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grub_video_blit_bitmap - mouse pointer implementation.
From: |
Melki Christian (consultant) |
Subject: |
grub_video_blit_bitmap - mouse pointer implementation. |
Date: |
Tue, 24 Sep 2013 07:39:10 +0000 |
Hi.
I'm trying to draw a mouse pointer in GRUB. My problem is that the mouse is a
little bit special.
I would like to draw that bitmap last and ask damaged bitmaps to do refresh
when refreshing the mouse pointer.
But GRUB does not work that way (Or have I misunderstood? I'd prefer not to
refresh all bitmaps!)
So what I would temporarily want is a way to copy framebuffer data for the
mouse-driver to store when undoing the damage.
This probably won't work in all situations, but it's still better than nothing.
GRUB has no functions to extract framebuffer data into a bitmap for the higer
levels to use later.
So far I have a fully working mouse but it leaves "snail trails" on other
bitmaps. :)
Does anyone have any hints?
/Christian
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