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pool-buffer: handle zero-sized buffers

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mako does something similar.
This commit is contained in:
Simon Ser 2021-02-10 17:41:50 +01:00
parent 235b925df7
commit 691415bf95
1 changed files with 16 additions and 14 deletions
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8
pool-buffer.c
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@ -72,18 +72,22 @@ static struct pool_buffer *create_buffer(struct wl_shm *shm,
uint32_t stride = width * 4;
size_t size = stride * height;
void *data = NULL;
if (size > 0) {
char *name;
int fd = create_pool_file(size, &name);
assert(fd != -1);
void *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
struct wl_shm_pool *pool = wl_shm_create_pool(shm, fd, size);
buf->buffer = wl_shm_pool_create_buffer(pool, 0,
width, height, stride, format);
wl_buffer_add_listener(buf->buffer, &buffer_listener, buf);
wl_shm_pool_destroy(pool);
close(fd);
unlink(name);
free(name);
fd = -1;
}
buf->size = size;
buf->width = width;
@ -92,8 +96,6 @@ static struct pool_buffer *create_buffer(struct wl_shm *shm,
buf->surface = cairo_image_surface_create_for_data(data,
CAIRO_FORMAT_ARGB32, width, height, stride);
buf->cairo = cairo_create(buf->surface);
wl_buffer_add_listener(buf->buffer, &buffer_listener, buf);
return buf;
}