From: Eli Zaretskii <eliz@gnu.org>
To: Jason Rumney <jasonr@gnu.org>
Cc: Chong Yidong <cyd@stupidchicken.com>, emacs-devel@gnu.org
Subject: Re: Box graphic tweak
Date: Sat, 27 Nov 2010 13:19:16 +0200 [thread overview]
Message-ID: <83pqtr580b.fsf@gnu.org> (raw)
In-Reply-To: <878w29jmg5.fsf@stupidchicken.com>
> From: Chong Yidong <cyd@stupidchicken.com>
> Date: Fri, 08 Oct 2010 01:14:02 -0400
>
> I just made a tweak to the way 3D boxes are drawn, to make them more
> legible. The W32 code looks like it could use a similar change, but I
> didn't want to do the translation without being able to test it. Could
> someone on W32 take a look? Thanks.
>
> * xterm.c (x_draw_relief_rect): If box width is larger than 1,
> draw the outermost line using the black relief, for legibility.
> Omit drawing the four corner pixels.
Jason, could you please do this? I tried, but the differences between
the X and the w32 code are substantial to the degree that sufficient
knowledge of the underlying primitives is required to DTRT, and I lack
that knowledge.
Thanks.
For reference, here are the diffs for the changes done by Chong:
=== modified file 'src/xterm.c'
--- src/xterm.c 2010-10-03 15:39:21 +0000
+++ src/xterm.c 2010-10-09 03:30:31 +0000
@@ -1942,18 +1942,38 @@ x_draw_relief_rect (struct frame *f,
gc = f->output_data.x->black_relief.gc;
XSetClipRectangles (dpy, gc, 0, 0, clip_rect, 1, Unsorted);
+ /* This code is more complicated than it has to be, because of two
+ minor hacks to make the boxes look nicer: (i) if width > 1, draw
+ the outermost line using the black relief. (ii) Omit the four
+ corner pixels. */
+
/* Top. */
if (top_p)
- for (i = 0; i < width; ++i)
- XDrawLine (dpy, window, gc,
- left_x + i * left_p, top_y + i,
- right_x + 1 - i * right_p, top_y + i);
+ {
+ if (width == 1)
+ XDrawLine (dpy, window, gc,
+ left_x + (left_p ? 1 : 0), top_y,
+ right_x + (right_p ? 0 : 1), top_y);
+
+ for (i = 1; i < width; ++i)
+ XDrawLine (dpy, window, gc,
+ left_x + i * left_p, top_y + i,
+ right_x + 1 - i * right_p, top_y + i);
+ }
/* Left. */
if (left_p)
- for (i = 0; i < width; ++i)
- XDrawLine (dpy, window, gc,
- left_x + i, top_y + i, left_x + i, bottom_y - i + 1);
+ {
+ if (width == 1)
+ XDrawLine (dpy, window, gc, left_x, top_y + 1, left_x, bottom_y);
+
+ XClearArea (dpy, window, left_x, top_y, 1, 1, False);
+ XClearArea (dpy, window, left_x, bottom_y, 1, 1, False);
+
+ for (i = (width > 1 ? 1 : 0); i < width; ++i)
+ XDrawLine (dpy, window, gc,
+ left_x + i, top_y + i, left_x + i, bottom_y - i + 1);
+ }
XSetClipMask (dpy, gc, None);
if (raised_p)
@@ -1962,18 +1982,40 @@ x_draw_relief_rect (struct frame *f,
gc = f->output_data.x->white_relief.gc;
XSetClipRectangles (dpy, gc, 0, 0, clip_rect, 1, Unsorted);
+ if (width > 1)
+ {
+ /* Outermost top line. */
+ if (top_p)
+ XDrawLine (dpy, window, gc,
+ left_x + (left_p ? 1 : 0), top_y,
+ right_x + (right_p ? 0 : 1), top_y);
+
+ /* Outermost left line. */
+ if (left_p)
+ XDrawLine (dpy, window, gc, left_x, top_y + 1, left_x, bottom_y);
+ }
+
/* Bottom. */
if (bot_p)
- for (i = 0; i < width; ++i)
+ {
XDrawLine (dpy, window, gc,
- left_x + i * left_p, bottom_y - i,
- right_x + 1 - i * right_p, bottom_y - i);
+ left_x + (left_p ? 1 : 0), bottom_y,
+ right_x + (right_p ? 0 : 1), bottom_y);
+ for (i = 1; i < width; ++i)
+ XDrawLine (dpy, window, gc,
+ left_x + i * left_p, bottom_y - i,
+ right_x + 1 - i * right_p, bottom_y - i);
+ }
/* Right. */
if (right_p)
- for (i = 0; i < width; ++i)
- XDrawLine (dpy, window, gc,
- right_x - i, top_y + i + 1, right_x - i, bottom_y - i);
+ {
+ XClearArea (dpy, window, right_x, top_y, 1, 1, False);
+ XClearArea (dpy, window, right_x, bottom_y, 1, 1, False);
+ for (i = 0; i < width; ++i)
+ XDrawLine (dpy, window, gc,
+ right_x - i, top_y + i + 1, right_x - i, bottom_y - i);
+ }
XSetClipMask (dpy, gc, None);
}
prev parent reply other threads:[~2010-11-27 11:19 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-08 5:14 Box graphic tweak Chong Yidong
2010-10-08 8:54 ` Eli Zaretskii
2010-10-08 13:59 ` Chong Yidong
2010-10-08 14:13 ` Miles Bader
2010-10-09 3:46 ` Chong Yidong
2010-10-14 4:20 ` Kenichi Handa
2010-10-14 4:34 ` Drew Adams
2010-10-14 4:45 ` Miles Bader
2010-10-14 4:51 ` Kenichi Handa
2010-10-14 6:04 ` Chong Yidong
2010-10-08 15:18 ` Drew Adams
2010-11-27 11:19 ` Eli Zaretskii [this message]
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