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cmake_helpers/linux_wayland_helper/linux_wayland_helper.cpp

701 lines
18 KiB
C++

// This file is part of Desktop App Toolkit,
// a set of libraries for developing nice desktop applications.
//
// For license and copyright information please follow this link:
// https://github.com/desktop-app/legal/blob/master/LEGAL
//
#include <dlfcn.h>
#include <errno.h>
#include <gsl/gsl>
#include <wayland-egl.h>
#include <wayland-cursor.h>
#include <iostream>
#define LOAD_SYMBOL(handle, func) LoadSymbol(handle, #func, func)
#define LOAD_SYMBOL_SILENT(handle, func) LoadSymbol(handle, #func, func, true)
namespace Wayland {
namespace {
constexpr auto WL_CLOSURE_MAX_ARGS = 20;
struct wl_egl_window *(*wl_egl_window_create)(
struct wl_surface *surface,
int width,
int height);
void (*wl_egl_window_destroy)(struct wl_egl_window *egl_window);
void (*wl_egl_window_resize)(
struct wl_egl_window *egl_window,
int width,
int height,
int dx,
int dy);
void (*wl_egl_window_get_attached_size)(
struct wl_egl_window *egl_window,
int *width,
int *height);
struct wl_buffer *(*wl_cursor_image_get_buffer)(
struct wl_cursor_image *image);
struct wl_cursor_theme *(*wl_cursor_theme_load)(
const char *name,
int size,
struct wl_shm *shm);
void (*wl_cursor_theme_destroy)(struct wl_cursor_theme *theme);
struct wl_cursor *(*wl_cursor_theme_get_cursor)(
struct wl_cursor_theme *theme,
const char *name);
int (*wl_cursor_frame_and_duration)(
struct wl_cursor *cursor,
uint32_t time,
uint32_t *duration);
void (*wl_proxy_destroy)(struct wl_proxy *proxy);
uint32_t (*wl_proxy_get_version)(struct wl_proxy *proxy);
void (*wl_array_init)(struct wl_array *array);
void (*wl_array_release)(struct wl_array *array);
void *(*wl_array_add)(struct wl_array *array, size_t size);
int (*wl_proxy_add_listener)(
struct wl_proxy *proxy,
void (**implementation)(void),
void *data);
void (*wl_proxy_set_user_data)(struct wl_proxy *proxy, void *user_data);
void *(*wl_proxy_get_user_data)(struct wl_proxy *proxy);
int (*wl_display_get_fd)(struct wl_display *display);
int (*wl_display_get_error)(struct wl_display *display);
int (*wl_display_dispatch)(struct wl_display *display);
struct wl_event_queue *(*wl_display_create_queue)(struct wl_display *display);
int (*wl_display_dispatch_queue_pending)(
struct wl_display *display,
struct wl_event_queue *queue);
int (*wl_display_prepare_read_queue)(
struct wl_display *display,
struct wl_event_queue *queue);
int (*wl_display_flush)(struct wl_display *display);
void (*wl_display_cancel_read)(struct wl_display *display);
int (*wl_display_read_events)(struct wl_display *display);
void (*wl_event_queue_destroy)(struct wl_event_queue *queue);
int (*wl_display_prepare_read)(struct wl_display *display);
int (*wl_display_dispatch_pending)(struct wl_display *display);
struct wl_display *(*wl_display_connect)(const char *name);
struct wl_display *(*wl_display_connect_to_fd)(int fd);
void (*wl_display_disconnect)(struct wl_display *display);
void *(*wl_proxy_create_wrapper)(void *proxy);
void (*wl_proxy_wrapper_destroy)(void *proxy_wrapper);
void (*wl_proxy_set_queue)(struct wl_proxy *proxy, struct wl_event_queue *queue);
int (*wl_display_roundtrip)(struct wl_display *display);
struct wl_proxy *(*wl_proxy_marshal_array_constructor)(
struct wl_proxy *proxy,
uint32_t opcode,
union wl_argument *args,
const struct wl_interface *interface);
struct wl_proxy *(*wl_proxy_marshal_array_constructor_versioned)(
struct wl_proxy *proxy,
uint32_t opcode,
union wl_argument *args,
