font.c

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/*  font.c
 *  
 * 
 * $Id: font.c 36403 2011-05-01 06:34:40Z campbellbarton $
 *
 * ***** 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) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <wchar.h>
#include <wctype.h>

#include "MEM_guardedalloc.h"

#include "BLI_math.h"
#include "BLI_blenlib.h"
#include "BLI_vfontdata.h"
#include "BLI_utildefines.h"

#include "DNA_packedFile_types.h"
#include "DNA_curve_types.h"
#include "DNA_vfont_types.h"
#include "DNA_scene_types.h"
#include "DNA_object_types.h"

#include "BKE_utildefines.h"
#include "BKE_packedFile.h"
#include "BKE_library.h"
#include "BKE_font.h"
#include "BKE_global.h"
#include "BKE_main.h"
#include "BKE_anim.h"
#include "BKE_curve.h"
#include "BKE_displist.h"

static ListBase ttfdata= {NULL, NULL};

/* UTF-8 <-> wchar transformations */
size_t chtoutf8(const unsigned long c, char o[4])
{
        // Variables and initialization
/*      memset(o, 0, 4);        */

        // Create the utf-8 string
        if (c < 0x80) {
                o[0] = (char) c;
                return 1;
        }
        else if (c < 0x800) {
                o[0] = (0xC0 | (c>>6));
                o[1] = (0x80 | (c & 0x3f));
                return 2;
        }
        else if (c < 0x10000) {
                o[0] = (0xe0 | (c >> 12));
                o[1] = (0x80 | (c >>6 & 0x3f));
                o[2] = (0x80 | (c & 0x3f));
                return 3;
        }
        else if (c < 0x200000) {
                o[0] = (0xf0 | (c>>18));
                o[1] = (0x80 | (c >>12 & 0x3f));
                o[2] = (0x80 | (c >> 6 & 0x3f));
                o[3] = (0x80 | (c & 0x3f));
                return 4;
        }

        /* should we assert here? */
        return 0;
}

void wcs2utf8s(char *dst, const wchar_t *src)
{
        while(*src) {
                dst += chtoutf8(*src++, dst);
        }

        *dst= '\0';
}

size_t wcsleninu8(wchar_t *src)
{
        char ch_dummy[4];
        size_t len = 0;

        while(*src) {
                len += chtoutf8(*src++, ch_dummy);
        }

        return len;
}

static size_t utf8slen(const char *strc)
{
        int len=0;

        while(*strc) {
                if ((*strc & 0xe0) == 0xc0) {
                        if((strc[1] & 0x80) && (strc[1] & 0x40) == 0x00)
                                strc++;
                } else if ((*strc & 0xf0) == 0xe0) {
                        if((strc[1] & strc[2] & 0x80) && ((strc[1] | strc[2]) & 0x40) == 0x00)
                                strc += 2;
                } else if ((*strc & 0xf8) == 0xf0) {
                        if((strc[1] & strc[2] & strc[3] & 0x80) && ((strc[1] | strc[2] | strc[3]) & 0x40) == 0x00)
                                strc += 3;
                }

                strc++;
                len++;
        }

        return len;
}


/* Converts Unicode to wchar

According to RFC 3629 "UTF-8, a transformation format of ISO 10646"
(http://tools.ietf.org/html/rfc3629), the valid UTF-8 encoding are:

  Char. number range  |        UTF-8 octet sequence
          (hexadecimal)    |              (binary)
   --------------------+---------------------------------------------
   0000 0000-0000 007F | 0xxxxxxx
   0000 0080-0000 07FF | 110xxxxx 10xxxxxx
   0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx
   0001 0000-0010 FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx

If the encoding incidated by the first character is incorrect (because the
1 to 3 following characters do not match 10xxxxxx), the output is a '?' and
only a single input character is consumed.

*/

size_t utf8towchar(wchar_t *w, const char *c)
{
        int len=0;

        if(w==NULL || c==NULL) return(0);

        while(*c) {
                if ((*c & 0xe0) == 0xc0) {
                        if((c[1] & 0x80) && (c[1] & 0x40) == 0x00) {
                                *w=((c[0] &0x1f)<<6) | (c[1]&0x3f);
                                c++;
                        } else {
                                *w = '?';
                        }
                } else if ((*c & 0xf0) == 0xe0) {
                        if((c[1] & c[2] & 0x80) && ((c[1] | c[2]) & 0x40) == 0x00) {
                                *w=((c[0] & 0x0f)<<12) | ((c[1]&0x3f)<<6) | (c[2]&0x3f);
                                c += 2;
                        } else {
                                *w = '?';
                        }
                } else if ((*c & 0xf8) == 0xf0) {
                        if((c[1] & c[2] & c[3] & 0x80) && ((c[1] | c[2] | c[3]) & 0x40) == 0x00) {
                                *w=((c[0] & 0x07)<<18) | ((c[1]&0x1f)<<12) | ((c[2]&0x3f)<<6) | (c[3]&0x3f);
                                c += 3;
                        } else {
                                *w = '?';
                        }
                } else
                        *w=(c[0] & 0x7f);

                c++;
                w++;
                len++;
        }
        return len;
}

/* The vfont code */
void free_vfont(struct VFont *vf)
{
        if (vf == NULL) return;

        if (vf->data) {
                while(vf->data->characters.first)
                {
                        VChar *che = vf->data->characters.first;
                        
