Capcom Classics Collection Reloaded graphical glitches in menu

[Panderner]

There's a graphical glitches as seen in menu screen in Capcom Classics Collection Reloaded:

[nassau-tk]

Will this issue happen what kind of backend?
May be, OpenGL is happen and Vulkan is not happen.

[ghost]

There's a graphical glitches as seen in menu screen in Capcom Classics Collection Reloaded:

ge dump?

[Panderner]

There's a graphical glitches as seen in menu screen in Capcom Classics Collection Reloaded:

ge dump?

recording.ppdmp.zip
yes sir @Gamemulatorer

[ghost]

ge dump?

recording.ppdmp.zip
yes sir @Gamemulatorer

Can't load your ge dump

[nassau-tk]

@Gamemulatorer

How about by this data?
ULJM05104.zip

[Panderner]

@Gamemulatorer

How about by this data?
ULJM05104.zip

I'm using USA version of this game @nassau-tk.

[ghost]

@Gamemulatorer

How about by this data?
ULJM05104.zip

It's load 🙂

[hrydgard]

What hardware are you seeing this glitch on? GE dump looks good on nvidia.

EDIT: Actually looks a bit different:

[Panderner]

I'm using Realme C2 in OpenGL.

[hrydgard]

OK so a PowerVR GE8320. I'll try on a Huawei phone with PowerVR I have later.

[nassau-tk]

@hrydgard

I'm using SONY Xperia SO-02K & RADEON RX5700XT PC.
The issue happen both device.
When it's helpful, I'm happy.

[Panderner]

@hrydgard

I'm using SONY Xperia SO-02K & RADEON RX5700XT PC.
The issue happen both device.
When it's helpful, I'm happy.

@nassau-tk have you tried in all backends?

[ghost]

Also happen on Mali GPU's

[nassau-tk]

@Panderner
@Gamemulatorer
@hrydgard

Yes, I tried OpneGL & Vulkan both backends on Xperia.
OpenGl happen the issue.
Vulkan don't happen the issue.
And,I tested Capcom Classic Collection (ULJM05104).
May be it's a Japanese model.
But, May be same system I think.
Because, It happen same issue.

I tested Windows10(64-bit) D3D9 & D3D11 too.
D3D9 is not drawing corectly.
D3D11 is drawing corectly.
Dump files here.

ULJM05104_Windows10_64bit_D3D11_OK.zip
ULJM05104_Windows10_64bit_D3D9_NG.zip

[nassau-tk]

@hrydgard

Oh...Yes.

OS: Windows10(64-bit)
CPU: Intel i7-4770K
GPU: NVIDIA GeForce GTX750Ti

OS: Windows10(32-bit)
CPU: Intel Celeron G1610
GPU: Intel HD Graphic(On board Chip)

These spec PC are not happen glitched on the menu screen.

Android 9.0 / SD835 / Adreno540 is still happening!!

[nassau-tk]

I'm come back home and retested on my PC.
PPSSPP v1.10.3-709
OS: Windows10(64-bit)
CPU: Ryzen7 3800X
GPU: RADEON RX5700XT

In game like this.

But, Dump file is not appear glitched.
ULJM05104_0001.zip

[Panderner]

@nassau-tk have you tried all other backends on windows?

[nassau-tk]

@Panderner

Yes,I tested on My PC.
"Windows10(64-bit) / Ryzen7 3800X / RADEON RX5700XT"

I wrote above.

I tested Windows10(64-bit) D3D9 & D3D11 too.
D3D9 is not drawing corectly.
D3D11 is drawing corectly.
Dump files here.

[nassau-tk]

This glitch is not reproduce on GE debbuging from dump file.
(I tested on RADEON/GeForce both.)
It can be show only on the playing screen.

[unknownbrackets]

For me, there's no flicker in the latest git build. It looks fine on all backends except Direct3D 9. It also looks fine on mobile (Adreno.)

Direct3D 9 seems to be having trouble due possibly to the default depth value of buffers. It draws the missing rings using a >= depth test, but the depth is flat at -1 (translated from 0 and expressed 16-bit space.) This should clamp, though, since the clamp flag is on.

The depth buffer should have zero at this point (it's not getting cleared each frame, though.) But D3D9 has the zero that isn't really zero - the bottom of the 1/4 slice. This makes the "clamp simulation" fail since it's a >= test. If the clamp simulation wasn't there, it'd still fail, because -1 isn't within 0 - 65535 anyway.

Since these draws are flat, in theory we could detect they have equal Z and clamp them in the vertices.

-[Unknown]

[nassau-tk]

My Galaxy S20 is still happen the blinking glitch on OpenGL.

v1.11.2-75

[unknownbrackets]

Maybe it's a driver thing and we'll have to round depth values? It is using >= and this requires essentially an == 0, maybe it's just z fighting.

-[Unknown]

[Panderner]

Here's a working GE dump for USA version
ULUS10134_0001.ppdmp.zip

[unknownbrackets]

Does working mean that you see the glitches in when viewing that GE frame dump?

-[Unknown]

[nassau-tk]

@unknownbrackets

Oops, my report is meaning japan ver.

20210216_120245.mp4

[Panderner]

My POCO M3 had less flickers in OpenGL but my Realme C2 had lots of flickers.

[nassau-tk]

I tested on my Windows PC again. (Ryzen + RADEON)

It still happen the issue on OpenGL.

[samosaphile]

This issue is still happening to me on my 730g snapdragon adreno 618 device. Pixel 4a using vulkan backend. I tried using opengl it seems to draw / render mostly accurately but there's still flickering going on.

[ghost]

This is also broken/missing on background in mali gpu vulkan but can workaround by DisableAccurateDepth

Vulkan

Vulkan DisableAccurateDepth enable but flickering a lot!

OpenGL slightly flickering

Software the most stable

[unknownbrackets]

If this sorta works with skewed depth (i.e. disabled accurate depth), I assume it's probably that the depth range for both cases gets clamped to 0, so depth is "kinda" clamped. Flicker is probably due to when that range clamping doesn't cause the values to match.

Presumably this only works properly where depth clamp is supported. We might be able to rewrite a flat Z, though - there'd be no risk of deforming if it was flat. Anyway, there are more ideas in #11399, iirc.

-[Unknown]

[nassau-tk]

Yes, My Galaxy S20 has a flickering on OpenGL.