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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "bench/Benchmark.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkImage.h"
#include "include/effects/SkImageFilters.h"
#include "tools/Resources.h"
// Exercise a blur filter connected to 5 inputs of the same merge filter.
// This bench shows an improvement in performance once cacheing of re-used
// nodes is implemented, since the DAG is no longer flattened to a tree.
class ImageFilterDAGBench : public Benchmark {
public:
ImageFilterDAGBench() {}
protected:
const char* onGetName() override {
return "image_filter_dag";
}
void onDraw(int loops, SkCanvas* canvas) override {
const SkRect rect = SkRect::Make(SkIRect::MakeWH(400, 400));
// Set up the filters once, we're not interested in measuring allocation time here
sk_sp<SkImageFilter> blur(SkImageFilters::Blur(20.0f, 20.0f, nullptr));
sk_sp<SkImageFilter> inputs[kNumInputs];
for (int i = 0; i < kNumInputs; ++i) {
inputs[i] = blur;
}
SkPaint paint;
paint.setImageFilter(SkImageFilters::Merge(inputs, kNumInputs));
// Only measure the filter computations done in drawRect()
// TODO (michaelludwig) - This benchmark, and the ones defined below, allocate their filters
// outside of the loop. This means that repeatedly drawing with the same filter will hit
// the global image filter cache inside the loop. Raster backend uses this cache so will see
// artificially improved performance. Ganesh will not because it uses a cache per filter
// call, so only within-DAG cache hits are measured (as desired). skbug:9297 wants to move
// raster backend to the same pattern, which will make the benchmark executions fair again.
for (int j = 0; j < loops; j++) {
canvas->drawRect(rect, paint);
}
}
private:
static const int kNumInputs = 5;
typedef Benchmark INHERITED;
};
class ImageMakeWithFilterDAGBench : public Benchmark {
public:
ImageMakeWithFilterDAGBench() {}
protected:
const char* onGetName() override {
return "image_make_with_filter_dag";
}
void onDelayedSetup() override {
fImage = GetResourceAsImage("images/mandrill_512.png");
}
void onDraw(int loops, SkCanvas* canvas) override {
SkIRect subset = SkIRect::MakeSize(fImage->dimensions());
SkIPoint offset = SkIPoint::Make(0, 0);
SkIRect discardSubset;
// makeWithFilter will only use the GPU backend if the image is already a texture
sk_sp<SkImage> image = fImage->makeTextureImage(canvas->getGrContext());
if (!image) {
image = fImage;
}
// Set up the filters once so the allocation cost isn't included per-loop
sk_sp<SkImageFilter> blur(SkImageFilters::Blur(20.0f, 20.0f, nullptr));
sk_sp<SkImageFilter> inputs[kNumInputs];
for (int i = 0; i < kNumInputs; ++i) {
inputs[i] = blur;
}
sk_sp<SkImageFilter> mergeFilter = SkImageFilters::Merge(inputs, kNumInputs);
// But measure makeWithFilter() per loop since that's the focus of this benchmark
for (int j = 0; j < loops; j++) {
image = image->makeWithFilter(mergeFilter.get(), subset, subset, &discardSubset,
&offset);
SkASSERT(image && image->dimensions() == fImage->dimensions());
}
}
private:
static const int kNumInputs = 5;
sk_sp<SkImage> fImage;
typedef Benchmark INHERITED;
};
// Exercise a blur filter connected to both inputs of an SkDisplacementMapEffect.
class ImageFilterDisplacedBlur : public Benchmark {
public:
ImageFilterDisplacedBlur() {}
protected:
const char* onGetName() override {
return "image_filter_displaced_blur";
}
void onDraw(int loops, SkCanvas* canvas) override {
// Setup filter once
sk_sp<SkImageFilter> blur(SkImageFilters::Blur(4.0f, 4.0f, nullptr));
SkScalar scale = 2;
SkPaint paint;
paint.setImageFilter(SkImageFilters::DisplacementMap(SkColorChannel::kR, SkColorChannel::kR,
scale, blur, blur));
SkRect rect = SkRect::Make(SkIRect::MakeWH(400, 400));
// As before, measure just the filter computation time inside the loops
for (int j = 0; j < loops; j++) {
canvas->drawRect(rect, paint);
}
}
private:
typedef Benchmark INHERITED;
};
// Exercise an Xfermode kSrcIn filter compositing two inputs which have a small intersection.
class ImageFilterXfermodeIn : public Benchmark {
public:
ImageFilterXfermodeIn() {}
protected:
const char* onGetName() override { return "image_filter_xfermode_in"; }
void onDraw(int loops, SkCanvas* canvas) override {
// Allocate filters once to avoid measuring instantiation time
auto blur = SkImageFilters::Blur(20.0f, 20.0f, nullptr);
auto offset1 = SkImageFilters::Offset(100.0f, 100.0f, blur);
auto offset2 = SkImageFilters::Offset(-100.0f, -100.0f, blur);
auto xfermode =
SkImageFilters::Xfermode(SkBlendMode::kSrcIn, offset1, offset2, nullptr);
SkPaint paint;
paint.setImageFilter(xfermode);
// Measure only the filter time
for (int j = 0; j < loops; j++) {
canvas->drawRect(SkRect::MakeWH(200.0f, 200.0f), paint);
}
}
private:
typedef Benchmark INHERITED;
};
DEF_BENCH(return new ImageFilterDAGBench;)
DEF_BENCH(return new ImageMakeWithFilterDAGBench;)
DEF_BENCH(return new ImageFilterDisplacedBlur;)
DEF_BENCH(return new ImageFilterXfermodeIn;)