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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
07586 Graphics Minor Always Mar 7, 2020, 17:56 Mar 8, 2020, 16:24
Tester hap View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows 10 (64-bit)
Status [?] Confirmed Driver
Version 0.219 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 07586: Artwork: screen combined with multiply-blend does not work on BGFX D3D9
Description Artwork: screen combined with multiply-blend does not work on BGFX D3D9.
With MAME's layout artwork system, when blending the screen by multiplying with another element, in some cases(which exactly?), it does not work properly with BGFX D3D9.

Exact cause is unsure, symptom is severe: a blank screen element.
But it only happens with this backend, so I'll leave bug severity on Minor.
Steps To Reproduce mame64.exe ccmk5 -video bgfx -bgfx_backend d3d9

Also, see attachment for a simplified layout test that will result in a black screen.
mame64.exe pacman -video bgfx -bgfx_backend d3d9

It also happens with neogeo cropped/stretched view.
I hoped to be able to fix it by removing the multiply blending, but it still did not work. See attachment for my try, where cropped screen does work, but stretched screen still gives a black screen.
In other words, it is not caused only by multiply-blend.
Additional Information
Github Commit
Regression Version
Affected Sets / Systems
Attached Files
zip file icon (390 bytes) Mar 7, 2020, 18:18 Uploaded by hap
zip file icon (458 bytes) Mar 7, 2020, 18:39 Uploaded by hap
related to 07587Confirmed Artwork: multi-screen layer blending problem with BGFX 
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