nomadchart.blogg.se - Font glyphs opengl

FONT GLYPHS OPENGL SERIES

The current texture unit's GL_TEXTURE_2D target will have texture object 0 bound to it.

Since the Font creates an OpenGL texture, calling this function will modify the following OpenGL state: Also, make sure that the OpenGL context is still active it must be the same context (or one shared with it) that was active when this function was called.

You are responsible for deleting the Font object yourself with delete. This function allocates the Font object with new. This function requires an active OpenGL context. More.Ĭreates a font with the given size and characteristics. Remember: this is a fixed-width font.Ĭreates a font with the given size and characteristics. Returns the width of each character, in pixels. Returns the baseline-to-baseline height of the font, in pixels.

FONT GLYPHS OPENGL SERIES

Generates a series of GlyphQuad's from a string of text. LayoutLine (boost::string_ref text, const glm::vec2 &ptReference, PointReference eRef= REF_BASELINE) const Retrieves a single glyph, given a Unicode codepoint. GetSingleGlyph (unsigned int codepoint, const glm::vec2 &ptReference, PointReference eRef= REF_BASELINE) const Retrieves the texture that contains the glyph images. If you want to have a top-down coordinate system, you will need to adjust the glyphs manually. Most important of all, you must ensure that this object does not outlive the OpenGL context that was active when glutil::GenerateFont was called.Īll layout functions of this class assume the standard OpenGL coordinate system: +Y goes up and +X right.

This means that deleting this class will destroy that texture. This class contains and manages an OpenGL texture. The destructor is not private you can (and should) call delete on this pointer. This class's constructors are private you must use glutil::GenerateFont to create an instance of this class. This font is a "bitmap" font the glyphs are stores as images in a texture. Characters outside of this range are not available. It contains characters only from the first 256 Unicode codepoints.

It also has functions for inspecting properties of the font (the height of lines, width of the characters, etc). This class contains functions to get the rendering information for a single glyph and a line of glyphs. The class that represents a series of glyphs as well as the information to layout a string of text.