alex/librashader
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

doc(readme): document shader pre-linkage

Browse source
This commit is contained in:
chyyran 2024-08-20 00:10:23 -04:00 committed by Ronny Chan
parent fee92113f1
commit f8c055524b
1 changed files with 3 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
README.md
View file

@ -151,6 +151,9 @@ Please report an issue if you run into a shader that works in RetroArch, but not
`mipmap_input0 = "true"`. `mipmap_input0 = "true"`.
* The preset parser is a substantially stricter implementation that the one in RetroArch. Not all shader presets may be * The preset parser is a substantially stricter implementation that the one in RetroArch. Not all shader presets may be
compatible. If you find this is the case, please file an issue so a workaround can be added. compatible. If you find this is the case, please file an issue so a workaround can be added.
* Shaders are [pre-linked at the SPIR-V level](https://github.com/SnowflakePowered/librashader/blob/master/librashader-reflect/src/front/spirv_passes/link_input_outputs.rs) before being
passed to the driver. Unused inputs in the fragment shader are removed, and the corresponding input in the vertex shader
is downgraded to a global variable.
### Runtime specific differences ### Runtime specific differences
* OpenGL * OpenGL
* Copying of in-flight framebuffer contents to history is done via `glBlitFramebuffer` rather than drawing a quad into an intermediate FBO. * Copying of in-flight framebuffer contents to history is done via `glBlitFramebuffer` rather than drawing a quad into an intermediate FBO.