mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-28 01:09:39 +03:00
[project @ 2004-01-21 23:57:19 by bursa]
Clean up and comment. svn path=/import/netsurf/; revision=493
This commit is contained in:
James Bursa
parent
6b367e0795
commit
eecd008a16
233
riscos/font.c
233
riscos/font.c
@ -6,6 +6,12 @@
|
||||
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.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"
|
||||
@ -25,8 +31,10 @@ struct font_set {
|
||||
struct font_data *font[FONT_FAMILIES * 4];
|
||||
};
|
||||
|
||||
/**
|
||||
/** Table of font names.
|
||||
*
|
||||
* font id = font family * 4 + bold * 2 + slanted
|
||||
*
|
||||
* font family: 0 = sans-serif, 1 = serif, ...
|
||||
*/
|
||||
|
||||
@ -38,63 +46,13 @@ const char * const font_table[FONT_FAMILIES * 4] = {
|
||||
"Homerton.Bold.Oblique\\ELatin1",
|
||||
};
|
||||
|
||||
static void font_close(struct font_data *data);
|
||||
|
||||
/**
|
||||
* functions
|
||||
* Create an empty font_set.
|
||||
*
|
||||
* \return an opaque struct font_set.
|
||||
*/
|
||||
|
||||
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_f)(font->handle), text,
|
||||
font_GIVEN_FONT | font_KERN | font_GIVEN_LENGTH,
|
||||
0x7fffffff, 0x7fffffff,
|
||||
0,
|
||||
0, (int)length,
|
||||
0, &width, 0, 0);
|
||||
if (error != 0) {
|
||||
fprintf(stderr, "%s\n", error->errmess);
|
||||
die("font_width: 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_f)(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, (int)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));
|
||||
@ -107,13 +65,26 @@ struct font_set *font_new_set()
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Open a font for use based on a css_style.
|
||||
*
|
||||
* \param set a font_set, as returned by font_new_set()
|
||||
* \param style a css_style which describes the font
|
||||
* \return a struct font_data, with a RISC OS font handle in handle
|
||||
*
|
||||
* The set is updated to include the font, if it was not present.
|
||||
*/
|
||||
|
||||
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;
|
||||
font_f handle;
|
||||
os_error *error;
|
||||
|
||||
assert(set != 0);
|
||||
assert(set);
|
||||
assert(style);
|
||||
|
||||
if (style->font_size.size == CSS_FONT_SIZE_LENGTH)
|
||||
size = style->font_size.value.length.value * 16;
|
||||
@ -145,19 +116,14 @@ struct font_data *font_open(struct font_set *set, struct css_style *style)
|
||||
|
||||
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], (int)size, (int)size,
|
||||
0, 0, &handle, 0, 0);
|
||||
if (error != 0) {
|
||||
fprintf(stderr, "%s\n", error->errmess);
|
||||
die("font_find_font failed");
|
||||
}
|
||||
data->handle = handle;
|
||||
error = xfont_find_font(font_table[f], (int)size, (int)size,
|
||||
0, 0, &handle, 0, 0);
|
||||
if (error) {
|
||||
fprintf(stderr, "%i: %s\n", error->errnum, error->errmess);
|
||||
die("font_find_font failed");
|
||||
}
|
||||
|
||||
data->handle = handle;
|
||||
data->size = size;
|
||||
data->space_width = font_width(data, " ", 1);
|
||||
|
||||
@ -168,6 +134,12 @@ struct font_data *font_open(struct font_set *set, struct css_style *style)
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Frees all the fonts in a font_set.
