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/*
* lws abstract display
*
* Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <libwebsockets.h>
static void
sul_autodim_cb(lws_sorted_usec_list_t *sul)
{
lws_display_state_t *lds = lws_container_of(sul, lws_display_state_t,
sul_autodim);
int next_ms = -1;
/* we fire both to dim and to blank... if already in dim state, blank */
switch (lds->state) {
case LWSDISPS_BECOMING_ACTIVE:
lws_display_state_set_brightness(lds, lds->disp->bl_active);
lds->state = LWSDISPS_ACTIVE;
next_ms = lds->autodim_ms;
break;
case LWSDISPS_ACTIVE:
/* active -> autodimmed */
lds->state = LWSDISPS_AUTODIMMED;
next_ms = lds->off_ms;
lws_display_state_set_brightness(lds, lds->disp->bl_dim);
break;
case LWSDISPS_AUTODIMMED:
/* dimmed -> OFF */
lws_display_state_set_brightness(lds, &lws_pwmseq_static_off);
lds->state = LWSDISPS_GOING_OFF;
next_ms = 600;
break;
case LWSDISPS_GOING_OFF:
/* off dimming completed, actual display OFF */
lws_display_state_off(lds);
return;
default:
return;
}
if (next_ms >= 0)
lws_sul_schedule(lds->ctx, 0, &lds->sul_autodim, sul_autodim_cb,
next_ms * LWS_US_PER_MS);
}
void
lws_display_state_init(lws_display_state_t *lds, struct lws_context *ctx,
int dim_ms, int off_ms, struct lws_led_state *bl_lcs,
const lws_display_t *disp)
{
memset(lds, 0, sizeof(*lds));
lds->disp = disp;
lds->ctx = ctx;
lds->autodim_ms = dim_ms;
lds->off_ms = off_ms;
lds->bl_lcs = bl_lcs;
lds->state = LWSDISPS_OFF;
lws_led_transition(lds->bl_lcs, "backlight", &lws_pwmseq_static_off,
&lws_pwmseq_static_on);
disp->init(disp);
}
void
lws_display_state_set_brightness(lws_display_state_t *lds,
const lws_led_sequence_def_t *pwmseq)
{
lws_led_transition(lds->bl_lcs, "backlight", pwmseq,
lds->disp->bl_transition);
}
void
lws_display_state_active(lws_display_state_t *lds)
{
int waiting_ms;
if (lds->state == LWSDISPS_OFF) {
/* power us up */
lds->disp->power(lds->disp, 1);
lds->state = LWSDISPS_BECOMING_ACTIVE;
waiting_ms = lds->disp->latency_wake_ms;
} else {
if (lds->state != LWSDISPS_ACTIVE)
lws_display_state_set_brightness(lds,
lds->disp->bl_active);
lds->state = LWSDISPS_ACTIVE;
waiting_ms = lds->autodim_ms;
}
/* reset the autodim timer */
if (waiting_ms >= 0)
lws_sul_schedule(lds->ctx, 0, &lds->sul_autodim, sul_autodim_cb,
waiting_ms * LWS_US_PER_MS);
}
void
lws_display_state_off(lws_display_state_t *lds)
{
lds->disp->power(lds->disp, 0);
lws_sul_cancel(&lds->sul_autodim);
lds->state = LWSDISPS_OFF;
}
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