Draw Curved Text

[wcleyton]

Hello!

How to draw curved text in Lazarus?

[felipemdc]

I'm not sure if it is supported. We support Font.Orientation to draw text at an angle (but in a streight line, not a curve). Using Font.Orientation and some geometry it should be possible to implement a function that draws each char at the right angle and position. Each char should be positioned in the curve in the line that tangents the curve in the point where the char is.

[typo]

I have just tested this example and it works fine.

http://www.angusj.com/delphitips/beziertext.php

[felipemdc]

ahaha, yes, exactly, it implements what I was talking about... by "not supported" I meant that there is no pre-made function in the LCL for it, but yet, you can just grab a function in the internet and it works =) good idea.

[typo]

Indeed, the basis of the linked example is changing the orientation.

[engkin]

Not all solutions are made equal. I prefer Jay Clegg's "Warping Text to a Bézier curves"

[taazz]

Yeah me too! Lost the link a couple of years back though thank you for supplying it . Have you converted the article to pascal code?

[engkin]

I think I did convert most of it using GDI+, let me dig and see if I can find it.

Edit:
I found the executable file. Check the attachment. Still need to find the source code.

[typo]

Any cross-platform solution?

[taazz]

Any cross-platform solution?

if engkin posts the source I'll convert it to cross platform otherwise you would have to wait until I convert the article to pascal my self.

[finalpatch]

guys you are sitting on this gold mine called aggpas without realizing it.
http://www.crossgl.com/aggpas/aggpas-demo.htm
scroll down to the example trans_curve1 and trans_curve2

[typo]

Any example of using this in Lazarus? The EXE demo does not help so much.

[engkin]

When I was working on it I was trying to solve a specific issue before I lost my interest. I wanted to merge the curves in cursive fonts when drawing the outline of text. Check the attached image. I found some version of the source code. Compiling it does not display proper results and the code looks horrible.

[finalpatch]

Any example of using this in Lazarus? The EXE demo does not help so much.

download aggpas from their website, the zip archive contains the full source code to all examples.
for programming you could just use the aggpas package shipped with lazarus.

[typo]

Attached a project with a simple cross-platform curved text demo.