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/SkColorType.h"
14 #include "include/core/SkDocument.h"
15 #include "include/core/SkFlattenable.h"
16 #include "include/core/SkImageFilter.h"
17 #include "include/core/SkImageInfo.h"
18 #include "include/core/SkMatrix.h"
19 #include "include/core/SkPaint.h"
20 #include "include/core/SkPath.h"
21 #include "include/core/SkPictureRecorder.h"
22 #include "include/core/SkPixmap.h"
23 #include "include/core/SkPoint.h"
24 #include "include/core/SkRect.h"
25 #include "include/core/SkRefCnt.h"
26 #include "include/core/SkRegion.h"
27 #include "include/core/SkSamplingOptions.h"
28 #include "include/core/SkScalar.h"
29 #include "include/core/SkShader.h"
30 #include "include/core/SkSize.h"
31 #include "include/core/SkStream.h"
32 #include "include/core/SkSurface.h"
33 #include "include/core/SkTypes.h"
34 #include "include/core/SkVertices.h"
35 #include "include/effects/SkImageFilters.h"
36 #include "include/private/base/SkTemplates.h"
37 #include "include/private/base/SkMalloc.h"
38 #include "include/utils/SkNWayCanvas.h"
39 #include "include/utils/SkPaintFilterCanvas.h"
40 #include "src/core/SkBigPicture.h"
41 #include "src/core/SkImageFilter_Base.h"
42 #include "src/core/SkRecord.h"
43 #include "src/core/SkRecords.h"
44 #include "src/core/SkSpecialImage.h"
45 #include "src/utils/SkCanvasStack.h"
46 #include "tests/Test.h"
47
48 #include <cstddef>
49 #include <initializer_list>
50 #include <memory>
51 #include <utility>
52
53 using namespace skia_private;
54
55 class SkPicture;
56 class SkReadBuffer;
57
58 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
59 #include "include/core/SkColorSpace.h"
60 #include "include/private/SkColorData.h"
61 #endif
62
63 #ifdef SK_SUPPORT_PDF
64 #include "include/docs/SkPDFDocument.h"
65 #endif
66
67 struct ClipRectVisitor {
68 skiatest::Reporter* r;
69
70 template <typename T>
operator ()ClipRectVisitor71 SkRect operator()(const T&) {
72 REPORTER_ASSERT(r, false, "unexpected record");
73 return {1,1,0,0};
74 }
75
operator ()ClipRectVisitor76 SkRect operator()(const SkRecords::ClipRect& op) {
77 return op.rect;
78 }
79 };
80
DEF_TEST(canvas_unsorted_clip,r)81 DEF_TEST(canvas_unsorted_clip, r) {
82 // Test that sorted and unsorted clip rects are forwarded
83 // to picture subclasses and/or devices sorted.
84 //
85 // We can't just test this with an SkCanvas on stack and
86 // SkCanvas::getLocalClipBounds(), as that only tests the raster device,
87 // which sorts these rects itself.
88 for (SkRect clip : {SkRect{0,0,5,5}, SkRect{5,5,0,0}}) {
89 SkPictureRecorder rec;
90 rec.beginRecording({0,0,10,10})
91 ->clipRect(clip);
92 sk_sp<SkPicture> pic = rec.finishRecordingAsPicture();
93
94 auto bp = (const SkBigPicture*)pic.get();
95 const SkRecord* record = bp->record();
96
97 REPORTER_ASSERT(r, record->count() == 1);
98 REPORTER_ASSERT(r, record->visit(0, ClipRectVisitor{r})
99 .isSorted());
100 }
101 }
102
DEF_TEST(canvas_clipbounds,reporter)103 DEF_TEST(canvas_clipbounds, reporter) {
104 SkCanvas canvas(10, 10);
105 SkIRect irect, irect2;
106 SkRect rect, rect2;
107
108 irect = canvas.getDeviceClipBounds();
109 REPORTER_ASSERT(reporter, irect == SkIRect::MakeWH(10, 10));
110 REPORTER_ASSERT(reporter, canvas.getDeviceClipBounds(&irect2));
111 REPORTER_ASSERT(reporter, irect == irect2);
112
113 // local bounds are always too big today -- can we trim them?
