tree 00918f7b8e7c2dbb97be60e82b8a7ab6171efe27
parent 2ba90d6654861d7b11e64f50b4e0d4e5d232c291
author Bryan Bernhart <bryan.bernhart@intel.com> 1588288756 +0000
committer Commit Bot service account <commit-bot@chromium.org> 1588288756 +0000

D3D12: Decouple descriptor heap allocations.

Allows bindgroups to be populated by heap type. Previously, failing to
populate one type of GPU descriptor heap required both GPU heaps
to be switched out. This resulted in extra copies and heap allocations
should only one heap type overflow.

This change also simplifies GPU descriptor heap management:
- Allocator no longer needs to operate on both heaps.
- Sub-allocation tracking can be moved into handles.

A follow-up change will remove duplicated sampler heap allocations.

BUG=dawn:155

Change-Id: I1960cf3a8bc3d86d3e8b2775da3d0c92125bcf82
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/19887
Commit-Queue: Bryan Bernhart <bryan.bernhart@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>