Added a few bench for some image filters

bench/ColorFilterBench.cpp

Index: bench/ColorFilterBench.cpp
===================================================================
--- bench/ColorFilterBench.cpp	(revision 0)
+++ bench/ColorFilterBench.cpp	(revision 0)
@@ -0,0 +1,336 @@
+/*
+ * 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 "SkCanvas.h"
+#include "SkColorFilterImageFilter.h"
+#include "SkColorMatrixFilter.h"
+#include "SkTableColorFilter.h"
+
+#define FILTER_WIDTH_SMALL  SkIntToScalar(32)
+#define FILTER_HEIGHT_SMALL SkIntToScalar(32)
+#define FILTER_WIDTH_LARGE  SkIntToScalar(256)
+#define FILTER_HEIGHT_LARGE SkIntToScalar(256)
+
+class ColorFilterBaseBench : public SkBenchmark {
+
+public:
+    ColorFilterBaseBench(void* param, bool small) : INHERITED(param), fIsSmall(small) {
+    }
+
+protected:
+    SkRect getFilterRect() const {
+        return isSmall() ? SkRect::MakeWH(FILTER_WIDTH_SMALL, FILTER_HEIGHT_SMALL) :
+                           SkRect::MakeWH(FILTER_WIDTH_LARGE, FILTER_HEIGHT_LARGE);
+    }
+
+    static SkImageFilter* make_brightness(float amount, SkImageFilter* input = NULL) {
+        SkScalar amount255 = SkScalarMul(SkFloatToScalar(amount), SkIntToScalar(255));
+        SkScalar matrix[20] = { 1, 0, 0, 0, amount255,
+                                0, 1, 0, 0, amount255,
+                                0, 0, 1, 0, amount255,
+                                0, 0, 0, 1, 0 };
+        SkAutoTUnref<SkColorFilter> filter(new SkColorMatrixFilter(matrix));
+        return SkColorFilterImageFilter::Create(filter, input);
+    }
+
+    static SkImageFilter* make_grayscale(SkImageFilter* input = NULL) {
+        SkScalar matrix[20];
+        memset(matrix, 0, 20 * sizeof(SkScalar));
+        matrix[0] = matrix[5] = matrix[10] = SkFloatToScalar(0.2126f);
+        matrix[1] = matrix[6] = matrix[11] = SkFloatToScalar(0.7152f);
+        matrix[2] = matrix[7] = matrix[12] = SkFloatToScalar(0.0722f);
+        matrix[18] = SkFloatToScalar(1.0f);
+        SkAutoTUnref<SkColorFilter> filter(new SkColorMatrixFilter(matrix));
+        return SkColorFilterImageFilter::Create(filter, input);
+    }
+
+    static SkImageFilter* make_mode_blue(SkImageFilter* input = NULL) {
+        SkAutoTUnref<SkColorFilter> filter(
+            SkColorFilter::CreateModeFilter(SK_ColorBLUE, SkXfermode::kSrcIn_Mode));
+        return SkColorFilterImageFilter::Create(filter, input);
+    }
+
+    inline bool isSmall() const { return fIsSmall; }
+private:
+    bool fIsSmall;
+
+    typedef SkBenchmark INHERITED;
+};
+
+class ColorFilterDimBrightBench : public ColorFilterBaseBench {
+
+public:
+    ColorFilterDimBrightBench(void* param, bool small) : INHERITED(param, small) {
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return isSmall() ? "colorfilter_dim_bright_small" : "colorfilter_dim_bright_large";
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkRect r = getFilterRect();
+        SkPaint paint;
+        paint.setColor(SK_ColorRED);
+        for (float brightness = -1.0f; brightness <= 1.0f; brightness += 0.4f) {
+            SkAutoTUnref<SkImageFilter> dim(make_brightness(-brightness));
+            SkAutoTUnref<SkImageFilter> bright(make_brightness(brightness, dim));
+            paint.setImageFilter(bright);
+            canvas->drawRect(r, paint);
+        }
+    }
+
+private:
+    typedef ColorFilterBaseBench INHERITED;
+};
+
+class ColorFilterBrightGrayBench : public ColorFilterBaseBench {
+
+public:
+    ColorFilterBrightGrayBench(void* param, bool small) : INHERITED(param, small) {
