/*
 * ***** 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 *****
 */

/** \file blender/blenkernel/intern/font.c
 *  \ingroup bke
 */


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

#include "MEM_guardedalloc.h"

#include "BLI_utildefines.h"
#include "BLI_path_util.h"
#include "BLI_listbase.h"
#include "BLI_ghash.h"
#include "BLI_string.h"
#include "BLI_string_utf8.h"
#include "BLI_math.h"
#include "BLI_threads.h"
#include "BLI_vfontdata.h"

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

static ThreadRWMutex vfont_rwlock = BLI_RWLOCK_INITIALIZER;

/* The vfont code */
void BKE_vfont_free_data(struct VFont *vfont)
{
	if (vfont->data) {
		if (vfont->data->characters) {
			GHashIterator gh_iter;
			GHASH_ITER (gh_iter, vfont->data->characters) {
				VChar *che = BLI_ghashIterator_getValue(&gh_iter);

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

				MEM_freeN(che);
			}

			BLI_ghash_free(vfont->data->characters, NULL, NULL);
		}

		MEM_freeN(vfont->data);
		vfont->data = NULL;
	}

	if (vfont->temp_pf) {
		freePackedFile(vfont->temp_pf);  /* NULL when the font file can't be found on disk */
		vfont->temp_pf = NULL;
	}
}

/** Free (or release) any data used by this font (does not free the font itself). */
void BKE_vfont_free(struct VFont *vf)
{
	BKE_vfont_free_data(vf);

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

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

bool BKE_vfont_is_builtin(struct VFont *vfont)
{
	return STREQ(vfont->name, FO_BUILTIN_NAME);
}

void BKE_vfont_builtin_register(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);
	}
}

static VFontData *vfont_get_data(Main *bmain, VFont *vfont)
{
	if (vfont == NULL) {
		return NULL;
	}

	/* And then set the data */
	if (!vfont->data) {
		PackedFile *pf;

		BLI_rw_mutex_lock(&vfont_rwlock, THREAD_LOCK_WRITE);

		if (vfont->data) {
			/* Check data again, since it might have been already
			 * initialized from other thread (previous check is
			 * not accurate or threading, just prevents unneeded
			 * lock if all the data is here for sure).
			 */
			BLI_rw_mutex_unlock(&vfont_rwlock);
			return vfont->data;
		}

		if (BKE_vfont_is_builtin(vfont)) {
			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 (vfont->temp_pf == NULL) {
					vfont->temp_pf = dupPackedFile(pf);
				}
			}
			else {
				pf = newPackedFile(NULL, vfont->name, ID_BLEND_PATH(bmain, &vfont->id));

				if (vfont->temp_pf == NULL) {
					vfont->temp_pf = newPackedFile(NULL, vfont->name, ID_BLEND_PATH(bmain, &vfont->id));
				}
			}
			if (!pf) {
				printf("Font file doesn't exist: %s\n", vfont->name);

				/* DON'T DO THIS
				 * missing file shouldn't modify path! - campbell */
#if 0
				strcpy(vfont->name, FO_BUILTIN_NAME);
#endif
				pf = get_builtin_packedfile();
			}
		}
		
		if (pf) {
			vfont->data = BLI_vfontdata_from_freetypefont(pf);
			if (pf != vfont->packedfile) {
				freePackedFile(pf);
			}
		}

		BLI_rw_mutex_unlock(&vfont_rwlock);
	}

	return vfont->data;
}

/* Bad naming actually in this case... */
void BKE_vfont_init(VFont *vfont)
{
	PackedFile *pf = get_builtin_packedfile();

	if (pf) {
		VFontData *vfd;

		vfd = BLI_vfontdata_from_freetypefont(pf);
		if (vfd) {
			vfont->data = vfd;

