1 /*
2 * Copyright 2014 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
11 #include "SkBitmap.h"
12 #include "SkGradientShader.h"
13 #include "SkPath.h"
14 #include "SkTLList.h"
15
make_bmp(int w,int h)16 static SkBitmap make_bmp(int w, int h) {
17 SkBitmap bmp;
18 bmp.allocN32Pixels(w, h, true);
19
20 SkCanvas canvas(bmp);
21 SkScalar wScalar = SkIntToScalar(w);
22 SkScalar hScalar = SkIntToScalar(h);
23
24 SkPoint pt = { wScalar / 2, hScalar / 2 };
25
26 SkScalar radius = 3 * SkMaxScalar(wScalar, hScalar);
27
28 SkColor colors[] = { sk_tool_utils::color_to_565(SK_ColorDKGRAY),
29 sk_tool_utils::color_to_565(0xFF222255),
30 sk_tool_utils::color_to_565(0xFF331133),
31 sk_tool_utils::color_to_565(0xFF884422),
32 sk_tool_utils::color_to_565(0xFF000022), SK_ColorWHITE,
33 sk_tool_utils::color_to_565(0xFFAABBCC) };
34
35 SkScalar pos[] = {0,
36 SK_Scalar1 / 6,
37 2 * SK_Scalar1 / 6,
38 3 * SK_Scalar1 / 6,
39 4 * SK_Scalar1 / 6,
40 5 * SK_Scalar1 / 6,
41 SK_Scalar1};
42
43 SkPaint paint;
44 SkRect rect = SkRect::MakeWH(wScalar, hScalar);
45 SkMatrix mat = SkMatrix::I();
46 for (int i = 0; i < 4; ++i) {
47 paint.setShader(SkGradientShader::MakeRadial(
48 pt, radius,
49 colors, pos,
50 SK_ARRAY_COUNT(colors),
51 SkShader::kRepeat_TileMode,
52 0, &mat));
53 canvas.drawRect(rect, paint);
54 rect.inset(wScalar / 8, hScalar / 8);
55 mat.preTranslate(6 * wScalar, 6 * hScalar);
56 mat.postScale(SK_Scalar1 / 3, SK_Scalar1 / 3);
57 }
58
59 paint.setAntiAlias(true);
60 sk_tool_utils::set_portable_typeface(&paint);
61 paint.setTextSize(wScalar / 2.2f);
62 paint.setShader(0);
63 paint.setColor(sk_tool_utils::color_to_565(SK_ColorLTGRAY));
64 constexpr char kTxt[] = "Skia";
65 SkPoint texPos = { wScalar / 17, hScalar / 2 + paint.getTextSize() / 2.5f };
66 canvas.drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1, texPos.fX, texPos.fY, paint);
67 paint.setColor(SK_ColorBLACK);
68 paint.setStyle(SkPaint::kStroke_Style);
69 paint.setStrokeWidth(SK_Scalar1);
70 canvas.drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1, texPos.fX, texPos.fY, paint);
71 return bmp;
72 }
73
74 namespace skiagm {
75 /**
76 * This GM tests convex polygon clips.
77 */
78 class ConvexPolyClip : public GM {
79 public:
ConvexPolyClip()80 ConvexPolyClip() {
81 this->setBGColor(0xFFFFFFFF);
82 }
83
84 protected:
onShortName()85 SkString onShortName() override {
86 return SkString("convex_poly_clip");
87 }
88
onISize()89 SkISize onISize() override {
90 // When benchmarking the saveLayer set of draws is skipped.
91 int w = 435;
92 if (kBench_Mode != this->getMode()) {
93 w *= 2;
94 }
95 return SkISize::Make(w, 540);
96 }
97
onOnceBeforeDraw()98 void onOnceBeforeDraw() override {
99 SkPath tri;
100 tri.moveTo(5.f, 5.f);
101 tri.lineTo(100.f, 20.f);
102 tri.lineTo(15.f, 100.f);
103
104 fClips.addToTail()->setPath(tri);
105
106 SkPath hexagon;
107 constexpr SkScalar kRadius = 45.f;
108 const SkPoint center = { kRadius, kRadius };
109 for (int i = 0; i < 6; ++i) {
110 SkScalar angle = 2 * SK_ScalarPI * i / 6;
111 SkPoint point;
112 point.fY = SkScalarSinCos(angle, &point.fX);
113 point.scale(kRadius);
114 point = center + point;
115 if (0 == i) {
116 hexagon.moveTo(point);
117 } else {
118 hexagon.lineTo(point);
119 }
120 }
121 fClips.addToTail()->setPath(hexagon);
122
123 SkMatrix scaleM;
124 scaleM.setScale(1.1f, 0.4f, kRadius, kRadius);
125 hexagon.transform(scaleM);
126 fClips.addToTail()->setPath(hexagon);
127
128 fClips.addToTail()->setRect(SkRect::MakeXYWH(8.3f, 11.6f, 78.2f, 72.6f));
129
130 SkPath rotRect;
131 SkRect rect = SkRect::MakeLTRB(10.f, 12.f, 80.f, 86.f);
132 rotRect.addRect(rect);
133 SkMatrix rotM;
134 rotM.setRotate(23.f, rect.centerX(), rect.centerY());
135 rotRect.transform(rotM);
136 fClips.addToTail()->setPath(rotRect);
137
138 fBmp = make_bmp(100, 100);
139 }
140
onDraw(SkCanvas * canvas)141 void onDraw(SkCanvas* canvas) override {
142 SkScalar y = 0;
143 constexpr SkScalar kMargin = 10.f;
144
145 SkPaint bgPaint;
146 bgPaint.setAlpha(0x15);
147 SkISize size = canvas->getBaseLayerSize();