const struct wl_interface *interface,
uint32_t version);
struct wl_proxy *(*wl_proxy_marshal_array_flags)(
struct wl_proxy *proxy,
uint32_t opcode,
const struct wl_interface *interface,
uint32_t version,
uint32_t flags,
union wl_argument *args);
uint32_t (*wl_proxy_get_id)(struct wl_proxy *proxy);
const void *(*wl_proxy_get_listener)(struct wl_proxy *proxy);
struct argument_details {
char type;
int nullable;
};
const char *get_next_argument(
const char *signature,
struct argument_details *details) {
details->nullable = 0;
for(; *signature; ++signature) {
switch(*signature) {
case 'i':
case 'u':
case 'f':
case 's':
case 'o':
case 'n':
case 'a':
case 'h':
details->type = *signature;
return signature + 1;
case '?':
details->nullable = 1;
}
}
details->type = '\0';
return signature;
}
void wl_argument_from_va_list(
const char *signature,
union wl_argument *args,
int count,
va_list ap) {
int i;
const char *sig_iter;
struct argument_details arg;
sig_iter = signature;
for (i = 0; i < count; i++) {
sig_iter = get_next_argument(sig_iter, &arg);
switch(arg.type) {
case 'i':
args[i].i = va_arg(ap, int32_t);
break;
case 'u':
args[i].u = va_arg(ap, uint32_t);
break;
case 'f':
args[i].f = va_arg(ap, wl_fixed_t);
break;
case 's':
args[i].s = va_arg(ap, const char *);
break;
case 'o':
args[i].o = va_arg(ap, struct wl_object *);
break;
case 'n':
args[i].o = va_arg(ap, struct wl_object *);
break;
case 'a':
args[i].a = va_arg(ap, struct wl_array *);
break;
case 'h':
args[i].h = va_arg(ap, int32_t);
break;
case '\0':
return;
}
}
}
struct HandleDeleter {
void operator()(void *handle) {
dlclose(handle);
}
};
using Handle = std::unique_ptr<void, HandleDeleter>;
bool LoadLibrary(Handle &handle, const char *name) {
handle = Handle(dlopen(name, RTLD_LAZY | RTLD_NODELETE));
if (handle) {
return true;
}
std::cerr << dlerror() << std::endl;
return false;
}
template <typename Function>
inline bool LoadSymbol(
const Handle &handle,
const char *name,
Function &func,
bool silent = false) {
func = handle
? reinterpret_cast<Function>(dlsym(handle.get(), name))
: nullptr;
if (const auto error = dlerror(); error && !silent) {
std::cerr << error << std::endl;
}
return (func != nullptr);
}
bool Resolve() {
static const auto loaded = [] {
auto egl = Handle();
auto cursor = Handle();
auto client = Handle();
const auto required = LoadLibrary(egl, "libwayland-egl.so.1")
&& LOAD_SYMBOL(egl, wl_egl_window_create)
&& LOAD_SYMBOL(egl, wl_egl_window_destroy)
&& LOAD_SYMBOL(egl, wl_egl_window_resize)
&& LOAD_SYMBOL(egl, wl_egl_window_get_attached_size)
&& LoadLibrary(cursor, "libwayland-cursor.so.0")
&& LOAD_SYMBOL(cursor, wl_cursor_image_get_buffer)
&& LOAD_SYMBOL(cursor, wl_cursor_theme_load)
&& LOAD_SYMBOL(cursor, wl_cursor_theme_destroy)
&& LOAD_SYMBOL(cursor, wl_cursor_theme_get_cursor)
&& LOAD_SYMBOL(cursor, wl_cursor_frame_and_duration)
&& LoadLibrary(client, "libwayland-client.so.0")
&& LOAD_SYMBOL(client, wl_proxy_destroy)
&& LOAD_SYMBOL(client, wl_proxy_get_version)
&& LOAD_SYMBOL(client, wl_array_init)
&& LOAD_SYMBOL(client, wl_array_release)
&& LOAD_SYMBOL(client, wl_array_add)
&& LOAD_SYMBOL(client, wl_proxy_add_listener)
&& LOAD_SYMBOL(client, wl_proxy_set_user_data)
&& LOAD_SYMBOL(client, wl_proxy_get_user_data)
&& LOAD_SYMBOL(client, wl_display_get_fd)
&& LOAD_SYMBOL(client, wl_display_get_error)
&& LOAD_SYMBOL(client, wl_display_dispatch)
&& LOAD_SYMBOL(client, wl_display_create_queue)
&& LOAD_SYMBOL(client, wl_display_dispatch_queue_pending)
&& LOAD_SYMBOL(client, wl_display_prepare_read_queue)
