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Add screen magnifier

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This adds a screen magnifier which can be controlled with the
`ZoomIn` / `ZoomOut` and `ToggleMagnify` actions.

It scales up part of the rendered framebuffer so the magnification
may end up looking blurry depending on the magnification scale.

PR #1774
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Simon Long 2024-05-15 23:07:23 +01:00 • committed by GitHub
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docs/labwc-actions.5.scd
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@ -264,6 +264,18 @@ Actions are used in menus and keyboard/mouse bindings.
decorations (including those for which the server-side titlebar has been
hidden) are not eligible for shading.
*<action name="ToggleMagnify">*
Toggle the screen magnifier on or off at the last magnification level
used.
*<action name="ZoomIn">*++
*<action name="ZoomOut">*
Increase or decrease the magnification level for the screen magnifier.
If the magnifier is currently off, ZoomIn will enable it at the lowest
magnification, equal to (1 + the magnifier increment set in the theme).
If the magnifier is on and at the lowest magnification, ZoomOut will
turn it off.
*<action name="None" />*
If used as the only action for a binding: clear an earlier defined
binding.