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137 lines
3.1 KiB
C
137 lines
3.1 KiB
C
/* sp-color-cycle.c
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*
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* Copyright (C) 2016 Christian Hergert <chergert@redhat.com>
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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 3 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define G_LOG_DOMAIN "sp-color-cycle"
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#include "sp-color-cycle.h"
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G_DEFINE_BOXED_TYPE (SpColorCycle, sp_color_cycle, sp_color_cycle_ref, sp_color_cycle_unref)
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static const gchar *default_colors[] = {
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"#73d216",
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"#f57900",
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"#3465a4",
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"#ef2929",
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"#75507b",
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"#ce5c00",
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"#c17d11",
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"#cc0000",
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"#edd400",
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"#555753",
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"#4e9a06",
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"#204a87",
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"#5c3566",
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"#a40000",
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"#c4a000",
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"#8f5902",
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"#2e3436",
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"#8ae234",
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"#729fcf",
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"#ad7fa8",
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"#fce94f",
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"#fcaf3e",
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"#e9b96e",
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"#888a85",
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NULL
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};
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struct _SpColorCycle
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{
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volatile gint ref_count;
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GdkRGBA *colors;
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gsize n_colors;
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guint position;
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};
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static void
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sp_color_cycle_destroy (SpColorCycle *self)
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{
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g_free (self->colors);
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g_slice_free (SpColorCycle, self);
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}
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SpColorCycle *
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sp_color_cycle_new (void)
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{
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SpColorCycle *self;
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self = g_slice_new0 (SpColorCycle);
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self->ref_count = 1;
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self->n_colors = g_strv_length ((gchar **)default_colors);
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self->colors = g_new0 (GdkRGBA, self->n_colors);
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for (guint i = 0; default_colors[i]; i++)
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{
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if G_UNLIKELY (!gdk_rgba_parse (&self->colors[i], default_colors[i]))
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g_warning ("Failed to parse color %s into an RGBA", default_colors[i]);
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}
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return self;
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}
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SpColorCycle *
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sp_color_cycle_ref (SpColorCycle *self)
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{
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g_return_val_if_fail (self != NULL, NULL);
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g_return_val_if_fail (self->ref_count > 0, NULL);
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g_atomic_int_inc (&self->ref_count);
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return self;
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}
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void
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sp_color_cycle_unref (SpColorCycle *self)
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{
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g_return_if_fail (self != NULL);
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g_return_if_fail (self->ref_count > 0);
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if (g_atomic_int_dec_and_test (&self->ref_count))
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sp_color_cycle_destroy (self);
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}
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void
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sp_color_cycle_next (SpColorCycle *self,
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GdkRGBA *rgba)
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{
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g_return_if_fail (self != NULL);
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g_return_if_fail (self->position < self->n_colors);
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*rgba = self->colors[self->position];
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/*
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* TODO: Adjust color HSV/etc
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*
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* We could simply adjust the brightness/etc after we dispatch
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* a color so that we get darker as we go.
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*/
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self->position = (self->position + 1) % self->n_colors;
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}
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void
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sp_color_cycle_reset (SpColorCycle *self)
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{
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g_return_if_fail (self != NULL);
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for (guint i = 0; default_colors[i]; i++)
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{
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if G_UNLIKELY (!gdk_rgba_parse (&self->colors[i], default_colors[i]))
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g_warning ("Failed to parse color %s into an RGBA", default_colors[i]);
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}
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self->position = 0;
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}
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