diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/gpu/GrPlotMgr.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/gpu/GrPlotMgr.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2010 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrPlotMgr_DEFINED
+#define GrPlotMgr_DEFINED
+
+#include "GrTypes.h"
+#include "GrPoint.h"
+#include "SkTypes.h"
+
+class GrPlotMgr : public SkNoncopyable {
+public:
+    GrPlotMgr(int width, int height) {
+        fDim.set(width, height);
+        size_t needed = width * height;
+        if (needed <= sizeof(fStorage)) {
+            fBusy = fStorage;
+        } else {
+            fBusy = SkNEW_ARRAY(char, needed);
+        }
+        this->reset();
+    }
+
+    ~GrPlotMgr() {
+        if (fBusy != fStorage) {
+            delete[] fBusy;
+        }
+    }
+
+    void reset() {
+        sk_bzero(fBusy, fDim.fX * fDim.fY);
+    }
+
+    bool newPlot(GrIPoint16* loc) {
+        char* busy = fBusy;
+        for (int y = 0; y < fDim.fY; y++) {
+            for (int x = 0; x < fDim.fX; x++) {
+                if (!*busy) {
+                    *busy = true;
+                    loc->set(x, y);
+                    return true;
+                }
+                busy++;
+            }
+        }
+        return false;
+    }
+
+    bool isBusy(int x, int y) const {
+        SkASSERT((unsigned)x < (unsigned)fDim.fX);
+        SkASSERT((unsigned)y < (unsigned)fDim.fY);
+        return fBusy[y * fDim.fX + x] != 0;
+    }
+
+    void freePlot(int x, int y) {
+        SkASSERT((unsigned)x < (unsigned)fDim.fX);
+        SkASSERT((unsigned)y < (unsigned)fDim.fY);
+        fBusy[y * fDim.fX + x] = false;
+    }
+
+private:
+    enum {
+        STORAGE = 64
+    };
+    char fStorage[STORAGE];
+    char* fBusy;
+    GrIPoint16  fDim;
+};
+
+#endif