1 /*
2 * Copyright 2012 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 "include/core/SkBitmap.h"
9 #include "include/core/SkBlendMode.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkClipOp.h"
12 #include "include/core/SkColor.h"
13 #include "include/core/SkDocument.h"
14 #include "include/core/SkFlattenable.h"
15 #include "include/core/SkImageFilter.h"
16 #include "include/core/SkImageInfo.h"
17 #include "include/core/SkMatrix.h"
18 #include "include/core/SkPaint.h"
19 #include "include/core/SkPath.h"
20 #include "include/core/SkPictureRecorder.h"
21 #include "include/core/SkPixmap.h"
22 #include "include/core/SkPoint.h"
23 #include "include/core/SkRect.h"
24 #include "include/core/SkRefCnt.h"
25 #include "include/core/SkRegion.h"
26 #include "include/core/SkScalar.h"
27 #include "include/core/SkShader.h"
28 #include "include/core/SkSize.h"
29 #include "include/core/SkStream.h"
30 #include "include/core/SkString.h"
31 #include "include/core/SkSurface.h"
32 #include "include/core/SkTypes.h"
33 #include "include/core/SkVertices.h"
34 #include "include/docs/SkPDFDocument.h"
35 #include "include/effects/SkImageFilters.h"
36 #include "include/private/SkMalloc.h"
37 #include "include/private/SkTemplates.h"
38 #include "include/utils/SkNWayCanvas.h"
39 #include "include/utils/SkPaintFilterCanvas.h"
40 #include "src/core/SkClipOpPriv.h"
41 #include "src/core/SkImageFilter_Base.h"
42 #include "src/core/SkSpecialImage.h"
43 #include "src/utils/SkCanvasStack.h"
44 #include "tests/Test.h"
45
46 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
47 #include "include/core/SkColorSpace.h"
48 #include "include/private/SkColorData.h"
49 #endif
50
51 #include <memory>
52 #include <utility>
53
54 class SkReadBuffer;
55
DEF_TEST(canvas_clipbounds,reporter)56 DEF_TEST(canvas_clipbounds, reporter) {
57 SkCanvas canvas(10, 10);
58 SkIRect irect, irect2;
59 SkRect rect, rect2;
60
61 irect = canvas.getDeviceClipBounds();
62 REPORTER_ASSERT(reporter, irect == SkIRect::MakeWH(10, 10));
63 REPORTER_ASSERT(reporter, canvas.getDeviceClipBounds(&irect2));
64 REPORTER_ASSERT(reporter, irect == irect2);
65
66 // local bounds are always too big today -- can we trim them?
67 rect = canvas.getLocalClipBounds();
68 REPORTER_ASSERT(reporter, rect.contains(SkRect::MakeWH(10, 10)));
69 REPORTER_ASSERT(reporter, canvas.getLocalClipBounds(&rect2));
70 REPORTER_ASSERT(reporter, rect == rect2);
71
72 canvas.clipRect(SkRect::MakeEmpty());
73
74 irect = canvas.getDeviceClipBounds();
75 REPORTER_ASSERT(reporter, irect == SkIRect::MakeEmpty());
76 REPORTER_ASSERT(reporter, !canvas.getDeviceClipBounds(&irect2));
77 REPORTER_ASSERT(reporter, irect == irect2);
78
79 rect = canvas.getLocalClipBounds();
80 REPORTER_ASSERT(reporter, rect == SkRect::MakeEmpty());
81 REPORTER_ASSERT(reporter, !canvas.getLocalClipBounds(&rect2));
82 REPORTER_ASSERT(reporter, rect == rect2);
83
84 // Test for wacky sizes that we (historically) have guarded against
85 {
86 SkCanvas c(-10, -20);
87 REPORTER_ASSERT(reporter, c.getBaseLayerSize() == SkISize::MakeEmpty());
88
89 SkPictureRecorder().beginRecording({ 5, 5, 4, 4 });
90 }
91 }
92
93 // Will call proc with multiple styles of canvas (recording, raster, pdf)
