// position pointer in file, position in second
AVFrame *VideoFFmpeg::grabFrame(long position)
{
	AVPacket packet;
	int frameFinished;
	int posFound = 1;
	bool frameLoaded = false;
	int64_t targetTs = 0;
	CacheFrame *frame;
	int64_t dts = 0;

	if (m_cacheStarted)
	{
		// when cache is active, we must not read the file directly
		do {
			pthread_mutex_lock(&m_cacheMutex);
			frame = (CacheFrame *)m_frameCacheBase.first;
			pthread_mutex_unlock(&m_cacheMutex);
			// no need to remove the frame from the queue: the cache thread does not touch the head, only the tail
			if (frame == NULL)
			{
				// no frame in cache, in case of file it is an abnormal situation
				if (m_isFile)
				{
					// go back to no threaded reading
					stopCache();
					break;
				}
				return NULL;
			}
			if (frame->framePosition == -1) 
			{
				// this frame mark the end of the file (only used for file)
				// leave in cache to make sure we don't miss it
				m_eof = true;
				return NULL;
			}
			// for streaming, always return the next frame, 
			// that's what grabFrame does in non cache mode anyway.
			if (m_isStreaming || frame->framePosition == position)
			{
				return frame->frame;
			}
			// for cam, skip old frames to keep image realtime.
			// There should be no risk of clock drift since it all happens on the same CPU
			if (frame->framePosition > position) 
			{
				// this can happen after rewind if the seek didn't find the first frame
				// the frame in the buffer is ahead of time, just leave it there
				return NULL;
			}
			// this frame is not useful, release it
			pthread_mutex_lock(&m_cacheMutex);
			BLI_remlink(&m_frameCacheBase, frame);
			BLI_addtail(&m_frameCacheFree, frame);
			pthread_mutex_unlock(&m_cacheMutex);
		} while (true);
	}
	double timeBase = av_q2d(m_formatCtx->streams[m_videoStream]->time_base);
	int64_t startTs = m_formatCtx->streams[m_videoStream]->start_time;
	if (startTs == AV_NOPTS_VALUE)
		startTs = 0;

	// come here when there is no cache or cache has been stopped
	// locate the frame, by seeking if necessary (seeking is only possible for files)
	if (m_isFile)
	{
		// first check if the position that we are looking for is in the preseek range
		// if so, just read the frame until we get there
		if (position > m_curPosition + 1 
			&& m_preseek 
			&& position - (m_curPosition + 1) < m_preseek) 
		{
			while (av_read_frame(m_formatCtx, &packet)>=0)
			{
				if (packet.stream_index == m_videoStream) 
				{
					avcodec_decode_video2(
						m_codecCtx, 
						m_frame, &frameFinished, 
						&packet);
					if (frameFinished)
					{
						m_curPosition = (long)((packet.dts-startTs) * (m_baseFrameRate*timeBase) + 0.5);
					}
				}
				av_free_packet(&packet);
				if (position == m_curPosition+1)
					break;
			}
		}
		// if the position is not in preseek, do a direct jump
		if (position != m_curPosition + 1) 
		{ 
			int64_t pos = (int64_t)((position - m_preseek) / (m_baseFrameRate*timeBase));

			if (pos < 0)
				pos = 0;

			pos += startTs;
//.........这里部分代码省略.........

static void init_iconfile_list(struct ListBase *list)
{
	IconFile *ifile;
	struct direntry *dir;
	int totfile, i, index = 1;
	const char *icondir;

	BLI_listbase_clear(list);
	icondir = BLI_get_folder(BLENDER_DATAFILES, "icons");

	if (icondir == NULL)
		return;
	
	totfile = BLI_dir_contents(icondir, &dir);

	for (i = 0; i < totfile; i++) {
		if ((dir[i].type & S_IFREG)) {
			const char *filename = dir[i].relname;
			
			if (BLI_testextensie(filename, ".png")) {
				/* loading all icons on file start is overkill & slows startup
				 * its possible they change size after blender load anyway. */
#if 0
				int ifilex, ifiley;
				char iconfilestr[FILE_MAX + 16]; /* allow 256 chars for file+dir */
				ImBuf *bbuf = NULL;
				/* check to see if the image is the right size, continue if not */
				/* copying strings here should go ok, assuming that we never get back
				 * a complete path to file longer than 256 chars */
				BLI_join_dirfile(iconfilestr, sizeof(iconfilestr), icondir, filename);
				bbuf = IMB_loadiffname(iconfilestr, IB_rect);

				if (bbuf) {
					ifilex = bbuf->x;
					ifiley = bbuf->y;
					IMB_freeImBuf(bbuf);
				}
				else {
					ifilex = ifiley = 0;
				}
				
				/* bad size or failed to load */
				if ((ifilex != ICON_IMAGE_W) || (ifiley != ICON_IMAGE_H)) {
					printf("icon '%s' is wrong size %dx%d\n", iconfilestr, ifilex, ifiley);
					continue;
				}
#endif          /* removed */

				/* found a potential icon file, so make an entry for it in the cache list */
				ifile = MEM_callocN(sizeof(IconFile), "IconFile");
				
				BLI_strncpy(ifile->filename, filename, sizeof(ifile->filename));
				ifile->index = index;

				BLI_addtail(list, ifile);
				
				index++;
			}
		}
	}

	BLI_free_filelist(dir, totfile);
	dir = NULL;
}

//.........这里部分代码省略.........
					do_extrude = 2;
				}
			}
			
			if (do_extrude) {
				/* we re-use code for mirror editing... */
				flipbone = NULL;
				if (arm->flag & ARM_MIRROR_EDIT) {
					flipbone = ED_armature_bone_get_mirrored(arm->edbo, ebone);
					if (flipbone) {
						forked = 0;  // we extrude 2 different bones
						if (flipbone->flag & (BONE_TIPSEL | BONE_ROOTSEL | BONE_SELECTED))
							/* don't want this bone to be selected... */
							flipbone->flag &= ~(BONE_TIPSEL | BONE_SELECTED | BONE_ROOTSEL);
					}
					if ((flipbone == NULL) && (forked))
						flipbone = ebone;
				}
				
