Attachment 100804 Details for Bug 79684 – A simpler program that can control the depth of nested surfaces

A simpler program that can control the depth of nested surfaces

sub2.c (text/plain), 5.70 KB, created by Boyan Ding on 2014-06-10 12:05:33 UTC

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Creator: Boyan Ding

Created: 2014-06-10 12:05:33 UTC

Size: 5.70 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <stdint.h>
>#include <stdarg.h>
>#include <string.h>
>#include <assert.h>
>#include <unistd.h>
>#include <fcntl.h>
>#include <sys/mman.h>
>
>#include <wayland-client.h>
>#include <wayland-util.h>
>
>struct surface {
>	struct context *context;
>	struct wl_surface *surface;
>	struct wl_subsurface *subsurface;
>	struct wl_buffer *buffer;
>
>	int height;
>	int width;
>	int stride;
>	int fd;
>	uint32_t *data;
>	uint32_t color;
>	
>	struct surface *parent;
>	struct wl_list children;
>	struct wl_list link;
>};
>
>struct context {
>	struct wl_display *display;
>	struct wl_registry *registry;
>	struct wl_compositor *compositor;
>	struct wl_subcompositor *subcompositor;
>	struct wl_shell *shell;
>	struct wl_shm *shm;
>	struct surface *root_surface;
>	struct wl_shell_surface *shell_surface;
>};
>
>static void
>die(const char *fmt, ...)
>{
>	va_list ap;
>
>	va_start(ap, fmt);
>	vfprintf(stderr, fmt, ap);
>	fprintf(stderr, "\n");
>	va_end(ap);
>	exit(EXIT_FAILURE);
>}
>
>static int
>surface_alloc_data(struct surface *surface)
>{
>	char filename[] = "/tmp/wayland-shm-XXXXXX";
>	uint32_t *data;
>	int stride;
>	int size;
>	int fd;
>	int i;
>
>	fd = mkstemp(filename);
>	if (fd < 0)
>		die("failed to create file for SHM buffer: %m");
>
>	unlink(filename);
>
>	stride = surface->width * 4;
>	size = surface->height * stride;
>
>	if (fallocate(fd, 0, 0, size) < 0)
>		die("failed to create %d bytes for SHM buffer: %m", size);
>
>	data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
>	if (data == MAP_FAILED)
>		die("failed to map SHM buffer data: %m");
>
>	for (i = 0; i < surface->width * surface->height; i++)
>		data[i] = surface->color;
>
>	surface->fd = fd;
>	surface->data = data;
>	surface->stride = stride;
>
>	return 0;
>}
>
>static struct surface *
>surface_create(struct context *context, struct surface *parent,
>	       int width, int height, int x, int y, uint32_t color)
>{
>	struct surface *surface;
>	struct wl_shm_pool *pool;
>
>	surface = calloc(1, sizeof *surface);
>	if (!surface)
>		return NULL;
>
>	surface->fd = -1;
>	surface->context = context;
>	surface->width = width;
>	surface->height = height;
>	surface->color = color;
>	surface->parent = parent;
>
>	wl_list_init(&surface->children);
>	wl_list_init(&surface->link);
>
>	if (surface_alloc_data(surface)) {
>		free(surface);
>		return NULL;
>	}
>
>	pool = wl_shm_create_pool(context->shm, surface->fd,
>				  surface->stride * surface->height);
>
>	surface->buffer = wl_shm_pool_create_buffer(pool, 0, surface->width,
>						    surface->height,
>						    surface->stride,
>						    WL_SHM_FORMAT_ARGB8888);
>
>	wl_shm_pool_destroy(pool);
>
>	surface->surface = wl_compositor_create_surface(context->compositor);
>	if (surface->parent) {
>		surface->subsurface = wl_subcompositor_get_subsurface(
>			context->subcompositor, surface->surface,
>			parent->surface);
>
>		wl_subsurface_set_position(surface->subsurface, x, y);
