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skia2/bench/BlurImageFilterBench.cpp
xidachen 467ddc0b24 SkBlurImageFilter returns input when sigma = 0 
In the current implementation, a blur filter is always created even in the
case when sigma.fX == 0 && sigma.fY == 0. This CL makes the blur filter
return input in this case.

BUG=568393

Review URL: https://codereview.chromium.org/1518643002
2015-12-10 12:08:44 -08:00

163 lines
7.7 KiB
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/*
* 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 "Benchmark.h"
#include "SkBlurImageFilter.h"
#include "SkOffsetImageFilter.h"
#include "SkCanvas.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_MINI 0.5f
#define BLUR_SIGMA_SMALL 1.0f
#define BLUR_SIGMA_LARGE 10.0f
#define BLUR_SIGMA_HUGE 80.0f
// When 'cropped' is set we apply a cropRect to the blurImageFilter. The crop rect is an inset of
// the source's natural dimensions. This is intended to exercise blurring a larger source bitmap
// to a smaller destination bitmap.
// When 'expanded' is set we apply a cropRect to the input of the blurImageFilter (a noOp
// offsetImageFilter). The crop rect in this case is an inset of the source's natural dimensions.
// An additional crop rect is applied to the blurImageFilter that is just the natural dimensions
// of the source (not inset). This is intended to exercise blurring a smaller source bitmap to a
// larger destination.
class BlurImageFilterBench : public Benchmark {
public:
BlurImageFilterBench(SkScalar sigmaX, SkScalar sigmaY, bool small, bool cropped,
bool expanded)
: fIsSmall(small)
, fIsCropped(cropped)
, fIsExpanded(expanded)
, fInitialized(false)
, fSigmaX(sigmaX)
, fSigmaY(sigmaY) {
fName.printf("blur_image_filter_%s%s%s_%.2f_%.2f",
fIsSmall ? "small" : "large",
fIsCropped ? "_cropped" : "",
fIsExpanded ? "_expanded" : "",
SkScalarToFloat(sigmaX), SkScalarToFloat(sigmaY));
SkASSERT(!fIsExpanded || fIsCropped); // never want expansion w/o cropping
}
protected:
const char* onGetName() override {
return fName.c_str();
}
void onDelayedSetup() override {
if (!fInitialized) {
make_checkerboard();
fInitialized = true;
}
}
void onDraw(int loops, SkCanvas* canvas) override {
SkPaint paint;
static const SkScalar kX = 0;
static const SkScalar kY = 0;
const SkRect bmpRect = SkRect::MakeXYWH(kX, kY,
SkIntToScalar(fCheckerboard.width()),
SkIntToScalar(fCheckerboard.height()));
const SkImageFilter::CropRect cropRect(bmpRect.makeInset(10.f, 10.f));
const SkImageFilter::CropRect cropRectLarge(bmpRect);
SkAutoTUnref<SkImageFilter> noOpCropped(SkOffsetImageFilter::Create(0, 0, nullptr,
&cropRect));
SkImageFilter* input = fIsExpanded ? noOpCropped.get() : nullptr;
const SkImageFilter::CropRect* crop =
fIsExpanded ? &cropRectLarge : fIsCropped ? &cropRect : nullptr;
SkAutoTUnref<SkImageFilter> blur(SkBlurImageFilter::Create(fSigmaX, fSigmaY, input, crop));
paint.setImageFilter(blur);
for (int i = 0; i < loops; i++) {
canvas->drawBitmap(fCheckerboard, kX, kY, &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.allocN32Pixels(w, h);
SkCanvas canvas(fCheckerboard);
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 fIsCropped;
bool fIsExpanded;
bool fInitialized;
SkBitmap fCheckerboard;
SkScalar fSigmaX, fSigmaY;
typedef Benchmark INHERITED;
};
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, 0, false, false, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, 0, false, false, false);)
DEF_BENCH(return new BlurImageFilterBench(0, BLUR_SIGMA_LARGE, false, false, false);)
DEF_BENCH(return new BlurImageFilterBench(0, BLUR_SIGMA_SMALL, false, false, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_MINI, BLUR_SIGMA_MINI, true, false, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_MINI, BLUR_SIGMA_MINI, false, false, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, true, false, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, false, false, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, true, false, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, false, false, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_HUGE, BLUR_SIGMA_HUGE, true, false, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_HUGE, BLUR_SIGMA_HUGE, false, false, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, 0, false, true, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, 0, false, true, false);)
DEF_BENCH(return new BlurImageFilterBench(0, BLUR_SIGMA_LARGE, false, true, false);)
DEF_BENCH(return new BlurImageFilterBench(0, BLUR_SIGMA_SMALL, false, true, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_MINI, BLUR_SIGMA_MINI, true, true, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_MINI, BLUR_SIGMA_MINI, false, true, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, true, true, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, false, true, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, true, true, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, false, true, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_HUGE, BLUR_SIGMA_HUGE, true, true, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_HUGE, BLUR_SIGMA_HUGE, false, true, false);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, 0, false, true, true);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, 0, false, true, true);)
DEF_BENCH(return new BlurImageFilterBench(0, BLUR_SIGMA_LARGE, false, true, true);)
DEF_BENCH(return new BlurImageFilterBench(0, BLUR_SIGMA_SMALL, false, true, true);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_MINI, BLUR_SIGMA_MINI, true, true, true);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_MINI, BLUR_SIGMA_MINI, false, true, true);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, true, true, true);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, false, true, true);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, true, true, true);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, false, true, true);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_HUGE, BLUR_SIGMA_HUGE, true, true, true);)
DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_HUGE, BLUR_SIGMA_HUGE, false, true, true);)
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