diff options
Diffstat (limited to 'env/lib/python3.10/site-packages/PIL/PcfFontFile.py')
| -rw-r--r-- | env/lib/python3.10/site-packages/PIL/PcfFontFile.py | 246 |
1 files changed, 0 insertions, 246 deletions
diff --git a/env/lib/python3.10/site-packages/PIL/PcfFontFile.py b/env/lib/python3.10/site-packages/PIL/PcfFontFile.py deleted file mode 100644 index 442ac70..0000000 --- a/env/lib/python3.10/site-packages/PIL/PcfFontFile.py +++ /dev/null @@ -1,246 +0,0 @@ -# -# THIS IS WORK IN PROGRESS -# -# The Python Imaging Library -# $Id$ -# -# 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 io - -from . import FontFile, Image -from ._binary import i8 -from ._binary import i16be as b16 -from ._binary import i16le as l16 -from ._binary import i32be as b32 -from ._binary import i32le as l32 - -# -------------------------------------------------------------------- -# 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 sz(s, o): - return s[o : s.index(b"\0", o)] - - -class PcfFontFile(FontFile.FontFile): - """Font file plugin for the X11 PCF format.""" - - name = "name" - - def __init__(self, fp, charset_encoding="iso8859-1"): - - self.charset_encoding = charset_encoding - - magic = l32(fp.read(4)) - if magic != PCF_MAGIC: - raise SyntaxError("not a PCF file") - - super().__init__() - - 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, ix in enumerate(encoding): - 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)), i8(fp.read(1)), i32(fp.read(4)))) - if nprops & 3: - fp.seek(4 - (nprops & 3), io.SEEK_CUR) # 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 = i8(fp.read(1)) - 128 - right = i8(fp.read(1)) - 128 - width = i8(fp.read(1)) - 128 - ascent = i8(fp.read(1)) - 128 - descent = i8(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 OSError("Wrong number of bitmaps") - - offsets = [] - for i in range(nbitmaps): - offsets.append(i32(fp.read(4))) - - bitmap_sizes = [] - for i in range(4): - bitmap_sizes.append(i32(fp.read(4))) - - # byteorder = format & 4 # non-zero => MSB - bitorder = format & 8 # non-zero => MSB - padindex = format & 3 - - bitmapsize = bitmap_sizes[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.frombytes("1", (x, y), data[b:e], "raw", mode, pad(x))) - - return bitmaps - - def _load_encoding(self): - fp, format, i16, i32 = self._getformat(PCF_BDF_ENCODINGS) - - first_col, last_col = i16(fp.read(2)), i16(fp.read(2)) - first_row, last_row = i16(fp.read(2)), i16(fp.read(2)) - - i16(fp.read(2)) # default - - nencoding = (last_col - first_col + 1) * (last_row - first_row + 1) - - # map character code to bitmap index - encoding = [None] * min(256, nencoding) - - encoding_offsets = [i16(fp.read(2)) for _ in range(nencoding)] - - for i in range(first_col, len(encoding)): - try: - encoding_offset = encoding_offsets[ - ord(bytearray([i]).decode(self.charset_encoding)) - ] - if encoding_offset != 0xFFFF: - encoding[i] = encoding_offset - except UnicodeDecodeError: - # character is not supported in selected encoding - pass - - return encoding |