1/*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "gm.h"
9#include "SkCanvas.h"
10#include "SkPath.h"
11#include "SkTArray.h"
12
13namespace skiagm {
14
15// this GM tests hairlines which fill nearly the entire render target
16class StLouisArchGM : public GM {
17protected:
18    SkString onShortName() override {
19        return SkString("stlouisarch");
20    }
21
22    SkISize onISize() override { return SkISize::Make((int)kWidth, (int)kHeight); }
23
24    void onOnceBeforeDraw() override {
25        {
26            SkPath* bigQuad = &fPaths.push_back();
27            bigQuad->moveTo(0, 0);
28            bigQuad->quadTo(kWidth/2, kHeight, kWidth, 0);
29        }
30
31        {
32            SkPath* degenBigQuad = &fPaths.push_back();
33            SkScalar yPos = kHeight / 2 + 10;
34            degenBigQuad->moveTo(0, yPos);
35            degenBigQuad->quadTo(0, yPos, kWidth, yPos);
36        }
37
38
39        {
40            SkPath* bigCubic = &fPaths.push_back();
41            bigCubic->moveTo(0, 0);
42            bigCubic->cubicTo(0, kHeight,
43                              kWidth, kHeight,
44                              kWidth, 0);
45        }
46
47        {
48            SkPath* degenBigCubic = &fPaths.push_back();
49            SkScalar yPos = kHeight / 2;
50            degenBigCubic->moveTo(0, yPos);
51            degenBigCubic->cubicTo(0, yPos,
52                                   0, yPos,
53                                   kWidth, yPos);
54        }
55
56        {
57            SkPath* bigConic = &fPaths.push_back();
58            bigConic->moveTo(0, 0);
59            bigConic->conicTo(kWidth/2, kHeight, kWidth, 0, .5);
60        }
61
62        {
63            SkPath* degenBigConic = &fPaths.push_back();
64            SkScalar yPos = kHeight / 2 - 10;
65            degenBigConic->moveTo(0, yPos);
66            degenBigConic->conicTo(0, yPos, kWidth, yPos, .5);
67        }
68    }
69
70    void onDraw(SkCanvas* canvas) override {
71        canvas->save();
72        canvas->scale(1, -1);
73        canvas->translate(0, -kHeight);
74        for (int p = 0; p < fPaths.count(); ++p) {
75            SkPaint paint;
76            paint.setARGB(0xff, 0, 0, 0);
77            paint.setAntiAlias(true);
78            paint.setStyle(SkPaint::kStroke_Style);
79            paint.setStrokeWidth(0);
80            canvas->drawPath(fPaths[p], paint);
81        }
82        canvas->restore();
83    }
84
85    const SkScalar kWidth = 256;
86    const SkScalar kHeight = 256;
87
88private:
89    SkTArray<SkPath> fPaths;
90    typedef GM INHERITED;
91};
92
93//////////////////////////////////////////////////////////////////////////////
94
95static GM* MyFactory(void*) { return new StLouisArchGM; }
96static GMRegistry reg(MyFactory);
97
98}
99