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authorCampbell Barton <ideasman42@gmail.com>2012-08-26 17:41:40 +0400
committerCampbell Barton <ideasman42@gmail.com>2012-08-26 17:41:40 +0400
commitd35957ba9493dfdcc83440a968d6ceb3fcfdc645 (patch)
tree80ad2352eb1b0615377f497628024d6532e321ef /source/blender/blenkernel/intern/mask.c
parent25a925ceabb9987c0204df32200b664dcc1aaf44 (diff)
code cleanup: split out mask spline evaluation into its own file.
Diffstat (limited to 'source/blender/blenkernel/intern/mask.c')
-rw-r--r--source/blender/blenkernel/intern/mask.c602
1 files changed, 8 insertions, 594 deletions
diff --git a/source/blender/blenkernel/intern/mask.c b/source/blender/blenkernel/intern/mask.c
index a6ceba588d2..d7f6b6f6b25 100644
--- a/source/blender/blenkernel/intern/mask.c
+++ b/source/blender/blenkernel/intern/mask.c
@@ -19,7 +19,8 @@
* All rights reserved.
*
* Contributor(s): Blender Foundation,
- * Sergey Sharybin
+ * Sergey Sharybin,
+ * Campbell Barton
*
* ***** END GPL LICENSE BLOCK *****
*/
@@ -41,12 +42,8 @@
#include "DNA_mask_types.h"
#include "DNA_node_types.h"
-#include "DNA_scene_types.h"
-#include "DNA_object_types.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"
-#include "DNA_movieclip_types.h"
-#include "DNA_tracking_types.h"
#include "DNA_sequence_types.h"
#include "BKE_curve.h"
@@ -58,7 +55,6 @@
#include "BKE_sequencer.h"
#include "BKE_tracking.h"
#include "BKE_movieclip.h"
-#include "BKE_utildefines.h"
static MaskSplinePoint *mask_spline_point_next(MaskSpline *spline, MaskSplinePoint *points_array, MaskSplinePoint *point)
{
@@ -90,7 +86,7 @@ static MaskSplinePoint *mask_spline_point_prev(MaskSpline *spline, MaskSplinePoi
}
}
-static BezTriple *mask_spline_point_next_bezt(MaskSpline *spline, MaskSplinePoint *points_array, MaskSplinePoint *point)
+BezTriple *BKE_mask_spline_point_next_bezt(MaskSpline *spline, MaskSplinePoint *points_array, MaskSplinePoint *point)
{
if (point == &points_array[spline->tot_point - 1]) {
if (spline->flag & MASK_SPLINE_CYCLIC) {
@@ -269,588 +265,6 @@ MaskSpline *BKE_mask_spline_add(MaskLayer *masklay)
return spline;
}
-unsigned int BKE_mask_spline_resolution(MaskSpline *spline, int width, int height)
-{
- float max_segment = 0.01f;
- unsigned int i, resol = 1;
-
- if (width != 0 && height != 0) {
- if (width >= height)
- max_segment = 1.0f / (float) width;
- else
- max_segment = 1.0f / (float) height;
- }
-
- for (i = 0; i < spline->tot_point; i++) {
- MaskSplinePoint *point = &spline->points[i];
- BezTriple *bezt, *bezt_next;
- float a, b, c, len;
- unsigned int cur_resol;
-
- bezt = &point->bezt;
- bezt_next = mask_spline_point_next_bezt(spline, spline->points, point);
-
- if (bezt_next == NULL) {
- break;
- }
-
- a = len_v3v3(bezt->vec[1], bezt->vec[2]);
- b = len_v3v3(bezt->vec[2], bezt_next->vec[0]);
- c = len_v3v3(bezt_next->vec[0], bezt_next->vec[1]);
-
- len = a + b + c;
- cur_resol = len / max_segment;
-
- resol = MAX2(resol, cur_resol);
-
- if (resol >= MASK_RESOL_MAX) {
- break;
- }
- }
-
- return CLAMPIS(resol, 1, MASK_RESOL_MAX);
-}
-
-unsigned int BKE_mask_spline_feather_resolution(MaskSpline *spline, int width, int height)
-{
- const float max_segment = 0.005;
- unsigned int resol = BKE_mask_spline_resolution(spline, width, height);
- float max_jump = 0.0f;
- int i;
-
- /* avoid checking the featrher if we already hit the maximum value */
- if (resol >= MASK_RESOL_MAX) {
- return MASK_RESOL_MAX;
- }
-
- for (i = 0; i < spline->tot_point; i++) {
- MaskSplinePoint *point = &spline->points[i];
- float prev_u, prev_w;