                        while (che->nurbsbase.first) {
                                Nurb *nu = che->nurbsbase.first;
                                if (nu->bezt) MEM_freeN(nu->bezt);
                                BLI_freelinkN(&che->nurbsbase, nu);
                        }
        
                        BLI_freelinkN(&vf->data->characters, che);
                }

                MEM_freeN(vf->data);
                vf->data = NULL;
        }
        
        if (vf->packedfile) {
                freePackedFile(vf->packedfile);
                vf->packedfile = NULL;
        }
}

static void *builtin_font_data= NULL;
static int builtin_font_size= 0;

void BKE_font_register_builtin(void *mem, int size)
{
        builtin_font_data= mem;
        builtin_font_size= size;
}

static PackedFile *get_builtin_packedfile(void)
{
        if (!builtin_font_data) {
                printf("Internal error, builtin font not loaded\n");

                return NULL;
        } else {
                void *mem= MEM_mallocN(builtin_font_size, "vfd_builtin");

                memcpy(mem, builtin_font_data, builtin_font_size);
        
                return newPackedFileMemory(mem, builtin_font_size);
        }
}

void free_ttfont(void)
{
        struct TmpFont *tf;

        for(tf= ttfdata.first; tf; tf= tf->next) {
                if(tf->pf) freePackedFile(tf->pf); /* NULL when the font file can't be found on disk */
                tf->pf= NULL;
                tf->vfont= NULL;
        }
        BLI_freelistN(&ttfdata);
}

struct TmpFont *vfont_find_tmpfont(VFont *vfont)
{
        struct TmpFont *tmpfnt = NULL;
        
        if(vfont==NULL) return NULL;
        
        // Try finding the font from font list
        tmpfnt = ttfdata.first;
        while(tmpfnt)
        {
                if(tmpfnt->vfont == vfont)
                        break;
                tmpfnt = tmpfnt->next;
        }
        return tmpfnt;
}

static VFontData *vfont_get_data(VFont *vfont)
{
        struct TmpFont *tmpfnt = NULL;
        PackedFile *tpf;
        
        if(vfont==NULL) return NULL;
        
        // Try finding the font from font list
        tmpfnt = vfont_find_tmpfont(vfont);
        
        // And then set the data        
        if (!vfont->data) {
                PackedFile *pf;
                
                if (strcmp(vfont->name, FO_BUILTIN_NAME)==0) {
                        pf= get_builtin_packedfile();
                } else {
                        if (vfont->packedfile) {
                                pf= vfont->packedfile;
                                
                                // We need to copy a tmp font to memory unless it is already there
                                if(!tmpfnt)
                                {
                                        tpf= MEM_callocN(sizeof(*tpf), "PackedFile");
                                        tpf->data= MEM_mallocN(pf->size, "packFile");
                                        tpf->size= pf->size;
                                        memcpy(tpf->data, pf->data, pf->size);
                                        
                                        // Add temporary packed file to globals
                                        tmpfnt= (struct TmpFont *) MEM_callocN(sizeof(struct TmpFont), "temp_font");
                                        tmpfnt->pf= tpf;
                                        tmpfnt->vfont= vfont;
                                        BLI_addtail(&ttfdata, tmpfnt);
                                }
                        } else {
                                pf= newPackedFile(NULL, vfont->name);
                                
                                if(!tmpfnt)
                                {
                                        tpf= newPackedFile(NULL, vfont->name);
                                        
                                        // Add temporary packed file to globals
                                        tmpfnt= (struct TmpFont *) MEM_callocN(sizeof(struct TmpFont), "temp_font");
                                        tmpfnt->pf= tpf;
                                        tmpfnt->vfont= vfont;
                                        BLI_addtail(&ttfdata, tmpfnt);
                                }
                        }
                        if(!pf) {
                                printf("Font file doesn't exist: %s\n", vfont->name);

                                strcpy(vfont->name, FO_BUILTIN_NAME);
                                pf= get_builtin_packedfile();
                        }
                }
                
                if (pf) {
                        vfont->data= BLI_vfontdata_from_freetypefont(pf);
                        if (pf != vfont->packedfile) {
                                freePackedFile(pf);
                        }
                }
        }
        
        return vfont->data;     
}

VFont *load_vfont(const char *name)
{
        char filename[FILE_MAXFILE];
        VFont *vfont= NULL;
        PackedFile *pf;
        PackedFile *tpf = NULL; 
        int is_builtin;
        struct TmpFont *tmpfnt;
        
        if (strcmp(name, FO_BUILTIN_NAME)==0) {
                BLI_strncpy(filename, name, sizeof(filename));
                
                pf= get_builtin_packedfile();
                is_builtin= 1;
        } else {
                char dir[FILE_MAXDIR];
                
                BLI_strncpy(dir, name, sizeof(dir));
                BLI_splitdirstring(dir, filename);

                pf= newPackedFile(NULL, name);
                tpf= newPackedFile(NULL, name);         
                
                is_builtin= 0;
        }

        if (pf) {
                VFontData *vfd;

                vfd= BLI_vfontdata_from_freetypefont(pf);
                if (vfd) {
                        vfont = alloc_libblock(&G.main->vfont, ID_VF, filename);
                        vfont->data = vfd;

