Luna::Font::IFontFile

Represents a font file that may contain one or multiple fonts.

interface Luna::Font::IFontFile : public virtual Interface

Base type

• Interface

Member functions

• virtual Span< const byte_t > get_data()=0

  Gets the data of the font file.

• virtual u32 get_num_fonts()=0

  Gets the number of fonts in the font file.

• virtual glyph_t find_glyph(u32 font_index, u32 codepoint)=0

  Gets the glyph index of the specified character in specified font.

• virtual f32 scale_for_pixel_height(u32 font_index, f32 pixels)=0

  Computes a scale factor to produce a font whose "height" is pixels tall.

• virtual void get_vmetrics(u32 font_index, i32 ascent, i32 descent, i32 *line_gap)=0

  Gets the metrics information for a font in the vertical side.

• virtual void get_glyph_hmetrics(u32 font_index, glyph_t glyph, i32 advance_width, i32 left_side_bearing)=0

  Gets the metrics information for a glyph in the horizontal side.

• virtual i32 get_kern_advance(u32 font_index, glyph_t ch1, glyph_t ch2)=0

  Gets an additional amount to add to the 'advance' value between ch1 and ch2.

• virtual void get_glyph_shape(u32 font_index, glyph_t glyph, Vector< i16 > &out_commands)=0

  Gets commands in order to draw the specified glyph in unscaled space.

• virtual RectI get_glyph_bounding_box(u32 font_index, glyph_t glyph)=0

  Gets the bounding box of the visible part of the glyph.

• virtual RectI get_glyph_bitmap_box(u32 font_index, glyph_t glyph, f32 scale_x, f32 scale_y, f32 shift_x, f32 shift_y)=0

  Gets the bounding box of the bitmap centered around the glyph origin.

• virtual void render_glyph_bitmap(u32 font_index, glyph_t glyph, void *output, i32 out_w, i32 out_h, i32 out_row_pitch, f32 scale_x, f32 scale_y, f32 shift_x, f32 shift_y)=0

  Renders a bitmap of the specified glyph into the buffer specified by the output., where out_w and out_h is the width and height.