WEBGL_render_shared_exponent: Update color writemask validation#3780
Merged
Conversation
Original language was based on the Vulkan spec that required only red, green, and blue color writemask values to be the same. It turned out that some GPUs apply the alpha writemask to the shared exponent component. As a result of that discovery, the Vulkan spec has been updated (1.4.355, dd June 26, 2026) to require all color writemask values to be the same for color attachments with the shared exponent pixel format. Since the same requirement exists in Metal and Direct3D, the WebGL extension is updated to match native APIs. New validation is implemented in Chromium since 152.0.7926.0.
Member
|
Note: this was associated with Chromium issue 529454067. |
This file contains hidden or 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
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
Original language was based on the Vulkan spec that required only red, green, and blue color writemask values to be the same.
It turned out that some GPUs apply the alpha writemask to the shared exponent component. As a result of that discovery, the Vulkan spec has been updated (1.4.355, dd June 26, 2026) to require all color writemask values to be the same for color attachments with the shared exponent pixel format.
Since the same requirement exists in Metal and Direct3D, the WebGL extension is updated to match native APIs.
New validation is implemented in Chromium since 152.0.7926.0.