commit: 6d72e874e75b7c9698e003b179e1e17b30cf6446
parent b2e206d778f835daae17552123ee01df7e1dc858
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date: Sat, 20 Feb 2021 16:40:37 +0100
C/wayland: New
Diffstat:
| M | C/Makefile | 17 | +++++++++++++++++ |
| A | C/wayland.c | 263 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
2 files changed, 280 insertions(+), 0 deletions(-)
diff --git a/C/Makefile b/C/Makefile
@@ -1,6 +1,23 @@
+WAYLAND_PROTOCOLS=`pkg-config --variable=pkgdatadir wayland-protocols`
+WAYLAND_SCANNER=`pkg-config --variable=wayland_scanner wayland-scanner`
+
+all: AU\ 8-bit\ 8kHz.c SDL_YUV_visualisation wayland
+
+AU\ 8-bit\ 8kHz: AU\ 8-bit\ 8kHz.c au.h
+
SDL_YUV_visualisation: SDL_YUV_visualisation.c
$(CC) $(CFLAGS) SDL_YUV_visualisation.c -o SDL_YUV_visualisation `sdl2-config --cflags --libs`
+xdg-shell-client-protocol.h:
+ $(WAYLAND_SCANNER) client-header $(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
+
+xdg-shell-protocol.c: xdg-shell-client-protocol.h
+ $(WAYLAND_SCANNER) private-code $(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
+
+wayland: wayland.c xdg-shell-protocol.c
+ $(CC) $(CFLAGS) -o $@ $< xdg-shell-protocol.c -lwayland-client -lrt
+
.PHONY: clean
clean:
rm SDL_YUV_visualisation
+ rm wayland
diff --git a/C/wayland.c b/C/wayland.c
@@ -0,0 +1,263 @@
+#define _POSIX_C_SOURCE 200112L
+#include "xdg-shell-client-protocol.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <time.h>
+#include <unistd.h>
+#include <wayland-client.h>
+
+/* Shared memory support code */
+static void
+randname(char *buf)
+{
+ struct timespec ts;
+ clock_gettime(CLOCK_REALTIME, &ts);
+ long r = ts.tv_nsec;
+ for(int i = 0; i < 6; ++i)
+ {
+ buf[i] = 'A' + (r & 15) + (r & 16) * 2;
+ r >>= 5;
+ }
+}
+
+static int
+create_shm_file(void)
+{
+ int retries = 100;
+ do
+ {
+ char name[] = "/wl_shm-XXXXXX";
+ randname(name + sizeof(name) - 7);
+ --retries;
+ int fd = shm_open(name, O_RDWR | O_CREAT | O_EXCL, 0600);
+ if(fd >= 0)
+ {
+ shm_unlink(name);
+ return fd;
+ }
+ } while(retries > 0 && errno == EEXIST);
+ return -1;
+}
+
+static int
+allocate_shm_file(size_t size)
+{
+ int fd = create_shm_file();
+ if(fd < 0) return -1;
+ int ret;
+ do
+ {
+ ret = ftruncate(fd, size);
+ } while(ret < 0 && errno == EINTR);
+ if(ret < 0)
+ {
+ close(fd);
+ return -1;
+ }
+ return fd;
+}
+
+/* Wayland code */
+struct client_state
+{
+ /* Globals */
+ struct wl_display *wl_display;
+ struct wl_registry *wl_registry;
+ struct wl_shm *wl_shm;
+ struct wl_compositor *wl_compositor;
+ struct xdg_wm_base *xdg_wm_base;
+ /* Objects */
+ struct wl_surface *wl_surface;
+ struct xdg_surface *xdg_surface;
+ struct xdg_toplevel *xdg_toplevel;
+ /* State */
+ float offset;
+ uint32_t last_frame;
+};
+
+static void
+wl_buffer_release(void *data, struct wl_buffer *wl_buffer)
+{
+ /* Sent by the compositor when it's no longer using this buffer */
+ wl_buffer_destroy(wl_buffer);
+}
+
+static const struct wl_buffer_listener wl_buffer_listener = {
+ .release = wl_buffer_release,
+};
+
+static struct wl_buffer *
+draw_frame(struct client_state *state)
+{
+ const int width = 800, height = 800;
+ int stride = width * 4;
+ int size = stride * height;
+
+ int fd = allocate_shm_file(size);
+ if(fd == -1)
+ {
+ return NULL;
+ }
+
+ uint32_t *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if(data == MAP_FAILED)
+ {
+ close(fd);
+ return NULL;
+ }
+
+ struct wl_shm_pool *pool = wl_shm_create_pool(state->wl_shm, fd, size);
+ struct wl_buffer *buffer =
+ wl_shm_pool_create_buffer(pool, 0, width, height, stride, WL_SHM_FORMAT_XRGB8888);
+ wl_shm_pool_destroy(pool);
+ close(fd);
+
+ int t = (int)state->offset;
+ /* Let the fun begin! */
+ for(int y = 0; y < height; ++y)
+ {
+ for(int x = 0; x < width; ++x)
+ {
+ //if (((x + offset) + (y + offset) / 8 * 8) % 16 < 8)
+ // data[y * width + x] = 0xFF666666;
+ //else
+ // data[y * width + x] = 0xFFEEEEEE;
+
+ // munching squares
