Simutrans 32-bit graphics — work in progress and open for review

[victor_18993]

I have been working on a new 32-bit graphics renderer for Simutrans Standard.

The goal is to modernize the graphics pipeline while keeping compatibility with the existing game and current paksets. Existing 16-bit graphics still work as they do today, but the new renderer can use full 32-bit colour internally, giving us much more room for better shading, transparency, lighting and future higher-quality graphics.

The project is still under development and has NOT been integrated into SVN.

The current version already runs with GDI, SDL2 and SDL3 and has been tested with pak64, pak128 and pak192.comic. The classic 16-bit renderer is still preserved as well.

I have published the current development version here so that anyone interested can review the code, screenshots, documentation and validation results:


https://github.com/Dkijas/simutrans-true32-renderer

The repository also contains the patch against the current development base, build instructions and technical notes.

At this stage I would especially appreciate feedback from maintainers, developers and anyone interested in the graphics side of Simutrans.

There is still work to do before any possible integration into the official trunk, so for now this should be considered a public work-in-progress and review project.

[victor_18993]

I've now been able to reproduce and isolate this properly.
There were actually two separate Windows GDI issues involved: one in resize-event delivery, and another where

Code Select Expand

WindowSize mixed logical and physical pixels when Windows scaling was above 100%.
Both now have tested candidate fixes. I've verified them at 150% scaling with resize, maximize and restore, and the original corruption no longer appears.
I've published the fixes and the test evidence in the public lab repository for review:
https://github.com/Dkijas/simutrans-true32-renderer