			BLI_strncpy(vfont->name, FO_BUILTIN_NAME, sizeof(vfont->name));
		}

		/* Free the packed file */
		freePackedFile(pf);
	}
}

VFont *BKE_vfont_load(Main *bmain, const char *filepath)
{
	char filename[FILE_MAXFILE];
	VFont *vfont = NULL;
	PackedFile *pf;
	PackedFile *temp_pf = NULL;
	bool is_builtin;
	
	if (STREQ(filepath, FO_BUILTIN_NAME)) {
		BLI_strncpy(filename, filepath, sizeof(filename));
		
		pf = get_builtin_packedfile();
		is_builtin = true;
	}
	else {
		BLI_split_file_part(filepath, filename, sizeof(filename));
		pf = newPackedFile(NULL, filepath, bmain->name);
		temp_pf = newPackedFile(NULL, filepath, bmain->name);
		
		is_builtin = false;
	}

	if (pf) {
		VFontData *vfd;

		vfd = BLI_vfontdata_from_freetypefont(pf);
		if (vfd) {
			vfont = BKE_libblock_alloc(bmain, 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, filepath, 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 (!STREQ(filename, FO_BUILTIN_NAME)) {
				vfont->temp_pf = temp_pf;
			}
		}

		/* Free the packed file */
		if (!vfont || vfont->packedfile != pf) {
			freePackedFile(pf);
		}
	}
	
	return vfont;
}

VFont *BKE_vfont_load_exists_ex(struct Main *bmain, const char *filepath, bool *r_exists)
{
	VFont *vfont;
	char str[FILE_MAX], strtest[FILE_MAX];

	BLI_strncpy(str, filepath, sizeof(str));
	BLI_path_abs(str, bmain->name);

	/* first search an identical filepath */
	for (vfont = bmain->vfont.first; vfont; vfont = vfont->id.next) {
		BLI_strncpy(strtest, vfont->name, sizeof(vfont->name));
		BLI_path_abs(strtest, ID_BLEND_PATH(bmain, &vfont->id));

		if (BLI_path_cmp(strtest, str) == 0) {
			id_us_plus(&vfont->id);  /* officially should not, it doesn't link here! */
			if (r_exists)
				*r_exists = true;
			return vfont;
		}
	}

	if (r_exists)
		*r_exists = false;
	return BKE_vfont_load(bmain, filepath);
}

VFont *BKE_vfont_load_exists(struct Main *bmain, const char *filepath)
{
	return BKE_vfont_load_exists_ex(bmain, filepath, NULL);
}

void BKE_vfont_make_local(Main *bmain, VFont *vfont, const bool lib_local)
{
	BKE_id_make_local_generic(bmain, &vfont->id, true, lib_local);
}

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

VFont *BKE_vfont_builtin_get(void)
{
	VFont *vfont;
	
	for (vfont = G.main->vfont.first; vfont; vfont = vfont->id.next) {
		if (BKE_vfont_is_builtin(vfont)) {
			return vfont;
		}
	}
	
	return BKE_vfont_load(G.main, FO_BUILTIN_NAME);
}

static VChar *find_vfont_char(VFontData *vfd, unsigned int character)
{
	return BLI_ghash_lookup(vfd->characters, SET_UINT_IN_POINTER(character));
}

static void build_underline(Curve *cu, ListBase *nubase, const rctf *rect,
                            float yofs, float rot, int charidx, short mat_nr)
{
	Nurb *nu2;
	BPoint *bp;
	
	nu2 = (Nurb *) MEM_callocN(sizeof(Nurb), "underline_nurb");
	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");

	copy_v4_fl4(bp[0].vec, rect->xmin, (rect->ymax + yofs), 0.0f, 1.0f);
	copy_v4_fl4(bp[1].vec, rect->xmax, (rect->ymax + yofs), 0.0f, 1.0f);
	copy_v4_fl4(bp[2].vec, rect->xmax, (rect->ymin + yofs), 0.0f, 1.0f);
	copy_v4_fl4(bp[3].vec, rect->xmin, (rect->ymin + yofs), 0.0f, 1.0f);

	nu2->bp = bp;
	BLI_addtail(nubase, nu2);

	if (rot != 0.0f) {
		float si, co;
		int i;

		si = sinf(rot);
		co = cosf(rot);

		for (i = nu2->pntsu; i > 0; i--) {
			float *fp;
			float x, y;

			fp = bp->vec;

			x = fp[0] - rect->xmin;
			y = fp[1] - rect->ymin;

			fp[0] = (+co * x + si * y) + rect->xmin;
			fp[1] = (-si * x + co * y) + rect->ymin;

			bp++;
		}

		bp = nu2->bp;
	}

	mul_v2_fl(bp[0].vec, cu->fsize);
	mul_v2_fl(bp[1].vec, cu->fsize);
	mul_v2_fl(bp[2].vec, cu->fsize);
	mul_v2_fl(bp[3].vec, cu->fsize);
}

static void buildchar(Main *bmain, Curve *cu, ListBase *nubase, unsigned int 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(bmain, which_vfont(cu, info));
	if (!vfd) return;

#if 0
	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;
	}
#endif

	/* make a copy at distance ofsx, ofsy with shear */
	fsize = cu->fsize;
	shear = cu->shear;
	si = sinf(rot);
	co = cosf(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 > 0) {
				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(nubase, nu2);
		}
		
		nu1 = nu1->next;
	}
}

int BKE_vfont_select_get(Object *ob, int *r_start, int *r_end)
{
	Curve *cu = ob->data;
	EditFont *ef = cu->editfont;
	int start, end, direction;
	
	if ((ob->type != OB_FONT) || (ef == NULL)) return 0;

	BLI_assert(ef->len >= 0);
	BLI_assert(ef->selstart >= 0 && ef->selstart <= ef->len + 1);
	BLI_assert(ef->selend   >= 0 && ef->selend   <= ef->len + 1);
	BLI_assert(ef->pos      >= 0 && ef->pos      <= ef->len);

	if (ef->selstart == 0) {
		return 0;
	}

	if (ef->selstart <= ef->selend) {
		start = ef->selstart - 1;
		end = ef->selend - 1;
		direction = 1;
	}
	else {
		start = ef->selend;
		end = ef->selstart - 2;
		direction = -1;
	}

	if (start == end + 1) {
		return 0;
	}
	else {
		BLI_assert(start < end + 1);
		*r_start = start;
		*r_end = end;
		return direction;
	}
}

void BKE_vfont_select_clamp(Object *ob)
{
	Curve *cu = ob->data;
	EditFont *ef = cu->editfont;

	BLI_assert((ob->type == OB_FONT) && ef);

	CLAMP_MAX(ef->pos,      ef->len);
	CLAMP_MAX(ef->selstart, ef->len + 1);
	CLAMP_MAX(ef->selend,   ef->len);
}

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;
	}
}

static void textbox_scale(TextBox *tb_dst, const TextBox *tb_src, float scale)
{
	tb_dst->x = tb_src->x * scale;
	tb_dst->y = tb_src->y * scale;
	tb_dst->w = tb_src->w * scale;
	tb_dst->h = tb_src->h * scale;
}

/**
 * Used for storing per-line data for alignment & wrapping.
 */
struct TempLineInfo {
	float x_min;      /* left margin */
	float x_max;      /* right margin */
	int   char_nr;    /* number of characters */
	int   wspace_nr;  /* number of whitespaces of line */
};

bool BKE_vfont_to_curve_ex(Main *bmain, Object *ob, int mode, ListBase *r_nubase,
                           const wchar_t **r_text, int *r_text_len, bool *r_text_free,
                           struct CharTrans **r_chartransdata)
{
	Curve *cu = ob->data;
	EditFont *ef = cu->editfont;
	EditFontSelBox *selboxes = NULL;
	VFont *vfont, *oldvfont;
	VFontData *vfd = NULL;
	CharInfo *info = NULL, *custrinfo;
	TextBox tb_scale;
	bool use_textbox;
	VChar *che;
	struct CharTrans *chartransdata = NULL, *ct;
	/* Text at the beginning of the last used text-box (use for y-axis alignment). */
	int i_textbox = 0;
	struct TempLineInfo *lineinfo;
	float *f, xof, yof, xtrax, linedist;
	float twidth, maxlen = 0;
	int i, slen, j;
	int curbox;
	int selstart, selend;
	int cnr = 0, lnr = 0, wsnr = 0;
	const wchar_t *mem;
	wchar_t ascii;
	bool ok = false;
	const float xof_scale = cu->xof / cu->fsize;
	const float yof_scale = cu->yof / cu->fsize;

#define MARGIN_X_MIN (xof_scale + tb_scale.x)
#define MARGIN_Y_MIN (yof_scale + tb_scale.y)

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

	BLI_assert(ob->type == OB_FONT);

	/* Set font data */
	vfont = cu->vfont;

	if (cu->str == NULL) return ok;
	if (vfont == NULL) return ok;

	vfd = vfont_get_data(bmain, vfont);

