Don't dirty the vertex buffer for stride/rate changes on bundles. #2744
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
`wgpu_core::command::bundle::State::set_pipeline` marks a vertex buffer slot dirty if the pipeline's stride or step mode for that vertex buffer slot differs from what had been previously established. The effect of marking the slot dirty is to ensure that a new `SetVertexBuffer` command is inserted before the next draw command that uses that vertex buffer. However, this is unnecessary: `wgpu_hal::CommandEncoder::set_vertex_buffer` does not need to be called simply because the stride or rate has changed.
jimblandy
force-pushed
the
vertex-stride-changes-not-dirty
branch
from
82c8b15 to
824da00
Compare
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Outdated suggestions cannot be applied.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.
wgpu_core::command::bundle::State::set_pipelinemarks a vertex buffer slot dirty if the pipeline's stride or step mode for that vertex buffer slot differs from what had been previously established. The effect of marking the slot dirty is to ensure that a newSetVertexBuffercommand is inserted before the next draw command that uses that vertex buffer. However, this is unnecessary:wgpu_hal::CommandEncoder::set_vertex_bufferdoes not need to be called simply because the stride or rate has changed.