mirrors/netsurf
1
0
Fork 0
mirror of https://github.com/netsurf-browser/netsurf synced 2024-11-28 17:23:09 +03:00
Code Issues Packages Projects Releases Wiki Activity
c7fab5b727
netsurf/riscos/font.c
John Mark Bell c7fab5b727 [project @ 2004-08-18 22:07:20 by jmb] 
Don't read screen origin when printing

svn path=/import/netsurf/; revision=1244
2004-08-18 22:07:20 +00:00

822 lines
23 KiB
C
Raw Blame History

/*
* 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 2004 James Bursa <bursa@users.sourceforge.net>
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2004 John Tytgat <John.Tytgat@aaug.net>
*/
/** \file
* Font handling (RISC OS implementation).
*
* The Font Manager is used to handle and render fonts.
*/
#include <assert.h>
#include <stdio.h>
#include "oslib/font.h"
#include "oslib/os.h"
#include "netsurf/css/css.h"
#include "netsurf/desktop/gui.h"
#include "netsurf/render/font.h"
#include "netsurf/riscos/gui.h"
#include "netsurf/riscos/options.h"
#include "netsurf/riscos/ufont.h"
#include "netsurf/utils/log.h"
#include "netsurf/utils/utils.h"
#define FONT_FAMILIES 5 /* Number of families */
#define FONT_FACES 8 /* Number of faces */
/* Font Variants */
#define FONT_SMALLCAPS 4
/* Font Styles */
#define FONT_BOLD 2
#define FONT_SLANTED 1
/* Font families */
#define FONT_SANS_SERIF (0 * FONT_FACES)
#define FONT_SERIF (1 * FONT_FACES)
#define FONT_MONOSPACE (2 * FONT_FACES)
#define FONT_CURSIVE (3 * FONT_FACES)
#define FONT_FANTASY (4 * FONT_FACES)
/* a font_set is just a linked list of font_data for each face for now */
struct font_set {
struct font_data *font[FONT_FAMILIES * FONT_FACES];
};
static os_error *nsfont_open_ufont(const char *fontNameP, const char *fbFontNameP, int size, int *handleP, bool *using_fb);
static os_error *nsfont_open_standard(const char *fontNameP, const char *fbFontNameP, int size, int *handleP, bool *using_fb);
/** Table of font names for UFont and an UTF-8 capable FontManager.
*
* font id = font family * 8 + smallcaps * 4 + bold * 2 + slanted
*
* font family: 0 = sans-serif, 1 = serif, 2 = monospace, 3 = cursive,
* 4 = fantasy.
* Font family 0 must be available as it is the replacement font when
* the other font families can not be found.
*/
static const char * const ufont_table[FONT_FAMILIES * FONT_FACES] = {
/* sans-serif */
/*0*/ "Homerton.Medium",
/*1*/ "Homerton.Medium.Oblique",
/*2*/ "Homerton.Bold",
/*3*/ "Homerton.Bold.Oblique",
"Homerton.Medium.SmallCaps",
"Homerton.Medium.Oblique.SmallCaps",
"Homerton.Bold.SmallCaps",
"Homerton.Bold.Oblique.SmallCaps",
/* serif */
/*8*/ "Trinity.Medium",
/*9*/ "Trinity.Medium.Italic",
/*10*/ "Trinity.Bold",
/*11*/ "Trinity.Bold.Italic",
"Trinity.Medium.SmallCaps",
"Trinity.Medium.Italic.SmallCaps",
"Trinity.Bold.SmallCaps",
"Trinity.Bold.Italic.SmallCaps",
/* monospace */
/*16*/ "Corpus.Medium",
/*17*/ "Corpus.Medium.Oblique",
/*18*/ "Corpus.Bold",
/*19*/ "Corpus.Bold.Oblique",
"Corpus.Medium.SmallCaps",
"Corpus.Medium.Oblique.SmallCaps",
"Corpus.Bold.SmallCaps",
"Corpus.Bold.Oblique.SmallCaps",
/* cursive */
/*24*/ "Churchill.Medium",
/*25*/ "Churchill.Medium.Oblique",
/*26*/ "Churchill.Bold",
/*27*/ "Churchill.Bold.Oblique",
"Churchill.Medium.SmallCaps",
"Churchill.Medium.Oblique.SmallCaps",
"Churchill.Bold.SmallCaps",
"Churchill.Bold.Oblique.SmallCaps",
/* fantasy */
/*32*/ "Sassoon.Primary",
/*33*/ "Sassoon.Primary.Oblique",
/*34*/ "Sassoon.Primary.Bold",
/*35*/ "Sassoon.Primary.Bold.Oblique",
"Sassoon.Primary.SmallCaps",
"Sassoon.Primary.Oblique.SmallCaps",
"Sassoon.Primary.Bold.SmallCaps",
"Sassoon.Primary.Bold.Oblique.SmallCaps",
};
/** Table of Latin1 encoded font names for a pre-UTF-8 capable FontManager.
