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/gm.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkFilterQuality.h"
13 #include "include/core/SkImage.h"
14 #include "include/core/SkImageFilter.h"
15 #include "include/core/SkMatrix.h"
16 #include "include/core/SkPaint.h"
17 #include "include/core/SkPath.h"
18 #include "include/core/SkPicture.h"
19 #include "include/core/SkPictureRecorder.h"
20 #include "include/core/SkPoint.h"
21 #include "include/core/SkRRect.h"
22 #include "include/core/SkRect.h"
23 #include "include/core/SkRefCnt.h"
24 #include "include/core/SkScalar.h"
25 #include "include/core/SkSize.h"
26 #include "include/core/SkString.h"
27 #include "include/core/SkSurface.h"
28 #include "include/core/SkTypes.h"
29 #include "include/effects/SkImageFilters.h"
30 #include "include/private/SkTArray.h"
31
32 #include <utility>
33
34 namespace skiagm {
35
36 // Each method of this type must draw its geometry inside 'r' using 'p'
37 typedef void(*drawMth)(SkCanvas* canvas, const SkRect& r, const SkPaint& p);
38
draw_rect(SkCanvas * canvas,const SkRect & r,const SkPaint & p)39 static void draw_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
40 canvas->drawRect(r, p);
41 }
42
draw_oval(SkCanvas * canvas,const SkRect & r,const SkPaint & p)43 static void draw_oval(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
44 canvas->drawOval(r, p);
45 }
46
draw_rrect(SkCanvas * canvas,const SkRect & r,const SkPaint & p)47 static void draw_rrect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
48 SkScalar xRad = r.width() / 4.0f;
49 SkScalar yRad = r.height() / 4.0f;
50
51 SkRRect rr;
52 rr.setRectXY(r, xRad, yRad);
53 canvas->drawRRect(rr, p);
54 }
55
draw_drrect(SkCanvas * canvas,const SkRect & r,const SkPaint & p)56 static void draw_drrect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
57 SkScalar xRad = r.width() / 4.0f;
58 SkScalar yRad = r.height() / 4.0f;
59
60 SkRRect outer;
61 outer.setRectXY(r, xRad, yRad);
62 SkRRect inner = outer;
63 inner.inset(xRad, yRad);
64 canvas->drawDRRect(outer, inner, p);
65 }
66
draw_path(SkCanvas * canvas,const SkRect & r,const SkPaint & p)67 static void draw_path(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
68 SkPath path;
69
70 path.moveTo(r.fLeft, r.fTop);
71 path.lineTo(r.fLeft, r.fBottom);
72 path.lineTo(r.fRight, r.fBottom);
73 path.close();
74
75 canvas->drawPath(path, p);
76 }
77
draw_points(SkCanvas * canvas,const SkRect & r,const SkPaint & p)78 static void draw_points(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
79 SkPoint pts0[2] = { { r.fLeft, r.fTop }, { r.fRight, r.fBottom } };
80 SkPoint pts1[2] = { { r.fLeft, r.fBottom }, { r.fRight, r.fTop } };
81
82 canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts0, p);
83 canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts1, p);
84 }
85
draw_bitmap(SkCanvas * canvas,const SkRect & r,const SkPaint & p)86 static void draw_bitmap(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
87 SkBitmap bm;
88
89 bm.allocN32Pixels(64, 64);
90 SkCanvas temp(bm);
91 temp.clear(SK_ColorMAGENTA);
92
93 canvas->drawBitmapRect(bm, r, &p);
94 }
95
96 constexpr drawMth gDrawMthds[] = {
97 draw_rect, draw_oval, draw_rrect, draw_drrect, draw_path, draw_points, draw_bitmap
98 };
99
add_paint(SkTArray<SkPaint> * paints,sk_sp<SkImageFilter> filter)100 static void add_paint(SkTArray<SkPaint>* paints, sk_sp<SkImageFilter> filter) {
101 SkPaint& p = paints->push_back();
