/usr/lib/python2.7/dist-packages/pyglet/font/freetype_lib.py is in python-pyglet 1.1.4.dfsg-3.
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# pyglet
# Copyright (c) 2006-2008 Alex Holkner
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name of pyglet nor the names of its
# contributors may be used to endorse or promote products
# derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ----------------------------------------------------------------------------
'''
'''
__docformat__ = 'restructuredtext'
__version__ = '$Id: freetype_lib.py 2496 2009-08-19 01:17:30Z benjamin.coder.smith $'
from ctypes import *
from base import FontException
import pyglet.lib
_libfreetype = pyglet.lib.load_library('freetype')
_font_data = {}
def _get_function(name, argtypes, rtype):
try:
func = getattr(_libfreetype, name)
func.argtypes = argtypes
func.restype = rtype
return func
except AttributeError, e:
raise ImportError(e)
FT_Done_FreeType = _get_function('FT_Done_FreeType', [c_void_p], None)
FT_Done_Face = _get_function('FT_Done_Face', [c_void_p], None)
class FT_LibraryRec(Structure):
_fields_ = [
('dummy', c_int),
]
def __del__(self):
global _library
try:
FT_Done_FreeType(byref(self))
_library = None
except:
pass
FT_Library = POINTER(FT_LibraryRec)
class FT_Glyph_Metrics(Structure):
_fields_ = [
('width', c_long),
('height', c_long),
('horiBearingX', c_long),
('horiBearingY', c_long),
('horiAdvance', c_long),
('vertBearingX', c_long),
('vertBearingY', c_long),
('vertAdvance', c_long),
]
def dump(self):
for (name, type) in self._fields_:
print 'FT_Glyph_Metrics', name, `getattr(self, name)`
class FT_Generic(Structure):
_fields_ = [('data', c_void_p), ('finalizer', c_void_p)]
class FT_BBox(Structure):
_fields_ = [('xMin', c_long), ('yMin', c_long), ('xMax', c_long),
('yMax', c_long)]
class FT_Vector(Structure):
_fields_ = [('x', c_long), ('y', c_long)]
class FT_Bitmap(Structure):
_fields_ = [
('rows', c_int),
('width', c_int),
('pitch', c_int),
# declaring buffer as c_char_p confuses ctypes, poor dear
('buffer', POINTER(c_ubyte)),
('num_grays', c_short),
('pixel_mode', c_ubyte),
('palette_mode', c_char),
('palette', c_void_p),
]
class FT_Outline(Structure):
_fields_ = [
('n_contours', c_short), # number of contours in glyph
('n_points', c_short), # number of points in the glyph
('points', POINTER(FT_Vector)), # the outline's points
('tags', c_char_p), # the points flags
('contours', POINTER(c_short)), # the contour end points
('flags', c_int), # outline masks
]
class FT_GlyphSlotRec(Structure):
_fields_ = [
('library', FT_Library),
('face', c_void_p),
('next', c_void_p),
('reserved', c_uint),
('generic', FT_Generic),
('metrics', FT_Glyph_Metrics),
('linearHoriAdvance', c_long),
('linearVertAdvance', c_long),
('advance', FT_Vector),
('format', c_int),
('bitmap', FT_Bitmap),
('bitmap_left', c_int),
('bitmap_top', c_int),
('outline', FT_Outline),
('num_subglyphs', c_uint),
('subglyphs', c_void_p),
('control_data', c_void_p),
('control_len', c_long),
('lsb_delta', c_long),
('rsb_delta', c_long),
('other', c_void_p),
('internal', c_void_p),
]
FT_GlyphSlot = POINTER(FT_GlyphSlotRec)
class FT_Size_Metrics(Structure):
_fields_ = [
('x_ppem', c_ushort), # horizontal pixels per EM
('y_ppem', c_ushort), # vertical pixels per EM
('x_scale', c_long), # two scales used to convert font units
('y_scale', c_long), # to 26.6 frac. pixel coordinates
('ascender', c_long), # ascender in 26.6 frac. pixels
('descender', c_long), # descender in 26.6 frac. pixels
('height', c_long), # text height in 26.6 frac. pixels
