SDL2 port for DOS (DJGPP and VBE 2.0+)#13906

Draft

glebm wants to merge 51 commits intolibsdl-org:SDL2from

diasurgical:dos-vbe-rebase

Commits on Aug 31, 2025

Add DJGPP to configure scripts

jayschwa
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glebm
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Do not use MMX or SSE on x86 hosts by default

jayschwa
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glebm
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djgpp: Get testfile (mostly) passing

jayschwa
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dos: Add support for basic timing functions

jayschwa
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Create SVGA video driver (cloned from dummy driver)

jayschwa
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glebm
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svga: Add VBE types

jayschwa
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svga: Tweak file names

jayschwa
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glebm
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svga: Read VBE info and require VBE 2.0

jayschwa
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svga: Use structs for special VBE fields

jayschwa
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glebm
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svga: Assert VBE struct sizes at compile time

jayschwa
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svga: Implement `GetVBEModeInfo`

jayschwa
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svga: Add `GetCurrentVBEMode`

jayschwa
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svga: Implement `GetDisplayModes`

jayschwa
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svga: Remove `SDL` prefix from VBE functions

jayschwa
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svga: Only use color graphics modes with linear memory

jayschwa
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svga: Convert from VBE to SDL pixel format

jayschwa
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svga: Add SetVBEMode

jayschwa
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glebm
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WIP: svga: Implement framebuffer functions

jayschwa
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glebm
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svga: Use color masks to derive pixel format

jayschwa
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glebm
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svga: Calculate surface size with pitch field

jayschwa
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glebm
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svga: Save framebuffer ptr in device data

jayschwa
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glebm
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svga: Add `VBE_FLAT_PTR` macro function

jayschwa
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svga: Add window functions and data

jayschwa
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svga: Modes must have 4-byte aligned scan lines

jayschwa
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glebm
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svga: Use safer form of memory mapping for framebuffer

jayschwa
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svga: Implement double buffering

jayschwa
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glebm
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WIP: svga: Support indexed color formats

jayschwa
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glebm
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svga: Naively generate key press events

jayschwa
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glebm
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svga: Restore original video state on quit

jayschwa
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dos: Write logs to a file

jayschwa
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svga: Invalidate window surface after freeing it

jayschwa
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dos: Move keyboard handling out of svga

jayschwa
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dos: Use interrupt service routine for keyboard events

jayschwa
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dos: Use PS/2 status register to poll keyboard

jayschwa
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dos: Do not set `pm_selector`

jayschwa
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svga: Add some debug logs

jayschwa
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svga: Remove obsolete SVGA_Available

jayschwa
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WIP: dos: Add mouse support

jayschwa
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glebm
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Add SDL_mouse.h include to SDL_svga_framebuffer.c

AJenbo
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glebm
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dos: fix functions for latest SDL2
glebm
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dos: Do not bother attempting framebuffer texture
glebm
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dos: #if SDL_VIDEO_DRIVER_SVGA -> #ifdef
glebm
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dos: Add CMake configuration
glebm
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dos: implement some extended keys
glebm
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Commits on Sep 2, 2025