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 <cmath>
9 #include "SkRRect.h"
10 #include "SkScopeExit.h"
11 #include "SkBuffer.h"
12 #include "SkMalloc.h"
13 #include "SkMatrix.h"
14 #include "SkScaleToSides.h"
15
16 ///////////////////////////////////////////////////////////////////////////////
17
setRectXY(const SkRect & rect,SkScalar xRad,SkScalar yRad)18 void SkRRect::setRectXY(const SkRect& rect, SkScalar xRad, SkScalar yRad) {
19 if (!this->initializeRect(rect)) {
20 return;
21 }
22
23 if (!SkScalarsAreFinite(xRad, yRad)) {
24 xRad = yRad = 0; // devolve into a simple rect
25 }
26 if (xRad <= 0 || yRad <= 0) {
27 // all corners are square in this case
28 this->setRect(rect);
29 return;
30 }
31
32 if (fRect.width() < xRad+xRad || fRect.height() < yRad+yRad) {
33 SkScalar scale = SkMinScalar(fRect.width() / (xRad + xRad), fRect.height() / (yRad + yRad));
34 SkASSERT(scale < SK_Scalar1);
35 xRad *= scale;
36 yRad *= scale;
37 }
38
39 for (int i = 0; i < 4; ++i) {
40 fRadii[i].set(xRad, yRad);
41 }
42 fType = kSimple_Type;
43 if (xRad >= SkScalarHalf(fRect.width()) && yRad >= SkScalarHalf(fRect.height())) {
44 fType = kOval_Type;
45 // TODO: assert that all the x&y radii are already W/2 & H/2
46 }
47
48 SkASSERT(this->isValid());
49 }
50
setNinePatch(const SkRect & rect,SkScalar leftRad,SkScalar topRad,SkScalar rightRad,SkScalar bottomRad)51 void SkRRect::setNinePatch(const SkRect& rect, SkScalar leftRad, SkScalar topRad,
52 SkScalar rightRad, SkScalar bottomRad) {
53 if (!this->initializeRect(rect)) {
54 return;
55 }
56
57 const SkScalar array[4] = { leftRad, topRad, rightRad, bottomRad };
58 if (!SkScalarsAreFinite(array, 4)) {
59 this->setRect(rect); // devolve into a simple rect
60 return;
61 }
62
63 leftRad = SkMaxScalar(leftRad, 0);
64 topRad = SkMaxScalar(topRad, 0);
65 rightRad = SkMaxScalar(rightRad, 0);
66 bottomRad = SkMaxScalar(bottomRad, 0);
67
68 SkScalar scale = SK_Scalar1;
69 if (leftRad + rightRad > fRect.width()) {
70 scale = fRect.width() / (leftRad + rightRad);
71 }
72 if (topRad + bottomRad > fRect.height()) {
73 scale = SkMinScalar(scale, fRect.height() / (topRad + bottomRad));
74 }
75
76 if (scale < SK_Scalar1) {
77 leftRad *= scale;
78 topRad *= scale;
79 rightRad *= scale;
80 bottomRad *= scale;
81 }
82
83 if (leftRad == rightRad && topRad == bottomRad) {
84 if (leftRad >= SkScalarHalf(fRect.width()) && topRad >= SkScalarHalf(fRect.height())) {
85 fType = kOval_Type;
86 } else if (0 == leftRad || 0 == topRad) {
87 // If the left and (by equality check above) right radii are zero then it is a rect.
88 // Same goes for top/bottom.
89 fType = kRect_Type;
90 leftRad = 0;
91 topRad = 0;
92 rightRad = 0;
93 bottomRad = 0;
94 } else {
95 fType = kSimple_Type;
96 }
97 } else {
98 fType = kNinePatch_Type;
99 }
100
101 fRadii[kUpperLeft_Corner].set(leftRad, topRad);
102 fRadii[kUpperRight_Corner].set(rightRad, topRad);
103 fRadii[kLowerRight_Corner].set(rightRad, bottomRad);
104 fRadii[kLowerLeft_Corner].set(leftRad, bottomRad);
105
106 SkASSERT(this->isValid());
107 }
108
109 // These parameters intentionally double. Apropos crbug.com/463920, if one of the
110 // radii is huge while the other is small, single precision math can completely
111 // miss the fact that a scale is required.
