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wayland: Add support for high-DPI cursors

This commit is contained in:
Ethan Lee 2021-09-22 13:26:44 -04:00 committed by Sam Lantinga
parent 42ae9116ad
commit 8e54698aa6
4 changed files with 147 additions and 99 deletions
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230
src/video/wayland/SDL_waylandmouse.c
View File

@ -47,11 +47,110 @@ typedef struct {
int hot_x, hot_y;
int w, h;
/* Either a preloaded cursor, or one we created ourselves */
struct wl_cursor *cursor;
/* shm_data is non-NULL for custom cursors.
* When shm_data is NULL, system_cursor must be valid
*/
SDL_SystemCursor system_cursor;
void *shm_data;
} Wayland_CursorData;
static SDL_bool
wayland_get_system_cursor(SDL_VideoData *vdata, Wayland_CursorData *cdata, float *scale)
{
struct wl_cursor_theme *theme = NULL;
struct wl_cursor *cursor;
SDL_Window *focus;
SDL_WindowData *focusdata;
int i;
/* FIXME: We need to be able to query the cursor size from the desktop at
* some point! For a while this was 32, but when testing on real desktops it
* seems like most of them default to 24. We'll need a protocol to get this
* for real, but for now this is a pretty safe bet.
* -flibit
*/
int size = 24;
/* First, find the appropriate theme based on the current scale... */
focus = SDL_GetMouse()->focus;
if (focus == NULL) {
/* Nothing to see here, bail. */
return SDL_FALSE;
}
focusdata = focus->driverdata;
*scale = focusdata->scale_factor;
size *= focusdata->scale_factor;
for (i = 0; i < vdata->num_cursor_themes; i += 1) {
if (vdata->cursor_themes[i].size == size) {
theme = vdata->cursor_themes[i].theme;
break;
}
}
if (theme == NULL) {
vdata->cursor_themes = SDL_realloc(vdata->cursor_themes,
sizeof(SDL_WaylandCursorTheme) * (vdata->num_cursor_themes + 1));
if (vdata->cursor_themes == NULL) {
SDL_OutOfMemory();
return SDL_FALSE;
}
theme = WAYLAND_wl_cursor_theme_load(NULL, size, vdata->shm);
vdata->cursor_themes[vdata->num_cursor_themes++].theme = theme;
}
/* Next, find the cursor from the theme... */
switch(cdata->system_cursor)
{
case SDL_SYSTEM_CURSOR_ARROW:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "left_ptr");
break;
case SDL_SYSTEM_CURSOR_IBEAM:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "xterm");
break;
case SDL_SYSTEM_CURSOR_WAIT:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "watch");
break;
case SDL_SYSTEM_CURSOR_CROSSHAIR:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_WAITARROW:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "watch");
break;
case SDL_SYSTEM_CURSOR_SIZENWSE:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_SIZENESW:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_SIZEWE:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_SIZENS:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_SIZEALL:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_NO:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "xterm");
break;
case SDL_SYSTEM_CURSOR_HAND:
cursor = WAYLAND_wl_cursor_theme_get_cursor(theme, "hand1");
break;
default:
SDL_assert(0);
return SDL_FALSE;
}
/* ... Set the cursor data, finally. */
cdata->buffer = WAYLAND_wl_cursor_image_get_buffer(cursor->images[0]);
cdata->hot_x = cursor->images[0]->hotspot_x;
cdata->hot_y = cursor->images[0]->hotspot_y;
cdata->w = cursor->images[0]->width;
cdata->h = cursor->images[0]->height;
return SDL_TRUE;
}
static int
wayland_create_tmp_file(off_t size)
{
@ -192,30 +291,30 @@ Wayland_CreateCursor(SDL_Surface *surface, int hot_x, int hot_y)
}
static SDL_Cursor *
CreateCursorFromWlCursor(SDL_VideoData *d, struct wl_cursor *wlcursor)
Wayland_CreateSystemCursor(SDL_SystemCursor id)
{
SDL_VideoData *data = SDL_GetVideoDevice()->driverdata;
SDL_Cursor *cursor;
cursor = SDL_calloc(1, sizeof (*cursor));
if (cursor) {
Wayland_CursorData *data = SDL_calloc (1, sizeof (Wayland_CursorData));
if (!data) {
Wayland_CursorData *cdata = SDL_calloc (1, sizeof (Wayland_CursorData));
if (!cdata) {
SDL_OutOfMemory();
SDL_free(cursor);
return NULL;
}
cursor->driverdata = (void *) data;
cursor->driverdata = (void *) cdata;
data->buffer = WAYLAND_wl_cursor_image_get_buffer(wlcursor->images[0]);