- int j;
-
- prev_u = 0.0f;
- prev_w = point->bezt.weight;
-
- for (j = 0; j < point->tot_uw; j++) {
- const float w_diff = (point->uw[j].w - prev_w);
- const float u_diff = (point->uw[j].u - prev_u);
-
- /* avoid divide by zero and very high values,
- * though these get clamped eventually */
- if (u_diff > FLT_EPSILON) {
- float jump = fabsf(w_diff / u_diff);
-
- max_jump = MAX2(max_jump, jump);
- }
-
- prev_u = point->uw[j].u;
- prev_w = point->uw[j].w;
- }
- }
-
- resol += max_jump / max_segment;
-
- return CLAMPIS(resol, 1, MASK_RESOL_MAX);
-}
-
-int BKE_mask_spline_differentiate_calc_total(const MaskSpline *spline, const unsigned int resol)
-{
- if (spline->flag & MASK_SPLINE_CYCLIC) {
- return spline->tot_point * resol;
- }
- else {
- return ((spline->tot_point - 1) * resol) + 1;
- }
-}
-
-float (*BKE_mask_spline_differentiate_with_resolution_ex(MaskSpline *spline,
- int *tot_diff_point,
- const unsigned int resol
- ))[2]
-{
- MaskSplinePoint *points_array = BKE_mask_spline_point_array(spline);
-
- MaskSplinePoint *point, *prev;
- float (*diff_points)[2], (*fp)[2];
- const int tot = BKE_mask_spline_differentiate_calc_total(spline, resol);
- int a;
-
- if (spline->tot_point <= 1) {
- /* nothing to differentiate */
- *tot_diff_point = 0;
- return NULL;
- }
-
- /* len+1 because of 'forward_diff_bezier' function */
- *tot_diff_point = tot;
- diff_points = fp = MEM_mallocN((tot + 1) * sizeof(*diff_points), "mask spline vets");
-
- a = spline->tot_point - 1;
- if (spline->flag & MASK_SPLINE_CYCLIC)
- a++;
-
- prev = points_array;
- point = prev + 1;
-
- while (a--) {
- BezTriple *prevbezt;
- BezTriple *bezt;
- int j;
-
- if (a == 0 && (spline->flag & MASK_SPLINE_CYCLIC))
- point = points_array;
-
- prevbezt = &prev->bezt;
- bezt = &point->bezt;
-
- for (j = 0; j < 2; j++) {
- BKE_curve_forward_diff_bezier(prevbezt->vec[1][j], prevbezt->vec[2][j],
- bezt->vec[0][j], bezt->vec[1][j],
- &(*fp)[j], resol, 2 * sizeof(float));
- }
-
- fp += resol;
-
- if (a == 0 && (spline->flag & MASK_SPLINE_CYCLIC) == 0) {
- copy_v2_v2(*fp, bezt->vec[1]);
- }
-
- prev = point;
- point++;
- }
-
- return diff_points;
-}
-
-float (*BKE_mask_spline_differentiate_with_resolution(MaskSpline *spline, int width, int height,
- int *tot_diff_point
- ))[2]
-{
- int unsigned resol = BKE_mask_spline_resolution(spline, width, height);
-
- return BKE_mask_spline_differentiate_with_resolution_ex(spline, tot_diff_point, resol);
-}
-
-float (*BKE_mask_spline_differentiate(MaskSpline *spline, int *tot_diff_point))[2]
-{
- return BKE_mask_spline_differentiate_with_resolution(spline, 0, 0, tot_diff_point);
-}
-
-/* ** feather points self-intersection collapse routine ** */
-
-typedef struct FeatherEdgesBucket {
- int tot_segment;
- int (*segments)[2];
- int alloc_segment;
-} FeatherEdgesBucket;
-
-static void feather_bucket_add_edge(FeatherEdgesBucket *bucket, int start, int end)
-{
- const int alloc_delta = 256;
-
- if (bucket->tot_segment >= bucket->alloc_segment) {
- if (!bucket->segments) {
- bucket->segments = MEM_callocN(alloc_delta * sizeof(*bucket->segments), "feather bucket segments");
- }
- else {
- bucket->segments = MEM_reallocN(bucket->segments,
- (alloc_delta + bucket->tot_segment) * sizeof(*bucket->segments));
- }
-
- bucket->alloc_segment += alloc_delta;
- }
-
- bucket->segments[bucket->tot_segment][0] = start;
- bucket->segments[bucket->tot_segment][1] = end;
-
- bucket->tot_segment++;
-}
-
-static void feather_bucket_check_intersect(float (*feather_points)[2], int tot_feather_point, FeatherEdgesBucket *bucket,
- int cur_a, int cur_b)