&& LOAD_SYMBOL(client, wl_display_flush)
&& LOAD_SYMBOL(client, wl_display_cancel_read)
&& LOAD_SYMBOL(client, wl_display_read_events)
&& LOAD_SYMBOL(client, wl_event_queue_destroy)
&& LOAD_SYMBOL(client, wl_display_prepare_read)
&& LOAD_SYMBOL(client, wl_display_dispatch_pending)
&& LOAD_SYMBOL(client, wl_display_connect)
&& LOAD_SYMBOL(client, wl_display_connect_to_fd)
&& LOAD_SYMBOL(client, wl_display_disconnect)
&& LOAD_SYMBOL(client, wl_proxy_create_wrapper)
&& LOAD_SYMBOL(client, wl_proxy_wrapper_destroy)
&& LOAD_SYMBOL(client, wl_proxy_set_queue)
&& LOAD_SYMBOL(client, wl_display_roundtrip)
&& LOAD_SYMBOL(client, wl_proxy_marshal_array_constructor)
&& LOAD_SYMBOL(client, wl_proxy_marshal_array_constructor_versioned)
&& LOAD_SYMBOL(client, wl_proxy_get_id)
&& LOAD_SYMBOL(client, wl_proxy_get_listener);
LOAD_SYMBOL_SILENT(client, wl_proxy_marshal_array_flags);
return required;
}();
return loaded;
}
} // namespace
} // namespace Wayland
namespace W = Wayland;
extern "C" {
struct wl_egl_window *wl_egl_window_create(
struct wl_surface *surface,
int width,
int height) {
Expects(W::wl_egl_window_create != nullptr);
return W::wl_egl_window_create(surface, width, height);
}
void wl_egl_window_destroy(struct wl_egl_window *egl_window) {
Expects(W::wl_egl_window_destroy != nullptr);
W::wl_egl_window_destroy(egl_window);
}
void wl_egl_window_resize(
struct wl_egl_window *egl_window,
int width,
int height,
int dx,
int dy) {
Expects(W::wl_egl_window_resize != nullptr);
W::wl_egl_window_resize(egl_window, width, height, dx, dy);
}
void wl_egl_window_get_attached_size(
struct wl_egl_window *egl_window,
int *width,
int *height) {
Expects(W::wl_egl_window_get_attached_size != nullptr);
W::wl_egl_window_get_attached_size(egl_window, width, height);
}
struct wl_buffer *wl_cursor_image_get_buffer(struct wl_cursor_image *image) {
Expects(W::wl_cursor_image_get_buffer != nullptr);
return W::wl_cursor_image_get_buffer(image);
}
struct wl_cursor_theme *wl_cursor_theme_load(
const char *name,
int size,
struct wl_shm *shm) {
Expects(W::wl_cursor_theme_load != nullptr);
return W::wl_cursor_theme_load(name, size, shm);
}
void wl_cursor_theme_destroy(struct wl_cursor_theme *theme) {
Expects(W::wl_cursor_theme_destroy != nullptr);
W::wl_cursor_theme_destroy(theme);
}
struct wl_cursor *wl_cursor_theme_get_cursor(
struct wl_cursor_theme *theme,
const char *name) {
Expects(W::wl_cursor_theme_get_cursor != nullptr);
return W::wl_cursor_theme_get_cursor(theme, name);
}
int wl_cursor_frame_and_duration(
struct wl_cursor *cursor,
uint32_t time,
uint32_t *duration) {
Expects(W::wl_cursor_frame_and_duration != nullptr);
return W::wl_cursor_frame_and_duration(cursor, time, duration);
}
void wl_proxy_destroy(struct wl_proxy *proxy) {
Expects(W::wl_proxy_destroy != nullptr);
W::wl_proxy_destroy(proxy);
}
uint32_t wl_proxy_get_version(struct wl_proxy *proxy) {
Expects(W::wl_proxy_get_version != nullptr);
return W::wl_proxy_get_version(proxy);
}
void wl_array_init(struct wl_array *array) {
Expects(W::wl_array_init != nullptr);
W::wl_array_init(array);
}
void wl_array_release(struct wl_array *array) {
Expects(W::wl_array_release != nullptr);
W::wl_array_release(array);
}
void *wl_array_add(struct wl_array *array, size_t size) {
Expects(W::wl_array_add != nullptr);
return W::wl_array_add(array, size);
}
int wl_proxy_add_listener(
struct wl_proxy *proxy,
void (**implementation)(void),
void *data) {
Expects(W::wl_proxy_add_listener != nullptr);
return W::wl_proxy_add_listener(proxy, implementation, data);