>
>		wl_list_insert(&parent->children, &surface->link);
>	}
>
>	wl_surface_attach(surface->surface, surface->buffer, 0, 0);
>	wl_surface_damage(surface->surface, 0, 0,
>			  surface->width, surface->height);
>
>	if (surface->parent)
>		wl_surface_commit(surface->surface);
>
>	return surface;
>}
>
>static void
>create_subsurfaces(struct surface *surface, int depth)
>{
>	struct surface *sub;
>	int width, height;
>	
>	width = surface->width - 50;
>	height = surface->height - 50;
>
>	if (depth <= 0 || width < 50 || height < 50)
>		return;
>
>	sub = surface_create(surface->context, surface, width, height, 
>			     25, 25, (rand() & 0xffffff) | 0x8000000);
>	create_subsurfaces(sub, depth-1);
>}
>
>static void
>registry_handle_global(void *data, struct wl_registry *registry,
>		       uint32_t id, const char *interface, uint32_t version)
>{
>	struct context *ctx = data;
>
>	if (!strcmp(interface, "wl_compositor")) {
>		ctx->compositor = wl_registry_bind(registry, id,
>				&wl_compositor_interface, 1);
>	} else if (!strcmp(interface, "wl_subcompositor")) {
>		ctx->subcompositor = 
>			wl_registry_bind(registry, id,
>					 &wl_subcompositor_interface, 1);
>	} else if (!strcmp(interface, "wl_shell")) {
>		ctx->shell = 
>			wl_registry_bind(registry, id,
>					 &wl_shell_interface, 1);
>	} else if (!strcmp(interface, "wl_shm")) {
>		ctx->shm = wl_registry_bind(registry, id, &wl_shm_interface, 1);
>	}
>}
>
>static void registry_handle_global_remove(void *data, struct wl_registry *registry,
>					  uint32_t id)
>{
>}
>
>static const struct wl_registry_listener registry_listener = {
>	registry_handle_global,
>	registry_handle_global_remove
>};
>
>static struct context *
>context_init(int depth)
>{
>	struct context *ctx;
>	struct surface *root;
>
>	ctx = calloc(1, sizeof *ctx);
>	ctx->display = wl_display_connect(NULL);
>	if (!ctx->display)
>		die("failed to init wayland display");
>
>	ctx->registry = wl_display_get_registry(ctx->display);
>	wl_registry_add_listener(ctx->registry, &registry_listener, ctx);
>	wl_display_roundtrip(ctx->display);
>
>	assert(ctx->compositor != NULL);
>	assert(ctx->subcompositor != NULL);
>	assert(ctx->shell != NULL);
>
>	root = surface_create(ctx, NULL, 400, 400, 0, 0, 0xff000000);
>	if (!root)
>		die("failed to create root surface");
>
>	ctx->root_surface = root;
>
>	ctx->shell_surface = wl_shell_get_shell_surface(ctx->shell, root->surface);
>	wl_shell_surface_set_toplevel(ctx->shell_surface);
>
>	create_subsurfaces(root, depth);
>	wl_surface_commit(root->surface);
>
>	return ctx;
>}
>
>static void
>context_destroy(struct context *ctx)
>{
>	wl_display_disconnect(ctx->display);
>
>	free(ctx);
>}
>
>static void
>seed(void)
>{
>	int fd = open("/dev/urandom", O_RDONLY);
>	unsigned int s;
>
>	if (fd < 0)
>		return;
>
>	read(fd, &s, sizeof s);
>	srand(s);
>	close(fd);
>}
>
>int main(int argc, char *argv[])
>{
>	struct context *ctx;
>	int depth;
>
>	if (argc != 2)
>		printf("usage %s [depth]\n", argv[0]);
>
>	depth = atoi(argv[1]);
>	seed();
>
>	ctx = context_init(depth);
>
>	while (wl_display_dispatch(ctx->display) >= 0)
>		;
>
>	context_destroy(ctx);
>
>	return 0;
>}
>

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Attachments on bug 79684: 100467 | 100794 | 100804 | 100869 | 100977

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