Pixel Pefect Patch issues DOSBox ECE r4356 \ VOGONS

Pixel Pefect Patch issues DOSBox ECE r4356

Topic actions

First post, by johnnystarr

Posted on 2020-07-25, 01:36

johnnystarr Offline

Rank Newbie

Rank: Newbie
Posts: 30
Joined: 2017-11-11, 01:36

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:

1+ 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

1This  patch  adds  three  modes  of software scaling
2based on the 'surface' output type and one  hardware
3scaling mode based on the 'opengl' output type:
4
5surfacepp (pixel-perfect):
6   Each  emulated  pixel  is  represented as a sharp
7   rectangle with  integral  dimensions  m x n  such
8   that  m:n  approximates  the desired pixel aspect
9   ratio (PAR), which depends on the emulated  reso-
10   lution  and  the 'aspect' setting in the [render]
11   section.  Whereas the  standard  PARs  are  them-
12   selves  ratios  of small integers, this mode will
13   yield the exact aspect ratio, provided the output
14   resolution is high enough for the game.

So, in dosbox.conf I set:

1output=surfacepp

Run DOSBox, and the output console says:

1"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:

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

Reply 1 of 3, by xcomcmdr

Posted on 2020-07-25, 09:14

xcomcmdr Offline

Rank Oldbie

Rank: Oldbie
Posts: 1051
Joined: 2009-09-19, 01:03
Location: France

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

Reply 2 of 3, by johnnystarr

Posted on 2020-07-25, 14:18

johnnystarr Offline

Rank Newbie

Rank: Newbie
Posts: 30
Joined: 2017-11-11, 01:36

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 2020-07-25, 20:26

johnnystarr Offline

Rank Newbie

Rank: Newbie
Posts: 30
Joined: 2017-11-11, 01:36

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

1[sdl]
2output           = openglnb
3
4[render]
5glshader  = pixel_perfect

Results in:

1Shader file "pixel_perfect" not found.

Go to top of page Go to top of page

Back to DOSBox General