static const gchar * get_sample_string (FT_Face face) { const gchar *text; text = pango_language_get_sample_string (NULL); if (!check_font_contain_text (face, text)) { text = pango_language_get_sample_string (pango_language_from_string ("en_US")); } return text; }
static PangoFontMetrics * create_metrics_for_context (PangoFont *font, PangoContext *context) { PangoCairoWin32Font *cwfont = PANGO_CAIRO_WIN32_FONT (font); PangoFontMetrics *metrics; PangoFontDescription *font_desc; PangoLayout *layout; PangoRectangle extents; PangoLanguage *language = pango_context_get_language (context); const char *sample_str = pango_language_get_sample_string (language); cairo_scaled_font_t *scaled_font; cairo_font_extents_t font_extents; double height; metrics = pango_font_metrics_new (); scaled_font = pango_cairo_win32_font_get_scaled_font (PANGO_CAIRO_FONT (cwfont)); cairo_scaled_font_extents (scaled_font, &font_extents); cairo_win32_scaled_font_done_font (scaled_font); metrics->ascent = font_extents.ascent * PANGO_SCALE; metrics->descent = font_extents.descent * PANGO_SCALE; /* FIXME: Should get the real settings for these from the TrueType * font file. */ height = metrics->ascent + metrics->descent; metrics->underline_thickness = height / 14; metrics->underline_position = - metrics->underline_thickness; metrics->strikethrough_thickness = metrics->underline_thickness; metrics->strikethrough_position = height / 4; pango_quantize_line_geometry (&metrics->underline_thickness, &metrics->underline_position); pango_quantize_line_geometry (&metrics->strikethrough_thickness, &metrics->strikethrough_position); layout = pango_layout_new (context); font_desc = pango_font_describe_with_absolute_size (font); pango_layout_set_font_description (layout, font_desc); pango_layout_set_text (layout, sample_str, -1); pango_layout_get_extents (layout, NULL, &extents); metrics->approximate_char_width = extents.width / g_utf8_strlen (sample_str, -1); pango_layout_set_text (layout, "0123456789", -1); metrics->approximate_digit_width = max_glyph_width (layout); pango_font_description_free (font_desc); g_object_unref (layout); return metrics; }
static gboolean set_pango_sample_string (SushiFontWidget *self) { const gchar *sample_string; gboolean retval = FALSE; sample_string = pango_language_get_sample_string (pango_language_from_string (NULL)); if (check_font_contain_text (self->priv->face, sample_string)) retval = TRUE; if (!retval) { sample_string = pango_language_get_sample_string (pango_language_from_string ("C")); if (check_font_contain_text (self->priv->face, sample_string)) retval = TRUE; } if (retval) { g_free (self->priv->sample_string); self->priv->sample_string = g_strdup (sample_string); } return retval; }
static PangoFontMetrics * pango_cairo_win32_font_get_metrics (PangoFont *font, PangoLanguage *language) { PangoWin32Font *win32font = PANGO_WIN32_FONT (font); PangoCairoWin32Font *cwfont = PANGO_CAIRO_WIN32_FONT (font); PangoWin32MetricsInfo *info = NULL; /* Quiet gcc */ GSList *tmp_list; const char *sample_str = pango_language_get_sample_string (language); tmp_list = cwfont->metrics_by_lang; while (tmp_list) { info = tmp_list->data; if (info->sample_str == sample_str) /* We _don't_ need strcmp */ break; tmp_list = tmp_list->next; } if (!tmp_list) { PangoContext *context; if (!win32font->fontmap) return pango_font_metrics_new (); info = g_slice_new0 (PangoWin32MetricsInfo); cwfont->metrics_by_lang = g_slist_prepend (cwfont->metrics_by_lang, info); info->sample_str = sample_str; context = pango_context_new (); pango_context_set_font_map (context, win32font->fontmap); pango_context_set_language (context, language); pango_cairo_context_set_font_options (context, cwfont->options); info->metrics = create_metrics_for_context (font, context); g_object_unref (context); } return pango_font_metrics_ref (info->metrics); }
