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M4.68: BMP export at 1 to 32 bits, Windows or OS/2, with RLE and flipped rows

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document.export {format: "bmp"} writes BMP through the raster export path:
depth 1 (black and white), 4 or 8 (a palette by reduction and dither,
optionally RLE4/RLE8), 16 (5-5-5), 24 or 32 (with alpha, a version 4
header); colorModel rgb or gray; fileFormat windows or os2 (a core header);
flipRows writes top-down rows (a negative height). Impossible combinations
are refused as bad params. Export As offers it with the bmpOptions dialog,
which keeps its choices writable together; BMP moves from read-only to read
and write (tests that used .bmp as the unwritable format now use .dwg).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
bflatastic
2026-10-05 15:24:35 +07:00
co-authored by Claude Opus 5.5
parent d01b2fbd8a
commit f2fc8782c7
19 changed files with 668 additions and 44 deletions
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docs/control-protocol.md
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@@ -366,7 +366,10 @@ EMF and WMF: Export As… lists both formats (`file.exportAs {format: "emf"}` or
dialog, so `ui.dialog.confirm` asks for the path and writes the file (one per artboard with Use Artboards). Open and
Place read `.emf` and `.wmf`; a paste of `image/emf` from a system clipboard service runs `clipboard.importEmf`.
TIFF Options: Export As… with the TIFF format (`file.exportAs {format: "tiff"}`, then the save dialog) opens
`tiffOptions`: the raster rows of PNG Options (`ppi`, `background`, `antiAlias`), then `colorModel` (`rgb`, `cmyk`,
`gray`; a CMYK document starts on `cmyk`), `byteOrder` (`little`, `big`), `lzw` and `embedIcc`. `ui.dialog.set` the
fields and `ui.dialog.confirm` writes the file(s) with `document.export`.
TIFF and BMP Options: Export As… with the TIFF or BMP format (`file.exportAs {format: "tiff"}`, then
the save dialog) opens `tiffOptions` or `bmpOptions`: the raster rows of PNG Options (`ppi`,
`background`, `antiAlias`), then TIFF's `colorModel` (`rgb`, `cmyk`, `gray`; a CMYK document starts on `cmyk`),
`byteOrder` (`little`, `big`), `lzw` and `embedIcc`; BMP's `colorModel` (`rgb`, `gray`), `fileFormat` (`windows`,
`os2`), `depth` (1, 4, 8, 16, 24, 32), `reduction` and `dither` (4 and 8 bits), `rle` and `flipRows`. The BMP dialog keeps its choices writable together (OS/2 falls back to 24 bits and turns RLE and flipped
rows off; RLE turns flipped rows off). `ui.dialog.set` the fields and `ui.dialog.confirm` writes the file(s) with
`document.export`.