-{
- int i;
-
- float *v1 = (float *) feather_points[cur_a];
- float *v2 = (float *) feather_points[cur_b];
-
- for (i = 0; i < bucket->tot_segment; i++) {
- int check_a = bucket->segments[i][0];
- int check_b = bucket->segments[i][1];
-
- float *v3 = (float *) feather_points[check_a];
- float *v4 = (float *) feather_points[check_b];
-
- if (check_a >= cur_a - 1 || cur_b == check_a)
- continue;
-
- if (isect_seg_seg_v2(v1, v2, v3, v4)) {
- int k;
- float p[2];
- float min_a[2], max_a[2];
- float min_b[2], max_b[2];
-
- isect_seg_seg_v2_point(v1, v2, v3, v4, p);
-
- INIT_MINMAX2(min_a, max_a);
- INIT_MINMAX2(min_b, max_b);
-
- /* collapse loop with smaller AABB */
- for (k = 0; k < tot_feather_point; k++) {
- if (k >= check_b && k <= cur_a) {
- DO_MINMAX2(feather_points[k], min_a, max_a);
- }
- else {
- DO_MINMAX2(feather_points[k], min_b, max_b);
- }
- }
-
- if (max_a[0] - min_a[0] < max_b[0] - min_b[0] ||
- max_a[1] - min_a[1] < max_b[1] - min_b[1])
- {
- for (k = check_b; k <= cur_a; k++) {
- copy_v2_v2(feather_points[k], p);
- }
- }
- else {
- for (k = 0; k <= check_a; k++) {
- copy_v2_v2(feather_points[k], p);
- }
-
- if (cur_b != 0) {
- for (k = cur_b; k < tot_feather_point; k++) {
- copy_v2_v2(feather_points[k], p);
- }
- }
- }
- }
- }
-}
-
-static int feather_bucket_index_from_coord(float co[2], const float min[2], const float bucket_scale[2],
- const int buckets_per_side)
-{
- int x = (int) ((co[0] - min[0]) * bucket_scale[0]);
- int y = (int) ((co[1] - min[1]) * bucket_scale[1]);
-
- if (x == buckets_per_side)
- x--;
-
- if (y == buckets_per_side)
- y--;
-
- return y * buckets_per_side + x;
-}
-
-static void feather_bucket_get_diagonal(FeatherEdgesBucket *buckets, int start_bucket_index, int end_bucket_index,
- int buckets_per_side, FeatherEdgesBucket **diagonal_bucket_a_r,
- FeatherEdgesBucket **diagonal_bucket_b_r)
-{
- int start_bucket_x = start_bucket_index % buckets_per_side;
- int start_bucket_y = start_bucket_index / buckets_per_side;
-
- int end_bucket_x = end_bucket_index % buckets_per_side;
- int end_bucket_y = end_bucket_index / buckets_per_side;
-
- int diagonal_bucket_a_index = start_bucket_y * buckets_per_side + end_bucket_x;
- int diagonal_bucket_b_index = end_bucket_y * buckets_per_side + start_bucket_x;
-
- *diagonal_bucket_a_r = &buckets[diagonal_bucket_a_index];
- *diagonal_bucket_b_r = &buckets[diagonal_bucket_b_index];
-}
-
-void BKE_mask_spline_feather_collapse_inner_loops(MaskSpline *spline, float (*feather_points)[2], const int tot_feather_point)
-{
-#define BUCKET_INDEX(co) \
- feather_bucket_index_from_coord(co, min, bucket_scale, buckets_per_side)
-
- int buckets_per_side, tot_bucket;
- float bucket_size, bucket_scale[2];
-
- FeatherEdgesBucket *buckets;
-
- int i;
- float min[2], max[2];
- float max_delta_x = -1.0f, max_delta_y = -1.0f, max_delta;
-
- if (tot_feather_point < 4) {
- /* self-intersection works only for quads at least,
- * in other cases polygon can't be self-intersecting anyway
- */
-
- return;
- }
-
- /* find min/max corners of mask to build buckets in that space */
- INIT_MINMAX2(min, max);
-
- for (i = 0; i < tot_feather_point; i++) {
- int next = i + 1;
- float delta;
-
- DO_MINMAX2(feather_points[i], min, max);
-
- if (next == tot_feather_point) {
- if (spline->flag & MASK_SPLINE_CYCLIC)
- next = 0;
- else
- break;
- }
-
- delta = fabsf(feather_points[i][0] - feather_points[next][0]);
- if (delta > max_delta_x)
- max_delta_x = delta;
-
- delta = fabsf(feather_points[i][1] - feather_points[next][1]);
- if (delta > max_delta_y)
