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/**
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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) 2008, Blender Foundation
* This is a new part of Blender
*
* Contributor(s): Joshua Leung
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <math.h>
#include "MEM_guardedalloc.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "BLI_math.h"
#include "BLI_blenlib.h"
#include "DNA_listBase.h"
#include "DNA_gpencil_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"
#include "DNA_userdef_types.h"
#include "DNA_vec_types.h"
#include "BKE_blender.h"
#include "BKE_context.h"
#include "BKE_curve.h"
#include "BKE_global.h"
#include "BKE_gpencil.h"
#include "BKE_image.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_utildefines.h"
/* ************************************************** */
/* GENERAL STUFF */
/* --------- Memory Management ------------ */
/* Free strokes belonging to a gp-frame */
void free_gpencil_strokes (bGPDframe *gpf)
{
bGPDstroke *gps, *gpsn;
/* error checking */
if (gpf == NULL) return;
/* free strokes */
for (gps= gpf->strokes.first; gps; gps= gpsn) {
gpsn= gps->next;
/* free stroke memory arrays, then stroke itself */
if (gps->points) MEM_freeN(gps->points);
BLI_freelinkN(&gpf->strokes, gps);
}
}
/* Free all of a gp-layer's frames */
void free_gpencil_frames (bGPDlayer *gpl)
{
bGPDframe *gpf, *gpfn;
/* error checking */
if (gpl == NULL) return;
/* free frames */
for (gpf= gpl->frames.first; gpf; gpf= gpfn) {
gpfn= gpf->next;
/* free strokes and their associated memory */
free_gpencil_strokes(gpf);
BLI_freelinkN(&gpl->frames, gpf);
}
}
/* Free all of the gp-layers for a viewport (list should be &gpd->layers or so) */
void free_gpencil_layers (ListBase *list)
{
bGPDlayer *gpl, *gpln;
/* error checking */
if (list == NULL) return;
/* delete layers*/
for (gpl= list->first; gpl; gpl= gpln) {
gpln= gpl->next;
/* free layers and their data */
free_gpencil_frames(gpl);
BLI_freelinkN(list, gpl);
}
}
/* Free all of GPencil datablock's related data, but not the block itself */
void free_gpencil_data (bGPdata *gpd)
{
/* free layers */
free_gpencil_layers(&gpd->layers);
}
/* -------- Container Creation ---------- */
/* add a new gp-frame to the given layer */
bGPDframe *gpencil_frame_addnew (bGPDlayer *gpl, int cframe)
{
bGPDframe *gpf, *gf;
short state=0;
/* error checking */
if ((gpl == NULL) || (cframe <= 0))
return NULL;
/* allocate memory for this frame */
gpf= MEM_callocN(sizeof(bGPDframe), "bGPDframe");
gpf->framenum= cframe;
/* find appropriate place to add frame */
if (gpl->frames.first) {
for (gf= gpl->frames.first; gf; gf= gf->next) {
/* check if frame matches one that is supposed to be added */
if (gf->framenum == cframe) {
state= -1;
break;
}
/* if current frame has already exceeded the frame to add, add before */
if (gf->framenum > cframe) {
BLI_insertlinkbefore(&gpl->frames, gf, gpf);
state= 1;
break;
}
}
}
/* check whether frame was added successfully */
if (state == -1) {
MEM_freeN(gpf);
printf("Error: frame (%d) existed already for this layer \n", cframe);
}
else if (state == 0) {
/* add to end then! */
BLI_addtail(&gpl->frames, gpf);
}
/* return frame */
return gpf;
}
/* add a new gp-layer and make it the active layer */
bGPDlayer *gpencil_layer_addnew (bGPdata *gpd)
{
bGPDlayer *gpl;
/* check that list is ok */
if (gpd == NULL)
return NULL;
/* allocate memory for frame and add to end of list */
gpl= MEM_callocN(sizeof(bGPDlayer), "bGPDlayer");
/* add to datablock */
BLI_addtail(&gpd->layers, gpl);
/* set basic settings */
gpl->color[3]= 0.9f;
gpl->thickness = 3;
/* auto-name */
sprintf(gpl->info, "GP_Layer");
BLI_uniquename(&gpd->layers, gpl, "GP_Layer", '.', offsetof(bGPDlayer, info[0]), sizeof(gpl->info));
/* make this one the active one */
gpencil_layer_setactive(gpd, gpl);
/* return layer */
return gpl;
}
/* add a new gp-datablock */
bGPdata *gpencil_data_addnew (char name[])
{
bGPdata *gpd;
/* allocate memory for a new block */
gpd= alloc_libblock(&G.main->gpencil, ID_GD, name);
/* initial settings */
gpd->flag = (GP_DATA_DISPINFO|GP_DATA_EXPAND);
/* for now, stick to view is also enabled by default
* since this is more useful...
