summaryrefslogtreecommitdiff
path: root/external/glyphy/glyphy-upstream.patch.1
diff options
context:
space:
mode:
Diffstat (limited to 'external/glyphy/glyphy-upstream.patch.1')
-rw-r--r--external/glyphy/glyphy-upstream.patch.1211
1 files changed, 0 insertions, 211 deletions
diff --git a/external/glyphy/glyphy-upstream.patch.1 b/external/glyphy/glyphy-upstream.patch.1
deleted file mode 100644
index f898918f4c8f..000000000000
--- a/external/glyphy/glyphy-upstream.patch.1
+++ /dev/null
@@ -1,211 +0,0 @@
-From d6d6c61c8d0e336c34ba3f5d9adbe923ffa1cbe3 Mon Sep 17 00:00:00 2001
-From: Behdad Esfahbod <behdad@behdad.org>
-Date: Thu, 6 Aug 2015 15:34:38 +0100
-Subject: [PATCH 2/6] Implement more robust winding-direction algorithm
-
-Fixes 'p' in Comic Sans Bold for example. That font has many
-self-intersecting contours. The one in 'p' was causing complete
-winding direction reversal using old algorithm. Implement area-based
-algorithm.
----
- src/glyphy-outline.cc | 67 ++++++++++-----------------------------------------
- 1 file changed, 13 insertions(+), 54 deletions(-)
-
-diff --git a/src/glyphy-outline.cc b/src/glyphy-outline.cc
-index 3543f3b..ef71247 100644
---- a/src/glyphy-outline.cc
-+++ b/src/glyphy-outline.cc
-@@ -55,65 +55,24 @@ winding (const glyphy_arc_endpoint_t *endpoints,
- /*
- * Algorithm:
- *
-- * - Find the lowest-x part of the contour,
-- * - If the point is an endpoint:
-- * o compare the angle of the incoming and outgoing edges of that point
-- * to find out whether it's CW or CCW,
-- * - Otherwise, compare the y of the two endpoints of the arc with lowest-x point.
-- *
-- * Note:
-- *
-- * We can use a simpler algorithm here: Act as if arcs are lines, then use the
-- * triangle method to calculate the signed area of the contour and get the sign.
-- * It should work for all cases we care about. The only case failing would be
-- * that of two endpoints and two arcs. But we can even special-case that.
-+ * - Approximate arcs with triangles passing through the mid- and end-points,
-+ * - Calculate the area of the contour,
-+ * - Return sign.
- */
-
-- unsigned int corner = 1;
-- for (unsigned int i = 2; i < num_endpoints; i++)
-- if (endpoints[i].p.x < endpoints[corner].p.x ||
-- (endpoints[i].p.x == endpoints[corner].p.x &&
-- endpoints[i].p.y < endpoints[corner].p.y))
-- corner = i;
--
-- double min_x = endpoints[corner].p.x;
-- int winner = -1;
-- Point p0 (0, 0);
-- for (unsigned int i = 0; i < num_endpoints; i++) {
-- const glyphy_arc_endpoint_t &endpoint = endpoints[i];
-- if (endpoint.d == GLYPHY_INFINITY || endpoint.d == 0 /* arcs only, not lines */) {
-- p0 = endpoint.p;
-- continue;
-- }
-- Arc arc (p0, endpoint.p, endpoint.d);
-- p0 = endpoint.p;
-+ double area = 0;
-+ for (unsigned int i = 1; i < num_endpoints; i++)
-+ {
-+ const glyphy_point_t &p0 = endpoints[i - 1].p;
-+ const glyphy_point_t &p1 = endpoints[i].p;
-+ double d = endpoints[i].d;
-
-- Point c = arc.center ();
-- double r = arc.radius ();
-- if (c.x - r < min_x && arc.wedge_contains_point (c - Vector (r, 0))) {
-- min_x = c.x - r;
-- winner = i;
-- }
-- }
-+ assert (d != GLYPHY_INFINITY);
-
-- if (winner == -1)
-- {
-- // Corner is lowest-x. Find the tangents of the two arcs connected to the
-- // corner and compare the tangent angles to get contour direction.
-- const glyphy_arc_endpoint_t ethis = endpoints[corner];
-- const glyphy_arc_endpoint_t eprev = endpoints[corner - 1];
-- const glyphy_arc_endpoint_t enext = endpoints[corner < num_endpoints - 1 ? corner + 1 : 1];
-- double in = (-Arc (eprev.p, ethis.p, ethis.d).tangents ().second).angle ();
-- double out = (+Arc (ethis.p, enext.p, enext.d).tangents ().first ).angle ();
-- return out > in;
-+ area += p0.x*p1.y - p0.y*p1.x;
-+ area -= .5 * d * ((p1.x-p0.x)*(p1.x-p0.x) + (p1.y-p0.y)*(p1.y-p0.y));
- }
-- else
-- {
-- // Easy.
