RadV doesn't work

[Quackdoc]

Running an rx580

set VK_ICD_FILENAMES=...\radeon_icd.x86_64.json

..\vkconfig.exe

Vulkan Development Status:

• Layers override: "Validation" configuration
• VULKAN_SDK environment variable: C:\VulkanSDK\1.2.189.2
• Vulkan Loader version: 1.2.170
• User-Defined Layers Paths from VK_LAYER_PATH environment variable: None
• User-Defined Layers Paths from Vulkan Configurator: None
• vk_layer_settings.txt uses the default platform path: C:\Users\Quack\AppData\Local\LunarG\vkconfig\override
• Available Layers:
  • VK_LAYER_AMD_switchable_graphics (1.2.174)
  • VK_LAYER_OBS_HOOK (1.2.131)
  • VK_LAYER_VALVE_steam_overlay (1.2.136)
  • VK_LAYER_VALVE_steam_fossilize (1.2.136)
  • VK_LAYER_EOS_Overlay (1.2.136)
  • VK_LAYER_EOS_Overlay (1.2.136)
  • VK_LAYER_ROCKSTAR_GAMES_social_club (1.0.70)
  • VK_LAYER_LUNARG_api_dump (1.2.189)
  • VK_LAYER_LUNARG_device_simulation (1.2.189)
  • VK_LAYER_LUNARG_gfxreconstruct (1.2.189)
  • VK_LAYER_KHRONOS_synchronization2 (1.2.189)
  • VK_LAYER_KHRONOS_validation (1.2.189)
  • VK_LAYER_LUNARG_monitor (1.2.189)
  • VK_LAYER_LUNARG_screenshot (1.2.189)
• Cannot find a compatible Vulkan installable client driver (ICD).

[pal1000]

Note that VK_ICD_FILENAMES only accepts absolute paths. Also @jpark37 may be able to answer to this as he's the one making the port to Windows.

[Quackdoc]

Giving it an absolute path did not help

[jpark37]

Open the JSON file itself, and replace "./vulkan_radeon.dll" with ".\\vulkan_radeon.dll" to make the loader happy.

EDIT: I can update Mesa at some point to modify the JSON generation, but it's surprisingly difficult because the Python JSON lib automatically converts backslash to slash for some reason.

EDIT 2: Actually Meson's fault, not Python.

Be aware that RADV on Windows is more or less a null driver. You can't play games with it.

[pal1000]

I actually have logic fixing the JSON for both RADV and lavapipe post build as I know they were both kinda broken from day 1.

Lavapipe has absolute path in JSON for library_path which is also bad as it's not portable and also has / as separator as well.

[jpark37]

I have an MR here to try to fix the issue in Mesa itself for RADV: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13461

I hadn't noticed because I was copying files around in a way that made the forward slash work somehow, but I can stop doing that with the backslash, which I noticed the regular NVIDIA driver uses.