compute_min_scale(double rad1,double rad2,double limit,double curMin)112 static double compute_min_scale(double rad1, double rad2, double limit, double curMin) {
113 if ((rad1 + rad2) > limit) {
114 return SkTMin(curMin, limit / (rad1 + rad2));
115 }
116 return curMin;
117 }
118
setRectRadii(const SkRect & rect,const SkVector radii[4])119 void SkRRect::setRectRadii(const SkRect& rect, const SkVector radii[4]) {
120 if (!this->initializeRect(rect)) {
121 return;
122 }
123
124 if (!SkScalarsAreFinite(&radii[0].fX, 8)) {
125 this->setRect(rect); // devolve into a simple rect
126 return;
127 }
128
129 memcpy(fRadii, radii, sizeof(fRadii));
130
131 bool allCornersSquare = true;
132
133 // Clamp negative radii to zero
134 for (int i = 0; i < 4; ++i) {
135 if (fRadii[i].fX <= 0 || fRadii[i].fY <= 0) {
136 // In this case we are being a little fast & loose. Since one of
137 // the radii is 0 the corner is square. However, the other radii
138 // could still be non-zero and play in the global scale factor
139 // computation.
140 fRadii[i].fX = 0;
141 fRadii[i].fY = 0;
142 } else {
143 allCornersSquare = false;
144 }
145 }
146
147 if (allCornersSquare) {
148 this->setRect(rect);
149 return;
150 }
151
152 this->scaleRadii();
153 }
154
initializeRect(const SkRect & rect)155 bool SkRRect::initializeRect(const SkRect& rect) {
156 // Check this before sorting because sorting can hide nans.
157 if (!rect.isFinite()) {
158 *this = SkRRect();
159 return false;
160 }
161 fRect = rect.makeSorted();
162 if (fRect.isEmpty()) {
163 memset(fRadii, 0, sizeof(fRadii));
164 fType = kEmpty_Type;
165 return false;
166 }
167 return true;
168 }
169
scaleRadii()170 void SkRRect::scaleRadii() {
171
172 // Proportionally scale down all radii to fit. Find the minimum ratio
173 // of a side and the radii on that side (for all four sides) and use
174 // that to scale down _all_ the radii. This algorithm is from the
175 // W3 spec (http://www.w3.org/TR/css3-background/) section 5.5 - Overlapping
176 // Curves:
177 // "Let f = min(Li/Si), where i is one of { top, right, bottom, left },
178 // Si is the sum of the two corresponding radii of the corners on side i,
179 // and Ltop = Lbottom = the width of the box,
180 // and Lleft = Lright = the height of the box.
181 // If f < 1, then all corner radii are reduced by multiplying them by f."
182 double scale = 1.0;
183
184 // The sides of the rectangle may be larger than a float.
185 double width = (double)fRect.fRight - (double)fRect.fLeft;
186 double height = (double)fRect.fBottom - (double)fRect.fTop;
187 scale = compute_min_scale(fRadii[0].fX, fRadii[1].fX, width, scale);
188 scale = compute_min_scale(fRadii[1].fY, fRadii[2].fY, height, scale);
189 scale = compute_min_scale(fRadii[2].fX, fRadii[3].fX, width, scale);
190 scale = compute_min_scale(fRadii[3].fY, fRadii[0].fY, height, scale);
191
192 if (scale < 1.0) {
193 SkScaleToSides::AdjustRadii(width, scale, &fRadii[0].fX, &fRadii[1].fX);
194 SkScaleToSides::AdjustRadii(height, scale, &fRadii[1].fY, &fRadii[2].fY);
195 SkScaleToSides::AdjustRadii(width, scale, &fRadii[2].fX, &fRadii[3].fX);
196 SkScaleToSides::AdjustRadii(height, scale, &fRadii[3].fY, &fRadii[0].fY);
197 }
198
199 // At this point we're either oval, simple, or complex (not empty or rect).
200 this->computeType();
201
202 SkASSERT(this->isValid());
203 }
204
205 // This method determines if a point known to be inside the RRect's bounds is
206 // inside all the corners.
