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* Revert "offset angle check edge in common"Gravatar Cary Clark2017-01-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit d2eb581ebc8f8009e80cccccd74d5b341ef5bd5b. Reason for revert: broke Google3 MSAN run of dm Original change's description: > offset angle check edge in common > > When curves cross, their intersection points may be nearby, but not exactly the same. > Sort the angles formed by the crossing curves when all angles don't have the same > origin. > > This sets up the framework to solve test case that currently fail (e.g., joel6) but > does not fix all related test cases (e.g., joel9). > > All older existing test cases, including extended tests, pass. > > Rework the test framework to better report when tests expected to produce failing > results now pass. > > Add new point and vector operations to support offset angles. > > TBR=reed@google.com > BUG=skia:6041 > > Change-Id: I67c651ded0a25e99ad93d55d6a35109b3ee3698e > Reviewed-on: https://skia-review.googlesource.com/6624 > Commit-Queue: Cary Clark <caryclark@google.com> > Reviewed-by: Cary Clark <caryclark@google.com> > TBR=caryclark@google.com,reviews@skia.org # Not skipping CQ checks because original CL landed > 1 day ago. BUG=skia:6041 Change-Id: I43db0808522ac44aceeb4f70e296167ea84a3663 Reviewed-on: https://skia-review.googlesource.com/7373 Commit-Queue: Cary Clark <caryclark@google.com> Reviewed-by: Cary Clark <caryclark@google.com>
* offset angle check edge in commonGravatar Cary Clark2017-01-20
| | | | | | | | | | | | | | | | | | | | | | | | When curves cross, their intersection points may be nearby, but not exactly the same. Sort the angles formed by the crossing curves when all angles don't have the same origin. This sets up the framework to solve test case that currently fail (e.g., joel6) but does not fix all related test cases (e.g., joel9). All older existing test cases, including extended tests, pass. Rework the test framework to better report when tests expected to produce failing results now pass. Add new point and vector operations to support offset angles. TBR=reed@google.com BUG=skia:6041 Change-Id: I67c651ded0a25e99ad93d55d6a35109b3ee3698e Reviewed-on: https://skia-review.googlesource.com/6624 Commit-Queue: Cary Clark <caryclark@google.com> Reviewed-by: Cary Clark <caryclark@google.com>
* more simplify bugsGravatar Cary Clark2016-12-14
| | | | | | | | | | | | | | | | | | | | | | | | | | SkOpAngle::alignmentSameSide() Shifting an edge to align it for angle sorting may move a compared edge to the opposite side. For lines that are shifted, check to see if this is so. class SkOpContourBuilder If the path contains a pair of lines that cancel, skip them as early as possible. While not strictly necessary, this optimization is cheap and makes debugging much easier. SkOpEdgeBuilder::walk() case SkPath::kCubic_Verb: If max curvature or inflections break a cubic into pieces, make sure that the pieces are large enough to process. If not, add the broken piece back to a neighbor. Correct debugging that had gone stale. Add active span debugging cache so only changes are shown. TBR=reed@google.com BUG=skia:6401 Change-Id: I766f77e4fb9b76537cf5464961addb103114f5db Reviewed-on: https://skia-review.googlesource.com/5764 Reviewed-by: Cary Clark <caryclark@google.com> Commit-Queue: Cary Clark <caryclark@google.com>
* fuzz hang fix and pathops client debuggingGravatar Cary Clark2016-11-15
| | | | | | | | | | | | | | | | | The ASAN fuzzer on chrome caught a hanging state. To capture the data, allow the pathops client debugging to run in a release build. TBR=reed@google.com BUG=665295 GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4834 Change-Id: I6b2c2baabd63994f63aa730d2ee7828986b5ab89 Reviewed-on: https://skia-review.googlesource.com/4834 Commit-Queue: Cary Clark <caryclark@google.com> Reviewed-by: Cary Clark <caryclark@google.com>
* formalize host debuggingGravatar caryclark2016-10-24
| | | | | | | | | | | | | | Pathops writes files, anticipating upcoming crashes, and verifies the results against regions. Formalize these debugging methods so that they are more easily triggered by hosts outside of skia unit tests. TBR=reed@google.com GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2441763003 Review-Url: https://codereview.chromium.org/2441763003