multi_canvas_driver(int w,int h,F proc)94 template <typename F> static void multi_canvas_driver(int w, int h, F proc) {
95 proc(SkPictureRecorder().beginRecording(SkRect::MakeIWH(w, h)));
96
97 SkNullWStream stream;
98 if (auto doc = SkPDF::MakeDocument(&stream)) {
99 proc(doc->beginPage(SkIntToScalar(w), SkIntToScalar(h)));
100 }
101
102 proc(SkSurface::MakeRasterN32Premul(w, h, nullptr)->getCanvas());
103 }
104
105 const SkIRect gBaseRestrictedR = { 0, 0, 10, 10 };
106
test_restriction(skiatest::Reporter * reporter,SkCanvas * canvas)107 static void test_restriction(skiatest::Reporter* reporter, SkCanvas* canvas) {
108 REPORTER_ASSERT(reporter, canvas->getDeviceClipBounds() == gBaseRestrictedR);
109
110 const SkIRect restrictionR = { 2, 2, 8, 8 };
111 canvas->androidFramework_setDeviceClipRestriction(restrictionR);
112 REPORTER_ASSERT(reporter, canvas->getDeviceClipBounds() == restrictionR);
113
114 const SkIRect clipR = { 4, 4, 6, 6 };
115 canvas->clipRect(SkRect::Make(clipR), SkClipOp::kIntersect);
116 REPORTER_ASSERT(reporter, canvas->getDeviceClipBounds() == clipR);
117
118 #ifdef SK_SUPPORT_DEPRECATED_CLIPOPS
119 // now test that expanding clipops can't exceed the restriction
120 const SkClipOp expanders[] = {
121 SkClipOp::kUnion_deprecated,
122 SkClipOp::kXOR_deprecated,
123 SkClipOp::kReverseDifference_deprecated,
124 SkClipOp::kReplace_deprecated,
125 };
126
127 const SkRect expandR = { 0, 0, 5, 9 };
128 SkASSERT(!SkRect::Make(restrictionR).contains(expandR));
129
130 for (SkClipOp op : expanders) {
131 canvas->save();
132 canvas->clipRect(expandR, op);
133 REPORTER_ASSERT(reporter, gBaseRestrictedR.contains(canvas->getDeviceClipBounds()));
134 canvas->restore();
135 }
136 #endif
137 }
138
139 /**
140 * Clip restriction logic exists in the canvas itself, and in various kinds of devices.
141 *
142 * This test explicitly tries to exercise that variety:
143 * - picture : empty device but exercises canvas itself
144 * - pdf : uses SkClipStack in its device (as does SVG and GPU)
145 * - raster : uses SkRasterClip in its device
146 */
DEF_TEST(canvas_clip_restriction,reporter)147 DEF_TEST(canvas_clip_restriction, reporter) {
148 multi_canvas_driver(gBaseRestrictedR.width(), gBaseRestrictedR.height(),
149 [reporter](SkCanvas* canvas) { test_restriction(reporter, canvas); });
150 }
151
DEF_TEST(canvas_empty_clip,reporter)152 DEF_TEST(canvas_empty_clip, reporter) {
153 multi_canvas_driver(50, 50, [reporter](SkCanvas* canvas) {
154 canvas->save();
155 canvas->clipRect({0, 0, 20, 40 });
156 REPORTER_ASSERT(reporter, !canvas->isClipEmpty());
157 canvas->clipRect({30, 0, 50, 40 });
158 REPORTER_ASSERT(reporter, canvas->isClipEmpty());
159 });
160 }
161
DEF_TEST(CanvasNewRasterTest,reporter)162 DEF_TEST(CanvasNewRasterTest, reporter) {
163 SkImageInfo info = SkImageInfo::MakeN32Premul(10, 10);
164 const size_t minRowBytes = info.minRowBytes();
165 const size_t size = info.computeByteSize(minRowBytes);
166 SkAutoTMalloc<SkPMColor> storage(size);
167 SkPMColor* baseAddr = storage.get();
168 sk_bzero(baseAddr, size);
169
170 std::unique_ptr<SkCanvas> canvas = SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes);
171 REPORTER_ASSERT(reporter, canvas);