data->surface = wl_compositor_create_surface(d->compositor);
wl_surface_set_user_data(data->surface, NULL);
data->hot_x = wlcursor->images[0]->hotspot_x;
data->hot_y = wlcursor->images[0]->hotspot_y;
data->w = wlcursor->images[0]->width;
data->h = wlcursor->images[0]->height;
data->cursor= wlcursor;
cdata->surface = wl_compositor_create_surface(data->compositor);
wl_surface_set_user_data(cdata->surface, NULL);
/* Note that we can't actually set any other cursor properties, as this
* is output-specific. See wayland_get_system_cursor for the rest!
*/
cdata->system_cursor = id;
} else {
SDL_OutOfMemory ();
SDL_OutOfMemory();
}
return cursor;
@ -224,66 +323,7 @@ CreateCursorFromWlCursor(SDL_VideoData *d, struct wl_cursor *wlcursor)
static SDL_Cursor *
Wayland_CreateDefaultCursor()
{
SDL_VideoDevice *device = SDL_GetVideoDevice();
SDL_VideoData *data = device->driverdata;
return CreateCursorFromWlCursor (data,
WAYLAND_wl_cursor_theme_get_cursor(data->cursor_theme,
"left_ptr"));
}
static SDL_Cursor *
Wayland_CreateSystemCursor(SDL_SystemCursor id)
{
SDL_VideoDevice *vd = SDL_GetVideoDevice();
SDL_VideoData *d = vd->driverdata;
struct wl_cursor *cursor = NULL;
switch(id)
{
default:
SDL_assert(0);
return NULL;
case SDL_SYSTEM_CURSOR_ARROW:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "left_ptr");
break;
case SDL_SYSTEM_CURSOR_IBEAM:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "xterm");
break;
case SDL_SYSTEM_CURSOR_WAIT:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "watch");
break;
case SDL_SYSTEM_CURSOR_CROSSHAIR:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_WAITARROW:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "watch");
break;
case SDL_SYSTEM_CURSOR_SIZENWSE:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_SIZENESW:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_SIZEWE:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_SIZENS:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_SIZEALL:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "hand1");
break;
case SDL_SYSTEM_CURSOR_NO:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "xterm");
break;
case SDL_SYSTEM_CURSOR_HAND:
cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "hand1");
break;
}
return CreateCursorFromWlCursor(d, cursor);
return Wayland_CreateSystemCursor(SDL_SYSTEM_CURSOR_ARROW);
}
static void
@ -300,14 +340,14 @@ Wayland_FreeCursor(SDL_Cursor *cursor)
if (!d)
return;
if (d->buffer && !d->cursor)
if (d->buffer && d->shm_data)
wl_buffer_destroy(d->buffer);
if (d->surface)
wl_surface_destroy(d->surface);
/* Not sure what's meant to happen to shm_data */
SDL_free (cursor->driverdata);
SDL_free(cursor->driverdata);
SDL_free(cursor);
}
@ -317,8 +357,8 @@ Wayland_ShowCursor(SDL_Cursor *cursor)
SDL_VideoDevice *vd = SDL_GetVideoDevice();
SDL_VideoData *d = vd->driverdata;
struct SDL_WaylandInput *input = d->input;
struct wl_pointer *pointer = d->pointer;
float scale = 1.0f;
if (!pointer)
return -1;
@ -327,22 +367,26 @@ Wayland_ShowCursor(SDL_Cursor *cursor)
{
Wayland_CursorData *data = cursor->driverdata;
wl_pointer_set_cursor (pointer,
input->pointer_enter_serial,
data->surface,
data->hot_x,
data->hot_y);
/* TODO: High-DPI custom cursors? -flibit */
if (data->shm_data == NULL) {
if (!wayland_get_system_cursor(d, data, &scale)) {
return -1;
}
}
wl_surface_set_buffer_scale(data->surface, scale);
wl_pointer_set_cursor(pointer,
input->pointer_enter_serial,
data->surface,
data->hot_x / scale,
data->hot_y / scale);
wl_surface_attach(data->surface, data->buffer, 0, 0);
wl_surface_damage(data->surface, 0, 0, data->w, data->h);
wl_surface_commit(data->surface);
}
else
{
wl_pointer_set_cursor (pointer,
input->pointer_enter_serial,
NULL,
0,
0);
wl_pointer_set_cursor(pointer, input->pointer_enter_serial, NULL, 0, 0);
}
return 0;
@ -389,10 +433,12 @@ Wayland_InitMouse(void)
}
void
Wayland_FiniMouse(void)
Wayland_FiniMouse(SDL_VideoData *data)
{
/* This effectively assumes that nobody else
* touches SDL_Mouse which is effectively
* a singleton */
int i;
for (i = 0; i < data->num_cursor_themes; i += 1) {
WAYLAND_wl_cursor_theme_destroy(data->cursor_themes[i].theme);
}
SDL_free(data->cursor_themes);
}
#endif /* SDL_VIDEO_DRIVER_WAYLAND */

