diff options
Diffstat (limited to 'examples/relative-pointer-unstable-v1.c')
| -rw-r--r-- | examples/relative-pointer-unstable-v1.c | 489 |
1 files changed, 0 insertions, 489 deletions
diff --git a/examples/relative-pointer-unstable-v1.c b/examples/relative-pointer-unstable-v1.c deleted file mode 100644 index 6722a5b9..00000000 --- a/examples/relative-pointer-unstable-v1.c +++ /dev/null @@ -1,489 +0,0 @@ -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <GLES2/gl2.h> -#include <linux/input-event-codes.h> -#include <wayland-egl.h> -#include "egl_common.h" -#include "pointer-constraints-unstable-v1-client-protocol.h" -#include "relative-pointer-unstable-v1-client-protocol.h" -#include "xdg-shell-client-protocol.h" - - -/** - * structs storing global state - * - * These are passed around as user data in the wayland globals. - */ - -struct egl_info { - struct wl_egl_window *egl_window; - struct wlr_egl_surface *egl_surface; - uint32_t width; - uint32_t height; - struct wl_surface *surface; - struct wl_callback *frame_callback; -}; - -struct window { - struct egl_info *egl_info; - struct wl_pointer *pointer; - struct zwp_locked_pointer_v1 *locked_pointer; - struct zwp_relative_pointer_v1 *relative_pointer; - int32_t pointer_x, pointer_y; - uint32_t last_draw; -}; - - -/** - * surface handling and helpers - * - * draw_cursor and draw_relative_cursor draw a small 5px by 5px box around the - * cursor and relative motion coordinates respectively. draw_background colors - * the background black. - * - * The functions are somewhat duplicated, but it doesn't really matter. - */ - -static void surface_callback_handle_done(void *data, - struct wl_callback *callback, uint32_t time) { - wl_callback_destroy(callback); - struct egl_info *e = data; - e->frame_callback = NULL; -} - -static struct wl_callback_listener surface_callback_listener = { - .done = surface_callback_handle_done, -}; - -static void draw_init(struct egl_info *e) { - eglMakeCurrent(egl_display, e->egl_surface, - e->egl_surface, egl_context); - glViewport(0, 0, e->width, e->height); -} - -static void draw_cursor(struct egl_info *e, int32_t x, int32_t y) { - glEnable(GL_SCISSOR_TEST); - glScissor(x, e->height - y, 5, 5); - glClearColor(1.0f, 1.0f, 1.0f, 1.0f); /* white */ - glClear(GL_COLOR_BUFFER_BIT); - glDisable(GL_SCISSOR_TEST); -} - -static void draw_relative_cursor(struct egl_info *e, int32_t x, int32_t y) { - glEnable(GL_SCISSOR_TEST); - glScissor(x, e->height - y, 5, 5); - glClearColor(1.0f, 0.0f, 0.0f, 1.0f); /* red */ - glClear(GL_COLOR_BUFFER_BIT); - glDisable(GL_SCISSOR_TEST); -} - -static void draw_background(struct egl_info *e) { - glClearColor(0.0f, 0.0f, 0.0f, 1.0f); /* black */ - glClear(GL_COLOR_BUFFER_BIT); -} - -static void draw_end(struct egl_info *e) { - e->frame_callback = wl_surface_frame(e->surface); - wl_callback_add_listener(e->frame_callback, &surface_callback_listener, e); - - eglSwapBuffers(egl_display, e->egl_surface); -} - - -/** - * registry and globals handling - */ - -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; -static struct zwp_relative_pointer_manager_v1 *relative_pointer_manager = NULL; - -static void registry_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, version); - } else if (strcmp(interface, xdg_wm_base_interface.name) == 0) { - wm_base = wl_registry_bind(registry, name, - &xdg_wm_base_interface, version); - } 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); - } else if (strcmp(interface, zwp_relative_pointer_manager_v1_interface.name) == 0) { - relative_pointer_manager = wl_registry_bind(registry, name, - &zwp_relative_pointer_manager_v1_interface, version); - } -} - -static void registry_handle_global_remove(void *data, struct wl_registry *registry, - uint32_t time) { - /* This space intentionally left blank */ -} - -static const struct wl_registry_listener registry_listener = { - .global = registry_handle_global, - .global_remove = registry_handle_global_remove, -}; - - -/** - * xdg_surface handling - */ - -static void xdg_surface_handle_configure(void *data, - struct xdg_surface *xdg_surface, uint32_t serial) { - struct egl_info *e = data; - xdg_surface_ack_configure(xdg_surface, serial); - wl_egl_window_resize(e->egl_window, e->width, e->height, 0, 0); - draw_init(e); - draw_background(e); - draw_end(e); -} - -static const struct