114 rect = canvas.getLocalClipBounds();
115 REPORTER_ASSERT(reporter, rect.contains(SkRect::MakeWH(10, 10)));
116 REPORTER_ASSERT(reporter, canvas.getLocalClipBounds(&rect2));
117 REPORTER_ASSERT(reporter, rect == rect2);
118
119 canvas.clipRect(SkRect::MakeEmpty());
120
121 irect = canvas.getDeviceClipBounds();
122 REPORTER_ASSERT(reporter, irect == SkIRect::MakeEmpty());
123 REPORTER_ASSERT(reporter, !canvas.getDeviceClipBounds(&irect2));
124 REPORTER_ASSERT(reporter, irect == irect2);
125
126 rect = canvas.getLocalClipBounds();
127 REPORTER_ASSERT(reporter, rect == SkRect::MakeEmpty());
128 REPORTER_ASSERT(reporter, !canvas.getLocalClipBounds(&rect2));
129 REPORTER_ASSERT(reporter, rect == rect2);
130
131 // Test for wacky sizes that we (historically) have guarded against
132 {
133 SkCanvas c(-10, -20);
134 REPORTER_ASSERT(reporter, c.getBaseLayerSize() == SkISize::MakeEmpty());
135
136 SkPictureRecorder().beginRecording({ 5, 5, 4, 4 });
137 }
138 }
139
140 #ifdef SK_SUPPORT_PDF
141
142 // Will call proc with multiple styles of canvas (recording, raster, pdf)
multi_canvas_driver(int w,int h,F proc)143 template <typename F> static void multi_canvas_driver(int w, int h, F proc) {
144 proc(SkPictureRecorder().beginRecording(SkRect::MakeIWH(w, h)));
145
146 SkNullWStream stream;
147 if (auto doc = SkPDF::MakeDocument(&stream)) {
148 proc(doc->beginPage(SkIntToScalar(w), SkIntToScalar(h)));
149 }
150
151 proc(SkSurface::MakeRasterN32Premul(w, h, nullptr)->getCanvas());
152 }
153
154 const SkIRect gBaseRestrictedR = { 0, 0, 10, 10 };
155
test_restriction(skiatest::Reporter * reporter,SkCanvas * canvas)156 static void test_restriction(skiatest::Reporter* reporter, SkCanvas* canvas) {
157 REPORTER_ASSERT(reporter, canvas->getDeviceClipBounds() == gBaseRestrictedR);
158
159 const SkIRect restrictionR = { 2, 2, 8, 8 };
160 canvas->androidFramework_setDeviceClipRestriction(restrictionR);
161 REPORTER_ASSERT(reporter, canvas->getDeviceClipBounds() == restrictionR);
162
163 const SkIRect clipR = { 4, 4, 6, 6 };
164 canvas->clipRect(SkRect::Make(clipR), SkClipOp::kIntersect);
165 REPORTER_ASSERT(reporter, canvas->getDeviceClipBounds() == clipR);
166 }
167
168 /**
169 * Clip restriction logic exists in the canvas itself, and in various kinds of devices.
170 *
171 * This test explicitly tries to exercise that variety:
172 * - picture : empty device but exercises canvas itself
173 * - pdf : uses SkClipStack in its device (as does SVG and GPU)
174 * - raster : uses SkRasterClip in its device
175 */
DEF_TEST(canvas_clip_restriction,reporter)176 DEF_TEST(canvas_clip_restriction, reporter) {
177 multi_canvas_driver(gBaseRestrictedR.width(), gBaseRestrictedR.height(),
178 [reporter](SkCanvas* canvas) { test_restriction(reporter, canvas); });
179 }
180
DEF_TEST(canvas_empty_clip,reporter)181 DEF_TEST(canvas_empty_clip, reporter) {
182 multi_canvas_driver(50, 50, [reporter](SkCanvas* canvas) {
183 canvas->save();
184 canvas->clipRect({0, 0, 20, 40 });
185 REPORTER_ASSERT(reporter, !canvas->isClipEmpty());
186 canvas->clipRect({30, 0, 50, 40 });
187 REPORTER_ASSERT(reporter, canvas->isClipEmpty());
188 });
189 }
190
191 #endif // SK_SUPPORT_PDF
192
DEF_TEST(CanvasNewRasterTest,reporter)193 DEF_TEST(CanvasNewRasterTest, reporter) {
194 SkImageInfo info = SkImageInfo::MakeN32Premul(10, 10);
195 const size_t minRowBytes = info.minRowBytes();
196 const size_t size = info.computeByteSize(minRowBytes);
197 AutoTMalloc<SkPMColor> storage(size);
198 SkPMColor* baseAddr = storage.get();
