Internal Color Depth option missing when using Vulkan Renderer

[jibarofoss]

Description

Internal Color Depth option is missing when using the Vulkan renderer.

Expected behavior

Internal Color Depth option would be available when using the Vulkan renderer (like when using the opengl renderer)

Actual behavior

Internal Color Depth option is missing when using the Vulkan renderer.

Steps to reproduce the bug

Prerequisite: Set core to vulkan renderer

1. Load Beetle PSX HW Core
2. Boot game
3. Go to quick menu and go into options

Bisect results

Noticed it happening about a week ago

Version/Commit

Beetle PSX HW (0.9.44.1 3ad4902) (Started to notice here) Beetle PSX HW (0.9.44.1 b432b689) (Moved to git version to see if the issue was resolved, it wasn't)

Core options

• Renderer: Hardware (Vulkan)
• Internal GPU Resolution: 16x
• Dithering Pattern: OFF
• Adaptive Smoothing: ON
• MDEC YUV Chroma Filter: ON
• PGXP Operation Mode: Memory Only
• PGXP Primitive Culling: ON
• PGXP Perspective Correct Texturing: ON
• CPU Dynarec: Max Performance
• Dynarec Code Invalidation: Full
• Dynarec DMA/GPU Event Cycles: 256
• Skip BIOS: ON
• PAL (European) Video Timing Override: ON
• CD Access Method: Pre-Cache

Environment information

• Frontend: RetroArch 1.9.0
• OS: Arch Linux x86_64
• Compiler: GCC 10.1.0 64-bit
• GPU: Radeon RX 580, mesa 20.2.1-1 & vulkan-radeon 20.2.1-1

[Sanaki]

Read the description of "Dithering Pattern". On vulkan, the color depth is directly tied to that setting. With it off, it's 32bpp. With it on, it's 16bpp.

[keylimesoda]

I'm not sure this is behaving correctly. With dithering disabled, I'm still seeing significant color banding in SH1.

[keylimesoda]

Here's another screenshot in vulkan without the CRT filter. Still some rainbow banding, but not as noticeable.

And here's a ss in software renderer