172
173 SkPixmap pmap;
174 const SkPMColor* addr = canvas->peekPixels(&pmap) ? pmap.addr32() : nullptr;
175 REPORTER_ASSERT(reporter, addr);
176 REPORTER_ASSERT(reporter, info == pmap.info());
177 REPORTER_ASSERT(reporter, minRowBytes == pmap.rowBytes());
178 for (int y = 0; y < info.height(); ++y) {
179 for (int x = 0; x < info.width(); ++x) {
180 REPORTER_ASSERT(reporter, 0 == addr[x]);
181 }
182 addr = (const SkPMColor*)((const char*)addr + pmap.rowBytes());
183 }
184
185 // now try a deliberately bad info
186 info = info.makeWH(-1, info.height());
187 REPORTER_ASSERT(reporter, nullptr == SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes));
188
189 // too big
190 info = info.makeWH(1 << 30, 1 << 30);
191 REPORTER_ASSERT(reporter, nullptr == SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes));
192
193 // not a valid pixel type
194 info = SkImageInfo::Make(10, 10, kUnknown_SkColorType, info.alphaType());
195 REPORTER_ASSERT(reporter, nullptr == SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes));
196
197 // We should not succeed with a zero-sized valid info
198 info = SkImageInfo::MakeN32Premul(0, 0);
199 canvas = SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes);
200 REPORTER_ASSERT(reporter, nullptr == canvas);
201 }
202
make_path_from_rect(SkRect r)203 static SkPath make_path_from_rect(SkRect r) {
204 SkPath path;
205 path.addRect(r);
206 return path;
207 }
208
make_region_from_irect(SkIRect r)209 static SkRegion make_region_from_irect(SkIRect r) {
210 SkRegion region;
211 region.setRect(r);
212 return region;
213 }
214
make_n32_bitmap(int w,int h,SkColor c=SK_ColorWHITE)215 static SkBitmap make_n32_bitmap(int w, int h, SkColor c = SK_ColorWHITE) {
216 SkBitmap bm;
217 bm.allocN32Pixels(w, h);
218 bm.eraseColor(c);
219 return bm;
220 }
221
222 // Constants used by test steps
223 static constexpr SkRect kRect = {0, 0, 2, 1};
224 static constexpr SkColor kColor = 0x01020304;
225 static constexpr int kWidth = 2;
226 static constexpr int kHeight = 2;
227
228 using CanvasTest = void (*)(SkCanvas*, skiatest::Reporter*);
229
230 static CanvasTest kCanvasTests[] = {
__anoneeeb2b420302() 231 [](SkCanvas* c, skiatest::Reporter* r) {
232 c->translate(SkIntToScalar(1), SkIntToScalar(2));
233 },
__anoneeeb2b420402() 234 [](SkCanvas* c, skiatest::Reporter* r) {
235 c->scale(SkIntToScalar(1), SkIntToScalar(2));
236 },
__anoneeeb2b420502() 237 [](SkCanvas* c, skiatest::Reporter* r) {
238 c->rotate(SkIntToScalar(1));
239 },
__anoneeeb2b420602() 240 [](SkCanvas* c, skiatest::Reporter* r) {
241 c->skew(SkIntToScalar(1), SkIntToScalar(2));
242 },
__anoneeeb2b420702() 243 [](SkCanvas* c, skiatest::Reporter* r) {
244 c->concat(SkMatrix::MakeScale(2, 3));
245 },
__anoneeeb2b420802() 246 [](SkCanvas* c, skiatest::Reporter* r) {
247 c->setMatrix(SkMatrix::MakeScale(2, 3));
248 },
__anoneeeb2b420902() 249 [](SkCanvas* c, skiatest::Reporter* r) {
250 c->clipRect(kRect);
251 },
__anoneeeb2b420a02() 252 [](SkCanvas* c, skiatest::Reporter* r) {
253 c->clipPath(make_path_from_rect(SkRect{0, 0, 2, 1}));
254 },
__anoneeeb2b420b02() 255 [](SkCanvas* c, skiatest::Reporter* r) {
256 c->clipRegion(make_region_from_irect(SkIRect{0, 0, 2, 1}), kReplace_SkClipOp);
