#include "cairoint.h"
#include "cairo-clip-private.h"
static cairo_clip_path_t *
_cairo_clip_path_reference (cairo_clip_path_t *clip_path);
static void
_cairo_clip_path_destroy (cairo_clip_path_t *clip_path);
void
_cairo_clip_init (cairo_clip_t *clip, cairo_surface_t *target)
{
clip->mode = _cairo_surface_get_clip_mode (target);
clip->surface = NULL;
clip->surface_rect.x = 0;
clip->surface_rect.y = 0;
clip->surface_rect.width = 0;
clip->surface_rect.height = 0;
clip->serial = 0;
clip->region = NULL;
clip->path = NULL;
}
void
_cairo_clip_fini (cairo_clip_t *clip)
{
cairo_surface_destroy (clip->surface);
clip->surface = NULL;
clip->serial = 0;
if (clip->region)
pixman_region_destroy (clip->region);
clip->region = NULL;
_cairo_clip_path_destroy (clip->path);
clip->path = NULL;
}
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_status_t
_cairo_clip_reset (cairo_clip_t *clip)
{
cairo_surface_destroy (clip->surface);
clip->surface = NULL;
clip->serial = 0;
if (clip->region)
pixman_region_destroy (clip->region);
clip->region = NULL;
_cairo_clip_path_destroy (clip->path);
clip->path = NULL;
return CAIRO_STATUS_SUCCESS;
}
cairo_status_t
_cairo_clip_intersect_to_rectangle (cairo_clip_t *clip,
cairo_rectangle_t *rectangle)
{
if (!clip)
return CAIRO_STATUS_SUCCESS;
if (clip->path) {
}
if (clip->region) {
pixman_region16_t *intersection;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
pixman_region_status_t pixman_status;
intersection = _cairo_region_create_from_rectangle (rectangle);
if (intersection == NULL)
return CAIRO_STATUS_NO_MEMORY;
pixman_status = pixman_region_intersect (intersection,
clip->region,
intersection);
if (pixman_status == PIXMAN_REGION_STATUS_SUCCESS)
_cairo_region_extents_rectangle (intersection, rectangle);
else
status = CAIRO_STATUS_NO_MEMORY;
pixman_region_destroy (intersection);
if (status)
return status;
}
if (clip->surface)
_cairo_rectangle_intersect (rectangle, &clip->surface_rect);
return CAIRO_STATUS_SUCCESS;
}
cairo_status_t
_cairo_clip_intersect_to_region (cairo_clip_t *clip,
pixman_region16_t *region)
{
if (!clip)
return CAIRO_STATUS_SUCCESS;
if (clip->path) {
}
if (clip->region)
pixman_region_intersect (region, clip->region, region);
if (clip->surface) {
pixman_region16_t *clip_rect;
pixman_region_status_t pixman_status;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
clip_rect = _cairo_region_create_from_rectangle (&clip->surface_rect);
if (clip_rect == NULL)
return CAIRO_STATUS_NO_MEMORY;
pixman_status = pixman_region_intersect (region,
clip_rect,
region);
if (pixman_status != PIXMAN_REGION_STATUS_SUCCESS)
status = CAIRO_STATUS_NO_MEMORY;
pixman_region_destroy (clip_rect);
if (status)
return status;
}
return CAIRO_STATUS_SUCCESS;
}
cairo_status_t
_cairo_clip_combine_to_surface (cairo_clip_t *clip,
cairo_operator_t op,
cairo_surface_t *dst,
int dst_x,
int dst_y,
const cairo_rectangle_t *extents)
{
cairo_pattern_union_t pattern;
cairo_status_t status;
_cairo_pattern_init_for_surface (&pattern.surface, clip->surface);
status = _cairo_surface_composite (op,
&pattern.base,
NULL,
dst,
extents->x - clip->surface_rect.x,
extents->y - clip->surface_rect.y,
0, 0,
extents->x - dst_x,
extents->y - dst_y,
extents->width, extents->height);
_cairo_pattern_fini (&pattern.base);