199 sk_bzero(baseAddr, size);
200
201 std::unique_ptr<SkCanvas> canvas = SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes);
202 REPORTER_ASSERT(reporter, canvas);
203
204 SkPixmap pmap;
205 const SkPMColor* addr = canvas->peekPixels(&pmap) ? pmap.addr32() : nullptr;
206 REPORTER_ASSERT(reporter, addr);
207 REPORTER_ASSERT(reporter, info == pmap.info());
208 REPORTER_ASSERT(reporter, minRowBytes == pmap.rowBytes());
209 for (int y = 0; y < info.height(); ++y) {
210 for (int x = 0; x < info.width(); ++x) {
211 REPORTER_ASSERT(reporter, 0 == addr[x]);
212 }
213 addr = (const SkPMColor*)((const char*)addr + pmap.rowBytes());
214 }
215
216 // unaligned rowBytes
217 REPORTER_ASSERT(reporter, nullptr == SkCanvas::MakeRasterDirect(info, baseAddr,
218 minRowBytes + 1));
219
220 // now try a deliberately bad info
221 info = info.makeWH(-1, info.height());
222 REPORTER_ASSERT(reporter, nullptr == SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes));
223
224 // too big
225 info = info.makeWH(1 << 30, 1 << 30);
226 REPORTER_ASSERT(reporter, nullptr == SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes));
227
228 // not a valid pixel type
229 info = SkImageInfo::Make(10, 10, kUnknown_SkColorType, info.alphaType());
230 REPORTER_ASSERT(reporter, nullptr == SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes));
231
232 // We should not succeed with a zero-sized valid info
233 info = SkImageInfo::MakeN32Premul(0, 0);
234 canvas = SkCanvas::MakeRasterDirect(info, baseAddr, minRowBytes);
235 REPORTER_ASSERT(reporter, nullptr == canvas);
236 }
237
make_path_from_rect(SkRect r)238 static SkPath make_path_from_rect(SkRect r) {
239 SkPath path;
240 path.addRect(r);
241 return path;
242 }
243
make_region_from_irect(SkIRect r)244 static SkRegion make_region_from_irect(SkIRect r) {
245 SkRegion region;
246 region.setRect(r);
247 return region;
248 }
249
make_n32_bitmap(int w,int h,SkColor c=SK_ColorWHITE)250 static SkBitmap make_n32_bitmap(int w, int h, SkColor c = SK_ColorWHITE) {
251 SkBitmap bm;
252 bm.allocN32Pixels(w, h);
253 bm.eraseColor(c);
254 return bm;
255 }
256
257 // Constants used by test steps
258 static constexpr SkRect kRect = {0, 0, 2, 1};
259 static constexpr SkColor kColor = 0x01020304;
260 static constexpr int kWidth = 2;
261 static constexpr int kHeight = 2;
262
263 using CanvasTest = void (*)(SkCanvas*, skiatest::Reporter*);
264
265 static CanvasTest kCanvasTests[] = {
__anon411bb63c0302() 266 [](SkCanvas* c, skiatest::Reporter* r) {
267 c->translate(SkIntToScalar(1), SkIntToScalar(2));
268 },
__anon411bb63c0402() 269 [](SkCanvas* c, skiatest::Reporter* r) {
270 c->scale(SkIntToScalar(1), SkIntToScalar(2));
271 },
__anon411bb63c0502() 272 [](SkCanvas* c, skiatest::Reporter* r) {
273 c->rotate(SkIntToScalar(1));
274 },
__anon411bb63c0602() 275 [](SkCanvas* c, skiatest::Reporter* r) {
276 c->skew(SkIntToScalar(1), SkIntToScalar(2));
277 },
__anon411bb63c0702() 278 [](SkCanvas* c, skiatest::Reporter* r) {
279 c->concat(SkMatrix::Scale(2, 3));
280 },
__anon411bb63c0802() 281 [](SkCanvas* c, skiatest::Reporter* r) {
282 c->setMatrix(SkMatrix::Scale(2, 3));
283 },
__anon411bb63c0902() 284 [](SkCanvas* c, skiatest::Reporter* r) {
285 c->clipRect(kRect);
286 },
__anon411bb63c0a02() 287 [](SkCanvas* c, skiatest::Reporter* r) {
288 c->clipPath(make_path_from_rect(SkRect{0, 0, 2, 1}));
289 },
__anon411bb63c0b02() 290 [](SkCanvas* c, skiatest::Reporter* r) {
291 c->clipRegion(make_region_from_irect(SkIRect{0, 0, 2, 1}));
292 },