257 },
__anoneeeb2b420c02() 258 [](SkCanvas* c, skiatest::Reporter* r) {
259 c->clear(kColor);
260 },
__anoneeeb2b420d02() 261 [](SkCanvas* c, skiatest::Reporter* r) {
262 int saveCount = c->getSaveCount();
263 c->save();
264 c->translate(SkIntToScalar(1), SkIntToScalar(2));
265 c->clipRegion(make_region_from_irect(SkIRect{0, 0, 2, 1}));
266 c->restore();
267 REPORTER_ASSERT(r, c->getSaveCount() == saveCount);
268 REPORTER_ASSERT(r, c->getTotalMatrix().isIdentity());
269 //REPORTER_ASSERT(reporter, c->getTotalClip() != kTestRegion);
270 },
__anoneeeb2b420e02() 271 [](SkCanvas* c, skiatest::Reporter* r) {
272 int saveCount = c->getSaveCount();
273 c->saveLayer(nullptr, nullptr);
274 c->restore();
275 REPORTER_ASSERT(r, c->getSaveCount() == saveCount);
276 },
__anoneeeb2b420f02() 277 [](SkCanvas* c, skiatest::Reporter* r) {
278 int saveCount = c->getSaveCount();
279 c->saveLayer(&kRect, nullptr);
280 c->restore();
281 REPORTER_ASSERT(r, c->getSaveCount() == saveCount);
282 },
__anoneeeb2b421002() 283 [](SkCanvas* c, skiatest::Reporter* r) {
284 int saveCount = c->getSaveCount();
285 SkPaint p;
286 c->saveLayer(nullptr, &p);
287 c->restore();
288 REPORTER_ASSERT(r, c->getSaveCount() == saveCount);
289 },
__anoneeeb2b421102() 290 [](SkCanvas* c, skiatest::Reporter* r) {
291 // This test exercises a functionality in SkPicture that leads to the
292 // recording of restore offset placeholders. This test will trigger an
293 // assertion at playback time if the placeholders are not properly
294 // filled when the recording ends.
295 c->clipRect(kRect);
296 c->clipRegion(make_region_from_irect(SkIRect{0, 0, 2, 1}));
297 },
__anoneeeb2b421202() 298 [](SkCanvas* c, skiatest::Reporter* r) {
299 // exercise fix for http://code.google.com/p/skia/issues/detail?id=560
300 // ('SkPathStroker::lineTo() fails for line with length SK_ScalarNearlyZero')
301 SkPaint paint;
302 paint.setStrokeWidth(SkIntToScalar(1));
303 paint.setStyle(SkPaint::kStroke_Style);
304 SkPath path;
305 path.moveTo(SkPoint{ 0, 0 });
306 path.lineTo(SkPoint{ 0, SK_ScalarNearlyZero });
307 path.lineTo(SkPoint{ SkIntToScalar(1), 0 });
308 path.lineTo(SkPoint{ SkIntToScalar(1), SK_ScalarNearlyZero/2 });
309 // test nearly zero length path
310 c->drawPath(path, paint);
311 },
__anoneeeb2b421302() 312 [](SkCanvas* c, skiatest::Reporter* r) {
313 SkPictureRecorder recorder;
314 SkCanvas* testCanvas = recorder.beginRecording(
315 SkIntToScalar(kWidth), SkIntToScalar(kHeight), nullptr, 0);
316 testCanvas->scale(SkIntToScalar(2), SkIntToScalar(1));
317 testCanvas->clipRect(kRect);
318 testCanvas->drawRect(kRect, SkPaint());
319 c->drawPicture(recorder.finishRecordingAsPicture());
320 },
__anoneeeb2b421402() 321 [](SkCanvas* c, skiatest::Reporter* r) {
322 int baseSaveCount = c->getSaveCount();
323 int n = c->save();
324 REPORTER_ASSERT(r, baseSaveCount == n);
325 REPORTER_ASSERT(r, baseSaveCount + 1 == c->getSaveCount());
326 c->save();
327 c->save();
328 REPORTER_ASSERT(r, baseSaveCount + 3 == c->getSaveCount());
329 c->restoreToCount(baseSaveCount + 1);
330 REPORTER_ASSERT(r, baseSaveCount + 1 == c->getSaveCount());
331
332 // should this pin to 1, or be a no-op, or crash?