                        /* if there's a font name, use it for the ID name */
                        if (vfd->name[0] != '\0') {
                                BLI_strncpy(vfont->id.name+2, vfd->name, sizeof(vfont->id.name)-2);
                        }
                        BLI_strncpy(vfont->name, name, sizeof(vfont->name));

                        // if autopack is on store the packedfile in de font structure
                        if (!is_builtin && (G.fileflags & G_AUTOPACK)) {
                                vfont->packedfile = pf;
                        }
                        
                        // Do not add FO_BUILTIN_NAME to temporary listbase
                        if(strcmp(filename, FO_BUILTIN_NAME))
                        {
                                tmpfnt= (struct TmpFont *) MEM_callocN(sizeof(struct TmpFont), "temp_font");
                                tmpfnt->pf= tpf;
                                tmpfnt->vfont= vfont;
                                BLI_addtail(&ttfdata, tmpfnt);
                        }                       
                }
                
                // Free the packed file
                if (!vfont || vfont->packedfile != pf) {
                        freePackedFile(pf);
                }
        
                //XXX waitcursor(0);
        }
        
        return vfont;
}

static VFont *which_vfont(Curve *cu, CharInfo *info)
{
        switch(info->flag & (CU_CHINFO_BOLD|CU_CHINFO_ITALIC)) {
                case CU_CHINFO_BOLD:
                        if (cu->vfontb) return(cu->vfontb); else return(cu->vfont);
                case CU_CHINFO_ITALIC:
                        if (cu->vfonti) return(cu->vfonti); else return(cu->vfont);
                case (CU_CHINFO_BOLD|CU_CHINFO_ITALIC):
                        if (cu->vfontbi) return(cu->vfontbi); else return(cu->vfont);
                default:
                        return(cu->vfont);
        }                       
}

VFont *get_builtin_font(void)
{
        VFont *vf;
        
        for (vf= G.main->vfont.first; vf; vf= vf->id.next)
                if (strcmp(vf->name, FO_BUILTIN_NAME)==0)
                        return vf;
        
        return load_vfont(FO_BUILTIN_NAME);
}

static VChar *find_vfont_char(VFontData *vfd, intptr_t character)
{
        VChar *che= NULL;

        for(che = vfd->characters.first; che; che = che->next) {
                if(che->index == character)
                        break;
        }
        return che; /* NULL if not found */
}
                
static void build_underline(Curve *cu, float x1, float y1, float x2, float y2, int charidx, short mat_nr)
{
        Nurb *nu2;
        BPoint *bp;
        
        nu2 =(Nurb*) MEM_callocN(sizeof(Nurb),"underline_nurb");
        if (nu2 == NULL) return;
        nu2->resolu= cu->resolu;
        nu2->bezt = NULL;
        nu2->knotsu = nu2->knotsv = NULL;
        nu2->flag= CU_2D;
        nu2->charidx = charidx+1000;
        if (mat_nr > 0) nu2->mat_nr= mat_nr-1;
        nu2->pntsu = 4;
        nu2->pntsv = 1;
        nu2->orderu = 4;
        nu2->orderv = 1;
        nu2->flagu = CU_NURB_CYCLIC;

        bp = (BPoint*)MEM_callocN(4 * sizeof(BPoint),"underline_bp"); 
        if (bp == NULL){
                MEM_freeN(nu2);
                return;
        }
        nu2->bp = bp;

        nu2->bp[0].vec[0] = x1;
        nu2->bp[0].vec[1] = y1; 
        nu2->bp[0].vec[2] = 0;
        nu2->bp[0].vec[3] = 1.0f;
        nu2->bp[1].vec[0] = x2;
        nu2->bp[1].vec[1] = y1;
        nu2->bp[1].vec[2] = 0;  
        nu2->bp[1].vec[3] = 1.0f;
        nu2->bp[2].vec[0] = x2;
        nu2->bp[2].vec[1] = y2; 
        nu2->bp[2].vec[2] = 0;
        nu2->bp[2].vec[3] = 1.0f;
        nu2->bp[3].vec[0] = x1;
        nu2->bp[3].vec[1] = y2;
        nu2->bp[3].vec[2] = 0;  
        nu2->bp[3].vec[3] = 1.0f;
        
        BLI_addtail(&(cu->nurb), nu2);  

}

static void buildchar(Curve *cu, unsigned long character, CharInfo *info, float ofsx, float ofsy, float rot, int charidx)
{
        BezTriple *bezt1, *bezt2;
        Nurb *nu1 = NULL, *nu2 = NULL;
        float *fp, fsize, shear, x, si, co;
        VFontData *vfd = NULL;
        VChar *che = NULL;
        int i;

        vfd= vfont_get_data(which_vfont(cu, info));     
        if (!vfd) return;

        /*
        if (cu->selend < cu->selstart) {
                if ((charidx >= (cu->selend)) && (charidx <= (cu->selstart-2)))
                        sel= 1;
        }
        else {
                if ((charidx >= (cu->selstart-1)) && (charidx <= (cu->selend-1)))
                        sel= 1;
        }
        */

