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overlay: Double buffer the x11 window

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For pleasant remote transport.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2013-08-22 19:20:01 +01:00
parent b6ee8ccffe
commit 92a2f8010b
2 changed files with 35 additions and 5 deletions
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2
overlay/overlay.c
View File

@ -55,8 +55,6 @@ static void overlay_show(cairo_surface_t *surface)
{
struct overlay *overlay;
cairo_surface_flush(surface);
overlay = cairo_surface_get_user_data(surface, &overlay_key);
if (overlay == NULL)
return;

38
overlay/x11/x11-window.c
View File

@ -36,6 +36,7 @@
struct x11_window {
struct overlay base;
cairo_surface_t *front;
Display *dpy;
Window win;
int width, height;
@ -55,6 +56,15 @@ static int noop(Display *dpy, XErrorEvent *event)
static void x11_window_show(struct overlay *overlay)
{
struct x11_window *priv = to_x11_window(overlay);
cairo_t *cr;
cr = cairo_create(priv->front);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface(cr, priv->base.surface, 0, 0);
cairo_paint(cr);
cairo_destroy(cr);
cairo_surface_flush(priv->front);
if (!priv->visible) {
XMapWindow(priv->dpy, priv->win);
@ -104,11 +114,24 @@ static void x11_window_hide(struct overlay *overlay)
static void x11_window_destroy(void *data)
{
struct x11_window *priv = data;
cairo_surface_destroy(priv->front);
XDestroyWindow(priv->dpy, priv->win);
XCloseDisplay(priv->dpy);
free(priv);
}
static int prefer_image(struct config *config)
{
const char *v = config_get_value(config, "x11", "prefer-image");
if (v == NULL)
return 0;
if (*v == '\0')
return 1;
return atoi(v);
}
cairo_surface_t *
x11_window_create(struct config *config, int *width, int *height)
{
@ -148,24 +171,33 @@ x11_window_create(struct config *config, int *width, int *height)
if (priv == NULL)
goto err_surface;
priv->base.surface = surface;
if (prefer_image(config))
priv->base.surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, w, h);
else
priv->base.surface = cairo_surface_create_similar(surface, CAIRO_CONTENT_COLOR, w, h);
if (cairo_surface_status(priv->base.surface))
goto err_priv;
priv->base.show = x11_window_show;
priv->base.position = x11_window_position;
priv->base.hide = x11_window_hide;
priv->dpy = dpy;
priv->win = win;
priv->front = surface;
priv->visible = false;
priv->width = w;
priv->height = h;
cairo_surface_set_user_data(surface, &overlay_key, priv, x11_window_destroy);
cairo_surface_set_user_data(priv->base.surface, &overlay_key, priv, x11_window_destroy);
*width = w;
*height = h;
return surface;
return priv->base.surface;
err_priv:
free(priv);
err_surface:
cairo_surface_destroy(surface);
err_win: