зеркало из https://github.com/mozilla/moz-skia.git
148 строки
3.6 KiB
C++
148 строки
3.6 KiB
C++
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/*
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* Copyright 2011 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 "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkGraphics.h"
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#include "SkRandom.h"
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#include "SkBlurDrawLooper.h"
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#include "SkGradientShader.h"
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typedef SkScalar (*MakePathProc)(SkPath*);
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static SkScalar make_frame(SkPath* path) {
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SkRect r = { 10, 10, 630, 470 };
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path->addRoundRect(r, 15, 15);
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SkPaint paint;
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(5);
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paint.getFillPath(*path, path);
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return 15;
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}
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static SkScalar make_triangle(SkPath* path) {
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static const int gCoord[] = {
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10, 20, 15, 5, 30, 30
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};
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path->moveTo(SkIntToScalar(gCoord[0]), SkIntToScalar(gCoord[1]));
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path->lineTo(SkIntToScalar(gCoord[2]), SkIntToScalar(gCoord[3]));
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path->lineTo(SkIntToScalar(gCoord[4]), SkIntToScalar(gCoord[5]));
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path->close();
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path->offset(10, 0);
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return SkIntToScalar(30);
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}
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static SkScalar make_rect(SkPath* path) {
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SkRect r = { 10, 10, 30, 30 };
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path->addRect(r);
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path->offset(10, 0);
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return SkIntToScalar(30);
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}
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static SkScalar make_oval(SkPath* path) {
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SkRect r = { 10, 10, 30, 30 };
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path->addOval(r);
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path->offset(10, 0);
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return SkIntToScalar(30);
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}
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static SkScalar make_sawtooth(SkPath* path) {
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SkScalar x = SkIntToScalar(20);
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SkScalar y = SkIntToScalar(20);
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const SkScalar x0 = x;
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const SkScalar dx = SK_Scalar1 * 5;
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const SkScalar dy = SK_Scalar1 * 10;
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path->moveTo(x, y);
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for (int i = 0; i < 32; i++) {
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x += dx;
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path->lineTo(x, y - dy);
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x += dx;
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path->lineTo(x, y + dy);
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}
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path->lineTo(x, y + 2 * dy);
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path->lineTo(x0, y + 2 * dy);
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path->close();
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return SkIntToScalar(30);
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}
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static SkScalar make_star(SkPath* path, int n) {
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const SkScalar c = SkIntToScalar(45);
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const SkScalar r = SkIntToScalar(20);
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SkScalar rad = -SK_ScalarPI / 2;
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const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;
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path->moveTo(c, c - r);
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for (int i = 1; i < n; i++) {
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rad += drad;
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SkScalar cosV, sinV = SkScalarSinCos(rad, &cosV);
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path->lineTo(c + SkScalarMul(cosV, r), c + SkScalarMul(sinV, r));
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}
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path->close();
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return r * 2 * 6 / 5;
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}
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static SkScalar make_star_5(SkPath* path) { return make_star(path, 5); }
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static SkScalar make_star_13(SkPath* path) { return make_star(path, 13); }
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static const MakePathProc gProcs[] = {
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make_frame,
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make_triangle,
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make_rect,
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make_oval,
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make_sawtooth,
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make_star_5,
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make_star_13
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};
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#define N SK_ARRAY_COUNT(gProcs)
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class PathFillView : public SampleView {
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SkPath fPath[N];
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SkScalar fDY[N];
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public:
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PathFillView() {
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for (size_t i = 0; i < N; i++) {
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fDY[i] = gProcs[i](&fPath[i]);
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}
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this->setBGColor(0xFFDDDDDD);
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "PathFill");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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virtual void onDrawContent(SkCanvas* canvas) {
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SkPaint paint;
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paint.setAntiAlias(true);
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for (size_t i = 0; i < N; i++) {
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canvas->drawPath(fPath[i], paint);
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canvas->translate(0, fDY[i]);
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}
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}
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private:
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typedef SampleView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new PathFillView; }
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static SkViewRegister reg(MyFactory);
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