333 c->restoreToCount(0);
334 REPORTER_ASSERT(r, 1 == c->getSaveCount());
335 },
__anoneeeb2b421502() 336 [](SkCanvas* c, skiatest::Reporter* r) {
337 // This test step challenges the TestDeferredCanvasStateConsistency
338 // test cases because the opaque paint can trigger an optimization
339 // that discards previously recorded commands. The challenge is to maintain
340 // correct clip and matrix stack state.
341 c->resetMatrix();
342 c->rotate(SkIntToScalar(30));
343 c->save();
344 c->translate(SkIntToScalar(2), SkIntToScalar(1));
345 c->save();
346 c->scale(SkIntToScalar(3), SkIntToScalar(3));
347 SkPaint paint;
348 paint.setColor(0xFFFFFFFF);
349 c->drawPaint(paint);
350 c->restore();
351 c->restore();
352 },
__anoneeeb2b421602() 353 [](SkCanvas* c, skiatest::Reporter* r) {
354 // This test step challenges the TestDeferredCanvasStateConsistency
355 // test case because the canvas flush on a deferred canvas will
356 // reset the recording session. The challenge is to maintain correct
357 // clip and matrix stack state on the playback canvas.
358 c->resetMatrix();
359 c->rotate(SkIntToScalar(30));
360 c->save();
361 c->translate(SkIntToScalar(2), SkIntToScalar(1));
362 c->save();
363 c->scale(SkIntToScalar(3), SkIntToScalar(3));
364 c->drawRect(kRect, SkPaint());
365 c->flush();
366 c->restore();
367 c->restore();
368 },
__anoneeeb2b421702() 369 [](SkCanvas* c, skiatest::Reporter* r) {
370 SkPoint pts[4];
371 pts[0].set(0, 0);
372 pts[1].set(SkIntToScalar(kWidth), 0);
373 pts[2].set(SkIntToScalar(kWidth), SkIntToScalar(kHeight));
374 pts[3].set(0, SkIntToScalar(kHeight));
375 SkPaint paint;
376 SkBitmap bitmap(make_n32_bitmap(kWidth, kHeight, 0x05060708));
377 paint.setShader(bitmap.makeShader());
378 c->drawVertices(
379 SkVertices::MakeCopy(SkVertices::kTriangleFan_VertexMode, 4, pts, pts, nullptr),
380 SkBlendMode::kModulate, paint);
381 }
382 };
383
DEF_TEST(Canvas_bitmap,reporter)384 DEF_TEST(Canvas_bitmap, reporter) {
385 for (const CanvasTest& test : kCanvasTests) {
386 SkBitmap referenceStore = make_n32_bitmap(kWidth, kHeight);
387 SkCanvas referenceCanvas(referenceStore);
388 test(&referenceCanvas, reporter);
389 }
390 }
391
DEF_TEST(Canvas_pdf,reporter)392 DEF_TEST(Canvas_pdf, reporter) {
393 for (const CanvasTest& test : kCanvasTests) {
394 SkNullWStream outStream;
395 if (auto doc = SkPDF::MakeDocument(&outStream)) {
396 SkCanvas* canvas = doc->beginPage(SkIntToScalar(kWidth),
397 SkIntToScalar(kHeight));
398 REPORTER_ASSERT(reporter, canvas);
399 test(canvas, reporter);
400 }
401 }
402 }
403
DEF_TEST(Canvas_SaveState,reporter)404 DEF_TEST(Canvas_SaveState, reporter) {
405 SkCanvas canvas(10, 10);
406 REPORTER_ASSERT(reporter, 1 == canvas.getSaveCount());
407
408 int n = canvas.save();
409 REPORTER_ASSERT(reporter, 1 == n);
410 REPORTER_ASSERT(reporter, 2 == canvas.getSaveCount());
411
412 n = canvas.saveLayer(nullptr, nullptr);
413 REPORTER_ASSERT(reporter, 2 == n);
414 REPORTER_ASSERT(reporter, 3 == canvas.getSaveCount());
