Vulkan: Hatsune Miku Project Diva F scaling issue (NV specific)

[Nezarn]

Vulkan:

OpenGL:

On DX12 and OGL it works fine. (also the other game i have vulkan works fine so i guess its not a driver\graphics card issue (i have a gtx 970))

Hatsune Miku Project Diva F 2nd demo has the same issue with vulkan.

Shaders and logs (vulkan + opengl) https://gist.github.com/Nezarn/9df63f3ee8c0a5f2ae6c18fa0a4bc15f

[SakataGintokiYT]

[Vulkan] - Try on 1920x1080

[Nezarn]

Its still bad, screen is still cut off

[kd-11]

Might be a viewport or blitting region issue during flip. I'll take a look.

[kd-11]

Seems to be Geforce specific. Plays fine on Radeon with res set to 1280x720. With AMD, the only scaling issue is that the image is not centered after correcting for aspect ratio. This is however not the same as the bug shown here. A developer on NV hardware will have to take a look.

[dbz400]

@kd-11 how about in 720x480 ? basically vulkan has distortion on 720x480 for all my games using nvidia card (however 1280x720 works fine)

[kd-11]

@raven02 720x480 isnt 16:9 hence the distortion. I'll try to set up centered scaling once I finish the fullscreen issue.

[ghost]

I have noticed that using DSR on an Nvidia Graphics card can help, but it's not exactly perfect either. From what I've seen, a higher screen resolution makes it so less of the image is scaled out, but when I use my 1600x900 screen resolution, the image looks almost like Nezarn's.

[dbz400]

@kd-11 , hopefully this scaling issue on Vulkan for NV users can be fixed .

[kd-11]

Unfortunately, I dont have access to NV+vulkan gpu. The driver seems to not like the texture format being scaled here though. The vulkan spec has something about this, but I'll have to check again since its been a while. If I'm right, i'll have to emulate hardware texture scaling for NV.

[dbz400]

Vulkan on NV is trouble . I remember we also have difficulty to get Vulkan work on NV at the very beginning

[kd-11]

@raven02 Can you check if using Nearest filtering fixes this bug? You can find the function copy_scaled_image in VkTexture.cpp and change VK_FILTER_LINEAR to VK_FILTER_NEAREST

[ghost]

Raven02, with the latest build, the scaling is still incorrect even when in fullscreen.

[dbz400]

@kd-11 No luck .Just tested , still scale wrong .

vkCmdBlitImage(cmd, src, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL, dst, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, &rgn, VK_FILTER_NEAREST);

[dbz400]

Yes , full screen scaling is also incorrect as well

[dbz400]

Issue resolved .Closed

[kd-11]

Just to clarify for future reference, the bug was in the renderArea declaration of the render pass.