/*
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* Copyright 2018 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Benchmark.h"
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#include "SkCanvas.h"
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#include "SkImage.h"
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#include "SkRandom.h"
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#include "SkSurface.h"
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/**
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* Draws a small set of small images multiple times each with no overlaps so that each image could
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* be batched. This was originally added to detect regressions as GrTextureOp is refactored to
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* use "dynamic state" for texture bindings. Everything is kept small as we're mostly interested in
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* CPU overhead.
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*/
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class ImageCycle : public Benchmark {
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public:
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/**
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* imageCnt is the number of images and repeat cnt is how many times each image is drawn per
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* logical "frame."
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*/
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ImageCycle(int imageCnt, int repeatCnt) : fImageCnt(imageCnt), fRepeatCnt(repeatCnt) {
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fName.appendf("image_cycle_image_cnt_%d_repeat_cnt_%d", fImageCnt, fRepeatCnt);
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}
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bool isSuitableFor(Backend backend) override { return kGPU_Backend == backend; }
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protected:
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const char* onGetName() override { return fName.c_str(); }
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void onPerCanvasPreDraw(SkCanvas* canvas) override {
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auto ii = SkImageInfo::Make(kImageSize.fWidth, kImageSize.fHeight, kRGBA_8888_SkColorType,
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kPremul_SkAlphaType, nullptr);
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SkRandom random;
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fImages.reset(new sk_sp<SkImage>[fImageCnt]);
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for (int i = 0; i < fImageCnt; ++i) {
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auto surf = canvas->makeSurface(ii);
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SkColor color = random.nextU();
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surf->getCanvas()->clear(color);
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SkPaint paint;
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paint.setColor(~color);
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paint.setBlendMode(SkBlendMode::kSrc);
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surf->getCanvas()->drawRect(
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SkRect::MakeLTRB(1, 1, kImageSize.fWidth - 1, kImageSize.fHeight - 1), paint);
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fImages[i] = surf->makeImageSnapshot();
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}
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}
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void onPerCanvasPostDraw(SkCanvas*) override { fImages.reset(); }
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void onDraw(int loops, SkCanvas* canvas) override {
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SkPaint paint;
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paint.setFilterQuality(kNone_SkFilterQuality);
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paint.setAntiAlias(true);
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static constexpr SkScalar kPad = 2;
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// To avoid tripping up bounds tracking we position the draws such that all the
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// draws of image 0 are above those of image 1, etc.
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static const int imagesPerRow =
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SkScalarFloorToInt(kDeviceSize.fWidth / (kImageSize.fWidth + kPad));
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int rowsPerImage = SkScalarCeilToInt((SkScalar)fRepeatCnt / imagesPerRow);
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for (int l = 0; l < loops; ++l) {
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for (int r = 0; r < fRepeatCnt; ++r) {
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for (int i = 0; i < fImageCnt; ++i) {
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SkScalar imageYOffset = i * rowsPerImage * (kImageSize.fHeight + kPad);
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SkScalar rowYOffset = (r / imagesPerRow) * (kImageSize.fHeight + kPad);
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SkScalar x = (r % imagesPerRow) * (kImageSize.fWidth + kPad);
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canvas->drawImage(fImages[i].get(), x, imageYOffset + rowYOffset, &paint);
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}
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}
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// Prevent any batching between "frames".
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canvas->flush();
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}
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}
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private:
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SkIPoint onGetSize() override { return {kDeviceSize.fWidth, kDeviceSize.fHeight}; }
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static constexpr SkISize kImageSize{4, 4};
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static constexpr SkISize kDeviceSize{64, 64};
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std::unique_ptr<sk_sp<SkImage>[]> fImages;
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SkString fName;
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int fImageCnt;
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int fRepeatCnt;
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typedef Benchmark INHERITED;
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};
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DEF_BENCH(return new ImageCycle(5, 10));
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