netsurf/riscos/font.c

214 lines
4.5 KiB
C

/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
*/
#include <assert.h>
#include <stdio.h>
#include "netsurf/css/css.h"
#include "netsurf/riscos/font.h"
#include "netsurf/utils/utils.h"
#include "netsurf/desktop/gui.h"
#include "netsurf/utils/log.h"
#include "oslib/font.h"
/**
* font id = font family * 4 + bold * 2 + slanted
* font family: 0 = sans-serif, 1 = serif, ...
*/
const char * const font_table[FONT_FAMILIES * 4] = {
/* sans-serif */
"Homerton.Medium\\ELatin1",
"Homerton.Medium.Oblique\\ELatin1",
"Homerton.Bold\\ELatin1",
"Homerton.Bold.Oblique\\ELatin1",
};
static void font_close(struct font_data *data);
/**
* functions
*/
unsigned long font_width(struct font_data *font, const char * text, unsigned int length)
{
int width;
os_error * error;
assert(font != 0 && text != 0);
if (length == 0)
return 0;
error = xfont_scan_string(font->handle, text,
font_GIVEN_FONT | font_KERN | font_GIVEN_LENGTH,
0x7fffffff, 0x7fffffff,
0,
0, length,
0, &width, 0, 0);
if (error != 0) {
fprintf(stderr, "%s\n", error->errmess);
die("font_scan_string failed");
}
return width / 800;
}
void font_position_in_string(const char* text, struct font_data* font,
unsigned int length, unsigned long x, int* char_offset, int* pixel_offset)
{
font_scan_block block;
char* split_point;
int x_out, y_out, length_out;
assert(font != 0 && text != 0);
block.space.x = block.space.y = 0;
block.letter.x = block.letter.y = 0;
block.split_char = -1;
xfont_scan_string(font->handle, text,
font_GIVEN_BLOCK | font_GIVEN_FONT | font_KERN | font_RETURN_CARET_POS | font_GIVEN_LENGTH,
ro_x_units(x) * 400,
0x7fffffff,
&block, 0, length,
&split_point, &x_out, &y_out, &length_out);
*char_offset = (int)(split_point - text);
*pixel_offset = browser_x_units(x_out / 400);
return;
}
struct font_set *font_new_set()
{
struct font_set *set = xcalloc(1, sizeof(*set));
unsigned int i;
for (i = 0; i < FONT_FAMILIES * 4; i++)
set->font[i] = 0;
return set;
}
struct font_data *font_open(struct font_set *set, struct css_style *style)
{
struct font_data *data;
unsigned int size = 16 * 11;
unsigned int f = 0;
assert(set != 0);
if (style->font_size.size == CSS_FONT_SIZE_LENGTH)
size = style->font_size.value.length.value * 16;
switch (style->font_weight) {
case CSS_FONT_WEIGHT_BOLD:
case CSS_FONT_WEIGHT_600:
case CSS_FONT_WEIGHT_700:
case CSS_FONT_WEIGHT_800:
case CSS_FONT_WEIGHT_900:
f += FONT_BOLD;
break;
default:
break;
}
switch (style->font_style) {
case CSS_FONT_STYLE_ITALIC:
case CSS_FONT_STYLE_OBLIQUE:
f += FONT_SLANTED;
break;
default:
break;
}
for (data = set->font[f]; data != 0; data = data->next)
if (data->size == size)
return data;
data = xcalloc(1, sizeof(*data));
{
font_f handle;
os_error *error;
LOG(("font_find_font '%s' %i", font_table[f], size));
error = xfont_find_font(font_table[f], size, size, 0, 0, &handle, 0, 0);
if (error != 0) {
fprintf(stderr, "%s\n", error->errmess);
die("font_find_font failed");
}
data->handle = handle;
}
data->size = size;
data->space_width = font_width(data, " ", 1);
data->next = set->font[f];
set->font[f] = data;
return data;
}
void font_free_set(struct font_set *set)
{
unsigned int i;
struct font_data *data, *next;
assert(set != 0);
for (i = 0; i < FONT_FAMILIES * 4; i++) {
for (data = set->font[i]; data != 0; data = next) {
next = data->next;
font_close(data);
}
}
free(set);
}
void font_close(struct font_data *data)
{
font_lose_font(data->handle);
free(data);
}
char * font_split(struct font_data *data, const char * text, unsigned int length,
unsigned int width, unsigned int *used_width)
{
os_error *error;
font_scan_block block;
char *split;
block.space.x = block.space.y = block.letter.x = block.letter.y = 0;
block.split_char = ' ';
error = xfont_scan_string(data->handle, text,
font_GIVEN_BLOCK | font_GIVEN_FONT | font_KERN | font_GIVEN_LENGTH,
ro_x_units(width) * 400, 0x7fffffff,
&block,
0,
length,
&split,
used_width, 0, 0);
if (error != 0) {
fprintf(stderr, "%s\n", error->errmess);
die("font_scan_string failed");
}
*used_width = browser_x_units(*used_width / 400);
return split;
}