gtk/gdk/linux-fb/gdkpango-fb.c
Alexander Larsson be698675c7 Cleanup and reindent of GtkFB.
Added some serial mouse support.
Updates to latest Gtk+/pango
2000-11-13 17:40:23 +00:00

777 lines
20 KiB
C

#include <glib.h>
#include "gdkprivate-fb.h"
#include "gdkpango.h"
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <pango/pango.h>
#include <pango/pango-modules.h>
#include <freetype/freetype.h>
#include <freetype/ftglyph.h>
#include <freetype/ftgrays.h>
#if !defined(FREETYPE_MAJOR) || FREETYPE_MAJOR != 2
#error "We need Freetype 2.0 (beta?)"
#endif
#define PANGO_RENDER_TYPE_FB "PangoRenderTypeFB"
typedef struct {
PangoFontMap parent_instance;
GPtrArray *all_descs;
GHashTable *all_fonts;
int n_fonts;
double resolution;
} PangoFBFontMap;
typedef struct {
PangoFontMapClass parent_class;
} PangoFBFontMapClass;
typedef struct {
PangoFontDescription desc;
FT_Face ftf;
} PangoFBFontListing;
FT_Library gdk_fb_ft_lib = NULL;
#define USE_FTGRAYS
void
gdk_fb_font_init (void)
{
FT_Init_FreeType (&gdk_fb_ft_lib);
#ifdef USE_FTGRAYS
FT_Set_Raster (gdk_fb_ft_lib, &ft_grays_raster); /* If this is removed, also turn off USE_FTGRAYS define in gdkdrawable-fb2.c */
#endif
}
void
gdk_fb_font_fini (void)
{
FT_Done_FreeType (gdk_fb_ft_lib);
}
void pango_fb_font_set_size (PangoFont *font);
static void pango_fb_font_map_init (PangoFBFontMap *fontmap);
static PangoFont *pango_fb_font_map_load_font (PangoFontMap *fontmap,
const PangoFontDescription *desc);
static void pango_fb_font_map_list_fonts (PangoFontMap *fontmap,
const gchar *family,
PangoFontDescription ***descs,
int *n_descs);
static void pango_fb_font_map_list_families (PangoFontMap *fontmap,
gchar ***families,
int *n_families);
static void
pango_fb_font_map_class_init (PangoFBFontMapClass *class)
{
class->parent_class.load_font = pango_fb_font_map_load_font;
class->parent_class.list_fonts = pango_fb_font_map_list_fonts;
class->parent_class.list_families = pango_fb_font_map_list_families;
}
GType
pango_fb_font_map_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
static const GTypeInfo object_info =
{
sizeof (PangoFBFontMapClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) pango_fb_font_map_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (PangoFBFontMap),
0, /* n_preallocs */
(GInstanceInitFunc) pango_fb_font_map_init,
};
object_type = g_type_register_static (PANGO_TYPE_FONT_MAP,
"PangoFBFontMap",
&object_info,
0);
}
return object_type;
}
static PangoFont *
pango_fb_font_map_load_font (PangoFontMap *fontmap,
const PangoFontDescription *desc)
{
PangoFBFontMap *fbfm = (PangoFBFontMap *)fontmap;
PangoFBFont *retval;
PangoFBFontListing *fl = NULL;
int i;
PangoFontDescription d2;
/* XXX fixme badhack */
if (!strcasecmp (desc->family_name, "sans"))
{
d2 = *desc;
d2.family_name = "Arial";
desc = &d2;
}
/* XXX fixme badhack */
if (!strcasecmp (desc->family_name, "serif"))
{
d2 = *desc;
d2.family_name = "Times New Roman";
desc = &d2;
}
retval = g_hash_table_lookup (fbfm->all_fonts, desc);
if (retval)
{
g_object_ref (G_OBJECT(retval));
