VOGONS

Search

Common searches

Pixel Pefect Patch issues DOSBox ECE r4356

Topic actions

First post, by johnnystarr

Posted on 
User metadata
Rank Newbie
Rank
Newbie

I'm trying my best to follow the instructions, but for some reason I cannot get "surfacepp" or "openglpp" to actually work.

In the PATCHES.txt notes I see:

+ Patch for pixel perfect scaling, created by Ant_222 (https://www.vogons.org/viewtopic.php?f=32&t=49160)

In the pixel perfect txt file i see

This  patch  adds  three  modes  of software scaling
based on the 'surface' output type and one  hardware
scaling mode based on the 'opengl' output type:

surfacepp (pixel-perfect):
   Each  emulated  pixel  is  represented as a sharp
   rectangle with  integral  dimensions  m x n  such
   that  m:n  approximates  the desired pixel aspect
   ratio (PAR), which depends on the emulated  reso-
   lution  and  the 'aspect' setting in the [render]
   section.  Whereas the  standard  PARs  are  them-
   selves  ratios  of small integers, this mode will
   yield the exact aspect ratio, provided the output
   resolution is high enough for the game.

So, in dosbox.conf I set:

output=surfacepp

Run DOSBox, and the output console says:

"surfacepp" is not a valid value for variable: output.

I realize these are "patches", but is there something else I need to do to enable these features?

It should also be noted that the dosbox.conf comments were never updated, notice my available options:

#           output: What video system to use for output.
#                     Possible values: surface, overlay, opengl, openglnb, ddraw.

Reply 2 of 3, by johnnystarr

Posted on 
User metadata
Rank Newbie
Rank
Newbie
xcomcmdr wrote on 2020-07-25, 09:14:

With modern versions of ECE, try to use the pixel-perfect opengl shader instead :
Re: DOSBox ECE (for Windows & Linux)

So I'm confused. The latest version of ECE says to use output. Why haven't they updated their documentation?

FWIW, I'm a professional developer. If the ECE source code was on Github I would open a pull request and call it a day 😀

Reply 3 of 3, by johnnystarr

Posted on 
User metadata
Rank Newbie
Rank
Newbie
xcomcmdr wrote on 2020-07-25, 09:14:

With modern versions of ECE, try to use the pixel-perfect opengl shader instead :
Re: DOSBox ECE (for Windows & Linux)

Also, FWIW

[sdl]
output           = openglnb

[render]
glshader  = pixel_perfect

Results in:

Shader file "pixel_perfect" not found.
Go to top of page Go to top of page
Back to DOSBox General
Close window
Close window