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/* Pango
* thai-xft.c:
*
* Copyright (C) 1999 Red Hat Software
* Author: Owen Taylor <otaylor@redhat.com>
*
* Copyright (C) 2002 NECTEC
* Author: Theppitak Karoonboonyanan <thep@links.nectec.or.th>
*
* Copyright (c) 1996-2000 by Sun Microsystems, Inc.
* Author: Chookij Vanatham <Chookij.Vanatham@Eng.Sun.COM>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include <glib.h>
#include "pango-engine.h"
#include "pangofc-font.h"
#include "thai-shaper.h"
#include "thai-ot.h"
/* No extra fields needed */
typedef PangoEngineShape ThaiEngineFc;
typedef PangoEngineShapeClass ThaiEngineFcClass ;
#define SCRIPT_ENGINE_NAME "ThaiScriptEngineFc"
#define RENDER_TYPE PANGO_RENDER_TYPE_FC
/* We handle the range U+0e01 to U+0e5b exactly
*/
static PangoEngineScriptInfo thai_scripts[] = {
{ PANGO_SCRIPT_THAI, "*" },
{ PANGO_SCRIPT_LAO, "*" },
};
static PangoEngineInfo script_engines[] = {
{
SCRIPT_ENGINE_NAME,
PANGO_ENGINE_TYPE_SHAPE,
RENDER_TYPE,
thai_scripts, G_N_ELEMENTS(thai_scripts)
}
};
/* TIS-to-Unicode glyph maps for characters 0x80-0xff
*/
static const int tis620_0[128] = {
/**/ 0, 0, 0, 0, 0, 0, 0, 0,
/**/ 0, 0, 0, 0, 0, 0, 0, 0,
/**/ 0, 0, 0, 0, 0, 0, 0, 0,
/**/ 0, 0, 0, 0, 0, 0, 0, 0,
0x0020, 0x0e01, 0x0e02, 0x0e03, 0x0e04, 0x0e05, 0x0e06, 0x0e07,
0x0e08, 0x0e09, 0x0e0a, 0x0e0b, 0x0e0c, 0x0e0d, 0x0e0e, 0x0e0f,
0x0e10, 0x0e11, 0x0e12, 0x0e13, 0x0e14, 0x0e15, 0x0e16, 0x0e17,
0x0e18, 0x0e19, 0x0e1a, 0x0e1b, 0x0e1c, 0x0e1d, 0x0e1e, 0x0e1f,
0x0e20, 0x0e21, 0x0e22, 0x0e23, 0x0e24, 0x0e25, 0x0e26, 0x0e27,
0x0e28, 0x0e29, 0x0e2a, 0x0e2b, 0x0e2c, 0x0e2d, 0x0e2e, 0x0e2f,
0x0e30, 0x0e31, 0x0e32, 0x0e33, 0x0e34, 0x0e35, 0x0e36, 0x0e37,
0x0e38, 0x0e39, 0x0e3a, 0, 0, 0, 0, 0x0e3f,
0x0e40, 0x0e41, 0x0e42, 0x0e43, 0x0e44, 0x0e45, 0x0e46, 0x0e47,
0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e4c, 0x0e4d, 0x0e4e, 0x0e4f,
0x0e50, 0x0e51, 0x0e52, 0x0e53, 0x0e54, 0x0e55, 0x0e56, 0x0e57,
0x0e58, 0x0e59, 0x0e5a, 0x0e5b, 0, 0, 0, 0
};
static const int tis620_1[128] = {
0xf89e, 0, 0, 0xf88c, 0xf88f, 0xf892, 0xf895, 0xf898,
0xf88b, 0xf88e, 0xf891, 0xf894, 0xf897, 0, 0, 0xf899,
0xf89a, 0, 0xf884, 0xf889, 0xf885, 0xf886, 0xf887, 0xf888,
0xf88a, 0xf88d, 0xf890, 0xf893, 0xf896, 0, 0, 0,
/**/ 0, 0x0e01, 0x0e02, 0x0e03, 0x0e04, 0x0e05, 0x0e06, 0x0e07,
0x0e08, 0x0e09, 0x0e0a, 0x0e0b, 0x0e0c, 0x0e0d, 0x0e0e, 0x0e0f,
0x0e10, 0x0e11, 0x0e12, 0x0e13, 0x0e14, 0x0e15, 0x0e16, 0x0e17,
0x0e18, 0x0e19, 0x0e1a, 0x0e1b, 0x0e1c, 0x0e1d, 0x0e1e, 0x0e1f,
0x0e20, 0x0e21, 0x0e22, 0x0e23, 0x0e24, 0x0e25, 0x0e26, 0x0e27,
0x0e28, 0x0e29, 0x0e2a, 0x0e2b, 0x0e2c, 0x0e2d, 0x0e2e, 0x0e2f,
