[Issue] [GBA.emu]: Sprite becomes invisible instead of blinking

Rakashazi / emu-ex-plus-alpha

Multi-platform computer & game console emulation system including supporting code (EmuFramework) and core engine (Imagine)

GNU General Public License v3.0

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[Issue] [GBA.emu]: Sprite becomes invisible instead of blinking #1636

Open 382kB opened 2 weeks ago

382kB commented 2 weeks ago

Describe the bug

I'm playing "Shin-chan: Aventuras en Cineland" and when my character deals damage to an enemy it becomes invisible instead of blinking.

I use BIOS

Shin chan - Aventuras en Cineland (Spain).gba

CRC  769a7666
MD5  0dbc85a954aba764a3bbae2e078d26f0
SHA1 069b7e991a35a78b321959f2f194

Steps to reproduce

Start the game
Enter the first phase
Face the mini boss and boss

Expected behavior

11:40 and 13:03

Relevant log output

No response

Add screenshots

No response

IdiotBlueMage commented 2 weeks ago

This may be the fault of VBA-M's auto-blend. Instead of replicating flickering sprites on purpose for transparencies on the GBA screen, this emu will blend them together by default. Nice on F-Zero because GBA.Emu has no frame blend modes, but bad on edge cases.

Rakashazi commented 16 hours ago

I tested this and the sprite is blinking fine for me. Check to make sure you aren't running at 1/2 the target frame rate as that will break flicking effects. Also I haven't forgotten about implementing an inter-frame blending mode but my plan it to make it a pre-processing shader so there's no CPU overhead and allow it to work on every emulated system in a generic way.