quadpaths.cpp revision 80bacfeb4bda06541e8695bd502229727bccfeab 
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 QuadPathGM : public GM {
15public:
16    QuadPathGM() {}
17
18protected:
19    SkString onShortName() {
20        return SkString("quadpath");
21    }
22
23    SkISize onISize() { return make_isize(1240, 390); }
24
25    void drawPath(SkPath& path,SkCanvas* canvas,SkColor color,
26                  const SkRect& clip,SkPaint::Cap cap, SkPaint::Join join,
27                  SkPaint::Style style, SkPath::FillType fill,
28                  SkScalar strokeWidth) {
29        path.setFillType(fill);
30        SkPaint paint;
31        paint.setStrokeCap(cap);
32        paint.setStrokeWidth(strokeWidth);
33        paint.setStrokeJoin(join);
34        paint.setColor(color);
35        paint.setStyle(style);
36        canvas->save();
37        canvas->clipRect(clip);
38        canvas->drawPath(path, paint);
39        canvas->restore();
40    }
41
42    virtual void onDraw(SkCanvas* canvas) {
43        struct FillAndName {
44            SkPath::FillType fFill;
45            const char*      fName;
46        };
47        static const FillAndName gFills[] = {
48            {SkPath::kWinding_FillType, "Winding"},
49            {SkPath::kEvenOdd_FillType, "Even / Odd"},
50            {SkPath::kInverseWinding_FillType, "Inverse Winding"},
51            {SkPath::kInverseEvenOdd_FillType, "Inverse Even / Odd"},
52        };
53        struct StyleAndName {
54            SkPaint::Style fStyle;
55            const char*    fName;
56        };
57        static const StyleAndName gStyles[] = {
58            {SkPaint::kFill_Style, "Fill"},
59            {SkPaint::kStroke_Style, "Stroke"},
60            {SkPaint::kStrokeAndFill_Style, "Stroke And Fill"},
61        };
62        struct CapAndName {
63            SkPaint::Cap  fCap;
64            SkPaint::Join fJoin;
65            const char*   fName;
66        };
67        static const CapAndName gCaps[] = {
68            {SkPaint::kButt_Cap, SkPaint::kBevel_Join, "Butt"},
69            {SkPaint::kRound_Cap, SkPaint::kRound_Join, "Round"},
70            {SkPaint::kSquare_Cap, SkPaint::kBevel_Join, "Square"}
71        };
72        struct PathAndName {
73            SkPath      fPath;
74            const char* fName;
75        };
76        PathAndName path;
77        path.fPath.moveTo(25*SK_Scalar1, 10*SK_Scalar1);
78        path.fPath.quadTo(50*SK_Scalar1, 20*SK_Scalar1,
79                          75*SK_Scalar1, 10*SK_Scalar1);
80        path.fName = "moveTo-quad";
81
82        SkPaint titlePaint;
83        titlePaint.setColor(SK_ColorBLACK);
84        titlePaint.setAntiAlias(true);
85        titlePaint.setLCDRenderText(true);
86        titlePaint.setTextSize(15 * SK_Scalar1);
87        const char title[] = "Quad Drawn Into Rectangle Clips With "
88                             "Indicated Style, Fill and Linecaps, with stroke width 10";
89        canvas->drawText(title, strlen(title),
90                            20 * SK_Scalar1,
91                            20 * SK_Scalar1,
92                            titlePaint);
93
94        SkRandom rand;
95        SkRect rect = SkRect::MakeWH(100*SK_Scalar1, 30*SK_Scalar1);
96        canvas->save();
97        canvas->translate(10 * SK_Scalar1, 30 * SK_Scalar1);
98        canvas->save();
99        for (size_t cap = 0; cap < SK_ARRAY_COUNT(gCaps); ++cap) {
100            if (0 < cap) {
101                canvas->translate((rect.width() + 40 * SK_Scalar1) * SK_ARRAY_COUNT(gStyles), 0);
102            }
103            canvas->save();
104            for (size_t fill = 0; fill < SK_ARRAY_COUNT(gFills); ++fill) {
105                if (0 < fill) {
106                    canvas->translate(0, rect.height() + 40 * SK_Scalar1);
107                }
108                canvas->save();
109                for (size_t style = 0; style < SK_ARRAY_COUNT(gStyles); ++style) {
110                    if (0 < style) {
111                        canvas->translate(rect.width() + 40 * SK_Scalar1, 0);
112                    }
113
114                    SkColor color = 0xff007000;
