diff options
Diffstat (limited to 'examples/pointer-constraints.c')
| -rw-r--r-- | examples/pointer-constraints.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/examples/pointer-constraints.c b/examples/pointer-constraints.c new file mode 100644 index 00000000..1df9f6ce --- /dev/null +++ b/examples/pointer-constraints.c @@ -0,0 +1,260 @@ +#include <GLES2/gl2.h> +#include <linux/input-event-codes.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <wayland-client.h> +#include <wayland-egl.h> +#include <wlr/render/egl.h> +#include "xdg-shell-client-protocol.h" +#include "pointer-constraints-unstable-v1-client-protocol.h" + +static int width = 512, height = 512; + +static struct wl_compositor *compositor = NULL; +static struct wl_seat *seat = NULL; +static struct xdg_wm_base *wm_base = NULL; +static struct zwp_pointer_constraints_v1 *pointer_constraints = NULL; + +struct wlr_egl egl; +struct wl_egl_window *egl_window; +struct wlr_egl_surface *egl_surface; +struct zwp_locked_pointer_v1* locked_pointer; +struct zwp_confined_pointer_v1* confined_pointer; + +enum { + REGION_TYPE_NONE, + REGION_TYPE_DISJOINT, + REGION_TYPE_JOINT, + REGION_TYPE_MAX +} region_type = REGION_TYPE_NONE; + +struct wl_region *regions[3]; + +static void draw(void) { + eglMakeCurrent(egl.display, egl_surface, egl_surface, egl.context); + + float color[] = {1.0, 1.0, 0.0, 1.0}; + + glViewport(0, 0, width, height); + glClearColor(color[0], color[1], color[2], 1.0); + glClear(GL_COLOR_BUFFER_BIT); + + eglSwapBuffers(egl.display, egl_surface); +} + +static void pointer_handle_button(void *data, struct wl_pointer *pointer, + uint32_t serial, uint32_t time, uint32_t button, uint32_t state_w) { + struct wl_surface *surface = data; + + if (button == BTN_LEFT && state_w == WL_POINTER_BUTTON_STATE_PRESSED) { + region_type = (region_type + 1) % REGION_TYPE_MAX; + + if (locked_pointer) { + zwp_locked_pointer_v1_set_region(locked_pointer, + regions[region_type]); + } else if (confined_pointer) { + zwp_confined_pointer_v1_set_region(confined_pointer, + regions[region_type]); + } + + wl_surface_commit(surface); + } +} + +static void pointer_handle_enter(void *data, struct wl_pointer *wl_pointer, + uint32_t serial, struct wl_surface *surface, + wl_fixed_t surface_x, wl_fixed_t surface_y) { + // This space intentionally left blank +} + +static void pointer_handle_leave(void *data, struct wl_pointer *wl_pointer, + uint32_t serial, struct wl_surface *surface) { + // This space intentionally left blank +} + +static void pointer_handle_motion(void *data, struct wl_pointer *wl_pointer, + uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y) { + // This space intentionally left blank +} + +static void pointer_handle_axis(void *data, struct wl_pointer *wl_pointer, + uint32_t time, uint32_t axis, wl_fixed_t value) { + // This space intentionally left blank +} + +static void pointer_handle_frame(void *data, struct wl_pointer *wl_pointer) { + // This space intentionally left blank +} + +static void pointer_handle_axis_source(void *data, + struct wl_pointer *wl_pointer, uint32_t axis_source) { + // This space intentionally left blank +} + +static void pointer_handle_axis_stop(void *data, + struct wl_pointer *wl_pointer, uint32_t time, uint32_t axis) { + // This space intentionally left blank +} + +static void pointer_handle_axis_discrete(void *data, + struct wl_pointer *wl_pointer, uint32_t axis, int32_t discrete) { + // This space intentionally left blank +} + +static const struct wl_pointer_listener pointer_listener = { + .enter = pointer_handle_enter, + .leave = pointer_handle_leave, + .motion = pointer_handle_motion, + .button = pointer_handle_button, + .axis = pointer_handle_axis, + .frame = pointer_handle_frame, + .axis_source = pointer_handle_axis_source, + .axis_stop = pointer_handle_axis_stop, + .axis_discrete = pointer_handle_axis_discrete, +}; + +static void xdg_surface_handle_configure(void *data, + struct xdg_surface *xdg_surface, uint32_t serial) { + xdg_surface_ack_configure(xdg_surface, serial); + wl_egl_window_resize(egl_window, width, height, 0, 0); + draw(); +} + +static const struct xdg_surface_listener xdg_surface_listener = { + .configure = xdg_surface_handle_configure, +}; + +static void xdg_toplevel_handle_configure(void *data, + struct xdg_toplevel *xdg_toplevel, int32_t w, int32_t h, + struct wl_array *states) { + width = w; + height = h; +} + +static void xdg_toplevel_handle_close(void *data, + struct xdg_toplevel *xdg_toplevel) { + exit(EXIT_SUCCESS); +} + +static const struct xdg_toplevel_listener xdg_toplevel_listener = { + .configure = xdg_toplevel_handle_configure, + .close = xdg_toplevel_handle_close, +}; + +static void handle_global(void *data, struct wl_registry *registry, + uint32_t name, const char *interface, uint32_t version) { + if (strcmp(interface, wl_compositor_interface.name) == 0) { + compositor = wl_registry_bind(registry, name, + &wl_compositor_interface, 1); + } else if (strcmp(interface, xdg_wm_base_interface.name) == 0) { + wm_base = wl_registry_bind(registry, name, &xdg_wm_base_interface, 1); + } else if (strcmp(interface, wl_seat_interface.name) == 0) { + seat = wl_registry_bind(registry, name, &wl_seat_interface, version); + } else if (strcmp(interface, + zwp_pointer_constraints_v1_interface.name) == 0) { + pointer_constraints = wl_registry_bind(registry, name, + &zwp_pointer_constraints_v1_interface, version); + } +} + +static const struct wl_registry_listener registry_listener = { + .global = handle_global, + .global_remove = NULL, +}; + +int main(int argc, char **argv) { + if (argc != 4) { + goto invalid_args; + } + + bool lock; + if (strcmp(argv[1], "lock") == 0) { + lock = true; + } else if (strcmp(argv[1], "confine") == 0) { + lock = false; + } else { + goto invalid_args; + } + + enum zwp_pointer_constraints_v1_lifetime lifetime; + if (strcmp(argv[2], "oneshot") == 0) { + lifetime = ZWP_POINTER_CONSTRAINTS_V1_LIFETIME_ONESHOT; + } else if (strcmp(argv[2], "persistent") == 0) { + lifetime = ZWP_POINTER_CONSTRAINTS_V1_LIFETIME_PERSISTENT; + } else { + goto invalid_args; + } + + if (strcmp(argv[3], "no-region") == 0) { + region_type = REGION_TYPE_NONE; + } else if (strcmp(argv[3], "disjoint-region") == 0) { + region_type = REGION_TYPE_DISJOINT; + } else if (strcmp(argv[3], "joint-region") == 0) { + region_type = REGION_TYPE_JOINT; + } + + struct wl_display *display = wl_display_connect(NULL); + + struct wl_registry *registry = wl_display_get_registry(display); + wl_registry_add_listener(registry, ®istry_listener, NULL); + wl_display_dispatch(display); + wl_display_roundtrip(display); + + struct wl_region *disjoint_region = wl_compositor_create_region(compositor); + wl_region_add(disjoint_region, 0, 0, 255, 256); + wl_region_add(disjoint_region, 257, 0, 255, 256); + regions[REGION_TYPE_DISJOINT] = disjoint_region; + + struct wl_region *joint_region = wl_compositor_create_region(compositor); + wl_region_add(joint_region, 0, 0, 256, 256); + wl_region_add(joint_region, 256, 0, 256, 256); + wl_region_add(joint_region, 256, 256, 256, 256); + regions[REGION_TYPE_JOINT] = joint_region; + + wlr_egl_init(&egl, EGL_PLATFORM_WAYLAND_EXT, display, NULL, + WL_SHM_FORMAT_ARGB8888); + + struct wl_surface *surface = wl_compositor_create_surface(compositor); + struct xdg_surface *xdg_surface = + xdg_wm_base_get_xdg_surface(wm_base, surface); + struct xdg_toplevel *xdg_toplevel = xdg_surface_get_toplevel(xdg_surface); + + xdg_surface_add_listener(xdg_surface, &xdg_surface_listener, NULL); + xdg_toplevel_add_listener(xdg_toplevel, &xdg_toplevel_listener, NULL); + + struct wl_pointer *pointer = wl_seat_get_pointer(seat); + wl_pointer_add_listener(pointer, &pointer_listener, surface); + + if (lock) { + locked_pointer = zwp_pointer_constraints_v1_lock_pointer( + pointer_constraints, surface, pointer, + regions[region_type], lifetime); + + zwp_locked_pointer_v1_set_cursor_position_hint(locked_pointer, + wl_fixed_from_int(128), wl_fixed_from_int(128)); + } else { + confined_pointer = zwp_pointer_constraints_v1_confine_pointer( + pointer_constraints, surface, pointer, + regions[region_type], lifetime); + } + + wl_surface_commit(surface); + + egl_window = wl_egl_window_create(surface, width, height); + egl_surface = wlr_egl_create_surface(&egl, egl_window); + + wl_display_roundtrip(display); + + draw(); + + while (wl_display_dispatch(display) != -1) {} + + return EXIT_SUCCESS; + +invalid_args: + fprintf(stderr, "pointer-constraints <lock | confine> " + "<oneshot | persistent> " + "<no-region | disjoint-rejoin | joint-region>\n"); + return EXIT_FAILURE; +} |