two version of R2R are here HEAD master

1 files changed, 145 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/PIL/SunImagePlugin.py b/.venv/lib/python3.12/site-packages/PIL/SunImagePlugin.py
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+++ b/.venv/lib/python3.12/site-packages/PIL/SunImagePlugin.py
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+#
+# The Python Imaging Library.
+# $Id$
+#
+# Sun image file handling
+#
+# History:
+# 1995-09-10 fl   Created
+# 1996-05-28 fl   Fixed 32-bit alignment
+# 1998-12-29 fl   Import ImagePalette module
+# 2001-12-18 fl   Fixed palette loading (from Jean-Claude Rimbault)
+#
+# Copyright (c) 1997-2001 by Secret Labs AB
+# Copyright (c) 1995-1996 by Fredrik Lundh
+#
+# See the README file for information on usage and redistribution.
+#
+from __future__ import annotations
+
+from . import Image, ImageFile, ImagePalette
+from ._binary import i32be as i32
+
+
+def _accept(prefix: bytes) -> bool:
+    return len(prefix) >= 4 and i32(prefix) == 0x59A66A95
+
+
+##
+# Image plugin for Sun raster files.
+
+
+class SunImageFile(ImageFile.ImageFile):
+    format = "SUN"
+    format_description = "Sun Raster File"
+
+    def _open(self) -> None:
+        # The Sun Raster file header is 32 bytes in length
+        # and has the following format:
+
+        #     typedef struct _SunRaster
+        #     {
+        #         DWORD MagicNumber;      /* Magic (identification) number */
+        #         DWORD Width;            /* Width of image in pixels */
+        #         DWORD Height;           /* Height of image in pixels */
+        #         DWORD Depth;            /* Number of bits per pixel */
+        #         DWORD Length;           /* Size of image data in bytes */
+        #         DWORD Type;             /* Type of raster file */
+        #         DWORD ColorMapType;     /* Type of color map */
+        #         DWORD ColorMapLength;   /* Size of the color map in bytes */
+        #     } SUNRASTER;
+
+        assert self.fp is not None
+
+        # HEAD
+        s = self.fp.read(32)
+        if not _accept(s):
+            msg = "not an SUN raster file"
+            raise SyntaxError(msg)
+
+        offset = 32
+
+        self._size = i32(s, 4), i32(s, 8)
+
+        depth = i32(s, 12)
+        # data_length = i32(s, 16)   # unreliable, ignore.
+        file_type = i32(s, 20)
+        palette_type = i32(s, 24)  # 0: None, 1: RGB, 2: Raw/arbitrary
+        palette_length = i32(s, 28)
+
+        if depth == 1:
+            self._mode, rawmode = "1", "1;I"
+        elif depth == 4:
+            self._mode, rawmode = "L", "L;4"
+        elif depth == 8:
+            self._mode = rawmode = "L"
+        elif depth == 24:
+            if file_type == 3:
+                self._mode, rawmode = "RGB", "RGB"
+            else:
+                self._mode, rawmode = "RGB", "BGR"
+        elif depth == 32:
+            if file_type == 3:
+                self._mode, rawmode = "RGB", "RGBX"
+            else:
+                self._mode, rawmode = "RGB", "BGRX"
+        else:
+            msg = "Unsupported Mode/Bit Depth"
+            raise SyntaxError(msg)
+
+        if palette_length:
+            if palette_length > 1024:
+                msg = "Unsupported Color Palette Length"
+                raise SyntaxError(msg)
+
+            if palette_type != 1:
+                msg = "Unsupported Palette Type"
+                raise SyntaxError(msg)
+
+            offset = offset + palette_length
+            self.palette = ImagePalette.raw("RGB;L", self.fp.read(palette_length))
+            if self.mode == "L":
+                self._mode = "P"
+                rawmode = rawmode.replace("L", "P")
+
+        # 16 bit boundaries on stride
+        stride = ((self.size[0] * depth + 15) // 16) * 2
+
+        # file type: Type is the version (or flavor) of the bitmap
+        # file. The following values are typically found in the Type
+        # field:
+        # 0000h Old
+        # 0001h Standard
+        # 0002h Byte-encoded
+        # 0003h RGB format
+        # 0004h TIFF format
+        # 0005h IFF format
+        # FFFFh Experimental
+
+        # Old and standard are the same, except for the length tag.
+        # byte-encoded is run-length-encoded
+        # RGB looks similar to standard, but RGB byte order
+        # TIFF and IFF mean that they were converted from T/IFF
+        # Experimental means that it's something else.
+        # (https://www.fileformat.info/format/sunraster/egff.htm)
+
+        if file_type in (0, 1, 3, 4, 5):
+            self.tile = [
+                ImageFile._Tile("raw", (0, 0) + self.size, offset, (rawmode, stride))
+            ]
+        elif file_type == 2:
+            self.tile = [
+                ImageFile._Tile("sun_rle", (0, 0) + self.size, offset, rawmode)
+            ]
+        else:
+            msg = "Unsupported Sun Raster file type"
+            raise SyntaxError(msg)
+
+
+#
+# registry
+
+
+Image.register_open(SunImageFile.format, SunImageFile, _accept)
+
+Image.register_extension(SunImageFile.format, ".ras")