* break ambiguous angle sorting loopGravatar caryclark2016-10-18
| | | | | | | | | | | | | | | | | | A pair of cubics may be difficult to sort if the tangents suggest one sort but the midpoints suggest a different one. When in this gray area, and when the cumulative sort of all the angles fails to resolve, reverse the sort to break the tie. Before, when tiger8 was run through the signed distance field generated directly from the path data, the simplify call might hang since the angle could not be resolved. If the endless loop is detected, and if there is no tie to break, just fail instead. TBR=reed@google.com BUG=skia:5131 GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2426753002 Review-Url: https://codereview.chromium.org/2426753002
* remove dead codeGravatar Cary Clark2016-10-05
| | | | | | | | | | | | | | | Use code coverage and a new '-c' flag to find and remove unneeded code. TBR=reed@google.com GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2397593002 patch from issue 2397593002 at patchset 1 (http://crrev.com/2397593002#ps1) Change-Id: I741a82de9191146c10457d4c0b9cb9605dff2069 Reviewed-on: https://skia-review.googlesource.com/2983 Reviewed-by: Cary Clark <caryclark@google.com>
* coin debugging runs all tests in extendedGravatar Cary Clark2016-10-04
| | | | | | | | | | | | | | | | | | | This extends path ops concidence debugging to find unused algorithms and determine the extent of loops. This verifies that all 140M tests run without error in release and debug. TBR=reed@google.com BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2391733002 patch from issue 2391733002 at patchset 1 (http://crrev.com/2391733002#ps1) Change-Id: I02ca29764405c5ac3e7ca3b2621fba28dbaaffc2 Reviewed-on: https://skia-review.googlesource.com/2923 Reviewed-by: Cary Clark <caryclark@google.com>
* fix tiger bGravatar caryclark2016-09-26
| | | | | | | | | | | | | | | The tiger tests have uncovered numerous bugs. This CL fixes the last of them. If a pair of curves do not intersect, but have one or both ends very close to the opposite curve, consider that an intersection. TBR=reed@google.com BUG=skia:5131 GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2356363003 Review-Url: https://codereview.chromium.org/2356363003
* split tight quads and conicsGravatar caryclark2016-09-23
| | | | | | | | | | | | Tight quads and conics may nearly fold over on themselves, confusing coincidence against other curves. Split them at their max curvature early on to avoid complicating later logic. TBR=reed@google.com BUG=skia:5131 GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2357353002 Review-Url: https://codereview.chromium.org/2357353002
* quad and conic do not intersectGravatar caryclark2016-09-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a quad a conic intersect only where the end of one is contained by the convex hull of the other, and the curve contained by the hull is nearly a straight line, treating it as a line may move the end point to the other side of the curve. Detect this by checking to see if the end point is in the hull, and if so, continue to subdivide the curve rather than treating it as a line. This fixes several existing tests that were disabled earlier this year. A typo in SkDCurve::nearPoint() prevented detecting when the end of a line was nearly touching a curve. Also fixed concidence a bit to get the second half of tiger further along. All existing tests, including extended testing in Release and the first half of tiger, work. TBR=reed@google.com BUG=skia:5131 GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2338323002 Review-Url: https://codereview.chromium.org/2338323002
* Rewriting path writerGravatar caryclark2016-09-14
| | | | | | | | | | | | | | | | | | | | | | | | | The path writer takes constructs the output path out of curves that satisfy the pathop operation. Curves contain lists of t/point pairs that may not be comparable to each other. To match up curve ends in the output path, look for adjacent curves to have a shared membership rather than comparing point values. Use path utilities to connect partial curve lists into closed contours. Share the angle code that determines if a curve has become a degenerate line with the path writer. Clean up some code on the way, and delete some unused functions. TBR=reed@google.com BUG=5188 GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2321973005 Review-Url: https://codereview.chromium.org/2321973005