xdg_surface_listener xdg_surface_listener = { - .configure = xdg_surface_handle_configure, -}; - - -/** - * xdg_toplevel handling - */ - -static void xdg_toplevel_handle_configure(void *data, - struct xdg_toplevel *xdg_toplevel, int32_t width, int32_t height, - struct wl_array *states) { - struct egl_info *e = data; - // TODO: Why do we get 0,0 on initialization here? (in rootston) - if (width == 0 && height == 0) { - return; - } - e->width = width; - e->height = height; -} - -static void xdg_toplevel_handle_close(void *data, - struct xdg_toplevel *xdg_toplevel) { - egl_finish(); - exit(EXIT_SUCCESS); -} - -static const struct xdg_toplevel_listener xdg_toplevel_listener = { - .configure = xdg_toplevel_handle_configure, - .close = xdg_toplevel_handle_close, -}; - - -/** - * zwp_locked_pointer handling - * - * Pointer unlocks need to be handled properly since the relative pointer needs - * to be released as well. Unlocks happen when the focus is changed, for - * example. - */ - -static void locked_pointer_handle_locked(void *data, - struct zwp_locked_pointer_v1 *zwp_locked_pointer_v1) { - /* This space intentionally left blank */ -} - -static void locked_pointer_handle_unlocked(void *data, - struct zwp_locked_pointer_v1 *zwp_locked_pointer_v1) { - struct window *w = data; - /* The locked pointer doesn't need to be destroyed since it was oneshot */ - w->locked_pointer = NULL; - if (w->relative_pointer) { - /* Destroy the relative pointer */ - zwp_relative_pointer_v1_destroy(w->relative_pointer); - w->relative_pointer = NULL; - } - draw_init(w->egl_info); - draw_background(w->egl_info); - draw_end(w->egl_info); -} - -static const struct zwp_locked_pointer_v1_listener locked_pointer_listener = { - .locked = locked_pointer_handle_locked, - .unlocked = locked_pointer_handle_unlocked, -}; - - -/** - * zwp_relative_pointer handling - * - * Handling relative_motion events is the meat of the code. The handler simply - * tries to indicate what the deltas look like. - */ - -static void relative_pointer_handle_relative_motion(void *data, - struct zwp_relative_pointer_v1 *zwp_relative_pointer_v1, - uint32_t utime_hi, uint32_t utime_lo, - wl_fixed_t dx, wl_fixed_t dy, - wl_fixed_t dx_unaccel, wl_fixed_t dy_unaccel) { - struct window *w = data; - - /** - * This renders the last location of the pointer (before it as locked), as - * well as what the position would have been after the given relative - * motion. Note that, if the device sends absolute motion events, the - * cursor location after relative motion is always identical to the actual - * cursor position. - */ - uint64_t utime = (((uint64_t) utime_hi << 32) + utime_lo) / 1000; - if (utime - w->last_draw > 30 && w->egl_info->frame_callback == NULL) { - w->last_draw = utime; - - struct egl_info *e = w->egl_info; - draw_init(e); - draw_background(e); - draw_cursor(e, w->pointer_x, w->pointer_y); - draw_relative_cursor(e, w->pointer_x + wl_fixed_to_int(dx), - w->pointer_y + wl_fixed_to_int(dy)); - draw_end(e); - } -} - -static const struct zwp_relative_pointer_v1_listener relative_pointer_listener = { - .relative_motion = relative_pointer_handle_relative_motion, -}; - - -/** - * wl_pointer handling - * - * The client toggles between locking the pointer and receiving relative motion - * events, and releasing the locked pointer and falling back to normal motion - * events, on a mouse button one (left mouse button) click. - * - * It additionally removes the cursor image, and indicates the pointer location - * via a small white box. - */ - -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 window *w = data; - struct egl_info *e = w->egl_info; - - if (button == BTN_LEFT && state_w == WL_POINTER_BUTTON_STATE_PRESSED) { - if (w->locked_pointer == NULL && w->relative_pointer == NULL) { - /* Get a locked pointer and add listener */ - w->locked_pointer = zwp_pointer_constraints_v1_lock_pointer( - pointer_constraints, w->egl_info->surface, w->pointer, NULL, - ZWP_POINTER_CONSTRAINTS_V1_LIFETIME_ONESHOT); - zwp_locked_pointer_v1_add_listener(w->locked_pointer, - &locked_pointer_listener, w); - - /* Get relative pointer and add listener */ - w->relative_pointer = zwp_relative_pointer_manager_v1_get_relative_pointer( - relative_pointer_manager, w->pointer); - zwp_relative_pointer_v1_add_listener(w->relative_pointer, - &relative_pointer_listener, w); - - /* Commit the surface and render */ - wl_surface_commit(e->surface); - - draw_init(e); - draw_background(e); - draw_cursor(e, w->pointer_x, w->pointer_y); - draw_end(e); - } else if (w->locked_pointer && w->relative_pointer) { - /* Destroy the locked pointer */ - zwp_locked_pointer_v1_destroy(w->locked_pointer); - w->locked_pointer = NULL; - - /* Destroy the relative pointer */ - zwp_relative_pointer_v1_destroy(w->relative_pointer); - w->relative_pointer = NULL; - - /* Render */ - draw_init(e); - draw_background(e); - draw_cursor(e, w->pointer_x, w->pointer_y); - draw_end(e); - } else { - fprintf(stderr, "Unknown state!