goto out;
}
for (i = 0; i < fbfm->all_descs->len; i++)
{
fl = g_ptr_array_index (fbfm->all_descs, i);
/* Can't use pango_font_description_equal() because it checks ->size as well */
if (!g_strcasecmp (desc->family_name, fl->desc.family_name) &&
desc->style == fl->desc.style &&
desc->weight == fl->desc.weight &&
desc->stretch == fl->desc.stretch)
break;
}
if (i >= fbfm->all_descs->len)
return NULL;
retval = (PangoFBFont *)g_object_new (PANGO_TYPE_FB_FONT, NULL);
retval->desc = *desc;
retval->desc.family_name = g_strdup (desc->family_name);
retval->ftf = fl->ftf;
g_hash_table_insert (fbfm->all_fonts, &retval->desc, retval);
g_object_ref (G_OBJECT (retval)); /* XXX FIXME: We have to keep the font in the cache forever because I'm too clueless to see
signals in gobject */
out:
return (PangoFont *)retval;
}
static void
list_fonts (PangoFBFontMap *fm,
const char *family,
GPtrArray *descs,
const char *dir)
{
DIR *dirh;
struct dirent *dent;
dirh = opendir (dir);
if (!dirh)
return;
while ((dent = readdir (dirh)))
{
PangoFBFontListing *pfd;
char *ctmp;
char buf[1024];
FT_Face ftf;
FT_Error ec;
int i = 0, n = 1;
ctmp = strrchr (dent->d_name, '.');
if (!ctmp ||
(strcasecmp (ctmp, ".ttf") &&
strcasecmp (ctmp, ".pfa") &&
strcasecmp (ctmp, ".pfb")))
continue;
g_snprintf (buf, sizeof(buf), "%s/%s", dir, dent->d_name);
while (i < n)
{
ec = FT_New_Face (gdk_fb_ft_lib, buf, i, &ftf);
if (ec)
break; /* error opening */
FT_Select_Charmap (ftf, ft_encoding_unicode);
n = ftf->num_faces;
if (!ftf->family_name || !ftf->style_name)
{
g_warning ("No family/style on %s", buf);
FT_Done_Face (ftf);
break;
}
pfd = g_new0 (PangoFBFontListing, 1);
/* Now add the item */
if (ftf->family_name[0] == '/')
pfd->desc.family_name = g_strdup (ftf->family_name+1);
else
pfd->desc.family_name = g_strdup (ftf->family_name);
pfd->desc.style = PANGO_STYLE_NORMAL;
pfd->desc.variant = PANGO_VARIANT_NORMAL;
pfd->desc.weight = PANGO_WEIGHT_NORMAL;
pfd->desc.stretch = PANGO_STRETCH_NORMAL;
if (ftf->style_name)
{
char lcstr[512];
strcpy (lcstr, ftf->style_name);
g_strdown (lcstr);
if (strstr (lcstr, "italic"))
pfd->desc.style = PANGO_STYLE_ITALIC;
else if (strstr (lcstr, "oblique"))
pfd->desc.style = PANGO_STYLE_OBLIQUE;
if (strstr (lcstr, "bold"))
pfd->desc.weight = PANGO_WEIGHT_BOLD;
if (strstr (lcstr, "condensed"))
pfd->desc.stretch = PANGO_STRETCH_CONDENSED;
else if (strstr (lcstr, "expanded"))
pfd->desc.stretch = PANGO_STRETCH_EXPANDED;
}
pfd->ftf = ftf;
g_ptr_array_add (descs, pfd);
i++;
}
}
closedir (dirh);
}
static guint
pango_font_description_hash (gconstpointer a)
{
const PangoFontDescription *fa = a;
return g_str_hash (fa->family_name) ^ (fa->style + fa->weight + fa->stretch + fa->variant + fa->size);
}
static void
pango_fb_font_map_init (PangoFBFontMap *fontmap)
{
static const char *font_dirs[] = {
"/usr/share/fonts/default/TrueType",
"/usr/share/fonts/default/Type1",
"/usr/lib/X11/fonts/TrueType",
"/usr/lib/X11/fonts/Type1",
NULL
};
int i;
fontmap->all_fonts = g_hash_table_new (pango_font_description_hash, (GEqualFunc)pango_font_description_equal);
