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WebSurf/frontends/atari/plot/font_freetype.c

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/*
* Copyright 2005 James Bursa <bursa@users.sourceforge.net>
* 2008 Vincent Sanders <vince@simtec.co.uk>
* 2011 Ole Loots <ole@monochrom.net>
* 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/>.
*/
#ifdef WITH_FREETYPE_FONT_DRIVER
#include <assert.h>
#include <ft2build.h>
#include FT_CACHE_H
#include "utils/log.h"
#include "utils/nsoption.h"
#include "netsurf/mouse.h"
#include "netsurf/plot_style.h"
#include "atari/gui.h"
#include "atari/bitmap.h"
#include "atari/plot/plot.h"
#include "atari/plot/fontplot.h"
#include "atari/plot/font_freetype.h"
#include "atari/findfile.h"
#include "atari/gemtk/gemtk.h"
/* -------------------------------------------------------------------------- */
/* Font Loading & Mapping scheme */
/* -------------------------------------------------------------------------- */
/*
Truetype fonts are loaded in the following priority order:
1. Option values.
2. default resouce names (8.3 compatible).
3. default font package installation path.
Resource font names & their meanings:
--------------------------------------------
s.ttf => Serif
sb.ttf => Serif Bold
ss.ttf => Sans Serif *Default Font
ssb.ttf => Sans Serif Bold
ssi.ttf => Sans Serif Italic
ssib.ttf => Sans Serif Italic Bold
mono.ttf => Monospaced
monob.ttf => Monospaced Bold
cursive.ttf => Cursive
fantasy.ttf => Fantasy
*/
#define FONT_RESOURCE_PATH "fonts/"
#define DEJAVU_PATH "/usr/share/fonts/truetype/ttf-dejavu/"
#define BITSTREAM_PATH "/usr/share/fonts/truetype/ttf-bitstream-vera/"
#if !defined(USE_BITSTREAM_FONT_PACKAGE) && !defined(USE_DEJAVU_FONT_PACKAGE)
# define USE_BITSTREAM_FONT_PACKAGE
#endif
#if defined(USE_DEJAVU_FONT_PACKAGE)
# define FONT_PKG_PATH DEJAVU_PATH
# define FONT_FILE_SANS "DejaVuSans.ttf"
# define FONT_FILE_SANS_BOLD "DejaVuSans-Bold.ttf"
# define FONT_FILE_SANS_OBLIQUE "DejaVuSans-Oblique.ttf"
# define FONT_FILE_SANS_BOLD_OBLIQUE "DejaVuSans-BoldOblique.ttf"
# define FONT_FILE_SERIF "DejaVuSerif.ttf"
# define FONT_FILE_SERIF_BOLD "DejaVuSerif-Bold.ttf"
# define FONT_FILE_MONO "DejaVuSansMono.ttf"
# define FONT_FILE_MONO_BOLD "DejaVuSerif-Bold.ttf"
# define FONT_FILE_OBLIQUE "DejaVuSansMono-Oblique.ttf"
# define FONT_FILE_FANTASY "DejaVuSerifCondensed-Bold.ttf"
#elif defined(USE_BITSTREAM_FONT_PACKAGE)
# define FONT_PKG_PATH BITSTREAM_PATH
# define FONT_FILE_SANS "Vera.ttf"
# define FONT_FILE_SANS_BOLD "VeraBd.ttf"
# define FONT_FILE_SANS_OBLIQUE "VeraIt.ttf"
# define FONT_FILE_SANS_BOLD_OBLIQUE "VeraBI.ttf"
# define FONT_FILE_SERIF "VeraSe.ttf"
# define FONT_FILE_SERIF_BOLD "VeraSeBd.ttf"
# define FONT_FILE_MONO "VeraMono.ttf"
# define FONT_FILE_MONO_BOLD "VeraMoBd.ttf"
# define FONT_FILE_OBLIQUE "VeraMoIt.ttf"
# define FONT_FILE_FANTASY "VeraMoBI.ttf"
#endif
#define CACHE_SIZE 2048
#define CACHE_MIN_SIZE (100 * 1024)