static PangoFontMetrics * pango_cairo_core_text_font_create_base_metrics_for_context (PangoCairoFont *font, PangoContext *context) { PangoCoreTextFont *cfont = (PangoCoreTextFont *) font; PangoFontMetrics *metrics; PangoFontDescription *font_desc; PangoLayout *layout; PangoRectangle extents; PangoLanguage *language = pango_context_get_language (context); const char *sample_str = pango_language_get_sample_string (language); CTFontRef ctfont; metrics = pango_font_metrics_new (); ctfont = pango_core_text_font_get_ctfont (cfont); metrics->ascent = CTFontGetAscent (ctfont) * PANGO_SCALE; metrics->descent = CTFontGetDescent (ctfont) * PANGO_SCALE; metrics->underline_position = CTFontGetUnderlinePosition (ctfont) * PANGO_SCALE; metrics->underline_thickness = CTFontGetUnderlineThickness (ctfont) * PANGO_SCALE; metrics->strikethrough_position = metrics->ascent / 3; metrics->strikethrough_thickness = CTFontGetUnderlineThickness (ctfont) * PANGO_SCALE; layout = pango_layout_new (context); font_desc = pango_font_describe_with_absolute_size ((PangoFont *) font); pango_layout_set_font_description (layout, font_desc); pango_layout_set_text (layout, sample_str, -1); pango_layout_get_extents (layout, NULL, &extents); metrics->approximate_char_width = extents.width / pango_utf8_strwidth (sample_str); pango_layout_set_text (layout, "0123456789", -1); metrics->approximate_digit_width = max_glyph_width (layout); pango_font_description_free (font_desc); g_object_unref (layout); return metrics; }
static void gtk_font_chooser_default_init (GtkFontChooserInterface *iface) { /** * GtkFontChooser:font: * * The font description as a string, e.g. "Sans Italic 12". */ g_object_interface_install_property (iface, g_param_spec_string ("font", P_("Font"), P_("Font description as a string, e.g. \"Sans Italic 12\""), GTK_FONT_CHOOSER_DEFAULT_FONT_NAME, GTK_PARAM_READWRITE)); /** * GtkFontChooser:font-desc: * * The font description as a #PangoFontDescription. */ g_object_interface_install_property (iface, g_param_spec_boxed ("font-desc", P_("Font description"), P_("Font description as a PangoFontDescription struct"), PANGO_TYPE_FONT_DESCRIPTION, GTK_PARAM_READWRITE)); /** * GtkFontChooser:preview-text: * * The string with which to preview the font. */ g_object_interface_install_property (iface, g_param_spec_string ("preview-text", P_("Preview text"), P_("The text to display in order to demonstrate the selected font"), pango_language_get_sample_string (NULL), GTK_PARAM_READWRITE)); /** * GtkFontChooser:show-preview-entry: * * Whether to show an entry to change the preview text. */ g_object_interface_install_property (iface, g_param_spec_boolean ("show-preview-entry", P_("Show preview text entry"), P_("Whether the preview text entry is shown or not"), TRUE, GTK_PARAM_READWRITE)); /** * GtkFontChooser::font-activated: * @self: the object which received the signal * @fontname: the font name * * Emitted when a font is activated. * This usually happens when the user double clicks an item, * or an item is selected and the user presses one of the keys * Space, Shift+Space, Return or Enter. */ chooser_signals[SIGNAL_FONT_ACTIVATED] = g_signal_new ("font-activated", GTK_TYPE_FONT_CHOOSER, G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GtkFontChooserIface, font_activated), NULL, NULL, NULL, G_TYPE_NONE, 1, G_TYPE_STRING); }
