Adding new bench tests for lighting and blur

bench/BlurImageFilterBench.cpp

Index: bench/BlurImageFilterBench.cpp
===================================================================
--- bench/BlurImageFilterBench.cpp	(revision 0)
+++ bench/BlurImageFilterBench.cpp	(revision 0)
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkBenchmark.h"
+#include "SkBlurImageFilter.h"
+#include "SkCanvas.h"
+#include "SkDevice.h"
+#include "SkPaint.h"
+#include "SkRandom.h"
+#include "SkShader.h"
+#include "SkString.h"
+
+#define FILTER_WIDTH_SMALL  32
+#define FILTER_HEIGHT_SMALL 32
+#define FILTER_WIDTH_LARGE  256
+#define FILTER_HEIGHT_LARGE 256
+#define BLUR_SIGMA_SMALL    SkFloatToScalar(1.0f)
+#define BLUR_SIGMA_LARGE    SkFloatToScalar(10.0f)
+
+class BlurImageFilterBench : public SkBenchmark {
+public:
+    BlurImageFilterBench(void* param, SkScalar sigmaX, SkScalar sigmaY,  bool small) :
+        INHERITED(param), fIsSmall(small), fInitialized(false), fSigmaX(sigmaX), fSigmaY(sigmaY) {
+        fName.printf("blur_image_filter_%s_%.2f_%.2f", fIsSmall ? "small" : "large",
+            SkScalarToFloat(sigmaX), SkScalarToFloat(sigmaY));
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return fName.c_str();
+    }
+
+    virtual void onPreDraw() SK_OVERRIDE {
+        if (!fInitialized) {
+            make_checkerboard();
+            fInitialized = true;
+        }
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkPaint paint;
+        paint.setImageFilter(new SkBlurImageFilter(fSigmaX, fSigmaY))->unref();
+        canvas->drawBitmap(fCheckerboard, 0, 0, &paint);
+    }
+
+private:
+    void make_checkerboard() {
+        const int w = fIsSmall ? FILTER_WIDTH_SMALL : FILTER_WIDTH_LARGE;
+        const int h = fIsSmall ? FILTER_HEIGHT_LARGE : FILTER_HEIGHT_LARGE;
+        fCheckerboard.setConfig(SkBitmap::kARGB_8888_Config, w, h);
+        fCheckerboard.allocPixels();
+        SkDevice device(fCheckerboard);
+        SkCanvas canvas(&device);
+        canvas.clear(0x00000000);
+        SkPaint darkPaint;
+        darkPaint.setColor(0xFF804020);
+        SkPaint lightPaint;
+        lightPaint.setColor(0xFF244484);
+        for (int y = 0; y < h; y += 16) {
+            for (int x = 0; x < w; x += 16) {
+                canvas.save();
+                canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
+                canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
+                canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
+                canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
+                canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
+                canvas.restore();
+            }
+        }
+    }
+
+    SkString fName;
+    bool fIsSmall;
+    bool fInitialized;
+    SkBitmap fCheckerboard;
+    SkScalar fSigmaX, fSigmaY;
+    typedef SkBenchmark INHERITED;
+};
+
+DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, true);)
+DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, false);)
+DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, true);)
+DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, false);)
+
+