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add utility function gdk_quartz_fix_cap_not_last_line() which fixes the

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2007-06-08  Michael Natterer  <mitch@imendio.com>

	* gdk/quartz/gdkdrawable-quartz.c: add utility function
	gdk_quartz_fix_cap_not_last_line() which fixes the coordinates for
	GDK_CAP_NOT_LAST lines at least for horizontal and vertical lines.

	(gdk_quartz_draw_segments)
	(gdk_quartz_draw_lines): use it here.


svn path=/trunk/; revision=18080
This commit is contained in:
Michael Natterer 2007-06-07 22:26:27 +00:00 committed by Michael Natterer
parent dde0d5ffa5
commit 6c3637ea3e
2 changed files with 63 additions and 4 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2007-06-08 Michael Natterer <mitch@imendio.com>
* gdk/quartz/gdkdrawable-quartz.c: add utility function
gdk_quartz_fix_cap_not_last_line() which fixes the coordinates for
GDK_CAP_NOT_LAST lines at least for horizontal and vertical lines.
(gdk_quartz_draw_segments)
(gdk_quartz_draw_lines): use it here.
2007-06-07 Michael Natterer <mitch@imendio.com>
* gdk/quartz/gdkgc-quartz.c: add gdk_gc_quartz_init() and set

58
gdk/quartz/gdkdrawable-quartz.c
View File

@ -366,6 +366,33 @@ gdk_quartz_draw_points (GdkDrawable *drawable,
gdk_quartz_drawable_release_context (drawable, context);
}
static inline void
gdk_quartz_fix_cap_not_last_line (GdkGCQuartz *private,
gint x1,
gint y1,
gint x2,
gint y2,
gint *xfix,
gint *yfix)
{
*xfix = 0;
*yfix = 0;
if (private->cap_style == GDK_CAP_NOT_LAST && private->line_width == 0)
{
/* fix only vertical and horizontal lines for now */
if (y1 == y2 && x1 != x2)
{
*xfix = (x1 < x2) ? -1 : 1;
}
else if (x1 == x2 && y1 != y2)
{
*yfix = (y1 < y2) ? -1 : 1;
}
}
}
static void
gdk_quartz_draw_segments (GdkDrawable *drawable,
GdkGC *gc,
@ -373,18 +400,28 @@ gdk_quartz_draw_segments (GdkDrawable *drawable,
gint nsegs)
{
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
GdkGCQuartz *private;
int i;
if (!context)
return;
private = GDK_GC_QUARTZ (gc);
_gdk_quartz_gc_update_cg_context (gc, drawable, context,
GDK_QUARTZ_CONTEXT_STROKE);
for (i = 0; i < nsegs; i++)
{
gint xfix, yfix;
gdk_quartz_fix_cap_not_last_line (private,
segs[i].x1, segs[i].y1,
segs[i].x2, segs[i].y2,
&xfix, &yfix);
CGContextMoveToPoint (context, segs[i].x1 + 0.5, segs[i].y1 + 0.5);
CGContextAddLineToPoint (context, segs[i].x2 + 0.5, segs[i].y2 + 0.5);
CGContextAddLineToPoint (context, segs[i].x2 + 0.5 + xfix, segs[i].y2 + 0.5 + yfix);
}
CGContextStrokePath (context);
@ -399,19 +436,32 @@ gdk_quartz_draw_lines (GdkDrawable *drawable,
gint npoints)
{
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
int i;
GdkGCQuartz *private;
gint xfix, yfix;
gint i;
if (!context)
return;
private = GDK_GC_QUARTZ (gc);
_gdk_quartz_gc_update_cg_context (gc, drawable, context,
GDK_QUARTZ_CONTEXT_STROKE);
GDK_QUARTZ_CONTEXT_STROKE);
CGContextMoveToPoint (context, points[0].x + 0.5, points[0].y + 0.5);
for (i = 1; i < npoints; i++)
for (i = 1; i < npoints - 1; i++)
CGContextAddLineToPoint (context, points[i].x + 0.5, points[i].y + 0.5);
gdk_quartz_fix_cap_not_last_line (private,
points[npoints - 2].x, points[npoints - 2].y,
points[npoints - 1].x, points[npoints - 1].y,
&xfix, &yfix);
CGContextAddLineToPoint (context,
points[npoints - 1].x + 0.5 + xfix,
points[npoints - 1].y + 0.5 + yfix);
CGContextStrokePath (context);
gdk_quartz_drawable_release_context (drawable, context);