('max_advance', c_long), # max horizontal advance, in 26.6 pixels
]
class FT_SizeRec(Structure):
_fields_ = [
('face', c_void_p),
('generic', FT_Generic),
('metrics', FT_Size_Metrics),
('internal', c_void_p),
]
FT_Size = POINTER(FT_SizeRec)
class FT_Bitmap_Size(Structure):
_fields_ = [
('height', c_ushort),
('width', c_ushort),
('size', c_long),
('x_ppem', c_long),
('y_ppem', c_long),
]
# face_flags values
FT_FACE_FLAG_SCALABLE = 1 << 0
FT_FACE_FLAG_FIXED_SIZES = 1 << 1
FT_FACE_FLAG_FIXED_WIDTH = 1 << 2
FT_FACE_FLAG_SFNT = 1 << 3
FT_FACE_FLAG_HORIZONTAL = 1 << 4
FT_FACE_FLAG_VERTICAL = 1 << 5
FT_FACE_FLAG_KERNING = 1 << 6
FT_FACE_FLAG_FAST_GLYPHS = 1 << 7
FT_FACE_FLAG_MULTIPLE_MASTERS = 1 << 8
FT_FACE_FLAG_GLYPH_NAMES = 1 << 9
FT_FACE_FLAG_EXTERNAL_STREAM = 1 << 10
FT_FACE_FLAG_HINTER = 1 << 11
class FT_FaceRec(Structure):
_fields_ = [
('num_faces', c_long),
('face_index', c_long),
('face_flags', c_long),
('style_flags', c_long),
('num_glyphs', c_long),
('family_name', c_char_p),
('style_name', c_char_p),
('num_fixed_sizes', c_int),
('available_sizes', POINTER(FT_Bitmap_Size)),
('num_charmaps', c_int),
('charmaps', c_void_p),
('generic', FT_Generic),
('bbox', FT_BBox),
('units_per_EM', c_ushort),
('ascender', c_short),
('descender', c_short),
('height', c_short),
('max_advance_width', c_short),
('max_advance_height', c_short),
('underline_position', c_short),
('underline_thickness', c_short),
('glyph', FT_GlyphSlot),
('size', FT_Size),
('charmap', c_void_p),
('driver', c_void_p),
('memory', c_void_p),
('stream', c_void_p),
('sizes_list_head', c_void_p),
('sizes_list_tail', c_void_p),
('autohint', FT_Generic),
('extensions', c_void_p),
('internal', c_void_p),
]
def dump(self):
for (name, type) in self._fields_:
print 'FT_FaceRec', name, `getattr(self, name)`
def has_kerning(self):
return self.face_flags & FT_FACE_FLAG_KERNING
FT_Face = POINTER(FT_FaceRec)
class Error(Exception):
def __init__(self, message, errcode):
self.message = message
self.errcode = errcode
def __str__(self):
return '%s: %s (%s)'%(self.__class__.__name__, self.message,
self._ft_errors.get(self.errcode, 'unknown error'))
_ft_errors = {
0x00: "no error" ,
0x01: "cannot open resource" ,
0x02: "unknown file format" ,
0x03: "broken file" ,
0x04: "invalid FreeType version" ,
0x05: "module version is too low" ,
0x06: "invalid argument" ,
0x07: "unimplemented feature" ,
0x08: "broken table" ,
0x09: "broken offset within table" ,
0x10: "invalid glyph index" ,
0x11: "invalid character code" ,
0x12: "unsupported glyph image format" ,
0x13: "cannot render this glyph format" ,
0x14: "invalid outline" ,
0x15: "invalid composite glyph" ,
0x16: "too many hints" ,
0x17: "invalid pixel size" ,
0x20: "invalid object handle" ,
0x21: "invalid library handle" ,
0x22: "invalid module handle" ,
0x23: "invalid face handle" ,
0x24: "invalid size handle" ,
0x25: "invalid glyph slot handle" ,
0x26: "invalid charmap handle" ,
0x27: "invalid cache manager handle" ,
0x28: "invalid stream handle" ,
0x30: "too many modules" ,
0x31: "too many extensions" ,
0x40: "out of memory" ,
0x41: "unlisted object" ,
0x51: "cannot open stream" ,
0x52: "invalid stream seek" ,
0x53: "invalid stream skip" ,
0x54: "invalid stream read" ,
0x55: "invalid stream operation" ,
0x56: "invalid frame operation" ,
0x57: "nested frame access" ,
0x58: "invalid frame read" ,
0x60: "raster uninitialized" ,
0x61: "raster corrupted" ,
0x62: "raster overflow" ,
0x63: "negative height while rastering" ,
0x70: "too many registered caches" ,
