mirror of
https://github.com/gnif/LookingGlass.git
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108 lines
2.8 KiB
C
108 lines
2.8 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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#define _GNU_SOURCE
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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 <errno.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include <wayland-client.h>
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#include "common/debug.h"
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static const uint32_t cursorBitmap[] = {
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0x000000, 0x000000, 0x000000, 0x000000,
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0x000000, 0xFFFFFF, 0xFFFFFF, 0x000000,
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0x000000, 0xFFFFFF, 0xFFFFFF, 0x000000,
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0x000000, 0x000000, 0x000000, 0x000000,
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};
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static struct wl_buffer * createCursorBuffer(void)
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{
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int fd = memfd_create("lg-cursor", 0);
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if (fd < 0)
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{
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DEBUG_ERROR("Failed to create cursor shared memory: %d", errno);
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return NULL;
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}
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struct wl_buffer * result = NULL;
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if (ftruncate(fd, sizeof cursorBitmap) < 0)
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{
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DEBUG_ERROR("Failed to ftruncate cursor shared memory: %d", errno);
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goto fail;
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}
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void * shm_data = mmap(NULL, sizeof cursorBitmap, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (shm_data == MAP_FAILED)
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{
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DEBUG_ERROR("Failed to map memory for cursor: %d", errno);
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goto fail;
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}
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struct wl_shm_pool * pool = wl_shm_create_pool(wlWm.shm, fd, sizeof cursorBitmap);
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result = wl_shm_pool_create_buffer(pool, 0, 4, 4, 16, WL_SHM_FORMAT_XRGB8888);
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wl_shm_pool_destroy(pool);
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memcpy(shm_data, cursorBitmap, sizeof cursorBitmap);
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munmap(shm_data, sizeof cursorBitmap);
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fail:
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close(fd);
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return result;
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}
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bool waylandCursorInit(void)
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{
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if (!wlWm.compositor)
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{
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DEBUG_ERROR("Compositor missing wl_compositor, will not proceed");
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return false;
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}
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wlWm.cursorBuffer = createCursorBuffer();
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if (wlWm.cursorBuffer)
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{
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wlWm.cursor = wl_compositor_create_surface(wlWm.compositor);
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wl_surface_attach(wlWm.cursor, wlWm.cursorBuffer, 0, 0);
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wl_surface_commit(wlWm.cursor);
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}
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return true;
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}
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void waylandCursorFree(void)
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{
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if (wlWm.cursor)
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wl_surface_destroy(wlWm.cursor);
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if (wlWm.cursorBuffer)
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wl_buffer_destroy(wlWm.cursorBuffer);
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}
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void waylandShowPointer(bool show)
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{
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wlWm.showPointer = show;
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wl_pointer_set_cursor(wlWm.pointer, wlWm.pointerEnterSerial, show ? wlWm.cursor : NULL, 0, 0);
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}
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