000000000000000000..d0cc886769ac3b055de3c4a3de609d6775396d09
--- /dev/null
+++ b/include/core/SkVertState.h
@@ -0,0 +1,42 @@
+/*
+ * 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 SkVertState_DEFINED
+#define SkVertState_DEFINED
+
+#include "SkCanvas.h"
+
+struct VertState {

[bsalomon, 2014/05/15 13:13:33]

I think this class could use some documentation if it is to be moved out to its
own files. It doesn't own the indices ptr, that should be noted. Also something
about what it is used for and how it used.

[yunchao, 2014/05/15 14:15:53]

Agree. I will update the document for your reviewing.

+    int f0, f1, f2;
+
+    VertState(int vCount, const uint16_t indices[], int indexCount)
+            : fIndices(indices) {
+        fCurrIndex = 0;
+        if (indices) {
+            fCount = indexCount;
+        } else {
+            fCount = vCount;
+        }
+    }
+
+    typedef bool (*Proc)(VertState*);
+    Proc chooseProc(SkCanvas::VertexMode mode);
+
+private:
+    int             fCount;
+    int             fCurrIndex;
+    const uint16_t* fIndices;
+
+    static bool Triangles(VertState*);
+    static bool TrianglesX(VertState*);
+    static bool TriangleStrip(VertState*);
+    static bool TriangleStripX(VertState*);
+    static bool TriangleFan(VertState*);
+    static bool TriangleFanX(VertState*);
+};
+
+#endif