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Wayland: throttle window redraws during interactive resizes (#776)

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ManoloFLTK
2023-09-29 12:29:52 +02:00
parent 491db97a3b
commit ff0a3a9d59
1 changed files with 75 additions and 0 deletions
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src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
+75
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@@ -737,6 +737,67 @@ static struct Fl_Wayland_Screen_Driver::output *screen_num_to_output(int num_scr
}
#define LIBDECOR_MR131 1 // this means libdecor does not include MR!131 yet
#ifdef LIBDECOR_MR131
/* === Beginning of hack that would become un-needed if libdecor accepted MR!131 === */
// true while the GUI is interactively resizing a decorated window
static bool in_decorated_window_resizing = false;
// libdecor's configure cb function for xdg_toplevel objects
static void (*decor_xdg_toplevel_configure)(void*, struct xdg_toplevel *, int32_t,
int32_t, struct wl_array *);
static void fltk_xdg_toplevel_configure(void *user_data,
struct xdg_toplevel *xdg_toplevel,
int32_t width,
int32_t height,
struct wl_array *states) {
uint32_t *p;
in_decorated_window_resizing = false;
// Replace wl_array_for_each(p, states) rejected by C++
for (p = (uint32_t *)(states)->data;
(const char *) p < ((const char *) (states)->data + (states)->size);
(p)++) {
if (*p == XDG_TOPLEVEL_STATE_RESIZING) {
in_decorated_window_resizing = true;
break;
}
}
decor_xdg_toplevel_configure(user_data, xdg_toplevel, width, height, states);
}
struct wl_object { // copied from wayland-private.h
const struct wl_interface *interface;
const void *implementation;
uint32_t id;
};
// replace libdecor's toplevel configure cb by FLTK's
static void use_FLTK_toplevel_configure_cb(struct libdecor_frame *frame) {
struct wl_object *object = (struct wl_object *)libdecor_frame_get_xdg_toplevel(frame);
static struct xdg_toplevel_listener *fltk_listener = NULL;
if (!fltk_listener) {
struct xdg_toplevel_listener *decor_listener = (struct xdg_toplevel_listener*)
object->implementation;
fltk_listener = (struct xdg_toplevel_listener*)
malloc(sizeof(struct xdg_toplevel_listener));
// initialize FLTK's listener with libdecor's values
*fltk_listener = *decor_listener;
// memorize libdecor's toplevel configure cb
decor_xdg_toplevel_configure = decor_listener->configure;
// replace libdecor's toplevel configure cb by FLTK's
fltk_listener->configure = fltk_xdg_toplevel_configure;
}
// replace the toplevel listener by a copy whose configure member is FLTK's
object->implementation = fltk_listener;
}
/* === End of hack that would become un-needed if libdecor accepted MR!131 === */
#endif // LIBDECOR_MR131
static void handle_configure(struct libdecor_frame *frame,
struct libdecor_configuration *configuration, void *user_data)
{
@@ -754,6 +815,10 @@ static void handle_configure(struct libdecor_frame *frame,
if (!window->xdg_surface) window->xdg_surface = libdecor_frame_get_xdg_surface(frame);
#ifdef LIBDECOR_MR131
if (is_1st_run) use_FLTK_toplevel_configure_cb(frame);
#endif
struct wl_output *wl_output = NULL;
if (window->fl_win->fullscreen_active()) {
if (!(window->state & LIBDECOR_WINDOW_STATE_FULLSCREEN)) {
@@ -805,6 +870,16 @@ static void handle_configure(struct libdecor_frame *frame,
//fprintf(stderr,"handle_configure: using floating %dx%d\n",width,height);
}
#ifndef LIBDECOR_MR131
bool in_decorated_window_resizing = (window->state & LIBDECOR_WINDOW_STATE_RESIZING);
#endif
//printf("resize request received from compositor to %dx%d\n",width,height);
if (in_decorated_window_resizing && window->buffer->cb) {
// Skip resizing & redrawing. The last resize request won't be skipped because
// in_decorated_window_resizing will be false then.
return;
}
driver->in_handle_configure = true;
window->fl_win->resize(0, 0, ceil(width / f), ceil(height / f));
driver->in_handle_configure = false;