1 // Copyright 2020 Google LLC.
2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3 #include "tools/fiddle/examples.h"
4 REG_FIDDLE(ChromeMDRefreshTab, 256, 256, false, 0) {
GetBorderPath(float scale,bool unscale_at_end,bool extend_to_top,float endcap_width,const SkISize & size)5 SkPath GetBorderPath(float scale,
6 bool unscale_at_end,
7 bool extend_to_top,
8 float endcap_width,
9 const SkISize& size) {
10 // const float top = scale - 1;
11 const float right = size.fWidth * scale;
12 const float bottom = size.fHeight * scale;
13 const float scaled_endcap_radius = (endcap_width / 2) * scale;
14
15 SkPath path;
16 path.moveTo(0, bottom - 1);
17 // bottom left
18 path.arcTo(scaled_endcap_radius - 1, scaled_endcap_radius - 1, 90, SkPath::kSmall_ArcSize,
19 SkPathDirection::kCCW, scaled_endcap_radius - 1,
20 bottom - 1 - scaled_endcap_radius);
21 // path.rLineTo(0, -1);
22 // path.rCubicTo(0.75 * scale, 0, 1.625 * scale, -0.5 * scale, 2 * scale,
23 // -1.5 * scale);
24 path.lineTo(scaled_endcap_radius - 1, scaled_endcap_radius + 1);
25 // path.lineTo((endcap_width - 2) * scale, top + 1.5 * scale);
26 // top left
27 path.arcTo(scaled_endcap_radius + 1, scaled_endcap_radius + 1, 90, SkPath::kSmall_ArcSize,
28 SkPathDirection::kCW, scaled_endcap_radius * 2, -1);
29
30 // if (extend_to_top) {
31 // Create the vertical extension by extending the side diagonals until
32 // they reach the top of the bounds.
33 // const float dy = 2.5 * scale - 1;
34 // const float dx = Tab::GetInverseDiagonalSlope() * dy;
35 // path.rLineTo(dx, -dy);
36 // path.lineTo(right - (endcap_width - 2) * scale - dx, 0);
37 // path.rLineTo(dx, dy);
38 //} else {
39 // path.rCubicTo(0.375 * scale, -scale, 1.25 * scale, -1.5 * scale, 2 * scale,
40 // -1.5 * scale);
41 // path.lineTo(right - endcap_width * scale, top);
42 // path.rCubicTo(0.75 * scale, 0, 1.625 * scale, 0.5 * scale, 2 * scale,
43 // 1.5 * scale);
44 //}
45 path.lineTo(right - scaled_endcap_radius * 2, -1);
46 // path.lineTo(right - 2 * scale, bottom - 1 - 1.5 * scale);
47
48 // top right
49 path.arcTo(scaled_endcap_radius + 1, scaled_endcap_radius + 1, 90, SkPath::kSmall_ArcSize,
50 SkPathDirection::kCW, right - scaled_endcap_radius + 1,
51 scaled_endcap_radius + 1);
52 // path.arcTo(SkRect::MakeLTRB(right - 2 * scale, bottom - 1 - 1.5 * scale,
53 // right - 2 * scale + 4, bottom - 1 - 1.5 * scale + 4), 90, 90, true);
54 // path.rCubicTo(0.375 * scale, scale, 1.25 * scale, 1.5 * scale, 2 * scale,
55 // 1.5 * scale);
56
57 path.lineTo(right - scaled_endcap_radius + 1, bottom - 1 - scaled_endcap_radius);
58 // path.rLineTo(0, 1);
59
60 // bottom right
61 path.arcTo(scaled_endcap_radius - 1, scaled_endcap_radius - 1, 90, SkPath::kSmall_ArcSize,
62 SkPathDirection::kCCW, right, bottom - 1);
63 path.close();
64
65 if (unscale_at_end && (scale != 1)) path.transform(SkMatrix::MakeScale(1.f / scale));
66
67 return path;
68 }
69
GetInteriorPath(float scale,const SkISize & size,float endcap_width,float horizontal_inset=0)70 SkPath GetInteriorPath(
71 float scale, const SkISize& size, float endcap_width, float horizontal_inset = 0) {
72 const float right = size.fWidth * scale;
73 // The bottom of the tab needs to be pixel-aligned or else when we call
74 // ClipPath with anti-aliasing enabled it can cause artifacts.