-- return endpoints[winner].d < 0;
-- }
--
-- return false;
-+ return area < 0;
- }
-
-
---
-2.5.0
-
-From 644c5bab6e7f0e5af8f42fa7a8075372716c66d3 Mon Sep 17 00:00:00 2001
-From: Behdad Esfahbod <behdad@behdad.org>
-Date: Thu, 6 Aug 2015 15:49:37 +0100
-Subject: [PATCH 3/6] Start handling fully-degenerate curves
-
----
- src/glyphy-arcs-bezier.hh | 7 +++++++
- src/glyphy-geometry.hh | 4 ++++
- 2 files changed, 11 insertions(+)
-
-diff --git a/src/glyphy-arcs-bezier.hh b/src/glyphy-arcs-bezier.hh
-index ab729cb..32b7c8c 100644
---- a/src/glyphy-arcs-bezier.hh
-+++ b/src/glyphy-arcs-bezier.hh
-@@ -103,6 +103,13 @@ class ArcsBezierApproximatorSpringSystem
- double *perror,
- unsigned int max_segments = 100)
- {
-+ /* Handle fully-degenerate cases. */
-+ Vector v1 (b.p1 - b.p0);
-+ Vector v2 (b.p2 - b.p0);
-+ Vector v3 (b.p3 - b.p0);
-+ if (fabs (v1.cross(v2)) < GLYPHY_EPSILON && fabs (v2.cross(v3)) < GLYPHY_EPSILON)
-+ ;//TODO
-+
- std::vector<double> t;
- std::vector<double> e;
- double max_e, min_e;
-diff --git a/src/glyphy-geometry.hh b/src/glyphy-geometry.hh
-index f5f6003..3c60856 100644
---- a/src/glyphy-geometry.hh
-+++ b/src/glyphy-geometry.hh
-@@ -99,6 +99,7 @@ struct Vector {
- inline const Vector normal (void) const; /* ortho().normalized() */
- inline double angle (void) const;
-
-+ inline double cross (const Vector &other) const;
- inline const Vector rebase (const Vector &bx, const Vector &by) const;
- inline const Vector rebase (const Vector &bx) const;
-
-@@ -345,6 +346,9 @@ inline double Vector::angle (void) const {
- return atan2 (dy, dx);
- }
-
-+inline double Vector::cross (const Vector &other) const {
-+ return dx * other.dy - dy * other.dx;
-+}
- inline const Vector Vector::rebase (const Vector &bx,
- const Vector &by) const {
- return Vector (*this * bx, *this * by);
---
-2.5.0
-
-From 5667ab11a3d5f57bb89c4e8970d26b940d36964a Mon Sep 17 00:00:00 2001
-From: Behdad Esfahbod <behdad@behdad.org>
-Date: Thu, 6 Aug 2015 15:51:15 +0100
-Subject: [PATCH 4/6] Simplify winding()
-
----
- src/glyphy-outline.cc | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/src/glyphy-outline.cc b/src/glyphy-outline.cc
-index ef71247..7fded28 100644
---- a/src/glyphy-outline.cc
-+++ b/src/glyphy-outline.cc
-@@ -69,8 +69,8 @@ winding (const glyphy_arc_endpoint_t *endpoints,
-
- assert (d != GLYPHY_INFINITY);
-
-- area += p0.x*p1.y - p0.y*p1.x;
-- area -= .5 * d * ((p1.x-p0.x)*(p1.x-p0.x) + (p1.y-p0.y)*(p1.y-p0.y));
-+ area += Vector(p0).cross (Vector(p1));
-+ area -= .5 * d * (Point(p1) - Point(p0)).len2 ();
- }
- return area < 0;
- }
---
-2.5.0
-
-From 16fa0a713295a76f3075e6732007dca2dd38d11e Mon Sep 17 00:00:00 2001
-From: Behdad Esfahbod <behdad@behdad.org>
-Date: Thu, 6 Aug 2015 16:00:19 +0100
-Subject: [PATCH 5/6] Better handle fully-degenerate curves
-
----
- src/glyphy-arcs-bezier.hh | 9 ++++++++-
- 1 file changed, 8 insertions(+), 1 deletion(-)
-
-diff --git a/src/glyphy-arcs-bezier.hh b/src/glyphy-arcs-bezier.hh
-index 32b7c8c..ac210c0 100644
---- a/src/glyphy-arcs-bezier.hh
-+++ b/src/glyphy-arcs-bezier.hh
-@@ -108,7 +108,14 @@ class ArcsBezierApproximatorSpringSystem
- Vector v2 (b.p2 - b.p0);
- Vector v3 (b.p3 - b.p0);
- if (fabs (v1.cross(v2)) < GLYPHY_EPSILON && fabs (v2.cross(v3)) < GLYPHY_EPSILON)
-- ;//TODO
-+ {
-+ /* Curve has no area. If endpoints are NOT the same, replace with single
-+ * line segment. Otherwise fully skip. */
-+ arcs.clear ();
-+ if (b.p0 != b.p1)
-+ arcs.push_back (Arc (b.p0, b.p1, 0));
-+ return;
-+ }
-
- std::vector<double> t;
- std::vector<double> e;
---
-2.5.0
-
generated by cgit (git 2.34.1) at 2025-02-12 14:21:53 +0000