wlroots/backend/wayland/output.c

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#include <stdio.h>
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#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
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#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <wayland-client.h>
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#include <GLES2/gl2.h>
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#include <wlr/interfaces/wlr_output.h>
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#include <wlr/util/log.h>
#include "backend/wayland.h"
#include "xdg-shell-unstable-v6-client-protocol.h"
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int os_create_anonymous_file(off_t size);
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static struct wl_callback_listener frame_listener;
static void surface_frame_callback(void *data, struct wl_callback *cb, uint32_t time) {
struct wlr_output *wlr_output = data;
assert(wlr_output);
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wl_signal_emit(&wlr_output->events.frame, wlr_output);
wl_callback_destroy(cb);
}
static struct wl_callback_listener frame_listener = {
.done = surface_frame_callback
};
static void wlr_wl_output_make_current(struct wlr_output *_output) {
struct wlr_wl_backend_output *output = (struct wlr_wl_backend_output *)_output;
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if (!eglMakeCurrent(output->backend->egl.display,
output->egl_surface, output->egl_surface,
output->backend->egl.context)) {
wlr_log(L_ERROR, "eglMakeCurrent failed: %s", egl_error());
}
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}
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static void wlr_wl_output_swap_buffers(struct wlr_output *_output) {
struct wlr_wl_backend_output *output = (struct wlr_wl_backend_output *)_output;
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output->frame_callback = wl_surface_frame(output->surface);
wl_callback_add_listener(output->frame_callback, &frame_listener, output);
if (!eglSwapBuffers(output->backend->egl.display, output->egl_surface)) {
wlr_log(L_ERROR, "eglSwapBuffers failed: %s", egl_error());
}
}
static void wlr_wl_output_transform(struct wlr_output *_output,
enum wl_output_transform transform) {
struct wlr_wl_backend_output *output = (struct wlr_wl_backend_output *)_output;
output->wlr_output.transform = transform;
}
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static bool wlr_wl_output_set_cursor(struct wlr_output *_output,
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const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height,
int32_t hotspot_x, int32_t hotspot_y, bool update_pixels) {
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struct wlr_wl_backend_output *output = (struct wlr_wl_backend_output *)_output;
struct wlr_wl_backend *backend = output->backend;
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if (!update_pixels) {
// Update hotspot without changing cursor image
wlr_wl_output_update_cursor(output, output->enter_serial, hotspot_x,
hotspot_y);
return true;
}
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if (!buf) {
// Hide cursor
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if (output->cursor_surface) {
wl_surface_destroy(output->cursor_surface);
munmap(output->cursor_data, output->cursor_buf_size);
output->cursor_surface = NULL;
output->cursor_buf_size = 0;
}
wlr_wl_output_update_cursor(output, output->enter_serial, hotspot_x,
hotspot_y);
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return true;
}
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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);
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wlr_wl_output_update_cursor(output, output->enter_serial,
hotspot_x, hotspot_y);
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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);
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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);
}
eglDestroySurface(output->backend->egl.display, output->surface);
wl_egl_window_destroy(output->egl_window);
zxdg_toplevel_v6_destroy(output->xdg_toplevel);
zxdg_surface_v6_destroy(output->xdg_surface);
wl_surface_destroy(output->surface);
free(output);
}
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void wlr_wl_output_update_cursor(struct wlr_wl_backend_output *output,
uint32_t serial, int32_t hotspot_x, int32_t hotspot_y) {
if (output->backend->pointer && serial) {
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wl_pointer_set_cursor(output->backend->pointer, serial,
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output->cursor_surface, hotspot_x, hotspot_y);
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}
}
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,
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.make_current = wlr_wl_output_make_current,
.swap_buffers = wlr_wl_output_swap_buffers,
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.set_cursor = wlr_wl_output_set_cursor,
.move_cursor = wlr_wl_output_move_cursor
};
static void xdg_surface_handle_configure(void *data, struct zxdg_surface_v6 *xdg_surface,
uint32_t serial) {
struct wlr_wl_backend_output *output = data;
assert(output && output->xdg_surface == xdg_surface);
zxdg_surface_v6_ack_configure(xdg_surface, serial);
// nothing else?
