static void
draw_view(struct weston_view *ev, struct weston_output *output,
pixman_region32_t *damage) /* in global coordinates */
{
struct pixman_surface_state *ps = get_surface_state(ev->surface);
/* repaint bounding region in global coordinates: */
pixman_region32_t repaint;
/* non-opaque region in surface coordinates: */
pixman_region32_t surface_blend;
/* No buffer attached */
if (!ps->image)
return;
pixman_region32_init(&repaint);
pixman_region32_intersect(&repaint,
&ev->transform.boundingbox, damage);
pixman_region32_subtract(&repaint, &repaint, &ev->clip);
if (!pixman_region32_not_empty(&repaint))
goto out;
if (output->zoom.active) {
weston_log("pixman renderer does not support zoom\n");
goto out;
}
/* TODO: Implement repaint_region_complex() using pixman_composite_trapezoids() */
if (ev->transform.enabled &&
ev->transform.matrix.type != WESTON_MATRIX_TRANSFORM_TRANSLATE) {
repaint_region(ev, output, &repaint, NULL, PIXMAN_OP_OVER);
} else {
/* blended region is whole surface minus opaque region: */
pixman_region32_init_rect(&surface_blend, 0, 0,
ev->surface->width, ev->surface->height);
pixman_region32_subtract(&surface_blend, &surface_blend, &ev->surface->opaque);
if (pixman_region32_not_empty(&ev->surface->opaque)) {
repaint_region(ev, output, &repaint, &ev->surface->opaque, PIXMAN_OP_SRC);
}
if (pixman_region32_not_empty(&surface_blend)) {
repaint_region(ev, output, &repaint, &surface_blend, PIXMAN_OP_OVER);
}
pixman_region32_fini(&surface_blend);
}
out:
pixman_region32_fini(&repaint);
}
static void
draw_view_translated(struct weston_view *view, struct weston_output *output,
pixman_region32_t *repaint_global)
{
struct weston_surface *surface = view->surface;
/* non-opaque region in surface coordinates: */
pixman_region32_t surface_blend;
/* region to be painted in output coordinates: */
pixman_region32_t repaint_output;
pixman_region32_init(&repaint_output);
/* Blended region is whole surface minus opaque region,
* unless surface alpha forces us to blend all.
*/
pixman_region32_init_rect(&surface_blend, 0, 0,
surface->width, surface->height);
if (!(view->alpha < 1.0)) {
pixman_region32_subtract(&surface_blend, &surface_blend,
&surface->opaque);
if (pixman_region32_not_empty(&surface->opaque)) {
region_intersect_only_translation(&repaint_output,
repaint_global,
&surface->opaque,
view);
region_global_to_output(output, &repaint_output);
repaint_region(view, output, &repaint_output, NULL,
PIXMAN_OP_SRC);
}
}
if (pixman_region32_not_empty(&surface_blend)) {
region_intersect_only_translation(&repaint_output,
repaint_global,
&surface_blend, view);
region_global_to_output(output, &repaint_output);
repaint_region(view, output, &repaint_output, NULL,
PIXMAN_OP_OVER);
}
pixman_region32_fini(&surface_blend);
pixman_region32_fini(&repaint_output);
}
/**
* cairo_region_is_empty:
* @region: a #cairo_region_t
*
* Checks whether @region is empty.
*
* Return value: %TRUE if @region is empty, %FALSE if it isn't.
*
* Since: 1.10
**/
cairo_bool_t
cairo_region_is_empty (const cairo_region_t *region)
{
if (region->status)
return TRUE;
return ! pixman_region32_not_empty (CONST_CAST ®ion->rgn);
}
static inline pixman_bool_t
miClipPictureReg (pixman_region32_t * pRegion,
pixman_region32_t * pClip,
int dx,
int dy)
{
if (pixman_region32_n_rects(pRegion) == 1 &&
pixman_region32_n_rects(pClip) == 1)
{
pixman_box32_t * pRbox = pixman_region32_rectangles(pRegion, NULL);
pixman_box32_t * pCbox = pixman_region32_rectangles(pClip, NULL);
int v;
if (pRbox->x1 < (v = pCbox->x1 + dx))
pRbox->x1 = BOUND(v);
if (pRbox->x2 > (v = pCbox->x2 + dx))
pRbox->x2 = BOUND(v);
if (pRbox->y1 < (v = pCbox->y1 + dy))
pRbox->y1 = BOUND(v);
if (pRbox->y2 > (v = pCbox->y2 + dy))
pRbox->y2 = BOUND(v);
if (pRbox->x1 >= pRbox->x2 ||
pRbox->y1 >= pRbox->y2)
{
pixman_region32_init (pRegion);
}
}
else if (!pixman_region32_not_empty (pClip))
return FALSE;
else
{
if (dx || dy)
pixman_region32_translate (pRegion, -dx, -dy);
if (!pixman_region32_intersect (pRegion, pRegion, pClip))
return FALSE;
if (dx || dy)
pixman_region32_translate(pRegion, dx, dy);
}
return pixman_region32_not_empty(pRegion);
}
static void
draw_view(struct weston_view *ev, struct weston_output *output,
pixman_region32_t *damage) /* in global coordinates */
{
static int zoom_logged = 0;
struct pixman_surface_state *ps = get_surface_state(ev->surface);
/* repaint bounding region in global coordinates: */
pixman_region32_t repaint;
/* No buffer attached */
if (!ps->image)
return;
pixman_region32_init(&repaint);
pixman_region32_intersect(&repaint,
&ev->transform.boundingbox, damage);
pixman_region32_subtract(&repaint, &repaint, &ev->clip);
if (!pixman_region32_not_empty(&repaint))
goto out;
if (output->zoom.active && !zoom_logged) {
weston_log("pixman renderer does not support zoom\n");
zoom_logged = 1;
}
if (view_transformation_is_translation(ev)) {
/* The simple case: The surface regions opaque, non-opaque,
* etc. are convertible to global coordinate space.
* There is no need to use a source clip region.
* It is possible to paint opaque region as PIXMAN_OP_SRC.
* Also the boundingbox is accurate rather than an
* approximation.
*/
draw_view_translated(ev, output, &repaint);
} else {
/* The complex case: the view transformation does not allow
* converting opaque etc. regions into global coordinate space.
* Therefore we need source clipping to avoid sampling from
* unwanted source image areas, unless the source image is
* to be used whole. Source clipping does not work with
* PIXMAN_OP_SRC.
*/
draw_view_source_clipped(ev, output, &repaint);
}
out:
pixman_region32_fini(&repaint);
}
cairo_bool_t
_cairo_region_not_empty (cairo_region_t *region)
{
return (cairo_bool_t) pixman_region32_not_empty (®ion->rgn);
}
bool Region::isEmpty() const
{
return pixman_region32_not_empty(&m_region) ? false: true;
}