*
* font id = font family * 8 + smallcaps * 4 + bold * 2 + slanted
*
* font family: 0 = sans-serif, 1 = serif, 2 = monospace, 3 = cursive,
* 4 = fantasy.
* Font family 0 must be available as it is the replacement font when
* the other font families can not be found.
*/
static const char * const font_table[FONT_FAMILIES * FONT_FACES] = {
/* sans-serif */
/*0*/ "Homerton.Medium\\ELatin1",
/*1*/ "Homerton.Medium.Oblique\\ELatin1",
/*2*/ "Homerton.Bold\\ELatin1",
/*3*/ "Homerton.Bold.Oblique\\ELatin1",
"Homerton.Medium.SmallCaps\\ELatin1",
"Homerton.Medium.SmallCaps\\ELatin1\\M65536 0 13930 65536 0 0",
"Homerton.Bold.SmallCaps\\ELatin1",
"Homerton.Bold.SmallCaps\\ELatin1\\M65536 0 13930 65536 0 0",
/* serif */
/*8*/ "Trinity.Medium\\ELatin1",
/*9*/ "Trinity.Medium.Italic\\ELatin1",
/*10*/ "Trinity.Bold\\ELatin1",
/*11*/ "Trinity.Bold.Italic\\ELatin1",
"Trinity.Medium.SmallCaps\\ELatin1",
"Trinity.Medium.Italic.SmallCaps\\ELatin1",
"Trinity.Bold.SmallCaps\\ELatin1",
"Trinity.Bold.Italic.SmallCaps\\ELatin1",
/* monospace */
/*16*/ "Corpus.Medium\\ELatin1",
/*17*/ "Corpus.Medium.Oblique\\ELatin1",
/*18*/ "Corpus.Bold\\ELatin1",
/*19*/ "Corpus.Bold.Oblique\\ELatin1",
"Corpus.Medium.SmallCaps\\ELatin1",
"Corpus.Medium.SmallCaps\\ELatin1\\M65536 0 13930 65536 0 0",
"Corpus.Bold.SmallCaps\\ELatin1",
"Corpus.Bold.SmallCaps\\ELatin1\\M65536 0 13930 65536 0 0",
/* cursive */
/*24*/ "Churchill.Medium\\ELatin1",
/*25*/ "Churchill.Medium\\ELatin1\\M65536 0 13930 65536 0 0",
/*26*/ "Churchill.Bold\\ELatin1",
/*27*/ "Churchill.Bold\\ELatin1\\M65536 0 13930 65536 0 0",
"Churchill.Medium.SmallCaps\\ELatin1",
"Churchill.Medium.SmallCaps\\ELatin1\\M65536 0 13930 65536 0 0",
"Churchill.Bold.SmallCaps\\ELatin1",
"Churchill.Bold.SmallCaps\\ELatin1\\M65536 0 13930 65536 0 0",
/* fantasy */
/*32*/ "Sassoon.Primary\\ELatin1",
/*33*/ "Sassoon.Primary\\ELatin1\\M65536 0 13930 65536 0 0",
/*34*/ "Sassoon.Primary.Bold\\ELatin1",
/*35*/ "Sassoon.Primary.Bold\\ELatin1\\M65536 0 13930 65536 0 0",
"Sassoon.Primary.SmallCaps\\ELatin1",
"Sassoon.Primary.SmallCaps\\ELatin1\\M65536 0 13930 65536 0 0",
"Sassoon.Primary.Bold.SmallCaps\\ELatin1",
"Sassoon.Primary.Bold.SmallCaps\\ELatin1\\M65536 0 13930 65536 0 0",
};
/**
* Create an empty font_set.
