mirror of
https://github.com/gnif/LookingGlass.git
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160 lines
4.0 KiB
C
160 lines
4.0 KiB
C
/**
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* Looking Glass
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* Copyright (C) 2017-2021 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "wayland.h"
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#include <stdbool.h>
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#include <string.h>
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#include <wayland-client.h>
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#include "app.h"
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#include "common/debug.h"
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#include "common/event.h"
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// Surface-handling listeners.
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void waylandWindowUpdateScale(void)
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{
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wl_fixed_t maxScale = 0;
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struct SurfaceOutput * node;
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wl_list_for_each(node, &wlWm.surfaceOutputs, link)
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{
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wl_fixed_t scale = waylandOutputGetScale(node->output);
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if (scale > maxScale)
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maxScale = scale;
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}
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if (maxScale)
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{
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wlWm.scale = maxScale;
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wlWm.fractionalScale = wl_fixed_from_int(wl_fixed_to_int(maxScale)) != maxScale;
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wlWm.needsResize = true;
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app_invalidateWindow();
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waylandStopWaitFrame();
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}
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}
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static void wlSurfaceEnterHandler(void * data, struct wl_surface * surface, struct wl_output * output)
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{
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struct SurfaceOutput * node = malloc(sizeof(struct SurfaceOutput));
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node->output = output;
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wl_list_insert(&wlWm.surfaceOutputs, &node->link);
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waylandWindowUpdateScale();
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}
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static void wlSurfaceLeaveHandler(void * data, struct wl_surface * surface, struct wl_output * output)
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{
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struct SurfaceOutput * node;
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wl_list_for_each(node, &wlWm.surfaceOutputs, link)
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if (node->output == output)
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{
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wl_list_remove(&node->link);
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break;
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}
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waylandWindowUpdateScale();
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}
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static const struct wl_surface_listener wlSurfaceListener = {
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.enter = wlSurfaceEnterHandler,
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.leave = wlSurfaceLeaveHandler,
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};
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bool waylandWindowInit(const char * title, bool fullscreen, bool maximize, bool borderless)
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{
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wlWm.scale = wl_fixed_from_int(1);
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wlWm.frameEvent = lgCreateEvent(true, 0);
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if (!wlWm.frameEvent)
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{
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DEBUG_ERROR("Failed to initialize event for waitFrame");
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return false;
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}
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lgSignalEvent(wlWm.frameEvent);
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if (!wlWm.compositor)
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{
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DEBUG_ERROR("Compositor missing wl_compositor (version 3+), will not proceed");
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return false;
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}
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wlWm.surface = wl_compositor_create_surface(wlWm.compositor);
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if (!wlWm.surface)
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{
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DEBUG_ERROR("Failed to create wl_surface");
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return false;
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}
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wl_surface_add_listener(wlWm.surface, &wlSurfaceListener, NULL);
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if (!waylandShellInit(title, fullscreen, maximize, borderless))
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return false;
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wl_surface_commit(wlWm.surface);
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return true;
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}
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void waylandWindowFree(void)
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{
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wl_surface_destroy(wlWm.surface);
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lgFreeEvent(wlWm.frameEvent);
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}
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void waylandSetWindowSize(int x, int y)
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{
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// FIXME: implement.
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}
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bool waylandIsValidPointerPos(int x, int y)
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{
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return x >= 0 && x < wlWm.width && y >= 0 && y < wlWm.height;
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}
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static void frameHandler(void * opaque, struct wl_callback * callback, unsigned int data)
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{
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lgSignalEvent(wlWm.frameEvent);
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wl_callback_destroy(callback);
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}
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static const struct wl_callback_listener frame_listener = {
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.done = frameHandler,
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};
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void waylandWaitFrame(void)
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{
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lgWaitEvent(wlWm.frameEvent, TIMEOUT_INFINITE);
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struct wl_callback * callback = wl_surface_frame(wlWm.surface);
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if (callback)
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wl_callback_add_listener(callback, &frame_listener, NULL);
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}
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void waylandSkipFrame(void)
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{
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// If we decided to not render, we must commit the surface so that the callback is registered.
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wl_surface_commit(wlWm.surface);
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}
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void waylandStopWaitFrame(void)
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{
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lgSignalEvent(wlWm.frameEvent);
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}
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