blob: 230a253ee887e9899a532ea4cf269ae806ee8a7f [file] [log] [blame]
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkDrawable.h"
#include "include/core/SkFont.h"
#include "include/core/SkPath.h"
#include "include/core/SkPathMeasure.h"
#include "include/core/SkPictureRecorder.h"
#include "include/core/SkRegion.h"
#include "include/core/SkShader.h"
#include "include/core/SkString.h"
#include "include/effects/Sk1DPathEffect.h"
#include "include/effects/SkCornerPathEffect.h"
#include "include/effects/SkGradientShader.h"
#include "include/utils/SkParsePath.h"
#include "include/utils/SkTextUtils.h"
#include "src/base/SkRandom.h"
#include "src/base/SkUTF.h"
#include "tools/fonts/FontToolUtils.h"
#include "tools/viewer/Slide.h"
class ArcsSlide : public Slide {
class MyDrawable : public SkDrawable {
SkRect fR;
SkScalar fSweep;
public:
MyDrawable(const SkRect& r) : fR(r), fSweep(0) {}
void setSweep(SkScalar sweep) {
if (fSweep != sweep) {
fSweep = sweep;
this->notifyDrawingChanged();
}
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStrokeWidth(SkIntToScalar(2));
paint.setStyle(SkPaint::kFill_Style);
paint.setColor(0x800000FF);
canvas->drawArc(fR, 0, fSweep, true, paint);
paint.setColor(0x800FF000);
canvas->drawArc(fR, 0, fSweep, false, paint);
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(SK_ColorRED);
canvas->drawArc(fR, 0, fSweep, true, paint);
paint.setStrokeWidth(0);
paint.setColor(SK_ColorBLUE);
canvas->drawArc(fR, 0, fSweep, false, paint);
}
SkRect onGetBounds() override {
SkRect r(fR);
r.outset(2, 2);
return r;
}
};
SkRect fRect = {20, 20, 220, 220};
sk_sp<MyDrawable> fAnimatingDrawable;
sk_sp<SkDrawable> fRootDrawable;
static void DrawRectWithLines(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
canvas->drawRect(r, p);
canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, p);
canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, p);
canvas->drawLine(r.fLeft, r.centerY(), r.fRight, r.centerY(), p);
canvas->drawLine(r.centerX(), r.fTop, r.centerX(), r.fBottom, p);
}
static void DrawLabel(SkCanvas* canvas, const SkRect& rect, SkScalar start, SkScalar sweep) {
SkFont font = ToolUtils::DefaultFont();
SkString str;
str.appendScalar(start);
str.append(", ");
str.appendScalar(sweep);
SkTextUtils::DrawString(canvas, str.c_str(), rect.centerX(),
rect.fBottom + font.getSize() * 5/4, font, SkPaint(),
SkTextUtils::kCenter_Align);
}
static void DrawArcs(SkCanvas* canvas) {
SkPaint paint;
SkRect r;
SkScalar w = 75;
SkScalar h = 50;
r.setWH(w, h);
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
canvas->save();
canvas->translate(SkIntToScalar(10), SkIntToScalar(300));
paint.setStrokeWidth(SkIntToScalar(1));
static const SkScalar gAngles[] = {
0, 360,
0, 45,
0, -45,
720, 135,
-90, 269,
-90, 270,
-90, 271,
-180, -270,
225, 90
};
for (size_t i = 0; i < std::size(gAngles); i += 2) {
paint.setColor(SK_ColorBLACK);
DrawRectWithLines(canvas, r, paint);
paint.setColor(SK_ColorRED);
canvas->drawArc(r, gAngles[i], gAngles[i+1], false, paint);
DrawLabel(canvas, r, gAngles[i], gAngles[i+1]);
canvas->translate(w * 8 / 7, 0);
}
canvas->restore();
}
void drawRoot(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStrokeWidth(SkIntToScalar(2));
paint.setStyle(SkPaint::kStroke_Style);
DrawRectWithLines(canvas, fRect, paint);
canvas->drawDrawable(fAnimatingDrawable.get());
DrawArcs(canvas);
}
public:
ArcsSlide() { fName = "Arcs"; }
void load(SkScalar w, SkScalar h) override {
fAnimatingDrawable = sk_make_sp<MyDrawable>(fRect);
SkPictureRecorder recorder;
this->drawRoot(recorder.beginRecording(SkRect::MakeWH(800, 500)));
fRootDrawable = recorder.finishRecordingAsDrawable();
}
void draw(SkCanvas* canvas) override {
canvas->clear(0xFFDDDDDD);
canvas->drawDrawable(fRootDrawable.get());
}
bool animate(double nanos) override {
SkScalar angle = SkDoubleToScalar(fmod(1e-9 * nanos * 360 / 24, 360));
if (fAnimatingDrawable) {
fAnimatingDrawable->setSweep(angle);
}
return true;
}
};
DEF_SLIDE( return new ArcsSlide(); )