netsurf/amiga/font.c

442 lines
9.6 KiB
C

/*
* Copyright 2005 James Bursa <bursa@users.sourceforge.net>
* 2008 Chris Young <chris@unsatisfactorysoftware.co.uk>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include "css/css.h"
#include "render/font.h"
#include "amiga/gui.h"
#include <proto/graphics.h>
#include <proto/diskfont.h>
#include <graphics/rpattr.h>
#include "amiga/font.h"
#include "desktop/options.h"
#include "amiga/utf8.h"
#include "utils/utf8.h"
#include <diskfont/diskfonttag.h>
#include <diskfont/oterrors.h>
#include <proto/Picasso96API.h>
static bool nsfont_width(const struct css_style *style,
const char *string, size_t length,
int *width);
static 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);
static bool nsfont_split(const struct css_style *style,
const char *string, size_t length,
int x, size_t *char_offset, int *actual_x);
const struct font_functions nsfont = {
nsfont_width,
nsfont_position_in_string,
nsfont_split
};
bool nsfont_width(const struct css_style *style,
const char *string, size_t length,
int *width)
{
struct TextFont *tfont = ami_open_font(style);
/*
char *buffer;
utf8_to_local_encoding(string,length,&buffer);
if(buffer)
{
*/
*width = TextLength(currp,string,length); //buffer,strlen(buffer));
/*
}
else
{
*width=0;
}
*/
ami_close_font(tfont);
// ami_utf8_free(buffer);
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)
{
struct TextExtent extent;
struct TextFont *tfont = ami_open_font(style);
char *buffer;
utf8_to_local_encoding(string,length,&buffer);
if(buffer)
{
*char_offset = TextFit(currp,buffer,strlen(buffer),
&extent,NULL,1,x,32767);
*actual_x = extent.te_Extent.MaxX;
}
else
{
*char_offset = 0;
*actual_x = 0;
}
ami_close_font(tfont);
ami_utf8_free(buffer);
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)
{
struct TextExtent extent;
ULONG co;
char *charp;
struct TextFont *tfont = ami_open_font(style);
// char *buffer;
// utf8_to_local_encoding(string,length,&buffer);
co = TextFit(currp,string,length,
&extent,NULL,1,x,32767);
charp = string+co;
while(((*charp != ' ')) && (charp > string))
{
charp--;
co--;
}
*char_offset = co;
if(string && co)
{
*actual_x = TextLength(currp,string,co);
}
else
{
*actual_x = 0;
}
ami_close_font(tfont);
// ami_utf8_free(buffer);
return true;
}
struct TextFont *ami_open_font(struct css_style *style)
{
struct TextFont *tfont;
struct TTextAttr tattr;
struct TagItem tattrtags[2];
char fontname[256];
switch(style->font_family)
{
case CSS_FONT_FAMILY_SANS_SERIF:
strcpy(fontname,option_font_sans);
break;
case CSS_FONT_FAMILY_SERIF:
strcpy(fontname,option_font_serif);
break;
case CSS_FONT_FAMILY_MONOSPACE:
strcpy(fontname,option_font_mono);
break;
case CSS_FONT_FAMILY_CURSIVE:
strcpy(fontname,option_font_cursive);
break;
case CSS_FONT_FAMILY_FANTASY:
strcpy(fontname,option_font_fantasy);
break;
default:
strcpy(fontname,option_font_sans);
break;
}
switch(style->font_style)
{
case CSS_FONT_STYLE_ITALIC:
tattr.tta_Style = FSB_ITALIC;
break;
case CSS_FONT_STYLE_OBLIQUE:
tattr.tta_Style = FSB_BOLD;
break;
default:
tattr.tta_Style = FS_NORMAL;
break;
}
/* not supported
switch(style->font_variant)
{
default:
//printf("font variant: %ld\n",style->font_variant);
break;
}
*/
switch(style->font_size.size)
{
case CSS_FONT_SIZE_LENGTH:
tattr.tta_YSize = (UWORD)style->font_size.value.length.value;
break;
default:
printf("FONT SIZE TYPE: %ld\n",style->font_size.size);
break;
}
if(tattr.tta_YSize < option_font_min_size)
tattr.tta_YSize = option_font_min_size;
tattr.tta_Flags = 0;
/* Uncommenting this changes the font's charset.
