164 lines
4.4 KiB
C++
164 lines
4.4 KiB
C++
/*
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* Copyright 2013 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 "gm/gm.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPath.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTypes.h"
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#include "tools/ToolUtils.h"
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#include "tools/timer/TimeUtils.h"
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// Reproduces https://code.google.com/p/chromium/issues/detail?id=279014
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constexpr int kWidth = 440;
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constexpr int kHeight = 440;
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constexpr SkScalar kAngle = 0.305f;
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constexpr int kMaxNumSteps = 140;
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// Renders a string art shape.
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// The particular shape rendered can be controlled by adjusting kAngle, from 0 to 1
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class StringArtGM : public skiagm::GM {
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public:
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StringArtGM() : fNumSteps(kMaxNumSteps) {}
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protected:
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SkString onShortName() override {
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return SkString("stringart");
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}
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SkISize onISize() override {
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return SkISize::Make(kWidth, kHeight);
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}
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void onDraw(SkCanvas* canvas) override {
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SkScalar angle = kAngle*SK_ScalarPI + SkScalarHalf(SK_ScalarPI);
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SkScalar size = SkIntToScalar(std::min(kWidth, kHeight));
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SkPoint center = SkPoint::Make(SkScalarHalf(kWidth), SkScalarHalf(kHeight));
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SkScalar length = 5;
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SkScalar step = angle;
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SkPath path;
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path.moveTo(center);
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for (int i = 0; i < fNumSteps && length < (SkScalarHalf(size) - 10.f); ++i) {
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SkPoint rp = SkPoint::Make(length*SkScalarCos(step) + center.fX,
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length*SkScalarSin(step) + center.fY);
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path.lineTo(rp);
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length += angle / SkScalarHalf(SK_ScalarPI);
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step += angle;
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}
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setColor(ToolUtils::color_to_565(0xFF007700));
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canvas->drawPath(path, paint);
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}
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bool onAnimate(double nanos) override {
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constexpr SkScalar kDesiredDurationSecs = 3.0f;
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// Make the animation ping-pong back and forth but start in the fully drawn state
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SkScalar fraction = 1.0f - TimeUtils::Scaled(1e-9 * nanos, 2.0f/kDesiredDurationSecs, 2.0f);
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if (fraction <= 0.0f) {
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fraction = -fraction;
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}
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SkASSERT(fraction >= 0.0f && fraction <= 1.0f);
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fNumSteps = (int) (fraction * kMaxNumSteps);
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return true;
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}
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private:
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int fNumSteps;
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using INHERITED = GM;
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};
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DEF_GM( return new StringArtGM; )
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/////////////////////////////////////////////////////////////////////////////////////////////////
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#if 0
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#include "modules/skottie/include/Skottie.h"
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class SkottieGM : public skiagm::GM {
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enum {
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kWidth = 800,
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kHeight = 600,
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};
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enum {
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N = 100,
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};
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skottie::Animation* fAnims[N];
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SkRect fRects[N];
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SkScalar fDur;
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public:
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SkottieGM() {
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sk_bzero(fAnims, sizeof(fAnims));
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}
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~SkottieGM() override {
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for (auto anim : fAnims) {
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SkSafeUnref(anim);
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}
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}
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protected:
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SkString onShortName() override { return SkString("skottie"); }
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SkISize onISize() override { return SkISize::Make(kWidth, kHeight); }
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void init() {
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SkRandom rand;
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auto data = SkData::MakeFromFileName("/Users/reed/Downloads/maps_pinlet.json");
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// for (;;) skottie::Animation::Make((const char*)data->data(), data->size());
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for (int i = 0; i < N; ++i) {
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fAnims[i] = skottie::Animation::Make((const char*)data->data(), data->size()).release();
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SkScalar x = rand.nextF() * kWidth;
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SkScalar y = rand.nextF() * kHeight;
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fRects[i].setXYWH(x, y, 400, 400);
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}
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fDur = fAnims[0]->duration();
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}
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void onDraw(SkCanvas* canvas) override {
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if (!fAnims[0]) {
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this->init();
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}
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canvas->drawColor(0xFFBBBBBB);
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for (int i = 0; i < N; ++i) {
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fAnims[0]->render(canvas, &fRects[i]);
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}
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}
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bool onAnimate(double nanos) override {
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SkScalar time = (float)(fmod(1e-9 * nanos, fDur) / fDur);
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for (auto anim : fAnims) {
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anim->seek(time);
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}
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return true;
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}
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private:
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using INHERITED = GM;
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};
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DEF_GM( return new SkottieGM; )
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#endif
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