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Fixes: #9060
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Based on / supersedes PR #6912, implements discussion #6901
Co-authored-by: Krone Corylus <ahustinkrone@gmail.com>
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These should not be independent per-frame, that makes the time
calculations all sorts of jank.
Also moves the uniforms struct layout in to `shadertoy.zig` and cleans
up the handling in general somewhat.
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This commit is very large, representing about a month of work with many
interdependent changes that don't separate cleanly in to atomic commits.
The main change here is unifying the renderer logic to a single generic
renderer, implemented on top of an abstraction layer over OpenGL/Metal.
I'll write a more complete summary of the changes in the description of
the PR.
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https://ziglang.org/download/0.14.0/release-notes.html#Calling-Convention-Enhancements-and-setAlignStack-Replaced
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This commit refactors RepeatablePath to contain a list of tagged unions
containing "optional" and "required" variants. Both variants have a null
terminated file path as their payload, but the tag dictates whether the
path must exist or not. This implemenation is used to force consumers to
handle the optional vs. required distinction.
This also moves the parsing of optional file paths into RepeatablePath's
parseCLI function. This allows the code to be better unit tested. Since
RepeatablePath no longer contains a simple list of RepeatableStrings,
many other of its methods needed to be reimplemented as well.
Because all of this functionality is built into the RepeatablePath type,
other config options which also use RepeatablePath gain the ability to
specify optional paths as well. Right now this is only the
"custom-shaders" option. The code paths in the renderer to load shader
files has been updated accordingly.
In the original optional config file parsing, the leading ? character
was removed when paths were expanded. Thus, when config files were
actually loaded recursively, they appeared to be regular (required)
config files and an error occurred if the file did not exist. **This
issue was not found during testing because the presence of the
"theme" option masks the error**. I am not sure why the presence of
"theme" does this, I did not dig into that.
Now because the "optional" or "required" state of each path is tracked
in the enum tag the "optional" status of the path is preserved after
being expanded to an absolute path.
Finally, this commit fixes a bug where missing "config-file" files were
not included in the +show-config command (i.e. if a user had
`config-file = foo.conf` and `foo.conf` did not exist, then `ghostty
+show-config` would only display `config-file =`). This bug applied to
`custom-shaders` too, where it has also been fixed.
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