https://github.com/pojavlauncherteam/vgpu

https://github.com/pojavlauncherteam/vgpu

Last synced: 2 days ago
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• Host: GitHub
• URL: https://github.com/pojavlauncherteam/vgpu
• Owner: PojavLauncherTeam
• Created: 2021-08-21T17:03:45.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2023-09-24T07:00:33.000Z (about 1 year ago)
• Last Synced: 2024-02-25T18:42:50.240Z (9 months ago)
• Language: C
• Size: 6.92 MB
• Stars: 1
• Watchers: 1
• Forks: 7
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# VGPU

The project is a bit like GL4ES, where I want to implement a hardware-accelerated GL converter: when an application calls the GL library, it will be mapped to GLES. In other words, VGPU packages the GLES library as a GL library.

# Current Status

GLAPI wrap:

Most of the GL2.x API and a small amount of GL3.x API(mainly texture and Uniform, because some of the special built-in variables of GLSL120 are now provided by GL4ES by combining API(glUniform) with shader string converters, such as gl_Vertex) now call gl4es.

Global Implicit Type Conversion:

Supported:

int/ivecn <-> float/vecn

uint/uvecn <-> float/vecn

Converters:

Convert most variables in the Shader to the same intermediate type (such as float), and use a type constructor for uniform variables. The converter contains some simple context judgments.

Some problems brought about by this:

The arguments and return values of some built-in functions that use type int are constructed as intermediate types, which causes them to fail. But most of these functions have now been fixed.

Universal Syntax Converter:

Shader conversion is based on ESSL3.x.

For GLSL120+(compatibility), all GLSL120 built-in variables and keywords will be converted to ESSL3.x, such as gl_FragData[n].

For GLSL150+(core), the converter now only has some simple conversions (it is not yet separated from the former).

Other converters:

(Based on simple contextual judgments)

Supports assigning nonconst variables to const variables within a block.

not supported declaring array sizes with simple variables initialized to constants yet.

The % mod operator is not yet supported (this causes MC1.17 to fail because shader uses %)

# About vk

Now and in the future I will work mainly on the vgpu_vk branch.