}
void wl_proxy_set_user_data(struct wl_proxy *proxy, void *user_data) {
Expects(W::wl_proxy_set_user_data != nullptr);
W::wl_proxy_set_user_data(proxy, user_data);
}
void *wl_proxy_get_user_data(struct wl_proxy *proxy) {
Expects(W::wl_proxy_get_user_data != nullptr);
return W::wl_proxy_get_user_data(proxy);
}
int wl_display_get_fd(struct wl_display *display) {
Expects(W::wl_display_get_fd != nullptr);
return W::wl_display_get_fd(display);
}
int wl_display_get_error(struct wl_display *display) {
Expects(W::wl_display_get_error != nullptr);
return W::wl_display_get_error(display);
}
int wl_display_dispatch(struct wl_display *display) {
Expects(W::wl_display_dispatch != nullptr);
return W::wl_display_dispatch(display);
}
struct wl_event_queue *wl_display_create_queue(struct wl_display *display) {
Expects(W::wl_display_create_queue != nullptr);
return W::wl_display_create_queue(display);
}
int wl_display_dispatch_queue_pending(
struct wl_display *display,
struct wl_event_queue *queue) {
Expects(W::wl_display_dispatch_queue_pending != nullptr);
return W::wl_display_dispatch_queue_pending(display, queue);
}
int wl_display_prepare_read_queue(
struct wl_display *display,
struct wl_event_queue *queue) {
Expects(W::wl_display_prepare_read_queue != nullptr);
return W::wl_display_prepare_read_queue(display, queue);
}
int wl_display_flush(struct wl_display *display) {
Expects(W::wl_display_flush != nullptr);
return W::wl_display_flush(display);
}
void wl_display_cancel_read(struct wl_display *display) {
Expects(W::wl_display_cancel_read != nullptr);
W::wl_display_cancel_read(display);
}
int wl_display_read_events(struct wl_display *display) {
Expects(W::wl_display_read_events != nullptr);
return W::wl_display_read_events(display);
}
void wl_event_queue_destroy(struct wl_event_queue *queue) {
Expects(W::wl_event_queue_destroy != nullptr);
W::wl_event_queue_destroy(queue);
}
int wl_display_prepare_read(struct wl_display *display) {
Expects(W::wl_display_prepare_read != nullptr);
return W::wl_display_prepare_read(display);
}
int wl_display_dispatch_pending(struct wl_display *display) {
Expects(W::wl_display_dispatch_pending != nullptr);
return W::wl_display_dispatch_pending(display);
}
struct wl_display *wl_display_connect(const char *name) {
if (!W::Resolve()) {
errno = ENOENT;
return nullptr;
}
return W::wl_display_connect(name);
}
struct wl_display *wl_display_connect_to_fd(int fd) {
if (!W::Resolve()) {
errno = ENOENT;
return nullptr;
}
return W::wl_display_connect_to_fd(fd);
}
void wl_display_disconnect(struct wl_display *display) {
Expects(W::wl_display_disconnect != nullptr);
W::wl_display_disconnect(display);
}
void *wl_proxy_create_wrapper(void *proxy) {
Expects(W::wl_proxy_create_wrapper != nullptr);
return W::wl_proxy_create_wrapper(proxy);
}
void wl_proxy_wrapper_destroy(void *proxy_wrapper) {
Expects(W::wl_proxy_wrapper_destroy != nullptr);
W::wl_proxy_wrapper_destroy(proxy_wrapper);
}
void wl_proxy_set_queue(
struct wl_proxy *proxy,
struct wl_event_queue *queue) {
Expects(W::wl_proxy_set_queue != nullptr);
W::wl_proxy_set_queue(proxy, queue);
}
int wl_display_roundtrip(struct wl_display *display) {
Expects(W::wl_display_roundtrip != nullptr);
return W::wl_display_roundtrip(display);
}
struct wl_proxy *wl_proxy_marshal_array_constructor(
struct wl_proxy *proxy,
uint32_t opcode,
union wl_argument *args,
const struct wl_interface *interface) {
Expects(W::wl_proxy_marshal_array_constructor != nullptr);
return W::wl_proxy_marshal_array_constructor(
proxy,
opcode,
