tree c3e6ab4d9ca84aaa2bfca5cf980e723ac8cbc6ab
parent 3655209d86f4aaa7033cb5bd8d67098483670025
author Alexis Hetu <sugoi@google.com> 1536075022 -0400
committer Nicolas Capens <nicolascapens@google.com> 1536356673 +0000

Guard against out of bounds accesses caused by a large base level

A texture's base level can be any positive integer, but SwiftShader
stores texture levels in a array that has an implementation
dependent size (IMPLEMENTATION_MAX_TEXTURE_LEVELS). To avoid
accessing this array out of bounds, a class was added to make sure
all accesses to the array are done within its bounds.

Change-Id: I9b439018f209a47371bd2959ba847345326964dd
Reviewed-on: https://swiftshader-review.googlesource.com/20488
Tested-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>