Fixes #14171. See that issue for more details.

This is a speculative PR because:

1. I don't know if adding a new bool is actually a wanted approach here, or it should just do this by default.
2. I haven't actually tested this works yet.

Proposed changes

• Adds UseMaskForTransparency to keep existing behavior the default

Customer Impact

• Fixes transparent images having poor aliasing due to mask creation, which shouldn't be required when using 32-bit depth colors.

Regression?

• No

Risk

• None?

Screenshots

Before

After

Test methodology

Accessibility testing

Test environment(s)