checkCornerContainment(SkScalar x,SkScalar y) const207 bool SkRRect::checkCornerContainment(SkScalar x, SkScalar y) const {
208 SkPoint canonicalPt; // (x,y) translated to one of the quadrants
209 int index;
210
211 if (kOval_Type == this->type()) {
212 canonicalPt.set(x - fRect.centerX(), y - fRect.centerY());
213 index = kUpperLeft_Corner; // any corner will do in this case
214 } else {
215 if (x < fRect.fLeft + fRadii[kUpperLeft_Corner].fX &&
216 y < fRect.fTop + fRadii[kUpperLeft_Corner].fY) {
217 // UL corner
218 index = kUpperLeft_Corner;
219 canonicalPt.set(x - (fRect.fLeft + fRadii[kUpperLeft_Corner].fX),
220 y - (fRect.fTop + fRadii[kUpperLeft_Corner].fY));
221 SkASSERT(canonicalPt.fX < 0 && canonicalPt.fY < 0);
222 } else if (x < fRect.fLeft + fRadii[kLowerLeft_Corner].fX &&
223 y > fRect.fBottom - fRadii[kLowerLeft_Corner].fY) {
224 // LL corner
225 index = kLowerLeft_Corner;
226 canonicalPt.set(x - (fRect.fLeft + fRadii[kLowerLeft_Corner].fX),
227 y - (fRect.fBottom - fRadii[kLowerLeft_Corner].fY));
228 SkASSERT(canonicalPt.fX < 0 && canonicalPt.fY > 0);
229 } else if (x > fRect.fRight - fRadii[kUpperRight_Corner].fX &&
230 y < fRect.fTop + fRadii[kUpperRight_Corner].fY) {
231 // UR corner
232 index = kUpperRight_Corner;
233 canonicalPt.set(x - (fRect.fRight - fRadii[kUpperRight_Corner].fX),
234 y - (fRect.fTop + fRadii[kUpperRight_Corner].fY));
235 SkASSERT(canonicalPt.fX > 0 && canonicalPt.fY < 0);
236 } else if (x > fRect.fRight - fRadii[kLowerRight_Corner].fX &&
237 y > fRect.fBottom - fRadii[kLowerRight_Corner].fY) {
238 // LR corner
239 index = kLowerRight_Corner;
240 canonicalPt.set(x - (fRect.fRight - fRadii[kLowerRight_Corner].fX),
241 y - (fRect.fBottom - fRadii[kLowerRight_Corner].fY));
242 SkASSERT(canonicalPt.fX > 0 && canonicalPt.fY > 0);
243 } else {
244 // not in any of the corners
245 return true;
246 }
247 }
248
249 // A point is in an ellipse (in standard position) if:
250 // x^2 y^2
251 // ----- + ----- <= 1
252 // a^2 b^2
253 // or :
254 // b^2*x^2 + a^2*y^2 <= (ab)^2
255 SkScalar dist = SkScalarSquare(canonicalPt.fX) * SkScalarSquare(fRadii[index].fY) +
256 SkScalarSquare(canonicalPt.fY) * SkScalarSquare(fRadii[index].fX);
257 return dist <= SkScalarSquare(fRadii[index].fX * fRadii[index].fY);
258 }
259
allCornersCircular(SkScalar tolerance) const260 bool SkRRect::allCornersCircular(SkScalar tolerance) const {
261 return SkScalarNearlyEqual(fRadii[0].fX, fRadii[0].fY, tolerance) &&
262 SkScalarNearlyEqual(fRadii[1].fX, fRadii[1].fY, tolerance) &&
263 SkScalarNearlyEqual(fRadii[2].fX, fRadii[2].fY, tolerance) &&
264 SkScalarNearlyEqual(fRadii[3].fX, fRadii[3].fY, tolerance);
265 }
266
contains(const SkRect & rect) const267 bool SkRRect::contains(const SkRect& rect) const {
268 if (!this->getBounds().contains(rect)) {
269 // If 'rect' isn't contained by the RR's bounds then the
270 // RR definitely doesn't contain it
271 return false;
272 }
273
274 if (this->isRect()) {
275 // the prior test was sufficient
276 return true;
277 }
278
279 // At this point we know all four corners of 'rect' are inside the
280 // bounds of of this RR. Check to make sure all the corners are inside
281 // all the curves
282 return this->checkCornerContainment(rect.fLeft, rect.fTop) &&
283 this->checkCornerContainment(rect.fRight, rect.fTop) &&
284 this->checkCornerContainment(rect.fRight, rect.fBottom) &&
285 this->checkCornerContainment(rect.fLeft, rect.fBottom);
286 }
287
radii_are_nine_patch(const SkVector radii[4])288 static bool radii_are_nine_patch(const SkVector radii[4]) {
289 return radii[SkRRect::kUpperLeft_Corner].fX == radii[SkRRect::kLowerLeft_Corner].fX &&
290 radii[SkRRect::kUpperLeft_Corner].fY == radii[SkRRect::kUpperRight_Corner].fY &&
291 radii[SkRRect::kUpperRight_Corner].fX == radii[SkRRect::kLowerRight_Corner].fX &&
292 radii[SkRRect::kLowerLeft_Corner].fY == radii[SkRRect::kLowerRight_Corner].fY;
293 }
294
295 // There is a simplified version of this method in setRectXY
computeType()296 void SkRRect::computeType() {
297 SK_AT_SCOPE_EXIT(SkASSERT(this->isValid()));
298
299 if (fRect.isEmpty()) {
300 SkASSERT(fRect.isSorted());
301 for (size_t i = 0; i < SK_ARRAY_COUNT(fRadii); ++i) {
302 SkASSERT((fRadii[i] == SkVector{0, 0}));
303 }
304 fType = kEmpty_Type;
305 return;
306 }
307
308 bool allRadiiEqual = true; // are all x radii equal and all y radii?