return status;
}
static cairo_status_t
_cairo_clip_intersect_path (cairo_clip_t *clip,
cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
cairo_clip_path_t *clip_path;
cairo_status_t status;
if (clip->mode != CAIRO_CLIP_MODE_PATH)
return CAIRO_INT_STATUS_UNSUPPORTED;
clip_path = malloc (sizeof (cairo_clip_path_t));
if (clip_path == NULL)
return CAIRO_STATUS_NO_MEMORY;
status = _cairo_path_fixed_init_copy (&clip_path->path, path);
if (status) {
free (clip_path);
return status;
}
clip_path->ref_count = 1;
clip_path->fill_rule = fill_rule;
clip_path->tolerance = tolerance;
clip_path->antialias = antialias;
clip_path->prev = clip->path;
clip->path = clip_path;
return CAIRO_STATUS_SUCCESS;
}
static cairo_clip_path_t *
_cairo_clip_path_reference (cairo_clip_path_t *clip_path)
{
if (clip_path == NULL)
return NULL;
clip_path->ref_count++;
return clip_path;
}
static void
_cairo_clip_path_destroy (cairo_clip_path_t *clip_path)
{
if (clip_path == NULL)
return;
clip_path->ref_count--;
if (clip_path->ref_count)
return;
_cairo_path_fixed_fini (&clip_path->path);
_cairo_clip_path_destroy (clip_path->prev);
free (clip_path);
}
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 cairo_status_t
_cairo_clip_intersect_mask (cairo_clip_t *clip,
cairo_traps_t *traps,
cairo_antialias_t antialias,
cairo_surface_t *target)
{
cairo_pattern_union_t pattern;
cairo_box_t extents;
cairo_rectangle_t surface_rect, target_rect;
cairo_surface_t *surface;
cairo_status_t status;
_cairo_traps_extents (traps, &extents);
_cairo_box_round_to_rectangle (&extents, &surface_rect);
if (clip->surface != NULL)
_cairo_rectangle_intersect (&surface_rect, &clip->surface_rect);
status = _cairo_surface_get_extents (target, &target_rect);
if (!status)
_cairo_rectangle_intersect (&surface_rect, &target_rect);
surface = _cairo_surface_create_similar_solid (target,
CAIRO_CONTENT_ALPHA,
surface_rect.width,
surface_rect.height,
CAIRO_COLOR_WHITE);
if (surface->status)
return CAIRO_STATUS_NO_MEMORY;
_cairo_traps_translate (traps, -surface_rect.x, -surface_rect.y);
_cairo_pattern_init_solid (&pattern.solid, CAIRO_COLOR_WHITE);
status = _cairo_surface_composite_trapezoids (CAIRO_OPERATOR_IN,
&pattern.base,
surface,
antialias,
0, 0,
0, 0,
surface_rect.width,
surface_rect.height,
traps->traps,
traps->num_traps);
_cairo_pattern_fini (&pattern.base);
if (status) {
cairo_surface_destroy (surface);
return status;
}
if (clip->surface != NULL) {
_cairo_pattern_init_for_surface (&pattern.surface, clip->surface);
status = _cairo_surface_composite (CAIRO_OPERATOR_IN,
&pattern.base,
NULL,
surface,
surface_rect.x - clip->surface_rect.x,
surface_rect.y - clip->surface_rect.y,
0, 0,
0, 0,
surface_rect.width,
surface_rect.height);
_cairo_pattern_fini (&pattern.base);
if (status) {
cairo_surface_destroy (surface);
return status;
}
cairo_surface_destroy (clip->surface);
}
clip->surface = surface;
clip->surface_rect = surface_rect;
clip->serial = _cairo_surface_allocate_clip_serial (target);
return status;
}
cairo_status_t
_cairo_clip_clip (cairo_clip_t *clip,
cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias,
cairo_surface_t *target)
{
cairo_status_t status;
cairo_traps_t traps;
cairo_path_fixed_t path_transformed;