        /* make a copy at distance ofsx,ofsy with shear*/
        fsize= cu->fsize;
        shear= cu->shear;
        si= (float)sin(rot);
        co= (float)cos(rot);

        che= find_vfont_char(vfd, character);
        
        // Select the glyph data
        if(che)
                nu1 = che->nurbsbase.first;

        // Create the character
        while(nu1)
        {
                bezt1 = nu1->bezt;
                if (bezt1){
                        nu2 =(Nurb*) MEM_mallocN(sizeof(Nurb),"duplichar_nurb");
                        if (nu2 == NULL) break;
                        memcpy(nu2, nu1, sizeof(struct Nurb));
                        nu2->resolu= cu->resolu;
                        nu2->bp = NULL;
                        nu2->knotsu = nu2->knotsv = NULL;
                        nu2->flag= CU_SMOOTH;
                        nu2->charidx = charidx;
                        if (info->mat_nr) {
                                nu2->mat_nr= info->mat_nr-1;
                        }
                        else {
                                nu2->mat_nr= 0;
                        }
                        /* nu2->trim.first = 0; */
                        /* nu2->trim.last = 0; */
                        i = nu2->pntsu;

                        bezt2 = (BezTriple*)MEM_mallocN(i * sizeof(BezTriple),"duplichar_bezt2"); 
                        if (bezt2 == NULL){
                                MEM_freeN(nu2);
                                break;
                        }
                        memcpy(bezt2, bezt1, i * sizeof(struct BezTriple));
                        nu2->bezt = bezt2;
                        
                        if (shear != 0.0f) {
                                bezt2 = nu2->bezt;
                                
                                for (i= nu2->pntsu; i > 0; i--) {
                                        bezt2->vec[0][0] += shear * bezt2->vec[0][1];
                                        bezt2->vec[1][0] += shear * bezt2->vec[1][1];
                                        bezt2->vec[2][0] += shear * bezt2->vec[2][1];
                                        bezt2++;
                                }
                        }
                        if(rot != 0.0f) {
                                bezt2= nu2->bezt;
                                for (i=nu2->pntsu; i > 0; i--) {
                                        fp= bezt2->vec[0];
                                        
                                        x= fp[0];
                                        fp[0]= co*x + si*fp[1];
                                        fp[1]= -si*x + co*fp[1];
                                        x= fp[3];
                                        fp[3]= co*x + si*fp[4];
                                        fp[4]= -si*x + co*fp[4];
                                        x= fp[6];
                                        fp[6]= co*x + si*fp[7];
                                        fp[7]= -si*x + co*fp[7];

                                        bezt2++;
                                }
                        }
                        bezt2 = nu2->bezt;

                        if(info->flag & CU_CHINFO_SMALLCAPS_CHECK) {
                                const float sca= cu->smallcaps_scale;
                                for (i= nu2->pntsu; i > 0; i--) {
                                        fp= bezt2->vec[0];
                                        fp[0] *= sca;
                                        fp[1] *= sca;
                                        fp[3] *= sca;
                                        fp[4] *= sca;
                                        fp[6] *= sca;
                                        fp[7] *= sca;
                                        bezt2++;
                                }
                        }
                        bezt2 = nu2->bezt;

                        for (i= nu2->pntsu; i > 0; i--) {
                                fp= bezt2->vec[0];
                                fp[0]= (fp[0]+ofsx)*fsize;
                                fp[1]= (fp[1]+ofsy)*fsize;
                                fp[3]= (fp[3]+ofsx)*fsize;
                                fp[4]= (fp[4]+ofsy)*fsize;
                                fp[6]= (fp[6]+ofsx)*fsize;
                                fp[7]= (fp[7]+ofsy)*fsize;
                                bezt2++;
                        }
                        
                        BLI_addtail(&(cu->nurb), nu2);
                }
                
                nu1 = nu1->next;
        }
}

int BKE_font_getselection(Object *ob, int *start, int *end)
{
        Curve *cu= ob->data;
        
        if (cu->editfont==NULL || ob->type != OB_FONT) return 0;

        if (cu->selstart == 0) return 0;
        if (cu->selstart <= cu->selend) {
                *start = cu->selstart-1;
                *end = cu->selend-1;
                return 1;
        }
        else {
                *start = cu->selend;
                *end = cu->selstart-2;
                return -1;
        }
}

static float char_width(Curve *cu, VChar *che, CharInfo *info)
{
        // The character wasn't found, propably ascii = 0, then the width shall be 0 as well
        if(che == NULL) {
                return 0.0f;
        }
        else if(info->flag & CU_CHINFO_SMALLCAPS_CHECK) {
                return che->width * cu->smallcaps_scale;
        }
        else {
                return che->width;
        }
}

struct chartrans *BKE_text_to_curve(Scene *scene, Object *ob, int mode) 
{
        VFont *vfont, *oldvfont;
        VFontData *vfd= NULL;
        Curve *cu;
        CharInfo *info = NULL, *custrinfo;
        TextBox *tb;
        VChar *che;
        struct chartrans *chartransdata=NULL, *ct;
        float *f, xof, yof, xtrax, linedist, *linedata, *linedata2, *linedata3, *linedata4;
        float twidth, maxlen= 0;
        int i, slen, j;
        int curbox;
        int selstart, selend;
        int utf8len;
        short cnr=0, lnr=0, wsnr= 0;
        wchar_t *mem, *tmp, ascii;