102 p.setImageFilter(std::move(filter));
103 SkASSERT(p.canComputeFastBounds());
104 }
105
106 // Create a selection of imagefilter-based paints to test
create_paints(SkTArray<SkPaint> * paints,sk_sp<SkImageFilter> source)107 static void create_paints(SkTArray<SkPaint>* paints, sk_sp<SkImageFilter> source) {
108 {
109 SkMatrix scale;
110 scale.setScale(2.0f, 2.0f);
111
112 sk_sp<SkImageFilter> scaleMIF(
113 SkImageFilters::MatrixTransform(scale, kLow_SkFilterQuality, source));
114
115 add_paint(paints, std::move(scaleMIF));
116 }
117
118 {
119 SkMatrix rot;
120 rot.setRotate(-33.3f);
121
122 sk_sp<SkImageFilter> rotMIF(
123 SkImageFilters::MatrixTransform(rot, kLow_SkFilterQuality, source));
124
125 add_paint(paints, std::move(rotMIF));
126 }
127
128 {
129 SkRect src = SkRect::MakeXYWH(20, 20, 10, 10);
130 SkRect dst = SkRect::MakeXYWH(30, 30, 30, 30);
131 sk_sp<SkImageFilter> tileIF(SkImageFilters::Tile(src, dst, nullptr));
132
133 add_paint(paints, std::move(tileIF));
134 }
135
136 {
137 sk_sp<SkImageFilter> dsif =
138 SkImageFilters::DropShadow(10.0f, 10.0f, 3.0f, 3.0f, SK_ColorRED, source);
139
140 add_paint(paints, std::move(dsif));
141 }
142
143 {
144 sk_sp<SkImageFilter> dsif =
145 SkImageFilters::DropShadowOnly(27.0f, 27.0f, 3.0f, 3.0f, SK_ColorRED, source);
146
147 add_paint(paints, std::move(dsif));
148 }
149
150 add_paint(paints, SkImageFilters::Blur(3, 3, source));
151 add_paint(paints, SkImageFilters::Offset(15, 15, source));
152 }
153
154 // This GM visualizes the fast bounds for various combinations of geometry
155 // and image filter
156 class ImageFilterFastBoundGM : public GM {
157 public:
ImageFilterFastBoundGM()158 ImageFilterFastBoundGM() {
159 this->setBGColor(0xFFCCCCCC);
160 }
161
162 protected:
163 static constexpr int kTileWidth = 100;
164 static constexpr int kTileHeight = 100;
165 static constexpr int kNumVertTiles = 7;
166 static constexpr int kNumXtraCols = 2;
167
onShortName()168 SkString onShortName() override { return SkString("filterfastbounds"); }
169
onISize()170 SkISize onISize() override {
171 return SkISize::Make((SK_ARRAY_COUNT(gDrawMthds) + kNumXtraCols) * kTileWidth,
172 kNumVertTiles * kTileHeight);
173 }
174
draw_geom_with_paint(drawMth draw,const SkIPoint & off,SkCanvas * canvas,const SkPaint & p)175 static void draw_geom_with_paint(drawMth draw, const SkIPoint& off,
176 SkCanvas* canvas, const SkPaint& p) {
177 SkPaint redStroked;
178 redStroked.setColor(SK_ColorRED);
179 redStroked.setStyle(SkPaint::kStroke_Style);
180
181 SkPaint blueStroked;
182 blueStroked.setColor(SK_ColorBLUE);
183 blueStroked.setStyle(SkPaint::kStroke_Style);
184
185 const SkRect r = SkRect::MakeLTRB(20, 20, 30, 30);
186 SkRect storage;
187
188 canvas->save();
189 canvas->translate(SkIntToScalar(off.fX), SkIntToScalar(off.fY));
190 canvas->scale(1.5f, 1.5f);
191
192 const SkRect& fastBound = p.computeFastBounds(r, &storage);
193
194 canvas->save();
195 canvas->clipRect(fastBound);
196 (*draw)(canvas, r, p);
197 canvas->restore();
198
199 canvas->drawRect(r, redStroked);
200 canvas->drawRect(fastBound, blueStroked);
201 canvas->restore();
202 }
203
draw_savelayer_with_paint(const SkIPoint & off,SkCanvas * canvas,const SkPaint & p)204 static void draw_savelayer_with_paint(const SkIPoint& off,
205 SkCanvas* canvas,
206 const SkPaint& p) {
207 SkPaint redStroked;
208 redStroked.setColor(SK_ColorRED);
209 redStroked.setStyle(SkPaint::kStroke_Style);
210
211 SkPaint blueStroked;