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return isSmall() ? "colorfilter_bright_gray_small" : "colorfilter_bright_gray_large";
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkRect r = getFilterRect();
+        SkPaint paint;
+        paint.setColor(SK_ColorRED);
+        {
+            SkAutoTUnref<SkImageFilter> brightness(make_brightness(0.9f));
+            SkAutoTUnref<SkImageFilter> grayscale(make_grayscale(brightness));
+            paint.setImageFilter(grayscale);
+            canvas->drawRect(r, paint);
+        }
+    }
+
+private:
+    typedef ColorFilterBaseBench INHERITED;
+};
+
+class ColorFilterGrayBrightBench : public ColorFilterBaseBench {
+
+public:
+    ColorFilterGrayBrightBench(void* param, bool small) : INHERITED(param, small) {
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return isSmall() ? "colorfilter_gray_bright_small" : "colorfilter_gray_bright_large";
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkRect r = getFilterRect();
+        SkPaint paint;
+        paint.setColor(SK_ColorRED);
+        {
+            SkAutoTUnref<SkImageFilter> grayscale(make_grayscale());
+            SkAutoTUnref<SkImageFilter> brightness(make_brightness(0.9f, grayscale));
+            paint.setImageFilter(brightness);
+            canvas->drawRect(r, paint);
+        }
+    }
+
+private:
+    typedef ColorFilterBaseBench INHERITED;
+};
+
+class ColorFilterBlueBrightBench : public ColorFilterBaseBench {
+
+public:
+    ColorFilterBlueBrightBench(void* param, bool small) : INHERITED(param, small) {
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return isSmall() ? "colorfilter_blue_bright_small" : "colorfilter_blue_bright_large";
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkRect r = getFilterRect();
+        SkPaint paint;
+        paint.setColor(SK_ColorRED);
+        {
+            SkAutoTUnref<SkImageFilter> blue(make_mode_blue());
+            SkAutoTUnref<SkImageFilter> brightness(make_brightness(1.0f, blue));
+            paint.setImageFilter(brightness);
+            canvas->drawRect(r, paint);
+        }
+    }
+
+private:
+    typedef ColorFilterBaseBench INHERITED;
+};
+
+class ColorFilterBrightBlueBench : public ColorFilterBaseBench {
+
+public:
+    ColorFilterBrightBlueBench(void* param, bool small) : INHERITED(param, small) {
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return isSmall() ? "colorfilter_bright_blue_small" : "colorfilter_bright_blue_large";
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkRect r = getFilterRect();
+        SkPaint paint;
+        paint.setColor(SK_ColorRED);
+        {
+            SkAutoTUnref<SkImageFilter> brightness(make_brightness(1.0f));
+            SkAutoTUnref<SkImageFilter> blue(make_mode_blue(brightness));
+            paint.setImageFilter(blue);
+            canvas->drawRect(r, paint);
+        }
+    }
+
+private:
+    typedef ColorFilterBaseBench INHERITED;
+};
+
+class ColorFilterBrightBench : public ColorFilterBaseBench {
+
+public:
+    ColorFilterBrightBench(void* param, bool small) : INHERITED(param, small) {
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return isSmall() ? "colorfilter_bright_small" : "colorfilter_bright_large";
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkRect r = getFilterRect();
+        SkPaint paint;
+        paint.setColor(SK_ColorRED);
+        {
+            SkAutoTUnref<SkImageFilter> brightness(make_brightness(1.0f));
+            paint.setImageFilter(brightness);
+            canvas->drawRect(r, paint);
+        }
