[Openmsx-bugs] [ openmsx-Bugs-603673 ] Terrible slowdowns in SDLGL pixelprecision

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Bugs item #603673, was opened at 2002-09-02 22:05
Message generated for change (Comment added) made by manuelbi
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Category: General/misc
Group: None
>Status: Closed
>Resolution: Invalid
Priority: 5
Submitted By: Manuel Bilderbeek (manuelbi)
Assigned to: Maarten ter Huurne (mthuurne)
Summary: Terrible slowdowns in SDLGL pixelprecision

Initial Comment:
When compiled with pixel precision, sometimes the
emulator runs very very very slowly (10% or so) in the
GL renderer. Examples are Space Manbow, the
NOTONLYSNESCANDOTHIS part of Unknown Reality.

I know Maarten and/or Wouter need to optimze the code.
This is just a reminder. :-)

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>Comment By: Manuel Bilderbeek (manuelbi)
Date: 2005-09-09 22:06

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I don't find this reminder very useful anymore. I'm closing
the bug.

There are several ways to improve SDLGL by using different
kinds of textures, for example. The slowdowns are not very
big anymore though, and they depend heavily on the hardware
anyway.

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Comment By: Manuel Bilderbeek (manuelbi)
Date: 2003-11-13 11:23

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Another example:the title screen of the MSX1 game "Rise Out
(from dungeons)". My system goes to 100% CPU usage, until
the game itself starts. The title letters have some kind of
color scrolling which seems to be the thing that slows it
down. However, when switching to screen accuracy, the CPU
usage drops incredibly to normal values.

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