linepaths.cpp revision f539318f0d3dba743ec1886d5d9df0fb1be628a1 
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#include "gm.h"
8#include "SkCanvas.h"
9#include "SkPaint.h"
10#include "SkRandom.h"
11
12namespace skiagm {
13
14class LinePathGM : public GM {
15public:
16    LinePathGM() {}
17
18protected:
19    virtual uint32_t onGetFlags() const SK_OVERRIDE {
20        return kSkipTiled_Flag;
21    }
22
23    SkString onShortName() {
24        return SkString("linepath");
25    }
26
27    SkISize onISize() { return SkISize::Make(1240, 390); }
28
29    void drawPath(SkPath& path,SkCanvas* canvas,SkColor color,
30                  const SkRect& clip,SkPaint::Cap cap, SkPaint::Join join,
31                  SkPaint::Style style, SkPath::FillType fill,
32                  SkScalar strokeWidth) {
33        path.setFillType(fill);
34        SkPaint paint;
35        paint.setStrokeCap(cap);
36        paint.setStrokeWidth(strokeWidth);
37        paint.setStrokeJoin(join);
38        paint.setColor(color);
39        paint.setStyle(style);
40        canvas->save();
41        canvas->clipRect(clip);
42        canvas->drawPath(path, paint);
43        canvas->restore();
44    }
45
46    virtual void onDraw(SkCanvas* canvas) {
47        struct FillAndName {
48            SkPath::FillType fFill;
49            const char*      fName;
50        };
51        static const FillAndName gFills[] = {
52            {SkPath::kWinding_FillType, "Winding"},
53            {SkPath::kEvenOdd_FillType, "Even / Odd"},
54            {SkPath::kInverseWinding_FillType, "Inverse Winding"},
55            {SkPath::kInverseEvenOdd_FillType, "Inverse Even / Odd"},
56        };
57        struct StyleAndName {
58            SkPaint::Style fStyle;
59            const char*    fName;
60        };
61        static const StyleAndName gStyles[] = {
62            {SkPaint::kFill_Style, "Fill"},
63            {SkPaint::kStroke_Style, "Stroke"},
64            {SkPaint::kStrokeAndFill_Style, "Stroke And Fill"},
65        };
66        struct CapAndName {
67            SkPaint::Cap  fCap;
68            SkPaint::Join fJoin;
69            const char*   fName;
70        };
71        static const CapAndName gCaps[] = {
72            {SkPaint::kButt_Cap, SkPaint::kBevel_Join, "Butt"},
73            {SkPaint::kRound_Cap, SkPaint::kRound_Join, "Round"},
74            {SkPaint::kSquare_Cap, SkPaint::kBevel_Join, "Square"}
75        };
76        struct PathAndName {
77            SkPath      fPath;
78            const char* fName;
79        };
80        PathAndName path;
81        path.fPath.moveTo(25*SK_Scalar1, 15*SK_Scalar1);
82        path.fPath.lineTo(75*SK_Scalar1, 15*SK_Scalar1);
83        path.fName = "moveTo-line";
84
85        SkPaint titlePaint;
86        titlePaint.setColor(SK_ColorBLACK);
87        titlePaint.setAntiAlias(true);
88        titlePaint.setLCDRenderText(true);
89        titlePaint.setTextSize(15 * SK_Scalar1);
90        const char title[] = "Line Drawn Into Rectangle Clips With "
91                             "Indicated Style, Fill and Linecaps, with stroke width 10";
92        canvas->drawText(title, strlen(title),
93                            20 * SK_Scalar1,
94                            20 * SK_Scalar1,
95                            titlePaint);
96
97        SkLCGRandom rand;
98        SkRect rect = SkRect::MakeWH(100*SK_Scalar1, 30*SK_Scalar1);
99        canvas->save();
100        canvas->translate(10 * SK_Scalar1, 30 * SK_Scalar1);
101        canvas->save();
102        for (size_t cap = 0; cap < SK_ARRAY_COUNT(gCaps); ++cap) {
103            if (0 < cap) {
104                canvas->translate((rect.width() + 40 * SK_Scalar1) * SK_ARRAY_COUNT(gStyles), 0);
105            }
106            canvas->save();
107            for (size_t fill = 0; fill < SK_ARRAY_COUNT(gFills); ++fill) {
108                if (0 < fill) {
109                    canvas->translate(0, rect.height() + 40 * SK_Scalar1);
110                }
111                canvas->save();
112                for (size_t style = 0; style < SK_ARRAY_COUNT(gStyles); ++style) {
113                    if (0 < style) {
114                        canvas->translate(rect.width() + 40 * SK_Scalar1, 0);