212 blueStroked.setColor(SK_ColorBLUE);
213 blueStroked.setStyle(SkPaint::kStroke_Style);
214
215 const SkRect bounds = SkRect::MakeWH(10, 10);
216 SkRect storage;
217
218 canvas->save();
219 canvas->translate(30, 30);
220 canvas->translate(SkIntToScalar(off.fX), SkIntToScalar(off.fY));
221 canvas->scale(1.5f, 1.5f);
222
223 const SkRect& fastBound = p.computeFastBounds(bounds, &storage);
224
225 canvas->saveLayer(&fastBound, &p);
226 canvas->restore();
227
228 canvas->drawRect(bounds, redStroked);
229 canvas->drawRect(fastBound, blueStroked);
230 canvas->restore();
231 }
232
onDraw(SkCanvas * canvas)233 void onDraw(SkCanvas* canvas) override {
234
235 SkPaint blackFill;
236
237 //-----------
238 // Normal paints (no source)
239 SkTArray<SkPaint> paints;
240 create_paints(&paints, nullptr);
241
242 //-----------
243 // Paints with a PictureImageFilter as a source
244 sk_sp<SkPicture> pic;
245
246 {
247 SkPictureRecorder rec;
248
249 SkCanvas* c = rec.beginRecording(10, 10);
250 c->drawRect(SkRect::MakeWH(10, 10), blackFill);
251 pic = rec.finishRecordingAsPicture();
252 }
253
254 SkTArray<SkPaint> pifPaints;
255 create_paints(&pifPaints, SkImageFilters::Picture(pic));
256
257 //-----------
258 // Paints with a SkImageSource as a source
259
260 auto surface(SkSurface::MakeRasterN32Premul(10, 10));
261 {
262 SkPaint p;
263 SkCanvas* temp = surface->getCanvas();
264 temp->clear(SK_ColorYELLOW);
265 p.setColor(SK_ColorBLUE);
266 temp->drawRect(SkRect::MakeLTRB(5, 5, 10, 10), p);
267 p.setColor(SK_ColorGREEN);
268 temp->drawRect(SkRect::MakeLTRB(5, 0, 10, 5), p);
269 }
270
271 sk_sp<SkImage> image(surface->makeImageSnapshot());
272 sk_sp<SkImageFilter> imageSource(SkImageFilters::Image(std::move(image)));
273 SkTArray<SkPaint> bmsPaints;
274 create_paints(&bmsPaints, std::move(imageSource));
275
276 //-----------
277 SkASSERT(paints.count() == kNumVertTiles);
278 SkASSERT(paints.count() == pifPaints.count());
279 SkASSERT(paints.count() == bmsPaints.count());
280
281 // horizontal separators
282 for (int i = 1; i < paints.count(); ++i) {
283 canvas->drawLine(0,
284 i*SkIntToScalar(kTileHeight),
285 SkIntToScalar((SK_ARRAY_COUNT(gDrawMthds) + kNumXtraCols)*kTileWidth),
286 i*SkIntToScalar(kTileHeight),
287 blackFill);
288 }
289 // vertical separators
290 for (int i = 0; i < (int)SK_ARRAY_COUNT(gDrawMthds) + kNumXtraCols; ++i) {
291 canvas->drawLine(SkIntToScalar(i * kTileWidth),
292 0,
293 SkIntToScalar(i * kTileWidth),
294 SkIntToScalar(paints.count() * kTileWidth),
295 blackFill);
296 }
297
298 // A column of saveLayers with PictureImageFilters
299 for (int i = 0; i < pifPaints.count(); ++i) {
300 draw_savelayer_with_paint(SkIPoint::Make(0, i*kTileHeight),
301 canvas, pifPaints[i]);
302 }
303
304 // A column of saveLayers with BitmapSources
305 for (int i = 0; i < pifPaints.count(); ++i) {
306 draw_savelayer_with_paint(SkIPoint::Make(kTileWidth, i*kTileHeight),
307 canvas, bmsPaints[i]);
308 }
309
310 // Multiple columns with different geometry
311 for (int i = 0; i < (int)SK_ARRAY_COUNT(gDrawMthds); ++i) {
312 for (int j = 0; j < paints.count(); ++j) {
313 draw_geom_with_paint(*gDrawMthds[i],
314 SkIPoint::Make((i+kNumXtraCols) * kTileWidth, j*kTileHeight),
315 canvas, paints[j]);
316 }
317 }
318
319 }
320
321 private:
322 typedef GM INHERITED;
323 };
324
325 //////////////////////////////////////////////////////////////////////////////
326
327 DEF_GM(return new ImageFilterFastBoundGM;)
328 }
329