	/* The VFont Data can not be found */
	if (!vfd) return ok;
	
	if (ef) {
		slen = ef->len;
		mem = ef->textbuf;
		custrinfo = ef->textbufinfo;
	}
	else {
		wchar_t *mem_tmp;
		slen = cu->len_wchar;

		/* Create unicode string */
		mem_tmp = MEM_mallocN(((slen + 1) * sizeof(wchar_t)), "convertedmem");

		BLI_strncpy_wchar_from_utf8(mem_tmp, cu->str, slen + 1);

		if (cu->strinfo == NULL) {  /* old file */
			cu->strinfo = MEM_callocN((slen + 4) * sizeof(CharInfo), "strinfo compat");
		}
		custrinfo = cu->strinfo;

		mem = mem_tmp;
	}

	if (cu->tb == NULL)
		cu->tb = MEM_callocN(MAXTEXTBOX * sizeof(TextBox), "TextBox compat");

	if (ef) {
		if (ef->selboxes)
			MEM_freeN(ef->selboxes);

		if (BKE_vfont_select_get(ob, &selstart, &selend)) {
			ef->selboxes_len = (selend - selstart) + 1;
			ef->selboxes = MEM_callocN(ef->selboxes_len * sizeof(EditFontSelBox), "font selboxes");
		}
		else {
			ef->selboxes_len = 0;
			ef->selboxes = NULL;
		}

		selboxes = ef->selboxes;
	}

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

	/* We assume the worst case: 1 character per line (is freed at end anyway) */
	lineinfo = MEM_mallocN(sizeof(*lineinfo) * (slen * 2 + 1), "lineinfo");
	
	linedist = cu->linedist;
	
	curbox = 0;
	textbox_scale(&tb_scale, &cu->tb[curbox], 1.0f / cu->fsize);
	use_textbox = (tb_scale.w != 0.0f);


	xof = MARGIN_X_MIN;
	yof = MARGIN_Y_MIN;

	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);
	}

	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) {
				info->flag |= CU_CHINFO_SMALLCAPS_CHECK;
			}
		}

		vfont = which_vfont(cu, info);

		if (vfont == NULL) break;

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

		/* VFont Data for VFont couldn't be found */
		if (!vfd) {
			MEM_freeN(chartransdata);
			chartransdata = NULL;
			MEM_freeN(lineinfo);
			goto finally;
		}

		if (!ELEM(ascii, '\n', '\0')) {
			BLI_rw_mutex_lock(&vfont_rwlock, THREAD_LOCK_READ);
			che = find_vfont_char(vfd, ascii);
			BLI_rw_mutex_unlock(&vfont_rwlock);

			/*
			 * The character wasn't in the current curve base so load it
			 * But if the font is built-in then do not try loading since
			 * whole font is in the memory already
			 */
			if (che == NULL && BKE_vfont_is_builtin(vfont) == false) {
				BLI_rw_mutex_lock(&vfont_rwlock, THREAD_LOCK_WRITE);
				/* Check it once again, char might have been already load
				 * between previous BLI_rw_mutex_unlock() and this BLI_rw_mutex_lock().
				 *
				 * Such a check should not be a bottleneck since it wouldn't
				 * happen often once all the chars are load.
				 */
				if ((che = find_vfont_char(vfd, ascii)) == NULL) {
					che = BLI_vfontchar_from_freetypefont(vfont, ascii);
				}
				BLI_rw_mutex_unlock(&vfont_rwlock);
			}
		}
		else {
			che = NULL;
		}

		twidth = char_width(cu, che, info);

		/* Calculate positions */
		if ((tb_scale.w != 0.0f) &&
		    (ct->dobreak == 0) &&
		    (((xof - tb_scale.x) + twidth) > xof_scale + tb_scale.w))
		{
			//		fprintf(stderr, "linewidth exceeded: %c%c%c...\n", mem[i], mem[i+1], mem[i+2]);
			for (j = i; j && (mem[j] != '\n') && (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 == 0 || ct->dobreak) {
			ct->xof = xof;
			ct->yof = yof;
			ct->linenr = lnr;
			ct->charnr = cnr;

			yof -= linedist;

			lineinfo[lnr].x_min     = (xof - xtrax) - tb_scale.x;
			lineinfo[lnr].x_max     = tb_scale.w;
			lineinfo[lnr].char_nr   = cnr;
			lineinfo[lnr].wspace_nr = wsnr;

