/**
* cairo_region_xor_rectangle:
* @dst: a #cairo_region_t
* @rectangle: a #cairo_rectangle_int_t
*
* Computes the exclusive difference of @dst with @rectangle and places the
* result in @dst. That is, @dst will be set to contain all areas that are
* either in @dst or in @rectangle, but not in both.
*
* Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY
*
* Since: 1.10
**/
cairo_status_t
cairo_region_xor_rectangle (cairo_region_t *dst,
const cairo_rectangle_int_t *rectangle)
{
cairo_status_t status = CAIRO_STATUS_SUCCESS;
pixman_region32_t region, tmp;
if (dst->status)
return dst->status;
pixman_region32_init_rect (®ion,
rectangle->x, rectangle->y,
rectangle->width, rectangle->height);
pixman_region32_init (&tmp);
/* XXX: get an xor function into pixman */
if (! pixman_region32_subtract (&tmp, ®ion, &dst->rgn) ||
! pixman_region32_subtract (&dst->rgn, &dst->rgn, ®ion) ||
! pixman_region32_union (&dst->rgn, &dst->rgn, &tmp))
status = _cairo_region_set_error (dst, CAIRO_STATUS_NO_MEMORY);
pixman_region32_fini (&tmp);
pixman_region32_fini (®ion);
return status;
}
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);
}
cairo_int_status_t
_cairo_region_subtract (cairo_region_t *dst, cairo_region_t *a, cairo_region_t *b)
{
if (!pixman_region32_subtract (&dst->rgn, &a->rgn, &b->rgn))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
return CAIRO_STATUS_SUCCESS;
}
static void
subtract(struct wl_client *client, struct wl_resource *resource, int32_t x, int32_t y, int32_t width, int32_t height)
{
struct region *region = wl_resource_get_user_data(resource);
pixman_region32_t operand;
pixman_region32_init_rect(&operand, x, y, width, height);
pixman_region32_subtract(®ion->region, ®ion->region, &operand);
}
/**
* cairo_region_subtract:
* @dst: a #cairo_region_t
* @other: another #cairo_region_t
*
* Subtracts @other from @dst and places the result in @dst
*
* Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY
*
* Since: 1.10
**/
cairo_status_t
cairo_region_subtract (cairo_region_t *dst, cairo_region_t *other)
{
if (dst->status)
return dst->status;
if (other->status)
return _cairo_region_set_error (dst, other->status);
if (! pixman_region32_subtract (&dst->rgn, &dst->rgn, &other->rgn))
return _cairo_region_set_error (dst, CAIRO_STATUS_NO_MEMORY);
return CAIRO_STATUS_SUCCESS;
}
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_region_xor:
* @dst: a #cairo_region_t
* @other: another #cairo_region_t
*
* Computes the exclusive difference of @dst with @other and places the
* result in @dst. That is, @dst will be set to contain all areas that
* are either in @dst or in @other, but not in both.
*
* Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY
*
* Since: 1.10
**/
cairo_status_t
cairo_region_xor (cairo_region_t *dst, const cairo_region_t *other)
{
cairo_status_t status = CAIRO_STATUS_SUCCESS;
pixman_region32_t tmp;
if (dst->status)
return dst->status;
if (other->status)
return _cairo_region_set_error (dst, other->status);
pixman_region32_init (&tmp);
/* XXX: get an xor function into pixman */
if (! pixman_region32_subtract (&tmp, CONST_CAST &other->rgn, &dst->rgn) ||
! pixman_region32_subtract (&dst->rgn, &dst->rgn, CONST_CAST &other->rgn) ||
! pixman_region32_union (&dst->rgn, &dst->rgn, &tmp))
status = _cairo_region_set_error (dst, CAIRO_STATUS_NO_MEMORY);
pixman_region32_fini (&tmp);
return status;
}
static int
headless_output_repaint(struct weston_output *output_base,
pixman_region32_t *damage)
{
struct headless_output *output = (struct headless_output *) output_base;
struct weston_compositor *ec = output->base.compositor;
ec->renderer->repaint_output(&output->base, damage);
pixman_region32_subtract(&ec->primary_plane.damage,
&ec->primary_plane.damage, damage);
wl_event_source_timer_update(output->finish_frame_timer, 16);
return 0;
}
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);
}
static void
wayland_output_repaint(struct weston_output *output_base,
pixman_region32_t *damage)
{
struct wayland_output *output = (struct wayland_output *) output_base;
struct weston_compositor *ec = output->base.compositor;
struct wl_callback *callback;
callback = wl_surface_frame(output->parent.surface);
wl_callback_add_listener(callback, &frame_listener, output);
ec->renderer->repaint_output(&output->base, damage);
pixman_region32_subtract(&ec->primary_plane.damage,
&ec->primary_plane.damage, damage);
}
/**
* cairo_region_subtract_rectangle:
* @dst: a #cairo_region_t
* @rectangle: a #cairo_rectangle_int_t
*
* Subtracts @rectangle from @dst and places the result in @dst
*
* Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY
*
* Since: 1.10
**/
cairo_status_t
cairo_region_subtract_rectangle (cairo_region_t *dst,
const cairo_rectangle_int_t *rectangle)
{
cairo_status_t status = CAIRO_STATUS_SUCCESS;
pixman_region32_t region;
if (dst->status)
return dst->status;
pixman_region32_init_rect (®ion,
rectangle->x, rectangle->y,
rectangle->width, rectangle->height);
if (! pixman_region32_subtract (&dst->rgn, &dst->rgn, ®ion))
status = _cairo_region_set_error (dst, CAIRO_STATUS_NO_MEMORY);
pixman_region32_fini (®ion);
return status;
}
int
main ()
{
pixman_region32_t r1;
pixman_region32_t r2;
pixman_region32_t r3;
pixman_box32_t boxes[] = {
{ 10, 10, 20, 20 },
{ 30, 30, 30, 40 },
{ 50, 45, 60, 44 },
};
pixman_box32_t boxes2[] = {
{ 2, 6, 7, 6 },
{ 4, 1, 6, 7 },
};
pixman_box32_t boxes3[] = {
{ 2, 6, 7, 6 },
{ 4, 1, 6, 1 },
};
int i, j;
pixman_box32_t *b;
pixman_image_t *image, *fill;
pixman_color_t white = {
0xffff,
0xffff,
0xffff,
0xffff
};
/* This used to go into an infinite loop before pixman-region.c
* was fixed to not use explict "short" variables
*/
pixman_region32_init_rect (&r1, 0, 0, 20, 64000);
pixman_region32_init_rect (&r2, 0, 0, 20, 64000);
pixman_region32_init_rect (&r3, 0, 0, 20, 64000);
pixman_region32_subtract (&r1, &r2, &r3);
/* This would produce a region containing an empty
* rectangle in it. Such regions are considered malformed,
* but using an empty rectangle for initialization should
* work.
