55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
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/*
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* Copyright 2021 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/gm.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkPath.h"
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constexpr int kSize = 1000;
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// Makes sure GrPathInnerTriangulateOp uses correct stencil settings when there is a clip in the
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// stencil buffer.
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static void draw_clipped_flower(SkCanvas* canvas, SkPathFillType fillType) {
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canvas->clear(SK_ColorCYAN);
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SkPath clip;
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clip.setFillType(SkPathFillType::kWinding);
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constexpr static int kGridCount = 50;
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constexpr static float kCellSize = (float)kSize / kGridCount;
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for (int y = 0; y < kGridCount; ++y) {
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clip.addRect(0, y * kCellSize, kSize, (y + 1) * kCellSize, SkPathDirection(y & 1));
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}
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for (int x = 0; x < kGridCount; ++x) {
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clip.addRect(x * kCellSize, 0, (x + 1) * kCellSize, kSize, SkPathDirection(x & 1));
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}
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canvas->clipPath(clip);
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SkPath flower;
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flower.setFillType(fillType);
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flower.moveTo(1, 0);
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constexpr static int kNumPetals = 9;
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for (int i = 1; i <= kNumPetals; ++i) {
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float c = 2*SK_ScalarPI*(i - .5f) / kNumPetals;
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float theta = 2*SK_ScalarPI*i / kNumPetals;
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flower.quadTo(cosf(c)*2, sinf(c)*2, cosf(theta), sinf(theta));
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}
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flower.close();
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flower.addArc(SkRect::MakeLTRB(-.75f, -.75f, .75f, .75f), 0, 360);
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canvas->translate(kSize/2.f, kSize/2.f);
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canvas->scale(kSize/3.f, kSize/3.f);
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SkPaint p;
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p.setAntiAlias(true);
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p.setColor(SK_ColorMAGENTA);
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canvas->drawPath(flower, p);
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}
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DEF_SIMPLE_GM(largeclippedpath_winding, canvas, kSize, kSize) {
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draw_clipped_flower(canvas, SkPathFillType::kWinding);
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}
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DEF_SIMPLE_GM(largeclippedpath_evenodd, canvas, kSize, kSize) {
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draw_clipped_flower(canvas, SkPathFillType::kEvenOdd);
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}
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