193 lines
5.9 KiB
C
193 lines
5.9 KiB
C
#include <assert.h>
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#include <stdlib.h>
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#include <wayland-server-core.h>
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#include <wlr/types/wlr_compositor.h>
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#include <wlr/types/wlr_region.h>
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#include <wlr/types/wlr_surface.h>
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#include <wlr/util/log.h>
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#include "util/signal.h"
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#define COMPOSITOR_VERSION 4
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#define SUBCOMPOSITOR_VERSION 1
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extern const struct wlr_surface_role subsurface_role;
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bool wlr_surface_is_subsurface(struct wlr_surface *surface) {
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return surface->role == &subsurface_role;
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}
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struct wlr_subsurface *wlr_subsurface_from_wlr_surface(
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struct wlr_surface *surface) {
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assert(wlr_surface_is_subsurface(surface));
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return (struct wlr_subsurface *)surface->role_data;
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}
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static void subcompositor_handle_destroy(struct wl_client *client,
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struct wl_resource *resource) {
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wl_resource_destroy(resource);
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}
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static void subcompositor_handle_get_subsurface(struct wl_client *client,
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struct wl_resource *resource, uint32_t id,
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struct wl_resource *surface_resource,
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struct wl_resource *parent_resource) {
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struct wlr_surface *surface = wlr_surface_from_resource(surface_resource);
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struct wlr_surface *parent = wlr_surface_from_resource(parent_resource);
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static const char msg[] = "get_subsurface: wl_subsurface@";
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if (surface == parent) {
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wl_resource_post_error(resource,
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WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
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"%s%d: wl_surface@%d cannot be its own parent",
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msg, id, wl_resource_get_id(surface_resource));
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return;
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}
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if (wlr_surface_is_subsurface(surface) &&
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wlr_subsurface_from_wlr_surface(surface) != NULL) {
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wl_resource_post_error(resource,
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WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
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"%s%d: wl_surface@%d is already a sub-surface",
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msg, id, wl_resource_get_id(surface_resource));
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return;
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}
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if (wlr_surface_get_root_surface(parent) == surface) {
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wl_resource_post_error(resource,
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WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
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"%s%d: wl_surface@%d is an ancestor of parent",
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msg, id, wl_resource_get_id(surface_resource));
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return;
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}
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if (!wlr_surface_set_role(surface, &subsurface_role, NULL,
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resource, WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE)) {
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return;
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}
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wlr_subsurface_create(surface, parent, wl_resource_get_version(resource),
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id, NULL);
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}
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static const struct wl_subcompositor_interface subcompositor_impl = {
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.destroy = subcompositor_handle_destroy,
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.get_subsurface = subcompositor_handle_get_subsurface,
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};
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static void subcompositor_bind(struct wl_client *client, void *data,
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uint32_t version, uint32_t id) {
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struct wlr_subcompositor *subcompositor = data;
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struct wl_resource *resource =
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wl_resource_create(client, &wl_subcompositor_interface, 1, id);
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if (resource == NULL) {
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wl_client_post_no_memory(client);
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return;
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}
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wl_resource_set_implementation(resource, &subcompositor_impl,
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subcompositor, NULL);
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}
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static bool subcompositor_init(struct wlr_subcompositor *subcompositor,
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struct wl_display *display) {
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subcompositor->global = wl_global_create(display,
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&wl_subcompositor_interface, SUBCOMPOSITOR_VERSION, subcompositor,
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subcompositor_bind);
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if (subcompositor->global == NULL) {
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wlr_log_errno(WLR_ERROR, "Could not allocate subcompositor global");
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return false;
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}
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return true;
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}
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static void subcompositor_finish(struct wlr_subcompositor *subcompositor) {
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wl_global_destroy(subcompositor->global);
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}
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static const struct wl_compositor_interface compositor_impl;
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static struct wlr_compositor *compositor_from_resource(
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struct wl_resource *resource) {
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assert(wl_resource_instance_of(resource, &wl_compositor_interface,
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&compositor_impl));
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return wl_resource_get_user_data(resource);
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}
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static void compositor_create_surface(struct wl_client *client,
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struct wl_resource *resource, uint32_t id) {
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struct wlr_compositor *compositor = compositor_from_resource(resource);
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struct wlr_surface *surface = wlr_surface_create(client,
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wl_resource_get_version(resource), id, compositor->renderer, NULL);
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if (surface == NULL) {
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wl_client_post_no_memory(client);
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return;
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}
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wlr_signal_emit_safe(&compositor->events.new_surface, surface);
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}
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static void compositor_create_region(struct wl_client *client,
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struct wl_resource *resource, uint32_t id) {
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wlr_region_create(client, wl_resource_get_version(resource), id, NULL);
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}
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static const struct wl_compositor_interface compositor_impl = {
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.create_surface = compositor_create_surface,
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.create_region = compositor_create_region,
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};
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static void compositor_bind(struct wl_client *wl_client, void *data,
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uint32_t version, uint32_t id) {
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struct wlr_compositor *compositor = data;
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struct wl_resource *resource =
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wl_resource_create(wl_client, &wl_compositor_interface, version, id);
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if (resource == NULL) {
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wl_client_post_no_memory(wl_client);
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return;
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}
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wl_resource_set_implementation(resource, &compositor_impl, compositor, NULL);
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}
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static void handle_display_destroy(struct wl_listener *listener, void *data) {
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struct wlr_compositor *compositor =
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wl_container_of(listener, compositor, display_destroy);
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wlr_signal_emit_safe(&compositor->events.destroy, compositor);
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subcompositor_finish(&compositor->subcompositor);
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wl_list_remove(&compositor->display_destroy.link);
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wl_global_destroy(compositor->global);
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free(compositor);
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}
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struct wlr_compositor *wlr_compositor_create(struct wl_display *display,
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struct wlr_renderer *renderer) {
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struct wlr_compositor *compositor =
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calloc(1, sizeof(struct wlr_compositor));
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if (!compositor) {
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wlr_log_errno(WLR_ERROR, "Could not allocate wlr compositor");
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return NULL;
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}
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compositor->global = wl_global_create(display, &wl_compositor_interface,
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COMPOSITOR_VERSION, compositor, compositor_bind);
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if (!compositor->global) {
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free(compositor);
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wlr_log_errno(WLR_ERROR, "Could not allocate compositor global");
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return NULL;
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}
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compositor->renderer = renderer;
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wl_signal_init(&compositor->events.new_surface);
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wl_signal_init(&compositor->events.destroy);
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subcompositor_init(&compositor->subcompositor, display);
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compositor->display_destroy.notify = handle_display_destroy;
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wl_display_add_destroy_listener(display, &compositor->display_destroy);
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return compositor;
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}
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