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- high-level filters out duplicate render commands from the queue so backends don't have to. - Setting draw color is now a render command, so backends can put color information into the vertex buffer to upload with everything else instead of setting it with slower dynamic data later. - backends can request that they always batch, even for legacy programs, since the lowlevel API can deal with it (Metal, and eventually Vulkan and such...) - high-level makes sure the queue has at least one setdrawcolor and setviewport command before any draw calls, so the backends don't ever have to manage cases where this hasn't been explicitly set yet. - backends allocating vertex buffer space can specify alignment, and the high-level will keep track of gaps in the buffer between the last used positions and the aligned data that can be used for later allocations (Metal and such need to specify some constant data on 256 byte boundaries, but we don't want to waste all that space we had to skip to meet alignment requirements).
Simple DirectMedia Layer
(SDL)
Version 2.0
---
https://www.libsdl.org/
Simple DirectMedia Layer is a cross-platform development library designed
to provide low level access to audio, keyboard, mouse, joystick, and graphics
hardware via OpenGL and Direct3D. It is used by video playback software,
emulators, and popular games including Valve's award winning catalog
and many Humble Bundle games.
More extensive documentation is available in the docs directory, starting
with README.md
Enjoy!
Sam Lantinga (slouken@libsdl.org)