int
pixman_image_set_clip_region (pixman_image_t *image,
pixman_region16_t *region)
{
pixman_image_destroyClip (image);
if (region) {
image->clientClip = pixman_region_create ();
pixman_region_copy (image->clientClip, region);
image->clientClipType = CT_REGION;
}
if (image->freeCompClip)
pixman_region_destroy (image->pCompositeClip);
image->pCompositeClip = pixman_region_create();
pixman_region_union_rect (image->pCompositeClip, image->pCompositeClip,
0, 0, image->pixels->width, image->pixels->height);
image->freeCompClip = 1;
if (region) {
pixman_region_translate (image->pCompositeClip,
- image->clipOrigin.x,
- image->clipOrigin.y);
pixman_region_intersect (image->pCompositeClip,
image->pCompositeClip,
region);
pixman_region_translate (image->pCompositeClip,
image->clipOrigin.x,
image->clipOrigin.y);
}
image->stateChanges |= CPClipMask;
return 0;
}
void
pixman_image_init (pixman_image_t *image)
{
image->refcnt = 1;
image->repeat = 0;
image->graphicsExposures = 0;
image->subWindowMode = ClipByChildren;
image->polyEdge = PolyEdgeSharp;
image->polyMode = PolyModePrecise;
/*
* In the server this was 0 because the composite clip list
* can be referenced from a window (and often is)
*/
image->freeCompClip = 0;
image->freeSourceClip = 0;
image->clientClipType = CT_NONE;
image->componentAlpha = 0;
image->compositeClipSource = 0;
image->alphaMap = NULL;
image->alphaOrigin.x = 0;
image->alphaOrigin.y = 0;
image->clipOrigin.x = 0;
image->clipOrigin.y = 0;
image->clientClip = NULL;
image->dither = 0L;
image->stateChanges = (1 << (CPLastBit+1)) - 1;
/* XXX: What to lodge here?
image->serialNumber = GC_CHANGE_SERIAL_BIT;
*/
image->pCompositeClip = pixman_region_create();
pixman_region_union_rect (image->pCompositeClip, image->pCompositeClip,
0, 0, image->pixels->width, image->pixels->height);
image->freeCompClip = 1;
image->pSourceClip = pixman_region_create ();
pixman_region_union_rect (image->pSourceClip, image->pSourceClip,
0, 0, image->pixels->width, image->pixels->height);
image->freeSourceClip = 1;
image->transform = NULL;
image->filter = PIXMAN_FILTER_NEAREST;
image->filter_params = NULL;
image->filter_nparams = 0;
image->owns_pixels = 0;
}
void
_cairo_clip_init_deep_copy (cairo_clip_t *clip,
cairo_clip_t *other,
cairo_surface_t *target)
{
_cairo_clip_init (clip, target);
if (other->mode != clip->mode) {
/* We should reapply the original clip path in this case, and let
* whatever the right handling is happen */
} else {
if (other->region) {
clip->region = pixman_region_create ();
pixman_region_copy (clip->region, other->region);
}
if (other->surface) {
_cairo_surface_clone_similar (target, other->surface, &clip->surface);
clip->surface_rect = other->surface_rect;
}
if (other->path) {
_cairo_clip_path_reapply_clip_path (clip, other->path);
}
}
}
/**
* _cairo_region_create_from_rectangle:
* @rect: a #cairo_rectangle_t
*
* Creates a region with extents initialized from the given
* rectangle.
*
* Return value: a newly created #pixman_region16_t or %NULL if
* memory couldn't a allocated.
**/
pixman_region16_t *
_cairo_region_create_from_rectangle (cairo_rectangle_t *rect)
{
/* We can't use pixman_region_create_simple(), because it doesn't
* have an error return
*/
pixman_region16_t *region = pixman_region_create ();
if (pixman_region_union_rect (region, region,
rect->x, rect->y,
rect->width, rect->height) != PIXMAN_REGION_STATUS_SUCCESS) {
pixman_region_destroy (region);
return NULL;
}
return region;
}
static cairo_int_status_t
_cairo_quartz_surface_set_clip_region(void *abstract_surface,
pixman_region16_t * region)
{
cairo_quartz_surface_t *surface = abstract_surface;
if (surface->clip_region)
pixman_region_destroy (surface->clip_region);
if (region) {
surface->clip_region = pixman_region_create ();
pixman_region_copy (surface->clip_region, region);
} else
surface->clip_region = NULL;
return CAIRO_STATUS_SUCCESS;
}
void
_cairo_clip_init_copy (cairo_clip_t *clip, cairo_clip_t *other)
{
clip->mode = other->mode;
clip->surface = cairo_surface_reference (other->surface);
clip->surface_rect = other->surface_rect;
clip->serial = other->serial;
if (other->region == NULL) {
clip->region = other->region;
} else {
clip->region = pixman_region_create ();
pixman_region_copy (clip->region, other->region);
}
clip->path = _cairo_clip_path_reference (other->path);
}
/**
* _cairo_traps_extract_region:
* @traps: a #cairo_traps_t
* @region: on return, %NULL is stored here if the trapezoids aren't
* exactly representable as a pixman region, otherwise a
* a pointer to such a region, newly allocated.
