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Overlaps and anisotropic filtering#22

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izzyreal wants to merge 35 commits intomasterbehdad/glyphy:masterfrom overlaps-and-anisotropic-filteringbehdad/glyphy:overlaps-and-anisotropic-filteringCopy head branch name to clipboard

+715-66

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Commits on May 9, 2012

• Geometry code to check for arc (and segment) intersections. Runs, but not tested yet.

  

  Maysum Panju

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  a80c04f

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Commits on May 11, 2012

• Revised arc interesection detection functions. Does not always work if intersection is at an endpoint, though.

  

  Maysum Panju

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  cbde181

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Commits on May 16, 2012

• Intersection check of segment interior with endpoints should work.

  

  Maysum Panju

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  77654e9

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Commits on May 17, 2012

• Changed intersect functions to return intersection points, rather than boolean values. Lots of assumptions, e.g. at most one intersection point. Known bug: problem if arc intersects segment at arc …

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  Maysum Panju

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  9167fce

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Commits on May 18, 2012

• Removed glyph-overlap attempt; will have to restart with new approach.

  

  Maysum Panju

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  a7051bd

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• Added a check for arc endpoint/segment intersection.

  

  mhpanju

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  9ff48ee

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Commits on May 22, 2012

• Updated "segment contains point" method. Updated check for parallel lines.

  

  Maysum Panju

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  46429c4

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• Lots of work on rearrange_endpoints, which should change order that contours are drawn. Need to fix subsequent contours though.

  

  Maysum Panju

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  a2e13ad

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Commits on May 23, 2012

• Rearrange contours works, sorts contours by some intersection rule.

  

  Maysum Panju

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  8c789d9

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Commits on May 24, 2012

• Moved code around; rearranging endpoints now done in glyphy-blob. Contour intersection now checks roughly before doing too many calculations.

  

  Maysum Panju

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  9ba70e2

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Commits on May 29, 2012

• Started work on processing intersecting contours in stages. Not complete yet!

  

  Maysum Panju

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  6290a3e

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Commits on May 30, 2012

• Intersecting contours work! Kind of. Outlines on overlap regions are still visible, and coinciding contours seems to fail.

  

  Maysum Panju

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  87ab802

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Commits on May 31, 2012

• Outlines work properly in intersecting contours!!! Just need to fix a with cedilla case.

  

  Maysum Panju

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  a023ecd

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Commits on Jun 1, 2012

• Simple code cleanup. No major change

  

  Maysum Panju

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  e3e08b2

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Commits on Jun 4, 2012

• Fixed outline seam glitch, as in DroidSans.ttf glyph (a+cedilla) ą.

  

  Maysum Panju

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  fce3ed7

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• Began work on graph method for grouping contours. Set up vertex structure, made a vertex for each contour.

  

  Maysum Panju

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  d57d973

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Commits on Jun 5, 2012

• Added support for solid edges between vertices. The same framework can be used to add dotted edges soon.

  

  Maysum Panju

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  8e7da16

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Commits on Jun 6, 2012

• Dotted edges are now formed between contours that surround/contain each other.

  

  Maysum Panju

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  d42b6fb

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Commits on Jun 8, 2012

• No functional change, but started setting up for collapsed dotted edges.

  

  Maysum Panju

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  a6f26c7

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• Dotted edges are collapsed and the relevant vertices are merged in the contour relationship graph.

  

  Maysum Panju

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  e0af0fb

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Commits on Jun 12, 2012

• Handled cases where a cell is completely within one contour group, but contains other contours passing through it.

  

  Maysum Panju

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  68ece9c

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Commits on Jun 13, 2012

• Partition now chosen using the graph algorithm. Edges are repeated after merge, though. Requires bipartite graphs.

  

  Maysum Panju

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  aed4e4a

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Commits on Jun 14, 2012

• Edges in the new graph are no longer repeated.

  

  Maysum Panju

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  44eb644

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• Small floating point fix to help coincident outlines keep working.

  

  Maysum Panju

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  3b353f2

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Commits on Jun 15, 2012

• Fixed missing edge bug (very rare - need coincident points), and general code cleanup.

  

  Maysum Panju

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  3838582

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Commits on Jun 19, 2012

• Minor. Some light code cleanup; added some comments.

  

  Maysum Panju

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  a7a6d90

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Commits on Jun 20, 2012

• Modified glyphy_sdf to keep track of vector to nearest contour. Still not correct for line segments, and does not use this stored value.

  

  Maysum Panju

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  5e946bb

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Commits on Jun 25, 2012

• Subpixel rendering - Some progress on min_dist_vector returned by glyphy_sdf, but still not perfect at corners.

  

  Maysum Panju

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  b051088

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Commits on Jun 26, 2012

• SDF now has min_dist_vector with some nice shading, and functions now compartmentalized in glyphy_sdf somewhat, but a seaming bug is back, and vector sometimes points backwards.

  

  Maysum Panju

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  d61590b

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Commits on Jun 27, 2012

• Merged repeated code into a single "find_min_dist" function in glyphy-sdf. Still have seams. :-(

  

  Maysum Panju

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  27b20fa

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Commits on Jun 28, 2012

• The sdf vector now points in the correct direction... but seams still there!!

  

  Maysum Panju

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  309f59c

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Commits on Jun 29, 2012

• Minor fix.. but SEAMS ARE GONE. Smooth outlines, yessir.

  

  Maysum Panju

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  4e78597

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Commits on Jul 4, 2012

• Added TestFont with some bad examples; some colour revamp for sdf.

  

  Maysum Panju

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  8cbc8da

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• Some work on anisotrpic antialias

  

  Maysum Panju

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  d8f10c3

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Commits on Jul 9, 2012

• Enable anisotropic antialiasing: apply P_inverse to shortest vector when scaling.

  

  Maysum Panju

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  7c7575c

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