Update lv-tool and examples to use SDL 2 #193

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1. kaixiong

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   enhancement

   on Jan 20, 2023
2. hartwork commented on Jan 20, 2023

   

   hartwork

   on Jan 20, 2023

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   • I hope the key constansts have not changed from SDL 1 to SDL 2 because we have a copy of SDL 1 values in here
   • My mini demo at https://github.com/hartwork/sdl_video_demo was done with this upgrade in mind and could be of interest. It allows seeing SDL 1 and 2 code side by side for the same thing. Rather close to libvisual examples.

   👍React with 👍1Reacted by Chong Kai Xiong
3. kaixiong commented on Jan 21, 2025

   

   kaixiong

   on Jan 21, 2025

   Last edited by kaixiong

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   Quick update: I tried porting lv-tool to SDL 2.0 about a year or so ago but ran into an annoying impedance mismatch between Bin's handling of rendering targets (Video objects) and SDL2's software rasterisation API.

   Basically, SDL2 requires the caller to map and unmap the pixel buffer for each draw call and there is no nice way to make it work with the existing Bin implementation without involving an unnecessary full screen/window copy for each frame. I also didn't understand Bin enough to adapt it.

   Fast forward to now, I've just managed to almost completely re-implement Bin (some minor work still needed to preserve the existing semantics and to handle GL actors). Endless actor cycling and morphs now work flawlessly without crashing now. So I expect to be able to get to this port as the next step.

   👍React with 👍2Reacted by Sebastian Pipping and Stuart Axon
4. kaixiong commented on Jan 24, 2025

   

   kaixiong

   on Jan 24, 2025

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   SDL 3 has been released.

   👍React with 👍1Reacted by Sebastian Pipping
5. kblaschke commented on Nov 3, 2025

   

   kblaschke

   on Nov 3, 2025

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   In addition to the above, SDL 1 also creates GL contexts in some way that they aren't compatible with anything using Core profile 3.0 or higher. That's easy to test: if RenderDoc can't capture it, it's too old.