Post by Jacoder23 in OPTIMIZED OUTLINE Shader for Ren'Py comments

OPTIMIZED OUTLINE Shader for Ren'Py » Comments

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Hello, just to start, this shader is great! The smart padding is especially nice to have.

However, I’m having an odd issue. I tried building my game for web and got the following exception when booting the game:

...
File "renpy/gl2/gl2shader.pyx", line 267, in renpy.gl2.gl2shader.Program.load_shader
renpy.gl2.gl2shader.ShaderError: ERROR: 0:31: '[]' : Index expression must be constant
...
Emscripten-3.1.67-wasm32-32bit wasm32
Ren'Py 8.5.2.26010301

The rest of the error is too long to include here though I could DM it if needed but after the first Index expression must be constant, the same error repeats several more times with the 0:31 number changing.

The game worked fine when running on my computer so I removed any files related to shaders one at a time and it seems to build for web just fine IF I remove this shader. If you have any idea of how to fix this without me having to change outline shaders, I’d be very grateful.

GRIMUMU7 days ago(+1)

Hello! Thank you so much for your feedback and I am really sorry for the trouble this error caused you. The issue happens because web browsers are much stricter with shader code than computers, which caused a conflict with Ren'Py textures. To fix this, I just uploaded a Version 2 along with the original download here on Itch.io, you can download it and test it with total confidence since I only removed the redundant lines that caused the problem and it shouldn't break anything in your game. It should work perfectly now, but if anything else comes up, please let me know so I can see if it can be fixed, sorry again for the inconvenience!

Jacoder237 days ago (2 edits)

Thanks for the response and help, it looks like I’m still having trouble however. Now the game won’t build/run at all:

While running game code:
  File "game/11_shader_outline_v2.rpy", line 40, in script
    init python:
  File "game/11_shader_outline_v2.rpy", line 41, in <module>
    renpy.register_shader("remix.optimized_outline",
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
        variables="""
        ^^^^^^^^^^^^^
    ...<60 lines>...
        }
        ^
        """)
        ^^^^
Exception: In shader remix.optimized_outline: Unknown shader variable line 'vec2 u_offset;'. Only the form '{uniform,attribute,vertex} {type} {name} is allowed.

I removed the old outline shader script and dropped in the new one without changing anything else.

Just as a sanity check I made a new Ren’Py project and dropped the new shader script in and got the same error. Then I replaced it with the old script and it works when running on my PC and… on web, huh. I went back to my main project and tried building for web again with the old script and the same error I first reported still appeared.

I’m now very confused, ahaha. It might be an issue with my project somehow? I’m really unsure how it’s possible but it seems to work otherwise.

EDIT: I think you can safely ignore my bug report. The same issue from before is now occuring even if I remove this shader from my game. At the very least, this shader isn’t at fault but safe to say I’ve quite the headache ahead.

EDIT 2: It appears to be an issue with a gradient shader from a different developer. I have no idea why the issue disappeared when I removed this shader from my game but mystery solved.

itch.io

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