*/
pixman_region32_init_rects (&r1, boxes, 3);
b = pixman_region32_rectangles (&r1, &i);
assert (i == 1);
while (i--)
{
assert (b[i].x1 < b[i].x2);
assert (b[i].y1 < b[i].y2);
}
/* This would produce a rectangle containing the bounding box
* of the two rectangles. The correct result is to eliminate
* the broken rectangle.
*/
pixman_region32_init_rects (&r1, boxes2, 2);
b = pixman_region32_rectangles (&r1, &i);
assert (i == 1);
assert (b[0].x1 == 4);
assert (b[0].y1 == 1);
assert (b[0].x2 == 6);
assert (b[0].y2 == 7);
/* This should produce an empty region */
pixman_region32_init_rects (&r1, boxes3, 2);
b = pixman_region32_rectangles (&r1, &i);
assert (i == 0);
fill = pixman_image_create_solid_fill (&white);
for (i = 0; i < 100; i++)
{
int image_size = 128;
pixman_region32_init (&r1);
/* Add some random rectangles */
for (j = 0; j < 64; j++)
pixman_region32_union_rect (&r1, &r1,
lcg_rand_n (image_size),
lcg_rand_n (image_size),
lcg_rand_n (25),
lcg_rand_n (25));
/* Clip to image size */
pixman_region32_init_rect (&r2, 0, 0, image_size, image_size);
pixman_region32_intersect (&r1, &r1, &r2);
pixman_region32_fini (&r2);
/* render region to a1 mask */
image = pixman_image_create_bits (PIXMAN_a1, image_size, image_size, NULL, 0);
pixman_image_set_clip_region32 (image, &r1);
pixman_image_composite32 (PIXMAN_OP_SRC,
fill, NULL, image,
0, 0, 0, 0, 0, 0,
image_size, image_size);
pixman_region32_init_from_image (&r2, image);
pixman_image_unref (image);
assert (pixman_region32_equal (&r1, &r2));
pixman_region32_fini (&r1);
pixman_region32_fini (&r2);
}
pixman_image_unref (fill);
return 0;
}
int
main ()
{
pixman_region32_t r1;
pixman_region32_t r2;
pixman_region32_t r3;
pixman_box32_t boxes[] = {
{ 10, 10, 20, 20 },
{ 30, 30, 30, 40 },
{ 50, 45, 60, 44 },
};
pixman_box32_t boxes2[] = {
{ 2, 6, 7, 6 },
{ 4, 1, 6, 7 },
};
pixman_box32_t boxes3[] = {
{ 2, 6, 7, 6 },
{ 4, 1, 6, 1 },
};
int i;
pixman_box32_t *b;
/* This used to go into an infinite loop before pixman-region.c
* was fixed to not use explict "short" variables
*/
pixman_region32_init_rect (&r1, 0, 0, 20, 64000);
pixman_region32_init_rect (&r2, 0, 0, 20, 64000);
pixman_region32_init_rect (&r3, 0, 0, 20, 64000);
pixman_region32_subtract (&r1, &r2, &r3);
/* This would produce a region containing an empty
* rectangle in it. Such regions are considered malformed,
* but using an empty rectangle for initialization should
* work.
*/
pixman_region32_init_rects (&r1, boxes, 3);
b = pixman_region32_rectangles (&r1, &i);
assert (i == 1);
while (i--)
{
assert (b[i].x1 < b[i].x2);
assert (b[i].y1 < b[i].y2);
}
/* This would produce a rectangle containing the bounding box
* of the two rectangles. The correct result is to eliminate
* the broken rectangle.
*/
pixman_region32_init_rects (&r1, boxes2, 2);
b = pixman_region32_rectangles (&r1, &i);
assert (i == 1);
assert (b[0].x1 == 4);
assert (b[0].y1 == 1);
assert (b[0].x2 == 6);
assert (b[0].y2 == 7);
/* This should produce an empty region */
pixman_region32_init_rects (&r1, boxes3, 2);
b = pixman_region32_rectangles (&r1, &i);
assert (i == 0);
return 0;
}
Region& Region::createSubtraction(const Region& a, const Region& b)
{
pixman_region32_subtract(&m_region, &a.m_region, &b.m_region);
return *this;
}