* Skip adding coincident edges foundGravatar caryclark2016-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | during curve intersection if their ends are nearly the same. Loosen conic/line intersection point check. Detect when coincident points are unordered. This means that points a/b/c on one curve may appear in b/c/a order on the opposite curve. Restructure addMissing to return success and return if a coincidence was added as a parameter. With this, tiger part a works. Tiger part b exposes bugs around tight quads that are nearly coincident with themselves, and are coincident with something else. The greedy coicident matcher may cause the point order to be out of sync. Still working out what to do in this case. TBR=reed@google.com GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2321773002 Review-Url: https://codereview.chromium.org/2321773002
* pathops coincident workGravatar caryclark2016-08-31
| | | | | | | | | | | | | This is working towards fixing all bugs around simplifying the tiger. This installment simplifies the point-t intersection list as it is built rather than doing the analysis once the intersections are complete. This avoids getting the list in an inconsistent state and makes coincident checks faster and more stable. GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2237223002 TBR=reed@google.com BUG=skia:5131 Review-Url: https://codereview.chromium.org/2237223002
* path ops stream-liningGravatar caryclark2016-08-25
| | | | | | | | | | | | | | | | The addT() function is a workhorse of pathops. Make it simpler, removing branches and parameters. Separate addOpp() into const and modify parts. Add more debugging that asserts if the function fails and the data is not extreme (e.g., fuzzer generated). TBR=reed@google.com GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2273293004 Review-Url: https://codereview.chromium.org/2273293004
* add pathops debuggingGravatar caryclark2016-08-25
| | | | | | | | | | | | | | | | | | | Pathops has many points of failure, most of which are triggered by extreme data generated by fuzzers. It's difficult to figure out which failure point was triggered when the operation gives up. Add instrumentation so that the failure can be debugged when the data is well-behaved. Also, add a check that looks for a sequence of coincident points on multiple edges that are out of order when compared to each other. TBR=reed@google.com GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2274803003 Review-Url: https://codereview.chromium.org/2274803003
* Fix SkDEBUGCODE to accept commasGravatar csmartdalton2016-08-10
| | | | | | | BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2231663002 Review-Url: https://codereview.chromium.org/2231663002
* pathops coincidence and security rewriteGravatar caryclark2016-07-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Most changes stem from working on an examples bracketed by #if DEBUG_UNDER_DEVELOPMENT // tiger These exposed many problems with coincident curves, as well as errors throughout the code. Fixing these errors also fixed a number of fuzzer-inspired bug reports. * Line/Curve Intersections Check to see if the end of the line nearly intersects the curve. This was a FIXME in the old code. * Performance Use a central chunk allocator. Plumb the allocator into the global variable state so that it can be shared. (Note that 'SkGlobalState' is allocated on the stack and is visible to children functions but not other threads.) * Refactor Let SkOpAngle grow up from a structure to a class. Let SkCoincidentSpans grow up from a structure to a class. Rename enum Alias to AliasMatch. * Coincidence Rewrite Add more debugging to coincidence detection. Parallel debugging routines have read-only logic to report the current coincidence state so that steps through the logic can expose whether things got better or worse. More functions can error-out and cause the pathops engine to non-destructively exit. * Accuracy Remove code that adjusted point locations. Instead, offset the curve part so that sorted curves all use the same origin. Reduce the size (and influence) of magic numbers. * Testing The debug suite with verify and the full release suite ./out/Debug/pathops_unittest -v -V ./out/Release/pathops_unittest -v -V -x expose one error. That error is captured as cubics_d3. This error exists in the checked in code as well. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2128633003 BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2128633003 Review-Url: https://codereview.chromium.org/2128633003
