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vl: hide X latency by using asynchronous requests

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Signed-off-by: Christian König <deathsimple@vodafone.de>
This commit is contained in:
Christian König
2012-02-24 16:47:52 +01:00
parent 66480c0f56
commit 91ac681113
1 changed files with 37 additions and 11 deletions
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src/gallium/winsys/g3dvl/dri/dri_winsys.c
+37 -11
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@@ -50,8 +50,15 @@ struct vl_dri_screen
struct vl_screen base;
xcb_connection_t *conn;
xcb_drawable_t drawable;
bool flushed;
xcb_dri2_swap_buffers_cookie_t swap_cookie;
xcb_dri2_wait_sbc_cookie_t wait_cookie;
xcb_dri2_get_buffers_cookie_t buffers_cookie;
};
static const unsigned int attachments[1] = { XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT };
static void
vl_dri2_flush_frontbuffer(struct pipe_screen *screen,
struct pipe_resource *resource,
@@ -59,14 +66,19 @@ vl_dri2_flush_frontbuffer(struct pipe_screen *screen,
void *context_private)
{
struct vl_dri_screen *scrn = (struct vl_dri_screen*)context_private;
xcb_dri2_swap_buffers_cookie_t swap_cookie;
assert(screen);
assert(resource);
assert(context_private);
swap_cookie = xcb_dri2_swap_buffers_unchecked(scrn->conn, scrn->drawable, 0, 0, 0, 0, 0, 0);
free(xcb_dri2_swap_buffers_reply(scrn->conn, swap_cookie, NULL));
if (scrn->flushed)
free(xcb_dri2_swap_buffers_reply(scrn->conn, scrn->swap_cookie, NULL));
else
scrn->flushed = true;
scrn->swap_cookie = xcb_dri2_swap_buffers_unchecked(scrn->conn, scrn->drawable, 0, 0, 0, 0, 0, 0);
scrn->wait_cookie = xcb_dri2_wait_sbc_unchecked(scrn->conn, scrn->drawable, 0, 0);
scrn->buffers_cookie = xcb_dri2_get_buffers_unchecked(scrn->conn, scrn->drawable, 1, 1, attachments);
}
static void
@@ -83,30 +95,38 @@ vl_dri2_destroy_drawable(struct vl_dri_screen *scrn)
struct pipe_resource*
vl_screen_texture_from_drawable(struct vl_screen *vscreen, Drawable drawable)
{
static const unsigned int attachments[1] = { XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT };
struct vl_dri_screen *scrn = (struct vl_dri_screen*)vscreen;
struct winsys_handle dri2_front_handle;
struct pipe_resource template, *tex;
xcb_dri2_get_buffers_cookie_t cookie;
xcb_dri2_get_buffers_reply_t *reply;
xcb_dri2_dri2_buffer_t *buffers;
assert(scrn);
if (scrn->flushed) {
free(xcb_dri2_swap_buffers_reply(scrn->conn, scrn->swap_cookie, NULL));
free(xcb_dri2_wait_sbc_reply(scrn->conn, scrn->wait_cookie, NULL));
}
if (scrn->drawable != drawable) {
vl_dri2_destroy_drawable(scrn);
xcb_dri2_create_drawable(scrn->conn, drawable);
scrn->drawable = drawable;
} else {
xcb_dri2_wait_sbc_cookie_t wait_cookie;
wait_cookie = xcb_dri2_wait_sbc_unchecked(scrn->conn, scrn->drawable, 0, 0);
free(xcb_dri2_wait_sbc_reply(scrn->conn, wait_cookie, NULL));
if (scrn->flushed) {
free(xcb_dri2_get_buffers_reply(scrn->conn, scrn->buffers_cookie, NULL));
scrn->flushed = false;
}
}
cookie = xcb_dri2_get_buffers_unchecked(scrn->conn, drawable, 1, 1, attachments);
reply = xcb_dri2_get_buffers_reply(scrn->conn, cookie, NULL);
if (!scrn->flushed)
scrn->buffers_cookie = xcb_dri2_get_buffers_unchecked(scrn->conn, drawable, 1, 1, attachments);
else
scrn->flushed = false;
reply = xcb_dri2_get_buffers_reply(scrn->conn, scrn->buffers_cookie, NULL);
if (!reply)
return NULL;
@@ -238,6 +258,12 @@ void vl_screen_destroy(struct vl_screen *vscreen)
assert(vscreen);
if (scrn->flushed) {
free(xcb_dri2_swap_buffers_reply(scrn->conn, scrn->swap_cookie, NULL));
free(xcb_dri2_wait_sbc_reply(scrn->conn, scrn->wait_cookie, NULL));
free(xcb_dri2_get_buffers_reply(scrn->conn, scrn->buffers_cookie, NULL));
}
vl_dri2_destroy_drawable(scrn);
scrn->base.pscreen->destroy(scrn->base.pscreen);
FREE(scrn);