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Diffstat (limited to '.venv/lib/python3.12/site-packages/PIL/PalmImagePlugin.py')
| -rw-r--r-- | .venv/lib/python3.12/site-packages/PIL/PalmImagePlugin.py | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/PIL/PalmImagePlugin.py b/.venv/lib/python3.12/site-packages/PIL/PalmImagePlugin.py new file mode 100644 index 00000000..b3324537 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/PIL/PalmImagePlugin.py @@ -0,0 +1,232 @@ +# +# The Python Imaging Library. +# $Id$ +# + +## +# Image plugin for Palm pixmap images (output only). +## +from __future__ import annotations + +from typing import IO + +from . import Image, ImageFile +from ._binary import o8 +from ._binary import o16be as o16b + +# fmt: off +_Palm8BitColormapValues = ( + (255, 255, 255), (255, 204, 255), (255, 153, 255), (255, 102, 255), + (255, 51, 255), (255, 0, 255), (255, 255, 204), (255, 204, 204), + (255, 153, 204), (255, 102, 204), (255, 51, 204), (255, 0, 204), + (255, 255, 153), (255, 204, 153), (255, 153, 153), (255, 102, 153), + (255, 51, 153), (255, 0, 153), (204, 255, 255), (204, 204, 255), + (204, 153, 255), (204, 102, 255), (204, 51, 255), (204, 0, 255), + (204, 255, 204), (204, 204, 204), (204, 153, 204), (204, 102, 204), + (204, 51, 204), (204, 0, 204), (204, 255, 153), (204, 204, 153), + (204, 153, 153), (204, 102, 153), (204, 51, 153), (204, 0, 153), + (153, 255, 255), (153, 204, 255), (153, 153, 255), (153, 102, 255), + (153, 51, 255), (153, 0, 255), (153, 255, 204), (153, 204, 204), + (153, 153, 204), (153, 102, 204), (153, 51, 204), (153, 0, 204), + (153, 255, 153), (153, 204, 153), (153, 153, 153), (153, 102, 153), + (153, 51, 153), (153, 0, 153), (102, 255, 255), (102, 204, 255), + (102, 153, 255), (102, 102, 255), (102, 51, 255), (102, 0, 255), + (102, 255, 204), (102, 204, 204), (102, 153, 204), (102, 102, 204), + (102, 51, 204), (102, 0, 204), (102, 255, 153), (102, 204, 153), + (102, 153, 153), (102, 102, 153), (102, 51, 153), (102, 0, 153), + (51, 255, 255), (51, 204, 255), (51, 153, 255), (51, 102, 255), + (51, 51, 255), (51, 0, 255), (51, 255, 204), (51, 204, 204), + (51, 153, 204), (51, 102, 204), (51, 51, 204), (51, 0, 204), + (51, 255, 153), (51, 204, 153), (51, 153, 153), (51, 102, 153), + (51, 51, 153), (51, 0, 153), (0, 255, 255), (0, 204, 255), + (0, 153, 255), (0, 102, 255), (0, 51, 255), (0, 0, 255), + (0, 255, 204), (0, 204, 204), (0, 153, 204), (0, 102, 204), + (0, 51, 204), (0, 0, 204), (0, 255, 153), (0, 204, 153), + (0, 153, 153), (0, 102, 153), (0, 51, 153), (0, 0, 153), + (255, 255, 102), (255, 204, 102), (255, 153, 102), (255, 102, 102), + (255, 51, 102), (255, 0, 102), (255, 255, 51), (255, 204, 51), + (255, 153, 51), (255, 102, 51), (255, 51, 51), (255, 0, 51), + (255, 255, 0), (255, 204, 0), (255, 153, 0), (255, 102, 0), + (255, 51, 0), (255, 0, 0), (204, 255, 102), (204, 204, 102), + (204, 153, 102), (204, 102, 102), (204, 51, 102), (204, 0, 102), + (204, 255, 51), (204, 204, 51), (204, 153, 51), (204, 102, 51), + (204, 51, 51), (204, 0, 51), (204, 255, 0), (204, 204, 0), + (204, 153, 0), (204, 102, 0), (204, 51, 0), (204, 0, 0), + (153, 255, 102), (153, 204, 102), (153, 153, 102), (153, 102, 102), + (153, 51, 102), (153, 0, 102), (153, 255, 51), (153, 204, 51), + (153, 153, 51), (153, 102, 51), (153, 51, 51), (153, 0, 51), + (153, 255, 0), (153, 204, 0), (153, 153, 0), (153, 102, 0), + (153, 51, 0), (153, 0, 0), (102, 255, 102), (102, 204, 102), + (102, 153, 102), (102, 102, 102), (102, 51, 102), (102, 0, 102), + (102, 255, 51), (102, 204, 51), (102, 153, 51), (102, 102, 51), + (102, 51, 51), (102, 0, 51), (102, 255, 0), (102, 204, 0), + (102, 153, 0), (102, 102, 0), (102, 51, 0), (102, 0, 0), + (51, 255, 102), (51, 204, 102), (51, 153, 102), (51, 102, 102), + (51, 51, 102), (51, 0, 102), (51, 255, 51), (51, 204, 51), + (51, 153, 51), (51, 102, 51), (51, 51, 51), (51, 0, 51), + (51, 255, 0), (51, 204, 0), (51, 153, 0), (51, 102, 0), + (51, 51, 0), (51, 0, 0), (0, 255, 102), (0, 204, 102), + (0, 153, 102), (0, 102, 102), (0, 51, 102), (0, 0, 102), + (0, 255, 51), (0, 204, 51), (0, 153, 51), (0, 102, 51), + (0, 51, 51), (0, 0, 51), (0, 255, 0), (0, 204, 0), + (0, 153, 0), (0, 102, 0), (0, 51, 0), (17, 17, 17), + (34, 34, 34), (68, 68, 68), (85, 85, 85), (119, 119, 119), + (136, 136, 136), (170, 170, 170), (187, 187, 187), (221, 