*
* \return an opaque struct font_set.
*/
struct font_set *nsfont_new_set(void)
{
struct font_set *set;
unsigned int i;
LOG(("nsfont_new_set()\n"));
if ((set = malloc(sizeof(*set))) == NULL)
return NULL;
for (i = 0; i < FONT_FAMILIES * FONT_FACES; i++)
set->font[i] = NULL;
return set;
}
/**
* Open a font for use based on a css_style.
*
* \param set a font_set, as returned by nsfont_new_set()
* \param style a css_style which describes the font
* \return a struct font_data, with an opaque font handle in handle
*
* The set is updated to include the font, if it was not present.
*/
struct font_data *nsfont_open(struct font_set *set, struct css_style *style)
{
struct font_data *data;
unsigned int size = option_font_size * 1.6;
unsigned int f = 0;
int fhandle;
os_error *error;
bool using_fb;
assert(set != NULL);
assert(style != NULL);
if (style->font_size.size == CSS_FONT_SIZE_LENGTH)
size = (int)(css_len2px(&style->font_size.value.length,
style) * 72.0 / 90.0 * 16.);
if (size < option_font_min_size * 1.6)
size = option_font_min_size * 1.6;
if (1600 < size)
size = 1600;
switch (style->font_family) {
case CSS_FONT_FAMILY_SANS_SERIF:
f += FONT_SANS_SERIF;
break;
case CSS_FONT_FAMILY_SERIF:
f += FONT_SERIF;
break;
case CSS_FONT_FAMILY_MONOSPACE:
f += FONT_MONOSPACE;
break;
case CSS_FONT_FAMILY_CURSIVE:
f += FONT_CURSIVE;
break;
case CSS_FONT_FAMILY_FANTASY:
f += FONT_FANTASY;
break;
default:
break;
}
switch (style->font_variant) {
case CSS_FONT_VARIANT_SMALL_CAPS:
f += FONT_SMALLCAPS;
break;
default:
break;
}
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 != NULL; data = data->next)
if (data->size == size)
return data;
if ((data = malloc(sizeof(*data))) == NULL)
return NULL;
/* Strategy : first try the UFont font code with given font name
* or the default font name if the former fails.
* If this still fails, try the use the default RISC OS font open
* in UTF-8 encoding (again first with given font name, then with
* the default font name).
* If this still fails, we repeat the previous step but now using
* the Latin 1 encoding.
*/
if ((error = nsfont_open_ufont(ufont_table[f], ufont_table[f % 4], (int)size, &fhandle, &using_fb)) != NULL) {
char fontName1[128], fontName2[128];
/* Go for the UTF-8 encoding with standard FontManager */
strcpy(fontName1, ufont_table[f]);
strcat(fontName1, "\\EUTF8");
strcpy(fontName2, ufont_table[f % 4]);
strcat(fontName2, "\\EUTF8");
if ((error = nsfont_open_standard(fontName1, fontName2, (int)size, &fhandle, &using_fb)) != NULL) {
/* All UTF-8 font methods failed, only support Latin 1 */
if ((error = nsfont_open_standard(font_table[f], font_table[f % 4], (int)size, &fhandle, &using_fb)) != NULL) {
LOG(("(u)font_find_font failed : %s\n", error->errmess));
die("(u)font_find_font failed");
}
data->ftype = FONTTYPE_STANDARD_LATIN1;
} else
data->ftype = FONTTYPE_STANDARD_UTF8ENC;
} else
data->ftype = FONTTYPE_UFONT;
data->id = (using_fb) ? f % 4 : f;
data->handle = fhandle;
data->size = size;
data->space_width = nsfont_width(data, " ", sizeof(" ")-1);
data->next = set->font[f];
set->font[f] = data;
return data;
}
/**
* Open font via UFont code.