* Reland of path ops: fix conic weight and partial coincidence (patchset #1 ↵Gravatar caryclark2015-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | id:1 of https://codereview.chromium.org/1408923003/ ) Reason for revert: suppressions have landed in chrome Original issue's description: > Revert of path ops: fix conic weight and partial coincidence (patchset #5 id:80001 of https://codereview.chromium.org/1413763002/ ) > > Reason for revert: > path ops change breaks svg clipping layout tests -- conic is now more accurate, changing edge of circle in clip > > These need to be rebaselined > > svg/clip-path/clip-path-child-clipped.svg > svg/clip-path/clip-path-nonzero.svg > svg/clip-path/clip-path-evenodd-nonzero.svg > svg/clip-path/clip-path-nonzero-evenodd.svg > > Original issue's description: > > The remaining 1m skp bugs are asserts that can be harmlessly > > suppressed and bugs around conics. > > > > The conic calculation for a subdivided w was just wrong. > > > > Also added debugging to template intersection to initialize > > reused structures and dump additional data. > > > > TBR=reed@google.com > > > > Committed: https://skia.googlesource.com/skia/+/ef33b1e739b23a1201100ff17a572da85b03d9af > > TBR= > NOPRESUBMIT=true > NOTREECHECKS=true > NOTRY=true > > Committed: https://skia.googlesource.com/skia/+/f428df1be3e96d3f8970d0f7f415b862f7da5404 TBR= NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true Review URL: https://codereview.chromium.org/1407003016
* Revert of path ops: fix conic weight and partial coincidence (patchset #5 ↵Gravatar caryclark2015-10-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | id:80001 of https://codereview.chromium.org/1413763002/ ) Reason for revert: path ops change breaks svg clipping layout tests -- conic is now more accurate, changing edge of circle in clip These need to be rebaselined svg/clip-path/clip-path-child-clipped.svg svg/clip-path/clip-path-nonzero.svg svg/clip-path/clip-path-evenodd-nonzero.svg svg/clip-path/clip-path-nonzero-evenodd.svg Original issue's description: > The remaining 1m skp bugs are asserts that can be harmlessly > suppressed and bugs around conics. > > The conic calculation for a subdivided w was just wrong. > > Also added debugging to template intersection to initialize > reused structures and dump additional data. > > TBR=reed@google.com > > Committed: https://skia.googlesource.com/skia/+/ef33b1e739b23a1201100ff17a572da85b03d9af TBR= NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true Review URL: https://codereview.chromium.org/1408923003
* The remaining 1m skp bugs are asserts that can be harmlesslyGravatar caryclark2015-10-20
| | | | | | | | | | | | | suppressed and bugs around conics. The conic calculation for a subdivided w was just wrong. Also added debugging to template intersection to initialize reused structures and dump additional data. TBR=reed@google.com Review URL: https://codereview.chromium.org/1413763002
* Enabling clip stack flattening exercises path ops.Gravatar caryclark2015-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Iterating through the 903K skps that represent the imagable 1M top web pages triggers a number of bugs, some of which are addressed here. Some web pages trigger intersecting cubic representations of arc with their conic counterparts. This exposed a flaw in coincident detection that caused an infinite loop. The loop alternatively extended the coincident section and, determining the that the bounds of the curve pairs did not overlap, deleted the extension. Track the number of times the coincident detection is called, and if it exceeds an empirically found limit, assume that the curves are coincident