0x0e30, 0x0e31, 0x0e32, 0x0e33, 0x0e34, 0x0e35, 0x0e36, 0x0e37,
0x0e38, 0x0e39, 0x0e3a, 0, 0, 0, 0, 0x0e3f,
0x0e40, 0x0e41, 0x0e42, 0x0e43, 0x0e44, 0x0e45, 0x0e46, 0x0e47,
0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e4c, 0x0e4d, 0, 0x0e4f,
0x0e50, 0x0e51, 0x0e52, 0x0e53, 0x0e54, 0x0e55, 0x0e56, 0x0e57,
0x0e58, 0x0e59, 0, 0, 0xf89b, 0xf89c, 0xf89d, 0
};
static const int tis620_2[128] = {
0xf700, 0xf701, 0xf702, 0xf703, 0xf704, 0x2026, 0xf705, 0xf706,
0xf707, 0xf708, 0xf709, 0xf70a, 0xf70b, 0xf70c, 0xf70d, 0xf70e,
0xf70f, 0x2018, 0x2019, 0x201c, 0x201d, 0x2022, 0x2013, 0x2014,
0xf710, 0xf711, 0xf712, 0xf713, 0xf714, 0xf715, 0xf716, 0xf717,
0x00a0, 0x0e01, 0x0e02, 0x0e03, 0x0e04, 0x0e05, 0x0e06, 0x0e07,
0x0e08, 0x0e09, 0x0e0a, 0x0e0b, 0x0e0c, 0x0e0d, 0x0e0e, 0x0e0f,
0x0e10, 0x0e11, 0x0e12, 0x0e13, 0x0e14, 0x0e15, 0x0e16, 0x0e17,
0x0e18, 0x0e19, 0x0e1a, 0x0e1b, 0x0e1c, 0x0e1d, 0x0e1e, 0x0e1f,
0x0e20, 0x0e21, 0x0e22, 0x0e23, 0x0e24, 0x0e25, 0x0e26, 0x0e27,
0x0e28, 0x0e29, 0x0e2a, 0x0e2b, 0x0e2c, 0x0e2d, 0x0e2e, 0x0e2f,
0x0e30, 0x0e31, 0x0e32, 0x0e33, 0x0e34, 0x0e35, 0x0e36, 0x0e37,
0x0e38, 0x0e39, 0x0e3a, 0, 0, 0, 0, 0x0e3f,
0x0e40, 0x0e41, 0x0e42, 0x0e43, 0x0e44, 0x0e45, 0x0e46, 0x0e47,
0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e4c, 0x0e4d, 0x0e4e, 0x0e4f,
0x0e50, 0x0e51, 0x0e52, 0x0e53, 0x0e54, 0x0e55, 0x0e56, 0x0e57,
0x0e58, 0x0e59, 0x0e5a, 0x0e5b, 0xf718, 0xf719, 0xf71a, 0
};
static const int lao_0[128] = {
/**/ 0, 0, 0, 0, 0, 0, 0, 0,
/**/ 0, 0, 0, 0, 0, 0, 0, 0,
/**/ 0, 0, 0, 0, 0, 0, 0, 0,
/**/ 0, 0, 0, 0, 0, 0, 0, 0,
0x0020, 0x0e81, 0x0e82, 0, 0x0e84, 0, 0, 0x0e87,
0x0e88, 0, 0x0e8a, 0, 0, 0x0e8d, 0, 0,
0, 0, 0, 0, 0x0e94, 0x0e95, 0x0e96, 0x0e97,
/**/ 0, 0x0e99, 0x0e9a, 0x0e9b, 0x0e9c, 0x0e9d, 0x0e9e, 0x0e9f,
/**/ 0, 0x0ea1, 0x0ea2, 0x0ea3, 0, 0x0ea5, 0, 0x0ea7,
/**/ 0, 0, 0x0eaa, 0x0eab, 0, 0x0ead, 0x0eae, 0x0eaf,
0x0eb0, 0x0eb1, 0x0eb2, 0x0eb3, 0x0eb4, 0x0eb5, 0x0eb6, 0x0eb7,
0x0eb8, 0x0eb9, 0, 0x0ebb, 0x0ebc, 0x0ebd, 0, 0,
0x0ec0, 0x0ec1, 0x0ec2, 0x0ec3, 0x0ec4, 0, 0x0ec6, 0,
0x0ec8, 0x0ec9, 0x0eca, 0x0ecb, 0x0ecc, 0x0ecd, 0, 0,
0x0ed0, 0x0ed1, 0x0ed2, 0x0ed3, 0x0ed4, 0x0ed5, 0x0ed6, 0x0ed7,
0x0ed8, 0x0ed9, 0, 0, 0x0edc, 0x0edd, 0, 0
};
static int
contain_glyphs(PangoFont *font, const int glyph_map[128])
{
PangoFcFont *fc_font = (PangoFcFont *)font;
unsigned char c;
for (c = 0; c < 0x80; c++)
{
if (glyph_map[c])
{
if (!pango_fc_font_has_char (fc_font, glyph_map[c]))
return 0;
}
}
return 1;
}
/* Returns a structure with information we will use to rendering given the
* #PangoFont. This is computed once per font and cached for later retrieval.
