File > Place reads a Word 97-2003 document (a compound file named .doc,
or one that holds a WordDocument stream) and sets its main text as area
type, as it does for .rtf and .docx files. The text comes from the
piece table, in 16-bit Unicode or compressed 8-bit pieces. Formatting
is resolved from the style sheet's default font, the paragraph style,
the character style and the direct character and paragraph properties,
and keeps the same properties the .docx reader maps.
Table cells are separated by tabs and each row is a paragraph, and a
field places as its result. Hidden and deleted text, pictures, headers,
footers, notes, comments and text boxes are left out, and the reply's
warnings name each kind of content left out or changed once. Word 6.0
and Word 95 documents, encrypted documents and documents last saved
with fast save are refused, and so are structures that lie outside
their streams.
The compound file is read with the cfb crate (MIT), which adds one
package to Cargo.lock.
File › Open and File › Place read JP2 files and raw JPEG 2000
codestreams (.jpf, .jpx, .jp2, .j2k, .j2c, .jpc) through hayro-jpeg2000,
and store the pixels as PNG. Gray, RGB, CMYK and ICC-tagged images, with
or without alpha, are converted to RGBA. Several codestreams, JPX
composition or layers, other color spaces, inconsistent or oversize
palettes, inconsistent channel definitions, oversize tile grids and
images past the pixel allowance are refused with a message before the
pixels are decoded.
The capture and display resolution boxes size the image: the box that
comes last sets each axis, and an axis without a usable value uses
72 ppi.
IccProfile::to_srgb_into converts a pixel with the cached transform and
no heap allocation.
A new reader, written from the ZSoft PCX Technical Reference Manual, decodes
the run-length encoded scan lines of 1-bit images in the header palette's
first two colors (black and white when the version has no palette or the two
colors are the same), 1-bit images in two to four planes and 4-bit images
with the header's palette (the EGA colors for versions 0 and 3), 2-bit CGA
images in the colors that the header's CGA background and palette settings
pick, 8-bit images with the 256-color palette after the image data (gray
levels without one) and 24-bit images in three planes. The image is stored as PNG at the resolution of the header's HDpi and
VDpi fields.
Open and Place list PCX, and pasting a copied .pcx file and Glass's Load
Texture… read it by its header. A file of another depth or plane count, one
cut short and one whose pixels as RGBA pass the pixel allowance are refused
with a message before its pixels are decoded. The desktop packaging does not
associate .pcx files, and no export writes them.
Docs: docs/file-format-parity.md, docs/target-app-parity.md, docs/mcp.md,
docs/releasing.md.
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