39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
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*
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*/
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#include <stdlib.h>
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#include <stdint.h>
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#include "libi3.h"
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/*
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* Returns the colorpixel to use for the given hex color (think of HTML). Only
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* works for true-color (vast majority of cases) at the moment, avoiding a
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* roundtrip to X11.
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*
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* The hex_color has to start with #, for example #FF00FF.
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*
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* NOTE that get_colorpixel() does _NOT_ check the given color code for validity.
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* This has to be done by the caller.
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*
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* NOTE that this function may in the future rely on a global xcb_connection_t
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* variable called 'conn' to be present.
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*
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*/
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uint32_t get_colorpixel(const char *hex) {
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char strgroups[3][3] = {{hex[1], hex[2], '\0'},
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{hex[3], hex[4], '\0'},
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{hex[5], hex[6], '\0'}};
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uint8_t r = strtol(strgroups[0], NULL, 16);
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uint8_t g = strtol(strgroups[1], NULL, 16);
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uint8_t b = strtol(strgroups[2], NULL, 16);
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/* We set the first 8 bits high to have 100% opacity in case of a 32 bit
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* color depth visual. */
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return (0xFF << 24) | (r << 16 | g << 8 | b);
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}
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