зеркало из https://github.com/mozilla/moz-skia.git
126 строки
3.2 KiB
C++
126 строки
3.2 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 "SkConcaveToTriangles.h"
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#define SIZE SkIntToScalar(150)
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typedef void (*PathProc)(SkPath*);
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static void make_path0(SkPath* path) {
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SkRect r;
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r.set(0, 0, SIZE, SIZE);
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path->addRect(r);
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}
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static void make_path1(SkPath* path) {
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SkRect r;
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r.set(0, 0, SIZE, SIZE);
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path->addRoundRect(r, SIZE/4, SIZE/4);
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}
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static void make_path2(SkPath* path) {
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SkRect r;
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r.set(0, 0, SIZE, SIZE);
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path->addOval(r);
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}
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static const PathProc gProcs[] = {
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make_path0,
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make_path1,
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make_path2,
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};
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#define COUNT_PROCS SK_ARRAY_COUNT(gProcs)
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class TriangleView : public SkView {
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public:
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SkPath fPaths[COUNT_PROCS];
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TriangleView() {
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for (size_t i = 0; i < COUNT_PROCS; i++) {
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gProcs[i](&fPaths[i]);
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}
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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, "Triangles");
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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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void drawBG(SkCanvas* canvas) {
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canvas->drawColor(SK_ColorGRAY);
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}
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static void draw_path(SkCanvas* canvas, const SkPaint& pathPaint,
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const SkPath& path, const SkPaint& triPaint) {
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canvas->drawPath(path, pathPaint);
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int n = path.getPoints(NULL, 0);
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SkPoint* pts = new SkPoint[n];
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path.getPoints(pts, n);
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SkTDArray<SkPoint> triangles;
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if (SkConcaveToTriangles(n, pts, &triangles)) {
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canvas->drawVertices(SkCanvas::kTriangles_VertexMode,
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triangles.count(), triangles.begin(), NULL,
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NULL, NULL, NULL, 0, triPaint);
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}
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SkPaint paint;
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paint.setColor(SK_ColorGREEN);
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paint.setStrokeWidth(SkIntToScalar(4));
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canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, paint);
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delete[] pts;
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}
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virtual void onDraw(SkCanvas* canvas) {
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this->drawBG(canvas);
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canvas->translate(SIZE/2, SIZE/2);
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SkPaint pathPaint, triPaint;
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pathPaint.setColor(SK_ColorBLUE);
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pathPaint.setStrokeWidth(SIZE / 12);
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triPaint.setColor(SK_ColorRED);
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triPaint.setStyle(SkPaint::kStroke_Style);
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for (size_t i = 0; i < COUNT_PROCS; i++) {
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pathPaint.setStyle(SkPaint::kFill_Style);
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draw_path(canvas, pathPaint, fPaths[i], triPaint);
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canvas->save();
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canvas->translate(0, SIZE * 6 / 5);
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pathPaint.setStyle(SkPaint::kStroke_Style);
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draw_path(canvas, pathPaint, fPaths[i], triPaint);
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canvas->restore();
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canvas->translate(SIZE * 6 / 5, 0);
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}
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}
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private:
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typedef SkView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new TriangleView; }
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static SkViewRegister reg(MyFactory);
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