On 01/25/2015 08:52 PM, Keith Packard wrote:
Aaron Plattner <[email protected]> writes:
This series is a counterproposal to Nicolas's patch "dummy: Add support for
custom resolutions (RandR 1.2)" [1]
This version allows using xrandr's --fb option to resize the screen rather than
having to try to create fake modes that pass validation against made-up hardware
constraints. It also allows resizing the framebuffer all the way up to
32767x34767 (assuming malloc succeeds).
You might check out my 'RandR monitors' proposal - that lets you control
the set of output areas independent from the crtc set; xf86-video-dummy
could then have *no* CRTCs and still have as many 'monitors' as you
like.
Patch 6/6 in this series *does* set it up with zero crtcs. The
xf86CrtcConfigInit and xf86CrtcSetSizeRange functions are somewhat
misnamed in that they don't actually require a crtc to operate.
We need something like this for 4k MST monitor support; seems like it'll
be useful for yet another use here. I've posted the protocol revisions,
and there's a complete implementation in the library, protocol headers
and X server all ready for code review as well.
Yeah, I do need to look into that proposal still. But I think this is
useful (in particular for 32k coordinate testing by using randr to
switch dynamically between 32747x500 and 500x32767) independently.
-- Aaron
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