wlroots-hyprland/backend/wayland/output.c

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#include <assert.h>
#include <stdint.h>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <sys/mman.h>
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#include <sys/types.h>
#include <unistd.h>
#include <wayland-client.h>
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#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_matrix.h>
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#include <wlr/util/log.h>
#include "backend/wayland.h"
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#include "util/signal.h"
#include "xdg-shell-unstable-v6-client-protocol.h"
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static struct wlr_wl_output *get_wl_output_from_output(
struct wlr_output *wlr_output) {
assert(wlr_output_is_wl(wlr_output));
return (struct wlr_wl_output *)wlr_output;
}
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static struct wl_callback_listener frame_listener;
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static void surface_frame_callback(void *data, struct wl_callback *cb,
uint32_t time) {
struct wlr_wl_output *output = data;
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assert(output);
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wl_callback_destroy(cb);
output->frame_callback = NULL;
wlr_output_send_frame(&output->wlr_output);
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}
static struct wl_callback_listener frame_listener = {
.done = surface_frame_callback
};
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static bool output_set_custom_mode(struct wlr_output *wlr_output,
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int32_t width, int32_t height, int32_t refresh) {
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struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
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wl_egl_window_resize(output->egl_window, width, height, 0, 0);
wlr_output_update_custom_mode(&output->wlr_output, width, height, 0);
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return true;
}
static bool output_make_current(struct wlr_output *wlr_output,
int *buffer_age) {
struct wlr_wl_output *output =
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get_wl_output_from_output(wlr_output);
return wlr_egl_make_current(&output->backend->egl, output->egl_surface,
buffer_age);
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}
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static bool output_swap_buffers(struct wlr_output *wlr_output,
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pixman_region32_t *damage) {
struct wlr_wl_output *output =
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get_wl_output_from_output(wlr_output);
if (output->frame_callback != NULL) {
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wlr_log(WLR_ERROR, "Skipping buffer swap");
return false;
}
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output->frame_callback = wl_surface_frame(output->surface);
wl_callback_add_listener(output->frame_callback, &frame_listener, output);
if (!wlr_egl_swap_buffers(&output->backend->egl,
output->egl_surface, damage)) {
return false;
}
// TODO: if available, use the presentation-time protocol
wlr_output_send_present(wlr_output, NULL, 0, 0);
return true;
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}
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static void output_transform(struct wlr_output *wlr_output,
enum wl_output_transform transform) {
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struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
output->wlr_output.transform = transform;
}
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static bool output_set_cursor(struct wlr_output *wlr_output,
struct wlr_texture *texture, int32_t scale,
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enum wl_output_transform transform,
int32_t hotspot_x, int32_t hotspot_y, bool update_texture) {
struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
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struct wlr_wl_backend *backend = output->backend;
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struct wlr_box hotspot = { .x = hotspot_x, .y = hotspot_y };
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wlr_box_transform(&hotspot,
wlr_output_transform_invert(wlr_output->transform),
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output->cursor.width, output->cursor.height, &hotspot);
// TODO: use output->wlr_output.transform to transform pixels and hotpot
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output->cursor.hotspot_x = hotspot.x;
output->cursor.hotspot_y = hotspot.y;
if (!update_texture) {
// Update hotspot without changing cursor image
update_wl_output_cursor(output);
return true;
}
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if (output->cursor.surface == NULL) {
output->cursor.surface =
wl_compositor_create_surface(backend->compositor);
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}
struct wl_surface *surface = output->cursor.surface;
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if (texture != NULL) {
int width, height;
wlr_texture_get_size(texture, &width, &height);
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width = width * wlr_output->scale / scale;
height = height * wlr_output->scale / scale;
output->cursor.width = width;
output->cursor.height = height;
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if (output->cursor.egl_window == NULL) {
output->cursor.egl_window =
wl_egl_window_create(surface, width, height);
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}
wl_egl_window_resize(output->cursor.egl_window, width, height, 0, 0);
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EGLSurface egl_surface =
wlr_egl_create_surface(&backend->egl, output->cursor.egl_window);
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wlr_egl_make_current(&backend->egl, egl_surface, NULL);
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struct wlr_box cursor_box = {
.width = width,
.height = height,
};
