#include <inttypes.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include "utils/nsoption.h"
#include "utils/utils.h"
#include "utils/utf8.h"
#include "netsurf/utf8.h"
#include "netsurf/layout.h"
#include "netsurf/plot_style.h"
#include "framebuffer/gui.h"
#include "framebuffer/font.h"
#include <font-ns-sans.h>

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Macros
#define	GLYPH_LEN 16

#define	SEVEN_SET

#define	THREE_SSS ((1 << 0) \| (1 << 1) \| (1 << 2))

#define	THREE_S_S ((1 << 0) \| (1 << 2))

#define	THREE__SS ((1 << 0) \| (1 << 1) )

#define	THREE_SS_ ( (1 << 1) \| (1 << 2))

#define	THREE_S__ (1 << 2)

#define	THREE__S_ (1 << 1)

#define	THREE___S (1 << 0)

Functions
static uint8_t *	get_codepoint (uint32_t id, bool italic)

bool	fb_font_init (void)
	Initialise framebuffer font handling. More...

bool	fb_font_finalise (void)
	Finalise framebuffer font handling. More...

enum fb_font_style	fb_get_font_style (const plot_font_style_t *fstyle)

int	fb_get_font_size (const plot_font_style_t *fstyle)

static const uint8_t *	glyph_scale_2 (const uint8_t *glyph_data)

const uint8_t *	fb_get_glyph (uint32_t ucs4, enum fb_font_style style, int scale)

static nserror	utf8_to_local (const char string, size_t len, char *result)

static nserror	utf8_from_local (const char string, size_t len, char *result)

nserror	fb_font_width (const plot_font_style_t fstyle, const char string, size_t length, int *width)

nserror	fb_font_position (const plot_font_style_t fstyle, const char string, size_t length, int x, size_t char_offset, int actual_x)

static nserror	fb_font_split (const plot_font_style_t fstyle, const char string, size_t length, int x, size_t char_offset, int actual_x)
	Find where to split a string to make it fit a width. More...

Variables
uint8_t	code_point [GLYPH_LEN]

uint8_t	glyph_x2 [GLYPH_LEN *4]

uint8_t	frag [16][5]

const uint8_t	glyph_lut [16]
	Lookup table to scale 4 bits to 8 bits, so e.g. More...

static struct gui_layout_table	layout_table

struct gui_layout_table *	framebuffer_layout_table = &layout_table

static struct gui_utf8_table	utf8_table

struct gui_utf8_table *	framebuffer_utf8_table = &utf8_table

Macro Definition Documentation

◆ GLYPH_LEN

#define GLYPH_LEN 16

Definition at line 37 of file font_internal.c.

◆ SEVEN_SET

#define SEVEN_SET

Value:

((1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) | \

(1 << 4) | (1 << 5) | (1 << 6))

Definition at line 42 of file font_internal.c.

◆ THREE___S

#define THREE___S (1 << 0)

Definition at line 51 of file font_internal.c.

◆ THREE__S_

#define THREE__S_ (1 << 1)

Definition at line 50 of file font_internal.c.

◆ THREE__SS

#define THREE__SS ((1 << 0) | (1 << 1) )

Definition at line 47 of file font_internal.c.

◆ THREE_S__

#define THREE_S__ (1 << 2)

Definition at line 49 of file font_internal.c.

◆ THREE_S_S

#define THREE_S_S ((1 << 0) | (1 << 2))

Definition at line 46 of file font_internal.c.

◆ THREE_SS_

#define THREE_SS_ ( (1 << 1) | (1 << 2))

Definition at line 48 of file font_internal.c.

◆ THREE_SSS

#define THREE_SSS ((1 << 0) | (1 << 1) | (1 << 2))

Definition at line 45 of file font_internal.c.

Function Documentation

◆ fb_font_finalise()

bool fb_font_finalise ( void )

Finalise framebuffer font handling.

Definition at line 193 of file font_internal.c.

References FB_FACE_COUNT, fb_faces, ft_cmanager, and library.

Referenced by main().

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◆ fb_font_init()

bool fb_font_init ( void )

Initialise framebuffer font handling.

Definition at line 188 of file font_internal.c.

References CACHE_MIN_SIZE, FB_FACE_CURSIVE, FB_FACE_FANTASY, FB_FACE_MONOSPACE, FB_FACE_MONOSPACE_BOLD, FB_FACE_SANS_SERIF, FB_FACE_SANS_SERIF_BOLD, FB_FACE_SANS_SERIF_ITALIC, FB_FACE_SANS_SERIF_ITALIC_BOLD, FB_FACE_SERIF, FB_FACE_SERIF_BOLD, fb_faces, fb_new_face(), ft_cmanager, ft_cmap_cache, ft_face_requester(), ft_image_cache, ft_load_type, library, NSLOG, nsoption_bool, nsoption_charp, and nsoption_int.

Referenced by main().

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◆ fb_font_position()

nserror fb_font_position	(	const plot_font_style_t *	fstyle,
		const char *	string,
		size_t	length,
		int	x,
		size_t *	char_offset,
		int *	actual_x
	)

Definition at line 383 of file font_internal.c.

References codepoint_displayable, FB_FONT_WIDTH, fb_get_font_size(), NSERROR_OK, utf8_next(), utf8_to_ucs4(), and width.

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◆ fb_font_split()

static nserror fb_font_split	(	const plot_font_style_t *	fstyle,
		const char *	string,
		size_t	length,
		int	x,
		size_t *	char_offset,
		int *	actual_x
	)

static

Find where to split a string to make it fit a width.

Parameters

fstyle	style for this text
string	UTF-8 string to measure
length	length of string, in bytes
x	width available
char_offset	updated to offset in string of actual_x, [1..length]
actual_x	updated to x coordinate of character closest to x

Returns: true on success, false on error and error reported

On exit, char_offset indicates first character after split point.

