2009-04-17 17:39:31 +02:00
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/*
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* color.h - color functions header
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*
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* Copyright © 2008-2009 Julien Danjou <julien@danjou.info>
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* Copyright © 2009 Uli Schlachter <psychon@znc.in>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef AWESOME_COLOR_H
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#define AWESOME_COLOR_H
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2009-04-18 14:00:34 +02:00
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#include <xcb/xcb.h>
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#include <stdbool.h>
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2009-06-19 17:01:01 +02:00
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#include <lua.h>
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2009-04-17 17:39:31 +02:00
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typedef struct
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{
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uint32_t pixel;
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uint16_t red;
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uint16_t green;
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uint16_t blue;
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2018-03-03 10:56:25 +01:00
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uint16_t alpha;
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2009-04-17 17:39:31 +02:00
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bool initialized;
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2010-10-06 20:14:19 +02:00
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} color_t;
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2009-04-17 17:39:31 +02:00
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typedef struct
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{
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2010-09-10 11:27:40 +02:00
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xcb_alloc_color_cookie_t cookie_hexa;
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2010-10-06 20:14:19 +02:00
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color_t *color;
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2010-09-10 11:27:40 +02:00
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bool has_error;
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2009-04-17 17:39:31 +02:00
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const char *colstr;
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2010-10-06 20:14:19 +02:00
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} color_init_request_t;
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2009-04-17 17:39:31 +02:00
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Make alpha work on window borders
Up to now, we always asked the X11 server for color allocation ("which
pixel value corresponds to (r,g,b)?", an AllocCollor request).
This commit adds direct support for TrueColor and DirectColor visuals.
In such a visual, the X11 server gives tells us where the red, green,
and blue color components are in a pixel value and we can then just
directly compute the pixel value.
Additionally, this commit adds code that assumes that in a depth=32
visual, the remaining values (after handling red, green, blue) is the
alpha channel for colors. Thus, this adds support for transparent client
borders.
This commit also touches code for the systray. However, the systray must
always use the X11 server's default visual and that one always(?) has
depth=24, i.e. does not support an alpha channel. Thus, the systray
background still cannot be transparent.
Also, in theory this commit should support visuals where some color
component does not have 8 bits, for example RGB565. However, this is
just theoretic and I have no idea how to actually test this (without
jumping through too many hoops).
Fixes: https://github.com/awesomeWM/awesome/issues/162
Signed-off-by: Uli Schlachter <psychon@znc.in>
2018-03-02 14:16:51 +01:00
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color_init_request_t color_init_unchecked(color_t *, const char *, ssize_t, xcb_visualtype_t *visual);
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2010-10-06 20:14:19 +02:00
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bool color_init_reply(color_init_request_t);
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2009-04-17 17:39:31 +02:00
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2010-10-06 20:14:19 +02:00
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int luaA_pushcolor(lua_State *, const color_t);
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2009-06-19 17:01:01 +02:00
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2009-04-17 17:39:31 +02:00
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#endif
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2011-09-11 16:50:01 +02:00
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// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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