			CLAMP_MIN(maxlen, lineinfo[lnr].x_min);

			if ((tb_scale.h != 0.0f) &&
			    (cu->totbox > (curbox + 1)) &&
			    ((-(yof - tb_scale.y)) > (tb_scale.h - linedist) - yof_scale))
			{
				i_textbox = i + 1;
				maxlen = 0;
				curbox++;

				textbox_scale(&tb_scale, &cu->tb[curbox], 1.0f / cu->fsize);

				yof = MARGIN_Y_MIN;
			}

			/* XXX, has been unused for years, need to check if this is useful, r4613 r5282 - campbell */
#if 0
			if (ascii == '\n')
				xof = xof_scale;
			else
				xof = MARGIN_X_MIN;
#else
			xof = MARGIN_X_MIN;
#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 - MARGIN_X_MIN + 0.01f);
			tabfac = 2.0f * ceilf(tabfac / 2.0f);
			xof = MARGIN_X_MIN + tabfac;
		}
		else {
			EditFontSelBox *sb = NULL;
			float wsfac;

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

			if (selboxes && (i >= selstart) && (i <= selend)) {
				sb = &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;
	for (i = 0; i <= slen; i++) {
		ascii = mem[i];
		ct = &chartransdata[i];
		if (ascii == '\n' || ct->dobreak) cu->lines++;
	}

	/* linedata is now: width of line */

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

		if (cu->spacemode == CU_ALIGN_X_RIGHT) {
			struct TempLineInfo *li;

			for (i = 0, li = lineinfo; i < lnr; i++, li++) {
				li->x_min = (li->x_max - li->x_min) + xof_scale;
			}

			for (i = 0; i <= slen; i++) {
				ct->xof += lineinfo[ct->linenr].x_min;
				ct++;
			}
		}
		else if (cu->spacemode == CU_ALIGN_X_MIDDLE) {
			struct TempLineInfo *li;

			for (i = 0, li = lineinfo; i < lnr; i++, li++) {
				li->x_min = ((li->x_max - li->x_min) + xof_scale) / 2.0f;
			}

			for (i = 0; i <= slen; i++) {
				ct->xof += lineinfo[ct->linenr].x_min;
				ct++;
			}
		}
		else if ((cu->spacemode == CU_ALIGN_X_FLUSH) && use_textbox) {
			struct TempLineInfo *li;

			for (i = 0, li = lineinfo; i < lnr; i++, li++) {
				li->x_min = ((li->x_max - li->x_min) + xof_scale);

				if (li->char_nr > 1) {
					li->x_min /= (float)(li->char_nr - 1);
				}
			}
			for (i = 0; i <= slen; i++) {
				for (j = i; (!ELEM(mem[j], '\0', '\n')) && (chartransdata[j].dobreak == 0) && (j < slen); j++) {
					/* do nothing */
				}

//				if ((mem[j] != '\n') && (mem[j])) {
				ct->xof += ct->charnr * lineinfo[ct->linenr].x_min;
//				}
				ct++;
			}
		}
		else if ((cu->spacemode == CU_ALIGN_X_JUSTIFY) && use_textbox) {
			float curofs = 0.0f;
			for (i = 0; i <= slen; i++) {
				for (j = i;
				     (mem[j]) && (mem[j] != '\n') && (chartransdata[j].dobreak == 0) && (j < slen);
				     j++)
				{
					/* pass */
				}

				if ((mem[j] != '\n') &&
				    ((chartransdata[j].dobreak != 0)))
				{
					if (mem[i] == ' ') {
						struct TempLineInfo *li;

						li = &lineinfo[ct->linenr];
						curofs += ((li->x_max - li->x_min) + xof_scale) / (float)li->wspace_nr;
					}
					ct->xof += curofs;
				}
				if (mem[i] == '\n' || chartransdata[i].dobreak) curofs = 0;
				ct++;
			}
		}
	}