__anon411bb63c0c02() 293 [](SkCanvas* c, skiatest::Reporter* r) {
294 c->clear(kColor);
295 },
__anon411bb63c0d02() 296 [](SkCanvas* c, skiatest::Reporter* r) {
297 int saveCount = c->getSaveCount();
298 c->save();
299 c->translate(SkIntToScalar(1), SkIntToScalar(2));
300 c->clipRegion(make_region_from_irect(SkIRect{0, 0, 2, 1}));
301 c->restore();
302 REPORTER_ASSERT(r, c->getSaveCount() == saveCount);
303 REPORTER_ASSERT(r, c->getTotalMatrix().isIdentity());
304 //REPORTER_ASSERT(reporter, c->getTotalClip() != kTestRegion);
305 },
__anon411bb63c0e02() 306 [](SkCanvas* c, skiatest::Reporter* r) {
307 int saveCount = c->getSaveCount();
308 c->saveLayer(nullptr, nullptr);
309 c->restore();
310 REPORTER_ASSERT(r, c->getSaveCount() == saveCount);
311 },
__anon411bb63c0f02() 312 [](SkCanvas* c, skiatest::Reporter* r) {
313 int saveCount = c->getSaveCount();
314 c->saveLayer(&kRect, nullptr);
315 c->restore();
316 REPORTER_ASSERT(r, c->getSaveCount() == saveCount);
317 },
__anon411bb63c1002() 318 [](SkCanvas* c, skiatest::Reporter* r) {
319 int saveCount = c->getSaveCount();
320 SkPaint p;
321 c->saveLayer(nullptr, &p);
322 c->restore();
323 REPORTER_ASSERT(r, c->getSaveCount() == saveCount);
324 },
__anon411bb63c1102() 325 [](SkCanvas* c, skiatest::Reporter* r) {
326 // This test exercises a functionality in SkPicture that leads to the
327 // recording of restore offset placeholders. This test will trigger an
328 // assertion at playback time if the placeholders are not properly
329 // filled when the recording ends.
330 c->clipRect(kRect);
331 c->clipRegion(make_region_from_irect(SkIRect{0, 0, 2, 1}));
332 },
__anon411bb63c1202() 333 [](SkCanvas* c, skiatest::Reporter* r) {
334 // exercise fix for http://code.google.com/p/skia/issues/detail?id=560
335 // ('SkPathStroker::lineTo() fails for line with length SK_ScalarNearlyZero')
336 SkPaint paint;
337 paint.setStrokeWidth(SkIntToScalar(1));
338 paint.setStyle(SkPaint::kStroke_Style);
339 SkPath path;
340 path.moveTo(SkPoint{ 0, 0 });
341 path.lineTo(SkPoint{ 0, SK_ScalarNearlyZero });
342 path.lineTo(SkPoint{ SkIntToScalar(1), 0 });
343 path.lineTo(SkPoint{ SkIntToScalar(1), SK_ScalarNearlyZero/2 });
344 // test nearly zero length path
345 c->drawPath(path, paint);
346 },
__anon411bb63c1302() 347 [](SkCanvas* c, skiatest::Reporter* r) {
348 SkPictureRecorder recorder;
349 SkCanvas* testCanvas = recorder.beginRecording(SkIntToScalar(kWidth),
350 SkIntToScalar(kHeight));
351 testCanvas->scale(SkIntToScalar(2), SkIntToScalar(1));
352 testCanvas->clipRect(kRect);
353 testCanvas->drawRect(kRect, SkPaint());
354 c->drawPicture(recorder.finishRecordingAsPicture());
355 },
__anon411bb63c1402() 356 [](SkCanvas* c, skiatest::Reporter* r) {
357 int baseSaveCount = c->getSaveCount();
358 int n = c->save();
359 REPORTER_ASSERT(r, baseSaveCount == n);
360 REPORTER_ASSERT(r, baseSaveCount + 1 == c->getSaveCount());
361 c->save();
362 c->save();
363 REPORTER_ASSERT(r, baseSaveCount + 3 == c->getSaveCount());
364 c->restoreToCount(baseSaveCount + 1);
365 REPORTER_ASSERT(r, baseSaveCount + 1 == c->getSaveCount());
366
367 // should this pin to 1, or be a no-op, or crash?
368 c->restoreToCount(0);
369 REPORTER_ASSERT(r, 1 == c->getSaveCount());
370 },
__anon411bb63c1502() 371 [](SkCanvas* c, skiatest::Reporter* r) {
372 // This test step challenges the TestDeferredCanvasStateConsistency
373 // test cases because the opaque paint can trigger an optimization
374 // that discards previously recorded commands. The challenge is to maintain
375 // correct clip and matrix stack state.