106 is UTF-8 but OS4 doesn't support it so this only results in a crash!
tattrtags[0].ti_Tag = TA_CharSet;
tattrtags[0].ti_Data = 106;
tattrtags[1].ti_Tag = TAG_DONE;
tattr.tta_Flags = FSB_TAGGED;
tattr.tta_Tags = &tattrtags;
*/
strcat(fontname,".font");
tattr.tta_Name = fontname;
tfont = OpenDiskFont((struct TextAttr *)&tattr);
if(tfont)
{
SetRPAttrs(currp,
RPTAG_Font,tfont,
TAG_DONE);
}
// free(fontname);
return tfont;
}
struct OutlineFont *ami_open_outline_font(struct css_style *style)
{
struct OutlineFont *ofont;
char *fontname;
WORD ysize;
switch(style->font_family)
{
case CSS_FONT_FAMILY_SANS_SERIF:
fontname = option_font_sans;
break;
case CSS_FONT_FAMILY_SERIF:
fontname = option_font_serif;
break;
case CSS_FONT_FAMILY_MONOSPACE:
fontname = option_font_mono;
break;
case CSS_FONT_FAMILY_CURSIVE:
fontname = option_font_cursive;
break;
case CSS_FONT_FAMILY_FANTASY:
fontname = option_font_fantasy;
break;
default:
fontname = option_font_sans;
break;
}
if(!(ofont = OpenOutlineFont(fontname,NULL,OFF_OPEN))) return NULL;
/* not implemented yet
switch(style->font_style)
{
case CSS_FONT_STYLE_ITALIC:
tattr.tta_Style = FSB_ITALIC;
break;
case CSS_FONT_STYLE_OBLIQUE:
tattr.tta_Style = FSB_BOLD;
break;
default:
tattr.tta_Style = FS_NORMAL;
break;
}
*/
/* not supported
switch(style->font_variant)
{
default:
//printf("font variant: %ld\n",style->font_variant);
break;
}
*/
switch(style->font_size.size)
{
case CSS_FONT_SIZE_LENGTH:
ysize = style->font_size.value.length.value;
break;
default:
printf("FONT SIZE TYPE: %ld\n",style->font_size.size);
break;
}
if(ysize < option_font_min_size)
ysize = option_font_min_size;
if(ESetInfo(&ofont->olf_EEngine,
OT_DeviceDPI,(72<<16) | 72,
OT_PointHeight,(ysize<<16),
TAG_END) == OTERR_Success)
{
}
else
{
CloseOutlineFont(ofont,NULL);
return NULL;
}
return ofont;
}
void ami_close_outline_font(struct OutlineFont *ofont)
{
if(ofont) CloseOutlineFont(ofont,NULL);
}
void ami_close_font(struct TextFont *tfont)
{
SetRPAttrs(currp,
RPTAG_Font,origrpfont,
TAG_DONE);
if(tfont) CloseFont(tfont);
}
void ami_unicode_text(struct RastPort *rp,char *string,ULONG length,struct css_style *style,ULONG x, ULONG y, ULONG c)
{
WORD *utf16 = NULL;
struct OutlineFont *ofont;
struct GlyphMap *glyph;
ULONG i,gx,gy;
UBYTE *glyphbm;
UWORD posn;
if(!string || string[0]=='\0') return;
if(!length) return;
if(utf8_to_enc(string,"UTF-16",length,&utf16) != UTF8_CONVERT_OK) return;
if(!(ofont = ami_open_outline_font(style))) return;
for(i=0;i<length;i++)
{
if(ESetInfo(&ofont->olf_EEngine,
OT_GlyphCode,utf16[i],
TAG_END) == OTERR_Success)
{
if(EObtainInfo(&ofont->olf_EEngine,
OT_GlyphMap8Bit,&glyph,
TAG_END) == 0)
{
glyphbm = glyph->glm_BitMap;
if(!glyphbm) continue;
posn = 0; //(glyph->glm_BlackTop * glyph->glm_BMRows) + glyph->glm_BlackLeft;
//printf("%ld %ld\n",glyph->glm_BlackHeight,glyph->glm_BlackWidth);
x+= glyph->glm_BlackLeft;
for(gy=0;gy<glyph->glm_BlackHeight;gy++)
{
for(gx=0;gx<glyph->glm_BlackWidth;gx++)
{
/* This works... except it doesn't. Current public SDK doesn't have BltBitMapTags(),
which is needed along with BLITA_UseSrcAlpha, TRUE to respect the alpha channel.
We may even need to draw this text into a new bitmap and blit that onto our off-screen
rendering bitmap. */
p96WritePixel(rp,x+gx,(y-glyph->glm_BlackHeight)+gy,
p96EncodeColor(RGBFB_A8B8G8R8,(glyphbm[posn+gx] << 24) | c));
}
posn+=glyph->glm_BMModulo;
}
x+= glyph->glm_BlackWidth;
//x+=(glyph->glm_Width >> 16);
// printf("%ld: %ld\n",i,(glyph->glm_Width >> 16));
EReleaseInfo(&ofont->olf_EEngine,
OT_GlyphMap8Bit,glyph,
TAG_END);
}
}
}
ami_close_outline_font(ofont);
}