fontmap->all_descs = g_ptr_array_new ();
for (i = 0; font_dirs[i]; i++)
list_fonts (fontmap, NULL, fontmap->all_descs, font_dirs[i]);
}
static void
pango_fb_font_map_list_fonts (PangoFontMap *fontmap,
const gchar *family,
PangoFontDescription ***descs,
int *n_descs)
{
PangoFBFontMap *fbfm = (PangoFBFontMap *)fontmap;
int i, n;
*descs = g_new (PangoFontDescription *, fbfm->all_descs->len);
*n_descs = fbfm->all_descs->len;
for (i = n = 0; i < fbfm->all_descs->len; i++)
{
PangoFontDescription *pfd = g_ptr_array_index (fbfm->all_descs, i);
if (strcasecmp (family, pfd->family_name))
continue;
(*descs)[n++] = pango_font_description_copy (pfd);
}
*n_descs = n;
*descs = g_realloc (*descs, n * sizeof(PangoFontDescription *));
}
struct famlist {
gchar **families;
int last_added;
};
static void
add_entry (gpointer key, gpointer value, gpointer data)
{
struct famlist *fl = data;
fl->families[fl->last_added++] = g_strdup (key);
}
static void
pango_fb_font_map_list_families (PangoFontMap *fontmap,
gchar ***families,
int *n_families)
{
PangoFBFontMap *fbfm = (PangoFBFontMap *)fontmap;
int i;
GHashTable *thash = g_hash_table_new (g_str_hash, g_str_equal);
struct famlist stickittome;
for(i = 0; i < fbfm->all_descs->len; i++)
{
PangoFBFontListing *fl = g_ptr_array_index (fbfm->all_descs, i);
g_hash_table_insert (thash, fl->desc.family_name, fl);
}
*n_families = g_hash_table_size (thash);
*families = g_new (gchar *, *n_families);
stickittome.families = *families;
stickittome.last_added = 0;
g_hash_table_foreach (thash, add_entry, &stickittome);
g_hash_table_destroy (thash);
}
static PangoFontMap *
pango_fb_font_map (void)
{
return g_object_new (pango_fb_font_map_get_type (), NULL);
}
PangoMap *
pango_fb_get_shaper_map (const char *lang)
{
static guint engine_type_id = 0;
static guint render_type_id = 0;
if (engine_type_id == 0)
{
engine_type_id = g_quark_try_string (PANGO_ENGINE_TYPE_SHAPE);
render_type_id = g_quark_try_string (PANGO_RENDER_TYPE_FB);
}
if (engine_type_id == 0)
{
engine_type_id = g_quark_from_static_string (PANGO_ENGINE_TYPE_SHAPE);
render_type_id = g_quark_from_static_string (PANGO_RENDER_TYPE_FB);
}
return pango_find_map (lang, engine_type_id, render_type_id);
}
/*************** Font impl *****************/
#define PANGO_FB_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_FB_FONT, PangoFBFontClass))
#define PANGO_FB_IS_FONT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_FB_FONT))
#define PANGO_FB_IS_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_FB_FONT))
#define PANGO_FB_FONT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_FB_FONT, PangoFBFontClass))
typedef struct _PangoFBFontClass PangoFBFontClass;
typedef struct _PangoFBMetricsInfo PangoFBMetricsInfo;
typedef struct _PangoFBContextInfo PangoFBContextInfo;
struct _PangoFBMetricsInfo
{
const char *lang;
PangoFontMetrics metrics;
};
struct _PangoFBContextInfo
{
};
struct _PangoFBFontClass
{
PangoFontClass parent_class;
};