*
* \param fontNameP UFont font name
* \param fbFontNameP fallback UFont font name
* \param size font size
* \param handle returning UFont handle in case there isn't an error.
* \param using_fb returning whether the fallback font was used or not.
* \return error in case there was one.
*/
static os_error *nsfont_open_ufont(const char *fontNameP, const char *fbFontNameP, int size, int *handleP, bool *using_fb)
{
os_error *errorP;
*handleP = 0; *using_fb = false;
if ((errorP = xufont_find_font(fontNameP, size, size, 0, 0, (ufont_f *)handleP, NULL, NULL)) == NULL)
return NULL;
LOG(("ufont_find_font(<%s>) failed <%s> (case 1)", fontNameP, errorP->errmess));
/* If the fallback font is the same as the first font name, return */
if (strcmp(fontNameP, fbFontNameP) == 0)
return errorP;
*using_fb = true;
if ((errorP = xufont_find_font(fbFontNameP, size, size, 0, 0, (ufont_f *)handleP, NULL, NULL)) == NULL)
return NULL;
LOG(("ufont_find_font(<%s>) failed <%s> (case 2)", fbFontNameP, errorP->errmess));
return errorP;
}
/**
* Open font via standard FontManager.
*
* \param fontNameP RISC OS font name
* \param fbFontNameP fallback RISC OS font name
* \param size font size
* \param handle RISC OS handle in case there isn't an error.
* \param using_fb returning whether the fallback font was used or not.
* \return error in case there was one.
*/
static os_error *nsfont_open_standard(const char *fontNameP, const char *fbFontNameP, int size, int *handleP, bool *using_fb)
{
os_error *errorP;
*handleP = 0; *using_fb = false;
if ((errorP = xfont_find_font(fontNameP, size, size, 0, 0, (font_f *)handleP, NULL, NULL)) == NULL)
return NULL;
LOG(("font_find_font(<%s>) failed <%s> (case 1)", fontNameP, errorP->errmess));
/* If the fallback font is the same as the first font name, return */
if (strcmp(fontNameP, fbFontNameP) == 0)
return errorP;
*using_fb = true;
if ((errorP = xfont_find_font(fbFontNameP, size, size, 0, 0, (font_f *)handleP, NULL, NULL)) == NULL)
return NULL;
LOG(("font_find_font(<%s>) failed <%s> (case 2)", fbFontNameP, errorP->errmess));
return errorP;
}
/**
* Frees all the fonts in a font_set.
*
* \param set a font_set as returned by nsfont_new_set()
*/
void nsfont_free_set(struct font_set *set)
{
unsigned int i;
LOG(("nsfont_free_set()\n"));
assert(set != NULL);
for (i = 0; i < FONT_FAMILIES * FONT_FACES; i++) {
struct font_data *data, *next;
for (data = set->font[i]; data != NULL; data = next) {
os_error *error;
next = data->next;
switch (data->ftype) {
case FONTTYPE_UFONT:
error = xufont_lose_font((ufont_f)data->handle);
break;
case FONTTYPE_STANDARD_UTF8ENC:
case FONTTYPE_STANDARD_LATIN1:
error = xfont_lose_font((font_f)data->handle);
break;
default:
assert(0);
break;
}
if (error != NULL)
LOG(("(u)font_lose_font() failed : 0x%x <%s>\n", error->errnum, error->errmess));
free(data);
}
}
free(set);
}
/**
* Find the width of some text in a font.