2
src/video/wayland/SDL_waylandmouse.h
View File

@ -26,6 +26,6 @@
#if SDL_VIDEO_DRIVER_WAYLAND
extern void Wayland_InitMouse(void);
extern void Wayland_FiniMouse(void);
extern void Wayland_FiniMouse(SDL_VideoData *data);
#endif

6
src/video/wayland/SDL_waylandvideo.c
View File

@ -495,7 +495,6 @@ display_handle_global(void *data, struct wl_registry *registry, uint32_t id,
xdg_wm_base_add_listener(d->shell.xdg, &shell_listener_xdg, NULL);
} else if (SDL_strcmp(interface, "wl_shm") == 0) {
d->shm = wl_registry_bind(registry, id, &wl_shm_interface, 1);
d->cursor_theme = WAYLAND_wl_cursor_theme_load(NULL, 32, d->shm);
} else if (SDL_strcmp(interface, "zwp_relative_pointer_manager_v1") == 0) {
Wayland_display_add_relative_pointer_manager(d, id);
} else if (SDL_strcmp(interface, "zwp_pointer_constraints_v1") == 0) {
@ -618,7 +617,7 @@ Wayland_VideoQuit(_THIS)
SDL_VideoData *data = _this->driverdata;
int i, j;
Wayland_FiniMouse ();
Wayland_FiniMouse(data);
for (i = 0; i < _this->num_displays; ++i) {
SDL_VideoDisplay *display = &_this->displays[i];
@ -671,9 +670,6 @@ Wayland_VideoQuit(_THIS)
if (data->shm)
wl_shm_destroy(data->shm);
if (data->cursor_theme)
WAYLAND_wl_cursor_theme_destroy(data->cursor_theme);
if (data->shell.xdg)
xdg_wm_base_destroy(data->shell.xdg);

8
src/video/wayland/SDL_waylandvideo.h
View File

@ -41,13 +41,19 @@ struct qt_surface_extension;
struct qt_windowmanager;
#endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */
typedef struct {
struct wl_cursor_theme *theme;
int size;
} SDL_WaylandCursorTheme;
typedef struct {
struct wl_display *display;
int display_disconnected;
struct wl_registry *registry;
struct wl_compositor *compositor;
struct wl_shm *shm;
struct wl_cursor_theme *cursor_theme;
SDL_WaylandCursorTheme *cursor_themes;
int num_cursor_themes;
struct wl_pointer *pointer;
struct {
struct xdg_wm_base *xdg;