if (_cairo_surface_has_device_offset_or_scale (target)) {
_cairo_path_fixed_init_copy (&path_transformed, path);
_cairo_path_fixed_offset (&path_transformed,
_cairo_fixed_from_double (target->device_x_offset),
_cairo_fixed_from_double (target->device_y_offset));
path = &path_transformed;
}
status = _cairo_clip_intersect_path (clip,
path, fill_rule, tolerance,
antialias);
if (status == CAIRO_STATUS_SUCCESS)
clip->serial = _cairo_surface_allocate_clip_serial (target);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
_cairo_traps_init (&traps);
status = _cairo_path_fixed_fill_to_traps (path,
fill_rule,
tolerance,
&traps);
if (status)
goto bail;
status = _cairo_clip_intersect_region (clip, &traps, target);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
goto bail;
status = _cairo_clip_intersect_mask (clip, &traps, antialias, target);
bail:
_cairo_traps_fini (&traps);
if (path == &path_transformed)
_cairo_path_fixed_fini (&path_transformed);
return status;
}
cairo_bool_t
_cairo_clip_has_clip (cairo_clip_t *clip)
{
return clip->region != NULL || clip->surface != NULL || clip->path != NULL;
}
static cairo_bool_t
_cairo_region_to_clip_rectangles (pixman_region16_t *region,
int max_rectangles,
cairo_clip_rect_t *rectangles_out,
int *num_rectangles_out)
{
int n_boxes, i;
pixman_box16_t *boxes;
if (region == NULL)
return FALSE;
n_boxes = pixman_region_num_rects (region);
*num_rectangles_out = n_boxes;
if (n_boxes > max_rectangles)
return FALSE;
boxes = pixman_region_rects (region);
for (i = 0; i < n_boxes; i++) {
rectangles_out[i].x = boxes[i].x1;
rectangles_out[i].y = boxes[i].y1;
rectangles_out[i].width = boxes[i].x2 - boxes[i].x1;
rectangles_out[i].height = boxes[i].y2 - boxes[i].y1;
}
return TRUE;
}
cairo_bool_t
_cairo_clip_extract_rectangles (cairo_clip_t *clip,
int max_rectangles,
cairo_clip_rect_t *rectangles_out,
int *num_rectangles_out)
{
if (clip->path != NULL || clip->surface != NULL)
return FALSE;
return _cairo_region_to_clip_rectangles (clip->region,
max_rectangles, rectangles_out, num_rectangles_out);
}
void
_cairo_clip_translate (cairo_clip_t *clip,
cairo_fixed_t tx,
cairo_fixed_t ty)
{
if (clip->region) {
pixman_region_translate (clip->region,
_cairo_fixed_integer_part (tx),
_cairo_fixed_integer_part (ty));
}
if (clip->surface) {
clip->surface_rect.x += _cairo_fixed_integer_part (tx);
clip->surface_rect.y += _cairo_fixed_integer_part (ty);
}
if (clip->path) {
cairo_clip_path_t *clip_path = clip->path;
while (clip_path) {
_cairo_path_fixed_offset (&clip_path->path, tx, ty);
clip_path = clip_path->prev;
}
}
}
static void
_cairo_clip_path_reapply_clip_path (cairo_clip_t *clip,
cairo_clip_path_t *clip_path)
{
if (clip_path->prev)
_cairo_clip_path_reapply_clip_path (clip, clip_path->prev);
_cairo_clip_intersect_path (clip,
&clip_path->path,
clip_path->fill_rule,
clip_path->tolerance,
clip_path->antialias);
}
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) {
} else {
if (other->region) {
clip->region = pixman_region_create ();
pixman_region_copy (clip->region, other->region);
}
if (other->surface) {
_cairo_surface_clone_similar (target, clip->surface, &clip->surface);
clip->surface_rect = other->surface_rect;
}
if (other->path) {
_cairo_clip_path_reapply_clip_path (clip, other->path);
}
}
}