309 bool allCornersSquare = 0 == fRadii[0].fX || 0 == fRadii[0].fY;
310
311 for (int i = 1; i < 4; ++i) {
312 if (0 != fRadii[i].fX && 0 != fRadii[i].fY) {
313 // if either radius is zero the corner is square so both have to
314 // be non-zero to have a rounded corner
315 allCornersSquare = false;
316 }
317 if (fRadii[i].fX != fRadii[i-1].fX || fRadii[i].fY != fRadii[i-1].fY) {
318 allRadiiEqual = false;
319 }
320 }
321
322 if (allCornersSquare) {
323 fType = kRect_Type;
324 return;
325 }
326
327 if (allRadiiEqual) {
328 if (fRadii[0].fX >= SkScalarHalf(fRect.width()) &&
329 fRadii[0].fY >= SkScalarHalf(fRect.height())) {
330 fType = kOval_Type;
331 } else {
332 fType = kSimple_Type;
333 }
334 return;
335 }
336
337 if (radii_are_nine_patch(fRadii)) {
338 fType = kNinePatch_Type;
339 } else {
340 fType = kComplex_Type;
341 }
342 }
343
matrix_only_scale_and_translate(const SkMatrix & matrix)344 static bool matrix_only_scale_and_translate(const SkMatrix& matrix) {
345 const SkMatrix::TypeMask m = (SkMatrix::TypeMask) (SkMatrix::kAffine_Mask
346 | SkMatrix::kPerspective_Mask);
347 return (matrix.getType() & m) == 0;
348 }
349
transform(const SkMatrix & matrix,SkRRect * dst) const350 bool SkRRect::transform(const SkMatrix& matrix, SkRRect* dst) const {
351 if (nullptr == dst) {
352 return false;
353 }
354
355 // Assert that the caller is not trying to do this in place, which
356 // would violate const-ness. Do not return false though, so that
357 // if they know what they're doing and want to violate it they can.
358 SkASSERT(dst != this);
359
360 if (matrix.isIdentity()) {
361 *dst = *this;
362 return true;
363 }
364
365 // If transform supported 90 degree rotations (which it could), we could
366 // use SkMatrix::rectStaysRect() to check for a valid transformation.
367 if (!matrix_only_scale_and_translate(matrix)) {
368 return false;
369 }
370
371 SkRect newRect;
372 if (!matrix.mapRect(&newRect, fRect)) {
373 return false;
374 }
375
376 // The matrix may have scaled us to zero (or due to float madness, we now have collapsed
377 // some dimension of the rect, so we need to check for that. Note that matrix must be
378 // scale and translate and mapRect() produces a sorted rect. So an empty rect indicates
379 // loss of precision.
380 if (!newRect.isFinite() || newRect.isEmpty()) {
381 return false;
382 }
383
384 // At this point, this is guaranteed to succeed, so we can modify dst.
385 dst->fRect = newRect;
386
387 // Since the only transforms that were allowed are scale and translate, the type
388 // remains unchanged.
389 dst->fType = fType;
390
391 if (kRect_Type == fType) {
392 SkASSERT(dst->isValid());
393 return true;
394 }
395 if (kOval_Type == fType) {
396 for (int i = 0; i < 4; ++i) {
397 dst->fRadii[i].fX = SkScalarHalf(newRect.width());
398 dst->fRadii[i].fY = SkScalarHalf(newRect.height());
399 }
400 SkASSERT(dst->isValid());
401 return true;
402 }
403
404 // Now scale each corner
405 SkScalar xScale = matrix.getScaleX();
406 const bool flipX = xScale < 0;
407 if (flipX) {
408 xScale = -xScale;
409 }
410 SkScalar yScale = matrix.getScaleY();
411 const bool flipY = yScale < 0;
412 if (flipY) {
413 yScale = -yScale;
414 }
415
416 // Scale the radii without respecting the flip.