415
416 canvas.restore();
417 REPORTER_ASSERT(reporter, 2 == canvas.getSaveCount());
418 canvas.restore();
419 REPORTER_ASSERT(reporter, 1 == canvas.getSaveCount());
420 }
421
DEF_TEST(Canvas_ClipEmptyPath,reporter)422 DEF_TEST(Canvas_ClipEmptyPath, reporter) {
423 SkCanvas canvas(10, 10);
424 canvas.save();
425 SkPath path;
426 canvas.clipPath(path);
427 canvas.restore();
428 canvas.save();
429 path.moveTo(5, 5);
430 canvas.clipPath(path);
431 canvas.restore();
432 canvas.save();
433 path.moveTo(7, 7);
434 canvas.clipPath(path); // should not assert here
435 canvas.restore();
436 }
437
438 namespace {
439
440 class MockFilterCanvas : public SkPaintFilterCanvas {
441 public:
MockFilterCanvas(SkCanvas * canvas)442 MockFilterCanvas(SkCanvas* canvas) : INHERITED(canvas) { }
443
444 protected:
onFilter(SkPaint &) const445 bool onFilter(SkPaint&) const override { return true; }
446
447 private:
448 typedef SkPaintFilterCanvas INHERITED;
449 };
450
451 } // anonymous namespace
452
453 // SkPaintFilterCanvas should inherit the initial target canvas state.
DEF_TEST(PaintFilterCanvas_ConsistentState,reporter)454 DEF_TEST(PaintFilterCanvas_ConsistentState, reporter) {
455 SkCanvas canvas(100, 100);
456 canvas.clipRect(SkRect::MakeXYWH(12.7f, 12.7f, 75, 75));
457 canvas.scale(0.5f, 0.75f);
458
459 MockFilterCanvas filterCanvas(&canvas);
460 REPORTER_ASSERT(reporter, canvas.getTotalMatrix() == filterCanvas.getTotalMatrix());
461 REPORTER_ASSERT(reporter, canvas.getLocalClipBounds() == filterCanvas.getLocalClipBounds());
462
463 filterCanvas.clipRect(SkRect::MakeXYWH(30.5f, 30.7f, 100, 100));
464 filterCanvas.scale(0.75f, 0.5f);
465 REPORTER_ASSERT(reporter, canvas.getTotalMatrix() == filterCanvas.getTotalMatrix());
466 REPORTER_ASSERT(reporter, filterCanvas.getLocalClipBounds().contains(canvas.getLocalClipBounds()));
467 }
468
469 ///////////////////////////////////////////////////////////////////////////////////////////////////
470
471 namespace {
472
473 // Subclass that takes a bool*, which it updates in its construct (true) and destructor (false)
474 // to allow the caller to know how long the object is alive.
475 class LifeLineCanvas : public SkCanvas {
476 bool* fLifeLine;
477 public:
LifeLineCanvas(int w,int h,bool * lifeline)478 LifeLineCanvas(int w, int h, bool* lifeline) : SkCanvas(w, h), fLifeLine(lifeline) {
479 *fLifeLine = true;
480 }
~LifeLineCanvas()481 ~LifeLineCanvas() {
482 *fLifeLine = false;
483 }
484 };
485
486 }
487
488 // Check that NWayCanvas does NOT try to manage the lifetime of its sub-canvases
DEF_TEST(NWayCanvas,r)489 DEF_TEST(NWayCanvas, r) {
490 const int w = 10;
491 const int h = 10;
492 bool life[2];
493 {
494 LifeLineCanvas c0(w, h, &life[0]);
495 REPORTER_ASSERT(r, life[0]);
496 }
497 REPORTER_ASSERT(r, !life[0]);
498
499
500 std::unique_ptr<SkCanvas> c0 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[0]));
501 std::unique_ptr<SkCanvas> c1 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[1]));