float projection[9];
wlr_matrix_projection(projection, width, height, wlr_output->transform);
float matrix[9];
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wlr_matrix_project_box(matrix, &cursor_box, transform, 0, projection);
wlr_renderer_begin(backend->renderer, width, height);
wlr_renderer_clear(backend->renderer, (float[]){ 0.0, 0.0, 0.0, 0.0 });
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wlr_render_texture_with_matrix(backend->renderer, texture, matrix, 1.0);
wlr_renderer_end(backend->renderer);
wlr_egl_swap_buffers(&backend->egl, egl_surface, NULL);
wlr_egl_destroy_surface(&backend->egl, egl_surface);
} else {
wl_surface_attach(surface, NULL, 0, 0);
wl_surface_commit(surface);
}
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update_wl_output_cursor(output);
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return true;
}
static void output_destroy(struct wlr_output *wlr_output) {
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struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
if (output == NULL) {
return;
}
wl_list_remove(&output->link);
if (output->cursor.egl_window != NULL) {
wl_egl_window_destroy(output->cursor.egl_window);
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}
if (output->cursor.surface) {
wl_surface_destroy(output->cursor.surface);
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}
if (output->frame_callback) {
wl_callback_destroy(output->frame_callback);
}
wlr_egl_destroy_surface(&output->backend->egl, output->egl_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);
}
void update_wl_output_cursor(struct wlr_wl_output *output) {
if (output->backend->pointer && output->enter_serial) {
wl_pointer_set_cursor(output->backend->pointer, output->enter_serial,
output->cursor.surface, output->cursor.hotspot_x,
output->cursor.hotspot_y);
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}
}
bool output_move_cursor(struct wlr_output *_output, int x, int y) {
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// TODO: only return true if x == current x and y == current y
return true;
}
static const struct wlr_output_impl output_impl = {
.set_custom_mode = output_set_custom_mode,
.transform = output_transform,
.destroy = output_destroy,
.make_current = output_make_current,
.swap_buffers = output_swap_buffers,
.set_cursor = output_set_cursor,
.move_cursor = output_move_cursor,
};
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bool wlr_output_is_wl(struct wlr_output *wlr_output) {
return wlr_output->impl == &output_impl;
}
static void xdg_surface_handle_configure(void *data, struct zxdg_surface_v6 *xdg_surface,
uint32_t serial) {
struct wlr_wl_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,
};
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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_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);
wlr_output_update_custom_mode(&output->wlr_output, width, height, 0);
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}
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static void xdg_toplevel_handle_close(void *data,
struct zxdg_toplevel_v6 *xdg_toplevel) {
struct wlr_wl_output *output = data;
assert(output && output->xdg_toplevel == xdg_toplevel);
wlr_output_destroy((struct wlr_output *)output);
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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 *wlr_backend) {
struct wlr_wl_backend *backend = get_wl_backend_from_backend(wlr_backend);
if (!backend->started) {
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++backend->requested_outputs;
return NULL;
}
struct wlr_wl_output *output;
if (!(output = calloc(sizeof(struct wlr_wl_output), 1))) {
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wlr_log(WLR_ERROR, "Failed to allocate wlr_wl_output");
return NULL;
}
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wlr_output_init(&output->wlr_output, &backend->backend, &output_impl,
backend->local_display);
struct wlr_output *wlr_output = &output->wlr_output;
wlr_output_update_custom_mode(wlr_output, 1280, 720, 0);
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",
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wl_list_length(&backend->outputs) + 1);
output->backend = backend;
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output->surface = wl_compositor_create_surface(backend->compositor);
if (!output->surface) {
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wlr_log_errno(WLR_ERROR, "Could not create output surface");
goto error;
}
wl_surface_set_user_data(output->surface, output);
output->xdg_surface =
zxdg_shell_v6_get_xdg_surface(backend->shell, output->surface);
if (!output->xdg_surface) {
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wlr_log_errno(WLR_ERROR, "Could not get xdg surface");
goto error;
}
output->xdg_toplevel =
zxdg_surface_v6_get_toplevel(output->xdg_surface);
if (!output->xdg_toplevel) {
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wlr_log_errno(WLR_ERROR, "Could not get xdg toplevel");
goto error;
}
char title[32];
if (snprintf(title, sizeof(title), "wlroots - %s", wlr_output->name)) {
zxdg_toplevel_v6_set_title(output->xdg_toplevel, title);
}
zxdg_toplevel_v6_set_app_id(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 (!wlr_egl_make_current(&output->backend->egl, output->egl_surface,
NULL)) {
goto error;
}
wlr_renderer_begin(backend->renderer, wlr_output->width, wlr_output->height);
wlr_renderer_clear(backend->renderer, (float[]){ 1.0, 1.0, 1.0, 1.0 });
wlr_renderer_end(backend->renderer);
output->frame_callback = wl_surface_frame(output->surface);
wl_callback_add_listener(output->frame_callback, &frame_listener, output);
if (!wlr_egl_swap_buffers(&output->backend->egl, output->egl_surface,
NULL)) {
goto error;
}
wl_list_insert(&backend->outputs, &output->link);
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wlr_output_update_enabled(wlr_output, true);
wlr_signal_emit_safe(&backend->backend.events.new_output, wlr_output);
if (backend->pointer != NULL) {
create_wl_pointer(backend->pointer, output);
}
return wlr_output;
error:
wlr_output_destroy(&output->wlr_output);
return NULL;
}