static void pango_fb_font_class_init (PangoFBFontClass *class);
static void pango_fb_font_init (PangoFBFont *font);
static void pango_fb_font_finalize (GObject *object);
static PangoFontDescription *pango_fb_font_describe (PangoFont *font);
static PangoCoverage * pango_fb_font_get_coverage (PangoFont *font,
const char *lang);
static PangoEngineShape * pango_fb_font_find_shaper (PangoFont *font,
const char *lang,
guint32 ch);
static void pango_fb_font_get_glyph_extents (PangoFont *font,
PangoGlyph glyph,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect);
static void pango_fb_font_get_metrics (PangoFont *font,
const gchar *lang,
PangoFontMetrics *metrics);
GType
pango_fb_font_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
static const GTypeInfo object_info =
{
sizeof (PangoFBFontClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) pango_fb_font_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (PangoFBFont),
0, /* n_preallocs */
(GInstanceInitFunc) pango_fb_font_init,
};
object_type = g_type_register_static (PANGO_TYPE_FONT,
"PangoFBFont",
&object_info,
0);
}
return object_type;
}
static void
pango_fb_font_init (PangoFBFont *font)
{
font->desc.size = -1;
font->glyph_info = g_hash_table_new (NULL, NULL);
}
static gboolean
g_free_2(gpointer key, gpointer value, gpointer data)
{
PangoFBGlyphInfo *pgi = value;
g_free (pgi->fbd.drawable_data.mem);
g_free (value);
return TRUE;
}
static void
pango_fb_font_clear_extent_cache(PangoFBFont *fbf)
{
g_hash_table_foreach_remove (fbf->glyph_info, g_free_2, NULL);
}
PangoFBGlyphInfo *
pango_fb_font_get_glyph_info (PangoFont *font, PangoGlyph glyph)
{
PangoFBGlyphInfo *pgi;
PangoFBFont *fbf = PANGO_FB_FONT (font);
FT_Bitmap *renderme;
FT_GlyphSlot g;
PangoRectangle *my_logical_rect, *my_ink_rect;
FT_Face ftf;
gboolean free_buffer = FALSE;
ftf = fbf->ftf;
pango_fb_font_set_size (font);
pgi = g_hash_table_lookup (fbf->glyph_info, GUINT_TO_POINTER (glyph));
if (pgi)
return pgi;
pgi = g_new0 (PangoFBGlyphInfo, 1);
FT_Load_Glyph (ftf, glyph, FT_LOAD_DEFAULT);
g = ftf->glyph;
if (g->format != ft_glyph_format_bitmap)
{
FT_BitmapGlyph bgy;
int bdepth;
#if defined(USE_AA) || 1
#ifdef USE_FTGRAYS
bdepth = 256;
#else
bdepth = 128;
#endif
#else
bdepth = 0;
#endif
if (FT_Get_Glyph_Bitmap(ftf, glyph, 0, bdepth, NULL, &bgy))
g_error ("Glyph render failed");
renderme = &bgy->bitmap;
free_buffer = TRUE;
}
else
renderme = &g->bitmap;
pgi->fbd.drawable_data.mem = g_memdup (renderme->buffer, renderme->pitch * renderme->rows);
pgi->fbd.drawable_data.rowstride = renderme->pitch;
pgi->fbd.drawable_data.width = pgi->fbd.drawable_data.lim_x = renderme->width;
pgi->fbd.drawable_data.height = pgi->fbd.drawable_data.lim_y = renderme->rows;
switch (renderme->pixel_mode)
{
case ft_pixel_mode_mono:
pgi->fbd.drawable_data.depth = 1;
break;
case ft_pixel_mode_grays:
#if defined(USE_FTGRAYS)
pgi->fbd.drawable_data.depth = 78;
#else
pgi->fbd.drawable_data.depth = 77;
#endif
break;
default:
g_assert_not_reached ();
break;
}
my_ink_rect = &pgi->extents[0];