static GdkPixmap * create_text_pixmap(GtkWidget *drawing_area, FT_Face face) { gint i, pixmap_width, pixmap_height, pos_y, textlen; GdkPixmap *pixmap = NULL; const gchar *text; Display *xdisplay; Drawable xdrawable; Visual *xvisual; Colormap xcolormap; XftDraw *draw; XftColor colour; XGlyphInfo extents; XftFont *font; gint *sizes = NULL, n_sizes, alpha_size; FcCharSet *charset = NULL; cairo_t *cr; GdkWindow *window = gtk_widget_get_window (drawing_area); text = pango_language_get_sample_string(NULL); if (! check_font_contain_text (face, text)) { pango_language_get_sample_string (pango_language_from_string ("en_US")); } textlen = strlen(text); /* create the XftDraw */ xdisplay = GDK_PIXMAP_XDISPLAY(window); #if GTK_CHECK_VERSION(3, 0, 0) xvisual = GDK_VISUAL_XVISUAL(gdk_window_get_visual(window)); #else xvisual = GDK_VISUAL_XVISUAL(gdk_drawable_get_visual(window)); #endif xcolormap = GDK_COLORMAP_XCOLORMAP(gdk_drawable_get_colormap(window)); XftColorAllocName(xdisplay, xvisual, xcolormap, "black", &colour); /* work out what sizes to render */ if (FT_IS_SCALABLE(face)) { n_sizes = 8; sizes = g_new(gint, n_sizes); sizes[0] = 8; sizes[1] = 10; sizes[2] = 12; sizes[3] = 18; sizes[4] = 24; sizes[5] = 36; sizes[6] = 48; sizes[7] = 72; alpha_size = 24; } else { /* use fixed sizes */ n_sizes = face->num_fixed_sizes; sizes = g_new(gint, n_sizes); alpha_size = 0; for (i = 0; i < face->num_fixed_sizes; i++) { sizes[i] = face->available_sizes[i].height; /* work out which font size to render */ if (face->available_sizes[i].height <= 24) alpha_size = face->available_sizes[i].height; } } /* calculate size of pixmap to use (with 4 pixels padding) ... */ pixmap_width = 8; pixmap_height = 8; font = get_font(xdisplay, face, alpha_size, charset); charset = FcCharSetCopy (font->charset); XftTextExtentsUtf8(xdisplay, font, (guchar *)lowercase_text, strlen(lowercase_text), &extents); pixmap_height += extents.height + 4; pixmap_width = MAX(pixmap_width, 8 + extents.width); XftTextExtentsUtf8(xdisplay, font, (guchar *)uppercase_text, strlen(uppercase_text), &extents); pixmap_height += extents.height + 4; pixmap_width = MAX(pixmap_width, 8 + extents.width); XftTextExtentsUtf8(xdisplay, font, (guchar *)punctuation_text, strlen(punctuation_text), &extents); pixmap_height += extents.height + 4; pixmap_width = MAX(pixmap_width, 8 + extents.width); XftFontClose(xdisplay, font); pixmap_height += 8; for (i = 0; i < n_sizes; i++) { font = get_font(xdisplay, face, sizes[i], charset); if (!font) continue; XftTextExtentsUtf8(xdisplay, font, (guchar *)text, textlen, &extents); pixmap_height += extents.height + 4; pixmap_width = MAX(pixmap_width, 8 + extents.width); XftFontClose(xdisplay, font); } /* create pixmap */ gtk_widget_set_size_request(drawing_area, pixmap_width, pixmap_height); pixmap = gdk_pixmap_new(window, pixmap_width, pixmap_height, -1); if (!pixmap) goto end; cr = gdk_cairo_create (pixmap); cairo_set_source_rgb (cr, 1, 1, 1); cairo_paint (cr); cairo_destroy (cr); xdrawable = GDK_DRAWABLE_XID(pixmap); draw = XftDrawCreate(xdisplay, xdrawable, xvisual, xcolormap); /* draw text */ pos_y = 