75 const float bottom = std::ceil(size.fHeight * scale);
76
77 // const float scaled_horizontal_inset = horizontal_inset * scale;
78
79 const float scaled_endcap_radius = (endcap_width / 2) * scale;
80
81 // Construct the interior path by intersecting paths representing the left
82 // and right halves of the tab. Compared to computing the full path at once,
83 // this makes it easier to avoid overdraw in the top center near minimum
84 // width, and to implement cases where |horizontal_inset| != 0.
85 SkPath right_path;
86
87 right_path.moveTo(right, bottom);
88 // right_path.moveTo(right - 1 - scaled_horizontal_inset, bottom);
89
90 right_path.arcTo(scaled_endcap_radius, scaled_endcap_radius, 90, SkPath::kSmall_ArcSize,
91 SkPathDirection::kCW, right - scaled_endcap_radius,
92 bottom - scaled_endcap_radius);
93 // right_path.rCubicTo(-0.75 * scale, 0, -1.625 * scale, -0.5 * scale,
94 // -2 * scale, -1.5 * scale);
95
96 right_path.lineTo(right - scaled_endcap_radius, scaled_endcap_radius);
97 // right_path.lineTo(
98 // right - 1 - scaled_horizontal_inset - (endcap_width - 2) * scale,
99 // 2.5 * scale);
100
101 right_path.arcTo(scaled_endcap_radius, scaled_endcap_radius, 90, SkPath::kSmall_ArcSize,
102 SkPathDirection::kCCW, right - scaled_endcap_radius * 2, 0);
103 // right_path.rCubicTo(-0.375 * scale, -1 * scale, -1.25 * scale, -1.5 * scale,
104 // -2 * scale, -1.5 * scale);
105
106 right_path.lineTo(0, 0);
107 right_path.lineTo(0, bottom);
108 right_path.close();
109
110 SkPath left_path;
111 // const float scaled_endcap_width = 1 + endcap_width * scale;
112 left_path.moveTo(scaled_endcap_radius * 2, 0);
113 // left_path.moveTo(scaled_endcap_width + scaled_horizontal_inset, scale);
114
115 left_path.arcTo(scaled_endcap_radius, scaled_endcap_radius, 90, SkPath::kSmall_ArcSize,
116 SkPathDirection::kCCW, scaled_endcap_radius, scaled_endcap_radius);
117 // left_path.rCubicTo(-0.75 * scale, 0, -1.625 * scale, 0.5 * scale, -2 * scale,
118 // 1.5 * scale);
119
120 left_path.lineTo(scaled_endcap_radius, bottom - scaled_endcap_radius);
121 // left_path.lineTo(1 + scaled_horizontal_inset + 2 * scale,
122 // bottom - 1.5 * scale);
123
124 left_path.arcTo(scaled_endcap_radius, scaled_endcap_radius, 90, SkPath::kSmall_ArcSize,
125 SkPathDirection::kCW, 0, bottom);
126 // left_path.rCubicTo(-0.375 * scale, scale, -1.25 * scale, 1.5 * scale,
127 // -2 * scale, 1.5 * scale);
128
129 left_path.lineTo(right, bottom);
130 left_path.lineTo(right, 0);
131 left_path.close();
132
133 SkPath complete_path;
134 Op(left_path, right_path, SkPathOp::kIntersect_SkPathOp, &complete_path);
135 return complete_path;
136 }
137
draw(SkCanvas * canvas)138 void draw(SkCanvas* canvas) {
139 SkPaint p;
140 p.setColor(SK_ColorRED);
141 p.setAntiAlias(true);
142 p.setStyle(SkPaint::kStroke_Style);
143 p.setStrokeWidth(1);
144 SkPath path = GetInteriorPath(1.f, SkISize::Make(250, 36), 16);
145 path.transform(SkMatrix::MakeTrans(0, 30));
146 canvas->drawPath(path, p);
147
148 p.setColor(SK_ColorBLUE);
149 SkPath border_path = GetBorderPath(1.f, false, false, 16, SkISize::Make(250, 36));
150 border_path.transform(SkMatrix::MakeTrans(0, 30));
151 canvas->drawPath(border_path, p);
152
153 // canvas->drawLine(20, 20, 100, 100, p);
154 }
155 } // END FIDDLE
156