working resize
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138
surface.c
138
surface.c
@ -10,6 +10,7 @@
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#include <sys/mman.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdbool.h>
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struct client_state {
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@ -24,10 +25,13 @@ struct client_state {
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struct wl_surface *wl_surface;
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struct xdg_surface *xdg_surface;
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struct xdg_toplevel *xdg_toplevel;
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/* State */
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float offset;
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uint32_t last_frame;
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int width, height;
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bool closed;
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};
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int WIDTH = 480;
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int HEIGHT = 360;
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/*
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* Create a new, unique, anonymous file of the given size, and
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@ -56,55 +60,90 @@ os_create_anonymous_file(off_t size)
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return fd;
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}
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static struct wl_buffer *
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create_buffer(struct client_state *state) {
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struct wl_shm_pool *pool;
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int stride = WIDTH * 4; // 4 bytes per pixel
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int size = stride * HEIGHT;
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int fd;
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struct wl_buffer *buff;
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static void
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wl_buffer_release(void *data, struct wl_buffer *wl_buffer)
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{
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/* Sent by the compositor when it's no longer using this buffer */
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wl_buffer_destroy(wl_buffer);
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}
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fd = os_create_anonymous_file(size);
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static const struct wl_buffer_listener wl_buffer_listener = {
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.release = wl_buffer_release,
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};
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static struct wl_buffer *
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draw_frame(struct client_state *state) {
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int width = state->width, height = state->height;
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int stride = width * 4; // 4 bytes per pixel
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int size = stride * height;
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int fd = os_create_anonymous_file(size);
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if (fd < 0) {
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fprintf(stderr, "creating a buffer file for %d B failed: %m\n",
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size);
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exit(1);
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}
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void *shm_data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (shm_data == MAP_FAILED) {
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uint32_t *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (data == MAP_FAILED) {
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fprintf(stderr, "mmap failed: %m\n");
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close(fd);
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exit(1);
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}
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uint32_t *pixel = shm_data;
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struct wl_shm_pool *pool = wl_shm_create_pool(state->wl_shm, fd, size);
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struct wl_buffer *buffer = wl_shm_pool_create_buffer(pool, 0,
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width, height, stride, WL_SHM_FORMAT_XRGB8888);
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wl_shm_pool_destroy(pool);
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close(fd);
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fprintf(stderr, "Painting pixels\n");
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// for (int n =0; n < WIDTH*HEIGHT; n++) {
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// *pixel++ = 0xffff;
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// *data++ = 0xffff;
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// }
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/* Draw checkerboxed background */
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for (int y = 0; y < HEIGHT; ++y) {
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for (int x = 0; x < WIDTH; ++x) {
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if ((x + y / 8 * 8) % 16 < 8)
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pixel[y * WIDTH + x] = 0xFF666666;
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int offset = (int)state->offset % 8;
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for (int y = 0; y < height; ++y) {
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for (int x = 0; x < width; ++x) {
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if (((x+offset) + (y+offset) / 8 * 8) % 16 < 8)
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data[y * width + x] = 0xFF666666;
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else
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pixel[y * WIDTH + x] = 0xFFEEEEEE;
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data[y * width + x] = 0xFFEEEEEE;
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}
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}
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pool = wl_shm_create_pool(state->wl_shm, fd, size);
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buff = wl_shm_pool_create_buffer(pool, 0,
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WIDTH, HEIGHT,
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stride,
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WL_SHM_FORMAT_XRGB8888);
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//wl_buffer_add_listener(buffer, &buffer_listener, buffer);
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wl_shm_pool_destroy(pool);
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return buff;
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munmap(data, size);
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wl_buffer_add_listener(buffer, &wl_buffer_listener, NULL);
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return buffer;
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}
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static void
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xdg_toplevel_configure(void *data,
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struct xdg_toplevel *xdg_toplevel, int32_t width, int32_t height,