|
||||
*
|
||||
* \param set a font_set as returned by font_new_set()
|
||||
*/
|
||||
|
||||
void font_free_set(struct font_set *set)
|
||||
{
|
||||
unsigned int i;
|
||||
@ -178,7 +150,8 @@ void font_free_set(struct font_set *set)
|
||||
for (i = 0; i < FONT_FAMILIES * 4; i++) {
|
||||
for (data = set->font[i]; data != 0; data = next) {
|
||||
next = data->next;
|
||||
font_close(data);
|
||||
font_lose_font((font_f)(data->handle));
|
||||
free(data);
|
||||
}
|
||||
}
|
||||
|
||||
@ -186,14 +159,99 @@ void font_free_set(struct font_set *set)
|
||||
}
|
||||
|
||||
|
||||
void font_close(struct font_data *data)
|
||||
{
|
||||
font_lose_font((font_f)(data->handle));
|
||||
/**
|
||||
* Find the width of some text in a font.
|
||||
*
|
||||
* \param font a font_data, as returned by font_open()
|
||||
* \param text string to measure
|
||||
* \param length length of text
|
||||
* \return width of text in pixels
|
||||
*/
|
||||
|
||||
free(data);
|
||||
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_f)(font->handle), text,
|
||||
font_GIVEN_FONT | font_KERN | font_GIVEN_LENGTH,
|
||||
0x7fffffff, 0x7fffffff,
|
||||
0,
|
||||
0, (int)length,
|
||||
0, &width, 0, 0);
|
||||
if (error != 0) {
|
||||
fprintf(stderr, "%s\n", error->errmess);
|
||||
die("font_width: 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 text a string
|
||||
* \param font a font_data, as returned by font_open()
|
||||
* \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 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;
|
||||
os_error *error;
|
||||
|
||||
assert(font != 0 && text != 0);
|
||||
|
||||
block.space.x = block.space.y = 0;
|
||||
block.letter.x = block.letter.y = 0;
|
||||
block.split_char = -1;
|
||||
|
||||
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, 0, (int)length,
|
||||
&split_point, &x_out, &y_out, &length_out);
|
||||
if (error) {
|
||||
fprintf(stderr, "%s\n", error->errmess);
|
||||
die("font_width: font_scan_string failed");
|
||||
}
|
||||
|
||||
*char_offset = (int)(split_point - text);
|
||||
*pixel_offset = x_out / 2 / 400;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Find where to split a string to fit in a width.
|
||||
*
|
||||
* For example, used when wrapping paragraphs.
|
||||
*
|
||||
* \param data a font_data, as returned by font_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 * font_split(struct font_data *data, const char * text, unsigned int length,
|
||||
unsigned int width, unsigned int *used_width)
|
||||
{
|
||||
@ -206,7 +264,7 @@ char * font_split(struct font_data *data, const char * text, unsigned int length
|
||||
|
||||
error = xfont_scan_string((font_f)(data->handle), text,
|
||||
font_GIVEN_BLOCK | font_GIVEN_FONT | font_KERN | font_GIVEN_LENGTH,
|
||||
ro_x_units(width) * 400, 0x7fffffff,
|
||||
width * 2 * 400, 0x7fffffff,
|
||||
&block,
|
||||
0,
|
||||
(int)length,
|
||||
@ -217,8 +275,35 @@ char * font_split(struct font_data *data, const char * text, unsigned int length
|
||||
die("font_split: font_scan_string failed");
|
||||
}
|
||||
|
||||
*used_width = browser_x_units((int)(*used_width / 400));
|
||||
*used_width = *used_width / 2 / 400;
|
||||
|
||||
return split;
|
||||
}
|
||||
|
||||
|
||||
#ifdef TEST
|
||||
|
||||
int main(void)
|
||||
{
|
||||
unsigned int i;
|
||||
struct font_set *set;
|
||||
struct css_style style;
|
||||
|
||||
style.font_size.size = CSS_FONT_SIZE_LENGTH;
|
||||
style.font_weight = CSS_FONT_WEIGHT_BOLD;
|
||||
style.font_style = CSS_FONT_STYLE_ITALIC;
|
||||
|
||||
set = font_new_set();
|
||||
|
||||
for (i = 10; i != 100; i += 10) {
|
||||
style.font_size.value.length.value = i;
|
||||
font_open(set, &style);
|
||||
}
|
||||
|
||||
font_free_set(set);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user