115                    }
116
117                    SkColor color = 0xff007000;
118                    this->drawPath(path.fPath, canvas, color, rect,
119                                    gCaps[cap].fCap, gCaps[cap].fJoin, gStyles[style].fStyle,
120                                    gFills[fill].fFill, SK_Scalar1*10);
121
122                    SkPaint rectPaint;
123                    rectPaint.setColor(SK_ColorBLACK);
124                    rectPaint.setStyle(SkPaint::kStroke_Style);
125                    rectPaint.setStrokeWidth(-1);
126                    rectPaint.setAntiAlias(true);
127                    canvas->drawRect(rect, rectPaint);
128
129                    SkPaint labelPaint;
130                    labelPaint.setColor(color);
131                    labelPaint.setAntiAlias(true);
132                    labelPaint.setLCDRenderText(true);
133                    labelPaint.setTextSize(10 * SK_Scalar1);
134                    canvas->drawText(gStyles[style].fName,
135                                        strlen(gStyles[style].fName),
136                                        0, rect.height() + 12 * SK_Scalar1,
137                                        labelPaint);
138                    canvas->drawText(gFills[fill].fName,
139                                        strlen(gFills[fill].fName),
140                                        0, rect.height() + 24 * SK_Scalar1,
141                                        labelPaint);
142                    canvas->drawText(gCaps[cap].fName,
143                                        strlen(gCaps[cap].fName),
144                                        0, rect.height() + 36 * SK_Scalar1,
145                                        labelPaint);
146                }
147                canvas->restore();
148            }
149            canvas->restore();
150        }
151        canvas->restore();
152        canvas->restore();
153    }
154
155private:
156    typedef GM INHERITED;
157};
158
159class LineClosePathGM : public GM {
160public:
161    LineClosePathGM() {}
162
163protected:
164    SkString onShortName() {
165        return SkString("lineclosepath");
166    }
167
168    SkISize onISize() { return SkISize::Make(1240, 390); }
169
170    void drawPath(SkPath& path,SkCanvas* canvas,SkColor color,
171                  const SkRect& clip,SkPaint::Cap cap, SkPaint::Join join,
172                  SkPaint::Style style, SkPath::FillType fill,
173                  SkScalar strokeWidth) {
174        path.setFillType(fill);
175        SkPaint paint;
176        paint.setStrokeCap(cap);
177        paint.setStrokeWidth(strokeWidth);
178        paint.setStrokeJoin(join);
179        paint.setColor(color);
180        paint.setStyle(style);
181        canvas->save();
182        canvas->clipRect(clip);
183        canvas->drawPath(path, paint);
184        canvas->restore();
185    }
186
187    virtual void onDraw(SkCanvas* canvas) {
188        struct FillAndName {
189            SkPath::FillType fFill;
190            const char*      fName;
191        };
192        static const FillAndName gFills[] = {
193            {SkPath::kWinding_FillType, "Winding"},
194            {SkPath::kEvenOdd_FillType, "Even / Odd"},
195            {SkPath::kInverseWinding_FillType, "Inverse Winding"},
196            {SkPath::kInverseEvenOdd_FillType, "Inverse Even / Odd"},
197        };
198        struct StyleAndName {
199            SkPaint::Style fStyle;
200            const char*    fName;
201        };
202        static const StyleAndName gStyles[] = {
203            {SkPaint::kFill_Style, "Fill"},
204            {SkPaint::kStroke_Style, "Stroke"},
205            {SkPaint::kStrokeAndFill_Style, "Stroke And Fill"},
206        };
207        struct CapAndName {
208            SkPaint::Cap  fCap;
209            SkPaint::Join fJoin;
210            const char*   fName;
211        };
212        static const CapAndName gCaps[] = {
213            {SkPaint::kButt_Cap, SkPaint::kBevel_Join, "Butt"},
214            {SkPaint::kRound_Cap, SkPaint::kRound_Join, "Round"},
215            {SkPaint::kSquare_Cap, SkPaint::kBevel_Join, "Square"}
216        };
