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[client] wayland: implement cursor handling

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This commit adds code to load the looking glass cursor and display it
when needed. Otherwise, the cursor is hidden.
This commit is contained in:
Quantum 2021-01-26 23:06:02 -05:00 committed by Geoffrey McRae
parent 081d76268a
commit 265370b0f5
1 changed files with 64 additions and 1 deletions
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65
client/displayservers/Wayland/wayland.c
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@ -17,6 +17,7 @@ this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define _GNU_SOURCE
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
@ -54,6 +55,7 @@ struct WaylandDSState
struct wl_surface * surface;
struct wl_registry * registry;
struct wl_seat * seat;
struct wl_shm * shm;
struct wl_compositor * compositor;
int32_t width, height;
@ -68,6 +70,8 @@ struct WaylandDSState
struct xdg_surface * xdgSurface;
struct xdg_toplevel * xdgToplevel;
struct wl_surface * cursor;
struct wl_data_device_manager * dataDeviceManager;
struct wl_data_device * dataDevice;
@ -83,6 +87,8 @@ struct WaylandDSState
struct zwp_pointer_constraints_v1 * pointerConstraints;
struct zwp_relative_pointer_v1 * relativePointer;
struct zwp_confined_pointer_v1 * confinedPointer;
bool showPointer;
uint32_t pointerEnterSerial;
struct zwp_idle_inhibit_manager_v1 * idleInhibitManager;
struct zwp_idle_inhibitor_v1 * idleInhibitor;
@ -111,6 +117,49 @@ struct WCBState
static struct WaylandDSState wm;
static struct WCBState wcb;
static const uint32_t cursorBitmap[] = {
0x000000, 0x000000, 0x000000, 0x000000,
0x000000, 0xFFFFFF, 0xFFFFFF, 0x000000,
0x000000, 0xFFFFFF, 0xFFFFFF, 0x000000,
0x000000, 0x000000, 0x000000, 0x000000,
};
static struct wl_buffer * createCursorBuffer(void)
{
int fd = memfd_create("lg-cursor", 0);
if (fd < 0)
{
DEBUG_ERROR("Failed to create cursor shared memory: %d", errno);
return NULL;
}
struct wl_buffer * result = NULL;
if (ftruncate(fd, sizeof cursorBitmap) < 0)
{
DEBUG_ERROR("Failed to ftruncate cursor shared memory: %d", errno);
goto fail;
}
void * shm_data = mmap(NULL, sizeof cursorBitmap, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (shm_data == MAP_FAILED)
{
DEBUG_ERROR("Failed to map memory for cursor: %d", errno);
goto fail;
}
struct wl_shm_pool * pool = wl_shm_create_pool(wm.shm, fd, sizeof cursorBitmap);
result = wl_shm_pool_create_buffer(pool, 0, 4, 4, 16, WL_SHM_FORMAT_XRGB8888);
wl_shm_pool_destroy(pool);
memcpy(shm_data, cursorBitmap, sizeof cursorBitmap);
munmap(shm_data, sizeof cursorBitmap);
fail:
close(fd);
return result;
}
// XDG WM base listeners.
static void xdgWmBasePing(void * data, struct xdg_wm_base * xdgWmBase, uint32_t serial)
@ -129,6 +178,8 @@ static void registryGlobalHandler(void * data, struct wl_registry * registry,
{
if (!strcmp(interface, wl_seat_interface.name) && !wm.seat)
wm.seat = wl_registry_bind(wm.registry, name, &wl_seat_interface, 1);
else if (!strcmp(interface, wl_shm_interface.name))
wm.shm = wl_registry_bind(wm.registry, name, &wl_shm_interface, 1);
else if (!strcmp(interface, wl_compositor_interface.name))
wm.compositor = wl_registry_bind(wm.registry, name, &wl_compositor_interface, 4);
else if (!strcmp(interface, xdg_wm_base_interface.name))
@ -181,6 +232,9 @@ static void pointerEnterHandler(void * data, struct wl_pointer * pointer,
{
app_handleEnterEvent(true);
wl_pointer_set_cursor(pointer, serial, wm.showPointer ? wm.cursor : NULL, 0, 0);
wm.pointerEnterSerial = serial;
if (wm.relativePointer)
return;
@ -456,6 +510,14 @@ static bool waylandInit(const LG_DSInitParams params)
wl_surface_commit(wm.surface);
struct wl_buffer * cursorBuffer = createCursorBuffer();
if (cursorBuffer)
{
wm.cursor = wl_compositor_create_surface(wm.compositor);
wl_surface_attach(wm.cursor, cursorBuffer, 0, 0);
wl_surface_commit(wm.cursor);
}
wm.width = params.w;
wm.height = params.h;
@ -527,7 +589,8 @@ static void waylandGLSwapBuffers(void)
static void waylandShowPointer(bool show)
{
// FIXME: implement.
wm.showPointer = show;
wl_pointer_set_cursor(wm.pointer, wm.pointerEnterSerial, show ? wm.cursor : NULL, 0, 0);
}
static void waylandWait(unsigned int time)