+ data[y * width + x] = (x-t|y-t)+t<<t%16;
+
+ //glichy munching squares
+ //data[y * width + x] = (x|y)*t;
+
+ // color enumeration
+ //data[y * width + x] = t*2|t*4<<8|t*8<<16;
+ }
+ }
+
+ munmap(data, size);
+ wl_buffer_add_listener(buffer, &wl_buffer_listener, NULL);
+ return buffer;
+}
+
+static void
+xdg_surface_configure(void *data, struct xdg_surface *xdg_surface, uint32_t serial)
+{
+ struct client_state *state = data;
+ xdg_surface_ack_configure(xdg_surface, serial);
+
+ struct wl_buffer *buffer = draw_frame(state);
+ wl_surface_attach(state->wl_surface, buffer, 0, 0);
+ wl_surface_commit(state->wl_surface);
+}
+
+static const struct xdg_surface_listener xdg_surface_listener = {
+ .configure = xdg_surface_configure,
+};
+
+static void
+xdg_wm_base_ping(void *data, struct xdg_wm_base *xdg_wm_base, uint32_t serial)
+{
+ xdg_wm_base_pong(xdg_wm_base, serial);
+}
+
+static const struct xdg_wm_base_listener xdg_wm_base_listener = {
+ .ping = xdg_wm_base_ping,
+};
+
+static const struct wl_callback_listener wl_surface_frame_listener;
+static void
+wl_surface_frame_done(void *data, struct wl_callback *cb, uint32_t time)
+{
+ /* Destroy this callback */
+ wl_callback_destroy(cb);
+
+ /* Request another frame */
+ struct client_state *state = data;
+ cb = wl_surface_frame(state->wl_surface);
+ wl_callback_add_listener(cb, &wl_surface_frame_listener, state);
+
+ /* Update scroll amount at 24 pixels per second */
+ if (state->last_frame != 0) {
+ int elapsed = time - state->last_frame;
+ state->offset += elapsed / 1000.0 * 24;
+ }
+
+ /* Submit a frame for this event */
+ struct wl_buffer *buffer = draw_frame(state);
+ wl_surface_attach(state->wl_surface, buffer, 0, 0);
+ wl_surface_damage_buffer(state->wl_surface, 0, 0, INT32_MAX, INT32_MAX);
+ wl_surface_commit(state->wl_surface);
+
+ state->last_frame = time;
+}
+
+static const struct wl_callback_listener wl_surface_frame_listener = {
+ .done = wl_surface_frame_done,
+};
+
+static void
+registry_global(void *data,
+ struct wl_registry *wl_registry,
+
+ uint32_t name,
+ const char *interface,
+ uint32_t version)
+{
+ struct client_state *state = data;
+ if(strcmp(interface, wl_shm_interface.name) == 0)
+ {
+ state->wl_shm = wl_registry_bind(wl_registry, name, &wl_shm_interface, 1);
+ }
+ else if(strcmp(interface, wl_compositor_interface.name) == 0)
+ {
+ state->wl_compositor = wl_registry_bind(wl_registry, name, &wl_compositor_interface, 4);
+ }
+ else if(strcmp(interface, xdg_wm_base_interface.name) == 0)
+ {
+ state->xdg_wm_base = wl_registry_bind(wl_registry, name, &xdg_wm_base_interface, 1);
+ xdg_wm_base_add_listener(state->xdg_wm_base, &xdg_wm_base_listener, state);
+ }
+}
+
+static void
+registry_global_remove(void *data, struct wl_registry *wl_registry, uint32_t name)
+{
+ /* This space deliberately left blank */
+}
+
+static const struct wl_registry_listener wl_registry_listener = {
+ .global = registry_global,
+ .global_remove = registry_global_remove,
+};
+
+int
+main(int argc, char *argv[])
+{
+ struct client_state state = {0};
+ state.wl_display = wl_display_connect(NULL);
+ state.wl_registry = wl_display_get_registry(state.wl_display);
+ wl_registry_add_listener(state.wl_registry, &wl_registry_listener, &state);
+ wl_display_roundtrip(state.wl_display);
+
+ state.wl_surface = wl_compositor_create_surface(state.wl_compositor);
+ state.xdg_surface = xdg_wm_base_get_xdg_surface(state.xdg_wm_base, state.wl_surface);
+ xdg_surface_add_listener(state.xdg_surface, &xdg_surface_listener, &state);
+ state.xdg_toplevel = xdg_surface_get_toplevel(state.xdg_surface);
+ xdg_toplevel_set_title(state.xdg_toplevel, "Example client");
+ wl_surface_commit(state.wl_surface);
+
+ struct wl_callback *cb = wl_surface_frame(state.wl_surface);
+ wl_callback_add_listener(cb, &wl_surface_frame_listener, &state);
+
+ while(wl_display_dispatch(state.wl_display))
+ {
+ /* This space deliberately left blank */
+ }
+
+ return 0;
+}
