two version of R2R are hereHEADmaster

1 files changed, 254 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/PIL/PcfFontFile.py b/.venv/lib/python3.12/site-packages/PIL/PcfFontFile.py
new file mode 100644
index 00000000..0d1968b1
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/PIL/PcfFontFile.py
@@ -0,0 +1,254 @@
+#
+# 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.
+#
+from __future__ import annotations
+
+import io
+from typing import BinaryIO, Callable
+
+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: list[Callable[[int], int]] = [
+    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: bytes, o: int) -> bytes:
+    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: BinaryIO, charset_encoding: str = "iso8859-1"):
+        self.charset_encoding = charset_encoding
+
+        magic = l32(fp.read(4))
+        if magic != PCF_MAGIC:
+            msg = "not a PCF file"
+            raise SyntaxError(msg)
+
+        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:
+                (
+                    xsize,
+                    ysize,
+                    left,
+                    right,
+                    width,
+                    ascent,
+                    descent,
+                    attributes,
+                ) = metrics[ix]
+                self.glyph[ch] = (
+                    (width, 0),
+                    (left, descent - ysize, xsize + left, descent),
+                    (0, 0, xsize, ysize),
+                    bitmaps[ix],
+                )
+
+    def _getformat(
+        self, tag: int
+    ) -> tuple[BinaryIO, int, Callable[[bytes], int], Callable[[bytes], int]]:
+        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) -> dict[bytes, bytes | int]:
+        #
+        # font properties
+
+        properties = {}
+
+        fp, format, i16, i32 = self._getformat(PCF_PROPERTIES)
+
+        nprops = i32(fp.read(4))
+
+        # read property description
+        p = [(i32(fp.read(4)), i8(fp.read(1)), i32(fp.read(4))) for _ in range(nprops)]
+
+        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:
+            property_value: bytes | int = sz(data, v) if s else v
+            properties[sz(data, k)] = property_value
+
+        return properties
+
+    def _load_metrics(self) -> list[tuple[int, int, int, int, int, int, int, int]]:
+        #
+        # font metrics
+
+        metrics: list[tuple[int, int, int, int, int, int, int, int]] = []
+
+        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: list[tuple[int, int, int, int, int, int, int, int]]
+    ) -> list[Image.Image]:
+        #
+        # bitmap data
+
+        fp, format, i16, i32 = self._getformat(PCF_BITMAPS)
+
+        nbitmaps = i32(fp.read(4))
+
+        if nbitmaps != len(metrics):
+            msg = "Wrong number of bitmaps"
+            raise OSError(msg)
+
+        offsets = [i32(fp.read(4)) for _ in range(nbitmaps)]
+
+        bitmap_sizes = [i32(fp.read(4)) for _ in range(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"
+
+        bitmaps = []
+        for i in range(nbitmaps):
+            xsize, ysize = metrics[i][:2]
+            b, e = offsets[i : i + 2]
+            bitmaps.append(
+                Image.frombytes("1", (xsize, ysize), data[b:e], "raw", mode, pad(xsize))
+            )
+
+        return bitmaps
+
+    def _load_encoding(self) -> list[int | None]:
+        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: list[int | None] = [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