Collaboration diagram for OpenGL text rendering:

Enumerations
enum	CVD::TEXT_STYLE { CVD::FILL = 0, CVD::OUTLINE = 1, CVD::NICE = 2, CVD::FILL = 0, CVD::OUTLINE = 1, CVD::NICE = 2 }
	different style for font rendering More...

enum	CVD::TEXT_STYLE { CVD::FILL = 0, CVD::OUTLINE = 1, CVD::NICE = 2, CVD::FILL = 0, CVD::OUTLINE = 1, CVD::NICE = 2 }
	different style for font rendering More...

Functions
void	CVD::glSetFont (const std::string &fontname)
	sets the font to use for future font rendering commands. More...

const std::string &	CVD::glGetFont ()
	returns the name of the currently active font

std::pair< double, double >	CVD::glDrawText (const std::string &text, enum TEXT_STYLE style=NICE, double spacing=1.5, double kerning=0.1)
	renders a string in GL using the current settings. More...

std::pair< double, double >	CVD::glGetExtends (const std::string &text, double spacing=1.5, double kerning=0.1)
	returns the size of the bounding box of a text to be rendered, similar to glDrawText but without any visual output

Detailed Description

Enumeration Type Documentation

◆ TEXT_STYLE [1/2]

enum CVD::TEXT_STYLE

different style for font rendering

Enumerator
FILL	renders glyphs as filled polygons
OUTLINE	renders glyphs as outlines with GL_LINES
NICE	renders glyphs filled with antialiased outlines
FILL	renders glyphs as filled polygons
OUTLINE	renders glyphs as outlines with GL_LINES
NICE	renders glyphs filled with antialiased outlines

◆ TEXT_STYLE [2/2]

enum CVD::TEXT_STYLE

different style for font rendering

Enumerator
FILL	renders glyphs as filled polygons
OUTLINE	renders glyphs as outlines with GL_LINES
NICE	renders glyphs filled with antialiased outlines
FILL	renders glyphs as filled polygons
OUTLINE	renders glyphs as outlines with GL_LINES
NICE	renders glyphs filled with antialiased outlines

Function Documentation

◆ glDrawText()

std::pair< double, double > CVD::glDrawText	(	const std::string &	text,
		enum TEXT_STYLE	style = `NICE`,
		double	spacing = `1.5`,
		double	kerning = `0.1`
	)

renders a string in GL using the current settings.

Font coordinates are +X along the line and +Y along the up direction of glyphs. The origin is at the top baseline at the left of the first character. Characters have a maximum size of 1. linefeed is interpreted as a new line and the start is offset in -Y direction by spacing . Individual characters are separated by kerning + plus their individual with.

Parameters

text	string to be rendered, unknown characters are replaced with '?'
style	rendering style
spacing	distance between individual text lines
kerning	distance between characters

◆ glSetFont()

void CVD::glSetFont ( const std::string & fontname )

sets the font to use for future font rendering commands.

currently sans, serif and mono are available.