and force it to be so. The loop count limit can be determined by enabling DEBUG_T_SECT_LOOP_COUNT and running all tests. The largest count is reported on completion. Another class of bugs was caused by concident detection duplicating nearly identical points that had been merged earlier. To track these bugs, the 'handle coincidence' code was duplicated as a const debug variety that reported if one of a dozen or so irregularities are present; then it is easier to see when a block of code that fixes one irregularity regresses another. Creating the debug const code version exposed some non-debug code that could be const, and some that was experimental and could be removed. Set DEBUG_COINCIDENCE to track coincidence health and handling. For running on Chrome, DEBUG_VERIFY checks the result of pathops against the same operation using SkRegion to verify that the results are nearly the same. When visualizing the pathops work using tools/pathops_visualizer.htm, set DEBUG_DUMP_ALIGNMENT to see the curves after they've been aligned for coincidence. Other bugs fixed include detecting when a section of a pair of curves have devolved into lines and are coincident. TBR=reed@google.com Review URL: https://codereview.chromium.org/1394503003
* Remove include of stdlib.h from SkTypes.h.Gravatar bungeman2015-08-26
| | | | | | | | | | | | | | | Unfortunately, immintrin.h (which is also included by SkTypes) includes xmmintrin.h which includes mm_malloc.h which includes stdlib.h for malloc even though, from the implementation, it is difficult to see why. Fortunately, arm_neon.h does not seem to be involved in such shenanigans, so building for Android will keep things sane. TBR=reed@google.com Doesn't change Skia API, just moves an include. Review URL: https://codereview.chromium.org/1313203003
* When three or more edges are coincident, the logic needsGravatar caryclark2015-07-06
| | | | | | | | | | | | | | | | to compute the overlapping ranges and combine the winding into a single destination. This computes coincidence more rigorously, fixing the edge cases exposed by this bug. Also, add the ability to debug and dump pathop structures from the coincident context. TBR=reed@google.com BUG=skia:3651 Review URL: https://codereview.chromium.org/1182493015
* Path ops formerly found the topmost unprocessed edge and determined its ↵Gravatar caryclark2015-05-11
| | | | | | | | | | | | | | | angle sort order to initialize the winding. This never worked correctly with cubics and was flaky with paths consisting mostly of vertical edges. This replacement shoots axis-aligned rays through all intersecting edges to find the outermost one either horizontally or vertically. The resulting code is smaller and twice as fast. To support this, most of the horizontal / vertical intersection code was rewritten and standardized, and old code supporting the top-directed winding was deleted. Contours were pointed to by an SkTDArray. Instead, put them in a linked list, and designate the list head with its own class to ensure that methods that take lists of contours start at the top. This change removed a large percentage of memory allocations used by path ops. TBR=reed@google.com BUG=skia:3588 Review URL: https://codereview.chromium.org/1111333002
* minor fixes to cubics code and overall alignment of how bounds and tops are ↵Gravatar caryclark2015-04-29
| | | | | | | | | | | | computed for all curve types All but 17 extended tests work. A helper function is privately added to SkPath.h to permit a test to modify a given point in a path. BUG=skia:3588 Review URL: https://codereview.chromium.org/1107353004
* working on initial winding for cubicsGravatar caryclark2015-04-23
| | | | | | | | | | | Path ops works well for all tests except for cubics. Isolate failures caused by cubics, and do a better job of computing the initial winding for cubics. TBR=reed@google.com BUG=skia:3588 Review URL: https://codereview.chromium.org/1096923003
* Now, path ops natively intersect conics, quads, and cubics in any ↵Gravatar caryclark2015-04-20
| | | | | | | | | | | combination. There are still a class of cubic tests that fail and a handful of undiagnosed failures from skps and fuzz tests, but things are much better overall. Extended tests (150M+) run to completion in release in about 6 minutes; the standard test suite exceeds 100K and finishes in a few seconds on desktops. TBR=reed BUG=skia:3588 Review URL: https://codereview.chromium.org/1037953004
