| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPathBuilder.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| |
| class ScaledStrokesGM : public skiagm::GM { |
| public: |
| ScaledStrokesGM() {} |
| |
| protected: |
| SkString getName() const override { return SkString("scaledstrokes"); } |
| |
| SkISize getISize() override { return SkISize::Make(640, 320); } |
| |
| static void draw_path(SkScalar size, SkCanvas* canvas, SkPaint paint) { |
| SkScalar c = 0.551915024494f * size; |
| SkPathBuilder path; |
| path.moveTo(0.0f, size); |
| path.cubicTo(c, size, size, c, size, 0.0f); |
| path.cubicTo(size, -c, c, -size, 0.0f, -size); |
| path.cubicTo(-c, -size, -size, -c, -size, 0.0f); |
| path.cubicTo(-size, c, -c, size, 0.0f, size); |
| canvas->drawPath(path.detach(), paint); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkPaint paint; |
| SkPath path; |
| paint.setStyle(SkPaint::Style::kStroke_Style); |
| canvas->translate(5.0f, 5.0f); |
| const SkScalar size = 60.0f; |
| for (int i = 0; i < 2; i++) { |
| paint.setAntiAlias(i == 1); |
| for (int j = 0; j < 4; j++) { |
| SkScalar scale = 4.0f - j; |
| paint.setStrokeWidth(4.0f / scale); |
| canvas->save(); |
| canvas->translate(size / 2.0f, size / 2.0f); |
| canvas->scale(scale, scale); |
| draw_path(size / 2.0f / scale, canvas, paint); |
| canvas->restore(); |
| |
| canvas->save(); |
| canvas->translate(size / 2.0f, 80.0f + size / 2.0f); |
| canvas->scale(scale, scale); |
| canvas->drawCircle(0.0f, 0.0f, size / 2.0f / scale, paint); |
| canvas->restore(); |
| |
| canvas->save(); |
| canvas->translate(0.0f, 160.0f); |
| canvas->scale(scale, scale); |
| canvas->drawRect(SkRect::MakeXYWH(0.0f, 0.0f, size / scale, size / scale), paint); |
| canvas->restore(); |
| |
| canvas->save(); |
| canvas->translate(0.0f, 240.0f); |
| canvas->scale(scale, scale); |
| canvas->drawLine(0.0f, 0.0f, size / scale, size / scale, paint); |
| canvas->restore(); |
| |
| canvas->translate(80.0f, 0.0f); |
| } |
| } |
| |
| } |
| |
| private: |
| using INHERITED = GM; |
| }; |
| |
| DEF_GM( return new ScaledStrokesGM; ) |