font.c File Reference

Windows font handling and character encoding implementation. More...

#include "utils/config.h"
#include <assert.h>
#include <windows.h>
#include "netsurf/inttypes.h"
#include "utils/log.h"
#include "utils/nsoption.h"
#include "utils/utf8.h"
#include "netsurf/layout.h"
#include "netsurf/utf8.h"
#include "netsurf/plot_style.h"
#include "windows/font.h"

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Macros
#define	WSTRLEN   4096

Functions
nserror	utf8_to_font_encoding (const struct font_desc *font, const char *string, size_t len, char **result)
	convert from utf-8 to win32 font encoding. More...
static nserror	utf8_to_local_encoding (const char *string, size_t len, char **result)
	Convert a string to UCS2 from UTF8. More...
static nserror	utf8_from_local_encoding (const char *string, size_t len, char **result)
	Convert a string to UTF8 from local encoding. More...
HFONT	get_font (const plot_font_style_t *style)
static nserror	win32_font_width (const plot_font_style_t *style, const char *utf8str, size_t utf8len, int *width)
	Measure the width of a string. More...
static nserror	win32_font_position (const plot_font_style_t *style, const char *utf8str, size_t utf8len, int x, size_t *char_offset, int *actual_x)
	Find the position in a string where an x coordinate falls. More...
static nserror	win32_font_split (const plot_font_style_t *style, const char *string, size_t length, int x, size_t *offset, int *actual_x)
	Find where to split a string to make it fit a width. More...

Variables
HWND	font_hwnd
static struct gui_layout_table	layout_table
	win32 font operations table More...
struct gui_layout_table *	win32_layout_table = &layout_table
static struct gui_utf8_table	utf8_table
	win32 utf8 encoding operations table More...
struct gui_utf8_table *	win32_utf8_table = &utf8_table

Detailed Description

Windows font handling and character encoding implementation.

Definition in file font.c.

Macro Definition Documentation

WSTRLEN

#define WSTRLEN   4096

Definition at line 169 of file font.c.

Function Documentation

get_font()

HFONT get_font

(

const plot_font_style_t *

style

)

Definition at line 92 of file font.c.

References plot_font_style::family, plot_font_style::flags, font_hwnd, FONTF_ITALIC, nsoption_charp, PLOT_FONT_FAMILY_CURSIVE, PLOT_FONT_FAMILY_FANTASY, PLOT_FONT_FAMILY_MONOSPACE, PLOT_FONT_FAMILY_SANS_SERIF, PLOT_FONT_FAMILY_SERIF, PLOT_STYLE_SCALE, plot_font_style::size, and plot_font_style::weight.

Referenced by text(), win32_font_position(), and win32_font_width().

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utf8_from_local_encoding()

static nserror utf8_from_local_encoding ( const char *  string, size_t  len, char **  result  )

static

Convert a string to UTF8 from local encoding.

Parameters

[in]	string	source string
[in]	len	source string length
[out]	result	The UTF8 string

Definition at line 74 of file font.c.

References NSERROR_NOMEM, NSERROR_OK, result, and strndup().

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utf8_to_font_encoding()

nserror utf8_to_font_encoding	(	const struct font_desc *	font,
		const char *	string,
		size_t	len,
		char **	result
	)

convert from utf-8 to win32 font encoding.

Parameters

[in]	font	font descriptor
[in]	string	source utf-8 string
[in]	len	The length of the utf-8 data
[out]	result	The reencoded string.

Definition at line 43 of file font.c.

References font_desc::encoding, result, and utf8_to_enc().

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utf8_to_local_encoding()

static nserror utf8_to_local_encoding ( const char *  string, size_t  len, char **  result  )

static

Convert a string to UCS2 from UTF8.

Parameters

[in]	string	source string
[in]	len	source string length
[out]	result	The UCS2 string

Definition at line 60 of file font.c.

References result, and utf8_to_enc().

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win32_font_position()

static nserror win32_font_position ( const plot_font_style_t *  style, const char *  utf8str, size_t  utf8len, int  x, size_t *  char_offset, int *  actual_x  )

static

Find the position in a string where an x coordinate falls.

Parameters

style	css_style for this text, with style->font_size.size == CSS_FONT_SIZE_LENGTH
utf8str	string to measure encoded in UTF-8
utf8len	length of string
x	coordinate to search for
char_offset	updated to offset in string of actual_x, [0..length]
actual_x	updated to x coordinate of character closest to x

Returns

NSERROR_OK on success otherwise appropriate error code

Definition at line 238 of file font.c.

References get_font(), NSERROR_OK, and NSERROR_UNKNOWN.

Referenced by win32_font_split().

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win32_font_split()

static nserror win32_font_split ( const plot_font_style_t *  style, const char *  string, size_t  length, int  x, size_t *  offset, int *  actual_x  )

static

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

Parameters

	style	css_style for this text, with style->font_size.size == CSS_FONT_SIZE_LENGTH
	string	UTF-8 string to measure
	length	length of string
	x	width available
[out]	offset	updated to offset in string of actual_x, [0..length]
	actual_x	updated to x coordinate of character closest to x

Returns

NSERROR_OK on success otherwise appropriate error code

On exit, [char_offset == 0 || string[char_offset] == ' ' || char_offset == length]

Definition at line 296 of file font.c.

References NSERROR_OK, NSLOG, win32_font_position(), and win32_font_width().

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win32_font_width()

static nserror win32_font_width ( const plot_font_style_t *  style, const char *  utf8str, size_t  utf8len, int *  width  )

static

Measure the width of a string.

Parameters

[in]	style	plot style for this text
[in]	utf8str	string encoded in UTF-8 to measure
[in]	utf8len	length of string, in bytes
[out]	width	updated to width of string[0..length)

Returns

NSERROR_OK on success otherwise appropriate error code

Definition at line 182 of file font.c.

References get_font(), NSERROR_INVALID, NSERROR_NOSPACE, NSERROR_OK, width, and WSTRLEN.

Referenced by win32_font_split().

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Variable Documentation

font_hwnd

HWND font_hwnd

Definition at line 39 of file font.c.

Referenced by get_font(), and win32_window_create().

layout_table

struct gui_layout_table layout_table

static

Initial value:

= {
        .width = win32_font_width,
        .position = win32_font_position,
        .split = win32_font_split,
}

win32 font operations table

Definition at line 346 of file font.c.

utf8_table

struct gui_utf8_table utf8_table

static

Initial value:

= {
        .utf8_to_local = utf8_to_local_encoding,
        .local_to_utf8 = utf8_from_local_encoding,
}

win32 utf8 encoding operations table

Definition at line 355 of file font.c.

win32_layout_table

struct gui_layout_table* win32_layout_table = &layout_table

Definition at line 352 of file font.c.

Referenced by WinMain().

win32_utf8_table

struct gui_utf8_table* win32_utf8_table = &utf8_table

Definition at line 360 of file font.c.

Referenced by WinMain().