#define BOLD_WEIGHT 700
extern unsigned long atari_plot_flags;
extern int atari_plot_vdi_handle;
static FT_Library library;
static FTC_Manager ft_cmanager;
static FTC_CMapCache ft_cmap_cache ;
static FTC_ImageCache ft_image_cache;
int ft_load_type;
/* cache manager faceID data to create freetype faceid on demand */
typedef struct ftc_faceid_s {
char *fontfile; /* path to font */
int index; /* index of font */
int cidx; /* character map index for unicode */
} ftc_faceid_t;
static int dtor( FONT_PLOTTER self );
static int str_width( FONT_PLOTTER self,const plot_font_style_t *fstyle,
const char * str, size_t length, int * width );
static int str_split( FONT_PLOTTER self, const plot_font_style_t *fstyle,
const char *string, size_t length,int x,
size_t *char_offset, int *actual_x );
static int pixel_pos( FONT_PLOTTER self, const plot_font_style_t *fstyle,
const char *string, size_t length,int x,
size_t *char_offset, int *actual_x );
static int text( FONT_PLOTTER self, int x, int y, const char *text,
size_t length, const plot_font_style_t *fstyle );
static void draw_glyph8(FONT_PLOTTER self, GRECT *clip, GRECT * loc,
uint8_t * pixdata, int pitch, uint32_t colour);
static void draw_glyph1(FONT_PLOTTER self, GRECT * clip, GRECT * loc,
uint8_t * pixdata, int pitch, uint32_t colour);
static ftc_faceid_t *font_faces[FONT_FACE_COUNT];
static MFDB tmp;
static int tmp_mfdb_size;
static bool init = false;
static struct bitmap * fontbmp;
static size_t fontbmp_stride;
static int fontbmp_allocated_height;
static int fontbmp_allocated_width;
/* map cache manager handle to face id */
static FT_Error ft_face_requester(FTC_FaceID face_id, FT_Library library, FT_Pointer request_data, FT_Face *face )
{
FT_Error error;
ftc_faceid_t *ft_face = (ftc_faceid_t *)face_id;
int cidx;
error = FT_New_Face(library, ft_face->fontfile, ft_face->index, face);
if (error) {
NSLOG(netsurf, INFO, "Could not find font (code %d)\n", error);
} else {
error = FT_Select_Charmap(*face, FT_ENCODING_UNICODE);
if (error) {
NSLOG(netsurf, INFO,
"Could not select charmap (code %d)\n", error);
} else {
for (cidx = 0; cidx < (*face)->num_charmaps; cidx++) {
if ((*face)->charmap == (*face)->charmaps[cidx]) {
ft_face->cidx = cidx;
break;
}
}
}
}
NSLOG(netsurf, INFO, "Loaded face from %s\n", ft_face->fontfile);
return error;
}
/* create new framebuffer face and cause it to be loaded to check its ok */
static ftc_faceid_t *
ft_new_face(const char *option, const char *resname, const char *fontfile)
{
ftc_faceid_t *newf;
FT_Error error;
FT_Face aface;
char buf[PATH_MAX];
newf = calloc(1, sizeof(ftc_faceid_t));
if (option != NULL) {
newf->fontfile = strdup(option);
} else {
atari_find_resource(buf, resname, fontfile);
newf->fontfile = strdup(buf);
}
error = FTC_Manager_LookupFace(ft_cmanager, (FTC_FaceID)newf, &aface);
if (error) {
NSLOG(netsurf, INFO,
"Could not find font face %s (code %d)\n", fontfile,
error);