* cumulative pathops patchGravatar caryclark2015-03-26
| | | | | | | | | | | | | | | | | | | | | Replace the implicit curve intersection with a geometric curve intersection. The implicit intersection proved mathematically unstable and took a long time to zero in on an answer. Use pointers instead of indices to refer to parts of curves. Indices required awkward renumbering. Unify t and point values so that small intervals can be eliminated in one pass. Break cubics up front to eliminate loops and cusps. Make the Simplify and Op code more regular and eliminate arbitrary differences. Add a builder that takes an array of paths and operators. Delete unused code. BUG=skia:3588 R=reed@google.com Review URL: https://codereview.chromium.org/1037573004
* Revert of pathops version two (patchset #16 id:150001 of ↵Gravatar reed2015-03-24
| | | | | | | | | | | | | | | | | | | | | | | | | https://codereview.chromium.org/1002693002/) Reason for revert: ASAN investigation Original issue's description: > pathops version two > > R=reed@google.com > > marked 'no commit' to attempt to get trybots to run > > TBR=reed@google.com > > Committed: https://skia.googlesource.com/skia/+/ccec0f958ffc71a9986d236bc2eb335cb2111119 TBR=caryclark@google.com NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true Review URL: https://codereview.chromium.org/1029993002
* pathops version twoGravatar caryclark2015-03-24
| | | | | | | | | | R=reed@google.com marked 'no commit' to attempt to get trybots to run TBR=reed@google.com Review URL: https://codereview.chromium.org/1002693002
* These tests stress pathops by describing the union of circle-like paths that ↵Gravatar caryclark2014-11-13
| | | | | | | | | | | | | | | | | | | have tiny line segments embedded and double back to create near-coincident conditions. The fixes include - detect when finding the active top loops between two possible answers - preflight chasing winding to ensure answer is consistent - binary search more often when quadratic intersection fails - add more failure paths when an intersect is missed While this fixes the chrome bug, reenabling path ops in svg should be deferred until additional fixes are landed. TBR= BUG=421132 Committed: https://skia.googlesource.com/skia/+/6f726addf3178b01949bb389ef83cf14a1d7b6b2 Review URL: https://codereview.chromium.org/633393002
* Revert of harden pathops for pathological test (patchset #19 id:410001 of ↵Gravatar hcm2014-10-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | https://codereview.chromium.org/633393002/) Reason for revert: Compile errors on bots Original issue's description: > These tests stress pathops by describing the union of circle-like paths that have tiny line segments embedded and double back to create near-coincident conditions. > > The fixes include > - detect when finding the active top loops between two possible answers > - preflight chasing winding to ensure answer is consistent > - binary search more often when quadratic intersection fails > - add more failure paths when an intersect is missed > > While this fixes the chrome bug, reenabling path ops in svg should be deferred until additional fixes are landed. > > TBR= > BUG=421132 > > Committed: https://skia.googlesource.com/skia/+/6f726addf3178b01949bb389ef83cf14a1d7b6b2 TBR=caryclark@google.com NOTREECHECKS=true NOTRY=true BUG=421132 Review URL: https://codereview.chromium.org/686843002
* These tests stress pathops by describing the union of circle-like paths that ↵Gravatar caryclark2014-10-28
| | | | | | | | | | | | | | | | | have tiny line segments embedded and double back to create near-coincident conditions. The fixes include - detect when finding the active top loops between two possible answers - preflight chasing winding to ensure answer is consistent - binary search more often when quadratic intersection fails - add more failure paths when an intersect is missed While this fixes the chrome bug, reenabling path ops in svg should be deferred until additional fixes are landed. TBR= BUG=421132 Review URL: https://codereview.chromium.org/633393002
