voodoo buggy demoscene demos (minor value, because games are ok)

[WhiteMagicRaven]

artifacts on demo (while on voodoo=opengl) Glide emulation trough opengl

Expected behavior
https://www.youtube.com/watch?v=8UZh_s84uRs&ab_channel=MichaelHuth

Windows 7 64 bit
DOSBox-X latest
voodoo_card = opengl
voodoo_maxmem = true
glide = true
lfb = full
splash = false

(statically linked)
Dimen https://www.pouet.net/prod.php?which=2182 -> minor (3dfx logo upside down, 3dfx logo sometimes wrong texture, wrong surface sorting, completely missed polygons, 2d pictures serious slowdowns)

Other tests (statically linked)
https://www.pouet.net/prod.php?which=16129 (everything ok)

Test of games (statically linked) (all ok, minor slowdowns but nothing affect gameplay, all slowdowns miracle not in 3d scenes)
Battle Arena Toshinden
Descent II
EF 2000
EF 2000: Tactcom
Screamer 2
Starfighter 3000
Tomb Raider
UEFA Champions League
Whiplash
XCar: Experimental Racing
VR Soccer '96: Semifinals
Actua Soccer: Semifinals 3d
Fatal Racing 3d

[Wengier]

I think it is important for the purpose of DOSBox-X, as demos are useful to verify the accurateness of the emulation. @joncampbell123 probably wants to take a look at this.

[grapeli]

The problem is the second part of this demo (after intro), from the moment of changing the brightness of the graphic background. With core=dynamic_x86 set, it seems to die completely. However, with core=normal, it is very sloooow (about 8-10 minutes for me). After the end of this sequence, the demo continues to play correctly.

Edit:
The biggest problem is with the sequence with the brightness variation (Gods - Dimension). It runs very slowly. While running dosbox-x with core=normal voodoo_card=opengl glide=false practically does not load cpu during this time (max 3-4%).
Perf shows.

0.78%  dosbox-x                    [.] register_w
0.61%  dosbox-x                    [.] triangle_create_work_item
0.53%  dosbox-x                    [.] EATREE
0.46%  dosbox-x                    [.] ogl_get_vertex_data
0.37%  dosbox-x                    [.] EA_32_44_n
0.31%  dosbox-x                    [.] EA_32_04_n
0.30%  dosbox-x                    [.] fastfill
0.30%  dosbox-x                    [.] FPU_FLD_F32_EA
0.28%  dosbox-x                    [.] FPU_ESC6_Normal
0.26%  dosbox-x                    [.] mem_writed
0.25%  dosbox-x                    [.] mem_readd
0.24%  dosbox-x                    [.] EA_32_05_n
0.23%  dosbox-x                    [.] FPU_FST_F32
0.22%  dosbox-x                    [.] Voodoo_PageHandler::writed
0.20%  dosbox-x                    [.] FPU_ESC1_EA

dimen.mp4

[WhiteMagicRaven]

https://www.pouet.net/prod.php?which=2844

Trip a dos version makes dosbox x crash when trying to run it

[grapeli]

Seems to be working properly from start to finish (voodoo_card=opengl glide=false)
I include part, the whole thing will not fit.

trip.mp4

[WhiteMagicRaven]

hmm for me it crashes 👍
Problem signature:
Problem Event Name: APPCRASH
Application Name: dosbox-x.exe
Application Version: 0.0.0.0
Application Timestamp: 60b5f959
Fault Module Name: glide2x.dll
Fault Module Version: 2.60.0.658
Fault Module Timestamp: 5d7d6fb9
Exception Code: c0000005
Exception Offset: 0000c81f
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

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[grapeli]

@Wengier
This demo dimen behaves weird.
When a scene occurs with lightning dosbox-x as if going into idle mode, the cpu load drops. The window seemed to be losing activity (1:09). If we start to manually change its activity quickly, the demo action runs more smoothly, and after its completion it is completely correct (2:18). Core settings have no effect on this. You can use dynamic_x86.

dimen.mp4

[Wengier]

@grapeli Yes, I can reproduce the said problem, in both low-level and high-level 3dfx emulation. Not sure if there is some setting (other than core) which can solve this. There is no entry for this particular demo (Dimension by Gods) in the Wiki I think.