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xwayland: add support for global scale factor

Browse source 
This does the necessary changes to support HiDPI in xwayland
applications, with the following xwayland patch:
https://gitlab.freedesktop.org/xorg/xserver/merge_requests/111
This commit is contained in:
Dario Nieuwenhuis 2020-01-31 22:57:48 +01:00
parent 61d6408fdb
commit 9bd9089045
3 changed files with 41 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

4
include/wlr/xwayland.h
View file

@ -30,6 +30,8 @@ struct wlr_xwayland {
time_t server_start;
int32_t scale;
/* Anything above display is reset on Xwayland restart, rest is conserved */
int display;
@ -205,6 +207,8 @@ struct wlr_xwayland *wlr_xwayland_create(struct wl_display *wl_display,
void wlr_xwayland_destroy(struct wlr_xwayland *wlr_xwayland);
void wlr_xwayland_set_scale(struct wlr_xwayland *wlr_xwayland, int32_t scale);
void wlr_xwayland_set_cursor(struct wlr_xwayland *wlr_xwayland,
uint8_t *pixels, uint32_t stride, uint32_t width, uint32_t height,
int32_t hotspot_x, int32_t hotspot_y);

6
xwayland/xwayland.c
View file

@ -409,6 +409,8 @@ struct wlr_xwayland *wlr_xwayland_create(struct wl_display *wl_display,
wlr_xwayland->wl_fd[0] = wlr_xwayland->wl_fd[1] = -1;
wlr_xwayland->wm_fd[0] = wlr_xwayland->wm_fd[1] = -1;
wlr_xwayland->scale = 1;
wl_signal_init(&wlr_xwayland->events.new_surface);
wl_signal_init(&wlr_xwayland->events.ready);
@ -436,6 +438,10 @@ error_alloc:
return NULL;
}
void wlr_xwayland_set_scale(struct wlr_xwayland *wlr_xwayland, int32_t scale) {
wlr_xwayland->scale = scale;
}
void wlr_xwayland_set_cursor(struct wlr_xwayland *wlr_xwayland,
uint8_t *pixels, uint32_t stride, uint32_t width, uint32_t height,
int32_t hotspot_x, int32_t hotspot_y) {

42
xwayland/xwm.c
View file

@ -16,6 +16,15 @@
#include "util/signal.h"
#include "xwayland/xwm.h"
static int32_t scale(struct wlr_xwm *xwm, int32_t val) {
return val * xwm->xwayland->scale;
}
static int32_t unscale(struct wlr_xwm *xwm, int32_t val) {
return (val + xwm->xwayland->scale/2) / xwm->xwayland->scale;
}
const char *atom_map[ATOM_LAST] = {
[WL_SURFACE_ID] = "WL_SURFACE_ID",
[WM_DELETE_WINDOW] = "WM_DELETE_WINDOW",
@ -834,8 +843,13 @@ static void xwm_handle_create_notify(struct wlr_xwm *xwm,
return;
}
xwayland_surface_create(xwm, ev->window, ev->x, ev->y,
ev->width, ev->height, ev->override_redirect);
xwayland_surface_create(xwm, ev->window,
unscale(xwm, ev->x),
unscale(xwm, ev->y),
unscale(xwm, ev->width),
unscale(xwm, ev->height),
ev->override_redirect
);
}
static void xwm_handle_destroy_notify(struct wlr_xwm *xwm,
@ -866,10 +880,10 @@ static void xwm_handle_configure_request(struct wlr_xwm *xwm,
struct wlr_xwayland_surface_configure_event wlr_event = {
.surface = surface,
.x = mask & XCB_CONFIG_WINDOW_X ? ev->x : surface->x,
.y = mask & XCB_CONFIG_WINDOW_Y ? ev->y : surface->y,
.width = mask & XCB_CONFIG_WINDOW_WIDTH ? ev->width : surface->width,
.height = mask & XCB_CONFIG_WINDOW_HEIGHT ? ev->height : surface->height,
.x = unscale(xwm, mask & XCB_CONFIG_WINDOW_X ? ev->x : surface->x),
.y = unscale(xwm, mask & XCB_CONFIG_WINDOW_Y ? ev->y : surface->y),
.width = unscale(xwm, mask & XCB_CONFIG_WINDOW_WIDTH ? ev->width : surface->width),
.height = unscale(xwm, mask & XCB_CONFIG_WINDOW_HEIGHT ? ev->height : surface->height),
.mask = mask,
};
wlr_log(WLR_DEBUG, "XCB_CONFIGURE_REQUEST (%u) [%ux%u+%d,%d]", ev->window,
@ -885,10 +899,10 @@ static void xwm_handle_configure_notify(struct wlr_xwm *xwm,
return;
}
xsurface->x = ev->x;
xsurface->y = ev->y;
xsurface->width = ev->width;
xsurface->height = ev->height;
xsurface->x = unscale(xwm, ev->x);
xsurface->y = unscale(xwm, ev->y);
xsurface->width = unscale(xwm, ev->width);
xsurface->height = unscale(xwm, ev->height);
if (xsurface->override_redirect != ev->override_redirect) {
xsurface->override_redirect = ev->override_redirect;
@ -1431,7 +1445,13 @@ void wlr_xwayland_surface_configure(struct wlr_xwayland_surface *xsurface,
uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
XCB_CONFIG_WINDOW_BORDER_WIDTH;
uint32_t values[] = {x, y, width, height, 0};
uint32_t values[] = {
scale(xsurface->xwm, x),
scale(xsurface->xwm, y),
scale(xsurface->xwm, width),
scale(xsurface->xwm, height),
0,
};
xcb_configure_window(xwm->xcb_conn, xsurface->window_id, mask, values);
xcb_flush(xwm->xcb_conn);
}