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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2021 Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup edtransform
*/
#include "MEM_guardedalloc.h"
#include "DNA_space_types.h"
#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BKE_context.h"
#include "BKE_report.h"
#include "SEQ_iterator.h"
#include "SEQ_relations.h"
#include "SEQ_sequencer.h"
#include "SEQ_time.h"
#include "SEQ_transform.h"
#include "SEQ_utils.h"
#include "UI_view2d.h"
#include "transform.h"
#include "transform_convert.h"
/** Used for sequencer transform. */
typedef struct TransDataSeq {
struct Sequence *seq;
float orig_origin_position[2];
float orig_translation[2];
float orig_scale[2];
float orig_rotation;
} TransDataSeq;
static TransData *SeqToTransData(const Scene *scene,
Sequence *seq,
TransData *td,
TransData2D *td2d,
TransDataSeq *tdseq,
int vert_index)
{
const StripTransform *transform = seq->strip->transform;
float origin[2];
SEQ_image_transform_origin_offset_pixelspace_get(scene, seq, origin);
float vertex[2] = {origin[0], origin[1]};
/* Add control vertex, so rotation and scale can be calculated. */
if (vert_index == 1) {
vertex[0] += 1.0f;
}
else if (vert_index == 2) {
vertex[1] += 1.0f;
}
td2d->loc[0] = vertex[0];
td2d->loc[1] = vertex[1];
td2d->loc2d = NULL;
td->loc = td2d->loc;
copy_v3_v3(td->iloc, td->loc);
td->center[0] = origin[0];
td->center[1] = origin[1];
memset(td->axismtx, 0, sizeof(td->axismtx));
td->axismtx[2][2] = 1.0f;
unit_m3(td->mtx);
unit_m3(td->smtx);
tdseq->seq = seq;
copy_v2_v2(tdseq->orig_origin_position, origin);
tdseq->orig_translation[0] = transform->xofs;
tdseq->orig_translation[1] = transform->yofs;
tdseq->orig_scale[0] = transform->scale_x;
tdseq->orig_scale[1] = transform->scale_y;
tdseq->orig_rotation = transform->rotation;
td->extra = (void *)tdseq;
td->ext = NULL;
td->flag |= TD_SELECTED;
td->dist = 0.0;
return td;
}
static void freeSeqData(TransInfo *UNUSED(t),
TransDataContainer *tc,
TransCustomData *UNUSED(custom_data))
{
TransData *td = (TransData *)tc->data;
MEM_freeN(td->extra);
}
void createTransSeqImageData(TransInfo *t)
{
Editing *ed = SEQ_editing_get(t->scene);
if (ed == NULL) {
return;
}
ListBase *seqbase = SEQ_active_seqbase_get(ed);
SeqCollection *strips = SEQ_query_rendered_strips(seqbase, t->scene->r.cfra, 0);
SEQ_filter_selected_strips(strips);
const int count = SEQ_collection_len(strips);
if (count == 0) {
SEQ_collection_free(strips);
return;
}
TransDataContainer *tc = TRANS_DATA_CONTAINER_FIRST_SINGLE(t);
tc->custom.type.free_cb = freeSeqData;
tc->data_len = count * 3; /* 3 vertices per sequence are needed. */
TransData *td = tc->data = MEM_callocN(tc->data_len * sizeof(TransData), "TransSeq TransData");
TransData2D *td2d = tc->data_2d = MEM_callocN(tc->data_len * sizeof(TransData2D),
"TransSeq TransData2D");
TransDataSeq *tdseq = MEM_callocN(tc->data_len * sizeof(TransDataSeq), "TransSeq TransDataSeq");
Sequence *seq;
SEQ_ITERATOR_FOREACH (seq, strips) {
/* One `Sequence` needs 3 `TransData` entries - center point placed in image origin, then 2
* points offset by 1 in X and Y direction respectively, so rotation and scale can be
* calculated from these points. */
SeqToTransData(t->scene, seq, td++, td2d++, tdseq++, 0);
SeqToTransData(t->scene, seq, td++, td2d++, tdseq++, 1);
SeqToTransData(t->scene, seq, td++, td2d++, tdseq++, 2);
}
SEQ_collection_free(strips);
}
void recalcData_sequencer_image(TransInfo *t)
{
TransDataContainer *tc = TRANS_DATA_CONTAINER_FIRST_SINGLE(t);
TransData *td = NULL;
TransData2D *td2d = NULL;
int i;
for (i = 0, td = tc->data, td2d = tc->data_2d; i < tc->data_len; i++, td++, td2d++) {
/* Origin. */
float loc[2];
copy_v2_v2(loc, td2d->loc);
i++, td++, td2d++;
/* X and Y control points used to read scale and rotation. */
float handle_x[2];
copy_v2_v2(handle_x, td2d->loc);
sub_v2_v2(handle_x, loc);
i++, td++, td2d++;
float handle_y[2];
copy_v2_v2(handle_y, td2d->loc);
sub_v2_v2(handle_y, loc);
TransDataSeq *tdseq = td->extra;
Sequence *seq = tdseq->seq;
StripTransform *transform = seq->strip->transform;
float mirror[2];
SEQ_image_transform_mirror_factor_get(seq, mirror);
/* Calculate translation. */
float translation[2];
copy_v2_v2(translation, tdseq->orig_origin_position);
sub_v2_v2(translation, loc);
mul_v2_v2(translation, mirror);
transform->xofs = tdseq->orig_translation[0] - translation[0];
transform->yofs = tdseq->orig_translation[1] - translation[1];
/* Scale. */
transform->scale_x = tdseq->orig_scale[0] * fabs(len_v2(handle_x));
transform->scale_y = tdseq->orig_scale[1] * fabs(len_v2(handle_y));
/* Rotation. Scaling can cause negative rotation. */
if (t->mode == TFM_ROTATION) {
float rotation = angle_signed_v2v2(handle_x, (float[]){1, 0}) * mirror[0] * mirror[1];
transform->rotation = tdseq->orig_rotation + rotation;
transform->rotation += DEG2RAD(360.0);
transform->rotation = fmod(transform->rotation, DEG2RAD(360.0));
}
SEQ_relations_invalidate_cache_preprocessed(t->scene, seq);
}
}
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