	/* top-baseline is default, in this case, do nothing */
	if (cu->align_y != CU_ALIGN_Y_TOP_BASELINE) {
		if (tb_scale.h != 0.0f) {
			/* top and top-baseline are the same when text-boxes are used */
			if (cu->align_y != CU_ALIGN_Y_TOP && i_textbox < slen) {
				/* all previous textboxes are 'full', only align the last used text-box */
				float yoff;
				int lines;
				struct CharTrans *ct_last, *ct_textbox;

				ct_last = chartransdata + slen - 1;
				ct_textbox = chartransdata + i_textbox;

				lines = ct_last->linenr - ct_textbox->linenr + 1;
				if (mem[slen - 1] == '\n') {
					lines++;
				}

				if (cu->align_y == CU_ALIGN_Y_BOTTOM) {
					yoff = (lines * linedist) - tb_scale.h;
				}
				else if (cu->align_y == CU_ALIGN_Y_CENTER) {
					yoff = 0.5f * ((lines * linedist) - tb_scale.h);
				}

				ct = ct_textbox;
				for (i = i_textbox - 1; i < slen; i++) {
					ct->yof += yoff;
					ct++;
				}
			}
		}
		else {
			/* non text-box case handled separately */
			ct = chartransdata;
			float yoff;

			if (cu->align_y == CU_ALIGN_Y_TOP) {
				yoff = -linedist;
			}
			else if (cu->align_y == CU_ALIGN_Y_BOTTOM) {
				yoff = (lnr - 1.0f) * linedist;
			}
			else if (cu->align_y == CU_ALIGN_Y_CENTER) {
				yoff = (lnr - 2.0f) * linedist * 0.5f;
			}

			for (i = 0; i <= slen; i++) {
				ct->yof += yoff;
				ct++;
			}
		}
	}

	MEM_freeN(lineinfo);

	/* TEXT ON CURVE */
	/* Note: Only OB_CURVE objects could have a path  */
	if (cu->textoncurve && cu->textoncurve->type == OB_CURVE) {
		BLI_assert(cu->textoncurve->curve_cache != NULL);
		if (cu->textoncurve->curve_cache->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 * cu->textoncurve->curve_cache->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_ALIGN_X_RIGHT) {
					timeofs = 1.0f - distfac;
				}
				else if (cu->spacemode == CU_ALIGN_X_MIDDLE) {
					timeofs = (1.0f - distfac) / 2.0f;
				}
				else if (cu->spacemode == CU_ALIGN_X_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 */
				info = &custrinfo[i];
				ascii = mem[i];
				if (info->flag & CU_CHINFO_SMALLCAPS_CHECK) {
					ascii = towupper(ascii);
				}

				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 - atan2f(rotvec[1], rotvec[0]);

				si = sinf(ct->rot);
				co = cosf(ct->rot);

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

				if (selboxes && (i >= selstart) && (i <= selend)) {
					EditFontSelBox *sb;
					sb = &selboxes[i - selstart];
					sb->rot = -ct->rot;
				}
			}
			/* null character is always zero width, no need to iterate over it */
			chartransdata[slen] = chartransdata[slen - 1];
		}
	}

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

	if (mode == FO_CURSUP || mode == FO_CURSDOWN || mode == FO_PAGEUP || mode == FO_PAGEDOWN) {
		ct = &chartransdata[ef->pos];

		if ((mode == FO_CURSUP || mode == FO_PAGEUP) && ct->linenr == 0) {
			/* pass */
		}
		else if ((mode == FO_CURSDOWN || mode == FO_PAGEDOWN) && ct->linenr == lnr) {
			/* pass */
		}
		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 */
			ef->pos = 0;
			ct = chartransdata;
			for (i = 0; i < slen; i++) {
				if (ct->linenr == lnr) {
					if ((ct->charnr == cnr) || ((ct + 1)->charnr == 0)) {
						break;
					}
				}
				else if (ct->linenr > lnr) {
					break;
				}
				ef->pos++;
				ct++;
			}
		}
	}
	
	/* cursor first */
	if (ef) {
		float si, co;
		
		ct = &chartransdata[ef->pos];
		si = sinf(ct->rot);
		co = cosf(ct->rot);

		f = ef->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);
		