* fix battlefield website by disallowing very small coordinatesGravatar caryclark2014-09-18
| | | | | | | | | | | also add and remove comments to document other attempts to fix this that had drawbacks R=fmalita@chromium.org BUG=414409 Author: caryclark@google.com Review URL: https://codereview.chromium.org/575553003
* update pathops core and testsGravatar caryclark2014-07-18
| | | | | | | | | | split out skpclip (the test of 1M pictures) into its own project TBR=reed Author: caryclark@google.com Review URL: https://codereview.chromium.org/400033002
* Enabling the canvas bit to turn the clip stack into a flat replace exposed ↵Gravatar caryclark2014-06-17
| | | | | | | | | | | | | | | | | | around 100 failures when testing the 800K skp set generated from the top 1M web sites. This fixes all but one of those failures. Major changes include: - Replace angle indices with angle pointers. This was motivated by the need to add angles later but not renumber existing angles. - Aggressive segment chase. When the winding is known on a segment, more aggressively passing that winding to adjacent segments allows fragmented data sets to succeed. - Line segments with ends nearly the same are treated as coincident first. - Transfer partial coincidence by observing that if segment A is partially coincident to B and C then B and C may be partially coincident. TBR=reed Author: caryclark@google.com Review URL: https://codereview.chromium.org/272153002
* When solving the cubic line intersection directly fails, use binary search ↵Gravatar commit-bot@chromium.org2014-05-07
| | | | | | | | | | | | | | | | | as a fallback. The cubic line intersection math empirically works 99.99% of the time (fails 3100 out of 1B random tests) but when it fails, an intersection may be missed altogether. The binary search is may not find a solution if the cubic line failed to find any solutions at all, but so far that case hasn't arisen. BUG=skia:2504 TBR=reed@google.com Author: caryclark@google.com Review URL: https://codereview.chromium.org/266063003 git-svn-id: http://skia.googlecode.com/svn/trunk@14614 2bbb7eff-a529-9590-31e7-b0007b416f81
* fix minor skp-found bugsGravatar commit-bot@chromium.org2014-04-25
| | | | | | | | | | | | | remove globals from pathops_unittest BUG=skia:2460 TBR=mtklein Author: caryclark@google.com Review URL: https://codereview.chromium.org/239563004 git-svn-id: http://skia.googlecode.com/svn/trunk@14378 2bbb7eff-a529-9590-31e7-b0007b416f81
* Mike R: please sanity check SkPostConfig.hGravatar commit-bot@chromium.org2014-04-14
| | | | | | | | | | | | | | | | | | | | | | | | Mike K: please sanity check Test.cpp and skia_test.cpp Feel free to look at the rest, but I don't expect any in depth review of path ops innards. Path Ops first iteration used QuickSort to order segments radiating from an intersection to compute the winding rule. This revision uses a circular sort instead. Breaking out the circular sort into its own long-lived structure (SkOpAngle) allows doing less work and provides a home for caching additional sorting data. The circle sort is more stable than the former sort, has a robust ordering and fewer exceptions. It finds unsortable ordering less often. It is less reliant on the initial curve tangent, using convex hulls instead whenever it can. Additional debug validation makes sure that the computed structures are self-consistent. A new visualization tool helps verify that the angle ordering is correct. The 70+M tests pass with this change on Windows, Mac, Linux 32 and Linux 64 in debug and release. R=mtklein@google.com, reed@google.com Author: caryclark@google.com Review URL: https://codereview.chromium.org/131103009 git-svn-id: http://skia.googlecode.com/svn/trunk@14183 2bbb7eff-a529-9590-31e7-b0007b416f81
* Clean up SkTypes.h.Gravatar bungeman@google.com2013-10-11
| | | | | | | | | | | | | | | | | | | This change removes sk_stdint.h since it is only needed for vs2008 and earlier. This change removes SK_MMAP_SUPPORT define since it is no longer used. This change removes the stdio.h include from SkTypes.h since on many systems this is a very large header, few Skia files actually use it, it is available everywhere standard, and SkDebugf should be used instead. After this change there is no need for external users to put Skia's include/config into their own list of includes, saving the headache of having two header files of the same name and sometimes getting the wrong one depending on include order. R=bsalomon@google.com, djsollen@google.com Review URL: https://codereview.chromium.org/27044002 git-svn-id: http://skia.googlecode.com/svn/trunk@11738 2bbb7eff-a529-9590-31e7-b0007b416f81
