From d7dcbbc1758c29ca438dc358ca7e867d6f7a976c Mon Sep 17 00:00:00 2001 From: nyorain Date: Mon, 14 Aug 2017 18:19:42 +0200 Subject: [PATCH] Add wayland backend cursor support --- backend/meson.build | 1 + backend/wayland/os-compatibility.c | 154 +++++++++++++++++++++++++++++ backend/wayland/output.c | 96 ++++++++++++++++++ backend/wayland/wl_seat.c | 8 +- include/backend/wayland.h | 10 ++ 5 files changed, 268 insertions(+), 1 deletion(-) create mode 100644 backend/wayland/os-compatibility.c diff --git a/backend/meson.build b/backend/meson.build index dcf7837a..cea3076c 100644 --- a/backend/meson.build +++ b/backend/meson.build @@ -22,6 +22,7 @@ backend_files = files( 'wayland/output.c', 'wayland/registry.c', 'wayland/wl_seat.c', + 'wayland/os-compatibility.c', ) if systemd.found() diff --git a/backend/wayland/os-compatibility.c b/backend/wayland/os-compatibility.c new file mode 100644 index 00000000..cd268539 --- /dev/null +++ b/backend/wayland/os-compatibility.c @@ -0,0 +1,154 @@ +/* + * Copyright © 2012 Collabora, Ltd. + * + * 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 (including the + * next paragraph) 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. + */ + +#define _XOPEN_SOURCE 700 +#include +#include +#include +#include +#include +#include +#include +#include + +int +os_fd_set_cloexec(int fd) +{ + long flags; + + if (fd == -1) + return -1; + + flags = fcntl(fd, F_GETFD); + if (flags == -1) + return -1; + + if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) + return -1; + + return 0; +} + +static int +set_cloexec_or_close(int fd) +{ + if (os_fd_set_cloexec(fd) != 0) { + close(fd); + return -1; + } + return fd; +} + +static int +create_tmpfile_cloexec(char *tmpname) +{ + int fd; + +#ifdef HAVE_MKOSTEMP + fd = mkostemp(tmpname, O_CLOEXEC); + if (fd >= 0) + unlink(tmpname); +#else + fd = mkstemp(tmpname); + if (fd >= 0) { + fd = set_cloexec_or_close(fd); + unlink(tmpname); + } +#endif + + return fd; +} + +/* + * Create a new, unique, anonymous file of the given size, and + * return the file descriptor for it. The file descriptor is set + * CLOEXEC. The file is immediately suitable for mmap()'ing + * the given size at offset zero. + * + * The file should not have a permanent backing store like a disk, + * but may have if XDG_RUNTIME_DIR is not properly implemented in OS. + * + * The file name is deleted from the file system. + * + * The file is suitable for buffer sharing between processes by + * transmitting the file descriptor over Unix sockets using the + * SCM_RIGHTS methods. + * + * If the C library implements posix_fallocate(), it is used to + * guarantee that disk space is available for the file at the + * given size. If disk space is insufficient, errno is set to ENOSPC. + * If posix_fallocate() is not supported, program may receive + * SIGBUS on accessing mmap()'ed file contents instead. + */ +int +os_create_anonymous_file(off_t size) +{ + static const char template[] = "/wlroots-shared-XXXXXX"; + const char *path; + char *name; + int fd; + int ret; + + path = getenv("XDG_RUNTIME_DIR"); + if (!path) { + errno = ENOENT; + return -1; + } + + name = malloc(strlen(path) + sizeof(template)); + if (!name) + return -1; + + strcpy(name, path); + strcat(name, template); + + fd = create_tmpfile_cloexec(name); + + free(name); + + if (fd < 0) + return -1; + +#ifdef HAVE_POSIX_FALLOCATE + do { + ret = posix_fallocate(fd, 0, size); + } while (ret == EINTR); + if (ret != 0) { + close(fd); + errno = ret; + return -1; + } +#else + do { + ret = ftruncate(fd, size); + } while (ret < 0 && errno == EINTR); + if (ret < 0) { + close(fd); + return -1; + } +#endif + + return fd; +} diff --git a/backend/wayland/output.c b/backend/wayland/output.c index 767d1c6b..a95505dc 100644 --- a/backend/wayland/output.c +++ b/backend/wayland/output.c @@ -3,12 +3,17 @@ #include #include #include +#include +#include +#include #include #include #include #include #include "backend/wayland.h" +int os_create_anonymous_file(off_t size); + static struct wl_callback_listener frame_listener; static void surface_frame_callback(void *data, struct wl_callback *cb, uint32_t time) { @@ -46,9 +51,86 @@ static void wlr_wl_output_transform(struct wlr_output *_output, output->wlr_output.transform = transform; } +static bool wlr_wl_output_set_cursor(struct wlr_output *_output, + const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height) { + + struct wlr_wl_backend_output *output = (struct wlr_wl_backend_output *)_output; + struct wlr_wl_backend *backend = output->backend; + stride *= 4; // stride is given in pixels, we need it in bytes + + if (!backend->shm || !backend->pointer) { + wlr_log(L_INFO, "cannot set cursor, no shm or pointer"); + return false; + } + + if (!output->cursor_surface) { + output->cursor_surface = wl_compositor_create_surface(output->backend->compositor); + } + + uint32_t size = stride * height; + if (output->cursor_buf_size != size) { + if (output->cursor_buffer) { + wl_buffer_destroy(output->cursor_buffer); + } + + if (size > output->cursor_buf_size) { + if (output->cursor_pool) { + wl_shm_pool_destroy(output->cursor_pool); + output->cursor_pool = NULL; + munmap(output->cursor_data, output->cursor_buf_size); + } + } + + if (!output->cursor_pool) { + int fd = os_create_anonymous_file(size); + if (fd < 0) { + wlr_log_errno(L_INFO, "creating anonymous file for cursor buffer failed"); + return false; + } + + output->cursor_data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); + if (output->cursor_data == MAP_FAILED) { + close(fd); + wlr_log_errno(L_INFO, "mmap failed"); + return false; + } + + output->cursor_pool = wl_shm_create_pool(backend->shm, fd, size); + close(fd); + } + + output->cursor_buffer = wl_shm_pool_create_buffer(output->cursor_pool, + 0, width, height, stride, WL_SHM_FORMAT_ARGB8888); + output->cursor_buf_size = size; + } + + memcpy(output->cursor_data, buf, size); + wl_surface_attach(output->cursor_surface, output->cursor_buffer, 0, 0); + wl_surface_damage(output->cursor_surface, 0, 0, width, height); + wl_surface_commit(output->cursor_surface); + + wlr_wl_output_update_cursor(output, output->enter_serial); + return true; +} + static void wlr_wl_output_destroy(struct wlr_output *_output) { struct wlr_wl_backend_output *output = (struct wlr_wl_backend_output *)_output; wl_signal_emit(&output->backend->backend.events.output_remove, &output->wlr_output); + + if (output->cursor_buf_size != 0) { + assert(output->cursor_data); + assert(output->cursor_buffer); + assert(output->cursor_pool); + + wl_buffer_destroy(output->cursor_buffer); + munmap(output->cursor_data, output->cursor_buf_size); + wl_shm_pool_destroy(output->cursor_pool); + } + + if (output->cursor_surface) { + wl_surface_destroy(output->cursor_surface); + } + if (output->frame_callback) { wl_callback_destroy(output->frame_callback); } @@ -59,11 +141,25 @@ static void wlr_wl_output_destroy(struct wlr_output *_output) { free(output); } +void wlr_wl_output_update_cursor(struct wlr_wl_backend_output *output, uint32_t serial) { + if (output->cursor_surface && output->backend->pointer && serial) { + wl_pointer_set_cursor(output->backend->pointer, serial, + output->cursor_surface, 0, 0); + } +} + +bool wlr_wl_output_move_cursor(struct wlr_output *_output, int x, int y) { + // TODO: only return true if x == current x and y == current y + return true; +} + static struct wlr_output_impl output_impl = { .transform = wlr_wl_output_transform, .destroy = wlr_wl_output_destroy, .make_current = wlr_wl_output_make_current, .swap_buffers = wlr_wl_output_swap_buffers, + .set_cursor = wlr_wl_output_set_cursor, + .move_cursor = wlr_wl_output_move_cursor }; void handle_ping(void* data, struct wl_shell_surface* ssurface, uint32_t serial) { diff --git a/backend/wayland/wl_seat.c b/backend/wayland/wl_seat.c index 43e73dac..6e645a58 100644 --- a/backend/wayland/wl_seat.c +++ b/backend/wayland/wl_seat.c @@ -23,6 +23,8 @@ static void pointer_handle_enter(void *data, struct wl_pointer *wl_pointer, wlr_wl_output_for_surface(wlr_wl_dev->backend, surface); assert(output); wlr_wl_pointer->current_output = output; + wlr_wl_pointer->current_output->enter_serial = serial; + wlr_wl_output_update_cursor(wlr_wl_pointer->current_output, serial); } static void pointer_handle_leave(void *data, struct wl_pointer *wl_pointer, @@ -30,7 +32,10 @@ static void pointer_handle_leave(void *data, struct wl_pointer *wl_pointer, struct wlr_input_device *dev = data; assert(dev && dev->pointer); struct wlr_wl_pointer *wlr_wl_pointer = (struct wlr_wl_pointer *)dev->pointer; - wlr_wl_pointer->current_output = NULL; + if (wlr_wl_pointer->current_output) { + wlr_wl_pointer->current_output->enter_serial = 0; + wlr_wl_pointer->current_output = NULL; + } } static void pointer_handle_motion(void *data, struct wl_pointer *wl_pointer, @@ -227,6 +232,7 @@ static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat, wlr_pointer_init(wlr_device->pointer, NULL); wlr_wl_device->resource = wl_pointer; wl_signal_emit(&backend->backend.events.input_add, wlr_device); + backend->pointer = wl_pointer; } if ((caps & WL_SEAT_CAPABILITY_KEYBOARD)) { wlr_log(L_DEBUG, "seat %p offered keyboard", (void*) wl_seat); diff --git a/include/backend/wayland.h b/include/backend/wayland.h index d930f21b..92ae63ba 100644 --- a/include/backend/wayland.h +++ b/include/backend/wayland.h @@ -27,6 +27,7 @@ struct wlr_wl_backend { struct wl_shell *shell; struct wl_shm *shm; struct wl_seat *seat; + struct wl_pointer *pointer; char *seat_name; }; @@ -38,6 +39,14 @@ struct wlr_wl_backend_output { struct wl_shell_surface *shell_surface; struct wl_egl_window *egl_window; struct wl_callback *frame_callback; + + struct wl_shm_pool *cursor_pool; + void *cursor_buffer; // actually a (client-side) struct wl_buffer* + uint8_t *cursor_data; + struct wl_surface *cursor_surface; + uint32_t cursor_buf_size; + uint32_t enter_serial; + void *egl_surface; }; @@ -55,6 +64,7 @@ struct wlr_wl_pointer { }; void wlr_wl_registry_poll(struct wlr_wl_backend *backend); +void wlr_wl_output_update_cursor(struct wlr_wl_backend_output *output, uint32_t serial); struct wlr_wl_backend_output *wlr_wl_output_for_surface( struct wlr_wl_backend *backend, struct wl_surface *surface);