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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkAnimTimer.h"
#include "SkCanvas.h"
#include "SkDashPathEffect.h"
#include "SkPath.h"
#include "SkParsePath.h"
#include "SkTArray.h"
#include "SkTrimPathEffect.h"
#include <utility>
/*
* Inspired by http://code.google.com/p/chromium/issues/detail?id=112145
*/
static void flower(SkCanvas* canvas, const SkPath& path, SkScalar intervals[2],
SkPaint::Join join) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeJoin(join);
paint.setStrokeWidth(42);
canvas->drawPath(path, paint);
paint.setColor(SK_ColorRED);
paint.setStrokeWidth(21);
paint.setPathEffect(SkDashPathEffect::Make(intervals, 2, 0));
canvas->drawPath(path, paint);
paint.setColor(SK_ColorGREEN);
paint.setPathEffect(nullptr);
paint.setStrokeWidth(0);
canvas->drawPath(path, paint);
}
DEF_SIMPLE_GM(dashcubics, canvas, 865, 750) {
SkPath path;
const char* d = "M 337,98 C 250,141 250,212 250,212 C 250,212 250,212 250,212"
"C 250,212 250,212 250,212 C 250,212 250,141 163,98 C 156,195 217,231 217,231"
"C 217,231 217,231 217,231 C 217,231 217,231 217,231 C 217,231 156,195 75,250"
"C 156,305 217,269 217,269 C 217,269 217,269 217,269 C 217,269 217,269 217,269"
"C 217,269 156,305 163,402 C 250,359 250,288 250,288 C 250,288 250,288 250,288"
"C 250,288 250,288 250,288 C 250,288 250,359 338,402 C 345,305 283,269 283,269"
"C 283,269 283,269 283,269 C 283,269 283,269 283,269 C 283,269 345,305 425,250"
"C 344,195 283,231 283,231 C 283,231 283,231 283,231 C 283,231 283,231 283,231"
"C 283,231 344,195 338,98";
SkParsePath::FromSVGString(d, &path);
canvas->translate(-35.f, -55.f);
for (int x = 0; x < 2; ++x) {
for (int y = 0; y < 2; ++y) {
canvas->save();
canvas->translate(x * 430.f, y * 355.f);
SkScalar intervals[] = { 5 + (x ? 0 : 0.0001f + 0.0001f), 10 };
flower(canvas, path, intervals, y ? SkPaint::kDefault_Join : SkPaint::kRound_Join);
canvas->restore();
}
}
}
class TrimGM : public skiagm::GM {
public:
TrimGM() {
SkAssertResult(SkParsePath::FromSVGString(
"M 0,100 C 10, 50 190, 50 200,100"
"M 200,100 C 210,150 390,150 400,100"
"M 400,100 C 390, 50 210, 50 200,100"
"M 200,100 C 190,150 10,150 0,100",
&fPaths.push_back()));
SkAssertResult(SkParsePath::FromSVGString(
"M 0, 75 L 200, 75"
"M 200, 91 L 200, 91"
"M 200,108 L 200,108"
"M 200,125 L 400,125",
&fPaths.push_back()));
SkAssertResult(SkParsePath::FromSVGString(
"M 0,100 L 50, 50"
"M 50, 50 L 150,150"
"M 150,150 L 250, 50"
"M 250, 50 L 350,150"
"M 350,150 L 400,100",
&fPaths.push_back()));
}
protected:
SkString onShortName() override { return SkString("trimpatheffect"); }
SkISize onISize() override {
return SkISize::Make(1400, 1000);
}
void onDraw(SkCanvas* canvas) override {
static constexpr SkSize kCellSize = { 440, 150 };
static constexpr SkScalar kOffsets[][2] = {
{ -0.33f, -0.66f },
{ 0 , 1 },
{ 0 , 0.25f},
{ 0.25f, 0.75f},
{ 0.75f, 1 },
{ 1 , 0.75f},
};
SkPaint hairlinePaint;
hairlinePaint.setAntiAlias(true);
hairlinePaint.setStyle(SkPaint::kStroke_Style);
hairlinePaint.setStrokeCap(SkPaint::kRound_Cap);
hairlinePaint.setStrokeWidth(2);
SkPaint normalPaint = hairlinePaint;
normalPaint.setStrokeWidth(10);
normalPaint.setColor(0x8000ff00);
SkPaint invertedPaint = normalPaint;
invertedPaint.setColor(0x80ff0000);
for (const auto& offset : kOffsets) {
auto start = offset[0] + fOffset,
stop = offset[1] + fOffset;
auto normalMode = SkTrimPathEffect::Mode::kNormal,
invertedMode = SkTrimPathEffect::Mode::kInverted;
if (fOffset) {
start -= SkScalarFloorToScalar(start);
stop -= SkScalarFloorToScalar(stop);
if (start > stop) {
using std::swap;
swap(start, stop);
swap(normalMode, invertedMode);
}
}
normalPaint.setPathEffect(SkTrimPathEffect::Make(start, stop, normalMode));
invertedPaint.setPathEffect(SkTrimPathEffect::Make(start, stop, invertedMode));
{
SkAutoCanvasRestore acr(canvas, true);
for (const auto& path : fPaths) {
canvas->drawPath(path, normalPaint);
canvas->drawPath(path, invertedPaint);
canvas->drawPath(path, hairlinePaint);
canvas->translate(kCellSize.width(), 0);
}
}
canvas->translate(0, kCellSize.height());
}
}
bool onAnimate(const SkAnimTimer& t) override {
fOffset = t.msec() / 2000.0f;
fOffset -= floorf(fOffset);
return true;
}
private:
SkTArray<SkPath> fPaths;
SkScalar fOffset = 0;
typedef skiagm::GM INHERITED;
};
DEF_GM(return new TrimGM;)
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