* (free with pixman region destroy)
*
* Determines if a set of trapezoids are exactly representable as a
* pixman region, and if so creates such a region.
*
* Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY
**/
cairo_status_t
_cairo_traps_extract_region (cairo_traps_t *traps,
pixman_region16_t **region)
{
int i;
for (i = 0; i < traps->num_traps; i++)
if (!(traps->traps[i].left.p1.x == traps->traps[i].left.p2.x
&& traps->traps[i].right.p1.x == traps->traps[i].right.p2.x
&& _cairo_fixed_is_integer(traps->traps[i].top)
&& _cairo_fixed_is_integer(traps->traps[i].bottom)
&& _cairo_fixed_is_integer(traps->traps[i].left.p1.x)
&& _cairo_fixed_is_integer(traps->traps[i].right.p1.x))) {
*region = NULL;
return CAIRO_STATUS_SUCCESS;
}
*region = pixman_region_create ();
for (i = 0; i < traps->num_traps; i++) {
int x = _cairo_fixed_integer_part(traps->traps[i].left.p1.x);
int y = _cairo_fixed_integer_part(traps->traps[i].top);
int width = _cairo_fixed_integer_part(traps->traps[i].right.p1.x) - x;
int height = _cairo_fixed_integer_part(traps->traps[i].bottom) - y;
/* XXX: Sometimes we get degenerate trapezoids from the tesellator,
* if we call pixman_region_union_rect(), it bizarrly fails on such
* an empty rectangle, so skip them.
*/
if (width == 0 || height == 0)
continue;
if (pixman_region_union_rect (*region, *region,
x, y, width, height) != PIXMAN_REGION_STATUS_SUCCESS) {
pixman_region_destroy (*region);
return CAIRO_STATUS_NO_MEMORY;
}
}
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_clip_intersect_region (cairo_clip_t *clip,
cairo_traps_t *traps,
cairo_surface_t *target)
{
pixman_region16_t *region;
cairo_status_t status;
if (clip->mode != CAIRO_CLIP_MODE_REGION)
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_traps_extract_region (traps, ®ion);
if (status)
return status;
if (region == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
status = CAIRO_STATUS_SUCCESS;
if (clip->region == NULL) {
clip->region = region;
} else {
pixman_region16_t *intersection = pixman_region_create();
if (pixman_region_intersect (intersection,
clip->region, region)
== PIXMAN_REGION_STATUS_SUCCESS) {
pixman_region_destroy (clip->region);
clip->region = intersection;
} else {
status = CAIRO_STATUS_NO_MEMORY;
}
pixman_region_destroy (region);
}
clip->serial = _cairo_surface_allocate_clip_serial (target);
return status;
}
static void
pixman_color_rects (pixman_image_t *dst,
pixman_image_t *clipPict,
pixman_color_t *color,
int nRect,
pixman_rectangle_t *rects,
int xoff,
int yoff)
{
pixman_bits_t pixel;
pixman_region16_t *clip;
pixman_region16_t *rects_as_region;
pixman_box16_t *clipped_rects;
int i, n_clipped_rects;
FillFunc func;
pixman_color_to_pixel (&dst->image_format,
color,
&pixel);
/* offset to the right place on the destination image */
xoff -= dst->pixels->x;
yoff -= dst->pixels->y;
clip = pixman_region_create();
pixman_region_union_rect (clip, clip,
dst->pixels->x, dst->pixels->y,
dst->pixels->width, dst->pixels->height);
pixman_region_intersect (clip, clip, clipPict->pCompositeClip);
if (clipPict->alphaMap)
{
pixman_region_translate (clip,
-clipPict->alphaOrigin.x,
-clipPict->alphaOrigin.y);
pixman_region_intersect (clip, clip, clipPict->alphaMap->pCompositeClip);
pixman_region_translate (clip,
clipPict->alphaOrigin.x,
clipPict->alphaOrigin.y);
}
if (xoff || yoff)
{
for (i = 0; i < nRect; i++)
{
rects[i].x -= xoff;
rects[i].y -= yoff;
}
}
rects_as_region = pixman_region_create ();
for (i = 0; i < nRect; i++)
{
pixman_region_union_rect (rects_as_region, rects_as_region,
rects[i].x, rects[i].y,
rects[i].width, rects[i].height);
}
pixman_region_intersect (rects_as_region, rects_as_region, clip);
pixman_region_destroy (clip);
n_clipped_rects = pixman_region_num_rects (rects_as_region);
clipped_rects = pixman_region_rects (rects_as_region);
if (dst->pixels->bpp == 8)
func = pixman_fill_rect_8bpp;
else if (dst->pixels->bpp == 32)
func = pixman_fill_rect_32bpp;
else if (dst->pixels->bpp == 1)
func = pixman_fill_rect_1bpp;
else
func = pixman_fill_rect_general;
for (i = 0; i < n_clipped_rects; i++) {
(*func) (dst,
clipped_rects[i].x1,
clipped_rects[i].y1,
clipped_rects[i].x2 - clipped_rects[i].x1,
clipped_rects[i].y2 - clipped_rects[i].y1,
&pixel);
}
pixman_region_destroy (rects_as_region);
if (xoff || yoff)
{
for (i = 0; i < nRect; i++)
{
rects[i].x += xoff;
rects[i].y += yoff;
}
}
}