free(newf);
newf = font_faces[FONT_FACE_DEFAULT]; /* use default */
}
return newf;
}
static void ft_fill_scalar(const plot_font_style_t *fstyle, FTC_Scaler srec)
{
int selected_face = FONT_FACE_DEFAULT;
switch (fstyle->family) {
case PLOT_FONT_FAMILY_SERIF:
if (fstyle->weight >= BOLD_WEIGHT) {
selected_face = FONT_FACE_SERIF_BOLD;
} else {
selected_face = FONT_FACE_SERIF;
}
break;
case PLOT_FONT_FAMILY_MONOSPACE:
if (fstyle->weight >= BOLD_WEIGHT) {
selected_face = FONT_FACE_MONOSPACE_BOLD;
} else {
selected_face = FONT_FACE_MONOSPACE;
}
break;
case PLOT_FONT_FAMILY_CURSIVE:
selected_face = FONT_FACE_CURSIVE;
break;
case PLOT_FONT_FAMILY_FANTASY:
selected_face = FONT_FACE_FANTASY;
break;
case PLOT_FONT_FAMILY_SANS_SERIF:
default:
if ((fstyle->flags & FONTF_ITALIC) ||
(fstyle->flags & FONTF_OBLIQUE)) {
if (fstyle->weight >= BOLD_WEIGHT) {
selected_face = FONT_FACE_SANS_SERIF_ITALIC_BOLD;
} else {
selected_face = FONT_FACE_SANS_SERIF_ITALIC;
}
} else {
if (fstyle->weight >= BOLD_WEIGHT) {
selected_face = FONT_FACE_SANS_SERIF_BOLD;
} else {
selected_face = FONT_FACE_SANS_SERIF;
}
}
}
srec->face_id = (FTC_FaceID)font_faces[selected_face];
srec->width = srec->height = (fstyle->size * 64) / PLOT_STYLE_SCALE;
srec->pixel = 0;
/* calculate x/y resolution, when browser_get_dpi() isn't available */
/* 72 is an good value. */
/* TODO: because browser_get_dpi() is to large, calculate that value */
/* by VDI values. */
srec->x_res = srec->y_res = 72; // browser_get_dpi();
}
static FT_Glyph ft_getglyph(const plot_font_style_t *fstyle, uint32_t ucs4)
{
FT_UInt glyph_index;
FTC_ScalerRec srec;
FT_Glyph glyph;
//FT_Error error;
ftc_faceid_t *ft_face;
ft_fill_scalar(fstyle, &srec);
ft_face = (ftc_faceid_t *)srec.face_id;
glyph_index = FTC_CMapCache_Lookup(ft_cmap_cache, srec.face_id, ft_face->cidx, ucs4);
//error =
FTC_ImageCache_LookupScaler(ft_image_cache,
&srec,
FT_LOAD_RENDER |
FT_LOAD_FORCE_AUTOHINT |
ft_load_type,
glyph_index,
&glyph,
NULL);
return glyph;
}
/* initialise font handling */
static bool ft_font_init(void)
{
FT_Error error;
FT_ULong max_cache_size;
FT_UInt max_faces = 6;
int i;
/* freetype library initialise */
error = FT_Init_FreeType( &library );
if (error) {
NSLOG(netsurf, INFO,
"Freetype could not initialised (code %d)\n", error);
return false;
}
/* set the Glyph cache size up */
max_cache_size = CACHE_SIZE * 1024;
if (max_cache_size < CACHE_MIN_SIZE) {
max_cache_size = CACHE_MIN_SIZE;
}
/* cache manager initialise */
error = FTC_Manager_New(library,
max_faces,
0,
max_cache_size,
ft_face_requester,
NULL,
&ft_cmanager);
if (error) {
NSLOG(netsurf, INFO,
"Freetype could not initialise cache manager (code %d)\n",
error);
FT_Done_FreeType(library);
return false;
}
error = FTC_CMapCache_New(ft_cmanager, &ft_cmap_cache);
error = FTC_ImageCache_New(ft_cmanager, &ft_image_cache);
/* Optain font faces */
/* Default font, Sans Serif */
font_faces[FONT_FACE_SANS_SERIF] = NULL;