				for (a = 0; a < 2; a++) {
					if (a == 1) {
						if (flipbone == NULL)
							break;
						else {
							SWAP(EditBone *, flipbone, ebone);
						}
					}
					
					totbone++;
					newbone = MEM_callocN(sizeof(EditBone), "extrudebone");
					
					if (do_extrude == true) {
						copy_v3_v3(newbone->head, ebone->tail);
						copy_v3_v3(newbone->tail, newbone->head);
						newbone->parent = ebone;
						
						newbone->flag = ebone->flag & (BONE_TIPSEL | BONE_RELATIVE_PARENTING);  // copies it, in case mirrored bone
						
						if (newbone->parent) newbone->flag |= BONE_CONNECTED;
					}
					else {
						copy_v3_v3(newbone->head, ebone->head);
						copy_v3_v3(newbone->tail, ebone->head);
						newbone->parent = ebone->parent;
						
						newbone->flag = BONE_TIPSEL;
						
						if (newbone->parent && (ebone->flag & BONE_CONNECTED)) {
							newbone->flag |= BONE_CONNECTED;
						}
					}
					
					newbone->weight = ebone->weight;
					newbone->dist = ebone->dist;
					newbone->xwidth = ebone->xwidth;
					newbone->zwidth = ebone->zwidth;
					newbone->ease1 = ebone->ease1;
					newbone->ease2 = ebone->ease2;
					newbone->rad_head = ebone->rad_tail; // don't copy entire bone...
					newbone->rad_tail = ebone->rad_tail;
					newbone->segments = 1;
					newbone->layer = ebone->layer;
					
					BLI_strncpy(newbone->name, ebone->name, sizeof(newbone->name));
					
					if (flipbone && forked) {   // only set if mirror edit
						if (strlen(newbone->name) < (MAXBONENAME - 2)) {
							if (a == 0) strcat(newbone->name, "_L");
							else strcat(newbone->name, "_R");
						}
					}
					unique_editbone_name(arm->edbo, newbone->name, NULL);
					
					/* Add the new bone to the list */
					BLI_addtail(arm->edbo, newbone);
					if (!first)
						first = newbone;
					
					/* restore ebone if we were flipping */
					if (a == 1 && flipbone)
						SWAP(EditBone *, flipbone, ebone);
				}
			}
			
			/* Deselect the old bone */
			ebone->flag &= ~(BONE_TIPSEL | BONE_SELECTED | BONE_ROOTSEL);
		}
	}
	/* if only one bone, make this one active */
	if (totbone == 1 && first) arm->act_edbone = first;

	if (totbone == 0) return OPERATOR_CANCELLED;

	/* Transform the endpoints */
	ED_armature_sync_selection(arm->edbo);

	WM_event_add_notifier(C, NC_OBJECT | ND_BONE_SELECT, obedit);

	return OPERATOR_FINISHED;
}

/* Make copies of selected point segments in a selected stroke */
static void gp_duplicate_points(const bGPDstroke *gps, ListBase *new_strokes)
{
	bGPDspoint *pt;
	int i;
	
	int start_idx = -1;
	
	
	/* Step through the original stroke's points:
	 * - We accumulate selected points (from start_idx to current index)
	 *   and then convert that to a new stroke
	 */
	for (i = 0, pt = gps->points; i < gps->totpoints; i++, pt++) {
		/* searching for start, are waiting for end? */
		if (start_idx == -1) {
			/* is this the first selected point for a new island? */
			if (pt->flag & GP_SPOINT_SELECT) {
				start_idx = i;
			}
		}
		else {
			size_t len = 0;
			
			/* is this the end of current island yet?
			 * 1) Point i-1 was the last one that was selected
			 * 2) Point i is the last in the array
			 */
			if ((pt->flag & GP_SPOINT_SELECT) == 0) {
				len = i - start_idx;
			}
			else if (i == gps->totpoints - 1) {
				len = i - start_idx + 1;
			}
			//printf("copying from %d to %d = %d\n", start_idx, i, len);
		
			/* make copies of the relevant data */
			if (len) {
				bGPDstroke *gpsd;
				
				/* make a stupid copy first of the entire stroke (to get the flags too) */
				gpsd = MEM_dupallocN(gps);
				
				/* initialize triangle memory - will be calculated on next redraw */
				gpsd->triangles = NULL;
				gpsd->flag |= GP_STROKE_RECALC_CACHES;
				gpsd->tot_triangles = 0;
				
				/* now, make a new points array, and copy of the relevant parts */
				gpsd->points = MEM_callocN(sizeof(bGPDspoint) * len, "gps stroke points copy");
				memcpy(gpsd->points, gps->points + start_idx, sizeof(bGPDspoint) * len);
				gpsd->totpoints = len;
				
				/* add to temp buffer */
				gpsd->next = gpsd->prev = NULL;
				BLI_addtail(new_strokes, gpsd);
				
				/* cleanup + reset for next */
				start_idx = -1;
			}
		}
	}
}

static void time_draw_cache(SpaceTime *stime, Object *ob, Scene *scene)
{
	PTCacheID *pid;
	ListBase pidlist;
	SpaceTimeCache *stc = stime->caches.first;
	const float cache_draw_height = (4.0f * UI_DPI_FAC * U.pixelsize);
	float yoffs = 0.f;
	
	if (!(stime->cache_display & TIME_CACHE_DISPLAY) || (!ob))
		return;

	BKE_ptcache_ids_from_object(&pidlist, ob, scene, 0);