        /* renark: do calculations including the trailing '\0' of a string
           because the cursor can be at that location */

        if(ob->type!=OB_FONT) return NULL;

        // Set font data
        cu= (Curve *) ob->data;
        vfont= cu->vfont;
        
        if(cu->str == NULL) return NULL;
        if(vfont == NULL) return NULL;

        // Create unicode string
        utf8len = utf8slen(cu->str);
        mem = MEM_callocN(((utf8len + 1) * sizeof(wchar_t)), "convertedmem");
        
        utf8towchar(mem, cu->str);

        // Count the wchar_t string length
        slen = wcslen(mem);

        if (cu->ulheight == 0.0f)
                cu->ulheight = 0.05f;
        
        if (cu->strinfo==NULL)  /* old file */
                cu->strinfo = MEM_callocN((slen+4) * sizeof(CharInfo), "strinfo compat");
        
        custrinfo= cu->strinfo;
        if (cu->editfont)
                custrinfo= cu->editfont->textbufinfo;
        
        if (cu->tb==NULL)
                cu->tb= MEM_callocN(MAXTEXTBOX*sizeof(TextBox), "TextBox compat");

        vfd= vfont_get_data(vfont);

        /* The VFont Data can not be found */
        if(!vfd) {
                if(mem)
                        MEM_freeN(mem); 
                return NULL;
        }

        /* calc offset and rotation of each char */
        ct = chartransdata =
                (struct chartrans*)MEM_callocN((slen+1)* sizeof(struct chartrans),"buildtext");

        /* We assume the worst case: 1 character per line (is freed at end anyway) */

        linedata= MEM_mallocN(sizeof(float)*(slen*2 + 1),"buildtext2");
        linedata2= MEM_mallocN(sizeof(float)*(slen*2 + 1),"buildtext3");
        linedata3= MEM_callocN(sizeof(float)*(slen*2 + 1),"buildtext4");        
        linedata4= MEM_callocN(sizeof(float)*(slen*2 + 1),"buildtext5");                
        
        linedist= cu->linedist;
        
        xof= cu->xof + (cu->tb[0].x/cu->fsize);
        yof= cu->yof + (cu->tb[0].y/cu->fsize);

        xtrax= 0.5f*cu->spacing-0.5f;

        oldvfont = NULL;

        for (i=0; i<slen; i++) custrinfo[i].flag &= ~(CU_CHINFO_WRAP|CU_CHINFO_SMALLCAPS_CHECK);

        if (cu->selboxes) MEM_freeN(cu->selboxes);
        cu->selboxes = NULL;
        if (BKE_font_getselection(ob, &selstart, &selend))
                cu->selboxes = MEM_callocN((selend-selstart+1)*sizeof(SelBox), "font selboxes");

        tb = &(cu->tb[0]);
        curbox= 0;
        for (i = 0 ; i<=slen ; i++) {
        makebreak:
                // Characters in the list
                info = &(custrinfo[i]);
                ascii = mem[i];
                if(info->flag & CU_CHINFO_SMALLCAPS) {
                        ascii = towupper(ascii);
                        if(mem[i] != ascii) {
                                mem[i]= ascii;
                                info->flag |= CU_CHINFO_SMALLCAPS_CHECK;
                        }
                }

                vfont = which_vfont(cu, info);
                
                if(vfont==NULL) break;

                che= find_vfont_char(vfd, ascii);

                /*
                 * The character wasn't in the current curve base so load it
                 * But if the font is FO_BUILTIN_NAME then do not try loading since
                 * whole font is in the memory already
                 */
                if(che == NULL && strcmp(vfont->name, FO_BUILTIN_NAME)) {
                        BLI_vfontchar_from_freetypefont(vfont, ascii);
                }

                /* Try getting the character again from the list */
                che= find_vfont_char(vfd, ascii);

                /* No VFont found */
                if (vfont==NULL) {
                        if(mem)
                                MEM_freeN(mem);
                        MEM_freeN(chartransdata);
                        return NULL;
                }

                if (vfont != oldvfont) {
                        vfd= vfont_get_data(vfont);
                        oldvfont = vfont;
                }

                /* VFont Data for VFont couldn't be found */
                if (!vfd) {
                        if(mem)
                                MEM_freeN(mem);
                        MEM_freeN(chartransdata);
                        return NULL;
                }

                twidth = char_width(cu, che, info);