font_faces[FONT_FACE_SANS_SERIF] = ft_new_face(
nsoption_charp(font_face_sans_serif),
FONT_RESOURCE_PATH "ss.ttf",
FONT_PKG_PATH FONT_FILE_SANS
);
if (font_faces[FONT_FACE_SANS_SERIF] == NULL) {
NSLOG(netsurf, INFO,
"Could not find default font (code %d)\n", error);
FTC_Manager_Done(ft_cmanager);
FT_Done_FreeType(library);
return false;
}
/* Sans Serif Bold*/
font_faces[FONT_FACE_SANS_SERIF_BOLD] =
ft_new_face(nsoption_charp(font_face_sans_serif_bold),
FONT_RESOURCE_PATH "ssb.ttf",
FONT_PKG_PATH FONT_FILE_SANS_BOLD);
/* Sans Serif Italic */
font_faces[FONT_FACE_SANS_SERIF_ITALIC] =
ft_new_face(nsoption_charp(font_face_sans_serif_italic),
FONT_RESOURCE_PATH "ssi.ttf",
FONT_PKG_PATH FONT_FILE_SANS_OBLIQUE);
/* Sans Serif Italic Bold */
font_faces[FONT_FACE_SANS_SERIF_ITALIC_BOLD] =
ft_new_face(nsoption_charp(font_face_sans_serif_italic_bold),
FONT_RESOURCE_PATH "ssib.ttf",
FONT_PKG_PATH FONT_FILE_SANS_BOLD_OBLIQUE);
/* Monospaced */
font_faces[FONT_FACE_MONOSPACE] =
ft_new_face(nsoption_charp(font_face_monospace),
FONT_RESOURCE_PATH "mono.ttf",
FONT_PKG_PATH FONT_FILE_MONO);
/* Mospaced Bold */
font_faces[FONT_FACE_MONOSPACE_BOLD] =
ft_new_face(nsoption_charp(font_face_monospace_bold),
FONT_RESOURCE_PATH "monob.ttf",
FONT_PKG_PATH FONT_FILE_MONO_BOLD);
/* Serif */
font_faces[FONT_FACE_SERIF] =
ft_new_face(nsoption_charp(font_face_serif),
FONT_RESOURCE_PATH "s.ttf",
FONT_PKG_PATH FONT_FILE_SERIF);
/* Serif Bold */
font_faces[FONT_FACE_SERIF_BOLD] =
ft_new_face(nsoption_charp(font_face_serif_bold),
FONT_RESOURCE_PATH "sb.ttf",
FONT_PKG_PATH FONT_FILE_SERIF_BOLD);
/* Cursive */
font_faces[FONT_FACE_CURSIVE] =
ft_new_face(nsoption_charp(font_face_cursive),
FONT_RESOURCE_PATH "cursive.ttf",
FONT_PKG_PATH FONT_FILE_OBLIQUE);
/* Fantasy */
font_faces[FONT_FACE_FANTASY] =
ft_new_face(nsoption_charp(font_face_fantasy),
FONT_RESOURCE_PATH "fantasy.ttf",
FONT_PKG_PATH FONT_FILE_FANTASY);
for (i=1; i<FONT_FACE_COUNT; i++) {
if (font_faces[i] == NULL){
font_faces[i] = font_faces[FONT_FACE_SANS_SERIF];
}
}
return true;
}
static bool ft_font_finalise(void)
{
FTC_Manager_Done(ft_cmanager );
FT_Done_FreeType(library);
return true;
}
static int str_width( FONT_PLOTTER self,const plot_font_style_t *fstyle,
const char *string, size_t length,
int *width)
{
uint32_t ucs4;
size_t nxtchr = 0;
FT_Glyph glyph;
*width = 0;
while (nxtchr < length) {
ucs4 = utf8_to_ucs4(string + nxtchr, length - nxtchr);
nxtchr = utf8_next(string, length, nxtchr);
glyph = ft_getglyph(fstyle, ucs4);
if (glyph == NULL)
continue;
*width += glyph->advance.x >> 16;
}
return(1);
}
static int str_split( FONT_PLOTTER self, const plot_font_style_t *fstyle,
const char *string, size_t length,
int x, size_t *char_offset, int *actual_x)
{
uint32_t ucs4;
size_t nxtchr = 0;
int last_space_x = 0;
int last_space_idx = 0;
FT_Glyph glyph;
*actual_x = 0;
while (nxtchr < length) {
ucs4 = utf8_to_ucs4(string + nxtchr, length - nxtchr);