	/* iterate over pointcaches on the active object, 
	 * add spacetimecache and vertex array for each */
	for (pid = pidlist.first; pid; pid = pid->next) {
		float col[4], *fp;
		int i, sta = pid->cache->startframe, end = pid->cache->endframe;
		int len = (end - sta + 1) * 4;

		switch (pid->type) {
			case PTCACHE_TYPE_SOFTBODY:
				if (!(stime->cache_display & TIME_CACHE_SOFTBODY)) continue;
				break;
			case PTCACHE_TYPE_PARTICLES:
				if (!(stime->cache_display & TIME_CACHE_PARTICLES)) continue;
				break;
			case PTCACHE_TYPE_CLOTH:
				if (!(stime->cache_display & TIME_CACHE_CLOTH)) continue;
				break;
			case PTCACHE_TYPE_SMOKE_DOMAIN:
			case PTCACHE_TYPE_SMOKE_HIGHRES:
				if (!(stime->cache_display & TIME_CACHE_SMOKE)) continue;
				break;
			case PTCACHE_TYPE_DYNAMICPAINT:
				if (!(stime->cache_display & TIME_CACHE_DYNAMICPAINT)) continue;
				break;
			case PTCACHE_TYPE_RIGIDBODY:
				if (!(stime->cache_display & TIME_CACHE_RIGIDBODY)) continue;
				break;
		}

		if (pid->cache->cached_frames == NULL)
			continue;

		/* make sure we have stc with correct array length */
		if (stc == NULL || MEM_allocN_len(stc->array) != len * 2 * sizeof(float)) {
			if (stc) {
				MEM_freeN(stc->array);
			}
			else {
				stc = MEM_callocN(sizeof(SpaceTimeCache), "spacetimecache");
				BLI_addtail(&stime->caches, stc);
			}

			stc->array = MEM_callocN(len * 2 * sizeof(float), "SpaceTimeCache array");
		}

		/* fill the vertex array with a quad for each cached frame */
		for (i = sta, fp = stc->array; i <= end; i++) {
			if (pid->cache->cached_frames[i - sta]) {
				fp[0] = (float)i - 0.5f;
				fp[1] = 0.0;
				fp += 2;
				
				fp[0] = (float)i - 0.5f;
				fp[1] = 1.0;
				fp += 2;
				
				fp[0] = (float)i + 0.5f;
				fp[1] = 1.0;
				fp += 2;
				
				fp[0] = (float)i + 0.5f;
				fp[1] = 0.0;
				fp += 2;
			}
		}
		
		glPushMatrix();
		glTranslatef(0.0, (float)V2D_SCROLL_HEIGHT + yoffs, 0.0);
		glScalef(1.0, cache_draw_height, 0.0);
		
		switch (pid->type) {
			case PTCACHE_TYPE_SOFTBODY:
				col[0] = 1.0;   col[1] = 0.4;   col[2] = 0.02;
				col[3] = 0.1;
				break;
			case PTCACHE_TYPE_PARTICLES:
				col[0] = 1.0;   col[1] = 0.1;   col[2] = 0.02;
				col[3] = 0.1;
				break;
			case PTCACHE_TYPE_CLOTH:
				col[0] = 0.1;   col[1] = 0.1;   col[2] = 0.75;
				col[3] = 0.1;
				break;
			case PTCACHE_TYPE_SMOKE_DOMAIN:
			case PTCACHE_TYPE_SMOKE_HIGHRES:
				col[0] = 0.2;   col[1] = 0.2;   col[2] = 0.2;
				col[3] = 0.1;
//.........这里部分代码省略.........

/* Selects all visible keyframes in the same frames as the specified elements */
static void columnselect_action_keys(bAnimContext *ac, short mode)
{
	ListBase anim_data = {NULL, NULL};
	bAnimListElem *ale;
	int filter;
	
	Scene *scene = ac->scene;
	CfraElem *ce;
	KeyframeEditFunc select_cb, ok_cb;
	KeyframeEditData ked = {{NULL}};
	
	/* initialize keyframe editing data */
	
	/* build list of columns */
	switch (mode) {
		case ACTKEYS_COLUMNSEL_KEYS: /* list of selected keys */
			if (ac->datatype == ANIMCONT_GPENCIL) {
				filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_LIST_VISIBLE);
				ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype);
				
				for (ale = anim_data.first; ale; ale = ale->next)
					ED_gplayer_make_cfra_list(ale->data, &ked.list, 1);
			}
			else {
				filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_LIST_VISIBLE /*| ANIMFILTER_CURVESONLY*/);
				ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype);
				
				for (ale = anim_data.first; ale; ale = ale->next)
					ANIM_fcurve_keyframes_loop(&ked, ale->key_data, NULL, bezt_to_cfraelem, NULL);
			}
			ANIM_animdata_freelist(&anim_data);
			break;
			
		case ACTKEYS_COLUMNSEL_CFRA: /* current frame */
			/* make a single CfraElem for storing this */
			ce = MEM_callocN(sizeof(CfraElem), "cfraElem");
			BLI_addtail(&ked.list, ce);
			
			ce->cfra = (float)CFRA;
			break;
			
		case ACTKEYS_COLUMNSEL_MARKERS_COLUMN: /* list of selected markers */
			ED_markers_make_cfra_list(ac->markers, &ked.list, SELECT);
			break;
			
		default: /* invalid option */
			return;
	}
	
	/* set up BezTriple edit callbacks */
	select_cb = ANIM_editkeyframes_select(SELECT_ADD);
	ok_cb = ANIM_editkeyframes_ok(BEZT_OK_FRAME);
	
	/* loop through all of the keys and select additional keyframes
	 * based on the keys found to be selected above
	 */
	if (ELEM(ac->datatype, ANIMCONT_GPENCIL, ANIMCONT_MASK))
		filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_LIST_VISIBLE);
	else
		filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_LIST_VISIBLE /*| ANIMFILTER_CURVESONLY*/);
	ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype);
	
	for (ale = anim_data.first; ale; ale = ale->next) {
		AnimData *adt = ANIM_nla_mapping_get(ac, ale);
		
		/* loop over cfraelems (stored in the KeyframeEditData->list)
		 *	- we need to do this here, as we can apply fewer NLA-mapping conversions
		 */
		for (ce = ked.list.first; ce; ce = ce->next) {
			/* set frame for validation callback to refer to */
			if (adt)
				ked.f1 = BKE_nla_tweakedit_remap(adt, ce->cfra, NLATIME_CONVERT_UNMAP);
			else
				ked.f1 = ce->cfra;
			
			/* select elements with frame number matching cfraelem */
			if (ale->type == ANIMTYPE_GPLAYER)
				ED_gpencil_select_frame(ale->data, ce->cfra, SELECT_ADD);
			else if (ale->type == ANIMTYPE_MASKLAYER)
				ED_mask_select_frame(ale->data, ce->cfra, SELECT_ADD);
			else
				ANIM_fcurve_keyframes_loop(&ked, ale->key_data, ok_cb, select_cb, NULL);
		}
	}
	
	/* free elements */
	BLI_freelistN(&ked.list);
	ANIM_animdata_freelist(&anim_data);
}

//.........这里部分代码省略.........
	
