Don't track variations at default location #38
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
For variable fonts, when all normalized coordinates are equal to 0, that is equivalent to the default location in variation space and all variation processing can be disabled. Detect this when pushing a new shaped run and don't store the unnecessary coordinates.
xStrom
approved these changes
Apr 20, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
For variable fonts, when all normalized coordinates are equal to 0, that is equivalent to the default location in variation space and all variation processing can be disabled.
Detect this when pushing a new shaped run and don't store the unnecessary coordinates.
This "fixes" a current performance problem in vello where glyphs from variable fonts are not cached. This effectively forces variable glyphs at the default location to be treated as non-variable allowing them to be cached.