502 REPORTER_ASSERT(r, life[0]);
503 REPORTER_ASSERT(r, life[1]);
504
505 {
506 SkNWayCanvas nway(w, h);
507 nway.addCanvas(c0.get());
508 nway.addCanvas(c1.get());
509 REPORTER_ASSERT(r, life[0]);
510 REPORTER_ASSERT(r, life[1]);
511 }
512 // Now assert that the death of the nway has NOT also killed the sub-canvases
513 REPORTER_ASSERT(r, life[0]);
514 REPORTER_ASSERT(r, life[1]);
515 }
516
517 // Check that CanvasStack DOES manage the lifetime of its sub-canvases
DEF_TEST(CanvasStack,r)518 DEF_TEST(CanvasStack, r) {
519 const int w = 10;
520 const int h = 10;
521 bool life[2];
522 std::unique_ptr<SkCanvas> c0 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[0]));
523 std::unique_ptr<SkCanvas> c1 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[1]));
524 REPORTER_ASSERT(r, life[0]);
525 REPORTER_ASSERT(r, life[1]);
526
527 {
528 SkCanvasStack stack(w, h);
529 stack.pushCanvas(std::move(c0), {0,0});
530 stack.pushCanvas(std::move(c1), {0,0});
531 REPORTER_ASSERT(r, life[0]);
532 REPORTER_ASSERT(r, life[1]);
533 }
534 // Now assert that the death of the canvasstack has also killed the sub-canvases
535 REPORTER_ASSERT(r, !life[0]);
536 REPORTER_ASSERT(r, !life[1]);
537 }
538
test_cliptype(SkCanvas * canvas,skiatest::Reporter * r)539 static void test_cliptype(SkCanvas* canvas, skiatest::Reporter* r) {
540 REPORTER_ASSERT(r, !canvas->isClipEmpty());
541 REPORTER_ASSERT(r, canvas->isClipRect());
542
543 canvas->save();
544 canvas->clipRect({0, 0, 0, 0});
545 REPORTER_ASSERT(r, canvas->isClipEmpty());
546 REPORTER_ASSERT(r, !canvas->isClipRect());
547 canvas->restore();
548
549 canvas->save();
550 canvas->clipRect({2, 2, 6, 6});
551 REPORTER_ASSERT(r, !canvas->isClipEmpty());
552 REPORTER_ASSERT(r, canvas->isClipRect());
553 canvas->restore();
554
555 canvas->save();
556 canvas->clipRect({2, 2, 6, 6}, SkClipOp::kDifference); // punch a hole in the clip
557 REPORTER_ASSERT(r, !canvas->isClipEmpty());
558 REPORTER_ASSERT(r, !canvas->isClipRect());
559 canvas->restore();
560
561 REPORTER_ASSERT(r, !canvas->isClipEmpty());
562 REPORTER_ASSERT(r, canvas->isClipRect());
563 }
564
DEF_TEST(CanvasClipType,r)565 DEF_TEST(CanvasClipType, r) {
566 // test rasterclip backend
567 test_cliptype(SkSurface::MakeRasterN32Premul(10, 10)->getCanvas(), r);
568
569 // test clipstack backend
570 SkDynamicMemoryWStream stream;
571 if (auto doc = SkPDF::MakeDocument(&stream)) {
572 test_cliptype(doc->beginPage(100, 100), r);
573 }
574 }
575
576 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
DEF_TEST(Canvas_LegacyColorBehavior,r)577 DEF_TEST(Canvas_LegacyColorBehavior, r) {
578 sk_sp<SkColorSpace> cs = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB,
579 SkNamedGamut::kAdobeRGB);
580
581 // Make a Adobe RGB bitmap.
582 SkBitmap bitmap;
583 bitmap.allocPixels(SkImageInfo::MakeN32(1, 1, kOpaque_SkAlphaType, cs));
584 bitmap.eraseColor(0xFF000000);
585
586 // Wrap it in a legacy canvas. Test that the canvas behaves like a legacy canvas.
