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pc-tty: add framebuffer-based console #515

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pc-tty: add framebuffer-based console #515

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Commits on Oct 30, 2024

  1. pc-tty: add framebuffer-based console 

    Adds a graphics mode console that prints terminal output in 8x16 font
to a linear framebuffer located under address queried via platformctl/pctl_graphmode
in a 80x25 terminal resolution.

This implementation assumes ARGB ordering of the framebuffer

JIRA: RTOS-925
    @adamgreloch
    adamgreloch committed Oct 30, 2024
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  2. pc-tty: add enabling/disabling fbcon via ioctl 

    Graphical apps can now disable console drawing via ioctl/TTYSETMODE to
ensure uninterrupted drawing (otherwise app and console would draw
to the framebuffer in the same time, causing mess)

JIRA: RTOS-925
    @adamgreloch
    adamgreloch committed Oct 30, 2024
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  3. pc-tty: resize current vt to max fbcon resolution 

    Current vt will now automatically resize from 80x25 to the maximum
resolution supported by current graphic mode if fbcon is enabled
(i.e. for 1280x800 and 8x16 font it will resize to 160x50)

JIRA: RTOS-925
    @adamgreloch
    adamgreloch committed Oct 30, 2024
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  4. pc-tty: pass vram offs to vram accessors instead of ptrs 

    Since the _ttypc_vga_{set,read,write,move} have the ttypc_vt_t already
passed, they can retrieve the vga pointer from that struct. This also
makes the API more secure in case of fbcon, which implicitly assumed
vga == vt->vram when calculating char positions. Now this assumption is
guaranteed

JIRA: RTOS-925
    @adamgreloch
    adamgreloch committed Oct 30, 2024
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