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07-11-18, 05:58 AM   #1
Basil2
A Deviate Faerie Dragon
Join Date: Feb 2015
Posts: 13
How to make pixel-accurate interface?

I am trying to output some pixels and have two problems.


1. Frame:SetSize(x, y) in real pixels is not exactly x and y.

I can compensate it by using Frame:SetScale(768/real_resolution). But how can I get <real_resolution> within addon?


2. I cannot set exact pixel color.

I have
Code:
function SetColor256(obj, r, g, b)
    obj:SetColorTexture(r/255, g/255, b/255)
end
However, when I call it like SetColor256(1, 2, 3), real pixel might have (0, 1, 3). Or (1,2,3) as planned. Why? How to compensate it?
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07-11-18, 12:38 PM   #2
Tim
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Take a look at ElvUI's way..

https://git.tukui.org/elvui/elvui/bl...xelperfect.lua
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07-11-18, 01:35 PM   #3
runamonk
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Originally Posted by Basil2 View Post
I am trying to output some pixels and have two problems.


1. Frame:SetSize(x, y) in real pixels is not exactly x and y.

I can compensate it by using Frame:SetScale(768/real_resolution). But how can I get <real_resolution> within addon?


2. I cannot set exact pixel color.

I have
Code:
function SetColor256(obj, r, g, b)
    obj:SetColorTexture(r/255, g/255, b/255)
end
However, when I call it like SetColor256(1, 2, 3), real pixel might have (0, 1, 3). Or (1,2,3) as planned. Why? How to compensate it?
Check out oUF.
and
Check out oUF p3lim
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07-11-18, 10:39 PM   #4
elcius
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Most of the sub pixel issues in wow stem from loss of precision on frame dimensions & position, check the actual position and size of whatever you're having issues with, most likely there will be floating point errors, textures will go through the filter if they are not correctly positioned & scaled.
the issue is most noticeable in text (as text does not filter, it just floors the position).
for example, take the ElvUI options window (or any frame with a lot of text anchored to it) and drag it around slowly, you'll notice the text shifts up & down.
then increase the width & height of the frame by 0.01, and you'll notice the text stops wiggling and all the textures sharpen up.

It's also worth mentioning that you can put your textures and shit directly in WorldFrame to avoid ui scaling.

Last edited by elcius : 07-11-18 at 10:46 PM.
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08-28-18, 06:01 AM   #5
Basil2
A Deviate Faerie Dragon
Join Date: Feb 2015
Posts: 13
Tnank you for answers, the problems were solved:

1: By using GetPhysicalScreenSize()

2: By using the following code:

Code:
local function SetColor256(obj, r, g, b)
    local function to01(value0255)
        if (value0255 ~= 255) then
            value0255 = value0255 + 0.4
        end
        return value0255 / 255
    end
    obj:SetColorTexture(to01(r), to01(g), to01(b))
end
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08-28-18, 09:21 AM   #6
p3lim
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From https://github.com/p3lim-wow/Inomena...er/scaling.lua

Lua Code:
  1. function E:PLAYER_LOGIN()
  2.     local width, height = GetPhysicalScreenSize()
  3.     if((768 / height) < (768 / 1200)) then
  4.         -- Game can't scale further than 0.64
  5.         -- Instead we change the UI scale to 1 and the UIParent scale to the correct one
  6.         SetCVar('useuiscale', 1)
  7.         SetCVar('uiscale', 1)
  8.         UIParent:SetScale(768 / height)
  9.     else
  10.         SetCVar('useuiscale', 0)
  11.     end
  12. end
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