*
* \param font a font_data, as returned by nsfont_open()
* \param text string to measure
* \param length length of text
* \return width of text in pixels
*/
unsigned long nsfont_width(struct font_data *font, const char *text,
size_t length)
{
int width;
os_error *error;
assert(font != NULL && text != NULL);
if (length == 0)
return 0;
switch (font->ftype) {
case FONTTYPE_UFONT:
error = xufont_scan_string((ufont_f)font->handle,
text,
font_GIVEN_FONT
| font_KERN
| font_GIVEN_LENGTH,
0x7fffffff, 0x7fffffff,
NULL,
NULL, (int)length,
NULL, &width, NULL, NULL);
break;
case FONTTYPE_STANDARD_UTF8ENC:
error = xfont_scan_string((font_f)font->handle,
text,
font_GIVEN_FONT
| font_KERN
| font_GIVEN_LENGTH,
0x7fffffff, 0x7fffffff,
NULL,
NULL, (int)length,
NULL, &width, NULL, NULL);
break;
case FONTTYPE_STANDARD_LATIN1: {
const char *loc_text = cnv_strn_local_enc(text, length, NULL);
error = xfont_scan_string((font_f)font->handle,
loc_text,
font_GIVEN_FONT
| font_KERN,
0x7fffffff, 0x7fffffff,
NULL,
NULL, 0,
NULL, &width, NULL, NULL);
free((void *)loc_text);
break;
}
default:
assert(0);
break;
}
if (error != NULL) {
LOG(("(u)font_scan_string failed : %s\n", error->errmess));
die("nsfont_width: (u)font_scan_string failed");
}
return width / 800;
}
/**
* Find where in a string a x coordinate falls.
*
* For example, used to find where to position the caret in response to mouse
* click.
*
* \param font a font_data, as returned by nsfont_open()
* \param text a string
* \param length length of text
* \param x horizontal position in pixels
* \param char_offset updated to give the offset in the string
* \param pixel_offset updated to give the coordinate of the character in pixels
*/
void nsfont_position_in_string(struct font_data *font, const char *text,
size_t length, unsigned long x,
int *char_offset, int *pixel_offset)
{
os_error *error;
font_scan_block block;
const char *split;
int x_out;
assert(font != NULL && text != NULL);
block.space.x = block.space.y = block.letter.x = block.letter.y = 0;
block.split_char = -1;
switch (font->ftype) {
case FONTTYPE_UFONT:
error = xufont_scan_string((ufont_f)font->handle,
text,
font_GIVEN_BLOCK
| font_GIVEN_FONT
| font_KERN
| font_RETURN_CARET_POS
| font_GIVEN_LENGTH,
x * 2 * 400, 0x7fffffff,
&block, NULL, (int)length,
&split, &x_out, NULL, NULL);
break;
case FONTTYPE_STANDARD_UTF8ENC:
error = xfont_scan_string((font_f)font->handle,
text,
font_GIVEN_BLOCK
| font_GIVEN_FONT
| font_KERN
| font_RETURN_CARET_POS
| font_GIVEN_LENGTH,
x * 2 * 400, 0x7fffffff,
&block, NULL, (int)length,
&split, &x_out, NULL, NULL);
break;
case FONTTYPE_STANDARD_LATIN1: {
const ptrdiff_t *back_mapP;
const char *loc_text = cnv_strn_local_enc(text, length, &back_mapP);
error = xfont_scan_string((font_f)font->handle,
loc_text,
font_GIVEN_BLOCK
| font_GIVEN_FONT
| font_KERN
| font_RETURN_CARET_POS,
x * 2 * 400, 0x7fffffff,
&block, NULL, 0,
&split, &x_out, NULL, NULL);
split = &text[back_mapP[split - loc_text]];
free((void *)loc_text); free((void *)back_mapP);
break;
}
default:
assert(0);
break;
}
if (error != NULL) {
LOG(("(u)font_scan_string failed : %s\n", error->errmess));
die("nsfont_position_in_string: (u)font_scan_string failed");
}
*char_offset = (int)(split - text);
*pixel_offset = x_out / 800;
}
/**
* Find where to split a string to fit in a width.