148 canvas->drawBitmapRect(fBmp, SkRect::MakeIWH(size.fWidth, size.fHeight), &bgPaint);
149
150 constexpr char kTxt[] = "Clip Me!";
151 SkPaint txtPaint;
152 txtPaint.setTextSize(23.f);
153 txtPaint.setAntiAlias(true);
154 sk_tool_utils::set_portable_typeface(&txtPaint);
155 txtPaint.setColor(sk_tool_utils::color_to_565(SK_ColorDKGRAY));
156 SkScalar textW = txtPaint.measureText(kTxt, SK_ARRAY_COUNT(kTxt)-1);
157
158 SkScalar startX = 0;
159 int testLayers = kBench_Mode != this->getMode();
160 for (int doLayer = 0; doLayer <= testLayers; ++doLayer) {
161 for (ClipList::Iter iter(fClips, ClipList::Iter::kHead_IterStart);
162 iter.get();
163 iter.next()) {
164 const Clip* clip = iter.get();
165 SkScalar x = startX;
166 for (int aa = 0; aa < 2; ++aa) {
167 if (doLayer) {
168 SkRect bounds;
169 clip->getBounds(&bounds);
170 bounds.outset(2, 2);
171 bounds.offset(x, y);
172 canvas->saveLayer(&bounds, nullptr);
173 } else {
174 canvas->save();
175 }
176 canvas->translate(x, y);
177 clip->setOnCanvas(canvas, kIntersect_SkClipOp, SkToBool(aa));
178 canvas->drawBitmap(fBmp, 0, 0);
179 canvas->restore();
180 x += fBmp.width() + kMargin;
181 }
182 for (int aa = 0; aa < 2; ++aa) {
183
184 SkPaint clipOutlinePaint;
185 clipOutlinePaint.setAntiAlias(true);
186 clipOutlinePaint.setColor(0x50505050);
187 clipOutlinePaint.setStyle(SkPaint::kStroke_Style);
188 clipOutlinePaint.setStrokeWidth(0);
189
190 if (doLayer) {
191 SkRect bounds;
192 clip->getBounds(&bounds);
193 bounds.outset(2, 2);
194 bounds.offset(x, y);
195 canvas->saveLayer(&bounds, nullptr);
196 } else {
197 canvas->save();
198 }
199 canvas->translate(x, y);
200 SkPath closedClipPath;
201 clip->asClosedPath(&closedClipPath);
202 canvas->drawPath(closedClipPath, clipOutlinePaint);
203 clip->setOnCanvas(canvas, kIntersect_SkClipOp, SkToBool(aa));
204 canvas->scale(1.f, 1.8f);
205 canvas->drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1,
206 0, 1.5f * txtPaint.getTextSize(),
207 txtPaint);
208 canvas->restore();
209 x += textW + 2 * kMargin;
210 }
211 y += fBmp.height() + kMargin;
212 }
213 y = 0;
214 startX += 2 * fBmp.width() + SkScalarCeilToInt(2 * textW) + 6 * kMargin;
215 }
216 }
217
runAsBench() const218 bool runAsBench() const override { return true; }
219
220 private:
221 class Clip {
222 public:
223 enum ClipType {
224 kNone_ClipType,
225 kPath_ClipType,
226 kRect_ClipType
227 };
228
Clip()229 Clip () : fClipType(kNone_ClipType) {}
230
setOnCanvas(SkCanvas * canvas,SkClipOp op,bool aa) const231 void setOnCanvas(SkCanvas* canvas, SkClipOp op, bool aa) const {
232 switch (fClipType) {
233 case kPath_ClipType:
234 canvas->clipPath(fPath, op, aa);
235 break;
236 case kRect_ClipType:
237 canvas->clipRect(fRect, op, aa);
238 break;
239 case kNone_ClipType:
240 SkDEBUGFAIL("Uninitialized Clip.");
241 break;
242 }
243 }
244
asClosedPath(SkPath * path) const245 void asClosedPath(SkPath* path) const {
246 switch (fClipType) {
247 case kPath_ClipType:
248 *path = fPath;
249 path->close();
250 break;
251 case kRect_ClipType:
252 path->reset();
253 path->addRect(fRect);
254 break;
255 case kNone_ClipType:
256 SkDEBUGFAIL("Uninitialized Clip.");
257 break;
258 }
259 }
260
setPath(const SkPath & path)261 void setPath(const SkPath& path) {
262 fClipType = kPath_ClipType;
263 fPath = path;
264 }
265
setRect(const SkRect & rect)266 void setRect(const SkRect& rect) {
267 fClipType = kRect_ClipType;
268 fRect = rect;
269 fPath.reset();
270 }
271
getType() const272 ClipType getType() const { return fClipType; }
273
getBounds(SkRect * bounds) const274 void getBounds(SkRect* bounds) const {
275 switch (fClipType) {
276 case kPath_ClipType:
277 *bounds = fPath.getBounds();
278 break;
279 case kRect_ClipType:
280 *bounds = fRect;
281 break;
282 case kNone_ClipType:
283 SkDEBUGFAIL("Uninitialized Clip.");
284 break;
285 }
286 }
287
288 private:
289 ClipType fClipType;
290 SkPath fPath;
291 SkRect fRect;
292 };
293
294 typedef SkTLList<Clip, 1> ClipList;
295 ClipList fClips;
296 SkBitmap fBmp;
297
298 typedef GM INHERITED;
299 };
300
301 DEF_GM(return new ConvexPolyClip;)
302 }
303