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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkBlurTypes.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkMaskFilter.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPathBuilder.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/utils/SkRandom.h"
#include "src/core/SkBlurMask.h"
#include "tools/timer/TimeUtils.h"
/**
* In GM mode this draws an array of circles with different radii and different blur radii. Below
* each circle an almost-circle path is drawn with the same blur filter for comparison.
*
* In Sample mode this draws a single circle and almost-circle with animating radius and blur
* radius.
*
* Bench mode draws the same as GM mode but without the comparison almost-circle paths. It also
* slightly perturbs the blur and circle radii to stress caching of blurred profiles in GPU mode.
*/
class BlurCircles2GM : public skiagm::GM {
public:
BlurCircles2GM() {
fAnimRadius = TimeUtils::PingPong(
0, kRadiusPingPoingPeriod, kRadiusPingPoingShift, kMinRadius, kMaxRadius);
fAnimBlurRadius = TimeUtils::PingPong(0,
kBlurRadiusPingPoingPeriod,
kBlurRadiusPingPoingShift,
kMinBlurRadius,
kMaxBlurRadius);
}
protected:
bool runAsBench() const override { return true; }
SkString onShortName() override { return SkString("blurcircles2"); }
SkISize onISize() override {
return SkISize::Make(730, 1350);
}
void onDraw(SkCanvas* canvas) override {
constexpr SkScalar kMaxR = kMaxRadius + kMaxBlurRadius;
auto almostCircleMaker = [] (SkScalar radius) {
return SkPathBuilder().addArc(SkRect::MakeXYWH(-radius, -radius, 2 * radius, 2 * radius), 0, 355)
.setIsVolatile(true)
.close()
.detach();
};
auto blurMaker = [] (SkScalar radius) ->sk_sp<SkMaskFilter> {
return SkMaskFilter::MakeBlur(kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(radius));
};
SkPaint paint;
paint.setColor(SK_ColorBLACK);
if (this->getMode() == kSample_Mode) {
paint.setMaskFilter(blurMaker(fAnimBlurRadius));
SkISize size = canvas->getBaseLayerSize();
SkPath almostCircle = almostCircleMaker(fAnimRadius);
canvas->save();
canvas->translate(size.fWidth / 2.f, size.fHeight / 4.f);
canvas->drawCircle(0, 0, fAnimRadius, paint);
canvas->translate(0, 2 * kMaxR);
canvas->drawPath(almostCircle, paint);
canvas->restore();
} else {
bool benchMode = this->getMode() == kBench_Mode;
canvas->save();
constexpr SkScalar kPad = 5;
constexpr SkScalar kRadiusSteps = 5;
constexpr SkScalar kBlurRadiusSteps = 5;
canvas->translate(kPad + kMinRadius + kMaxBlurRadius,
kPad + kMinRadius + kMaxBlurRadius);
constexpr SkScalar kDeltaRadius = (kMaxRadius - kMinRadius) / kRadiusSteps;
constexpr SkScalar kDeltaBlurRadius = (kMaxBlurRadius - kMinBlurRadius) /
kBlurRadiusSteps;
SkScalar lineWidth = 0;
if (!benchMode) {
for (int r = 0; r < kRadiusSteps - 1; ++r) {
const SkScalar radius = r * kDeltaRadius + kMinRadius;
lineWidth += 2 * (radius + kMaxBlurRadius) + kPad;
}
}
for (int br = 0; br < kBlurRadiusSteps; ++br) {
SkScalar blurRadius = br * kDeltaBlurRadius + kMinBlurRadius;
if (benchMode) {
blurRadius += fRandom.nextSScalar1() * kDeltaBlurRadius;
}
const SkScalar maxRowR = blurRadius + kMaxRadius;
paint.setMaskFilter(blurMaker(blurRadius));
canvas->save();
for (int r = 0; r < kRadiusSteps; ++r) {
SkScalar radius = r * kDeltaRadius + kMinRadius;
if (benchMode) {
radius += fRandom.nextSScalar1() * kDeltaRadius;
}
SkPath almostCircle;
if (!benchMode) {
almostCircle = almostCircleMaker(radius);
}
canvas->save();
canvas->drawCircle(0, 0, radius, paint);
canvas->translate(0, 2 * maxRowR + kPad);
if (!benchMode) {
canvas->drawPath(almostCircle, paint);
}
canvas->restore();
const SkScalar maxColR = radius + kMaxBlurRadius;
canvas->translate(maxColR * 2 + kPad, 0);
}
canvas->restore();
if (!benchMode) {
SkPaint blackPaint;
blackPaint.setColor(SK_ColorBLACK);
const SkScalar lineY = 3 * maxRowR + 1.5f * kPad;
if (br != kBlurRadiusSteps - 1) {
canvas->drawLine(0, lineY, lineWidth, lineY, blackPaint);
}
}
canvas->translate(0, maxRowR * 4 + 2 * kPad);
}
canvas->restore();
}
}
bool onAnimate(double nanos) override {
fAnimRadius = TimeUtils::PingPong(1e-9 * nanos, kRadiusPingPoingPeriod, kRadiusPingPoingShift, kMinRadius,
kMaxRadius);
fAnimBlurRadius = TimeUtils::PingPong(1e-9 * nanos, kBlurRadiusPingPoingPeriod, kBlurRadiusPingPoingShift,
kMinBlurRadius, kMaxBlurRadius);
return true;
}
private:
inline static constexpr SkScalar kMinRadius = 15;
inline static constexpr SkScalar kMaxRadius = 45;
inline static constexpr SkScalar kRadiusPingPoingPeriod = 8;
inline static constexpr SkScalar kRadiusPingPoingShift = 3;
inline static constexpr SkScalar kMinBlurRadius = 5;
inline static constexpr SkScalar kMaxBlurRadius = 45;
inline static constexpr SkScalar kBlurRadiusPingPoingPeriod = 3;
inline static constexpr SkScalar kBlurRadiusPingPoingShift = 1.5;
SkScalar fAnimRadius;
SkScalar fAnimBlurRadius;
SkRandom fRandom;
using INHERITED = skiagm::GM;
};
DEF_GM(return new BlurCircles2GM();)