mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-11 02:56:06 +00:00
71 lines
2.2 KiB
Diff
71 lines
2.2 KiB
Diff
commit a26655b3144ed273940486fc15ccdac12b0562ec
|
|
Author: Jeff Muizelaar <jmuizelaar@mozilla.com>
|
|
Date: Tue Mar 17 15:08:50 2009 -0400
|
|
|
|
Jeff Muizelaar noted that the treatment of edges differed with firefox's
|
|
canvas definition, which considers a point on any edge as inside. The
|
|
current implementation has a similar definition to that of flash, for
|
|
which the top and right edges are outside. Arguably, firefox has the more
|
|
intuitive definition here...
|
|
|
|
diff --git a/src/cairo-path-in-fill.c b/src/cairo-path-in-fill.c
|
|
index 21cd0bd..e641654 100644
|
|
--- a/src/cairo-path-in-fill.c
|
|
+++ b/src/cairo-path-in-fill.c
|
|
@@ -41,6 +41,7 @@ typedef struct cairo_in_fill {
|
|
int winding;
|
|
|
|
cairo_fixed_t x, y;
|
|
+ cairo_bool_t on_edge;
|
|
|
|
cairo_bool_t has_current_point;
|
|
cairo_point_t current_point;
|
|
@@ -58,6 +59,7 @@ _cairo_in_fill_init (cairo_in_fill_t *in_fill,
|
|
|
|
in_fill->x = _cairo_fixed_from_double (x);
|
|
in_fill->y = _cairo_fixed_from_double (y);
|
|
+ in_fill->on_edge = FALSE;
|
|
|
|
in_fill->has_current_point = FALSE;
|
|
in_fill->current_point.x = 0;
|
|
@@ -103,6 +105,9 @@ _cairo_in_fill_add_edge (cairo_in_fill_t *in_fill,
|
|
{
|
|
int dir;
|
|
|
|
+ if (in_fill->on_edge)
|
|
+ return;
|
|
+
|
|
/* count the number of edge crossing to -∞ */
|
|
|
|
dir = 1;
|
|
@@ -116,6 +121,18 @@ _cairo_in_fill_add_edge (cairo_in_fill_t *in_fill,
|
|
dir = -1;
|
|
}
|
|
|
|
+ /* First check whether the query is on an edge */
|
|
+ if ((p1->x == in_fill->x && p1->x == in_fill->y) ||
|
|
+ (p2->x == in_fill->x && p2->x == in_fill->y) ||
|
|
+ (! (p2->y < in_fill->y || p1->y > in_fill->y) &&
|
|
+ ! (p1->x > in_fill->x && p2->x > in_fill->x) &&
|
|
+ ! (p1->x < in_fill->x && p2->x < in_fill->x) &&
|
|
+ edge_compare_for_y_against_x (p1, p2, in_fill->y, in_fill->x) == 0))
|
|
+ {
|
|
+ in_fill->on_edge = TRUE;
|
|
+ return;
|
|
+ }
|
|
+
|
|
/* edge is entirely above or below, note the shortening rule */
|
|
if (p2->y <= in_fill->y || p1->y > in_fill->y)
|
|
return;
|
|
@@ -246,7 +263,9 @@ _cairo_path_fixed_in_fill (cairo_path_fixed_t *path,
|
|
|
|
_cairo_in_fill_close_path (&in_fill);
|
|
|
|
- switch (fill_rule) {
|
|
+ if (in_fill.on_edge) {
|
|
+ *is_inside = TRUE;
|
|
+ } else switch (fill_rule) {
|
|
case CAIRO_FILL_RULE_EVEN_ODD:
|
|
*is_inside = in_fill.winding & 1;
|
|
break;
|