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/*
* 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 2005 James Bursa <bursa@users.sourceforge.net>
*/
/** \file
* Font handling (RISC OS implementation).
*
* The RUfl is used handle and render fonts.
*/
#include <assert.h>
#include "rufl.h"
#include "netsurf/css/css.h"
#include "netsurf/render/font.h"
#include "netsurf/riscos/gui.h"
#include "netsurf/riscos/options.h"
#include "netsurf/utils/log.h"
static void nsfont_read_style(const struct css_style *style,
const char **font_family, unsigned int *font_size,
rufl_style *font_style);
/**
* Measure the width of a string.
*
* \param style css_style for this text, with style->font_size.size ==
* CSS_FONT_SIZE_LENGTH
* \param string UTF-8 string to measure
* \param length length of string
* \param width updated to width of string[0..length)
* \return true on success, false on error and error reported
*/
bool nsfont_width(const struct css_style *style,
const char *string, size_t length,
int *width)
{
const char *font_family;
unsigned int font_size;
rufl_style font_style;
rufl_code code;
nsfont_read_style(style, &font_family, &font_size, &font_style);
code = rufl_width(font_family, font_style, font_size,
string, length,
width);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR)
LOG(("rufl_width: rufl_FONT_MANAGER_ERROR: 0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess));
else
LOG(("rufl_width: 0x%x", code));
/* warn_user("MiscError", "font error"); */
return false;
}
*width /= 2;
return true;
}
/**
* Find the position in a string where an x coordinate falls.
*
* \param style css_style for this text, with style->font_size.size ==
* CSS_FONT_SIZE_LENGTH
* \param string UTF-8 string to measure
* \param length length of string
* \param x x coordinate to search for
* \param char_offset updated to offset in string of actual_x, [0..length]
* \param actual_x updated to x coordinate of character closest to x
* \return true on success, false on error and error reported
*/
bool nsfont_position_in_string(const struct css_style *style,
const char *string, size_t length,
int x, size_t *char_offset, int *actual_x)
{
const char *font_family;
unsigned int font_size;
rufl_style font_style;
rufl_code code;
nsfont_read_style(style, &font_family, &font_size, &font_style);
code = rufl_x_to_offset(font_family, font_style, font_size,
string, length,
x * 2, char_offset, actual_x);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR)
LOG(("rufl_x_to_offset: rufl_FONT_MANAGER_ERROR: "
"0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess));
else
LOG(("rufl_x_to_offset: 0x%x", code));
/* warn_user("MiscError", "font error"); */
return false;
}
*actual_x /= 2;
return true;
}
/**
* Find where to split a string to make it fit a width.
*
* \param style css_style for this text, with style->font_size.size ==
* CSS_FONT_SIZE_LENGTH
* \param string UTF-8 string to measure
* \param length length of string
* \param x width available
* \param char_offset updated to offset in string of actual_x, [0..length]
* \param actual_x updated to x coordinate of character closest to x
* \return true on success, false on error and error reported
*
* On exit, [char_offset == 0 ||
* string[char_offset] == ' ' ||
* char_offset == length]
*/
bool nsfont_split(const struct css_style *style,
const char *string, size_t length,
int x, size_t *char_offset, int *actual_x)
{
const char *font_family;
unsigned int font_size;
rufl_style font_style;
rufl_code code;
nsfont_read_style(style, &font_family, &font_size, &font_style);
code = rufl_x_to_offset(font_family, font_style, font_size,
string, length,
x * 2, char_offset, actual_x);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR)
LOG(("rufl_x_to_offset: rufl_FONT_MANAGER_ERROR: "
"0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess));
else
LOG(("rufl_x_to_offset: 0x%x", code));
/* warn_user("MiscError", "font error"); */
return false;
}
while (*char_offset && string[*char_offset] != ' ')
(*char_offset)--;
code = rufl_width(font_family, font_style, font_size,
string, *char_offset,
actual_x);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR)
LOG(("rufl_width: rufl_FONT_MANAGER_ERROR: 0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess));
else
LOG(("rufl_width: 0x%x", code));
/* warn_user("MiscError", "font error"); */
return false;
}
*actual_x /= 2;
return true;
}
/**
* Paint a string.
*
* \param style css_style for this text, with style->font_size.size ==
* CSS_FONT_SIZE_LENGTH
* \param string UTF-8 string to measure
* \param length length of string
* \param x x coordinate
* \param y y coordinate
* \param scale scale to apply to font size
* \param bg background colour
* \param c colour for text
* \return true on success, false on error and error reported
*/
bool nsfont_paint(struct css_style *style, const char *string,
size_t length, int x, int y, float scale)
{
const char *font_family;
unsigned int font_size;
rufl_style font_style;
rufl_code code;
nsfont_read_style(style, &font_family, &font_size, &font_style);
code = rufl_paint(font_family, font_style, font_size * scale,
string, length, x, y);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR)
LOG(("rufl_width: rufl_FONT_MANAGER_ERROR: 0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess));
else
LOG(("rufl_width: 0x%x", code));
}
return true;
}
/**
* Convert a css_style to a font family, size and rufl_style.
*
* \param style css_style for this text, with style->font_size.size ==
* CSS_FONT_SIZE_LENGTH
* \param font_family updated to font family
* \param font_size updated to font size
* \param font_style updated to font style
*/
void nsfont_read_style(const struct css_style *style,
const char **font_family, unsigned int *font_size,
rufl_style *font_style)
{
*font_family = "Homerton";
assert(style->font_size.size == CSS_FONT_SIZE_LENGTH);
*font_size = css_len2px(&style->font_size.value.length, style) *
72.0 / 90.0 * 16.;
if (*font_size < option_font_min_size * 1.6)
*font_size = option_font_min_size * 1.6;
if (1600 < *font_size)
*font_size = 1600;
switch (style->font_style) {
case CSS_FONT_STYLE_ITALIC:
case CSS_FONT_STYLE_OBLIQUE:
*font_style = rufl_SLANTED;
break;
default:
*font_style = rufl_REGULAR;
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:
*font_style += rufl_BOLD;
break;
default:
break;
}
}
void nsfont_txtenum(void *font, const char *text,
size_t length,
unsigned int *width,
const char **rofontname,
const char **rotext,
size_t *rolength,
size_t *consumed) { }
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