115                    this->drawPath(path.fPath, canvas, color, rect,
116                                    gCaps[cap].fCap, gCaps[cap].fJoin, gStyles[style].fStyle,
117                                    gFills[fill].fFill, SK_Scalar1*10);
118
119                    SkPaint rectPaint;
120                    rectPaint.setColor(SK_ColorBLACK);
121                    rectPaint.setStyle(SkPaint::kStroke_Style);
122                    rectPaint.setStrokeWidth(-1);
123                    rectPaint.setAntiAlias(true);
124                    canvas->drawRect(rect, rectPaint);
125
126                    SkPaint labelPaint;
127                    labelPaint.setColor(color);
128                    labelPaint.setAntiAlias(true);
129                    labelPaint.setLCDRenderText(true);
130                    labelPaint.setTextSize(10 * SK_Scalar1);
131                    canvas->drawText(gStyles[style].fName,
132                                        strlen(gStyles[style].fName),
133                                        0, rect.height() + 12 * SK_Scalar1,
134                                        labelPaint);
135                    canvas->drawText(gFills[fill].fName,
136                                        strlen(gFills[fill].fName),
137                                        0, rect.height() + 24 * SK_Scalar1,
138                                        labelPaint);
139                    canvas->drawText(gCaps[cap].fName,
140                                        strlen(gCaps[cap].fName),
141                                        0, rect.height() + 36 * SK_Scalar1,
142                                        labelPaint);
143                }
144                canvas->restore();
145            }
146            canvas->restore();
147        }
148        canvas->restore();
149        canvas->restore();
150    }
151
152private:
153    typedef GM INHERITED;
154};
155
156class QuadClosePathGM : public GM {
157public:
158    QuadClosePathGM() {}
159
160protected:
161    SkString onShortName() {
162        return SkString("quadclosepath");
163    }
164
165    SkISize onISize() { return make_isize(1240, 390); }
166
167    void drawPath(SkPath& path,SkCanvas* canvas,SkColor color,
168                  const SkRect& clip,SkPaint::Cap cap, SkPaint::Join join,
169                  SkPaint::Style style, SkPath::FillType fill,
170                  SkScalar strokeWidth) {
171        path.setFillType(fill);
172        SkPaint paint;
173        paint.setStrokeCap(cap);
174        paint.setStrokeWidth(strokeWidth);
175        paint.setStrokeJoin(join);
176        paint.setColor(color);
177        paint.setStyle(style);
178        canvas->save();
179        canvas->clipRect(clip);
180        canvas->drawPath(path, paint);
181        canvas->restore();
182    }
183
184    virtual void onDraw(SkCanvas* canvas) {
185        struct FillAndName {
186            SkPath::FillType fFill;
187            const char*      fName;
188        };
189        static const FillAndName gFills[] = {
190            {SkPath::kWinding_FillType, "Winding"},
191            {SkPath::kEvenOdd_FillType, "Even / Odd"},
192            {SkPath::kInverseWinding_FillType, "Inverse Winding"},
193            {SkPath::kInverseEvenOdd_FillType, "Inverse Even / Odd"},
194        };
195        struct StyleAndName {
196            SkPaint::Style fStyle;
197            const char*    fName;
198        };
199        static const StyleAndName gStyles[] = {
200            {SkPaint::kFill_Style, "Fill"},
201            {SkPaint::kStroke_Style, "Stroke"},
202            {SkPaint::kStrokeAndFill_Style, "Stroke And Fill"},
203        };
204        struct CapAndName {
205            SkPaint::Cap  fCap;
206            SkPaint::Join fJoin;
207            const char*   fName;
208        };
209        static const CapAndName gCaps[] = {
210            {SkPaint::kButt_Cap, SkPaint::kBevel_Join, "Butt"},
211            {SkPaint::kRound_Cap, SkPaint::kRound_Join, "Round"},
212            {SkPaint::kSquare_Cap, SkPaint::kBevel_Join, "Square"}
213        };
214        struct PathAndName {
215            SkPath      fPath;
216            const char* fName;