Note: char_offset of 0 should never be returned.

Returns: char_offset giving split point closest to x, where actual_x <= x else char_offset giving split point closest to x, where actual_x > x

Returning char_offset == length means no split possible

Definition at line 437 of file font_internal.c.

References codepoint_displayable, FB_FONT_WIDTH, fb_get_font_size(), NSERROR_OK, utf8_next(), utf8_to_ucs4(), and width.

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◆ fb_font_width()

nserror fb_font_width	(	const plot_font_style_t *	fstyle,
		const char *	string,
		size_t	length,
		int *	width
	)

Definition at line 358 of file font_internal.c.

References codepoint_displayable, FB_FONT_WIDTH, fb_get_font_size(), NSERROR_OK, utf8_next(), utf8_to_ucs4(), and width.

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◆ fb_get_font_size()

int fb_get_font_size ( const plot_font_style_t * fstyle )

Definition at line 212 of file font_internal.c.

References nsoption_int, PLOT_STYLE_SCALE, and plot_font_style::size.

Referenced by fb_font_position(), fb_font_split(), fb_font_width(), and framebuffer_plot_text().

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◆ fb_get_font_style()

enum fb_font_style fb_get_font_style ( const plot_font_style_t * fstyle )

Definition at line 199 of file font_internal.c.

References FB_BOLD, FB_ITALIC, FB_REGULAR, plot_font_style::flags, FONTF_ITALIC, FONTF_OBLIQUE, and plot_font_style::weight.

Referenced by framebuffer_plot_text().

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◆ fb_get_glyph()

const uint8_t * fb_get_glyph	(	uint32_t	ucs4,
		enum fb_font_style	style,
		int	scale
	)

Definition at line 250 of file font_internal.c.

References fallthrough, FB_BOLD, FB_BOLD_ITALIC, FB_ITALIC, FB_REGULAR, get_codepoint(), and glyph_scale_2().

Referenced by framebuffer_plot_text().

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◆ get_codepoint()

static uint8_t * get_codepoint	(	uint32_t	id,
		bool	italic
	)

static

Definition at line 151 of file font_internal.c.

References code_point, frag, and SEVEN_SET.

Referenced by fb_get_glyph().

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◆ glyph_scale_2()

static const uint8_t * glyph_scale_2 ( const uint8_t * glyph_data )

static

Definition at line 234 of file font_internal.c.

References GLYPH_LEN, glyph_lut, and glyph_x2.

Referenced by fb_get_glyph().

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◆ utf8_from_local()

static nserror utf8_from_local	(	const char *	string,
		size_t	len,
		char **	result
	)

static

Definition at line 339 of file font_internal.c.

References NSERROR_NOMEM, NSERROR_OK, and result.

◆ utf8_to_local()

static nserror utf8_to_local	(	const char *	string,
		size_t	len,
		char **	result
	)

static

Definition at line 331 of file font_internal.c.

References result, and utf8_to_enc().

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Variable Documentation

◆ code_point

uint8_t code_point[GLYPH_LEN]

Definition at line 39 of file font_internal.c.

Referenced by get_codepoint().

◆ frag

uint8_t frag[16][5]

Definition at line 53 of file font_internal.c.

Referenced by get_codepoint().

◆ framebuffer_layout_table

struct gui_layout_table* framebuffer_layout_table = &layout_table

Definition at line 486 of file font_internal.c.

Referenced by main().

◆ framebuffer_utf8_table

struct gui_utf8_table* framebuffer_utf8_table = &utf8_table

Definition at line 494 of file font_internal.c.

Referenced by main().

◆ glyph_lut

const uint8_t glyph_lut[16]

Initial value:

= {
                0x00, 0x03, 0x0c, 0x0f,
                0x30, 0x33, 0x3c, 0x3f,
                0xc0, 0xc3, 0xcc, 0xcf,
                0xf0, 0xf3, 0xfc, 0xff
}

Lookup table to scale 4 bits to 8 bits, so e.g.

0101 --> 00110011

Definition at line 226 of file font_internal.c.

Referenced by glyph_scale_2().

◆ glyph_x2

uint8_t glyph_x2[GLYPH_LEN *4]

Definition at line 40 of file font_internal.c.

Referenced by glyph_scale_2().

◆ layout_table

struct gui_layout_table layout_table

static

Initial value:

= {
        .width = fb_font_width,
        .position = fb_font_position,
        .split = fb_font_split,
}

Definition at line 480 of file font_internal.c.

◆ utf8_table

struct gui_utf8_table utf8_table

static

Initial value:

= {
        .utf8_to_local = utf8_to_local,
        .local_to_utf8 = utf8_from_local,
}

Definition at line 489 of file font_internal.c.

Macros

Functions

Variables

Macro Definition Documentation

◆ GLYPH_LEN

◆ SEVEN_SET

◆ THREE___S

◆ THREE__S_

◆ THREE__SS

◆ THREE_S__

◆ THREE_S_S

◆ THREE_SS_

◆ THREE_SSS

Function Documentation

◆ fb_font_finalise()

◆ fb_font_init()

◆ fb_font_position()

◆ fb_font_split()

◆ fb_font_width()

◆ fb_get_font_size()

◆ fb_get_font_style()

◆ fb_get_glyph()

◆ get_codepoint()

◆ glyph_scale_2()

◆ utf8_from_local()

◆ utf8_to_local()

Variable Documentation

◆ code_point

◆ frag

◆ framebuffer_layout_table

◆ framebuffer_utf8_table

◆ glyph_lut

◆ glyph_x2

◆ layout_table

◆ utf8_table