tree 85cede2150b95977ceefea88e2bad28ec2ff4656
parent 95b76912465670b8c723f29a5a6f047933f4fa8a
author Alexis Hetu <sugoi@google.com> 1634183353 -0400
committer swiftshader-scoped@luci-project-accounts.iam.gserviceaccount.com <swiftshader-scoped@luci-project-accounts.iam.gserviceaccount.com> 1634586868 +0000

Fix blitting of various packed formats

Added clamping to zero when going from a signed to an unsigned format
to fix the output when the input contained negative numbers.

Refactored 4444 formats so that they have the same code structure as
other packed formats (like 5551 or 1010102, for example) and fixed an
error for VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT, when writeRGBA was
false, the channels were in the wrong order.

Bug: b/202978657
Change-Id: I4216e6f989866cc9b0c1ccbf24d7223ca38a6529
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/58170
Tested-by: Alexis Hétu <sugoi@google.com>
Commit-Queue: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>