217        };
218        PathAndName path;
219        path.fPath.moveTo(25*SK_Scalar1, 10*SK_Scalar1);
220        path.fPath.quadTo(50*SK_Scalar1, 20*SK_Scalar1,
221                          75*SK_Scalar1, 10*SK_Scalar1);
222        path.fPath.close();
223        path.fName = "moveTo-quad-close";
224
225        SkPaint titlePaint;
226        titlePaint.setColor(SK_ColorBLACK);
227        titlePaint.setAntiAlias(true);
228        titlePaint.setLCDRenderText(true);
229        titlePaint.setTextSize(15 * SK_Scalar1);
230        const char title[] = "Quad Closed Drawn Into Rectangle Clips With "
231                             "Indicated Style, Fill and Linecaps, with stroke width 10";
232        canvas->drawText(title, strlen(title),
233                            20 * SK_Scalar1,
234                            20 * SK_Scalar1,
235                            titlePaint);
236
237        SkRandom rand;
238        SkRect rect = SkRect::MakeWH(100*SK_Scalar1, 30*SK_Scalar1);
239        canvas->save();
240        canvas->translate(10 * SK_Scalar1, 30 * SK_Scalar1);
241        canvas->save();
242        for (size_t cap = 0; cap < SK_ARRAY_COUNT(gCaps); ++cap) {
243            if (0 < cap) {
244                canvas->translate((rect.width() + 40 * SK_Scalar1) * SK_ARRAY_COUNT(gStyles), 0);
245            }
246            canvas->save();
247            for (size_t fill = 0; fill < SK_ARRAY_COUNT(gFills); ++fill) {
248                if (0 < fill) {
249                    canvas->translate(0, rect.height() + 40 * SK_Scalar1);
250                }
251                canvas->save();
252                for (size_t style = 0; style < SK_ARRAY_COUNT(gStyles); ++style) {
253                    if (0 < style) {
254                        canvas->translate(rect.width() + 40 * SK_Scalar1, 0);
255                    }
256
257                    SkColor color = 0xff007000;
258                    this->drawPath(path.fPath, canvas, color, rect,
259                                    gCaps[cap].fCap, gCaps[cap].fJoin, gStyles[style].fStyle,
260                                    gFills[fill].fFill, SK_Scalar1*10);
261
262                    SkPaint rectPaint;
263                    rectPaint.setColor(SK_ColorBLACK);
264                    rectPaint.setStyle(SkPaint::kStroke_Style);
265                    rectPaint.setStrokeWidth(-1);
266                    rectPaint.setAntiAlias(true);
267                    canvas->drawRect(rect, rectPaint);
268
269                    SkPaint labelPaint;
270                    labelPaint.setColor(color);
271                    labelPaint.setAntiAlias(true);
272                    labelPaint.setLCDRenderText(true);
273                    labelPaint.setTextSize(10 * SK_Scalar1);
274                    canvas->drawText(gStyles[style].fName,
275                                        strlen(gStyles[style].fName),
276                                        0, rect.height() + 12 * SK_Scalar1,
277                                        labelPaint);
278                    canvas->drawText(gFills[fill].fName,
279                                        strlen(gFills[fill].fName),
280                                        0, rect.height() + 24 * SK_Scalar1,
281                                        labelPaint);
282                    canvas->drawText(gCaps[cap].fName,
283                                        strlen(gCaps[cap].fName),
284                                        0, rect.height() + 36 * SK_Scalar1,
285                                        labelPaint);
286                }
287                canvas->restore();
288            }
289            canvas->restore();
290        }
291        canvas->restore();
292        canvas->restore();
293    }
294
295private:
296    typedef GM INHERITED;
297};
298
299//////////////////////////////////////////////////////////////////////////////
300
301static GM* QuadPathFactory(void*) { return new QuadPathGM; }
302static GMRegistry regQuadPath(QuadPathFactory);
303
304static GM* QuadClosePathFactory(void*) { return new QuadClosePathGM; }
305static GMRegistry regQuadClosePath(QuadClosePathFactory);
306
307}
308