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https://github.com/gnif/LookingGlass.git
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b3ca872cef
Currently, we scale the desktop up to the next largest integer, and rely on the wayland compositor to scale it back down to the correct size. This is obviously undesirable. In this commit, we attempt to detect the actual fractional scaling by finding the current active mode in wl_output, and dividing it by the logical screen size reported by xdg_output, taking into consideration screen rotation. We then use wp_viewporter to set the exact buffer and viewport sizes if fractional scaling is needed.
137 lines
3.5 KiB
C
137 lines
3.5 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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}
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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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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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}
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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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LGEvent * event = opaque;
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lgSignalEvent(event);
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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 waylandSignalNextFrame(LGEvent * event)
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{
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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, event);
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}
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