TextMetrics | Python library which provides fast statistics | Analytics library

How can I get height between two red lines (top of div and top of current word font inside this div)?

I am writing a win32 low level gui app that emulates a console app. I use a fixed width font, my test uses Cascadia Mono, but I have the same issue with any fixed width font.

The console app is trying to draw a horizontal line using U2500 character.

I output the characters that app is passing me one by one. When I do that I get spaces between the horizontal lines, when I output in one call to textout those gaps are filled in.

I made this using the VS c++ windows app template and added this code to the WM_PAINT handling

From what I read importing both libraries seems to be the solution to a WebGL bug I ran into a bug and it seems like the accepted solution is to import like this:

I have an NSTextVIew in which I am only showing mono-spaced characters from the standard alphabet. So no numbers, special characters, emojis, etc. Each character equals one glyph. On top of the text I need to draw some shapes, and I am looking for a way to access some metrics from the text system:

1. the distance from one character to the next one
2. the distance from one line to the next one

See the picture for what I mean.

There don't seem to be any properties that I can use directly, or at least I haven't found them, so I am now use the text view's layoutManager to obtain these values:

For the first one I obtain the enclosing rects for two adjacent characters via the boundingRect(forGlyphRange glyphRange: NSRange, in container: NSTextContainer) -> NSRect method of the layoutmanager, and subtract the origin.x for both rects.

For the second one, I could use the same function, but then I need to know the range for the first character on the second line. Or iterate over all the characters and once the origin.y of the enclosing rect changes, I have the first character on the second line and I can calculate the distance between two lines.

EDIT : here's possible code using the layoutManager:

In Three.js it's best practice to keep textures to be a power of 2, and actually a requirement for some older Chrome browsers e.g. 32x32, 64x64 etc

Therefore I need to create a canvas texture of power of 2 dimensions, but I need to have that Sprite clickable, which means it needs to be cropped somehow.

Consider this example:

• Black bg is the Three.js renderer
• Red bg is the required size of a canvas (to power of 2)
• White bg is the size of the text

I would like to keep the texture at dimensions power of 2, but crop it to only show the white area. This is so the user can hover on the label for example. I don't want them hovering on the red area!

Windows GDI documentation clearly states that

All sizes are specified in logical units; that is, they depend on the current mapping mode of the display context.

When I do such thing inside WndProc:

I'm having a binding loop problem, the code actually works, but I want to get rid of these warnings.

If I return a constant value from the calculateMaxWidth() function, then no warnings, but as soon as I use TextMetrics things get bad. Interestingly, with every new cycle in the for loop I get more and more warnings. If I put the TextMetrics creation inside the for loop along with the destroy, I get a single warning for each measured text.

I have the following TextField as the inputfield which is linked to a virtual keyboard.

Related to TextMetrics and this question.

Is there a way to accurately align a rectangle to surround some enclosed text? The reason I would like to get pixel accurate alignment of the rectangle and the text is because I would like to paint the text next to some graphics, for example a plot.

Thanks to the answer below, I've almost got the text and the rectangle aligned, but it is still a few pixels off, and the alignment seems to vary across platforms. Screenshot is from OSX.