4; font = get_font(xdisplay, face, alpha_size, charset); draw_string(xdisplay, draw, font, &colour, lowercase_text, &pos_y); draw_string(xdisplay, draw, font, &colour, uppercase_text, &pos_y); draw_string(xdisplay, draw, font, &colour, punctuation_text, &pos_y); XftFontClose(xdisplay, font); pos_y += 8; for (i = 0; i < n_sizes; i++) { font = get_font(xdisplay, face, sizes[i], charset); if (!font) continue; draw_string(xdisplay, draw, font, &colour, text, &pos_y); XftFontClose(xdisplay, font); } g_signal_connect(drawing_area, "expose-event", G_CALLBACK(expose_event), pixmap); end: g_free(sizes); FcCharSetDestroy (charset); return pixmap; }
PangoFontMetrics * _pango_cairo_font_get_metrics (PangoFont *font, PangoLanguage *language) { PangoCairoFont *cfont = (PangoCairoFont *) font; PangoCairoFontPrivate *cf_priv = PANGO_CAIRO_FONT_PRIVATE (font); PangoCairoFontMetricsInfo *info = NULL; /* Quiet gcc */ GSList *tmp_list; const char *sample_str = pango_language_get_sample_string (language); tmp_list = cf_priv->metrics_by_lang; while (tmp_list) { info = tmp_list->data; if (info->sample_str == sample_str) /* We _don't_ need strcmp */ break; tmp_list = tmp_list->next; } if (!tmp_list) { PangoFontMap *fontmap; PangoContext *context; cairo_font_options_t *font_options; int height, shift; /* XXX this is racy. need a ref'ing getter... */ fontmap = pango_font_get_font_map (font); if (!fontmap) return pango_font_metrics_new (); fontmap = g_object_ref (fontmap); info = g_slice_new0 (PangoCairoFontMetricsInfo); cf_priv->metrics_by_lang = g_slist_prepend (cf_priv->metrics_by_lang, info); info->sample_str = sample_str; context = pango_font_map_create_context (fontmap); pango_context_set_language (context, language); font_options = cairo_font_options_create (); cairo_scaled_font_get_font_options (_pango_cairo_font_private_get_scaled_font (cf_priv), font_options); pango_cairo_context_set_font_options (context, font_options); cairo_font_options_destroy (font_options); info->metrics = (* PANGO_CAIRO_FONT_GET_IFACE (font)->create_metrics_for_context) (cfont, context); /* We may actually reuse ascent/descent we got from cairo here. that's * in cf_priv->font_extents. */ height = info->metrics->ascent + info->metrics->descent; switch (cf_priv->gravity) { default: case PANGO_GRAVITY_AUTO: case PANGO_GRAVITY_SOUTH: break; case PANGO_GRAVITY_NORTH: info->metrics->ascent = info->metrics->descent; break; case PANGO_GRAVITY_EAST: case PANGO_GRAVITY_WEST: { int ascent = height / 2; if (cf_priv->is_hinted) ascent = PANGO_UNITS_ROUND (ascent); info->metrics->ascent = ascent; } } shift = (height - info->metrics->ascent) - info->metrics->descent; info->metrics->descent += shift; info->metrics->underline_position -= shift; info->metrics->strikethrough_position -= shift; info->metrics->ascent = height - info->metrics->descent; g_object_unref (context); g_object_unref (fontmap); } return pango_font_metrics_ref (info->metrics); }