my_logical_rect = &pgi->extents[1];
{
my_ink_rect->width = (PANGO_SCALE * g->metrics.width) >> 6;
my_ink_rect->height = (PANGO_SCALE * g->metrics.height) >> 6;
my_ink_rect->x = - ((PANGO_SCALE * g->metrics.horiBearingX) >> 6);
my_ink_rect->y = - ((PANGO_SCALE * g->metrics.horiBearingY) >> 6);
}
{
my_logical_rect->width = (PANGO_SCALE * g->metrics.horiAdvance) >> 6;
my_logical_rect->height = (PANGO_SCALE * ftf->size->metrics.height) >> 6;
my_logical_rect->x = - ((PANGO_SCALE * g->metrics.horiBearingX) >> 6);
my_logical_rect->y = - ((PANGO_SCALE * ftf->size->metrics.ascender) >> 6);
}
pgi->hbearing = ((-g->metrics.horiBearingY) >> 6);
g_hash_table_insert (fbf->glyph_info, GUINT_TO_POINTER(glyph), pgi);
return pgi;
}
static void pango_fb_font_finalize (GObject *object)
{
PangoFBFont *fbf = PANGO_FB_FONT (object);
/* XXX FIXME g_hash_table_remove(ourfontmap, &fbf->desc); */
pango_coverage_unref (fbf->coverage);
g_free (fbf->desc.family_name);
pango_fb_font_clear_extent_cache (fbf);
g_hash_table_destroy (fbf->glyph_info);
}
static void
pango_fb_font_class_init (PangoFBFontClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
PangoFontClass *font_class = PANGO_FONT_CLASS (class);
object_class->finalize = pango_fb_font_finalize;
font_class->describe = pango_fb_font_describe;
font_class->get_coverage = pango_fb_font_get_coverage;
font_class->find_shaper = pango_fb_font_find_shaper;
font_class->get_glyph_extents = pango_fb_font_get_glyph_extents;
font_class->get_metrics = pango_fb_font_get_metrics;
}
static PangoFontDescription *
pango_fb_font_describe (PangoFont *font)
{
return pango_font_description_copy (&PANGO_FB_FONT(font)->desc);
}
static void
free_coverages_foreach (gpointer key,
gpointer value,
gpointer data)
{
pango_coverage_unref (value);
}
static PangoCoverage *
pango_fb_font_get_coverage (PangoFont *font,
const char *lang)
{
int i, n;
PangoCoverage *retval;
PangoMap *shape_map;
GHashTable *coverage_hash;
if (PANGO_FB_FONT (font)->coverage)
return pango_coverage_ref (PANGO_FB_FONT (font)->coverage);
shape_map = pango_fb_get_shaper_map (lang);
coverage_hash = g_hash_table_new (g_str_hash, g_str_equal);
retval = pango_coverage_new ();
n = MIN( 65536, PANGO_FB_FONT (font)->ftf->num_glyphs);
for(i = 0; i < n; i++)
{
PangoCoverageLevel font_level;
PangoMapEntry *map_entry;
map_entry = pango_map_get_entry (shape_map, i);
if (map_entry->info)
{
PangoCoverage *coverage;
coverage = g_hash_table_lookup (coverage_hash, map_entry->info->id);
if (!coverage)
{
PangoEngineShape *engine = (PangoEngineShape *)pango_map_get_engine (shape_map, i);
coverage = engine->get_coverage (font, lang);
g_hash_table_insert (coverage_hash, map_entry->info->id, coverage);
}
font_level = pango_coverage_get (coverage, i);
if (font_level == PANGO_COVERAGE_EXACT && !map_entry->is_exact)
font_level = PANGO_COVERAGE_APPROXIMATE;
if (font_level != PANGO_COVERAGE_NONE)
pango_coverage_set (retval, i, font_level);
}
}
g_hash_table_foreach (coverage_hash, free_coverages_foreach, NULL);
g_hash_table_destroy (coverage_hash);