376 c->resetMatrix();
377 c->rotate(SkIntToScalar(30));
378 c->save();
379 c->translate(SkIntToScalar(2), SkIntToScalar(1));
380 c->save();
381 c->scale(SkIntToScalar(3), SkIntToScalar(3));
382 SkPaint paint;
383 paint.setColor(0xFFFFFFFF);
384 c->drawPaint(paint);
385 c->restore();
386 c->restore();
387 },
__anon411bb63c1602() 388 [](SkCanvas* c, skiatest::Reporter* r) {
389 // This test step challenges the TestDeferredCanvasStateConsistency
390 // test case because the canvas flush on a deferred canvas will
391 // reset the recording session. The challenge is to maintain correct
392 // clip and matrix stack state on the playback canvas.
393 c->resetMatrix();
394 c->rotate(SkIntToScalar(30));
395 c->save();
396 c->translate(SkIntToScalar(2), SkIntToScalar(1));
397 c->save();
398 c->scale(SkIntToScalar(3), SkIntToScalar(3));
399 c->drawRect(kRect, SkPaint());
400 c->flush();
401 c->restore();
402 c->restore();
403 },
__anon411bb63c1702() 404 [](SkCanvas* c, skiatest::Reporter* r) {
405 SkPoint pts[4];
406 pts[0].set(0, 0);
407 pts[1].set(SkIntToScalar(kWidth), 0);
408 pts[2].set(SkIntToScalar(kWidth), SkIntToScalar(kHeight));
409 pts[3].set(0, SkIntToScalar(kHeight));
410 SkPaint paint;
411 SkBitmap bitmap(make_n32_bitmap(kWidth, kHeight, 0x05060708));
412 paint.setShader(bitmap.makeShader(SkSamplingOptions()));
413 c->drawVertices(
414 SkVertices::MakeCopy(SkVertices::kTriangleFan_VertexMode, 4, pts, pts, nullptr),
415 SkBlendMode::kModulate, paint);
416 }
417 };
418
DEF_TEST(Canvas_bitmap,reporter)419 DEF_TEST(Canvas_bitmap, reporter) {
420 for (const CanvasTest& test : kCanvasTests) {
421 SkBitmap referenceStore = make_n32_bitmap(kWidth, kHeight);
422 SkCanvas referenceCanvas(referenceStore);
423 test(&referenceCanvas, reporter);
424 }
425 }
426
427 #ifdef SK_SUPPORT_PDF
DEF_TEST(Canvas_pdf,reporter)428 DEF_TEST(Canvas_pdf, reporter) {
429 for (const CanvasTest& test : kCanvasTests) {
430 SkNullWStream outStream;
431 if (auto doc = SkPDF::MakeDocument(&outStream)) {
432 SkCanvas* canvas = doc->beginPage(SkIntToScalar(kWidth),
433 SkIntToScalar(kHeight));
434 REPORTER_ASSERT(reporter, canvas);
435 test(canvas, reporter);
436 }
437 }
438 }
439 #endif
440
DEF_TEST(Canvas_SaveState,reporter)441 DEF_TEST(Canvas_SaveState, reporter) {
442 SkCanvas canvas(10, 10);
443 REPORTER_ASSERT(reporter, 1 == canvas.getSaveCount());
444
445 int n = canvas.save();
446 REPORTER_ASSERT(reporter, 1 == n);
447 REPORTER_ASSERT(reporter, 2 == canvas.getSaveCount());
448
449 n = canvas.saveLayer(nullptr, nullptr);
450 REPORTER_ASSERT(reporter, 2 == n);
451 REPORTER_ASSERT(reporter, 3 == canvas.getSaveCount());
452
453 canvas.restore();
454 REPORTER_ASSERT(reporter, 2 == canvas.getSaveCount());
455 canvas.restore();
456 REPORTER_ASSERT(reporter, 1 == canvas.getSaveCount());
457 }
458
DEF_TEST(Canvas_ClipEmptyPath,reporter)459 DEF_TEST(Canvas_ClipEmptyPath, reporter) {
460 SkCanvas canvas(10, 10);
461 canvas.save();
462 SkPath path;
463 canvas.clipPath(path);
464 canvas.restore();
465 canvas.save();
466 path.moveTo(5, 5);
467 canvas.clipPath(path);
468 canvas.restore();
469 canvas.save();
470 path.moveTo(7, 7);
471 canvas.clipPath(path); // should not assert here
472 canvas.restore();
473 }
474
475 namespace {
476
477 class MockFilterCanvas : public SkPaintFilterCanvas {
478 public:
MockFilterCanvas(SkCanvas * canvas)479 MockFilterCanvas(SkCanvas* canvas) : INHERITED(canvas) { }
480
481 protected:
onFilter(SkPaint &) const482 bool onFilter(SkPaint&) const override { return true; }
483
484 private:
485 using INHERITED = SkPaintFilterCanvas;
486 };
487
488 } // anonymous namespace
489
490 // SkPaintFilterCanvas should inherit the initial target canvas state.