args,
interface);
}
struct wl_proxy *wl_proxy_marshal_array_constructor_versioned(
struct wl_proxy *proxy,
uint32_t opcode,
union wl_argument *args,
const struct wl_interface *interface,
uint32_t version) {
Expects(W::wl_proxy_marshal_array_constructor_versioned != nullptr);
return W::wl_proxy_marshal_array_constructor_versioned(
proxy,
opcode,
args,
interface,
version);
}
struct wl_proxy *wl_proxy_marshal_array_flags(
struct wl_proxy *proxy,
uint32_t opcode,
const struct wl_interface *interface,
uint32_t version,
uint32_t flags,
union wl_argument *args) {
Expects(W::wl_proxy_marshal_array_flags != nullptr);
return W::wl_proxy_marshal_array_flags(
proxy,
opcode,
interface,
version,
flags,
args);
}
uint32_t wl_proxy_get_id(struct wl_proxy *proxy) {
Expects(W::wl_proxy_get_id != nullptr);
return W::wl_proxy_get_id(proxy);
}
const void *wl_proxy_get_listener(struct wl_proxy *proxy) {
Expects(W::wl_proxy_get_listener != nullptr);
return W::wl_proxy_get_listener(proxy);
}
void wl_proxy_marshal(struct wl_proxy *proxy, uint32_t opcode, ...) {
union wl_argument args[W::WL_CLOSURE_MAX_ARGS];
va_list ap;
va_start(ap, opcode);
// wl_proxy { wl_object { wl_interface *, ... }, ... }
struct wl_object *object = (struct wl_object*)proxy;
struct wl_interface *interface = *((struct wl_interface**)object);
W::wl_argument_from_va_list(
interface->methods[opcode].signature,
args,
W::WL_CLOSURE_MAX_ARGS,
ap);
va_end(ap);
wl_proxy_marshal_array_constructor(proxy, opcode, args, nullptr);
}
struct wl_proxy *wl_proxy_marshal_constructor(
struct wl_proxy *proxy,
uint32_t opcode,
const struct wl_interface *interface,
...) {
union wl_argument args[W::WL_CLOSURE_MAX_ARGS];
va_list ap;
va_start(ap, interface);
// wl_proxy { wl_object { wl_interface *, ... }, ... }
struct wl_object *object = (struct wl_object*)proxy;
struct wl_interface *i = *((struct wl_interface**)object);
W::wl_argument_from_va_list(
i->methods[opcode].signature,
args,
W::WL_CLOSURE_MAX_ARGS,
ap);
va_end(ap);
return wl_proxy_marshal_array_constructor(proxy, opcode, args, interface);
}
struct wl_proxy *wl_proxy_marshal_constructor_versioned(
struct wl_proxy *proxy,
uint32_t opcode,
const struct wl_interface *interface,
uint32_t version,
...) {
union wl_argument args[W::WL_CLOSURE_MAX_ARGS];
va_list ap;
va_start(ap, version);
// wl_proxy { wl_object { wl_interface *, ... }, ... }
struct wl_object *object = (struct wl_object*)proxy;
struct wl_interface *i = *((struct wl_interface**)object);
W::wl_argument_from_va_list(
i->methods[opcode].signature,
args,
W::WL_CLOSURE_MAX_ARGS,
ap);
va_end(ap);
return wl_proxy_marshal_array_constructor_versioned(proxy, opcode,
args, interface,
version);
}
struct wl_proxy *wl_proxy_marshal_flags(
struct wl_proxy *proxy,
uint32_t opcode,
const struct wl_interface *interface,
uint32_t version,
uint32_t flags,
...) {
union wl_argument args[W::WL_CLOSURE_MAX_ARGS];
va_list ap;
va_start(ap, flags);
// wl_proxy { wl_object { wl_interface *, ... }, ... }
struct wl_object *object = (struct wl_object*)proxy;
struct wl_interface *i = *((struct wl_interface**)object);
W::wl_argument_from_va_list(
i->methods[opcode].signature,
args,
W::WL_CLOSURE_MAX_ARGS,
ap);
va_end(ap);
if (W::wl_proxy_marshal_array_flags == nullptr) {
const auto result = wl_proxy_marshal_array_constructor_versioned(
proxy,
opcode,
args,
interface,
version);
if (flags & WL_MARSHAL_FLAG_DESTROY) {
wl_proxy_destroy(proxy);
}
return result;
}
return wl_proxy_marshal_array_flags(
proxy,
opcode,
interface,
version,
flags,
args);
}
} // extern "C"