- max_delta_y = delta;
- }
-
- /* prevent divisionsby zero by ensuring bounding box is not collapsed */
- if (max[0] - min[0] < FLT_EPSILON) {
- max[0] += 0.01f;
- min[0] -= 0.01f;
- }
-
- if (max[1] - min[1] < FLT_EPSILON) {
- max[1] += 0.01f;
- min[1] -= 0.01f;
- }
-
- /* use dynamically calculated buckets per side, so we likely wouldn't
- * run into a situation when segment doesn't fit two buckets which is
- * pain collecting candidates for intersection
- */
-
- max_delta_x /= max[0] - min[0];
- max_delta_y /= max[1] - min[1];
-
- max_delta = MAX2(max_delta_x, max_delta_y);
-
- buckets_per_side = MIN2(512, 0.9f / max_delta);
-
- if (buckets_per_side == 0) {
- /* happens when some segment fills the whole bounding box across some of dimension */
-
- buckets_per_side = 1;
- }
-
- tot_bucket = buckets_per_side * buckets_per_side;
- bucket_size = 1.0f / buckets_per_side;
-
- /* pre-compute multipliers, to save mathematical operations in loops */
- bucket_scale[0] = 1.0f / ((max[0] - min[0]) * bucket_size);
- bucket_scale[1] = 1.0f / ((max[1] - min[1]) * bucket_size);
-
- /* fill in buckets' edges */
- buckets = MEM_callocN(sizeof(FeatherEdgesBucket) * tot_bucket, "feather buckets");
-
- for (i = 0; i < tot_feather_point; i++) {
- int start = i, end = i + 1;
- int start_bucket_index, end_bucket_index;
-
- if (end == tot_feather_point) {
- if (spline->flag & MASK_SPLINE_CYCLIC)
- end = 0;
- else
- break;
- }
-
- start_bucket_index = BUCKET_INDEX(feather_points[start]);
- end_bucket_index = BUCKET_INDEX(feather_points[end]);
-
- feather_bucket_add_edge(&buckets[start_bucket_index], start, end);
-
- if (start_bucket_index != end_bucket_index) {
- FeatherEdgesBucket *end_bucket = &buckets[end_bucket_index];
- FeatherEdgesBucket *diagonal_bucket_a, *diagonal_bucket_b;
-
- feather_bucket_get_diagonal(buckets, start_bucket_index, end_bucket_index, buckets_per_side,
- &diagonal_bucket_a, &diagonal_bucket_b);
-
- feather_bucket_add_edge(end_bucket, start, end);
- feather_bucket_add_edge(diagonal_bucket_a, start, end);
- feather_bucket_add_edge(diagonal_bucket_a, start, end);
- }
- }
-
- /* check all edges for intersection with edges from their buckets */
- for (i = 0; i < tot_feather_point; i++) {
- int cur_a = i, cur_b = i + 1;
- int start_bucket_index, end_bucket_index;
-
- FeatherEdgesBucket *start_bucket;
-
- if (cur_b == tot_feather_point)
- cur_b = 0;
-
- start_bucket_index = BUCKET_INDEX(feather_points[cur_a]);
- end_bucket_index = BUCKET_INDEX(feather_points[cur_b]);
-
- start_bucket = &buckets[start_bucket_index];
-
- feather_bucket_check_intersect(feather_points, tot_feather_point, start_bucket, cur_a, cur_b);
-
- if (start_bucket_index != end_bucket_index) {
- FeatherEdgesBucket *end_bucket = &buckets[end_bucket_index];
- FeatherEdgesBucket *diagonal_bucket_a, *diagonal_bucket_b;
-
- feather_bucket_get_diagonal(buckets, start_bucket_index, end_bucket_index, buckets_per_side,
- &diagonal_bucket_a, &diagonal_bucket_b);
-
- feather_bucket_check_intersect(feather_points, tot_feather_point, end_bucket, cur_a, cur_b);
- feather_bucket_check_intersect(feather_points, tot_feather_point, diagonal_bucket_a, cur_a, cur_b);
- feather_bucket_check_intersect(feather_points, tot_feather_point, diagonal_bucket_b, cur_a, cur_b);
- }
- }
-
- /* free buckets */
- for (i = 0; i < tot_bucket; i++) {
- if (buckets[i].segments)
- MEM_freeN(buckets[i].segments);
- }
-
- MEM_freeN(buckets);
-
-#undef BUCKET_INDEX
-}
-
-/**
- * values align with #BKE_mask_spline_differentiate_with_resolution_ex
- * when \a resol arguments match.
