LookingGlass/client/displayservers/Wayland/output.c

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/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2021 Guanzhong Chen (quantum2048@gmail.com)
Copyright (C) 2021 Tudor Brindus (contact@tbrindus.ca)
https://looking-glass.io
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 program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "wayland.h"
#include <stdbool.h>
#include <string.h>
#include <wayland-client.h>
#include "common/debug.h"
static void outputGeometryHandler(void * data, struct wl_output * output, int32_t x, int32_t y,
int32_t physical_width, int32_t physical_height, int32_t subpixel, const char * make,
const char * model, int32_t output_transform)
{
// Do nothing.
}
static void outputModeHandler(void * data, struct wl_output * wl_output, uint32_t flags,
int32_t width, int32_t height, int32_t refresh)
{
// Do nothing.
}
static void outputDoneHandler(void * data, struct wl_output * output)
{
// Do nothing.
}
static void outputScaleHandler(void * opaque, struct wl_output * output, int32_t scale)
{
struct WaylandOutput * node = opaque;
node->scale = scale;
waylandWindowUpdateScale();
}
static const struct wl_output_listener outputListener = {
.geometry = outputGeometryHandler,
.mode = outputModeHandler,
.done = outputDoneHandler,
.scale = outputScaleHandler,
};
bool waylandOutputInit(void)
{
wl_list_init(&wlWm.outputs);
return true;
}
void waylandOutputFree(void)
{
struct WaylandOutput * node;
struct WaylandOutput * temp;
wl_list_for_each_safe(node, temp, &wlWm.outputs, link)
{
wl_output_release(node->output);
wl_list_remove(&node->link);
free(node);
}
}
void waylandOutputBind(uint32_t name, uint32_t version)
{
struct WaylandOutput * node = malloc(sizeof(struct WaylandOutput));
if (!node)
return;
if (version < 3)
{
DEBUG_WARN("wl_output version too old: expected 3, got %d", version);
return;
}
node->name = name;
node->scale = 0;
node->output = wl_registry_bind(wlWm.registry, name,
&wl_output_interface, 3);
if (!node->output)
{
DEBUG_ERROR("Failed to bind to wl_output %u\n", name);
free(node);
return;
}
wl_output_add_listener(node->output, &outputListener, node);
wl_list_insert(&wlWm.outputs, &node->link);
}
void waylandOutputTryUnbind(uint32_t name)
{
struct WaylandOutput * node;
wl_list_for_each(node, &wlWm.outputs, link)
{
if (node->name == name)
{
wl_output_release(node->output);
wl_list_remove(&node->link);
free(node);
break;
}
}
}
int32_t waylandOutputGetScale(struct wl_output * output)
{
struct WaylandOutput * node;
wl_list_for_each(node, &wlWm.outputs, link)
if (node->output == output)
return node->scale;
return 0;
}