	/* filter data */
	filter= (ACTFILTER_VISIBLE | ACTFILTER_SEL | ACTFILTER_FOREDIT);
	actdata_filter(&act_data, filter, data, datatype);
	
	/* from selected channels */
	for (ale= act_data.first; ale; ale= ale->next) {
		bGPDlayer *gpld= (bGPDlayer *)ale->data;
		bGPDlayer *gpls= NULL;
		bGPDframe *gpfs, *gpf;
		
		/* find suitable layer from buffer to use to paste from */
		for (gpls= gpcopybuf.first; gpls; gpls= gpls->next) {
			/* check if layer name matches */
			if ((no_name) || (strcmp(gpls->info, gpld->info)==0))
				break;
		}
		
		/* this situation might occur! */
		if (gpls == NULL)
			continue;
		
		/* add frames from buffer */
		for (gpfs= gpls->frames.first; gpfs; gpfs= gpfs->next) {
			/* temporarily apply offset to buffer-frame while copying */
			gpfs->framenum += offset;
			
			/* get frame to copy data into (if no frame returned, then just ignore) */
			gpf= gpencil_layer_getframe(gpld, gpfs->framenum, 1);
			if (gpf) {
				bGPDstroke *gps, *gpsn;
				ScrArea *sa;
				
				/* get area that gp-data comes from */
				//sa= gpencil_data_findowner((bGPdata *)ale->owner);	
				sa = NULL;
				
				/* this should be the right frame... as it may be a pre-existing frame, 
				 * must make sure that only compatible stroke types get copied over 
				 *	- we cannot just add a duplicate frame, as that would cause errors
				 *	- need to check for compatible types to minimise memory usage (copying 'junk' over)
				 */
				for (gps= gpfs->strokes.first; gps; gps= gps->next) {
					short stroke_ok;
					
					/* if there's an area, check that it supports this type of stroke */
					if (sa) {
						stroke_ok= 0;
						
						/* check if spacetype supports this type of stroke
						 *	- NOTE: must sync this with gp_paint_initstroke() in gpencil.c
						 */
						switch (sa->spacetype) {
							case SPACE_VIEW3D: /* 3D-View: either screen-aligned or 3d-space */
								if ((gps->flag == 0) || (gps->flag & GP_STROKE_3DSPACE))
									stroke_ok= 1;
								break;
								
							case SPACE_NODE: /* Nodes Editor: either screen-aligned or view-aligned */
							case SPACE_IMAGE: /* Image Editor: either screen-aligned or view\image-aligned */
								if ((gps->flag == 0) || (gps->flag & GP_STROKE_2DSPACE))
									stroke_ok= 1;
								break;
								
							case SPACE_SEQ: /* Sequence Editor: either screen-aligned or view-aligned */
								if ((gps->flag == 0) || (gps->flag & GP_STROKE_2DIMAGE))
									stroke_ok= 1;
								break;
						}
					}
					else
						stroke_ok= 1;
					
					/* if stroke is ok, we make a copy of this stroke and add to frame */
					if (stroke_ok) {
						/* make a copy of stroke, then of its points array */
						gpsn= MEM_dupallocN(gps);
						gpsn->points= MEM_dupallocN(gps->points);
						
						/* append stroke to frame */
						BLI_addtail(&gpf->strokes, gpsn);
					}
				}
				
				/* if no strokes (i.e. new frame) added, free gpf */
				if (gpf->strokes.first == NULL)
					gpencil_layer_delframe(gpld, gpf);
			}
			
			/* unapply offset from buffer-frame */
			gpfs->framenum -= offset;
		}
	}
	
	/* free temp memory */
	BLI_freelistN(&act_data);
	
	/* undo and redraw stuff */
	BIF_undo_push("Paste Grease Pencil Frames");
}

static int curvesurf_prim_add(bContext *C, wmOperator *op, int type, int isSurf)
{
	Object *obedit = CTX_data_edit_object(C);
	ListBase *editnurb;
	Nurb *nu;
	bool newob = false;
	bool enter_editmode;
	unsigned int layer;
	float dia;
	float loc[3], rot[3];
	float mat[4][4];

	WM_operator_view3d_unit_defaults(C, op);

	if (!ED_object_add_generic_get_opts(C, op, 'Z', loc, rot, &enter_editmode, &layer, NULL))
		return OPERATOR_CANCELLED;

	if (!isSurf) { /* adding curve */
		if (obedit == NULL || obedit->type != OB_CURVE) {
			Curve *cu;

			obedit = ED_object_add_type(C, OB_CURVE, loc, rot, true, layer);
			newob = true;

			cu = (Curve *)obedit->data;
			cu->flag |= CU_DEFORM_FILL;

			if (type & CU_PRIM_PATH)
				cu->flag |= CU_PATH | CU_3D;
		}
		else {
			DAG_id_tag_update(&obedit->id, OB_RECALC_DATA);
		}
	}
	else { /* adding surface */
		if (obedit == NULL || obedit->type != OB_SURF) {
			obedit = ED_object_add_type(C, OB_SURF, loc, rot, true, layer);
			newob = true;
		}
		else {
			DAG_id_tag_update(&obedit->id, OB_RECALC_DATA);
		}
	}

	/* rename here, the undo stack checks name for valid undo pushes */
	if (newob) {
		if (obedit->type == OB_CURVE) {
			rename_id((ID *)obedit, get_curve_defname(type));
			rename_id((ID *)obedit->data, get_curve_defname(type));
		}
		else {
			rename_id((ID *)obedit, get_surf_defname(type));
			rename_id((ID *)obedit->data, get_surf_defname(type));
		}
	}

	/* ED_object_add_type doesnt do an undo, is needed for redo operator on primitive */
	if (newob && enter_editmode)
		ED_undo_push(C, "Enter Editmode");

