A screenshot on the clipboard didn't paste everywhere:
- macOS: the Paste menu item (which takes Cmd+V there) was enabled for text
only, so with nothing copied in the app Cmd+V did nothing; and arboard
reads the pasteboard's TIFF only. The pasteboard's types now enable Paste,
and its PNG, else TIFF, pastes as it is.
- Windows: bitmaps came through CF_BITMAP and GetDIBits, which drops alpha.
Paste now reads PNG, else CF_DIBV5, else CF_DIB, decoded with their colour
masks and tables (a BMP file header in front, which image's headerless
decoder gets wrong for masks after a BITMAPINFOHEADER), opaque when the
alpha is zero throughout as screenshots leave it, capped at 32768 px a side.
- Web: only SVG text pasted. The page's paste event now hands the first
picture or file that is art to the app (VectorcraftApp::paste_from_host),
pasted with the chord held, like the desktop's paste keys.
- Linux reads image/png already; its Paste menu item still waits for text
(no cheap way to ask arboard for a bitmap), the paste keys take one.
Bitmaps paste as embedded images at the view centre, as before.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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