PANGO_FB_FONT (font)->coverage = pango_coverage_ref (retval);
return retval;
}
static PangoEngineShape *
pango_fb_font_find_shaper (PangoFont *font,
const char *lang,
guint32 ch)
{
PangoMap *shape_map = NULL;
shape_map = pango_fb_get_shaper_map (lang);
return (PangoEngineShape *)pango_map_get_engine (shape_map, ch);
}
#if 0
/* freetype.h doesn't declare it, doh */
EXPORT_FUNC(FT_Error) FT_New_GlyphSlot( FT_Face face,
FT_GlyphSlot* aslot );
#endif
void
pango_fb_font_set_size (PangoFont *font)
{
PangoFBFont *fbf = (PangoFBFont *)font;
if (PANGO_FB_FONT (font)->desc.size != GPOINTER_TO_UINT (fbf->ftf->generic.data))
{
fbf->ftf->generic.data = GUINT_TO_POINTER (PANGO_FB_FONT (font)->desc.size);
FT_Set_Char_Size (fbf->ftf, 0, (PANGO_FB_FONT (font)->desc.size << 6)/PANGO_SCALE, 72, 72);
}
}
static void
pango_fb_font_get_glyph_extents (PangoFont *font,
PangoGlyph glyph,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect)
{
PangoFBFont *fbf;
PangoRectangle *my_extents;
PangoFBGlyphInfo *gi;
fbf = PANGO_FB_FONT (font);
pango_fb_font_set_size (font);
gi = pango_fb_font_get_glyph_info (font, glyph);
my_extents = gi->extents;
if (ink_rect)
*ink_rect = my_extents[0];
if (logical_rect)
*logical_rect = my_extents[1];
}
static void
pango_fb_font_get_metrics (PangoFont *font,
const gchar *lang,
PangoFontMetrics *metrics)
{
FT_Face ftf;
ftf = PANGO_FB_FONT (font)->ftf;
if (metrics)
{
metrics->ascent = ftf->ascender * PANGO_SCALE >> 6;
metrics->descent = ftf->descender * PANGO_SCALE >> 6;
}
}
/* The following array is supposed to contain enough text to tickle all necessary fonts for each
* of the languages in the following. Yes, it's pretty lame. Not all of the languages
* in the following have sufficient text to excercise all the accents for the language, and
* there are obviously many more languages to include as well.
*/
#if 0
LangInfo lang_texts[] = {
{ "ar", "Arabic السلام عليكم" },
{ "cs", "Czech (česky) Dobrý den" },
{ "da", "Danish (Dansk) Hej, Goddag" },
{ "el", "Greek (Ελληνικά) Γειά σας" },
{ "en", "English Hello" },
{ "eo", "Esperanto Saluton" },
{ "es", "Spanish (Español) ¡Hola!" },
{ "et", "Estonian Tere, Tervist" },
{ "fi", "Finnish (Suomi) Hei" },
{ "fr", "French (Français)" },
{ "de", "German Grüß Gott" },
{ "iw", "Hebrew שלום" },
{ "il", "Italiano Ciao, Buon giorno" },
{ "ja", "Japanese (日本語) こんにちは, コンニチハ" },
{ "ko", "Korean (한글) 안녕하세요, 안녕하십니까" },
{ "mt", "Maltese Ċaw, Saħħa" },
{ "nl", "Nederlands, Vlaams Hallo, Dag" },
{ "no", "Norwegian (Norsk) Hei, God dag" },
{ "pl", "Polish Dzień dobry, Hej" },
{ "ru", "Russian (Русский)" },
{ "sk", "Slovak Dobrý deň" },
{ "sv", "Swedish (Svenska) Hej, Goddag" },
{ "tr", "Turkish (Türkçe) Merhaba" },
{ "zh", "Chinese (中文,普通话,汉语)" }
};
#endif
/******** misc gdk tie-ins **********/
PangoContext *
gdk_pango_context_get (void)
{
PangoContext *retval;
static PangoFontMap *font_map = NULL;
if (!font_map)
font_map = pango_fb_font_map ();
retval = pango_context_new ();
pango_context_add_font_map (retval, font_map);
return retval;
}