Messages in this thread | | | Date | Thu, 9 Jan 2003 19:54:22 +0000 (GMT) | From | James Simmons <> | Subject | Re: [Linux-fbdev-devel] rotation. |
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> However, as Geert mentioned, if you want to support rotation > generically, then you have to do it in the fbcon level. The driver need > not know if the display is rotated or not. All it needs to do is fill a > region with color, color expand a bitmap and move blocks of data, and > optionally 'pan' the window. Fbcon will pass the correct (ie, oriented) > information for the driver.
Yes. Hardware rotation shouldn't also not effect the way accel operatations are done.
> This will not be too processor intensive as long as some data is > prepared beforehand, like a rotated fontdata.
Yeap!! The only thing is we could end up with 4 times the amount of data.
> The main difficulty with this approach is how do you tell the console to > rotate the display? We cannot use fbset because the changes will not be > visible to fbcon.
I think it should video fbcon=rotate:90 command line for example.
> I submitted a patch before (see fbdev archives for "Console Rotation" > thread) that rotates the console this way. I had vga16fb, vesafb, and
I seen it and even have it still.
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