	ED_object_new_primitive_matrix(C, obedit, loc, rot, mat);
	dia = RNA_float_get(op->ptr, "radius");
	mul_mat3_m4_fl(mat, dia);

	nu = add_nurbs_primitive(C, obedit, mat, type, newob);
	editnurb = object_editcurve_get(obedit);
	BLI_addtail(editnurb, nu);

	/* userdef */
	if (newob && !enter_editmode) {
		ED_object_editmode_exit(C, EM_FREEDATA);
	}

	WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, obedit);

	return OPERATOR_FINISHED;
}

//.........这里部分代码省略.........
				nu->orderu = 4;
				nu->orderv = 4;
				nu->flag = CU_SMOOTH;
				nu->bp = (BPoint *)MEM_callocN(sizeof(BPoint) * (4 * 4), "addNurbprim6");
				nu->flagu = 0;
				nu->flagv = 0;
				bp = nu->bp;

				for (a = 0; a < 4; a++) {
					for (b = 0; b < 4; b++) {
						bp->f1 = SELECT;
						fac = (float)a - 1.5f;
						bp->vec[0] += fac * grid;
						fac = (float)b - 1.5f;
						bp->vec[1] += fac * grid;
						if ((a == 1 || a == 2) && (b == 1 || b == 2)) {
							bp->vec[2] += grid;
						}
						mul_m4_v3(mat, bp->vec);
						bp->vec[3] = 1.0;
						bp++;
					}
				}

				BKE_nurb_knot_calc_u(nu);
				BKE_nurb_knot_calc_v(nu);
			}
			break;
		case CU_PRIM_TUBE: /* Cylinder */
			if (cutype == CU_NURBS) {
				nu = add_nurbs_primitive(C, obedit, mat, CU_NURBS | CU_PRIM_CIRCLE, 0); /* circle */
				nu->resolu = cu->resolu;
				nu->flag = CU_SMOOTH;
				BLI_addtail(editnurb, nu); /* temporal for extrude and translate */
				vec[0] = vec[1] = 0.0;
				vec[2] = -grid;

				mul_mat3_m4_v3(mat, vec);

				ed_editnurb_translate_flag(editnurb, SELECT, vec);
				ed_editnurb_extrude_flag(cu->editnurb, SELECT);
				mul_v3_fl(vec, -2.0f);
				ed_editnurb_translate_flag(editnurb, SELECT, vec);

				BLI_remlink(editnurb, nu);

				a = nu->pntsu * nu->pntsv;
				bp = nu->bp;
				while (a-- > 0) {
					bp->f1 |= SELECT;
					bp++;
				}
			}
			break;
		case CU_PRIM_SPHERE: /* sphere */
			if (cutype == CU_NURBS) {
				float tmp_cent[3] = {0.f, 0.f, 0.f};
				float tmp_vec[3] = {0.f, 0.f, 1.f};

				nu->pntsu = 5;
				nu->pntsv = 1;
				nu->orderu = 3;
				nu->resolu = cu->resolu;
				nu->resolv = cu->resolv;
				nu->flag = CU_SMOOTH;
				nu->bp = (BPoint *)MEM_callocN(sizeof(BPoint) * 5, "addNurbprim6");

/* This function adds data to the keyframes copy/paste buffer, freeing existing data first */
short copy_animedit_keys(bAnimContext *ac, ListBase *anim_data)
{	
	bAnimListElem *ale;
	Scene *scene = ac->scene;
	
	/* clear buffer first */
	free_anim_copybuf();
	
	/* assume that each of these is an F-Curve */
	for (ale = anim_data->first; ale; ale = ale->next) {
		FCurve *fcu = (FCurve *)ale->key_data;
		tAnimCopybufItem *aci;
		BezTriple *bezt, *nbezt, *newbuf;
		int i;
		
		/* firstly, check if F-Curve has any selected keyframes
		 *	- skip if no selected keyframes found (so no need to create unnecessary copy-buffer data)
		 *	- this check should also eliminate any problems associated with using sample-data
		 */
		if (ANIM_fcurve_keyframes_loop(NULL, fcu, NULL, ANIM_editkeyframes_ok(BEZT_OK_SELECTED), NULL) == 0)
			continue;
		
		/* init copybuf item info */
		aci = MEM_callocN(sizeof(tAnimCopybufItem), "AnimCopybufItem");
		aci->id = ale->id;
		aci->id_type = GS(ale->id->name);
		aci->grp = fcu->grp;
		aci->rna_path = MEM_dupallocN(fcu->rna_path);
		aci->array_index = fcu->array_index;
		BLI_addtail(&animcopybuf, aci);
		
		/* add selected keyframes to buffer */
		/* TODO: currently, we resize array every time we add a new vert -
		 * this works ok as long as it is assumed only a few keys are copied */
		for (i = 0, bezt = fcu->bezt; i < fcu->totvert; i++, bezt++) {
			if (BEZSELECTED(bezt)) {
				/* add to buffer */
				newbuf = MEM_callocN(sizeof(BezTriple) * (aci->totvert + 1), "copybuf beztriple");
				
				/* assume that since we are just re-sizing the array, just copy all existing data across */
				if (aci->bezt)
					memcpy(newbuf, aci->bezt, sizeof(BezTriple) * (aci->totvert));
				
				/* copy current beztriple across too */
				nbezt = &newbuf[aci->totvert];
				*nbezt = *bezt;
				
				/* ensure copy buffer is selected so pasted keys are selected */
				BEZ_SEL(nbezt);
				
				/* free old array and set the new */
				if (aci->bezt) MEM_freeN(aci->bezt);
				aci->bezt = newbuf;
				aci->totvert++;
				
				/* check if this is the earliest frame encountered so far */
				if (bezt->vec[1][0] < animcopy_firstframe)
					animcopy_firstframe = bezt->vec[1][0];
				if (bezt->vec[1][0] > animcopy_lastframe)
					animcopy_lastframe = bezt->vec[1][0];
			}
		}
		
	}
	
	/* check if anything ended up in the buffer */
	if (ELEM(NULL, animcopybuf.first, animcopybuf.last))
		return -1;

