font_freetype_methods Struct Reference

#include <font_freetype.h>

Data Fields
void(*	destroy )(void)
struct font_freetype_font *(*	font_new )(struct graphics_priv *gr, struct graphics_font_methods *meth, char *font, int size, int flags)
	Load a font, preferring one with the given font family. More...
void(*	get_text_bbox )(struct graphics_priv *gr, struct font_freetype_font *font, char *text, int dx, int dy, struct point *ret, int estimate)
struct font_freetype_text *(*	text_new )(char *text, struct font_freetype_font *font, int dx, int dy)
void(*	text_destroy )(struct font_freetype_text *text)
int(*	get_shadow )(struct font_freetype_glyph *glyph, unsigned char *data, int stride, struct color *fg, struct color *tr)
	Get glyph "shadow", a glyph bitmap to be used as background. More...
int(*	get_glyph )(struct font_freetype_glyph *glyph, unsigned char *data, int stride, struct color *fg, struct color *bg, struct color *tr)
	Get a glyph bitmap. More...

Detailed Description

Methods provided by this plugin.

Field Documentation

destroy

void(* font_freetype_methods::destroy) (void)

Referenced by graphics_destroy().

font_new

struct font_freetype_font*(* font_freetype_methods::font_new) (struct graphics_priv *gr, struct graphics_font_methods *meth, char *font, int size, int flags)

Load a font, preferring one with the given font family.

Try to load a font, trying to match either the given font family, or one from a list of hardcoded families, or let fontconfig pick the best match.

Parameters

graphics_priv	unused
graphics_font_methods	used to return font methods
fontfamily	the preferred font family
size	requested size of font
flags	extra flags for the font (bold,etc)

Returns

loaded font, or NULL

Referenced by graphics_gd_new(), graphics_qt5_new(), graphics_qt_qpainter_new(), and overlay_new().

get_glyph

int(* font_freetype_methods::get_glyph) (struct font_freetype_glyph *glyph, unsigned char *data, int stride, struct color *fg, struct color *bg, struct color *tr)

Get a glyph bitmap.

This method returns a bitmap for rendering the supplied glyph.

Parameters

g	glyph to render, usually obtained from a struct font_freetype_text created via font_freetype_methods.text_new()
data	buffer for result image bitmap. Size must be at least (4 * stride * g->h).
stride	stride (bytes per data row) for result bitmap; must be at least g->w, but may include padding. Special case: If set to 0, 'data' is interpreted as an array of pointers to image data rows (i.e. unsigned char**).
fg	color for rendering the glyph
bg	color to alpha blend with fg for semi-transparent glyph pixels
transparent	color for background pixels

Returns

0 if depth is invalid, 1 otherwise

Referenced by display_text_draw(), and draw_text().

get_shadow

int(* font_freetype_methods::get_shadow) (struct font_freetype_glyph *glyph, unsigned char *data, int stride, struct color *fg, struct color *tr)

Get glyph "shadow", a glyph bitmap to be used as background.

This method returns a glyph shadow, a bitmap with the glyph, where the glyph has been "fattened" by expanding it by one pixel on each side. In Navit, the shadow is used as the background behind the glyph bitmaps (returned by font_freetype_methods.get_glyph() ), to make the text easier to read.

Parameters

g	glyph to render, usually created via font_freetype_methods.text_new()
data	buffer for result image bitmap. Size must be at least (4 * stride * (g->h+2)).
stride	see font_freetype_methods.get_glyph(). Minimum: g->w+2.
foreground	color for rendering the "shadow"
background	color for rest of the bitmap (typically set to transparent)

Returns

0 if depth is invalid, 1 otherwise

Referenced by display_text_draw(), and draw_text().

get_text_bbox

void(* font_freetype_methods::get_text_bbox) (struct graphics_priv *gr, struct font_freetype_font *font, char *text, int dx, int dy, struct point *ret, int estimate)

Referenced by graphics_gd_new(), graphics_qt5_new(), graphics_qt_qpainter_new(), and overlay_new().

text_destroy

void(* font_freetype_methods::text_destroy) (struct font_freetype_text *text)

Referenced by draw_text().

text_new

struct font_freetype_text*(* font_freetype_methods::text_new) (char *text, struct font_freetype_font *font, int dx, int dy)

Referenced by draw_text().

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The documentation for this struct was generated from the following file:

• font/freetype/font_freetype.h