\n"); - exit(EXIT_FAILURE); - } - } -} - -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) { - struct window *w = data; - wl_pointer_set_cursor(w->pointer, serial, NULL, 0, 0); -} - -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) { - struct window *w = data; - struct egl_info *e = w->egl_info; - w->pointer_x = wl_fixed_to_int(surface_x); - w->pointer_y = wl_fixed_to_int(surface_y); - if (time - w->last_draw > 30 && e->frame_callback == NULL) { - w->last_draw = time; - draw_init(e); - draw_background(e); - draw_cursor(e, w->pointer_x, w->pointer_y); - draw_end(e); - } -} - -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, -}; - - -/** - * relative-pointer: - * - * This client servers as an example for the relative-pointer-v1 protocol, and - * to some extent the pointer-constraints protocol as well (the locked_pointer - * interface). - * - * The intended behavior is the following. In the default state, the client - * shows a black background, and renders the pointer location as a small white - * box. No cursor is shown. In the locked state, the pointer is locked and the - * client only listens for relative motion events, which are rendered relative - * to the last unlocked pointer location by a small red box. Clicking with the - * left mouse button toggles the state. - * - * Most of the code is standard. The interesting stuff happens in "wl_pointer - * handling" (toggling states), and "zwp_relative_pointer handling" (rendering - * relative motion events). - */ - -int main(int argc, char **argv) { - - /* Connect to the display */ - - struct wl_display *display = wl_display_connect(NULL); - if (display == NULL) { - fprintf(stderr, "Could not connect to a Wayland display\n"); - return EXIT_FAILURE; - } - - /* Get the registry and set listeners */ - - struct wl_registry *registry = wl_display_get_registry(display); - wl_registry_add_listener(registry, ®istry_listener, NULL); - wl_display_roundtrip(display); - - /* Check that all the global interfaces were captured */ - - if (compositor == NULL) { - fprintf(stderr, "wl_compositor not available\n"); - return EXIT_FAILURE; - } - if (seat == NULL) { - fprintf(stderr, "wl_seat not available\n"); - return EXIT_FAILURE; - } - if (wm_base == NULL) { - fprintf(stderr, "xdg_wm_base not available\n"); - return EXIT_FAILURE; - } - if (pointer_constraints == NULL) { - fprintf(stderr, "zwp_pointer_constraints_v1 not available\n"); - return EXIT_FAILURE; - } - if (relative_pointer_manager == NULL) { - fprintf(stderr, "zwp_relative_pointer_manager_v1 not available\n"); - return EXIT_FAILURE; - } - - /* Initialize EGL context */ - - struct egl_info *e = calloc(1, sizeof(*e)); - e->width = e->height = 512; - - egl_init(display); - - /* Create the surface and xdg_toplevels, and set listeners */ - - 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, e); - xdg_toplevel_add_listener(xdg_toplevel, &xdg_toplevel_listener, e); - - /* Create the egl window and surface */ - - wl_surface_commit(surface); - - e->egl_window = wl_egl_window_create(surface, e->width, e->height); - e->egl_surface = eglCreatePlatformWindowSurfaceEXT( - egl_display, egl_config, e->egl_window, NULL); - e->surface = surface; - - wl_display_roundtrip(display); - - /* Setup global state and render */ - - struct window *w = calloc(1, sizeof(*w)); - w->egl_info = e; - - draw_init(e); - draw_background(e); - draw_end(e); - - /* Setup the pointer */ - - struct wl_pointer *pointer = wl_seat_get_pointer(seat); - wl_pointer_add_listener(pointer, &pointer_listener, w); - - w->pointer = pointer; - - /* Run display */ - - while (wl_display_dispatch(display) != -1) { - /* This space intentionally left blank */ - } - - return EXIT_SUCCESS; -} |