PangoFontMetrics * _pango_cairo_font_get_metrics (PangoFont *font, PangoLanguage *language) { PangoCairoFont *cfont = (PangoCairoFont *) font; PangoCairoFontPrivate *cf_priv = PANGO_CAIRO_FONT_PRIVATE (font); PangoCairoFontMetricsInfo *info = NULL; /* Quiet gcc */ GSList *tmp_list; const char *sample_str = pango_language_get_sample_string (language); tmp_list = cf_priv->metrics_by_lang; while (tmp_list) { info = tmp_list->data; if (info->sample_str == sample_str) /* We _don't_ need strcmp */ break; tmp_list = tmp_list->next; } if (!tmp_list) { PangoFontMap *fontmap; PangoContext *context; cairo_font_options_t *font_options; PangoLayout *layout; PangoRectangle extents; PangoFontDescription *desc; cairo_scaled_font_t *scaled_font; cairo_matrix_t cairo_matrix; PangoMatrix pango_matrix; PangoMatrix identity = PANGO_MATRIX_INIT; int height, shift; /* XXX this is racy. need a ref'ing getter... */ fontmap = pango_font_get_font_map (font); if (!fontmap) return pango_font_metrics_new (); fontmap = g_object_ref (fontmap); info = g_slice_new0 (PangoCairoFontMetricsInfo); cf_priv->metrics_by_lang = g_slist_prepend (cf_priv->metrics_by_lang, info); info->sample_str = sample_str; scaled_font = _pango_cairo_font_private_get_scaled_font (cf_priv); context = pango_font_map_create_context (fontmap); pango_context_set_language (context, language); font_options = cairo_font_options_create (); cairo_scaled_font_get_font_options (scaled_font, font_options); pango_cairo_context_set_font_options (context, font_options); cairo_font_options_destroy (font_options); info->metrics = (* PANGO_CAIRO_FONT_GET_IFACE (font)->create_base_metrics_for_context) (cfont, context); /* We now need to adjust the base metrics for ctm */ cairo_scaled_font_get_ctm (scaled_font, &cairo_matrix); pango_matrix.xx = cairo_matrix.xx; pango_matrix.yx = cairo_matrix.yx; pango_matrix.xy = cairo_matrix.xy; pango_matrix.yy = cairo_matrix.yy; pango_matrix.x0 = 0; pango_matrix.y0 = 0; if (G_UNLIKELY (0 != memcmp (&identity, &pango_matrix, 4 * sizeof (double)))) { double xscale = pango_matrix_get_font_scale_factor (&pango_matrix); if (xscale) xscale = 1 / xscale; info->metrics->ascent *= xscale; info->metrics->descent *= xscale; info->metrics->underline_position *= xscale; info->metrics->underline_thickness *= xscale; info->metrics->strikethrough_position *= xscale; info->metrics->strikethrough_thickness *= xscale; } /* Set the matrix on the context so we don't have to adjust the derived * metrics. */ pango_context_set_matrix (context, &pango_matrix); /* Update approximate_*_width now */ layout = pango_layout_new (context); desc = pango_font_describe_with_absolute_size (font); pango_layout_set_font_description (layout, desc); pango_font_description_free (desc); pango_layout_set_text (layout, sample_str, -1); pango_layout_get_extents (layout, NULL, &extents); info->metrics->approximate_char_width = extents.width / pango_utf8_strwidth (sample_str); pango_layout_set_text (layout, "0123456789", -1); info->metrics->approximate_digit_width = max_glyph_width (layout); g_object_unref (layout); /* We may actually reuse ascent/descent we got from cairo here. that's * in cf_priv->font_extents. */ height = info->metrics->ascent + info->metrics->descent; switch (cf_priv->gravity) { default: case PANGO_GRAVITY_AUTO: case PANGO_GRAVITY_SOUTH: break; case PANGO_GRAVITY_NORTH: info->metrics->ascent = info->metrics->descent; break; case PANGO_GRAVITY_EAST: case PANGO_GRAVITY_WEST: { int ascent = height / 2; if (cf_priv->is_hinted) ascent = PANGO_UNITS_ROUND (ascent); info->metrics->ascent = ascent; } } shift = (height - info->metrics->ascent) - info->metrics->descent; info->metrics->descent += shift; info->metrics->underline_position -= shift; info->metrics->strikethrough_position -= shift; info->metrics->ascent = height - info->metrics->descent; g_object_unref (context); g_object_unref (fontmap); } return pango_font_metrics_ref (info->metrics); }