587 SkCanvas canvas(bitmap, SkCanvas::ColorBehavior::kLegacy);
588 REPORTER_ASSERT(r, !canvas.imageInfo().colorSpace());
589 SkPaint p;
590 p.setColor(SK_ColorRED);
591 canvas.drawIRect(SkIRect::MakeWH(1, 1), p);
592 REPORTER_ASSERT(r, SK_ColorRED == SkSwizzle_BGRA_to_PMColor(*bitmap.getAddr32(0, 0)));
593 }
594 #endif
595
596 namespace {
597
598 class ZeroBoundsImageFilter : public SkImageFilter_Base {
599 public:
Make()600 static sk_sp<SkImageFilter> Make() { return sk_sp<SkImageFilter>(new ZeroBoundsImageFilter); }
601
602 protected:
onFilterImage(const Context &,SkIPoint *) const603 sk_sp<SkSpecialImage> onFilterImage(const Context&, SkIPoint*) const override {
604 return nullptr;
605 }
onFilterNodeBounds(const SkIRect &,const SkMatrix &,MapDirection,const SkIRect * inputRect) const606 SkIRect onFilterNodeBounds(const SkIRect&, const SkMatrix&,
607 MapDirection, const SkIRect* inputRect) const override {
608 return SkIRect::MakeEmpty();
609 }
610
611 private:
612 SK_FLATTENABLE_HOOKS(ZeroBoundsImageFilter)
613
ZeroBoundsImageFilter()614 ZeroBoundsImageFilter() : INHERITED(nullptr, 0, nullptr) {}
615
616 typedef SkImageFilter_Base INHERITED;
617 };
618
CreateProc(SkReadBuffer & buffer)619 sk_sp<SkFlattenable> ZeroBoundsImageFilter::CreateProc(SkReadBuffer& buffer) {
620 SkDEBUGFAIL("Should never get here");
621 return nullptr;
622 }
623
624 } // anonymous namespace
625
DEF_TEST(Canvas_SaveLayerWithNullBoundsAndZeroBoundsImageFilter,r)626 DEF_TEST(Canvas_SaveLayerWithNullBoundsAndZeroBoundsImageFilter, r) {
627 SkCanvas canvas(10, 10);
628 SkPaint p;
629 p.setImageFilter(ZeroBoundsImageFilter::Make());
630 // This should not fail any assert.
631 canvas.saveLayer(nullptr, &p);
632 REPORTER_ASSERT(r, canvas.getDeviceClipBounds().isEmpty());
633 canvas.restore();
634 }
635
636 // Test that we don't crash/assert when building a canvas with degenerate coordintes
637 // (esp. big ones, that might invoke tiling).
DEF_TEST(Canvas_degenerate_dimension,reporter)638 DEF_TEST(Canvas_degenerate_dimension, reporter) {
639 // Need a paint that will sneak us past the quickReject in SkCanvas, so we can test the
640 // raster code further downstream.
641 SkPaint paint;
642 paint.setImageFilter(SkImageFilters::Paint(SkPaint(), nullptr));
643 REPORTER_ASSERT(reporter, !paint.canComputeFastBounds());
644
645 const int big = 100 * 1024; // big enough to definitely trigger tiling
646 const SkISize sizes[] {SkISize{0, big}, {big, 0}, {0, 0}};
647 for (SkISize size : sizes) {
648 SkBitmap bm;
649 bm.setInfo(SkImageInfo::MakeN32Premul(size.width(), size.height()));
650 SkCanvas canvas(bm);
651 canvas.drawRect({0, 0, 100, 90*1024}, paint);
652 }
653 }
654
DEF_TEST(Canvas_ClippedOutImageFilter,reporter)655 DEF_TEST(Canvas_ClippedOutImageFilter, reporter) {
656 SkCanvas canvas(100, 100);
657
658 SkPaint p;
659 p.setColor(SK_ColorGREEN);
660 p.setImageFilter(SkImageFilters::Blur(3.0f, 3.0f, nullptr, nullptr));
661
662 SkRect blurredRect = SkRect::MakeXYWH(60, 10, 30, 30);
663
664 SkMatrix invM;
665 invM.setRotate(-45);
666 invM.mapRect(&blurredRect);
667
668 const SkRect clipRect = SkRect::MakeXYWH(0, 50, 50, 50);
669
670 canvas.clipRect(clipRect);
671
672 canvas.rotate(45);
673 const SkMatrix preCTM = canvas.getTotalMatrix();
674 canvas.drawRect(blurredRect, p);
675 const SkMatrix postCTM = canvas.getTotalMatrix();
676 REPORTER_ASSERT(reporter, preCTM == postCTM);
677 }
678
679