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/****************************************************************************\
Part of the XeTeX typesetting system
copyright (c) 1994-2006 by SIL International
written by Jonathan Kew
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL SIL INTERNATIONAL BE LIABLE FOR
ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of SIL International
shall not be used in advertising or otherwise to promote the sale,
use or other dealings in this Software without prior written
authorization from SIL International.
\****************************************************************************/
/*
* file name: XeTeXFontInst_FT2.cpp
*
* created on: 2005-10-25
* created by: Jonathan Kew
*/
#include "XeTeXFontInst_FT2.h"
#include FT_TRUETYPE_TABLES_H
#include FT_TYPE1_TABLES_H
#include FT_GLYPH_H
#include <string.h>
FT_Library gFreeTypeLibrary = 0;
XeTeXFontInst_FT2::XeTeXFontInst_FT2(const char* pathname, int index, float pointSize, LEErrorCode &status)
: XeTeXFontInst(pointSize, status)
, face(0)
, fFreeTypeOnly(false)
{
if (LE_FAILURE(status)) {
return;
}
FT_Error err;
if (!gFreeTypeLibrary) {
err = FT_Init_FreeType(&gFreeTypeLibrary);
if (err != 0) {
fprintf(stderr, "FreeType initialization failed! (%d)\n", err);
exit(1);
}
}
err = FT_New_Face(gFreeTypeLibrary, (char*)pathname, index, &face);
if (err != 0) {
status = LE_FONT_FILE_NOT_FOUND_ERROR;
return;
}
/* for non-sfnt-packaged fonts (presumably Type 1), see if there is an AFM file we can attach */
if (index == 0 && !FT_IS_SFNT(face)) {
char* afm = new char[strlen((const char*)pathname) + 5]; // room to append ".afm"
strcpy(afm, (const char*)pathname);
char* p = strrchr(afm, '.');
if (p == NULL || strlen(p) != 4 || tolower(*(p+1)) != 'p' || tolower(*(p+2)) != 'f')
strcat(afm, ".afm"); // append .afm if the extension didn't seem to be .pf[ab]
else
strcpy(p, ".afm"); // else replace extension with .afm
FT_Attach_File(face, afm); // ignore error code; AFM might not exist
delete[] afm;
fFreeTypeOnly = true;
}
initialize(status);
if (LE_FAILURE(status))
return;
char buf[20];
if (index > 0)
sprintf(buf, ":%d", index);
else
buf[0] = 0;
fFilename = new char[strlen(pathname) + 2 + strlen(buf) + 1];
sprintf(fFilename, "[%s%s]", pathname, buf);
}
XeTeXFontInst_FT2::~XeTeXFontInst_FT2()
{
if (face != 0) {
FT_Done_Face(face);
face = 0;
}
}
void XeTeXFontInst_FT2::initialize(LEErrorCode &status)
{
if (face == 0) {
status = LE_FONT_FILE_NOT_FOUND_ERROR;
return;
}
XeTeXFontInst::initialize(status);
if (LE_FAILURE(status)) {
/* font can ONLY be used via FreeType APIs, not direct table access */
fFreeTypeOnly = true;
status = LE_NO_ERROR;
/* fill in fields that XeTeXFontInst::initialize failed to get for us */
fUnitsPerEM = face->units_per_EM;
fAscent = yUnitsToPoints(face->ascender);
fDescent = yUnitsToPoints(face->descender);
// fLeading = ;
fItalicAngle = 0;
PS_FontInfoRec font_info;
if (FT_Get_PS_Font_Info(face, &font_info) == 0) {
// will return error if it wasn't a PS font
fItalicAngle = font_info.italic_angle;
}
}
return;
}
const void *XeTeXFontInst_FT2::readTable(LETag tag, le_uint32 *length) const
{
*length = 0;
FT_ULong tmpLength = 0;
FT_Error err = FT_Load_Sfnt_Table(face, tag, 0, NULL, &tmpLength);
if (err != 0)
return NULL;
void* table = LE_NEW_ARRAY(char, tmpLength);
if (table != NULL) {
err = FT_Load_Sfnt_Table(face, tag, 0, (FT_Byte*)table, &tmpLength);
if (err != 0) {
LE_DELETE_ARRAY(table);
return NULL;
}
*length = tmpLength;
}
return table;
}
void
XeTeXFontInst_FT2::getGlyphBounds(LEGlyphID gid, GlyphBBox* bbox)
{
bbox->xMin = bbox->yMin = bbox->xMax = bbox->yMax = 0.0;
FT_Error err = FT_Load_Glyph(face, gid, FT_LOAD_NO_SCALE);
if (err != 0)
return;
FT_Glyph glyph;
err = FT_Get_Glyph(face->glyph, &glyph);
if (err == 0) {
FT_BBox ft_bbox;
FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_UNSCALED, &ft_bbox);
bbox->xMin = ft_bbox.xMin * fPointSize / fUnitsPerEM;
bbox->yMin = ft_bbox.yMin * fPointSize / fUnitsPerEM;
bbox->xMax = ft_bbox.xMax * fPointSize / fUnitsPerEM;
bbox->yMax = ft_bbox.yMax * fPointSize / fUnitsPerEM;
FT_Done_Glyph(glyph);
}
}
LEGlyphID
XeTeXFontInst_FT2::mapCharToGlyph(LEUnicode32 ch) const
{
if (!fFreeTypeOnly)
return XeTeXFontInst::mapCharToGlyph(ch);
return FT_Get_Char_Index(face, ch);
}
le_uint16
XeTeXFontInst_FT2::getNumGlyphs() const
{
return face->num_glyphs;
}
void
XeTeXFontInst_FT2::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const
{
if (!fFreeTypeOnly)
XeTeXFontInst::getGlyphAdvance(glyph, advance);
else {
FT_Error err = FT_Load_Glyph(face, glyph, FT_LOAD_NO_SCALE);
if (err != 0) {
advance.fX = advance.fY = 0;
}
else {
advance.fX = fVertical ? 0 : face->glyph->metrics.horiAdvance * fPointSize / fUnitsPerEM;
advance.fY = fVertical ? face->glyph->metrics.vertAdvance * fPointSize / fUnitsPerEM : 0;
}
}
}
LEGlyphID
XeTeXFontInst_FT2::mapGlyphToIndex(const char* glyphName) const
{
LEGlyphID rval = FT_Get_Name_Index(face, const_cast<char*>(glyphName));
if (rval == 0)
rval = XeTeXFontInst::mapGlyphToIndex(glyphName);
return rval;
}
void
XeTeXFontInst_FT2::getKernPair(LEGlyphID leftGlyph, LEGlyphID rightGlyph, LEPoint &kern) const
{
FT_Vector kerning;
if (FT_Get_Kerning(face, leftGlyph, rightGlyph, FT_KERNING_UNSCALED, &kerning) == 0) {
kern.fX = kerning.x;
kern.fY = kerning.y;
}
else
kern.fX = kern.fY = 0;
}
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