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;
}
int
loader_dri3_query_buffer_age(struct loader_dri3_drawable *draw)
{
int back_id = LOADER_DRI3_BACK_ID(dri3_find_back(draw));
if (back_id < 0 || !draw->buffers[back_id])
return 0;
if (draw->buffers[back_id]->last_swap != 0)
return draw->send_sbc - draw->buffers[back_id]->last_swap + 1;
else
return 0;
}
/** dri3_get_buffer
*
* Find a front or back buffer, allocating new ones as necessary
*/
static struct loader_dri3_buffer *
dri3_get_buffer(__DRIdrawable *driDrawable,
unsigned int format,
enum loader_dri3_buffer_type buffer_type,
struct loader_dri3_drawable *draw)
{
struct loader_dri3_buffer *buffer;
int buf_id;
__DRIcontext *dri_context;
dri_context = draw->vtable->get_dri_context(draw);
if (buffer_type == loader_dri3_buffer_back) {
buf_id = dri3_find_back(draw);
if (buf_id < 0)
return NULL;
} else {
buf_id = LOADER_DRI3_FRONT_ID;
}
buffer = draw->buffers[buf_id];
/* Allocate a new buffer if there isn't an old one, or if that
* old one is the wrong size
*/
if (!buffer || buffer->width != draw->width ||
buffer->height != draw->height) {
struct loader_dri3_buffer *new_buffer;
/* Allocate the new buffers
*/
new_buffer = dri3_alloc_render_buffer(draw,
format,
draw->width,
draw->height,
draw->depth);
if (!new_buffer)
return NULL;
/* When resizing, copy the contents of the old buffer, waiting for that
* copy to complete using our fences before proceeding
*/
switch (buffer_type) {
case loader_dri3_buffer_back:
if (buffer) {
if (!buffer->linear_buffer) {
dri3_fence_reset(draw->conn, new_buffer);
dri3_fence_await(draw->conn, buffer);
dri3_copy_area(draw->conn,
buffer->pixmap,
new_buffer->pixmap,
dri3_drawable_gc(draw),
0, 0, 0, 0,
draw->width, draw->height);
dri3_fence_trigger(draw->conn, new_buffer);
} else if (draw->vtable->in_current_context(draw)) {
draw->ext->image->blitImage(dri_context,
new_buffer->image,
buffer->image,
0, 0, draw->width, draw->height,
0, 0, draw->width, draw->height, 0);
}
dri3_free_render_buffer(draw, buffer);
}
break;
case loader_dri3_buffer_front:
dri3_fence_reset(draw->conn, new_buffer);
dri3_copy_area(draw->conn,
draw->drawable,
new_buffer->pixmap,
dri3_drawable_gc(draw),
0, 0, 0, 0,
draw->width, draw->height);
dri3_fence_trigger(draw->conn, new_buffer);
if (new_buffer->linear_buffer &&
draw->vtable->in_current_context(draw)) {
dri3_fence_await(draw->conn, new_buffer);
draw->ext->image->blitImage(dri_context,
new_buffer->image,
new_buffer->linear_buffer,
0, 0, draw->width, draw->height,
0, 0, draw->width, draw->height, 0);
}
break;
}
buffer = new_buffer;
buffer->buffer_type = buffer_type;
draw->buffers[buf_id] = buffer;
}
dri3_fence_await(draw->conn, buffer);
/* Return the requested buffer */
return buffer;
}
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;
}