зеркало из https://github.com/mozilla/moz-skia.git
175 строки
4.4 KiB
C++
175 строки
4.4 KiB
C++
/*
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* Copyright 2012 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.h"
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#include "SkCanvas.h"
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#include "SkPaint.h"
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#include "Sk1DPathEffect.h"
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#include "Sk2DPathEffect.h"
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#include "SkCornerPathEffect.h"
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#include "SkDashPathEffect.h"
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#include "SkDiscretePathEffect.h"
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namespace skiagm {
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static void compose_pe(SkPaint* paint) {
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SkPathEffect* pe = paint->getPathEffect();
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SkPathEffect* corner = SkCornerPathEffect::Create(25);
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SkPathEffect* compose;
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if (pe) {
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compose = SkComposePathEffect::Create(pe, corner);
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corner->unref();
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} else {
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compose = corner;
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}
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paint->setPathEffect(compose)->unref();
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}
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static void hair_pe(SkPaint* paint) {
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paint->setStrokeWidth(0);
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}
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static void hair2_pe(SkPaint* paint) {
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paint->setStrokeWidth(0);
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compose_pe(paint);
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}
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static void stroke_pe(SkPaint* paint) {
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paint->setStrokeWidth(12);
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compose_pe(paint);
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}
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static void dash_pe(SkPaint* paint) {
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SkScalar inter[] = { 20, 10, 10, 10 };
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paint->setStrokeWidth(12);
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paint->setPathEffect(SkDashPathEffect::Create(inter, SK_ARRAY_COUNT(inter),
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0))->unref();
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compose_pe(paint);
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}
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static const int gXY[] = {
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4, 0, 0, -4, 8, -4, 12, 0, 8, 4, 0, 4
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};
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static void scale(SkPath* path, SkScalar scale) {
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SkMatrix m;
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m.setScale(scale, scale);
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path->transform(m);
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}
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static void one_d_pe(SkPaint* paint) {
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SkPath path;
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path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1]));
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for (unsigned i = 2; i < SK_ARRAY_COUNT(gXY); i += 2)
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path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1]));
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path.close();
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path.offset(SkIntToScalar(-6), 0);
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scale(&path, 1.5f);
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paint->setPathEffect(SkPath1DPathEffect::Create(path, SkIntToScalar(21), 0,
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SkPath1DPathEffect::kRotate_Style))->unref();
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compose_pe(paint);
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}
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typedef void (*PE_Proc)(SkPaint*);
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static const PE_Proc gPE[] = { hair_pe, hair2_pe, stroke_pe, dash_pe, one_d_pe };
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static void fill_pe(SkPaint* paint) {
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paint->setStyle(SkPaint::kFill_Style);
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paint->setPathEffect(NULL);
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}
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static void discrete_pe(SkPaint* paint) {
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paint->setPathEffect(SkDiscretePathEffect::Create(10, 4))->unref();
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}
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static SkPathEffect* MakeTileEffect() {
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SkMatrix m;
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m.setScale(SkIntToScalar(12), SkIntToScalar(12));
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SkPath path;
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path.addCircle(0, 0, SkIntToScalar(5));
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return SkPath2DPathEffect::Create(m, path);
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}
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static void tile_pe(SkPaint* paint) {
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paint->setPathEffect(MakeTileEffect())->unref();
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}
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static const PE_Proc gPE2[] = { fill_pe, discrete_pe, tile_pe };
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class PathEffectGM : public GM {
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public:
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PathEffectGM() {}
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protected:
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virtual uint32_t onGetFlags() const SK_OVERRIDE {
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return kSkipTiled_Flag;
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}
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SkString onShortName() {
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return SkString("patheffect");
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}
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SkISize onISize() { return make_isize(800, 600); }
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virtual void onDraw(SkCanvas* canvas) {
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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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SkPath path;
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path.moveTo(20, 20);
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path.lineTo(70, 120);
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path.lineTo(120, 30);
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path.lineTo(170, 80);
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path.lineTo(240, 50);
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size_t i;
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canvas->save();
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for (i = 0; i < SK_ARRAY_COUNT(gPE); i++) {
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gPE[i](&paint);
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canvas->drawPath(path, paint);
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canvas->translate(0, 75);
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}
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canvas->restore();
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path.reset();
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SkRect r = { 0, 0, 250, 120 };
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path.addOval(r, SkPath::kCW_Direction);
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r.inset(50, 50);
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path.addRect(r, SkPath::kCCW_Direction);
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canvas->translate(320, 20);
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for (i = 0; i < SK_ARRAY_COUNT(gPE2); i++) {
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gPE2[i](&paint);
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canvas->drawPath(path, paint);
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canvas->translate(0, 160);
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}
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SkIRect rect = SkIRect::MakeXYWH(20, 20, 60, 60);
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for (i = 0; i < SK_ARRAY_COUNT(gPE); i++) {
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SkPaint p;
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p.setAntiAlias(true);
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p.setStyle(SkPaint::kFill_Style);
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gPE[i](&p);
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canvas->drawIRect(rect, p);
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canvas->translate(75, 0);
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}
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}
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private:
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* PathEffectFactory(void*) { return new PathEffectGM; }
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static GMRegistry regPathEffect(PathEffectFactory);
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}
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