	/* in case 'relative' paste method is used */
	animcopy_cfra = CFRA;

	/* everything went fine */
	return 0;
}

/* Get (or add relevant data to be able to do so) F-Curve from the driver stack, 
 * for the given Animation Data block. This assumes that all the destinations are valid.
 *	
 *	- add:	0 - don't add anything if not found, 
 *			1 - add new Driver FCurve (with keyframes for visual tweaking),
 *			2 - add new Driver FCurve (with generator, for script backwards compatibility)
 *			-1 - add new Driver FCurve without driver stuff (for pasting)
 */
FCurve *verify_driver_fcurve(ID *id, const char rna_path[], const int array_index, short add)
{
	AnimData *adt;
	FCurve *fcu;
	
	/* sanity checks */
	if (ELEM(NULL, id, rna_path))
		return NULL;
	
	/* init animdata if none available yet */
	adt = BKE_animdata_from_id(id);
	if ((adt == NULL) && (add))
		adt = BKE_id_add_animdata(id);
	if (adt == NULL) {
		/* if still none (as not allowed to add, or ID doesn't have animdata for some reason) */
		return NULL;
	}
		
	/* try to find f-curve matching for this setting 
	 *	- add if not found and allowed to add one
	 *		TODO: add auto-grouping support? how this works will need to be resolved
	 */
	fcu = list_find_fcurve(&adt->drivers, rna_path, array_index);
	
	if ((fcu == NULL) && (add)) {
		/* use default settings to make a F-Curve */
		fcu = MEM_callocN(sizeof(FCurve), "FCurve");
		
		fcu->flag = (FCURVE_VISIBLE | FCURVE_SELECTED);
		
		/* store path - make copy, and store that */
		fcu->rna_path = BLI_strdupn(rna_path, strlen(rna_path));
		fcu->array_index = array_index;
		
		/* if add is negative, don't init this data yet, since it will be filled in by the pasted driver */
		if (add > 0) {
			BezTriple *bezt;
			size_t i;
			
			/* add some new driver data */
			fcu->driver = MEM_callocN(sizeof(ChannelDriver), "ChannelDriver");
			fcu->driver->flag |= DRIVER_FLAG_SHOWDEBUG;
			
			/* F-Modifier or Keyframes? */
			// FIXME: replace these magic numbers with defines
			if (add == 2) {
				/* Python API Backwards compatibility hack:
				 * Create FModifier so that old scripts won't break
				 * for now before 2.7 series -- (September 4, 2013)
				 */
				add_fmodifier(&fcu->modifiers, FMODIFIER_TYPE_GENERATOR);
			}
			else {
				/* add 2 keyframes so that user has something to work with 
				 * - These are configured to 0,0 and 1,1 to give a 1-1 mapping
				 *   which can be easily tweaked from there.
				 */
				insert_vert_fcurve(fcu, 0.0f, 0.0f, INSERTKEY_FAST);
				insert_vert_fcurve(fcu, 1.0f, 1.0f, INSERTKEY_FAST);
				
				/* configure this curve to extrapolate */
				for (i = 0, bezt = fcu->bezt;  (i < fcu->totvert) && bezt;  i++, bezt++) {
					bezt->h1 = bezt->h2 = HD_VECT;
				}
				
				fcu->extend = FCURVE_EXTRAPOLATE_LINEAR;
				calchandles_fcurve(fcu);
			}
		}
		
		/* just add F-Curve to end of driver list */
		BLI_addtail(&adt->drivers, fcu);
	}
	
	/* return the F-Curve */
	return fcu;
}

static void screen_opengl_views_setup(OGLRender *oglrender)
{
	RenderResult *rr;
	RenderView *rv;
	SceneRenderView *srv;
	bool is_multiview;
	View3D *v3d = oglrender->v3d;

	RenderData *rd = &oglrender->scene->r;

	rr = RE_AcquireResultWrite(oglrender->re);

	is_multiview = screen_opengl_is_multiview(oglrender);

	if (!is_multiview) {
		/* we only have one view when multiview is off */
		rv = rr->views.first;

		if (rv == NULL) {
			rv = MEM_callocN(sizeof(RenderView), "new opengl render view");
			BLI_addtail(&rr->views, rv);
		}

		while (rv->next) {
			RenderView *rv_del = rv->next;
			BLI_remlink(&rr->views, rv_del);

			if (rv_del->rectf)
				MEM_freeN(rv_del->rectf);

			if (rv_del->rectz)
				MEM_freeN(rv_del->rectz);

			MEM_freeN(rv_del);
		}
	}
	else {
		if (!oglrender->is_sequencer)
			RE_SetOverrideCamera(oglrender->re, V3D_CAMERA_SCENE(oglrender->scene, v3d));

		/* remove all the views that are not needed */
		rv = rr->views.last;
		while (rv) {
			srv = BLI_findstring(&rd->views, rv->name, offsetof(SceneRenderView, name));
			if (BKE_scene_multiview_is_render_view_active(rd, srv)) {
				if (rv->rectf == NULL)
					rv->rectf = MEM_callocN(sizeof(float) * 4 * oglrender->sizex * oglrender->sizey, "screen_opengl_render_init rect");
				rv = rv->prev;
			}
			else {
				RenderView *rv_del = rv;
				rv  = rv_del->prev;

				BLI_remlink(&rr->views, rv_del);

				if (rv_del->rectf)
					MEM_freeN(rv_del->rectf);

				if (rv_del->rectz)
					MEM_freeN(rv_del->rectz);

				MEM_freeN(rv_del);
			}
		}

		/* create all the views that are needed */
		for (srv = rd->views.first; srv; srv = srv->next) {
			if (BKE_scene_multiview_is_render_view_active(rd, srv) == false)
				continue;

			rv = BLI_findstring(&rr->views, srv->name, offsetof(SceneRenderView, name));

			if (rv == NULL) {
				rv = MEM_callocN(sizeof(RenderView), "new opengl render view");
				BLI_strncpy(rv->name, srv->name, sizeof(rv->name));
				BLI_addtail(&rr->views, rv);
			}
		}
	}

	for (rv = rr->views.first; rv; rv = rv->next) {
		if (rv->rectf == NULL) {
			rv->rectf = MEM_callocN(sizeof(float) * 4 * oglrender->sizex * oglrender->sizey, "screen_opengl_render_init rect");
		}
	}

