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* fix pathops fuzz bugsGravatar caryclark2016-06-08
| | | | | | | | | | | | | | | | | | | Fail out in a couple of new places when the input data is very large and exceeds the limits of the pathops machinery. Most of the change here plumbs in a way to exclude an assert in one of these exceptional cases. The current SkAddIntersection implementation and the inner functions it calls has no way to report an error to the root caller for an early exit, so rather than add that in, exclude the assert when the test that would trigger it runs (allowing the test to otherwise ensure that it properly fails). TBR=reed@google.com BUG=617586,617635 GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2046713003 Review-Url: https://codereview.chromium.org/2046713003
* Style Change: NULL->nullptrGravatar halcanary2015-08-27
| | | | | | DOCS_PREVIEW= https://skia.org/?cl=1316233002 Review URL: https://codereview.chromium.org/1316233002
* fix path ops fuzz busterGravatar caryclark2015-07-23
| | | | | | | | | | | | Mark collapsed segments as done and remove collapsed segment references from the coincidence array. Also add test names to global debugging. R=fmalita@chromium.org BUG=512592 Review URL: https://codereview.chromium.org/1250293002
* 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
* 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
* 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
* 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