DEF_TEST(PaintFilterCanvas_ConsistentState,reporter)491 DEF_TEST(PaintFilterCanvas_ConsistentState, reporter) {
492 SkCanvas canvas(100, 100);
493 canvas.clipRect(SkRect::MakeXYWH(12.7f, 12.7f, 75, 75));
494 canvas.scale(0.5f, 0.75f);
495
496 MockFilterCanvas filterCanvas(&canvas);
497 REPORTER_ASSERT(reporter, canvas.getTotalMatrix() == filterCanvas.getTotalMatrix());
498 REPORTER_ASSERT(reporter, canvas.getLocalClipBounds() == filterCanvas.getLocalClipBounds());
499
500 filterCanvas.clipRect(SkRect::MakeXYWH(30.5f, 30.7f, 100, 100));
501 filterCanvas.scale(0.75f, 0.5f);
502 REPORTER_ASSERT(reporter, canvas.getTotalMatrix() == filterCanvas.getTotalMatrix());
503 REPORTER_ASSERT(reporter, filterCanvas.getLocalClipBounds().contains(canvas.getLocalClipBounds()));
504 }
505
506 ///////////////////////////////////////////////////////////////////////////////////////////////////
507
508 namespace {
509
510 // Subclass that takes a bool*, which it updates in its construct (true) and destructor (false)
511 // to allow the caller to know how long the object is alive.
512 class LifeLineCanvas : public SkCanvas {
513 bool* fLifeLine;
514 public:
LifeLineCanvas(int w,int h,bool * lifeline)515 LifeLineCanvas(int w, int h, bool* lifeline) : SkCanvas(w, h), fLifeLine(lifeline) {
516 *fLifeLine = true;
517 }
~LifeLineCanvas()518 ~LifeLineCanvas() override {
519 *fLifeLine = false;
520 }
521 };
522
523 } // namespace
524
525 // Check that NWayCanvas does NOT try to manage the lifetime of its sub-canvases
DEF_TEST(NWayCanvas,r)526 DEF_TEST(NWayCanvas, r) {
527 const int w = 10;
528 const int h = 10;
529 bool life[2];
530 {
531 LifeLineCanvas c0(w, h, &life[0]);
532 REPORTER_ASSERT(r, life[0]);
533 }
534 REPORTER_ASSERT(r, !life[0]);
535
536
537 std::unique_ptr<SkCanvas> c0 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[0]));
538 std::unique_ptr<SkCanvas> c1 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[1]));
539 REPORTER_ASSERT(r, life[0]);
540 REPORTER_ASSERT(r, life[1]);
541
542 {
543 SkNWayCanvas nway(w, h);
544 nway.addCanvas(c0.get());
545 nway.addCanvas(c1.get());
546 REPORTER_ASSERT(r, life[0]);
547 REPORTER_ASSERT(r, life[1]);
548 }
549 // Now assert that the death of the nway has NOT also killed the sub-canvases
550 REPORTER_ASSERT(r, life[0]);
551 REPORTER_ASSERT(r, life[1]);
552 }
553
554 // Check that CanvasStack DOES manage the lifetime of its sub-canvases
DEF_TEST(CanvasStack,r)555 DEF_TEST(CanvasStack, r) {
556 const int w = 10;
557 const int h = 10;
558 bool life[2];
559 std::unique_ptr<SkCanvas> c0 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[0]));
560 std::unique_ptr<SkCanvas> c1 = std::unique_ptr<SkCanvas>(new LifeLineCanvas(w, h, &life[1]));
561 REPORTER_ASSERT(r, life[0]);
562 REPORTER_ASSERT(r, life[1]);
563
564 {
565 SkCanvasStack stack(w, h);
566 stack.pushCanvas(std::move(c0), {0,0});
567 stack.pushCanvas(std::move(c1), {0,0});
568 REPORTER_ASSERT(r, life[0]);
569 REPORTER_ASSERT(r, life[1]);
570 }
571 // Now assert that the death of the canvasstack has also killed the sub-canvases
572 REPORTER_ASSERT(r, !life[0]);
573 REPORTER_ASSERT(r, !life[1]);
574 }
575
test_cliptype(SkCanvas * canvas,skiatest::Reporter * r)576 static void test_cliptype(SkCanvas* canvas, skiatest::Reporter* r) {
577 REPORTER_ASSERT(r, !canvas->isClipEmpty());