	BLI_lock_thread(LOCK_DRAW_IMAGE);
	if (is_multiview && BKE_scene_multiview_is_stereo3d(rd)) {
		oglrender->ima->flag |= IMA_IS_STEREO;
	}
	else {
		oglrender->ima->flag &= ~IMA_IS_STEREO;
		oglrender->iuser.flag &= ~IMA_SHOW_STEREO;
	}
	BLI_unlock_thread(LOCK_DRAW_IMAGE);

	RE_ReleaseResult(oglrender->re);
}

/* reading without uifont will create one */
void uiStyleInit(void)
{
	uiFont *font;
	uiStyle *style = U.uistyles.first;
	int monofont_size = datatoc_bmonofont_ttf_size;
	unsigned char *monofont_ttf = (unsigned char *)datatoc_bmonofont_ttf;

	/* recover from uninitialized dpi */
	if (U.dpi == 0)
		U.dpi = 72;
	CLAMP(U.dpi, 48, 144);

	for (font = U.uifonts.first; font; font = font->next) {
		BLF_unload_id(font->blf_id);
	}

	if (blf_mono_font != -1) {
		BLF_unload_id(blf_mono_font);
		blf_mono_font = -1;
	}

	if (blf_mono_font_render != -1) {
		BLF_unload_id(blf_mono_font_render);
		blf_mono_font_render = -1;
	}

	font = U.uifonts.first;

	/* default builtin */
	if (font == NULL) {
		font = MEM_callocN(sizeof(uiFont), "ui font");
		BLI_addtail(&U.uifonts, font);
	}

	if (U.font_path_ui[0]) {
		BLI_strncpy(font->filename, U.font_path_ui, sizeof(font->filename));
		font->uifont_id = UIFONT_CUSTOM1;
	}
	else {
		BLI_strncpy(font->filename, "default", sizeof(font->filename));
		font->uifont_id = UIFONT_DEFAULT;
	}

	for (font = U.uifonts.first; font; font = font->next) {

		if (font->uifont_id == UIFONT_DEFAULT) {
#ifdef WITH_INTERNATIONAL
			int font_size = datatoc_bfont_ttf_size;
			unsigned char *font_ttf = (unsigned char *)datatoc_bfont_ttf;
			static int last_font_size = 0;

			/* use unicode font for translation */
			if (U.transopts & USER_DOTRANSLATE) {
				font_ttf = BLF_get_unifont(&font_size);

				if (!font_ttf) {
					/* fall back if not found */
					font_size = datatoc_bfont_ttf_size;
					font_ttf = (unsigned char *)datatoc_bfont_ttf;
				}
			}

			/* relload only if needed */
			if (last_font_size != font_size) {
				BLF_unload("default");
				last_font_size = font_size;
			}

			font->blf_id = BLF_load_mem("default", font_ttf, font_size);
#else
			font->blf_id = BLF_load_mem("default", (unsigned char *)datatoc_bfont_ttf, datatoc_bfont_ttf_size);
#endif
		}
		else {
			font->blf_id = BLF_load(font->filename);
			if (font->blf_id == -1) {
				font->blf_id = BLF_load_mem("default", (unsigned char *)datatoc_bfont_ttf, datatoc_bfont_ttf_size);
			}
		}

		BLF_default_set(font->blf_id);

		if (font->blf_id == -1) {
			if (G.debug & G_DEBUG)
				printf("%s: error, no fonts available\n", __func__);
		}
		else {
			/* ? just for speed to initialize?
			 * Yes, this build the glyph cache and create
			 * the texture.
			 */
			BLF_size(font->blf_id, 11 * U.pixelsize, U.dpi);
			BLF_size(font->blf_id, 12 * U.pixelsize, U.dpi);
			BLF_size(font->blf_id, 14 * U.pixelsize, U.dpi);
		}
	}

	if (style == NULL) {
		ui_style_new(&U.uistyles, "Default Style", UIFONT_DEFAULT);
//.........这里部分代码省略.........

static int gp_duplicate_exec(bContext *C, wmOperator *op)
{
	bGPdata *gpd = ED_gpencil_data_get_active(C);
	
	if (gpd == NULL) {
		BKE_report(op->reports, RPT_ERROR, "No Grease Pencil data");
		return OPERATOR_CANCELLED;
	}
	
	/* for each visible (and editable) layer's selected strokes,
	 * copy the strokes into a temporary buffer, then append
	 * once all done
	 */
	CTX_DATA_BEGIN(C, bGPDlayer *, gpl, editable_gpencil_layers)
	{
		ListBase new_strokes = {NULL, NULL};
		bGPDframe *gpf = gpl->actframe;
		bGPDstroke *gps;
		
		if (gpf == NULL)
			continue;
		
		/* make copies of selected strokes, and deselect these once we're done */
		for (gps = gpf->strokes.first; gps; gps = gps->next) {
			/* skip strokes that are invalid for current view */
			if (ED_gpencil_stroke_can_use(C, gps) == false)
				continue;
			
			if (gps->flag & GP_STROKE_SELECT) {
				if (gps->totpoints == 1) {
					/* Special Case: If there's just a single point in this stroke... */
					bGPDstroke *gpsd;
					
					/* make direct copies of the stroke and its points */
					gpsd = MEM_dupallocN(gps);
					gpsd->points = MEM_dupallocN(gps->points);
					
					/* triangle information - will be calculated on next redraw */
					gpsd->flag |= GP_STROKE_RECALC_CACHES;
					gpsd->triangles = NULL;
					
					/* add to temp buffer */
					gpsd->next = gpsd->prev = NULL;
					BLI_addtail(&new_strokes, gpsd);
				}
				else {
					/* delegate to a helper, as there's too much to fit in here (for copying subsets)... */
					gp_duplicate_points(gps, &new_strokes);
				}
				
				/* deselect original stroke, or else the originals get moved too
				 * (when using the copy + move macro)
				 */
				gps->flag &= ~GP_STROKE_SELECT;
			}
		}
		