                // Calculate positions
                if((tb->w != 0.0f) && (ct->dobreak==0) && ((xof-(tb->x/cu->fsize)+twidth)*cu->fsize) > tb->w + cu->xof*cu->fsize) {
        //              fprintf(stderr, "linewidth exceeded: %c%c%c...\n", mem[i], mem[i+1], mem[i+2]);
                        for (j=i; j && (mem[j] != '\n') && (mem[j] != '\r') && (chartransdata[j].dobreak==0); j--) {
                                if (mem[j]==' ' || mem[j]=='-') {
                                        ct -= (i-(j-1));
                                        cnr -= (i-(j-1));
                                        if (mem[j] == ' ') wsnr--;
                                        if (mem[j] == '-') wsnr++;
                                        i = j-1;
                                        xof = ct->xof;
                                        ct[1].dobreak = 1;
                                        custrinfo[i+1].flag |= CU_CHINFO_WRAP;
                                        goto makebreak;
                                }
                                if (chartransdata[j].dobreak) {
        //                              fprintf(stderr, "word too long: %c%c%c...\n", mem[j], mem[j+1], mem[j+2]);
                                        ct->dobreak= 1;
                                        custrinfo[i+1].flag |= CU_CHINFO_WRAP;
                                        ct -= 1;
                                        cnr -= 1;
                                        i--;
                                        xof = ct->xof;
                                        goto makebreak;
                                }
                        }
                }
                if(ascii== '\n' || ascii== '\r' || ascii==0 || ct->dobreak) {
                        ct->xof= xof;
                        ct->yof= yof;
                        ct->linenr= lnr;
                        ct->charnr= cnr;
                        
                        yof-= linedist;
                        
                        maxlen= MAX2(maxlen, (xof-tb->x/cu->fsize));
                        linedata[lnr]= xof-tb->x/cu->fsize;
                        linedata2[lnr]= cnr;
                        linedata3[lnr]= tb->w/cu->fsize;
                        linedata4[lnr]= wsnr;
                        
                        if ( (tb->h != 0.0f) &&
                                 ((-(yof-(tb->y/cu->fsize))) > ((tb->h/cu->fsize)-(linedist*cu->fsize)) - cu->yof) &&
                                 (cu->totbox > (curbox+1)) ) {
                                maxlen= 0;
                                tb++;
                                curbox++;
                                yof= cu->yof + tb->y/cu->fsize;
                        }

                        /* XXX, has been unused for years, need to check if this is useful, r4613 r5282 - campbell */
#if 0
                        if(ascii == '\n' || ascii == '\r')
                                xof = cu->xof;
                        else
                                xof= cu->xof + (tb->x/cu->fsize);
#else
                        xof= cu->xof + (tb->x/cu->fsize);
#endif
                        lnr++;
                        cnr= 0;
                        wsnr= 0;
                }
                else if(ascii==9) {     /* TAB */
                        float tabfac;
                        
                        ct->xof= xof;
                        ct->yof= yof;
                        ct->linenr= lnr;
                        ct->charnr= cnr++;

                        tabfac= (xof-cu->xof+0.01f);
                        tabfac= 2.0f*ceilf(tabfac/2.0f);
                        xof= cu->xof+tabfac;
                }
                else {
                        SelBox *sb= NULL;
                        float wsfac;

                        ct->xof= xof;
                        ct->yof= yof;
                        ct->linenr= lnr;
                        ct->charnr= cnr++;

                        if (cu->selboxes && (i>=selstart) && (i<=selend)) {
                                sb = &(cu->selboxes[i-selstart]);
                                sb->y = yof*cu->fsize-linedist*cu->fsize*0.1f;
                                sb->h = linedist*cu->fsize;
                                sb->w = xof*cu->fsize;
                        }
        
                        if (ascii==32) {
                                wsfac = cu->wordspace; 
                                wsnr++;
                        } 
                        else wsfac = 1.0f;
                        
                        // Set the width of the character
                        twidth = char_width(cu, che, info);

                        xof += (twidth*wsfac*(1.0f+(info->kern/40.0f)) ) + xtrax;
                        
                        if (sb) 
                                sb->w = (xof*cu->fsize) - sb->w;
                }
                ct++;
        }
        
        cu->lines= 1;
        ct= chartransdata;
        tmp = mem;
        for (i= 0; i<=slen; i++, tmp++, ct++) {
                ascii = *tmp;
                if(ascii== '\n' || ascii== '\r' || ct->dobreak) cu->lines++;
        }       

        // linedata is now: width of line
        // linedata2 is now: number of characters
        // linedata3 is now: maxlen of that line
        // linedata4 is now: number of whitespaces of line

        if(cu->spacemode!=CU_LEFT) {
                ct= chartransdata;

                if(cu->spacemode==CU_RIGHT) {
                        for(i=0;i<lnr;i++) linedata[i]= linedata3[i]-linedata[i];
                        for (i=0; i<=slen; i++) {
                                ct->xof+= linedata[ct->linenr];
                                ct++;
                        }
                } else if(cu->spacemode==CU_MIDDLE) {
                        for(i=0;i<lnr;i++) linedata[i]= (linedata3[i]-linedata[i])/2;
                        for (i=0; i<=slen; i++) {
                                ct->xof+= linedata[ct->linenr];
                                ct++;
                        }
                } else if((cu->spacemode==CU_FLUSH) &&
                                  (cu->tb[0].w != 0.0f)) {
                        for(i=0;i<lnr;i++)
                                if(linedata2[i]>1)
                                        linedata[i]= (linedata3[i]-linedata[i])/(linedata2[i]-1);
                        for (i=0; i<=slen; i++) {
                                for (j=i; (mem[j]) && (mem[j]!='\n') && 
                                                  (mem[j]!='\r') && (chartransdata[j].dobreak==0) && (j<slen); j++);
//                              if ((mem[j]!='\r') && (mem[j]!='\n') && (mem[j])) {
                                        ct->xof+= ct->charnr*linedata[ct->linenr];
//                              }
                                ct++;
                        }
                } 
                else if((cu->spacemode==CU_JUSTIFY) && (cu->tb[0].w != 0.0f)) {
                        float curofs= 0.0f;
                        for (i=0; i<=slen; i++) {
                                for (j=i; (mem[j]) && (mem[j]!='\n') && 
                                                  (mem[j]!='\r') && (chartransdata[j].dobreak==0) && (j<slen); j++);
                                if ((mem[j]!='\r') && (mem[j]!='\n') &&
                                        ((chartransdata[j].dobreak!=0))) {
                                        if (mem[i]==' ') curofs += (linedata3[ct->linenr]-linedata[ct->linenr])/linedata4[ct->linenr];
                                        ct->xof+= curofs;
                                }
                                if (mem[i]=='\n' || mem[i]=='\r' || chartransdata[i].dobreak) curofs= 0;
                                ct++;
                        }                       
                }
        }
        