578 REPORTER_ASSERT(r, canvas->isClipRect());
579
580 canvas->save();
581 canvas->clipRect({0, 0, 0, 0});
582 REPORTER_ASSERT(r, canvas->isClipEmpty());
583 REPORTER_ASSERT(r, !canvas->isClipRect());
584 canvas->restore();
585
586 canvas->save();
587 canvas->clipRect({2, 2, 6, 6});
588 REPORTER_ASSERT(r, !canvas->isClipEmpty());
589 REPORTER_ASSERT(r, canvas->isClipRect());
590 canvas->restore();
591
592 canvas->save();
593 canvas->clipRect({2, 2, 6, 6}, SkClipOp::kDifference); // punch a hole in the clip
594 REPORTER_ASSERT(r, !canvas->isClipEmpty());
595 REPORTER_ASSERT(r, !canvas->isClipRect());
596 canvas->restore();
597
598 REPORTER_ASSERT(r, !canvas->isClipEmpty());
599 REPORTER_ASSERT(r, canvas->isClipRect());
600 }
601
DEF_TEST(CanvasClipType,r)602 DEF_TEST(CanvasClipType, r) {
603 // test rasterclip backend
604 test_cliptype(SkSurface::MakeRasterN32Premul(10, 10)->getCanvas(), r);
605
606 #ifdef SK_SUPPORT_PDF
607 // test clipstack backend
608 SkDynamicMemoryWStream stream;
609 if (auto doc = SkPDF::MakeDocument(&stream)) {
610 test_cliptype(doc->beginPage(100, 100), r);
611 }
612 #endif
613 }
614
615 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
DEF_TEST(Canvas_LegacyColorBehavior,r)616 DEF_TEST(Canvas_LegacyColorBehavior, r) {
617 sk_sp<SkColorSpace> cs = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB,
618 SkNamedGamut::kAdobeRGB);
619
620 // Make a Adobe RGB bitmap.
621 SkBitmap bitmap;
622 bitmap.allocPixels(SkImageInfo::MakeN32(1, 1, kOpaque_SkAlphaType, cs));
623 bitmap.eraseColor(0xFF000000);
624
625 // Wrap it in a legacy canvas. Test that the canvas behaves like a legacy canvas.
626 SkCanvas canvas(bitmap, SkCanvas::ColorBehavior::kLegacy);
627 REPORTER_ASSERT(r, !canvas.imageInfo().colorSpace());
628 SkPaint p;
629 p.setColor(SK_ColorRED);
630 canvas.drawIRect(SkIRect::MakeWH(1, 1), p);
631 REPORTER_ASSERT(r, SK_ColorRED == SkSwizzle_BGRA_to_PMColor(*bitmap.getAddr32(0, 0)));
632 }
633 #endif
634
635 namespace {
636
637 class ZeroBoundsImageFilter : public SkImageFilter_Base {
638 public:
Make()639 static sk_sp<SkImageFilter> Make() { return sk_sp<SkImageFilter>(new ZeroBoundsImageFilter); }
640
641 protected:
onFilterImage(const Context &,SkIPoint *) const642 sk_sp<SkSpecialImage> onFilterImage(const Context&, SkIPoint*) const override {
643 return nullptr;
644 }
onFilterNodeBounds(const SkIRect &,const SkMatrix &,MapDirection,const SkIRect * inputRect) const645 SkIRect onFilterNodeBounds(const SkIRect&, const SkMatrix&,
646 MapDirection, const SkIRect* inputRect) const override {
647 return SkIRect::MakeEmpty();
648 }
649
650 private:
651 SK_FLATTENABLE_HOOKS(ZeroBoundsImageFilter)
652
ZeroBoundsImageFilter()653 ZeroBoundsImageFilter() : INHERITED(nullptr, 0, nullptr) {}
654
655 using INHERITED = SkImageFilter_Base;
656 };
657
CreateProc(SkReadBuffer & buffer)658 sk_sp<SkFlattenable> ZeroBoundsImageFilter::CreateProc(SkReadBuffer& buffer) {
659 SkDEBUGFAIL("Should never get here");
660 return nullptr;
661 }
662
663 } // anonymous namespace
664
DEF_TEST(Canvas_SaveLayerWithNullBoundsAndZeroBoundsImageFilter,r)665 DEF_TEST(Canvas_SaveLayerWithNullBoundsAndZeroBoundsImageFilter, r) {
666 SkCanvas canvas(10, 10);
667 SkPaint p;
668 p.setImageFilter(ZeroBoundsImageFilter::Make());
669 // This should not fail any assert.