glyph = ft_getglyph(fstyle, ucs4);
if (glyph == NULL)
continue;
if (ucs4 == 0x20) {
last_space_x = *actual_x;
last_space_idx = nxtchr;
}
*actual_x += glyph->advance.x >> 16;
if (*actual_x > x && last_space_idx != 0) {
/* string has exceeded available width and we've
* found a space; return previous space */
*actual_x = last_space_x;
*char_offset = last_space_idx;
return true;
}
nxtchr = utf8_next(string, length, nxtchr);
}
*char_offset = nxtchr;
return (1);
}
static int pixel_pos( FONT_PLOTTER self, const plot_font_style_t *fstyle,
const char *string, size_t length,
int x, size_t *char_offset, int *actual_x)
{
uint32_t ucs4;
size_t nxtchr = 0;
FT_Glyph glyph;
int prev_x = 0;
*actual_x = 0;
while (nxtchr < length) {
ucs4 = utf8_to_ucs4(string + nxtchr, length - nxtchr);
glyph = ft_getglyph(fstyle, ucs4);
if (glyph == NULL)
continue;
*actual_x += glyph->advance.x >> 16;
if (*actual_x > x)
break;
prev_x = *actual_x;
nxtchr = utf8_next(string, length, nxtchr);
}
/* choose nearest of previous and last x */
if (abs(*actual_x - x) > abs(prev_x - x))
*actual_x = prev_x;
*char_offset = nxtchr;
return ( 1 );
}
static void draw_glyph8(FONT_PLOTTER self, GRECT * clip, GRECT * loc, uint8_t * pixdata, int pitch, uint32_t colour)
{
uint32_t * linebuf;
uint32_t fontpix;
int xloop,yloop,xoff,yoff;
int x,y,w,h;
x = loc->g_x;
y = loc->g_y;
w = loc->g_w;
h = loc->g_h;
if( !rc_intersect( clip, loc ) ){
return;
}
xoff = loc->g_x - x;
yoff = loc->g_y - y;
assert( loc->g_h <= h );
assert( loc->g_w <= w );
h = loc->g_h;
w = loc->g_w;
assert( h <= fontbmp_allocated_height );
assert( w <= fontbmp_allocated_width );
fontbmp->height = h;
fontbmp->width = w;
for( yloop = 0; yloop < MIN(fontbmp_allocated_height, h); yloop++) {
linebuf = (uint32_t *)(fontbmp->pixdata + (fontbmp_stride * yloop));
for(xloop = 0; xloop < MIN(fontbmp_allocated_width, w); xloop++){
fontpix = (uint32_t)(pixdata[(( yoff + yloop ) * pitch) + xloop + xoff]);
linebuf[xloop] = (uint32_t)(colour | fontpix);
}
}
plot_blit_bitmap(fontbmp, loc->g_x, loc->g_y, 0, BITMAPF_MONOGLYPH);
}
static void draw_glyph1(FONT_PLOTTER self, GRECT * clip, GRECT * loc, uint8_t * pixdata, int pitch, uint32_t colour)
{
int xloop,yloop,xoff,yoff;
int x,y,w,h;
uint8_t bitm;
const uint8_t *fntd;
x = loc->g_x;
y = loc->g_y;
w = loc->g_w;
h = loc->g_h;
if( !rc_intersect( clip, loc ) ){
return;
}
xoff = loc->g_x - x;
yoff = loc->g_y - y;
if (h > loc->g_h)
h = loc->g_h;
if (w > loc->g_w)
w = loc->g_w;
int stride = MFDB_STRIDE( w );
if( tmp.fd_addr == NULL || tmp_mfdb_size < MFDB_SIZE( 1, stride, h) ){
tmp_mfdb_size = init_mfdb( 1, w, h, MFDB_FLAG_STAND | MFDB_FLAG_ZEROMEM, &tmp );
} else {
void * buf = tmp.fd_addr;
int size = init_mfdb( 1, w, h, MFDB_FLAG_STAND | MFDB_FLAG_NOALLOC, &tmp );
tmp.fd_addr = buf;
memset( tmp.fd_addr, 0, size );
}
short * buf;
for( yloop = 0; yloop < h; yloop++) {
fntd = pixdata + (pitch * (yloop+yoff))+(xoff>>3);
buf = tmp.fd_addr;