*/
gpd->flag |= GP_DATA_VIEWALIGN;
return gpd;
}
/* -------- Data Duplication ---------- */
/* make a copy of a given gpencil frame */
bGPDframe *gpencil_frame_duplicate (bGPDframe *src)
{
bGPDstroke *gps, *gpsd;
bGPDframe *dst;
/* error checking */
if (src == NULL)
return NULL;
/* make a copy of the source frame */
dst= MEM_dupallocN(src);
dst->prev= dst->next= NULL;
/* copy strokes */
dst->strokes.first = dst->strokes.last= NULL;
for (gps= src->strokes.first; gps; gps= gps->next) {
/* make copy of source stroke, then adjust pointer to points too */
gpsd= MEM_dupallocN(gps);
gpsd->points= MEM_dupallocN(gps->points);
BLI_addtail(&dst->strokes, gpsd);
}
/* return new frame */
return dst;
}
/* make a copy of a given gpencil layer */
bGPDlayer *gpencil_layer_duplicate (bGPDlayer *src)
{
bGPDframe *gpf, *gpfd;
bGPDlayer *dst;
/* error checking */
if (src == NULL)
return NULL;
/* make a copy of source layer */
dst= MEM_dupallocN(src);
dst->prev= dst->next= NULL;
/* copy frames */
dst->frames.first= dst->frames.last= NULL;
for (gpf= src->frames.first; gpf; gpf= gpf->next) {
/* make a copy of source frame */
gpfd= gpencil_frame_duplicate(gpf);
BLI_addtail(&dst->frames, gpfd);
/* if source frame was the current layer's 'active' frame, reassign that too */
if (gpf == dst->actframe)
dst->actframe= gpfd;
}
/* return new layer */
return dst;
}
/* make a copy of a given gpencil datablock */
bGPdata *gpencil_data_duplicate (bGPdata *src)
{
bGPDlayer *gpl, *gpld;
bGPdata *dst;
/* error checking */
if (src == NULL)
return NULL;
/* make a copy of the base-data */
dst= MEM_dupallocN(src);
/* copy layers */
dst->layers.first= dst->layers.last= NULL;
for (gpl= src->layers.first; gpl; gpl= gpl->next) {
/* make a copy of source layer and its data */
gpld= gpencil_layer_duplicate(gpl);
BLI_addtail(&dst->layers, gpld);
}
/* return new */
return dst;
}
/* -------- GP-Frame API ---------- */
/* delete the last stroke of the given frame */
void gpencil_frame_delete_laststroke (bGPDlayer *gpl, bGPDframe *gpf)
{
bGPDstroke *gps= (gpf) ? gpf->strokes.last : NULL;
int cfra = (gpf) ? gpf->framenum : 0; /* assume that the current frame was not locked */
/* error checking */
if (ELEM(NULL, gpf, gps))
return;
/* free the stroke and its data */
MEM_freeN(gps->points);
BLI_freelinkN(&gpf->strokes, gps);
/* if frame has no strokes after this, delete it */
if (gpf->strokes.first == NULL) {
gpencil_layer_delframe(gpl, gpf);
gpencil_layer_getframe(gpl, cfra, 0);
}
}
/* -------- GP-Layer API ---------- */
/* get the appropriate gp-frame from a given layer
* - this sets the layer's actframe var (if allowed to)
* - extension beyond range (if first gp-frame is after all frame in interest and cannot add)
*/
bGPDframe *gpencil_layer_getframe (bGPDlayer *gpl, int cframe, short addnew)
{
bGPDframe *gpf = NULL;
short found = 0;
/* error checking */
if (gpl == NULL) return NULL;
if (cframe <= 0) cframe = 1;
/* check if there is already an active frame */
if (gpl->actframe) {
gpf= gpl->actframe;
/* do not allow any changes to layer's active frame if layer is locked from changes
* or if the layer has been set to stay on the current frame
*/
if (gpl->flag & (GP_LAYER_LOCKED|GP_LAYER_FRAMELOCK))
return gpf;
/* do not allow any changes to actframe if frame has painting tag attached to it */
if (gpf->flag & GP_FRAME_PAINT)
return gpf;