- */
-float (*BKE_mask_spline_feather_differentiated_points_with_resolution_ex(MaskSpline *spline,
- int *tot_feather_point,
- const unsigned int resol,
- const int do_feather_isect
- ))[2]
-{
- MaskSplinePoint *points_array = BKE_mask_spline_point_array(spline);
- MaskSplinePoint *point, *prev;
- float (*feather)[2], (*fp)[2];
-
- const int tot = BKE_mask_spline_differentiate_calc_total(spline, resol);
- int a;
-
- /* tot+1 because of 'forward_diff_bezier' function */
- feather = fp = MEM_mallocN((tot + 1) * sizeof(*feather), "mask spline feather diff points");
-
- a = spline->tot_point - 1;
- if (spline->flag & MASK_SPLINE_CYCLIC)
- a++;
-
- prev = points_array;
- point = prev + 1;
-
- while (a--) {
- /* BezTriple *prevbezt; */ /* UNUSED */
- /* BezTriple *bezt; */ /* UNUSED */
- int j;
-
- if (a == 0 && (spline->flag & MASK_SPLINE_CYCLIC))
- point = points_array;
-
-
- /* prevbezt = &prev->bezt; */
- /* bezt = &point->bezt; */
-
- for (j = 0; j < resol; j++, fp++) {
- float u = (float) j / resol, weight;
- float co[2], n[2];
-
- /* TODO - these calls all calculate similar things
- * could be unified for some speed */
- BKE_mask_point_segment_co(spline, prev, u, co);
- BKE_mask_point_normal(spline, prev, u, n);
- weight = BKE_mask_point_weight(spline, prev, u);
-
- madd_v2_v2v2fl(*fp, co, n, weight);
- }
-
- if (a == 0 && (spline->flag & MASK_SPLINE_CYCLIC) == 0) {
- float u = 1.0f, weight;
- float co[2], n[2];
-
- BKE_mask_point_segment_co(spline, prev, u, co);
- BKE_mask_point_normal(spline, prev, u, n);
- weight = BKE_mask_point_weight(spline, prev, u);
-
- madd_v2_v2v2fl(*fp, co, n, weight);
- }
-
- prev = point;
- point++;
- }
-
- *tot_feather_point = tot;
-
- if ((spline->flag & MASK_SPLINE_NOINTERSECT) && do_feather_isect) {
- BKE_mask_spline_feather_collapse_inner_loops(spline, feather, tot);
- }
-
- return feather;
-}
-
-float (*BKE_mask_spline_feather_differentiated_points_with_resolution(MaskSpline *spline, int width, int height,
- int *tot_feather_point, const int do_feather_isect))[2]
-{
- unsigned int resol = BKE_mask_spline_feather_resolution(spline, width, height);
-
- return BKE_mask_spline_feather_differentiated_points_with_resolution_ex(spline, tot_feather_point, resol, do_feather_isect);
-}
-
-float (*BKE_mask_spline_feather_differentiated_points(MaskSpline *spline, int *tot_feather_point))[2]
-{
- return BKE_mask_spline_feather_differentiated_points_with_resolution(spline, 0, 0, tot_feather_point, TRUE);
-}
-
-float (*BKE_mask_spline_feather_points(MaskSpline *spline, int *tot_feather_point))[2]
-{
- MaskSplinePoint *points_array = BKE_mask_spline_point_array(spline);
-
- int i, tot = 0;
- float (*feather)[2], (*fp)[2];
-
- /* count */
- for (i = 0; i < spline->tot_point; i++) {
- MaskSplinePoint *point = &points_array[i];
-
- tot += point->tot_uw + 1;
- }
-