670 canvas.saveLayer(nullptr, &p);
671 REPORTER_ASSERT(r, canvas.getDeviceClipBounds().isEmpty());
672 canvas.restore();
673 }
674
675 // Test that we don't crash/assert when building a canvas with degenerate coordintes
676 // (esp. big ones, that might invoke tiling).
DEF_TEST(Canvas_degenerate_dimension,reporter)677 DEF_TEST(Canvas_degenerate_dimension, reporter) {
678 // Need a paint that will sneak us past the quickReject in SkCanvas, so we can test the
679 // raster code further downstream.
680 SkPaint paint;
681 paint.setImageFilter(SkImageFilters::Shader(SkShaders::Color(SK_ColorBLACK), nullptr));
682 REPORTER_ASSERT(reporter, !paint.canComputeFastBounds());
683
684 const int big = 100 * 1024; // big enough to definitely trigger tiling
685 const SkISize sizes[] {SkISize{0, big}, {big, 0}, {0, 0}};
686 for (SkISize size : sizes) {
687 SkBitmap bm;
688 bm.setInfo(SkImageInfo::MakeN32Premul(size.width(), size.height()));
689 SkCanvas canvas(bm);
690 canvas.drawRect({0, 0, 100, 90*1024}, paint);
691 }
692 }
693
DEF_TEST(Canvas_ClippedOutImageFilter,reporter)694 DEF_TEST(Canvas_ClippedOutImageFilter, reporter) {
695 SkCanvas canvas(100, 100);
696
697 SkPaint p;
698 p.setColor(SK_ColorGREEN);
699 p.setImageFilter(SkImageFilters::Blur(3.0f, 3.0f, nullptr, nullptr));
700
701 SkRect blurredRect = SkRect::MakeXYWH(60, 10, 30, 30);
702
703 SkMatrix invM;
704 invM.setRotate(-45);
705 invM.mapRect(&blurredRect);
706
707 const SkRect clipRect = SkRect::MakeXYWH(0, 50, 50, 50);
708
709 canvas.clipRect(clipRect);
710
711 canvas.rotate(45);
712 const SkMatrix preCTM = canvas.getTotalMatrix();
713 canvas.drawRect(blurredRect, p);
714 const SkMatrix postCTM = canvas.getTotalMatrix();
715 REPORTER_ASSERT(reporter, preCTM == postCTM);
716 }
717
DEF_TEST(canvas_savelayer_destructor,reporter)718 DEF_TEST(canvas_savelayer_destructor, reporter) {
719 // What should happen in our destructor if we have unbalanced saveLayers?
720
721 SkPMColor pixels[16];
722 const SkImageInfo info = SkImageInfo::MakeN32Premul(4, 4);
723 SkPixmap pm(info, pixels, 4 * sizeof(SkPMColor));
724
725 // check all of the pixel values in pm
726 auto check_pixels = [&](SkColor expected) {
727 const SkPMColor pmc = SkPreMultiplyColor(expected);
728 for (int y = 0; y < pm.info().height(); ++y) {
729 for (int x = 0; x < pm.info().width(); ++x) {
730 if (*pm.addr32(x, y) != pmc) {
731 ERRORF(reporter, "check_pixels_failed");
732 return;
733 }
734 }
735 }
736 };
737
738 auto do_test = [&](int saveCount, int restoreCount) {
739 SkASSERT(restoreCount <= saveCount);
740
741 auto surf = SkSurface::MakeRasterDirect(pm);
742 auto canvas = surf->getCanvas();
743
744 canvas->clear(SK_ColorRED);
745 check_pixels(SK_ColorRED);
746
747 for (int i = 0; i < saveCount; ++i) {
748 canvas->saveLayer(nullptr, nullptr);
749 }
750
751 canvas->clear(SK_ColorBLUE);
752 // so far, we still expect to see the red, since the blue was drawn in a layer
753 check_pixels(SK_ColorRED);
754
755 for (int i = 0; i < restoreCount; ++i) {
756 canvas->restore();
757 }
758 // by returning, we are implicitly deleting the surface, and its associated canvas
759 };
760
761 do_test(1, 1);
762 // since we called restore, we expect to see now see blue
763 check_pixels(SK_ColorBLUE);
764
765 // Now repeat that, but delete the canvas before we restore it
766 do_test(1, 0);
767 // We don't blit the unbalanced saveLayers, so we expect to see red (not the layer's blue)
768 check_pixels(SK_ColorRED);
769
770 // Finally, test with multiple unbalanced saveLayers. This led to a crash in an earlier
771 // implementation (crbug.com/1238731)
772 do_test(2, 0);
773 check_pixels(SK_ColorRED);
774 }
775