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Diffstat (limited to 'PIL/PcfFontFile.py')
| -rw-r--r-- | PIL/PcfFontFile.py | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/PIL/PcfFontFile.py b/PIL/PcfFontFile.py deleted file mode 100644 index 9a689b2..0000000 --- a/PIL/PcfFontFile.py +++ /dev/null @@ -1,256 +0,0 @@ -# -# THIS IS WORK IN PROGRESS -# -# The Python Imaging Library -# $Id: PcfFontFile.py 2134 2004-10-06 08:55:20Z fredrik $ -# -# portable compiled font file parser -# -# history: -# 1997-08-19 fl created -# 2003-09-13 fl fixed loading of unicode fonts -# -# Copyright (c) 1997-2003 by Secret Labs AB. -# Copyright (c) 1997-2003 by Fredrik Lundh. -# -# See the README file for information on usage and redistribution. -# - -import Image -import FontFile - -import string - -# -------------------------------------------------------------------- -# declarations - -PCF_MAGIC = 0x70636601 # "\x01fcp" - -PCF_PROPERTIES = (1<<0) -PCF_ACCELERATORS = (1<<1) -PCF_METRICS = (1<<2) -PCF_BITMAPS = (1<<3) -PCF_INK_METRICS = (1<<4) -PCF_BDF_ENCODINGS = (1<<5) -PCF_SWIDTHS = (1<<6) -PCF_GLYPH_NAMES = (1<<7) -PCF_BDF_ACCELERATORS = (1<<8) - -BYTES_PER_ROW = [ - lambda bits: ((bits+7) >> 3), - lambda bits: ((bits+15) >> 3) & ~1, - lambda bits: ((bits+31) >> 3) & ~3, - lambda bits: ((bits+63) >> 3) & ~7, -] - - -def l16(c): - return ord(c[0]) + (ord(c[1])<<8) -def l32(c): - return ord(c[0]) + (ord(c[1])<<8) + (ord(c[2])<<16) + (ord(c[3])<<24) - -def b16(c): - return ord(c[1]) + (ord(c[0])<<8) -def b32(c): - return ord(c[3]) + (ord(c[2])<<8) + (ord(c[1])<<16) + (ord(c[0])<<24) - -def sz(s, o): - return s[o:string.index(s, "\0", o)] - -## -# Font file plugin for the X11 PCF format. - -class PcfFontFile(FontFile.FontFile): - - name = "name" - - def __init__(self, fp): - - magic = l32(fp.read(4)) - if magic != PCF_MAGIC: - raise SyntaxError, "not a PCF file" - - FontFile.FontFile.__init__(self) - - count = l32(fp.read(4)) - self.toc = {} - for i in range(count): - type = l32(fp.read(4)) - self.toc[type] = l32(fp.read(4)), l32(fp.read(4)), l32(fp.read(4)) - - self.fp = fp - - self.info = self._load_properties() - - metrics = self._load_metrics() - bitmaps = self._load_bitmaps(metrics) - encoding = self._load_encoding() - - # - # create glyph structure - - for ch in range(256): - ix = encoding[ch] - if ix is not None: - x, y, l, r, w, a, d, f = metrics[ix] - glyph = (w, 0), (l, d-y, x+l, d), (0, 0, x, y), bitmaps[ix] - self.glyph[ch] = glyph - - def _getformat(self, tag): - - format, size, offset = self.toc[tag] - - fp = self.fp - fp.seek(offset) - - format = l32(fp.read(4)) - - if format & 4: - i16, i32 = b16, b32 - else: - i16, i32 = l16, l32 - - return fp, format, i16, i32 - - def _load_properties(self): - - # - # font properties - - properties = {} - - fp, format, i16, i32 = self._getformat(PCF_PROPERTIES) - - nprops = i32(fp.read(4)) - - # read property description - p = [] - for i in range(nprops): - p.append((i32(fp.read(4)), ord(fp.read(1)), i32(fp.read(4)))) - if nprops & 3: - fp.seek(4 - (nprops & 3), 1) # pad - - data = fp.read(i32(fp.read(4))) - - for k, s, v in p: - k = sz(data, k) - if s: - v = sz(data, v) - properties[k] = v - - return properties - - def _load_metrics(self): - - # - # font metrics - - metrics = [] - - fp, format, i16, i32 = self._getformat(PCF_METRICS) - - append = metrics.append - - if (format & 0xff00) == 0x100: - - # "compressed" metrics - for i in range(i16(fp.read(2))): - left = ord(fp.read(1)) - 128 - right = ord(fp.read(1)) - 128 - width = ord(fp.read(1)) - 128 - ascent = ord(fp.read(1)) - 128 - descent = ord(fp.read(1)) - 128 - xsize = right - left - ysize = ascent + descent - append( - (xsize, ysize, left, right, width, - ascent, descent, 0) - ) - - else: - - # "jumbo" metrics - for i in range(i32(fp.read(4))): - left = i16(fp.read(2)) - right = i16(fp.read(2)) - width = i16(fp.read(2)) - ascent = i16(fp.read(2)) - descent = i16(fp.read(2)) - attributes = i16(fp.read(2)) - xsize = right - left - ysize = ascent + descent - append( - (xsize, ysize, left, right, width, - ascent, descent, attributes) - ) - - return metrics - - def _load_bitmaps(self, metrics): - - # - # bitmap data - - bitmaps = [] - - fp, format, i16, i32 = self._getformat(PCF_BITMAPS) - - nbitmaps = i32(fp.read(4)) - - if nbitmaps != len(metrics): - raise IOError, "Wrong number of bitmaps" - - offsets = [] - for i in range(nbitmaps): - offsets.append(i32(fp.read(4))) - - bitmapSizes = [] - for i in range(4): - bitmapSizes.append(i32(fp.read(4))) - - byteorder = format & 4 # non-zero => MSB - bitorder = format & 8 # non-zero => MSB - padindex = format & 3 - - bitmapsize = bitmapSizes[padindex] - offsets.append(bitmapsize) - - data = fp.read(bitmapsize) - - pad = BYTES_PER_ROW[padindex] - mode = "1;R" - if bitorder: - mode = "1" - - for i in range(nbitmaps): - x, y, l, r, w, a, d, f = metrics[i] - b, e = offsets[i], offsets[i+1] - bitmaps.append( - Image.fromstring("1", (x, y), data[b:e], "raw", mode, pad(x)) - ) - - return bitmaps - - def _load_encoding(self): - - # map character code to bitmap index - encoding = [None] * 256 - - fp, format, i16, i32 = self._getformat(PCF_BDF_ENCODINGS) - - firstCol, lastCol = i16(fp.read(2)), i16(fp.read(2)) - firstRow, lastRow = i16(fp.read(2)), i16(fp.read(2)) - - default = i16(fp.read(2)) - - nencoding = (lastCol - firstCol + 1) * (lastRow - firstRow + 1) - - for i in range(nencoding): - encodingOffset = i16(fp.read(2)) - if encodingOffset != 0xFFFF: - try: - encoding[i+firstCol] = encodingOffset - except IndexError: - break # only load ISO-8859-1 glyphs - - return encoding |