FontParam details

[cool2bdave]

Hi,
I am overlaying text into a number of images of various resolutions. I would like to be able to scale the text to a percentage of the image width.

I have a vbs that uses the text file generated using

irfanview /info=textfile.txt

to determine the height and width of the image.

the first value in FontParam lets me change the font size, however I am unable to determine what the final text size will be.
Do any of the other options in FontParam let you scale the output to a number of pixels wide and high? what do the other options mean?

My ini file:

[BatchText]
AddText=Test text
TextCoord=151;807;768;1360
Corner=0
Orientation=0
TranspText=0
FontColor=16777215
TxtBgkr=0
FontParam=-105^|0^|0^|0^|400^|0^|0^|0^|0^|3^|2^|1^|18^|
Font=Times New Roman
[Batch]
AdvAddText=1

Thanks
David

[Bhikkhu Pesala]

The first parameter is the one you're interested in. It is the font size in pixels.

12 points = 16 pixels
72 points = 96 pixels etc.

The others, as far as I can tell, are about the font style, underline, strikeout, etc. You can save the settings from the batch dialogue to check the values.

[Foxy]

I can tell you only this:

FontParam=-13|0|0|0|700|0|0|0|0|1|2|1|49|
           ^  ^ ^ ^  ^  ^ ^ ^ ^ ^ ^ ^ ^
           A  B C D  E  F G H I J K L M

A: Font size (Example: ”-13” = Size 10)
B: (unknow function)
C: (unknow function)
D: (unknow function)
E: Font style: ”400” = standard, ”700” = bold
F: Font style: ”255” = italic
G: Text decoration: Underline; ”0” = off, ”1” = on
H: Text decoration: Line-through; ”0” = off, ”1” = on
I: Font script (Western European, Arabic, Greek, etc.)
J: (unknow function)
K: (unknow function)
L: (unknow function)
M: (unknow function)


I hope this will help.

[Bhikkhu Pesala]

Parameter "I" is the script — Western is the default

Orientation is the text alignment

0 = Left
1 = Centre
2 = Right

[cool2bdave]

Thanks for you answers, I am still looking into this.

I have measured the number of pixels for various parameter A values using Times New Roman

-105 = 72 pixels high, ratio 1:0.686
-100 = 69 pixels high, ratio 1:0.69
-72 = 50 pixels high, ratio 1:0.694
-50 = 35 pixels high, ratio 1:0.7

I could just use the ratio (parameter A)*0.7 to determine the height.

I am not sure about how to determine the with of font characters or the final width of my text string

[Mij]

If you use a fixed width font like Courier it is fairly easy to determine the size of the box to put it in.
For example N characters of 60 point text require 80 pixels high by 48*N wide.

If you want to use a variable width font like Times new Roman it is much more complicated though. This site describes a way to do it using VB.net but I have not come across a VB script equivalent.

[cool2bdave]

Thanks for the link. I considered writing an app to return the width or height of a string, but decided against it.

I have a small number of strings in this project so, I calculated the height-width ratio for each string and estimated the Irfanview Font Size as follows:

Eg:
Font = Times New Roman
StringText = "OT000 M1"

Manually measured Width:height = 465:72, ratio 1:0.155
Manually measured IrfanviewFontSize -105 = 72 pixels high, ratio 1:0.686

FontHeightPx= (DesiredWidthPx*0.155)
IrfanviewFontSize=FontHeightPx/0.686