*
* For example, used when wrapping paragraphs.
*
* \param font a font_data, as returned by nsfont_open()
* \param text string to split
* \param length length of text
* \param width available width
* \param used_width updated to actual width used
* \return pointer to character which does not fit
*/
char *nsfont_split(struct font_data *font, const char *text,
size_t length, unsigned int width, unsigned int *used_width)
{
os_error *error;
font_scan_block block;
const char *split;
assert(font != NULL && text != NULL);
block.space.x = block.space.y = block.letter.x = block.letter.y = 0;
block.split_char = ' ';
switch (font->ftype) {
case FONTTYPE_UFONT:
error = xufont_scan_string((ufont_f)font->handle,
text,
font_GIVEN_BLOCK
| font_GIVEN_FONT
| font_KERN
| font_GIVEN_LENGTH,
width * 2 * 400, 0x7fffffff,
&block,
NULL,
(int)length,
&split,
used_width, NULL, NULL);
break;
case FONTTYPE_STANDARD_UTF8ENC:
error = xfont_scan_string((font_f)font->handle,
text,
font_GIVEN_BLOCK
| font_GIVEN_FONT
| font_KERN
| font_GIVEN_LENGTH,
width * 2 * 400, 0x7fffffff,
&block,
NULL,
(int)length,
&split,
used_width, NULL, NULL);
break;
case FONTTYPE_STANDARD_LATIN1: {
const ptrdiff_t *back_mapP;
const char *loc_text = cnv_strn_local_enc(text, length, &back_mapP);
error = xfont_scan_string((font_f)font->handle,
loc_text,
font_GIVEN_BLOCK
| font_GIVEN_FONT
| font_KERN,
width * 2 * 400, 0x7fffffff,
&block,
NULL,
0,
&split,
used_width, NULL, NULL);
split = &text[back_mapP[split - loc_text]];
free((void *)loc_text); free((void *)back_mapP);
break;
}
default:
assert(0);
break;
}
if (error != NULL) {
LOG(("(u)font_scan_string failed : %s\n", error->errmess));
die("nsfont_split: (u)font_scan_string failed");
}
assert(split == &text[length] || *split == ' ');
*used_width = *used_width / 2 / 400;
return split;
}
void nsfont_paint(struct font_data *data, const char *text,
size_t length, int xpos, int ypos, void *trfm)
{
os_error *error;
unsigned int flags;
const int var_input[3] = {136, 137, -1}; /* XOrig, YOrig, Terminator */
int var_output[3];
bool background_blending = option_background_blending;
flags = font_OS_UNITS | font_GIVEN_FONT | font_KERN;
if (trfm != NULL)
flags |= font_GIVEN_TRFM;
/* font background blending (RO3.7+) */
if (ro_gui_current_redraw_gui)
background_blending = ro_gui_current_redraw_gui->option.background_blending;
if (background_blending) {
int version;
/* Font manager versions below 3.35 complain
* about this flag being set.