/* try to find matching frame */
if (gpf->framenum < cframe) {
for (; gpf; gpf= gpf->next) {
if (gpf->framenum == cframe) {
found= 1;
break;
}
else if ((gpf->next) && (gpf->next->framenum > cframe)) {
found= 1;
break;
}
}
/* set the appropriate frame */
if (addnew) {
if ((found) && (gpf->framenum == cframe))
gpl->actframe= gpf;
else
gpl->actframe= gpencil_frame_addnew(gpl, cframe);
}
else if (found)
gpl->actframe= gpf;
else
gpl->actframe= gpl->frames.last;
}
else {
for (; gpf; gpf= gpf->prev) {
if (gpf->framenum <= cframe) {
found= 1;
break;
}
}
/* set the appropriate frame */
if (addnew) {
if ((found) && (gpf->framenum == cframe))
gpl->actframe= gpf;
else
gpl->actframe= gpencil_frame_addnew(gpl, cframe);
}
else if (found)
gpl->actframe= gpf;
else
gpl->actframe= gpl->frames.first;
}
}
else if (gpl->frames.first) {
/* check which of the ends to start checking from */
const int first= ((bGPDframe *)(gpl->frames.first))->framenum;
const int last= ((bGPDframe *)(gpl->frames.last))->framenum;
if (abs(cframe-first) > abs(cframe-last)) {
/* find gp-frame which is less than or equal to cframe */
for (gpf= gpl->frames.last; gpf; gpf= gpf->prev) {
if (gpf->framenum <= cframe) {
found= 1;
break;
}
}
}
else {
/* find gp-frame which is less than or equal to cframe */
for (gpf= gpl->frames.first; gpf; gpf= gpf->next) {
if (gpf->framenum <= cframe) {
found= 1;
break;
}
}
}
/* set the appropriate frame */
if (addnew) {
if ((found) && (gpf->framenum == cframe))
gpl->actframe= gpf;
else
gpl->actframe= gpencil_frame_addnew(gpl, cframe);
}
else if (found)
gpl->actframe= gpf;
else {
/* unresolved errogenous situation! */
printf("Error: cannot find appropriate gp-frame \n");
/* gpl->actframe should still be NULL */
}
}
else {
/* currently no frames (add if allowed to) */
if (addnew)
gpl->actframe= gpencil_frame_addnew(gpl, cframe);
else {
/* don't do anything... this may be when no frames yet! */
/* gpl->actframe should still be NULL */
}
}
/* return */
return gpl->actframe;
}
/* delete the given frame from a layer */
void gpencil_layer_delframe (bGPDlayer *gpl, bGPDframe *gpf)
{
/* error checking */
if (ELEM(NULL, gpl, gpf))
return;
/* free the frame and its data */
free_gpencil_strokes(gpf);
BLI_freelinkN(&gpl->frames, gpf);
gpl->actframe = NULL;
}
/* get the active gp-layer for editing */
bGPDlayer *gpencil_layer_getactive (bGPdata *gpd)
{
bGPDlayer *gpl;
/* error checking */
if (ELEM(NULL, gpd, gpd->layers.first))
return NULL;
/* loop over layers until found (assume only one active) */
for (gpl=gpd->layers.first; gpl; gpl=gpl->next) {
if (gpl->flag & GP_LAYER_ACTIVE)
return gpl;
}
/* no active layer found */
return NULL;
}
/* set the active gp-layer */
void gpencil_layer_setactive (bGPdata *gpd, bGPDlayer *active)
{
bGPDlayer *gpl;
/* error checking */
if (ELEM3(NULL, gpd, gpd->layers.first, active))
return;
/* loop over layers deactivating all */
for (gpl=gpd->layers.first; gpl; gpl=gpl->next)
gpl->flag &= ~GP_LAYER_ACTIVE;
/* set as active one */
active->flag |= GP_LAYER_ACTIVE;
}
/* delete the active gp-layer */
void gpencil_layer_delactive (bGPdata *gpd)
{
bGPDlayer *gpl= gpencil_layer_getactive(gpd);
/* error checking */
if (ELEM(NULL, gpd, gpl))
return;
/* free layer */
free_gpencil_frames(gpl);
BLI_freelinkN(&gpd->layers, gpl);
}
/* ************************************************** */
|