	}

	if (mode == FO_SELCHANGE) {
		MEM_freeN(chartransdata);
		chartransdata = NULL;
		goto finally;
	}

	if (mode == FO_EDIT) {
		/* make nurbdata */
		BKE_nurbList_free(r_nubase);
		
		ct = chartransdata;
		for (i = 0; i < slen; i++) {
			unsigned int cha = (unsigned int) mem[i];
			info = &(custrinfo[i]);

			if (info->flag & CU_CHINFO_SMALLCAPS_CHECK) {
				cha = towupper(cha);
			}

			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')
				buildchar(bmain, cu, r_nubase, cha, info, ct->xof, ct->yof, ct->rot, i);

			if ((info->flag & CU_CHINFO_UNDERLINE) && (cha != '\n')) {
				float ulwidth, uloverlap = 0.0f;
				rctf rect;

				if ((i < (slen - 1)) && (mem[i + 1] != '\n') &&
				    ((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 = (twidth * (1.0f + (info->kern / 40.0f))) + uloverlap;

				rect.xmin = ct->xof;
				rect.xmax = rect.xmin + ulwidth;

				rect.ymin = ct->yof;
				rect.ymax = rect.ymin - cu->ulheight;

				build_underline(cu, r_nubase,
				                &rect, cu->ulpos - 0.05f,
				                ct->rot, i, info->mat_nr);
			}
			ct++;
		}
	}

	ok = true;

finally:

	{
		if (r_text) {
			*r_text = mem;
			*r_text_len = slen;
			*r_text_free = (ef == NULL);
		}
		else {
			if (ef == NULL) {
				MEM_freeN((void *)mem);
			}
		}
	}

	if (chartransdata) {
		if (ok && r_chartransdata) {
			*r_chartransdata = chartransdata;
		}
		else {
			MEM_freeN(chartransdata);
		}
	}

	return ok;

#undef MARGIN_X_MIN
#undef MARGIN_Y_MIN
}


bool BKE_vfont_to_curve_nubase(Main *bmain, Object *ob, int mode, ListBase *r_nubase)
{
	BLI_assert(ob->type == OB_FONT);

	return BKE_vfont_to_curve_ex(bmain, ob, mode, r_nubase,
	                             NULL, NULL, NULL, NULL);
}

bool BKE_vfont_to_curve(Main *bmain, Object *ob, int mode)
{
	Curve *cu = ob->data;

	return BKE_vfont_to_curve_ex(bmain, ob, mode, &cu->nurb, NULL, NULL, NULL, NULL);
}


/* -------------------------------------------------------------------- */

/** \name VFont Clipboard
 * \{ */

static struct {
	wchar_t *text_buffer;
	CharInfo *info_buffer;
	size_t len_wchar;
	size_t len_utf8;
} g_vfont_clipboard = {NULL};

void BKE_vfont_clipboard_free(void)
{
	MEM_SAFE_FREE(g_vfont_clipboard.text_buffer);
	MEM_SAFE_FREE(g_vfont_clipboard.info_buffer);
	g_vfont_clipboard.len_wchar = 0;
	g_vfont_clipboard.len_utf8 = 0;
}

void BKE_vfont_clipboard_set(const wchar_t *text_buf, const CharInfo *info_buf, const size_t len)
{
	wchar_t *text;
	CharInfo *info;

	/* clean previous buffers*/
	BKE_vfont_clipboard_free();

	text = MEM_mallocN((len + 1) * sizeof(wchar_t), __func__);
	if (text == NULL) {
		return;
	}

	info = MEM_mallocN(len * sizeof(CharInfo), __func__);
	if (info == NULL) {
		MEM_freeN(text);
		return;
	}

	memcpy(text, text_buf, len * sizeof(wchar_t));
	text[len] = '\0';
	memcpy(info, info_buf, len * sizeof(CharInfo));

	/* store new buffers */
	g_vfont_clipboard.text_buffer = text;
	g_vfont_clipboard.info_buffer = info;
	g_vfont_clipboard.len_utf8 = BLI_wstrlen_utf8(text);
	g_vfont_clipboard.len_wchar = len;
}

void BKE_vfont_clipboard_get(
        wchar_t **r_text_buf, CharInfo **r_info_buf,
        size_t *r_len_utf8, size_t *r_len_wchar)
{
	if (r_text_buf) {
		*r_text_buf = g_vfont_clipboard.text_buffer;
	}

	if (r_info_buf) {
		*r_info_buf = g_vfont_clipboard.info_buffer;
	}

	if (r_len_wchar) {
		*r_len_wchar = g_vfont_clipboard.len_wchar;
	}

	if (r_len_utf8) {
		*r_len_utf8 = g_vfont_clipboard.len_utf8;
	}
}

/** \} */