221, 221), + (238, 238, 238), (192, 192, 192), (128, 0, 0), (128, 0, 128), + (0, 128, 0), (0, 128, 128), (0, 0, 0), (0, 0, 0), + (0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0), + (0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0), + (0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0), + (0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0), + (0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0), + (0, 0, 0), (0, 0, 0), (0, 0, 0), (0, 0, 0)) +# fmt: on + + +# so build a prototype image to be used for palette resampling +def build_prototype_image() -> Image.Image: + image = Image.new("L", (1, len(_Palm8BitColormapValues))) + image.putdata(list(range(len(_Palm8BitColormapValues)))) + palettedata: tuple[int, ...] = () + for colormapValue in _Palm8BitColormapValues: + palettedata += colormapValue + palettedata += (0, 0, 0) * (256 - len(_Palm8BitColormapValues)) + image.putpalette(palettedata) + return image + + +Palm8BitColormapImage = build_prototype_image() + +# OK, we now have in Palm8BitColormapImage, +# a "P"-mode image with the right palette +# +# -------------------------------------------------------------------- + +_FLAGS = {"custom-colormap": 0x4000, "is-compressed": 0x8000, "has-transparent": 0x2000} + +_COMPRESSION_TYPES = {"none": 0xFF, "rle": 0x01, "scanline": 0x00} + + +# +# -------------------------------------------------------------------- + +## +# (Internal) Image save plugin for the Palm format. + + +def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None: + if im.mode == "P": + # we assume this is a color Palm image with the standard colormap, + # unless the "info" dict has a "custom-colormap" field + + rawmode = "P" + bpp = 8 + version = 1 + + elif im.mode == "L": + if im.encoderinfo.get("bpp") in (1, 2, 4): + # this is 8-bit grayscale, so we shift it to get the high-order bits, + # and invert it because + # Palm does grayscale from white (0) to black (1) + bpp = im.encoderinfo["bpp"] + maxval = (1 << bpp) - 1 + shift = 8 - bpp + im = im.point(lambda x: maxval - (x >> shift)) + elif im.info.get("bpp") in (1, 2, 4): + # here we assume that even though the inherent mode is 8-bit grayscale, + # only the lower bpp bits are significant. + # We invert them to match the Palm. + bpp = im.info["bpp"] + maxval = (1 << bpp) - 1 + im = im.point(lambda x: maxval - (x & maxval)) + else: + msg = f"cannot write mode {im.mode} as Palm" + raise OSError(msg) + + # we ignore the palette here + im._mode = "P" + rawmode = f"P;{bpp}" + version = 1 + + elif im.mode == "1": + # monochrome -- write it inverted, as is the Palm standard + rawmode = "1;I" + bpp = 1 + version = 0 + + else: + msg = f"cannot write mode {im.mode} as Palm" + raise OSError(msg) + + # + # make sure image data is available + im.load() + + # write header + + cols = im.size[0] + rows = im.size[1] + + rowbytes = int((cols + (16 // bpp - 1)) / (16 // bpp)) * 2 + transparent_index = 0 + compression_type = _COMPRESSION_TYPES["none"] + + flags = 0 + if im.mode == "P" and "custom-colormap" in im.info: + assert im.palette is not None + flags = flags & _FLAGS["custom-colormap"] + colormapsize = 4 * 256 + 2 + colormapmode = im.palette.mode + colormap = im.getdata().getpalette() + else: + colormapsize = 0 + + if "offset" in im.info: + offset = (rowbytes * rows + 16 + 3 + colormapsize) // 4 + else: + offset = 0 + + fp.write(o16b(cols) + o16b(rows) + o16b(rowbytes) + o16b(flags)) + fp.write(o8(bpp)) + fp.write(o8(version)) + fp.write(o16b(offset)) + fp.write(o8(transparent_index)) + fp.write(o8(compression_type)) + fp.write(o16b(0)) # reserved by Palm + + # now write colormap if necessary + + if colormapsize > 0: + fp.write(o16b(256)) + for i in range(256): + fp.write(o8(i)) + if colormapmode == "RGB": + fp.write( + o8(colormap[3 * i]) + + o8(colormap[3 * i + 1]) + + o8(colormap[3 * i + 2]) + ) + elif colormapmode == "RGBA": + fp.write( + o8(colormap[4 * i]) + + o8(colormap[4 * i + 1]) + + o8(colormap[4 * i + 2]) + ) + + # now convert data to raw form + ImageFile._save( + im, fp, [ImageFile._Tile("raw", (0, 0) + im.size, 0, (rawmode, rowbytes, 1))] + ) + + if hasattr(fp, "flush"): + fp.flush() + + +# +# -------------------------------------------------------------------- + +Image.register_save("Palm", _save) + +Image.register_extension("Palm", ".palm") + +Image.register_mime("Palm", "image/palm") |