        /* TEXT ON CURVE */
        /* Note: Only OB_CURVE objects could have a path  */
        if(cu->textoncurve && cu->textoncurve->type==OB_CURVE) {
                Curve *cucu= cu->textoncurve->data;
                int oldflag= cucu->flag;
                
                cucu->flag |= (CU_PATH+CU_FOLLOW);
                
                if(cucu->path==NULL) makeDispListCurveTypes(scene, cu->textoncurve, 0);
                if(cucu->path) {
                        float distfac, imat[4][4], imat3[3][3], cmat[3][3];
                        float minx, maxx, miny, maxy;
                        float timeofs, sizefac;
                        
                        invert_m4_m4(imat, ob->obmat);
                        copy_m3_m4(imat3, imat);

                        copy_m3_m4(cmat, cu->textoncurve->obmat);
                        mul_m3_m3m3(cmat, cmat, imat3);
                        sizefac= normalize_v3(cmat[0])/cu->fsize;
                        
                        minx=miny= 1.0e20f;
                        maxx=maxy= -1.0e20f;
                        ct= chartransdata;
                        for (i=0; i<=slen; i++, ct++) {
                                if(minx>ct->xof) minx= ct->xof;
                                if(maxx<ct->xof) maxx= ct->xof;
                                if(miny>ct->yof) miny= ct->yof;
                                if(maxy<ct->yof) maxy= ct->yof;
                        }
                        
                        /* we put the x-coordinaat exact at the curve, the y is rotated */
                        
                        /* length correction */
                        distfac= sizefac*cucu->path->totdist/(maxx-minx);
                        timeofs= 0.0f;
                        
                        if(distfac > 1.0f) {
                                /* path longer than text: spacemode involves */
                                distfac= 1.0f/distfac;
                                
                                if(cu->spacemode==CU_RIGHT) {
                                        timeofs= 1.0f-distfac;
                                }
                                else if(cu->spacemode==CU_MIDDLE) {
                                        timeofs= (1.0f-distfac)/2.0f;
                                }
                                else if(cu->spacemode==CU_FLUSH) distfac= 1.0f;
                                
                        }
                        else distfac= 1.0;
                        
                        distfac/= (maxx-minx);
                        
                        timeofs+= distfac*cu->xof;      /* not cyclic */
                        
                        ct= chartransdata;
                        for (i=0; i<=slen; i++, ct++) {
                                float ctime, dtime, vec[4], tvec[4], rotvec[3];
                                float si, co;
                                
                                /* rotate around center character */
                                ascii = mem[i];

                                che= find_vfont_char(vfd, ascii);
        
                                twidth = char_width(cu, che, info);

                                dtime= distfac*0.5f*twidth;

                                ctime= timeofs + distfac*( ct->xof - minx);
                                CLAMP(ctime, 0.0f, 1.0f);

                                /* calc the right loc AND the right rot separately */
                                /* vec, tvec need 4 items */
                                where_on_path(cu->textoncurve, ctime, vec, tvec, NULL, NULL, NULL);
                                where_on_path(cu->textoncurve, ctime+dtime, tvec, rotvec, NULL, NULL, NULL);
                                
                                mul_v3_fl(vec, sizefac);
                                
                                ct->rot= (float)(M_PI-atan2(rotvec[1], rotvec[0]));

                                si= (float)sin(ct->rot);
                                co= (float)cos(ct->rot);

                                yof= ct->yof;
                                
                                ct->xof= vec[0] + si*yof;
                                ct->yof= vec[1] + co*yof;
                                
