I have some code rendering labels on a picture using Magick++ (Image::annotate method).
Almost all scripts are displayed correctly but I'm getting troubles with Devanagari and Arabic. These languages have several glyphs per symbol depending on symbol position in the word. In the resulting image each symbol is rendered as if it is the only symbol in the word, something like (for Arabic):
م رح ب ا
instead of
مرحبا
Is it possible to render the labels correctly?
Related
I'm rendering text with SkiaSharp for various platforms. I have problem with arabic script. I've created simple shaping routine and I have nicely connected glyphs. But diacritics is off completely.
Is there an easy way how to render/position diacritics? Like another table, which tells that after this char, put this glyph which represent diacritics in middle position, or something like that.
I'have tried HarfBuzzSharp, it's working ok, except Android (where it is returning zeros to all glyph positions).
I'm trying to manipulate and modify a large number of eps files output by a web service. I have the code in python to interface with the server, and to edit the images to within about 99% of where I want them.
My issue deals with trying to display special characters. I've tried outputting the desired unicode character, Ψ, directly into the eps file, but this is displayed as different characters in both Preview for Mac and Adobe Illustrator. From some googling, it seems like eps doesn't accept unicode characters. Fair enough...
My current solution is to try to change the font in the eps files. This works when I want to display the Ψ as a single character. I just switch the font, and then switch back. As below:
/Symbol findfont 10.5 scalefont setfont
-9.1 36.1557 moveto (Y) show
/Helvetica-Bold findfont 10.5 scalefont setfont
Where I'm having a problem is when I want to display a title on each image. The title would include a mix of Helvetica-Light and Symbol fonts, I would want it to display as ABC1-Ψ123. I can't figure out how to switch the font of a single character within a larger block of text. Currently the eps files are written as shown:
/Helvetica-Light findfont 12 scalefont setfont
-43.093 304.224 moveto (ABC1-Y123) show
I'd appreciate any help.
I have a font where unfortunately the numbers and letters are different heights. I need to display a reference code which is a mix of letters and numbers and the uneven heights of the characters looks jarring. Is it possible with core text (or another technology on iOS) to render certain characters with a slightly stretched height so that it looks even numbers and letters are displayed together.
E.g i have the string '23Rt59RQ' I need the 2,3,5,9 to be rendered with a larger height.
AFAICT, there's nothing in the CGContext API (which is what you'd want to use for laying out sets of glyphs) which would directly, easily facilitate this.
If it's really very important to use the font you are using, you could make separate calls to CGContextShowGlyphsAtPositions for alphabetic and numeral characters, calling CGContextSetFontSize each time so that the end result ends up matching, but this is a lot of overhead for just drawing text, and will probably result in undesirable performance.
My real advice would be to pick a better font so that this isn't even an issue :)
In the end of used regex to identify the character groups and then created an attributed string varying the font size in the font given in the NSFontAttributeName attribute according to which characters were to be displayed.
Kinda hacky but it had the desired effect.
If you include Unicode characters in an NSString, a lot of them will take on the color set for that text - they're just regular glyphs for that font so they're displayed like any other character. But there are some Unicode characters that are colored, for example GLOBE WITH MERIDIANS which is a blue gradient with shadows. But I have seen this same glyph elsewhere that's a simple black outline without a shadow, for example in the iOS keyboard. I would like to use that glyph, but without the adornments, and without having to create and use an image. I wondered if a different font would render it in a different format, and while iOSFonts.com does show different styles (bolder, italics), they're all blue. Is it possible to get the simple plain version?
Surely it is possible, because that appears to be exactly what Apple has implemented with a Tip. Notice the globe is the exact same color as the text and it's included in the string along with all the other characters. Surely that's not a UIImage?
Character in different fonts:
EDIT: The solution provided in the linked question doesn't work for this character, as the variant character appears to be the exact same as the original - blue with shadows.
Unfortunately, iOS doesn't have a monochrome globe symbol you can use; the only built-in font that includes U+1F310 GLOBE WITH MERIDIANS is Apple Color Emoji.
If you really want a font that renders this character as a simple black outline, you could package a copy of Symbola (downloadable here) into your app.
Alternatively, you could make a bitmap image with the icon you want and use NSTextAttachment to put it into an attributed string. Apple is likely doing something along these lines, as many of their Tips include symbols that are definitely not Unicode characters:
Mathematica appears to have difficulty horizontally aligning accents (e.g. bars, hats, and tildes) when placed on top of certain mathematical symbols.
Here's a simple example:
Using the AdjustmentBox typesetting construct (or Alt-Left/Right arrow in the frontend), one can manually adjust the relative horizontal position of the hat and the symbol j to produce the more aesthetically pleasing:
There are two problems here:
1). It is inconvenient and time-consuming to make these manual adjustments when this should really be the job of the typesetting engine proper. Indeed, LaTeX is able to position accents correctly over all of the standard symbols (roman and greek letter forms) without the need to manually tweak their relative positioning.
2). The relative re-positioning of the symbols using AdjustmentBox is lost when exporting the Notebook to PDF for printing and re-distribution.
Question:
Does anyone have any suggestions for a more convenient way (preferably automatic) to improve the typeset quality of formulas in Mathematica notebooks that use accents, that preferably will also survive export of the notebook document to PDF format before printing?
You can select " ĵ " from the Windows character map and paste it in.
Style[ĵ, Italic, 24, Bold, FontFamily -> "Times"]
Also you can assign it to an input alias (borrowing from Andrew Moylan)
n = SelectedNotebook[];
SetOptions[n,
InputAliases ->
Append[Options[n, InputAliases][[1, 2]], "j^" -> "ĵ"]]
Typing Escj^Esc produces ĵ.
Well, I do not think that this is possible.
You may ask Wolfram Research to include unicode character 0135 , i.e., they should add \[JHat], like
\[IHat]. Then italics display nicely.