		/* add all new strokes in temp buffer to the frame (preventing double-copies) */
		BLI_movelisttolist(&gpf->strokes, &new_strokes);
		BLI_assert(new_strokes.first == NULL);
	}

/* name can be a dynamic string */
void BKE_undo_write(bContext *C, const char *name)
{
	int nr /*, success */ /* UNUSED */;
	UndoElem *uel;

	if ((U.uiflag & USER_GLOBALUNDO) == 0) {
		return;
	}

	if (U.undosteps == 0) {
		return;
	}

	/* remove all undos after (also when curundo == NULL) */
	while (undobase.last != curundo) {
		uel = undobase.last;
		BLI_remlink(&undobase, uel);
		BLO_memfile_free(&uel->memfile);
		MEM_freeN(uel);
	}

	/* make new */
	curundo = uel = MEM_callocN(sizeof(UndoElem), "undo file");
	BLI_strncpy(uel->name, name, sizeof(uel->name));
	BLI_addtail(&undobase, uel);

	/* and limit amount to the maximum */
	nr = 0;
	uel = undobase.last;
	while (uel) {
		nr++;
		if (nr == U.undosteps) break;
		uel = uel->prev;
	}
	if (uel) {
		while (undobase.first != uel) {
			UndoElem *first = undobase.first;
			BLI_remlink(&undobase, first);
			/* the merge is because of compression */
			BLO_memfile_merge(&first->memfile, &first->next->memfile);
			MEM_freeN(first);
		}
	}


	/* disk save version */
	if (UNDO_DISK) {
		static int counter = 0;
		char filename[FILE_MAX];
		char numstr[32];
		int fileflags = G.fileflags & ~(G_FILE_HISTORY); /* don't do file history on undo */

		/* Calculate current filename. */
		counter++;
		counter = counter % U.undosteps;

		BLI_snprintf(numstr, sizeof(numstr), "%d.blend", counter);
		BLI_make_file_string("/", filename, BKE_tempdir_session(), numstr);

		/* success = */ /* UNUSED */ BLO_write_file(CTX_data_main(C), filename, fileflags, NULL, NULL);

		BLI_strncpy(curundo->filename, filename, sizeof(curundo->filename));
	}
	else {
		MemFile *prevfile = NULL;

		if (curundo->prev) prevfile = &(curundo->prev->memfile);

		/* success = */ /* UNUSED */ BLO_write_file_mem(CTX_data_main(C), prevfile, &curundo->memfile, G.fileflags);
		curundo->undo_size = curundo->memfile.size;
	}

	if (U.undomemory != 0) {
		size_t maxmem, totmem;
		/* limit to maximum memory (afterwards, we can't know in advance) */
		totmem = 0;
		maxmem = ((size_t)U.undomemory) * 1024 * 1024;

		/* keep at least two (original + other) */
		uel = undobase.last;
		while (uel && uel->prev) {
			totmem += uel->undo_size;
			if (totmem > maxmem) break;
			uel = uel->prev;
		}

		if (uel) {
			if (uel->prev && uel->prev->prev)
				uel = uel->prev;

			while (undobase.first != uel) {
				UndoElem *first = undobase.first;
				BLI_remlink(&undobase, first);
				/* the merge is because of compression */
				BLO_memfile_merge(&first->memfile, &first->next->memfile);
				MEM_freeN(first);
			}
		}
	}
//.........这里部分代码省略.........

/*
 * - loop over selected shapekeys.
 * - find firstsel/lastsel pairs.
 * - move these into a temp list.
 * - re-key all the original shapes.
 * - copy unselected values back from the original.
 * - free the original.
 */
static int mask_shape_key_rekey_exec(bContext *C, wmOperator *op)
{
	Scene *scene = CTX_data_scene(C);
	const int frame = CFRA;
	Mask *mask = CTX_data_edit_mask(C);
	MaskLayer *masklay;
	bool changed = false;

	const bool do_feather  = RNA_boolean_get(op->ptr, "feather");
	const bool do_location = RNA_boolean_get(op->ptr, "location");

	for (masklay = mask->masklayers.first; masklay; masklay = masklay->next) {

		if (masklay->restrictflag & (MASK_RESTRICT_VIEW | MASK_RESTRICT_SELECT)) {
			continue;
		}

		/* we need at least one point selected here to bother re-interpolating */
		if (!ED_mask_layer_select_check(masklay)) {
			continue;
		}

		if (masklay->splines_shapes.first) {
			MaskLayerShape *masklay_shape, *masklay_shape_next;
			MaskLayerShape *masklay_shape_lastsel = NULL;

			for (masklay_shape = masklay->splines_shapes.first;
			     masklay_shape;
			     masklay_shape = masklay_shape_next)
			{
				MaskLayerShape *masklay_shape_a = NULL;
				MaskLayerShape *masklay_shape_b = NULL;

				masklay_shape_next = masklay_shape->next;

				/* find contiguous selections */
				if (masklay_shape->flag & MASK_SHAPE_SELECT) {
					if (masklay_shape_lastsel == NULL) {
						masklay_shape_lastsel = masklay_shape;
					}
					if ((masklay_shape->next == NULL) ||
					    (((MaskLayerShape *)masklay_shape->next)->flag & MASK_SHAPE_SELECT) == 0)
					{
						masklay_shape_a = masklay_shape_lastsel;
						masklay_shape_b = masklay_shape;
						masklay_shape_lastsel = NULL;

						/* this will be freed below, step over selection */
						masklay_shape_next = masklay_shape->next;
					}
				}

				/* we have a from<>to? - re-interpolate! */
				if (masklay_shape_a && masklay_shape_b) {
					ListBase shapes_tmp = {NULL, NULL};
					MaskLayerShape *masklay_shape_tmp;
					MaskLayerShape *masklay_shape_tmp_next;
					MaskLayerShape *masklay_shape_tmp_last = masklay_shape_b->next;
					MaskLayerShape *masklay_shape_tmp_rekey;

					/* move keys */
					for (masklay_shape_tmp = masklay_shape_a;
					     masklay_shape_tmp && (masklay