*/
error = xfont_cache_addr(&version, 0, 0);
/**\todo should we do anything else on error? */
if (!error && version >= 335)
flags |= font_BLEND_FONT;
}
assert(data != NULL);
assert(text != NULL);
/* adjust by the origin
* (not if printing as the result is undefined)
*/
if (!print_active) {
xos_read_vdu_variables((const os_vdu_var_list *)&var_input,
(int *)&var_output);
xpos += var_output[0];
ypos += var_output[1];
}
switch (data->ftype) {
case FONTTYPE_UFONT:
flags |= font_GIVEN_LENGTH;
error = xufont_paint((ufont_f)data->handle, text,
flags, xpos, ypos, NULL,
trfm, length);
break;
case FONTTYPE_STANDARD_UTF8ENC:
flags |= font_GIVEN_LENGTH;
error = xfont_paint((font_f)data->handle, text,
flags, xpos, ypos, NULL,
trfm, length);
break;
case FONTTYPE_STANDARD_LATIN1: {
const char *loc_text = cnv_strn_local_enc(text, length, NULL);
error = xfont_paint((font_f)data->handle, loc_text,
flags, xpos, ypos, NULL,
trfm, 0);
free((void *)loc_text);
break;
}
default:
assert(0);
break;
}
if (error != NULL) {
LOG(("(u)font_paint failed : %s\n", error->errmess));
die("nsfont_paint: (u)font_paint failed");
}
}
/**
* Given a text line, return the number of bytes which can be set using
* one RISC OS font and the bounding box fitting that part of the text
* only.
*
* \param font a font_data, as returned by nsfont_open()
* \param text string text. Does not have to be NUL terminated.
* \param length length in bytes of the text to consider.
* \param width returned width of the text which can be set with one RISC OS font. If 0, then error happened or initial text length was 0.
* \param rofontname returned name of the RISC OS font which can be used to set the text. If NULL, then error happened or initial text length was 0.
* \param rotext returned string containing the characters in returned RISC OS font. Not necessary NUL terminated. free() after use. If NULL, then error happened or initial text length was 0.
* \param rolength length of return rotext string. If 0, then error happened or initial text length was 0.
* \param consumed number of bytes of the given text which can be set with one RISC OS font. If 0, then error happened or initial text length was 0.
*/
void nsfont_txtenum(struct font_data *font, const char *text,
size_t length,
unsigned int *width,
const char **rofontname,
const char **rotext,
size_t *rolength,
size_t *consumed)
{
assert(font != NULL && text != NULL && rofontname != NULL && rotext != NULL && rolength != NULL && consumed != NULL);
*rotext = *rofontname = NULL;
*consumed = *rolength = *width = 0;
if (length == 0)
return;
switch (font->ftype) {
case FONTTYPE_UFONT:
(void)xufont_txtenum((ufont_f)font->handle,
text,
font_GIVEN_FONT
| font_KERN
| font_GIVEN_LENGTH,
length,
(int *)width,
rofontname,
rotext,
rolength,
consumed);
*width /= 800;
break;
case FONTTYPE_STANDARD_UTF8ENC: {
static char *fontname[128]; /** /todo: not nice */
int rowidth;
os_error *error;
error = xfont_scan_string((font_f)font->handle,
text,
font_GIVEN_FONT
| font_KERN
| font_GIVEN_LENGTH,
0x7fffffff, 0x7fffffff,
NULL,
NULL, (int)length,
NULL, &rowidth, NULL, NULL);
if (error != NULL)
return;
strcpy(fontname, ufont_table[font->id]);
strcat(fontname, "\\EUTF8");
if ((*rotext = strndup(text, length)) == NULL)
return;
*rolength = length;
*rofontname = fontname;
*consumed = length;
*width = (unsigned int)rowidth / 800;
break;
}
case FONTTYPE_STANDARD_LATIN1: {
int rowidth;
os_error *error;
if ((*rotext = cnv_strn_local_enc(text, length, NULL)) == NULL)
return;
error = xfont_scan_string((font_f)font->handle,
*rotext,
font_GIVEN_FONT
| font_KERN,
0x7fffffff, 0x7fffffff,
NULL,
NULL, 0,
NULL, &rowidth, NULL, NULL);
if (error != NULL) {
free((void *)*rotext); *rotext = NULL;
return;
}
*rolength = strlen(*rotext);
*rofontname = font_table[font->id];
*consumed = length;
*width = (unsigned int)rowidth / 800;
break;
}
default:
assert(0);
break;
}
}
Reference in New Issue View Git Blame Copy Permalink