217        struct PathAndName {
218            SkPath      fPath;
219            const char* fName;
220        };
221        PathAndName path;
222        path.fPath.moveTo(25*SK_Scalar1, 15*SK_Scalar1);
223        path.fPath.lineTo(75*SK_Scalar1, 15*SK_Scalar1);
224        path.fPath.close();
225        path.fName = "moveTo-line-close";
226
227        SkPaint titlePaint;
228        titlePaint.setColor(SK_ColorBLACK);
229        titlePaint.setAntiAlias(true);
230        titlePaint.setLCDRenderText(true);
231        titlePaint.setTextSize(15 * SK_Scalar1);
232        const char title[] = "Line Closed Drawn Into Rectangle Clips With "
233                             "Indicated Style, Fill and Linecaps, with stroke width 10";
234        canvas->drawText(title, strlen(title),
235                            20 * SK_Scalar1,
236                            20 * SK_Scalar1,
237                            titlePaint);
238
239        SkLCGRandom rand;
240        SkRect rect = SkRect::MakeWH(100*SK_Scalar1, 30*SK_Scalar1);
241        canvas->save();
242        canvas->translate(10 * SK_Scalar1, 30 * SK_Scalar1);
243        canvas->save();
244        for (size_t cap = 0; cap < SK_ARRAY_COUNT(gCaps); ++cap) {
245            if (0 < cap) {
246                canvas->translate((rect.width() + 40 * SK_Scalar1) * SK_ARRAY_COUNT(gStyles), 0);
247            }
248            canvas->save();
249            for (size_t fill = 0; fill < SK_ARRAY_COUNT(gFills); ++fill) {
250                if (0 < fill) {
251                    canvas->translate(0, rect.height() + 40 * SK_Scalar1);
252                }
253                canvas->save();
254                for (size_t style = 0; style < SK_ARRAY_COUNT(gStyles); ++style) {
255                    if (0 < style) {
256                        canvas->translate(rect.width() + 40 * SK_Scalar1, 0);
257                    }
258
259                    SkColor color = 0xff007000;
260                    this->drawPath(path.fPath, canvas, color, rect,
261                                    gCaps[cap].fCap, gCaps[cap].fJoin, gStyles[style].fStyle,
262                                    gFills[fill].fFill, SK_Scalar1*10);
263
264                    SkPaint rectPaint;
265                    rectPaint.setColor(SK_ColorBLACK);
266                    rectPaint.setStyle(SkPaint::kStroke_Style);
267                    rectPaint.setStrokeWidth(-1);
268                    rectPaint.setAntiAlias(true);
269                    canvas->drawRect(rect, rectPaint);
270
271                    SkPaint labelPaint;
272                    labelPaint.setColor(color);
273                    labelPaint.setAntiAlias(true);
274                    labelPaint.setLCDRenderText(true);
275                    labelPaint.setTextSize(10 * SK_Scalar1);
276                    canvas->drawText(gStyles[style].fName,
277                                        strlen(gStyles[style].fName),
278                                        0, rect.height() + 12 * SK_Scalar1,
279                                        labelPaint);
280                    canvas->drawText(gFills[fill].fName,
281                                        strlen(gFills[fill].fName),
282                                        0, rect.height() + 24 * SK_Scalar1,
283                                        labelPaint);
284                    canvas->drawText(gCaps[cap].fName,
285                                        strlen(gCaps[cap].fName),
286                                        0, rect.height() + 36 * SK_Scalar1,
287                                        labelPaint);
288                }
289                canvas->restore();
290            }
291            canvas->restore();
292        }
293        canvas->restore();
294        canvas->restore();
295    }
296
297private:
298    typedef GM INHERITED;
299};
300
301//////////////////////////////////////////////////////////////////////////////
302
303static GM* LinePathFactory(void*) { return new LinePathGM; }
304static GMRegistry regLinePath(LinePathFactory);
305
306static GM* LineClosePathFactory(void*) { return new LineClosePathGM; }
307static GMRegistry regLineClosePath(LineClosePathFactory);
308
309}
310