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cursor: add wlr_cursor_set_xcursor()

Browse source 
This keeps track of the last set XCursor. If it hasn't changed,
skip the texture upload.

In the future, support for animated XCursors can be added.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3436
This commit is contained in:
Simon Ser 2023-06-05 15:31:57 +02:00
parent 58a2f8bd5c
commit da04b066ea
4 changed files with 40 additions and 4 deletions
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9
include/wlr/types/wlr_cursor.h
View file

@ -14,6 +14,7 @@
#include <wlr/types/wlr_output.h>
struct wlr_input_device;
struct wlr_xcursor_manager;
/**
* wlr_cursor implements the behavior of the "cursor", that is, the image on the
@ -146,6 +147,14 @@ void wlr_cursor_set_image(struct wlr_cursor *cur, const uint8_t *pixels,
int32_t stride, uint32_t width, uint32_t height, int32_t hotspot_x,
int32_t hotspot_y, float scale);
/**
* Set the cursor image from an XCursor theme.
*
* The image will be loaded from the struct wlr_xcursor_manager.
*/
void wlr_cursor_set_xcursor(struct wlr_cursor *cur,
struct wlr_xcursor_manager *manager, const char *name);
/**
* Set the cursor surface. The surface can be committed to update the cursor
* image. The surface position is subtracted from the hotspot. A NULL surface

2
include/wlr/types/wlr_xcursor_manager.h
View file

@ -62,6 +62,8 @@ struct wlr_xcursor *wlr_xcursor_manager_get_xcursor(
* scale factors. struct wlr_cursor will take over from this point and ensure
* the correct cursor is used on each output, assuming a
* struct wlr_output_layout is attached to it.
*
* Deprecated: wlr_cursor_set_xcursor() should be used instead.
*/
void wlr_xcursor_manager_set_cursor_image(struct wlr_xcursor_manager *manager,
const char *name, struct wlr_cursor *cursor);

6
tinywl/tinywl.c
View file

@ -449,8 +449,7 @@ static void process_cursor_motion(struct tinywl_server *server, uint32_t time) {
/* If there's no view under the cursor, set the cursor image to a
* default. This is what makes the cursor image appear when you move it
* around the screen, not over any views. */
wlr_xcursor_manager_set_cursor_image(
server->cursor_mgr, "default", server->cursor);
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "default");
}
if (surface) {
/*
@ -927,9 +926,8 @@ int main(int argc, char *argv[]) {
/* Creates an xcursor manager, another wlroots utility which loads up
* Xcursor themes to source cursor images from and makes sure that cursor
* images are available at all scale factors on the screen (necessary for
* HiDPI support). We add a cursor theme at scale factor 1 to begin with. */
* HiDPI support). */
server.cursor_mgr = wlr_xcursor_manager_create(NULL, 24);
wlr_xcursor_manager_load(server.cursor_mgr, 1);
/*
* wlr_cursor *only* displays an image on screen. It does not move around

27
types/wlr_cursor.c
View file

@ -11,6 +11,7 @@
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_tablet_tool.h>
#include <wlr/types/wlr_touch.h>
#include <wlr/types/wlr_xcursor_manager.h>
#include <wlr/util/box.h>
#include <wlr/util/log.h>
#include "types/wlr_output.h"
@ -65,6 +66,9 @@ struct wlr_cursor_output_cursor {
struct wl_listener surface_commit;
struct wl_listener surface_destroy;
struct wl_listener output_commit;
// only when using an XCursor as the cursor image
struct wlr_xcursor *xcursor;
};
struct wlr_cursor_state {
@ -380,6 +384,8 @@ static void cursor_output_cursor_reset_image(
wl_list_init(&output_cursor->surface_commit.link);
wl_list_init(&output_cursor->output_commit.link);
output_cursor->surface = NULL;
output_cursor->xcursor = NULL;
}
static void output_cursor_output_commit_surface(
@ -419,6 +425,27 @@ void wlr_cursor_set_image(struct wlr_cursor *cur, const uint8_t *pixels,
}
}
void wlr_cursor_set_xcursor(struct wlr_cursor *cur,
struct wlr_xcursor_manager *manager, const char *name) {
struct wlr_cursor_output_cursor *output_cursor;
wl_list_for_each(output_cursor, &cur->state->output_cursors, link) {
float scale = output_cursor->output_cursor->output->scale;
wlr_xcursor_manager_load(manager, scale);
struct wlr_xcursor *xcursor = wlr_xcursor_manager_get_xcursor(manager, name, scale);
if (xcursor == NULL || output_cursor->xcursor == xcursor) {
continue;
}
cursor_output_cursor_reset_image(output_cursor);
output_cursor->xcursor = xcursor;
struct wlr_xcursor_image *image = xcursor->images[0];
wlr_output_cursor_set_image(output_cursor->output_cursor,
image->buffer, 4 * image->width, image->width, image->height,
image->hotspot_x, image->hotspot_y);
}
}
static void output_cursor_output_handle_surface_destroy(
struct wl_listener *listener, void *data) {
struct wlr_cursor_output_cursor *output_cursor =