0x80: "invalid opcode" ,
0x81: "too few arguments" ,
0x82: "stack overflow" ,
0x83: "code overflow" ,
0x84: "bad argument" ,
0x85: "division by zero" ,
0x86: "invalid reference" ,
0x87: "found debug opcode" ,
0x88: "found ENDF opcode in execution stream" ,
0x89: "nested DEFS" ,
0x8A: "invalid code range" ,
0x8B: "execution context too long" ,
0x8C: "too many function definitions" ,
0x8D: "too many instruction definitions" ,
0x8E: "SFNT font table missing" ,
0x8F: "horizontal header (hhea, table missing" ,
0x90: "locations (loca, table missing" ,
0x91: "name table missing" ,
0x92: "character map (cmap, table missing" ,
0x93: "horizontal metrics (hmtx, table missing" ,
0x94: "PostScript (post, table missing" ,
0x95: "invalid horizontal metrics" ,
0x96: "invalid character map (cmap, format" ,
0x97: "invalid ppem value" ,
0x98: "invalid vertical metrics" ,
0x99: "could not find context" ,
0x9A: "invalid PostScript (post, table format" ,
0x9B: "invalid PostScript (post, table" ,
0xA0: "opcode syntax error" ,
0xA1: "argument stack underflow" ,
0xA2: "ignore" ,
0xB0: "`STARTFONT' field missing" ,
0xB1: "`FONT' field missing" ,
0xB2: "`SIZE' field missing" ,
0xB3: "`CHARS' field missing" ,
0xB4: "`STARTCHAR' field missing" ,
0xB5: "`ENCODING' field missing" ,
0xB6: "`BBX' field missing" ,
0xB7: "`BBX' too big" ,
}
FT_LOAD_RENDER = 0x4
FT_F26Dot6 = c_long
FT_Init_FreeType = _get_function('FT_Init_FreeType',
[POINTER(FT_Library)], c_int)
FT_New_Memory_Face = _get_function('FT_New_Memory_Face',
[FT_Library, POINTER(c_byte), c_long, c_long, POINTER(FT_Face)], c_int)
FT_New_Face = _get_function('FT_New_Face',
[FT_Library, c_char_p, c_long, POINTER(FT_Face)], c_int)
FT_Set_Pixel_Sizes = _get_function('FT_Set_Pixel_Sizes',
[FT_Face, c_uint, c_uint], c_int)
FT_Set_Char_Size = _get_function('FT_Set_Char_Size',
[FT_Face, FT_F26Dot6, FT_F26Dot6, c_uint, c_uint], c_int)
FT_Load_Glyph = _get_function('FT_Load_Glyph',
[FT_Face, c_uint, c_int32], c_int)
FT_Get_Char_Index = _get_function('FT_Get_Char_Index',
[FT_Face, c_ulong], c_uint)
FT_Load_Char = _get_function('FT_Load_Char',
[FT_Face, c_ulong, c_int], c_int)
FT_Get_Kerning = _get_function('FT_Get_Kerning',
[FT_Face, c_uint, c_uint, c_uint, POINTER(FT_Vector)], c_int)
# SFNT interface
class FT_SfntName(Structure):
_fields_ = [
('platform_id', c_ushort),
('encoding_id', c_ushort),
('language_id', c_ushort),
('name_id', c_ushort),
('string', POINTER(c_byte)),
('string_len', c_uint)
]
FT_Get_Sfnt_Name_Count = _get_function('FT_Get_Sfnt_Name_Count',
[FT_Face], c_uint)
FT_Get_Sfnt_Name = _get_function('FT_Get_Sfnt_Name',
[FT_Face, c_uint, POINTER(FT_SfntName)], c_int)
TT_PLATFORM_MICROSOFT = 3
TT_MS_ID_UNICODE_CS = 1
TT_NAME_ID_COPYRIGHT = 0
TT_NAME_ID_FONT_FAMILY = 1
TT_NAME_ID_FONT_SUBFAMILY = 2
TT_NAME_ID_UNIQUE_ID = 3
TT_NAME_ID_FULL_NAME = 4
TT_NAME_ID_VERSION_STRING = 5
TT_NAME_ID_PS_NAME = 6
TT_NAME_ID_TRADEMARK = 7
TT_NAME_ID_MANUFACTURER = 8
TT_NAME_ID_DESIGNER = 9
TT_NAME_ID_DESCRIPTION = 10
TT_NAME_ID_VENDOR_URL = 11
TT_NAME_ID_DESIGNER_URL = 12
TT_NAME_ID_LICENSE = 13
TT_NAME_ID_LICENSE_URL = 14
TT_NAME_ID_PREFERRED_FAMILY = 16
TT_NAME_ID_PREFERRED_SUBFAMILY= 17
TT_NAME_ID_MAC_FULL_NAME = 18
TT_NAME_ID_CID_FINDFONT_NAME = 20
_library = None
def ft_get_library():
global _library
if not _library:
_library = FT_Library()
error = FT_Init_FreeType(byref(_library))
if error:
raise FontException(
'an error occurred during library initialization', error)
return _library
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