*/
ThaiFontInfo *
thai_get_font_info (PangoFont *font)
{
ThaiFontInfo *font_info;
GQuark info_id = g_quark_from_string ("thai-font-info");
font_info = g_object_get_qdata (G_OBJECT (font), info_id);
if (!font_info)
{
/* No cached information not found, so we need to compute it
* from scratch
*/
font_info = g_new (ThaiFontInfo, 1);
font_info->font = font;
/* detect font set by determining availibility of OT ruleset & glyphs */
if (thai_ot_get_ruleset (font))
font_info->font_set = THAI_FONT_TIS;
else if (contain_glyphs(font, tis620_2))
font_info->font_set = THAI_FONT_TIS_WIN;
else if (contain_glyphs(font, tis620_1))
font_info->font_set = THAI_FONT_TIS_MAC;
else
font_info->font_set = THAI_FONT_TIS;
g_object_set_qdata_full (G_OBJECT (font), info_id, font_info, (GDestroyNotify)g_free);
}
return font_info;
}
static gunichar
get_glyph_index_tis (ThaiFontInfo *font_info, guchar c)
{
if (!(c & 0x80))
return lao_0[c];
switch (font_info->font_set) {
case THAI_FONT_TIS: return tis620_0[c & 0x7f];
case THAI_FONT_TIS_MAC: return tis620_1[c & 0x7f];
case THAI_FONT_TIS_WIN: return tis620_2[c & 0x7f];
default: return 0;
}
}
PangoGlyph
thai_get_glyph_tis (ThaiFontInfo *font_info, guchar c)
{
return thai_get_glyph_uni (font_info, get_glyph_index_tis (font_info, c));
}
PangoGlyph
thai_make_glyph_tis (ThaiFontInfo *font_info, guchar c)
{
return thai_make_glyph_uni (font_info, get_glyph_index_tis (font_info, c));
}
PangoGlyph
thai_get_glyph_uni (ThaiFontInfo *font_info, gunichar uc)
{
return pango_fc_font_get_glyph ((PangoFcFont *)font_info->font, uc);
}
PangoGlyph
thai_make_glyph_uni (ThaiFontInfo *font_info, gunichar uc)
{
PangoGlyph result;
PangoFcFont *fc_font = (PangoFcFont *)font_info->font;
result = pango_fc_font_get_glyph (fc_font, uc);
if (result)
return result;
else
return pango_fc_font_get_unknown_glyph (fc_font, uc);
}
PangoGlyph
thai_make_unknown_glyph (ThaiFontInfo *font_info, gunichar uc)
{
return pango_fc_font_get_unknown_glyph ((PangoFcFont *)font_info->font, uc);
}
static void
thai_engine_fc_class_init (PangoEngineShapeClass *class)
{
class->script_shape = thai_engine_shape;
}
PANGO_ENGINE_SHAPE_DEFINE_TYPE (ThaiEngineFc, thai_engine_fc,
thai_engine_fc_class_init, NULL);
void
PANGO_MODULE_ENTRY(init) (GTypeModule *module)
{
thai_engine_fc_register_type (module);
}
void
PANGO_MODULE_ENTRY(exit) (void)
{
}
void
PANGO_MODULE_ENTRY(list) (PangoEngineInfo **engines,
int *n_engines)
{
*engines = script_engines;
*n_engines = G_N_ELEMENTS (script_engines);
}
PangoEngine *
PANGO_MODULE_ENTRY(create) (const char *id)
{
if (!strcmp (id, SCRIPT_ENGINE_NAME))
return g_object_new (thai_engine_fc_type, NULL);
else
return NULL;
}
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