523  * Find an idle back buffer. If there isn't one, then
536    /* Check whether we need to reuse the current back buffer as new back.  in dri3_find_back()
644    struct loader_dri3_buffer *back;  in loader_dri3_copy_sub_buffer()  local
655    back = dri3_find_back_alloc(draw);  in loader_dri3_copy_sub_buffer()
656    if (!back)  in loader_dri3_copy_sub_buffer()
662       /* Update the linear buffer part of the back buffer  in loader_dri3_copy_sub_buffer()
666                                     back->linear_buffer,  in loader_dri3_copy_sub_buffer()
667                                     back->image,  in loader_dri3_copy_sub_buffer()
668                                     0, 0, back->width, back->height,  in loader_dri3_copy_sub_buffer()
673    dri3_fence_reset(draw->conn, back);  in loader_dri3_copy_sub_buffer()
675                   back->pixmap,  in loader_dri3_copy_sub_buffer()
679    dri3_fence_trigger(draw->conn, back);  in loader_dri3_copy_sub_buffer()
686                                back->image,  in loader_dri3_copy_sub_buffer()
692                      back->pixmap,  in loader_dri3_copy_sub_buffer()
699    dri3_fence_await(draw->conn, draw, back);  in loader_dri3_copy_sub_buffer()
732     * Copy back to the tiled buffer we use for rendering.  in loader_dri3_wait_x()
792  * Make the current back buffer visible using the present extension
800    struct loader_dri3_buffer *back;  in loader_dri3_swap_buffers_msc()  local
806    back = dri3_find_back_alloc(draw);  in loader_dri3_swap_buffers_msc()
809    if (draw->is_different_gpu && back) {  in loader_dri3_swap_buffers_msc()
812                                     back->linear_buffer,  in loader_dri3_swap_buffers_msc()
813                                     back->image,  in loader_dri3_swap_buffers_msc()
814                                     0, 0, back->width, back->height,  in loader_dri3_swap_buffers_msc()
818    /* If we need to preload the new back buffer, remember the source.  in loader_dri3_swap_buffers_msc()
820     * the back buffer across a call to this function.  in loader_dri3_swap_buffers_msc()
825    /* Exchange the back and fake front. Even though the server knows about these  in loader_dri3_swap_buffers_msc()
826     * buffers, it has no notion of back and fake front.  in loader_dri3_swap_buffers_msc()
828    if (back && draw->have_fake_front) {  in loader_dri3_swap_buffers_msc()
832       draw->buffers[LOADER_DRI3_FRONT_ID] = back;  in loader_dri3_swap_buffers_msc()
841    if (back && !draw->is_pixmap) {  in loader_dri3_swap_buffers_msc()
842       dri3_fence_reset(draw->conn, back);  in loader_dri3_swap_buffers_msc()
878       /* If we need to populate the new back, but need to reuse the back  in loader_dri3_swap_buffers_msc()
885       back->busy = 1;  in loader_dri3_swap_buffers_msc()
886       back->last_swap = draw->send_sbc;  in loader_dri3_swap_buffers_msc()
889                          back->pixmap,  in loader_dri3_swap_buffers_msc()
897                          back->sync_fence,  in loader_dri3_swap_buffers_msc()
904       /* Schedule a server-side back-preserving blit if necessary.  in loader_dri3_swap_buffers_msc()
907        * b) We need to preserve the back buffer,  in loader_dri3_swap_buffers_msc()
938    struct loader_dri3_buffer *back = dri3_find_back_alloc(draw);  in loader_dri3_query_buffer_age()  local
942    ret = (!back || back->last_swap == 0) ? 0 :  in loader_dri3_query_buffer_age()
943       draw->send_sbc - back->last_swap + 1;  in loader_dri3_query_buffer_age()
1182        * Otherwise, we'll get a BadWindow error back from this request which  in dri3_update_drawable()
1385  * Find a front or back buffer, allocating new ones as necessary
1482     * a tradeoff. If we're ok with the wait we can reduce the number of back  in dri3_get_buffer()
1508  * Free the front bufffer or all of the back buffers. Used
1557    struct loader_dri3_buffer   *front, *back;  in loader_dri3_get_buffers()  local
1561    buffers->back = NULL;  in loader_dri3_get_buffers()
1564    back = NULL;  in loader_dri3_get_buffers()
1603       back = dri3_get_buffer(driDrawable,  in loader_dri3_get_buffers()
1607       if (!back)  in loader_dri3_get_buffers()
1621    if (back) {  in loader_dri3_get_buffers()
1623       buffers->back = back->image;  in loader_dri3_get_buffers()
1688  * Find a backbuffer slot - potentially allocating a back buffer
1690  * \param draw[in,out]  Pointer to the drawable for which to find back.
1691  * \return Pointer to a new back buffer or NULL if allocation failed or was
1694  * Find a potentially new back buffer, and if it's not been allocated yet and
1701    struct loader_dri3_buffer *back;  in dri3_find_back_alloc()  local
1708    back = draw->buffers[id];  in dri3_find_back_alloc()
1709    /* Allocate a new back if we haven't got one */  in dri3_find_back_alloc()
1710    if (!back && draw->back_format != __DRI_IMAGE_FORMAT_NONE &&  in dri3_find_back_alloc()
1712       back = dri3_alloc_render_buffer(draw, draw->back_format,  in dri3_find_back_alloc()
1715    if (!back)  in dri3_find_back_alloc()
1718    draw->buffers[id] = back;  in dri3_find_back_alloc()
1720    /* If necessary, prefill the back with data according to swap_method mode. */  in dri3_find_back_alloc()
1723        back != draw->buffers[draw->cur_blit_source]) {  in dri3_find_back_alloc()
1727       dri3_fence_await(draw->conn, draw, back);  in dri3_find_back_alloc()
1729                                     back->image,  in dri3_find_back_alloc()
1733       back->last_swap = source->last_swap;  in dri3_find_back_alloc()
1737    return back;  in dri3_find_back_alloc()