417 for (int i = 0; i < 4; ++i) {
418 dst->fRadii[i].fX = fRadii[i].fX * xScale;
419 dst->fRadii[i].fY = fRadii[i].fY * yScale;
420 }
421
422 // Now swap as necessary.
423 if (flipX) {
424 if (flipY) {
425 // Swap with opposite corners
426 SkTSwap(dst->fRadii[kUpperLeft_Corner], dst->fRadii[kLowerRight_Corner]);
427 SkTSwap(dst->fRadii[kUpperRight_Corner], dst->fRadii[kLowerLeft_Corner]);
428 } else {
429 // Only swap in x
430 SkTSwap(dst->fRadii[kUpperRight_Corner], dst->fRadii[kUpperLeft_Corner]);
431 SkTSwap(dst->fRadii[kLowerRight_Corner], dst->fRadii[kLowerLeft_Corner]);
432 }
433 } else if (flipY) {
434 // Only swap in y
435 SkTSwap(dst->fRadii[kUpperLeft_Corner], dst->fRadii[kLowerLeft_Corner]);
436 SkTSwap(dst->fRadii[kUpperRight_Corner], dst->fRadii[kLowerRight_Corner]);
437 }
438
439 if (!AreRectAndRadiiValid(dst->fRect, dst->fRadii)) {
440 return false;
441 }
442
443 dst->scaleRadii();
444 dst->isValid();
445
446 return true;
447 }
448
449 ///////////////////////////////////////////////////////////////////////////////
450
inset(SkScalar dx,SkScalar dy,SkRRect * dst) const451 void SkRRect::inset(SkScalar dx, SkScalar dy, SkRRect* dst) const {
452 SkRect r = fRect.makeInset(dx, dy);
453 bool degenerate = false;
454 if (r.fRight <= r.fLeft) {
455 degenerate = true;
456 r.fLeft = r.fRight = SkScalarAve(r.fLeft, r.fRight);
457 }
458 if (r.fBottom <= r.fTop) {
459 degenerate = true;
460 r.fTop = r.fBottom = SkScalarAve(r.fTop, r.fBottom);
461 }
462 if (degenerate) {
463 dst->fRect = r;
464 memset(dst->fRadii, 0, sizeof(dst->fRadii));
465 dst->fType = kEmpty_Type;
466 return;
467 }
468 if (!r.isFinite()) {
469 *dst = SkRRect();
470 return;
471 }
472
473 SkVector radii[4];
474 memcpy(radii, fRadii, sizeof(radii));
475 for (int i = 0; i < 4; ++i) {
476 if (radii[i].fX) {
477 radii[i].fX -= dx;
478 }
479 if (radii[i].fY) {
480 radii[i].fY -= dy;
481 }
482 }
483 dst->setRectRadii(r, radii);
484 }
485
486 ///////////////////////////////////////////////////////////////////////////////
487
writeToMemory(void * buffer) const488 size_t SkRRect::writeToMemory(void* buffer) const {
489 // Serialize only the rect and corners, but not the derived type tag.
490 memcpy(buffer, this, kSizeInMemory);
491 return kSizeInMemory;
492 }
493
writeToBuffer(SkWBuffer * buffer) const494 void SkRRect::writeToBuffer(SkWBuffer* buffer) const {
495 // Serialize only the rect and corners, but not the derived type tag.
496 buffer->write(this, kSizeInMemory);
497 }
498
readFromMemory(const void * buffer,size_t length)499 size_t SkRRect::readFromMemory(const void* buffer, size_t length) {
500 if (length < kSizeInMemory) {
501 return 0;
502 }
503
504 SkRRect raw;
505 memcpy(&raw, buffer, kSizeInMemory);
506 this->setRectRadii(raw.fRect, raw.fRadii);
507 return kSizeInMemory;
508 }
509
readFromBuffer(SkRBuffer * buffer)510 bool SkRRect::readFromBuffer(SkRBuffer* buffer) {
511 if (buffer->available() < kSizeInMemory) {
512 return false;
513 }
514 SkRRect storage;
515 return buffer->read(&storage, kSizeInMemory) &&
516 (this->readFromMemory(&storage, kSizeInMemory) == kSizeInMemory);
517 }
518
519 #include "SkString.h"
520 #include "SkStringUtils.h"
521
dump(bool asHex) const522 void SkRRect::dump(bool asHex) const {
523 SkScalarAsStringType asType = asHex ? kHex_SkScalarAsStringType : kDec_SkScalarAsStringType;
524
525 fRect.dump(asHex);
526 SkString line("const SkPoint corners[] = {\n");
527 for (int i = 0; i < 4; ++i) {
528 SkString strX, strY;
529 SkAppendScalar(&strX, fRadii[i].x(), asType);
530 SkAppendScalar(&strY, fRadii[i].y(), asType);
531 line.appendf(" { %s, %s },", strX.c_str(), strY.c_str());
532 if (asHex) {
533 line.appendf(" /* %f %f */", fRadii[i].x(), fRadii[i].y());
534 }
535 line.append("\n");
536 }
537 line.append("};");
538 SkDebugf("%s\n", line.c_str());
539 }
540
541 ///////////////////////////////////////////////////////////////////////////////
542
543 /**
544 * We need all combinations of predicates to be true to have a "safe" radius value.
