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alpha-modifier-v1: new protocol implementation

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References: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/287
This commit is contained in:
Simon Ser 2024-03-18 17:30:42 +01:00
parent 8abd43803b
commit 563f100627
4 changed files with 221 additions and 1 deletions
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1
types/meson.build
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@ -33,6 +33,7 @@ wlr_files += files(
'buffer/dmabuf.c',
'buffer/readonly_data.c',
'buffer/resource.c',
'wlr_alpha_modifier_v1.c',
'wlr_compositor.c',
'wlr_content_type_v1.c',
'wlr_cursor_shape_v1.c',

185
types/wlr_alpha_modifier_v1.c Normal file
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@ -0,0 +1,185 @@
#include <assert.h>
#include <stdlib.h>
#include <wlr/types/wlr_alpha_modifier_v1.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/util/addon.h>
#include "alpha-modifier-v1-protocol.h"
#define ALPHA_MODIFIER_VERSION 1
struct wlr_alpha_modifier_surface_v1 {
struct wl_resource *resource;
struct wlr_surface *surface;
struct wlr_addon addon;
struct wlr_surface_synced synced;
struct wlr_alpha_modifier_surface_v1_state pending, current;
};
static const struct wp_alpha_modifier_surface_v1_interface surface_impl;
// Returns NULL if the wl_surface was destroyed
static struct wlr_alpha_modifier_surface_v1 *surface_from_resource(struct wl_resource *resource) {
assert(wl_resource_instance_of(resource, &wp_alpha_modifier_surface_v1_interface,
&surface_impl));
return wl_resource_get_user_data(resource);
}
static void surface_destroy(struct wlr_alpha_modifier_surface_v1 *surface) {
if (surface == NULL) {
return;
}
wlr_surface_synced_finish(&surface->synced);
wlr_addon_finish(&surface->addon);
wl_resource_set_user_data(surface->resource, NULL);
free(surface);
}
static void surface_handle_resource_destroy(struct wl_resource *resource) {
struct wlr_alpha_modifier_surface_v1 *surface = surface_from_resource(resource);
surface_destroy(surface);
}
static void surface_handle_destroy(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static void surface_handle_set_multiplier(struct wl_client *client,
struct wl_resource *resource, uint32_t multiplier) {
struct wlr_alpha_modifier_surface_v1 *surface = surface_from_resource(resource);
if (surface == NULL) {
wl_resource_post_error(resource,
WP_ALPHA_MODIFIER_SURFACE_V1_ERROR_NO_SURFACE,
"The wl_surface object has been destroyed");
return;
}
surface->pending.multiplier = (double)multiplier / UINT32_MAX;
}
static const struct wp_alpha_modifier_surface_v1_interface surface_impl = {
.destroy = surface_handle_destroy,
.set_multiplier = surface_handle_set_multiplier,
};
static void surface_synced_init_state(void *_state) {
struct wlr_alpha_modifier_surface_v1_state *state = _state;
state->multiplier = 1;
}
static const struct wlr_surface_synced_impl surface_synced_impl = {
.state_size = sizeof(struct wlr_alpha_modifier_surface_v1_state),
.init_state = surface_synced_init_state,
};
static void surface_addon_destroy(struct wlr_addon *addon) {
struct wlr_alpha_modifier_surface_v1 *surface = wl_container_of(addon, surface, addon);
surface_destroy(surface);
}
static const struct wlr_addon_interface surface_addon_impl = {
.name = "wp_alpha_modifier_surface_v1",
.destroy = surface_addon_destroy,
};
static struct wlr_alpha_modifier_surface_v1 *surface_from_wlr_surface(
struct wlr_surface *wlr_surface) {
struct wlr_addon *addon = wlr_addon_find(&wlr_surface->addons, NULL, &surface_addon_impl);
if (addon == NULL) {
return NULL;
}
struct wlr_alpha_modifier_surface_v1 *surface = wl_container_of(addon, surface, addon);
return surface;
}
static void manager_handle_destroy(struct wl_client *client, struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static void manager_handle_get_surface(struct wl_client *client,
struct wl_resource *manager_resource, uint32_t id,
struct wl_resource *surface_resource) {
struct wlr_surface *wlr_surface = wlr_surface_from_resource(surface_resource);
if (surface_from_wlr_surface(wlr_surface) != NULL) {
wl_resource_post_error(manager_resource,
WP_ALPHA_MODIFIER_V1_ERROR_ALREADY_CONSTRUCTED,
"The wl_surface object already has a wp_alpha_modifier_surface_v1 object");
return;
}
struct wlr_alpha_modifier_surface_v1 *surface = calloc(1, sizeof(*surface));
if (surface == NULL) {
wl_resource_post_no_memory(manager_resource);
return;
}
if (!wlr_surface_synced_init(&surface->synced, wlr_surface,
&surface_synced_impl, &surface->pending, &surface->current)) {
free(surface);
wl_resource_post_no_memory(manager_resource);
return;
}
uint32_t version = wl_resource_get_version(manager_resource);
surface->resource = wl_resource_create(client,
&wp_alpha_modifier_surface_v1_interface, version, id);
if (surface->resource == NULL) {
wlr_surface_synced_finish(&surface->synced);
free(surface);
wl_resource_post_no_memory(manager_resource);
return;
}
wl_resource_set_implementation(surface->resource, &surface_impl,
surface, surface_handle_resource_destroy);
surface->surface = wlr_surface;
wlr_addon_init(&surface->addon, &wlr_surface->addons, NULL, &surface_addon_impl);
}
static const struct wp_alpha_modifier_v1_interface manager_impl = {
.destroy = manager_handle_destroy,
.get_surface = manager_handle_get_surface,
};
static void manager_bind(struct wl_client *client, void *data,
uint32_t version, uint32_t id) {
struct wl_resource *resource = wl_resource_create(client,
&wp_alpha_modifier_v1_interface, version, id);
if (resource == NULL) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(resource, &manager_impl, NULL, NULL);
}
static void handle_display_destroy(struct wl_listener *listener, void *data) {
struct wlr_alpha_modifier_v1 *manager = wl_container_of(listener, manager, display_destroy);
wl_list_remove(&manager->display_destroy.link);
wl_global_destroy(manager->global);
free(manager);
}
struct wlr_alpha_modifier_v1 *wlr_alpha_modifier_v1_create(struct wl_display *display) {
struct wlr_alpha_modifier_v1 *manager = calloc(1, sizeof(*manager));
if (manager == NULL) {
return NULL;
}
manager->global = wl_global_create(display, &wp_alpha_modifier_v1_interface,
ALPHA_MODIFIER_VERSION, NULL, manager_bind);
if (manager->global == NULL) {
free(manager);
return NULL;
}
manager->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(display, &manager->display_destroy);
return manager;
}
const struct wlr_alpha_modifier_surface_v1_state *wlr_alpha_modifier_v1_get_surface_state(
struct wlr_surface *wlr_surface) {
struct wlr_alpha_modifier_surface_v1 *surface = surface_from_wlr_surface(wlr_surface);
return &surface->current;
}