                        }
                        cucu->flag= oldflag;
                }
        }

        if (cu->selboxes) {
                ct= chartransdata;
                for (i=0; i<=selend; i++, ct++) {
                        if (i>=selstart) {
                                cu->selboxes[i-selstart].x = ct->xof*cu->fsize;
                                cu->selboxes[i-selstart].y = ct->yof*cu->fsize;                         
                        }
                }
        }

        if(mode==FO_CURSUP || mode==FO_CURSDOWN || mode==FO_PAGEUP || mode==FO_PAGEDOWN) {
                /* 2: curs up
                   3: curs down */
                ct= chartransdata+cu->pos;
                
                if((mode==FO_CURSUP || mode==FO_PAGEUP) && ct->linenr==0);
                else if((mode==FO_CURSDOWN || mode==FO_PAGEDOWN) && ct->linenr==lnr);
                else {
                        switch(mode) {
                                case FO_CURSUP:         lnr= ct->linenr-1; break;
                                case FO_CURSDOWN:       lnr= ct->linenr+1; break;
                                case FO_PAGEUP:         lnr= ct->linenr-10; break;
                                case FO_PAGEDOWN:       lnr= ct->linenr+10; break;
                        }
                        cnr= ct->charnr;
                        /* seek for char with lnr en cnr */
                        cu->pos= 0;
                        ct= chartransdata;
                        for (i= 0; i<slen; i++) {
                                if(ct->linenr==lnr) {
                                        if(ct->charnr==cnr) break;
                                        if( (ct+1)->charnr==0) break;
                                }
                                else if(ct->linenr>lnr) break;
                                cu->pos++;
                                ct++;
                        }
                }
        }
        
        /* cursor first */
        if(cu->editfont) {
                float si, co;
                
                ct= chartransdata+cu->pos;
                si= (float)sin(ct->rot);
                co= (float)cos(ct->rot);
                                
                f= cu->editfont->textcurs[0];
                
                f[0]= cu->fsize*(-0.1f*co + ct->xof);
                f[1]= cu->fsize*(0.1f*si + ct->yof);
                
                f[2]= cu->fsize*(0.1f*co + ct->xof);
                f[3]= cu->fsize*(-0.1f*si + ct->yof);
                
                f[4]= cu->fsize*( 0.1f*co + 0.8f*si + ct->xof);
                f[5]= cu->fsize*(-0.1f*si + 0.8f*co + ct->yof);
                
                f[6]= cu->fsize*(-0.1f*co + 0.8f*si + ct->xof);
                f[7]= cu->fsize*( 0.1f*si + 0.8f*co + ct->yof);
                
        }

        MEM_freeN(linedata);
        MEM_freeN(linedata2);           
        MEM_freeN(linedata3);
        MEM_freeN(linedata4);

        if (mode == FO_SELCHANGE) {
                MEM_freeN(chartransdata);
                MEM_freeN(mem);
                return NULL;
        }

        if(mode == FO_EDIT) {
                /* make nurbdata */
                freeNurblist(&cu->nurb);
                
                ct= chartransdata;
                if (cu->sepchar==0) {
                        for (i= 0; i<slen; i++) {
                                unsigned long cha = (uintptr_t) mem[i];
                                info = &(custrinfo[i]);
                                if (info->mat_nr > (ob->totcol)) {
                                        /* printf("Error: Illegal material index (%d) in text object, setting to 0\n", info->mat_nr); */
                                        info->mat_nr = 0;
                                }
                                // We do not want to see any character for \n or \r
                                if(cha != '\n' && cha != '\r')
                                        buildchar(cu, cha, info, ct->xof, ct->yof, ct->rot, i);
                                
                                if ((info->flag & CU_CHINFO_UNDERLINE) && (cu->textoncurve == NULL) && (cha != '\n') && (cha != '\r')) {
                                        float ulwidth, uloverlap= 0.0f;
                                        
                                        if ( (i<(slen-1)) && (mem[i+1] != '\n') && (mem[i+1] != '\r') &&
                                                 ((mem[i+1] != ' ') || (custrinfo[i+1].flag & CU_CHINFO_UNDERLINE)) && ((custrinfo[i+1].flag & CU_CHINFO_WRAP)==0)
                                                 ) {
                                                uloverlap = xtrax + 0.1f;
                                        }
                                        // Find the character, the characters has to be in the memory already 
                                        // since character checking has been done earlier already.
                                        che= find_vfont_char(vfd, cha);

                                        twidth = char_width(cu, che, info);
                                        ulwidth = cu->fsize * ((twidth* (1.0f+(info->kern/40.0f)))+uloverlap);
                                        build_underline(cu, ct->xof*cu->fsize, ct->yof*cu->fsize + (cu->ulpos-0.05f)*cu->fsize,
                                                                        ct->xof*cu->fsize + ulwidth, 
                                                                        ct->yof*cu->fsize + (cu->ulpos-0.05f)*cu->fsize - cu->ulheight*cu->fsize,
                                                                        i, info->mat_nr);
                                }
                                ct++;
                        }
                }
                else {
                        int outta = 0;
                        for (i= 0; (i<slen) && (outta==0); i++) {
                                ascii = mem[i];
                                info = &(custrinfo[i]);
                                if (cu->sepchar == (i+1)) {
                                        float vecyo[3];

                                        vecyo[0]= ct->xof;
                                        vecyo[1]= ct->yof;
                                        vecyo[2]= 0.0f;

                                        mem[0] = ascii;
                                        mem[1] = 0;
                                        custrinfo[0]= *info;
                                        cu->pos = 1;
                                        cu->len = 1;
                                        mul_v3_m4v3(ob->loc, ob->obmat, vecyo);
                                        outta = 1;
                                        cu->sepchar = 0;
                                }
                                ct++;
                        }
                }
        }

        if(mode==FO_DUPLI) {
                MEM_freeN(mem);
                return chartransdata;
        }

        if(mem)
                MEM_freeN(mem);

        MEM_freeN(chartransdata);
        return NULL;
}