pidgin/pidgin

Update Meson to newer standards

2021-10-18, Elliott Sales de Andrade
1653402dd94e
Update Meson to newer standards

* Remove checks for old Meson
We require 0.56.0 now.
* Remove deprecated Meson call
* Update calls to `pkgconfig.generate`
The library to wrap should be passed as first positional argument, and we can
pass actual dependencies as the runtime requirements. We can't pass things that
might be subprojects as dependencies, which may be a Meson bug, so pass those
ones as strings.

Testing Done:
Re-configured and looked at the pkgconfig files.

Reviewed at https://reviews.imfreedom.org/r/1064/
/*
* Pidgin - Internet Messenger
* Copyright (C) Pidgin Developers <devel@pidgin.im>
*
* Pidgin is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library; if not, see <https://www.gnu.org/licenses/>.
*/
#include "pidgincolor.h"
#include "pidginstylecontext.h"
/******************************************************************************
* Public API
*****************************************************************************/
void
pidgin_color_calculate_for_text(const gchar *text, GdkRGBA *color) {
GdkRGBA background;
GChecksum *checksum = NULL;
guchar digest[20];
gsize digest_len = sizeof(digest);
gdouble hue = 0, red = 0, green = 0, blue = 0;
g_return_if_fail(color != NULL);
pidgin_style_context_get_background_color(&background);
/* hash the string and get the first 2 bytes of the digest */
checksum = g_checksum_new(G_CHECKSUM_SHA1);
g_checksum_update(checksum, (const guchar *)text, -1);
g_checksum_get_digest(checksum, digest, &digest_len);
g_checksum_free(checksum);
/* Calculate the hue based on the digest. We need a value between 0 and 1
* so we divide the value by 65535 which is the maximum value for 2 bytes.
*/
hue = (digest[0] << 8 | digest[1]) / 65535.0;
/* Get the rgb values for the hue at full saturation and value. */
gtk_hsv_to_rgb(hue, 1.0, 1.0, &red, &green, &blue);
/* Finally calculate the color summing 20% of the inverted background color
* with 80% of the color.
*/
color->red = (0.2 * (1 - background.red)) + (0.8 * red);
color->green = (0.2 * (1 - background.green)) + (0.8 * green);
color->blue = (0.2 * (1 - background.blue)) + (0.8 * blue);
color->alpha = 1.0;
}