545 */
are_radius_check_predicates_valid(SkScalar rad,SkScalar min,SkScalar max)546 static bool are_radius_check_predicates_valid(SkScalar rad, SkScalar min, SkScalar max) {
547 return (min <= max) && (rad <= max - min) && (min + rad <= max) && (max - rad >= min) &&
548 rad >= 0;
549 }
550
isValid() const551 bool SkRRect::isValid() const {
552 if (!AreRectAndRadiiValid(fRect, fRadii)) {
553 return false;
554 }
555
556 bool allRadiiZero = (0 == fRadii[0].fX && 0 == fRadii[0].fY);
557 bool allCornersSquare = (0 == fRadii[0].fX || 0 == fRadii[0].fY);
558 bool allRadiiSame = true;
559
560 for (int i = 1; i < 4; ++i) {
561 if (0 != fRadii[i].fX || 0 != fRadii[i].fY) {
562 allRadiiZero = false;
563 }
564
565 if (fRadii[i].fX != fRadii[i-1].fX || fRadii[i].fY != fRadii[i-1].fY) {
566 allRadiiSame = false;
567 }
568
569 if (0 != fRadii[i].fX && 0 != fRadii[i].fY) {
570 allCornersSquare = false;
571 }
572 }
573 bool patchesOfNine = radii_are_nine_patch(fRadii);
574
575 if (fType < 0 || fType > kLastType) {
576 return false;
577 }
578
579 switch (fType) {
580 case kEmpty_Type:
581 if (!fRect.isEmpty() || !allRadiiZero || !allRadiiSame || !allCornersSquare) {
582 return false;
583 }
584 break;
585 case kRect_Type:
586 if (fRect.isEmpty() || !allRadiiZero || !allRadiiSame || !allCornersSquare) {
587 return false;
588 }
589 break;
590 case kOval_Type:
591 if (fRect.isEmpty() || allRadiiZero || !allRadiiSame || allCornersSquare) {
592 return false;
593 }
594
595 for (int i = 0; i < 4; ++i) {
596 if (!SkScalarNearlyEqual(fRadii[i].fX, SkScalarHalf(fRect.width())) ||
597 !SkScalarNearlyEqual(fRadii[i].fY, SkScalarHalf(fRect.height()))) {
598 return false;
599 }
600 }
601 break;
602 case kSimple_Type:
603 if (fRect.isEmpty() || allRadiiZero || !allRadiiSame || allCornersSquare) {
604 return false;
605 }
606 break;
607 case kNinePatch_Type:
608 if (fRect.isEmpty() || allRadiiZero || allRadiiSame || allCornersSquare ||
609 !patchesOfNine) {
610 return false;
611 }
612 break;
613 case kComplex_Type:
614 if (fRect.isEmpty() || allRadiiZero || allRadiiSame || allCornersSquare ||
615 patchesOfNine) {
616 return false;
617 }
618 break;
619 }
620
621 return true;
622 }
623
AreRectAndRadiiValid(const SkRect & rect,const SkVector radii[4])624 bool SkRRect::AreRectAndRadiiValid(const SkRect& rect, const SkVector radii[4]) {
625 if (!rect.isFinite() || !rect.isSorted()) {
626 return false;
627 }
628 for (int i = 0; i < 4; ++i) {
629 if (!are_radius_check_predicates_valid(radii[i].fX, rect.fLeft, rect.fRight) ||
630 !are_radius_check_predicates_valid(radii[i].fY, rect.fTop, rect.fBottom)) {
631 return false;
632 }
633 }
634 return true;
635 }
636 ///////////////////////////////////////////////////////////////////////////////
637