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130 lines
3.8 KiB
130 lines
3.8 KiB
/*
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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 "SkPath.h"
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#define STROKE_WIDTH SkIntToScalar(20)
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static void draw_path(SkCanvas* canvas, const SkPath& path, const SkRect& rect,
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SkPaint::Join join, int doFill) {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(doFill ? SkPaint::kStrokeAndFill_Style : SkPaint::kStroke_Style);
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paint.setColor(SK_ColorGRAY);
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paint.setStrokeWidth(STROKE_WIDTH);
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paint.setStrokeJoin(join);
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canvas->drawRect(rect, paint);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(0);
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paint.setColor(SK_ColorRED);
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canvas->drawPath(path, paint);
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paint.setStrokeWidth(3);
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paint.setStrokeJoin(SkPaint::kMiter_Join);
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int n = path.countPoints();
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SkAutoTArray<SkPoint> points(n);
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path.getPoints(points.get(), n);
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canvas->drawPoints(SkCanvas::kPoints_PointMode, n, points.get(), paint);
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}
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/*
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* Test calling SkStroker for rectangles. Cases to cover:
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*
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* geometry: normal, small (smaller than stroke-width), empty, inverted
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* joint-type for the corners
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*/
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class StrokeRectGM : public skiagm::GM {
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public:
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StrokeRectGM() {}
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protected:
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SkString onShortName() override {
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return SkString("strokerect");
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}
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SkISize onISize() override {
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return SkISize::Make(1400, 740);
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->drawColor(SK_ColorWHITE);
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canvas->translate(STROKE_WIDTH*3/2, STROKE_WIDTH*3/2);
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SkPaint paint;
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(STROKE_WIDTH);
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constexpr SkPaint::Join gJoins[] = {
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SkPaint::kMiter_Join, SkPaint::kRound_Join, SkPaint::kBevel_Join
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};
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constexpr SkScalar W = 80;
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constexpr SkScalar H = 80;
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constexpr SkRect gRects[] = {
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{ 0, 0, W, H },
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{ W, 0, 0, H },
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{ 0, H, W, 0 },
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{ 0, 0, STROKE_WIDTH, H },
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{ 0, 0, W, STROKE_WIDTH },
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{ 0, 0, STROKE_WIDTH/2, STROKE_WIDTH/2 },
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{ 0, 0, W, 0 },
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{ 0, 0, 0, H },
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{ 0, 0, 0, 0 },
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{ 0, 0, W, FLT_EPSILON },
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{ 0, 0, FLT_EPSILON, H },
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{ 0, 0, FLT_EPSILON, FLT_EPSILON },
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};
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for (int doFill = 0; doFill <= 1; ++doFill) {
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for (size_t i = 0; i < SK_ARRAY_COUNT(gJoins); ++i) {
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SkPaint::Join join = gJoins[i];
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paint.setStrokeJoin(join);
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SkAutoCanvasRestore acr(canvas, true);
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for (size_t j = 0; j < SK_ARRAY_COUNT(gRects); ++j) {
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const SkRect& r = gRects[j];
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SkPath path, fillPath;
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path.addRect(r);
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paint.getFillPath(path, &fillPath);
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draw_path(canvas, fillPath, r, join, doFill);
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canvas->translate(W + 2 * STROKE_WIDTH, 0);
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}
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acr.restore();
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canvas->translate(0, H + 2 * STROKE_WIDTH);
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}
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paint.setStyle(SkPaint::kStrokeAndFill_Style);
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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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DEF_GM(return new StrokeRectGM;)
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/*
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* Exercise rect-stroking (which is specialized from paths) when the resulting stroke-width is
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* non-square. See https://bugs.chromium.org/p/skia/issues/detail?id=5408
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*/
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DEF_SIMPLE_GM(strokerect_anisotropic_5408, canvas, 200, 50) {
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SkPaint p;
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p.setStyle(SkPaint::kStroke_Style);
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p.setStrokeWidth(6);
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canvas->scale(10, 1);
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SkRect r = SkRect::MakeXYWH(5, 20, 10, 10);
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canvas->drawRect(r, p);
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}
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