+    }
+
+private:
+    typedef ColorFilterBaseBench INHERITED;
+};
+
+class ColorFilterBlueBench : public ColorFilterBaseBench {
+
+public:
+    ColorFilterBlueBench(void* param, bool small) : INHERITED(param, small) {
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return isSmall() ? "colorfilter_blue_small" : "colorfilter_blue_large";
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkRect r = getFilterRect();
+        SkPaint paint;
+        paint.setColor(SK_ColorRED);
+        {
+            SkAutoTUnref<SkImageFilter> blue(make_mode_blue());
+            paint.setImageFilter(blue);
+            canvas->drawRect(r, paint);
+        }
+    }
+
+private:
+    typedef ColorFilterBaseBench INHERITED;
+};
+
+class ColorFilterGrayBench : public ColorFilterBaseBench {
+
+public:
+    ColorFilterGrayBench(void* param, bool small) : INHERITED(param, small) {
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return isSmall() ? "colorfilter_gray_small" : "colorfilter_gray_large";
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkRect r = getFilterRect();
+        SkPaint paint;
+        paint.setColor(SK_ColorRED);
+        {
+            SkAutoTUnref<SkImageFilter> grayscale(make_grayscale());
+            paint.setImageFilter(grayscale);
+            canvas->drawRect(r, paint);
+        }
+    }
+
+private:
+    typedef ColorFilterBaseBench INHERITED;
+};
+
+class TableColorFilterBench : public ColorFilterBaseBench {
+
+public:
+    TableColorFilterBench(void* param, bool small) : INHERITED(param, small) {
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return isSmall() ? "table_colorfilter_small" : "table_colorfilter_large";
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkRect r = getFilterRect();
+        SkPaint paint;
+        paint.setColor(SK_ColorRED);
+        {
+            SkAutoTUnref<SkColorFilter> table_filter(make_table_filter());
+            paint.setColorFilter(table_filter);
+            canvas->drawRect(r, paint);
+        }
+    }
+
+private:
+    static void fill_table_data(uint8_t table[]) {
+        for (int i = 0; i < 256; ++i) {
+            int n = i >> 5;
+            table[i] = (n << 5) | (n << 2) | (n >> 1);
+        }
+    }
+
+    static SkColorFilter* make_table_filter() {
+        uint8_t table[256]; fill_table_data(table);
+        return SkTableColorFilter::Create(table);
+    }
+
+    typedef ColorFilterBaseBench INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+DEF_BENCH( return new ColorFilterDimBrightBench(p, true); )
+DEF_BENCH( return new ColorFilterBrightGrayBench(p, true); )
+DEF_BENCH( return new ColorFilterGrayBrightBench(p, true); )
+DEF_BENCH( return new ColorFilterBlueBrightBench(p, true); )
+DEF_BENCH( return new ColorFilterBrightBlueBench(p, true); )
+DEF_BENCH( return new ColorFilterBrightBench(p, true); )
+DEF_BENCH( return new ColorFilterBlueBench(p, true); )
+DEF_BENCH( return new ColorFilterGrayBench(p, true); )
+DEF_BENCH( return new TableColorFilterBench(p, true); )
+
+DEF_BENCH( return new ColorFilterDimBrightBench(p, false); )
+DEF_BENCH( return new ColorFilterBrightGrayBench(p, false); )
+DEF_BENCH( return new ColorFilterGrayBrightBench(p, false); )
+DEF_BENCH( return new ColorFilterBlueBrightBench(p, false); )
+DEF_BENCH( return new ColorFilterBrightBlueBench(p, false); )
+DEF_BENCH( return new ColorFilterBrightBench(p, false); )
+DEF_BENCH( return new ColorFilterBlueBench(p, false); )
+DEF_BENCH( return new ColorFilterGrayBench(p, false); )
+DEF_BENCH( return new TableColorFilterBench(p, false); )
+