- /* create data */
- feather = fp = MEM_mallocN(tot * sizeof(*feather), "mask spline feather points");
-
- for (i = 0; i < spline->tot_point; i++) {
- MaskSplinePoint *point = &points_array[i];
- BezTriple *bezt = &point->bezt;
- float weight, n[2];
- int j;
-
- BKE_mask_point_normal(spline, point, 0.0f, n);
- weight = BKE_mask_point_weight(spline, point, 0.0f);
-
- madd_v2_v2v2fl(*fp, bezt->vec[1], n, weight);
- fp++;
-
- for (j = 0; j < point->tot_uw; j++) {
- float u = point->uw[j].u;
- float co[2];
-
- BKE_mask_point_segment_co(spline, point, u, co);
- BKE_mask_point_normal(spline, point, u, n);
- weight = BKE_mask_point_weight(spline, point, u);
-
- madd_v2_v2v2fl(*fp, co, n, weight);
- fp++;
- }
- }
-
- *tot_feather_point = tot;
-
- return feather;
-}
-
void BKE_mask_point_direction_switch(MaskSplinePoint *point)
{
const int tot_uw = point->tot_uw;
@@ -1111,7 +525,7 @@ float *BKE_mask_point_segment_diff_with_resolution(MaskSpline *spline, MaskSplin
int j, resol = BKE_mask_spline_resolution(spline, width, height);
bezt = &point->bezt;
- bezt_next = mask_spline_point_next_bezt(spline, points_array, point);
+ bezt_next = BKE_mask_spline_point_next_bezt(spline, points_array, point);
if (!bezt_next)
return NULL;
@@ -1143,7 +557,7 @@ void BKE_mask_point_segment_co(MaskSpline *spline, MaskSplinePoint *point, float
BezTriple *bezt = &point->bezt, *bezt_next;
float q0[2], q1[2], q2[2], r0[2], r1[2];
- bezt_next = mask_spline_point_next_bezt(spline, points_array, point);
+ bezt_next = BKE_mask_spline_point_next_bezt(spline, points_array, point);
if (!bezt_next) {
copy_v2_v2(co, bezt->vec[1]);
@@ -1167,7 +581,7 @@ void BKE_mask_point_normal(MaskSpline *spline, MaskSplinePoint *point, float u,
BezTriple *bezt = &point->bezt, *bezt_next;
float q0[2], q1[2], q2[2], r0[2], r1[2], vec[2];
- bezt_next = mask_spline_point_next_bezt(spline, points_array, point);
+ bezt_next = BKE_mask_spline_point_next_bezt(spline, points_array, point);
if (!bezt_next) {
BKE_mask_point_handle(point, vec);
@@ -1202,7 +616,7 @@ float BKE_mask_point_weight_scalar(MaskSpline *spline, MaskSplinePoint *point, c
MaskSplinePoint *points_array = BKE_mask_spline_point_array_from_point(spline, point);
BezTriple *bezt = &point->bezt, *bezt_next;
- bezt_next = mask_spline_point_next_bezt(spline, points_array, point);
+ bezt_next = BKE_mask_spline_point_next_bezt(spline, points_array, point);
if (!bezt_next) {
return bezt->weight;
@@ -1223,7 +637,7 @@ float BKE_mask_point_weight(MaskSpline *spline, MaskSplinePoint *point, const fl
MaskSplinePoint *points_array = BKE_mask_spline_point_array_from_point(spline, point);
BezTriple *bezt = &point->bezt, *bezt_next;
- bezt_next = mask_spline_point_next_bezt(spline, points_array, point);
+ bezt_next = BKE_mask_spline_point_next_bezt(spline, points_array, point);
if (!bezt_next) {
return bezt->weight;