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struct wl_array *states)
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{
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struct client_state *state = data;
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if (width == 0 || height == 0) {
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/* Compositor is deferring to us */
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return;
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}
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state->width = width;
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state->height = height;
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}
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static void
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xdg_toplevel_close(void *data, struct xdg_toplevel *toplevel)
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{
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struct client_state *state = data;
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state->closed = true;
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}
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static const struct xdg_toplevel_listener xdg_toplevel_listener = {
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.configure = xdg_toplevel_configure,
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.close = xdg_toplevel_close,
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};
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static void
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handle_configure(void *data, struct xdg_surface *xdg_surface, uint32_t serial)
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{
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@ -112,10 +151,9 @@ handle_configure(void *data, struct xdg_surface *xdg_surface, uint32_t serial)
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xdg_surface_ack_configure(xdg_surface, serial);
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fprintf(stderr, "xdg_surface configured\n");
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state->wl_buffer = create_buffer(state);
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wl_surface_attach(state->wl_surface, state->wl_buffer, 0, 0);
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//wl_surface_damage(surface, 0, 0, WIDTH, HEIGHT);
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struct wl_buffer *buffer = draw_frame(state);
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wl_surface_attach(state->wl_surface, buffer, 0, 0);
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wl_surface_damage(state->wl_surface, 0, 0, INT32_MAX, INT32_MAX);
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wl_surface_commit(state->wl_surface);
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}
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@ -154,7 +192,7 @@ global_registry_handler(void *data, struct wl_registry *registry, uint32_t id,
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if (strcmp(interface, wl_compositor_interface.name) == 0) {
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state->wl_compositor = wl_registry_bind(registry, id,
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&wl_compositor_interface, 4);
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&wl_compositor_interface, 1);
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} else if (strcmp(interface, wl_shm_interface.name) == 0) {
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state->wl_shm = wl_registry_bind(registry, id, &wl_shm_interface, 1);
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@ -178,10 +216,41 @@ static const struct wl_registry_listener registry_listener = {
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global_registry_remover
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};
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static const struct wl_callback_listener wl_surface_frame_listener;
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static void
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wl_surface_frame_done(void *data, struct wl_callback *cb, uint32_t time)
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{
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// Destroy this callback
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wl_callback_destroy(cb);
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// Request another frame
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struct client_state *state = data;
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cb = wl_surface_frame(state->wl_surface);
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wl_callback_add_listener(cb, &wl_surface_frame_listener, state);
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if (state->last_frame != 0) {
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int elapsed = time - state->last_frame;
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state->offset += elapsed / 1000.0 * 24;
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}
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struct wl_buffer *buffer = draw_frame(state);
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wl_surface_attach(state->wl_surface, buffer, 0, 0);
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wl_surface_damage(state->wl_surface, 0, 0, INT32_MAX, INT32_MAX);
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wl_surface_commit(state->wl_surface);
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state->last_frame = time;
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}
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static const struct wl_callback_listener wl_surface_frame_listener = {
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.done = wl_surface_frame_done,
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};
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int main(int argc, char **argv) {
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struct client_state state = { 0 };
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state.width = 640;
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state.height = 480;
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state.wl_display = wl_display_connect(NULL);
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if (state.wl_display == NULL) {
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@ -212,6 +281,8 @@ int main(int argc, char **argv) {
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} else {
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fprintf(stderr, "Created surface\n");
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}
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struct wl_callback *cb = wl_surface_frame(state.wl_surface);
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wl_callback_add_listener(cb, &wl_surface_frame_listener, &state);
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if (state.xdg_wm_base == NULL) {
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fprintf(stderr, "no wm_base\n");
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@ -233,6 +304,7 @@ int main(int argc, char **argv) {
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} else {
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fprintf(stderr, "got xdg_toplevel\n");
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}
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xdg_toplevel_add_listener(state.xdg_toplevel, &xdg_toplevel_listener, &state);
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xdg_toplevel_set_title(state.xdg_toplevel, "A surface");
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wl_surface_commit(state.wl_surface);
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