buf += (tmp.fd_wdwidth*yloop);
for ( xloop = 0, bitm = (1<<(7-(xoff%8))); xloop < w; xloop++, bitm=(bitm>>1) ) {
if( (*fntd & bitm) != 0 ){
short whichbit = (1<<(15-(xloop%16)));
buf[xloop>>4] = ((buf[xloop>>4])|(whichbit));
}
if( bitm == 1 ) {
fntd++;
bitm = 128;
}
}
}
#ifdef WITH_8BPP_SUPPORT
if( app.nplanes > 8 ){
#endif
plot_blit_mfdb(loc, &tmp, OFFSET_CUSTOM_COLOR, PLOT_FLAG_TRANS );
#ifdef WITH_8BPP_SUPPORT
} else {
plot_blit_mfdb(loc, &tmp, colour, PLOT_FLAG_TRANS );
}
#endif
}
static int text( FONT_PLOTTER self, int x, int y, const char *text, size_t length,
const plot_font_style_t *fstyle )
{
uint32_t ucs4;
size_t nxtchr = 0;
FT_Glyph glyph;
FT_BitmapGlyph bglyph;
GRECT loc, clip;
uint32_t c = fstyle->foreground ;
struct rect clipping;
/* in -> BGR */
/* out -> ARGB */
if( !(self->flags & FONTPLOT_FLAG_MONOGLYPH) ){
c = ABGR_TO_RGB(c);
} else {
#ifdef WITH_8BPP_SUPPORT
if( app.nplanes > 8 ){
#endif
RGB1000 out; /* struct with RGB shorts */
rgb_to_vdi1000( (unsigned char*)&c, &out);
vs_color(atari_plot_vdi_handle, OFFSET_CUSTOM_COLOR,
(short*)&out);
#ifdef WITH_8BPP_SUPPORT
} else {
c = RGB_TO_VDI(c);
}
#endif
}
plot_get_clip(&clipping);
clip.g_x = clipping.x0;
clip.g_y = clipping.y0;
clip.g_w = (clipping.x1 - clipping.x0)+1;
clip.g_h = (clipping.y1 - clipping.y0)+1;
fontbmp = atari_bitmap_realloc( clip.g_w, clip.g_h,
4, clip.g_w << 2,
BITMAP_GROW, fontbmp );
fontbmp_stride = atari_bitmap_get_rowstride(fontbmp);
fontbmp_allocated_height = clip.g_h;
fontbmp_allocated_width = clip.g_w;
while (nxtchr < length) {
ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr);
nxtchr = utf8_next(text, length, nxtchr);
glyph = ft_getglyph(fstyle, ucs4);
if (glyph == NULL){
continue;
}
if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
bglyph = (FT_BitmapGlyph)glyph;
loc.g_x = x + bglyph->left;
loc.g_y = y - bglyph->top;
loc.g_w = bglyph->bitmap.width;
loc.g_h = bglyph->bitmap.rows;
if( loc.g_w > 0) {
self->draw_glyph( self,
&clip, &loc,
bglyph->bitmap.buffer,
bglyph->bitmap.pitch,
c
);
}
}
x += glyph->advance.x >> 16;
}
return( 0 );
}
int ctor_font_plotter_freetype( FONT_PLOTTER self )
{
self->dtor = dtor;
self->str_width = str_width;
self->str_split = str_split;
self->pixel_pos = pixel_pos;
self->text = text;
/* set the default render mode */
if( (self->flags & FONTPLOT_FLAG_MONOGLYPH) != 0 ){
ft_load_type = FT_LOAD_MONOCHROME;
self->draw_glyph = draw_glyph1;
}
else{
ft_load_type = 0;
self->draw_glyph = draw_glyph8;
}
NSLOG(netsurf, INFO, "%s: %s\n", (char *)__FILE__, __FUNCTION__);
if( !init ) {
ft_font_init();
fontbmp = atari_bitmap_create(48, 48, 0);
fontbmp->opaque = false;
init = true;
}
return( 1 );
}
static int dtor( FONT_PLOTTER self )
{
ft_font_finalise();
if( fontbmp != NULL ) {
atari_bitmap_destroy( fontbmp );
fontbmp = NULL;
}
if( tmp.fd_addr != NULL ){
free( tmp.fd_addr );
}
return( 1 );
}
#endif
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