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}
static struct zxdg_surface_v6_listener xdg_surface_listener = {
.configure = xdg_surface_handle_configure,
};
static void xdg_toplevel_handle_configure(void *data, struct zxdg_toplevel_v6 *xdg_toplevel,
int32_t width, int32_t height, struct wl_array *states) {
struct wlr_wl_backend_output *output = data;
assert(output && output->xdg_toplevel == xdg_toplevel);
if (width == 0 && height == 0) {
return;
}
// loop over states for maximized etc?
wl_egl_window_resize(output->egl_window, width, height, 0, 0);
output->wlr_output.width = width;
output->wlr_output.height = height;
wlr_output_update_matrix(&output->wlr_output);
wl_signal_emit(&output->wlr_output.events.resolution, output);
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}
static void xdg_toplevel_handle_close(void *data, struct zxdg_toplevel_v6 *xdg_toplevel) {
struct wlr_wl_backend_output *output = data;
assert(output && output->xdg_toplevel == xdg_toplevel);
wl_display_terminate(output->backend->local_display);
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}
static struct zxdg_toplevel_v6_listener xdg_toplevel_listener = {
.configure = xdg_toplevel_handle_configure,
.close = xdg_toplevel_handle_close,
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};
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struct wlr_output *wlr_wl_output_create(struct wlr_backend *_backend) {
assert(wlr_backend_is_wl(_backend));
struct wlr_wl_backend *backend = (struct wlr_wl_backend *)_backend;
if (!backend->started) {
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++backend->requested_outputs;
return NULL;
}
struct wlr_wl_backend_output *output;
if (!(output = calloc(sizeof(struct wlr_wl_backend_output), 1))) {
wlr_log(L_ERROR, "Failed to allocate wlr_wl_backend_output");
return NULL;
}
wlr_output_init(&output->wlr_output, &backend->backend, &output_impl);
struct wlr_output *wlr_output = &output->wlr_output;
wlr_output->width = 640;
wlr_output->height = 480;
strncpy(wlr_output->make, "wayland", sizeof(wlr_output->make));
strncpy(wlr_output->model, "wayland", sizeof(wlr_output->model));
snprintf(wlr_output->name, sizeof(wlr_output->name), "WL-%d",
wl_list_length(&backend->outputs) + 1);
wlr_output_update_matrix(wlr_output);
output->backend = backend;
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output->surface = wl_compositor_create_surface(backend->compositor);
if (!output->surface) {
wlr_log_errno(L_ERROR, "Could not create output surface");
goto error;
}
output->xdg_surface =
zxdg_shell_v6_get_xdg_surface(backend->shell, output->surface);
if (!output->xdg_surface) {
wlr_log_errno(L_ERROR, "Could not get xdg surface");
goto error;
}
output->xdg_toplevel =
zxdg_surface_v6_get_toplevel(output->xdg_surface);
if (!output->xdg_toplevel) {
wlr_log_errno(L_ERROR, "Could not get xdg toplevel");
goto error;
}
zxdg_toplevel_v6_set_app_id(output->xdg_toplevel, "wlroots");
zxdg_toplevel_v6_set_title(output->xdg_toplevel, "wlroots");
zxdg_surface_v6_add_listener(output->xdg_surface,
&xdg_surface_listener, output);
zxdg_toplevel_v6_add_listener(output->xdg_toplevel,
&xdg_toplevel_listener, output);
wl_surface_commit(output->surface);
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output->egl_window = wl_egl_window_create(output->surface,
wlr_output->width, wlr_output->height);
output->egl_surface = wlr_egl_create_surface(&backend->egl, output->egl_window);
wl_display_roundtrip(output->backend->remote_display);
// start rendering loop per callbacks by rendering first frame
if (!eglMakeCurrent(output->backend->egl.display,
output->egl_surface, output->egl_surface,
output->backend->egl.context)) {
wlr_log(L_ERROR, "eglMakeCurrent failed: %s", egl_error());
goto error;
}
glViewport(0, 0, wlr_output->width, wlr_output->height);
glClearColor(1.0, 1.0, 1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
output->frame_callback = wl_surface_frame(output->surface);
wl_callback_add_listener(output->frame_callback, &frame_listener, output);
if (!eglSwapBuffers(output->backend->egl.display, output->egl_surface)) {
wlr_log(L_ERROR, "eglSwapBuffers failed: %s", egl_error());
goto error;
}
wl_list_insert(&backend->outputs, &output->link);
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wlr_output_create_global(wlr_output, backend->local_display);
wl_signal_emit(&backend->backend.events.output_add, wlr_output);
return wlr_output;
error:
wlr_output_destroy(&output->wlr_output);
return NULL;
}