static struct vl_dri3_buffer *
dri3_get_back_buffer(struct vl_dri3_screen *scrn)
{
struct vl_dri3_buffer *buffer;
struct pipe_resource *texture = NULL;
assert(scrn);
scrn->cur_back = dri3_find_back(scrn);
if (scrn->cur_back < 0)
return NULL;
buffer = scrn->back_buffers[scrn->cur_back];
if (!buffer || buffer->width != scrn->width ||
buffer->height != scrn->height) {
struct vl_dri3_buffer *new_buffer;
new_buffer = dri3_alloc_back_buffer(scrn);
if (!new_buffer)
return NULL;
if (buffer)
dri3_free_back_buffer(scrn, buffer);
vl_compositor_reset_dirty_area(&scrn->dirty_areas[scrn->cur_back]);
buffer = new_buffer;
scrn->back_buffers[scrn->cur_back] = buffer;
}
pipe_resource_reference(&texture, buffer->texture);
xcb_flush(scrn->conn);
xshmfence_await(buffer->shm_fence);
return buffer;
}
static VkResult
x11_acquire_next_image_poll_x11(struct x11_swapchain *chain,
uint32_t *image_index, uint64_t timeout)
{
xcb_generic_event_t *event;
struct pollfd pfds;
uint64_t atimeout;
while (1) {
for (uint32_t i = 0; i < chain->image_count; i++) {
if (!chain->images[i].busy) {
/* We found a non-busy image */
xshmfence_await(chain->images[i].shm_fence);
*image_index = i;
chain->images[i].busy = true;
return VK_SUCCESS;
}
}
xcb_flush(chain->conn);
if (timeout == UINT64_MAX) {
event = xcb_wait_for_special_event(chain->conn, chain->special_event);
if (!event)
return VK_ERROR_OUT_OF_DATE_KHR;
} else {
event = xcb_poll_for_special_event(chain->conn, chain->special_event);
if (!event) {
int ret;
if (timeout == 0)
return VK_NOT_READY;
atimeout = wsi_get_absolute_timeout(timeout);
pfds.fd = xcb_get_file_descriptor(chain->conn);
pfds.events = POLLIN;
ret = poll(&pfds, 1, timeout / 1000 / 1000);
if (ret == 0)
return VK_TIMEOUT;
if (ret == -1)
return VK_ERROR_OUT_OF_DATE_KHR;
/* If a non-special event happens, the fd will still
* poll. So recalculate the timeout now just in case.
*/
uint64_t current_time = wsi_get_current_time();
if (atimeout > current_time)
timeout = atimeout - current_time;
else
timeout = 0;
continue;
}
}
VkResult result = x11_handle_dri3_present_event(chain, (void *)event);
free(event);
if (result != VK_SUCCESS)
return result;
}
}
static VkResult
x11_acquire_next_image_from_queue(struct x11_swapchain *chain,
uint32_t *image_index_out, uint64_t timeout)
{
assert(chain->threaded);
uint32_t image_index;
VkResult result = wsi_queue_pull(&chain->acquire_queue,
&image_index, timeout);
if (result != VK_SUCCESS) {
return result;
} else if (chain->status != VK_SUCCESS) {
return chain->status;
}
assert(image_index < chain->image_count);
xshmfence_await(chain->images[image_index].shm_fence);
*image_index_out = image_index;
return VK_SUCCESS;
}
static inline void
dri3_fence_await(xcb_connection_t *c, struct loader_dri3_buffer *buffer)
{
xcb_flush(c);
xshmfence_await(buffer->shm_fence);
}
static struct vl_dri3_buffer *
dri3_get_back_buffer(struct vl_dri3_screen *scrn)
{
struct vl_dri3_buffer *buffer;
struct pipe_resource *texture = NULL;
bool allocate_new_buffer = false;
int b, id;
assert(scrn);
scrn->cur_back = dri3_find_back(scrn);
if (scrn->cur_back < 0)
return NULL;
buffer = scrn->back_buffers[scrn->cur_back];
if (scrn->output_texture) {
if (!buffer || buffer->width < scrn->width ||
buffer->height < scrn->height)
allocate_new_buffer = true;
else if (scrn->is_different_gpu)
/* In case of different gpu we can reuse the linear
* texture so we only need to set the external
* texture for copying
*/
buffer->texture = scrn->output_texture;
else {
/* In case of a single gpu we search if the texture is
* already present as buffer if not we get the
* handle and pixmap for the texture that is set
*/
for (b = 0; b < BACK_BUFFER_NUM; b++) {
id = (b + scrn->cur_back) % BACK_BUFFER_NUM;
buffer = scrn->back_buffers[id];
if (buffer && !buffer->busy &&
buffer->texture == scrn->output_texture) {
scrn->cur_back = id;
break;
}
}
if (b == BACK_BUFFER_NUM) {
allocate_new_buffer = true;
scrn->cur_back = scrn->next_back;
scrn->next_back = (scrn->next_back + 1) % BACK_BUFFER_NUM;
buffer = scrn->back_buffers[scrn->cur_back];
}
}
} else {
if (!buffer || buffer->width != scrn->width ||
buffer->height != scrn->height)
allocate_new_buffer = true;
}
if (allocate_new_buffer) {
struct vl_dri3_buffer *new_buffer;
new_buffer = dri3_alloc_back_buffer(scrn);
if (!new_buffer)
return NULL;
if (buffer)
dri3_free_back_buffer(scrn, buffer);
if (!scrn->output_texture)
vl_compositor_reset_dirty_area(&scrn->dirty_areas[scrn->cur_back]);
buffer = new_buffer;
scrn->back_buffers[scrn->cur_back] = buffer;
}
pipe_resource_reference(&texture, buffer->texture);
xcb_flush(scrn->conn);
xshmfence_await(buffer->shm_fence);
return buffer;
}
