Gl_FragColor = texture2D(u_texColor, v_texcoord0) $input v_color0, v_texcoord0 SAMPLER2D(u_texColor, 0) sc, similar to glsl, but is preprocessed, so it is compiled to other rendering backend languages, examples: BGFX has its own shader compiler, shaderc, which accepts its own shading language language. An informative presentation: From the Dark Side of the Moon: GPU Programming with BGFX and Eclipse, a good introduction to bgfx (although for a different platform, general concepts apply). The other options are to implement our own rendering backends separately, or, stay on OpenGL (do nothing). ', supports D3D, Vulkan, Metal, OG元, and OGL ES 3, but its for dotnet. Veldrid: 'A low-level, portable graphics and compute library for.The Forge 'The Forge Cross-Platform Rendering Framework PC, Linux, Ray Tracing, macOS / iOS, Android, XBOX, PS4', started last year, looks good.ogre 'straddles the line between game engine and framework', seems more like a game engine?.You can use the C++ library, Kore, without Kha.

A blank project targeting JavaScript runs on Electron and builds in a few seconds, but for Visual Studio it took nearly two minutes. Has its own IDE, Kode Studio, based on Visual Studio Code. Compiles GLSL shaders down to HLSL or Unity. Very ambitious, but how mature is it? Gamesfromscratch made a video on it: What is Kha? Cross Platform Game Magic Sauce!. Kha/ Kore: 'Modern low level game library and hardware abstraction.', supports a ridiculous number of platforms including PlayStation 4, Xbox One, Nintendo Switch.Or what I'm interested in: use an abstraction layer. Use Vulkan + MoltenVK (but then, another layer of abstraction, and does everything have Vulkan yet? Not quite ready to let go of OpenGL yet). Use an existing rendering engine (no go, would like to stay lower level as Steven already is, but could be viable in some situations). Games From Scratch: Cross Platform OpenGL Alternatives has a good list, several options.

Moltengl opengl 4.3 core