* path ops work in progressGravatar caryclark@google.com2013-10-02
| | | | | | | | | | | | make more skps work remove edit files BUG= Review URL: https://codereview.chromium.org/23542056 git-svn-id: http://skia.googlecode.com/svn/trunk@11570 2bbb7eff-a529-9590-31e7-b0007b416f81
* path ops work in progressGravatar caryclark@google.com2013-09-16
| | | | | | | | | | path ops work in progress BUG= Review URL: https://codereview.chromium.org/21359002 git-svn-id: http://skia.googlecode.com/svn/trunk@11291 2bbb7eff-a529-9590-31e7-b0007b416f81
* turn off debugging printfsGravatar caryclark@google.com2013-07-23
| | | | | | | | | | | | | fix pathops issues 1417, 1418 be more rigorous about pulling intersections of lines to end points rewrite cubic/line and quad/line intersections to share style BUG= Review URL: https://codereview.chromium.org/19543005 git-svn-id: http://skia.googlecode.com/svn/trunk@10270 2bbb7eff-a529-9590-31e7-b0007b416f81
* path ops near exactGravatar caryclark@google.com2013-07-15
| | | | | | | | | | | | | | | | | Modify line intersections to first - match exact ends - compute intersections - match near ends where the exact ends are preferred, then near matches, then computed matches. This pulls matches towards existing end points when possible, and keeps intersection distances consistent with different line/line line/quad and line/cubic computations. BUG= Review URL: https://codereview.chromium.org/19183003 git-svn-id: http://skia.googlecode.com/svn/trunk@10073 2bbb7eff-a529-9590-31e7-b0007b416f81
* path ops work in progressGravatar caryclark@google.com2013-07-08
| | | | | | | | BUG= Review URL: https://codereview.chromium.org/18058007 git-svn-id: http://skia.googlecode.com/svn/trunk@9908 2bbb7eff-a529-9590-31e7-b0007b416f81
* path ops -- rewrite angle sortGravatar caryclark@google.com2013-06-04
| | | | | | | | | | | | | | | | | | | | | | | | This is a major change resulting from a minor tweak. In the old code, the intersection point of two curves was shared between them, but the intersection points and end points of sorted edges was computed directly from the intersection T value. In this CL, both intersection points and sorted points are the same, and intermediate control points are computed to preserve their slope. The sort itself has been completely rewritten to be more robust and remove 'magic' checks, conditions that empirically worked but couldn't be rationalized. This CL was triggered by errors generated computing the clips of SKP files. At this point, all 73M standard tests work and at least the first troublesome SKPs work. Review URL: https://codereview.chromium.org/15338003 git-svn-id: http://skia.googlecode.com/svn/trunk@9432 2bbb7eff-a529-9590-31e7-b0007b416f81
* path ops -- fix skp bugsGravatar caryclark@google.com2013-05-07
| | | | | | | | | This fixes a series of bugs discovered by running the small set of Skia skp files through pathops to flatten the clips. Review URL: https://codereview.chromium.org/14798004 git-svn-id: http://skia.googlecode.com/svn/trunk@9042 2bbb7eff-a529-9590-31e7-b0007b416f81
* path ops work in progressGravatar caryclark@google.com2013-04-18
| | | | | | | | | fix bugs in tests on 32 bit release Most changes revolve around pinning computed t values very close to zero and one. git-svn-id: http://skia.googlecode.com/svn/trunk@8745 2bbb7eff-a529-9590-31e7-b0007b416f81
* shape ops work in progressGravatar caryclark@google.com2013-04-17
| | | | | | | | | | | | | Try to fix the 32 bit build by making some math decisions more robust. Rewrite the cubic intersection special case that detects if only end points are shared. Rewrite the angle sort setup that computes whether a cubic bends to the left or right. git-svn-id: http://skia.googlecode.com/svn/trunk@8726 2bbb7eff-a529-9590-31e7-b0007b416f81
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