Degree sign doesn't get rendered

[BrainStone]

Whenever I try to render text containing the degree sign (°), everything after it isn't rendered anymore. What could be the cause of that?

[steverpi]

Could be same as when using micro symbol (mu) µ which is not 8-bit encoding. May work if you set localisation - just a suggestion:

#include <locale.h> // For use with multi-byte parsing routines (extended char sets other than 7-bit ascii) otherwise
// will return an empty string if you pass a string with a char val > 127
setlocale(LC_ALL, "") ; // Set locale for everything

[BrainStone]

Hm. I already set an specify locale so special chars get rendered correctly. I'll see if I can get it working. But that's a great point to start.

[ajstarks]

That's odd. Are you using the C library or Go wrapper?

I have a specific app that uses the degree symbol, twh (https://github.com/ajstarks/openvg/blob/master/go-client/twh/twh.go)

[BrainStone]

I'm using the C library in a C++ project.
Specifically this project: https://github.com/BrainStone/HelmutMobil

Examples:

• https://github.com/BrainStone/HelmutMobil/blob/master/HelmutMobil/GUI.cpp#L226
• https://github.com/BrainStone/HelmutMobil/blob/master/HelmutMobil/GUI.cpp#L173-L175

[wasalm]

Turns out that the degree sign is not part of the Dejavusans font.
You need to find a font which contains the degree sign and turn it into c++ code with font2openvg.

If you are interested, I already compiled some weather symbols into c++.
It originated from weathericons.io (some may be reordered)
You can download it from http://www.andries-salm.com/weatherIcons.cpp

[ajstarks]

Degree is in indeed in the default font. This program:

// first OpenVG program
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "VG/openvg.h"
#include "VG/vgu.h"
#include "fontinfo.h"
#include "shapes.h"

int main() {
	int width, height;
	char s[3];
	init(&width, &height);				   // Graphics initialization

	Start(width, height);				   // Start the picture
	Background(0, 0, 0);				   // Black background
	Fill(44, 77, 232, 1);				   // Big blue marble
	Circle(width / 2, 0, width);			   // The "world"
	Fill(255, 255, 255, 1);				   // White text

	TextMid(width / 2, (height * 0.7), "100 °C", SerifTypeface, width/15); 
	End();						   // End the picture

	fgets(s, 2, stdin);				   // look at the pic, end with [RETURN]
	finish();					   // Graphics cleanup
	exit(0);
}