1/*
2 * Copyright 2011 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 "sk_tool_utils.h"
10#include "SkCanvas.h"
11#include "SkPath.h"
12#include "SkPaint.h"
13#include "SkRandom.h"
14
15static void drawPath(SkPath& path,SkCanvas* canvas,SkColor color,
16                     const SkRect& clip,SkPaint::Cap cap, SkPaint::Join join,
17                     SkPaint::Style style, SkPath::FillType fill,
18                     SkScalar strokeWidth) {
19        path.setFillType(fill);
20        SkPaint paint;
21        paint.setStrokeCap(cap);
22        paint.setStrokeWidth(strokeWidth);
23        paint.setStrokeJoin(join);
24        paint.setColor(color);
25        paint.setStyle(style);
26        canvas->save();
27        canvas->clipRect(clip);
28        canvas->drawPath(path, paint);
29        canvas->restore();
30}
31
32static void draw(SkCanvas* canvas, bool doClose) {
33        struct FillAndName {
34            SkPath::FillType fFill;
35            const char*      fName;
36        };
37        constexpr FillAndName gFills[] = {
38            {SkPath::kWinding_FillType, "Winding"},
39            {SkPath::kEvenOdd_FillType, "Even / Odd"},
40            {SkPath::kInverseWinding_FillType, "Inverse Winding"},
41            {SkPath::kInverseEvenOdd_FillType, "Inverse Even / Odd"},
42        };
43        struct StyleAndName {
44            SkPaint::Style fStyle;
45            const char*    fName;
46        };
47        constexpr StyleAndName gStyles[] = {
48            {SkPaint::kFill_Style, "Fill"},
49            {SkPaint::kStroke_Style, "Stroke"},
50            {SkPaint::kStrokeAndFill_Style, "Stroke And Fill"},
51        };
52        struct CapAndName {
53            SkPaint::Cap  fCap;
54            SkPaint::Join fJoin;
55            const char*   fName;
56        };
57        constexpr CapAndName gCaps[] = {
58            {SkPaint::kButt_Cap, SkPaint::kBevel_Join, "Butt"},
59            {SkPaint::kRound_Cap, SkPaint::kRound_Join, "Round"},
60            {SkPaint::kSquare_Cap, SkPaint::kBevel_Join, "Square"}
61        };
62        struct PathAndName {
63            SkPath      fPath;
64            const char* fName;
65        };
66        PathAndName path;
67        path.fPath.moveTo(25*SK_Scalar1, 15*SK_Scalar1);
68        path.fPath.lineTo(75*SK_Scalar1, 15*SK_Scalar1);
69        if (doClose) {
70            path.fPath.close();
71            path.fName = "moveTo-line-close";
72        } else {
73            path.fName = "moveTo-line";
74        }
75
76        SkPaint titlePaint;
77        titlePaint.setColor(SK_ColorBLACK);
78        titlePaint.setAntiAlias(true);
79        sk_tool_utils::set_portable_typeface(&titlePaint);
80        titlePaint.setTextSize(15 * SK_Scalar1);
81        const char titleNoClose[] = "Line Drawn Into Rectangle Clips With "
82            "Indicated Style, Fill and Linecaps, with stroke width 10";
83        const char titleClose[] = "Line Closed Drawn Into Rectangle Clips With "
84            "Indicated Style, Fill and Linecaps, with stroke width 10";
85        const char* title = doClose ? titleClose : titleNoClose;
86        canvas->drawString(title,
87                           20 * SK_Scalar1,
88                           20 * SK_Scalar1,
89                           titlePaint);
90
91        SkRandom rand;
92        SkRect rect = SkRect::MakeWH(100*SK_Scalar1, 30*SK_Scalar1);
93        canvas->save();
94        canvas->translate(10 * SK_Scalar1, 30 * SK_Scalar1);
95        canvas->save();
96        for (size_t cap = 0; cap < SK_ARRAY_COUNT(gCaps); ++cap) {
97            if (0 < cap) {
98                canvas->translate((rect.width() + 40 * SK_Scalar1) * SK_ARRAY_COUNT(gStyles), 0);
99            }
100            canvas->save();
101            for (size_t fill = 0; fill < SK_ARRAY_COUNT(gFills); ++fill) {
102                if (0 < fill) {
103                    canvas->translate(0, rect.height() + 40 * SK_Scalar1);
104                }
105                canvas->save();
106                for (size_t style = 0; style < SK_ARRAY_COUNT(gStyles); ++style) {
107                    if (0 < style) {
108                        canvas->translate(rect.width() + 40 * SK_Scalar1, 0);
109                    }
110
111                    SkColor color = sk_tool_utils::color_to_565(0xff007000);
112                    drawPath(path.fPath, canvas, color, rect,
113                                    gCaps[cap].fCap, gCaps[cap].fJoin, gStyles[style].fStyle,
114                                    gFills[fill].fFill, SK_Scalar1*10);
115
116                    SkPaint rectPaint;
117                    rectPaint.setColor(SK_ColorBLACK);
118                    rectPaint.setStyle(SkPaint::kStroke_Style);
119                    rectPaint.setStrokeWidth(-1);
120                    rectPaint.setAntiAlias(true);
121                    canvas->drawRect(rect, rectPaint);
122
123                    SkPaint labelPaint;
124                    labelPaint.setColor(color);
125                    labelPaint.setAntiAlias(true);
126                    sk_tool_utils::set_portable_typeface(&labelPaint);
127                    labelPaint.setTextSize(10 * SK_Scalar1);
128                    canvas->drawString(gStyles[style].fName,
129                                       0, rect.height() + 12 * SK_Scalar1,
130                                       labelPaint);
131                    canvas->drawString(gFills[fill].fName,
132                                       0, rect.height() + 24 * SK_Scalar1,
133                                       labelPaint);
134                    canvas->drawString(gCaps[cap].fName,
135                                       0, rect.height() + 36 * SK_Scalar1,
136                                       labelPaint);
137                }
138                canvas->restore();
139            }
140            canvas->restore();
141        }
142        canvas->restore();
143        canvas->restore();
144}
145DEF_SIMPLE_GM(linepath, canvas, 1240, 390) {
146    draw(canvas, false);
147}
148DEF_SIMPLE_GM(lineclosepath, canvas, 1240, 390) {
149    draw(canvas, true);
150}
151