diff options
Diffstat (limited to 'pango/pangocairo-atsuifont.c')
| -rw-r--r-- | pango/pangocairo-atsuifont.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/pango/pangocairo-atsuifont.c b/pango/pangocairo-atsuifont.c new file mode 100644 index 00000000..02b0d88b --- /dev/null +++ b/pango/pangocairo-atsuifont.c @@ -0,0 +1,271 @@ +/* Pango + * pangocairo-atsuifont.c + * + * Copyright (C) 2000-2005 Red Hat Software + * Copyright (C) 2005 Imendio AB + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#include "pangoatsui-private.h" +#include "pangocairo.h" +#include "pangocairo-private.h" +#include "pangocairo-atsui.h" +#include "pangocairo-atsuifont.h" + +struct _PangoCairoATSUIFont +{ + PangoATSUIFont font; + + ATSUFontID font_id; + cairo_font_face_t *font_face; + cairo_scaled_font_t *scaled_font; + cairo_matrix_t font_matrix; + cairo_matrix_t ctm; + cairo_font_options_t *options; + + double size; +}; + +struct _PangoCairoATSUIFontClass +{ + PangoATSUIFontClass parent_class; +}; + + + +static cairo_font_face_t *pango_cairo_atsui_font_get_font_face (PangoCairoFont *font); + +ATSUFontID +pango_cairo_atsui_font_get_atsu_font_id (PangoCairoATSUIFont *cafont) +{ + return cafont->font_id; +} + +static void +pango_cairo_atsui_font_install (PangoCairoFont *font, + cairo_t *cr) +{ + PangoCairoATSUIFont *cwfont = PANGO_CAIRO_ATSUI_FONT (font); + + cairo_set_font_face (cr, + pango_cairo_atsui_font_get_font_face (font)); + + cairo_set_font_matrix (cr, &cwfont->font_matrix); + cairo_set_font_options (cr, cwfont->options); +} + +static void +cairo_font_iface_init (PangoCairoFontIface *iface) +{ + iface->install = pango_cairo_atsui_font_install; +} + +G_DEFINE_TYPE_WITH_CODE (PangoCairoATSUIFont, pango_cairo_atsui_font, PANGO_TYPE_ATSUI_FONT, + { G_IMPLEMENT_INTERFACE (PANGO_TYPE_CAIRO_FONT, cairo_font_iface_init) }); + +static cairo_font_face_t * +pango_cairo_atsui_font_get_font_face (PangoCairoFont *font) +{ + PangoCairoATSUIFont *cafont = PANGO_CAIRO_ATSUI_FONT (font); + + if (!cafont->font_face) + { + cafont->font_face = cairo_atsui_font_face_create_for_atsu_font_id (cafont->font_id); + } + + return cafont->font_face; +} + +static cairo_scaled_font_t * +pango_cairo_atsui_font_get_scaled_font (PangoCairoFont *font) +{ + PangoCairoATSUIFont *cafont = PANGO_CAIRO_ATSUI_FONT (font); + + if (!cafont->scaled_font) + { + cairo_font_face_t *font_face; + + font_face = pango_cairo_atsui_font_get_font_face (font); + cafont->scaled_font = cairo_scaled_font_create (font_face, + &cafont->font_matrix, + &cafont->ctm, + cafont->options); + + /* Failure of the above should only occur for out of memory, + * we can't proceed at that point + */ + if (!cafont->scaled_font) + g_error ("Unable create Cairo font"); + } + + return cafont->scaled_font; +} + +static void +pango_cairo_atsui_font_get_glyph_extents (PangoFont *font, + PangoGlyph glyph, + PangoRectangle *ink_rect, + PangoRectangle *logical_rect) +{ + cairo_scaled_font_t *scaled_font; + cairo_text_extents_t extents; + cairo_glyph_t cairo_glyph; + + scaled_font = pango_cairo_atsui_font_get_scaled_font (PANGO_CAIRO_FONT (font)); + + cairo_glyph.index = glyph; + cairo_glyph.x = 0; + cairo_glyph.y = 0; + + cairo_scaled_font_glyph_extents (scaled_font, + &cairo_glyph, 1, &extents); + + if (ink_rect) + { + ink_rect->x = extents.x_bearing * PANGO_SCALE; + ink_rect->y = extents.y_bearing * PANGO_SCALE; + ink_rect->width = extents.width * PANGO_SCALE; + ink_rect->height = extents.height * PANGO_SCALE; + } + + if (logical_rect) + { + cairo_font_extents_t font_extents; + + cairo_scaled_font_extents (scaled_font, &font_extents); + + logical_rect->x = 0; + logical_rect->y = - font_extents.ascent * PANGO_SCALE; + logical_rect->width = extents.x_advance * PANGO_SCALE; + logical_rect->height = (font_extents.ascent + font_extents.descent) * PANGO_SCALE; + } +} + + +static PangoFontMetrics * +pango_cairo_atsui_font_get_metrics (PangoFont *font, + PangoLanguage *language) +{ + PangoCairoATSUIFont *cafont = PANGO_CAIRO_ATSUI_FONT (font); + ATSFontRef ats_font; + ATSFontMetrics ats_metrics; + PangoFontMetrics *metrics; + + ats_font = FMGetATSFontRefFromFont(cafont->font_id); + + ATSFontGetHorizontalMetrics (ats_font, kATSOptionFlagsDefault, &ats_metrics); + + metrics = pango_font_metrics_new (); + + metrics->ascent = ats_metrics.ascent * cafont->size * PANGO_SCALE; + metrics->descent = -ats_metrics.descent * cafont->size * PANGO_SCALE; + + metrics->approximate_char_width = ats_metrics.avgAdvanceWidth * cafont->size * PANGO_SCALE; + metrics->approximate_digit_width = ats_metrics.avgAdvanceWidth * cafont->size * PANGO_SCALE; + + metrics->underline_position = ats_metrics.underlinePosition * cafont->size * PANGO_SCALE; + metrics->underline_thickness = ats_metrics.underlineThickness * cafont->size * PANGO_SCALE; + + metrics->strikethrough_position = metrics->ascent / 3; + metrics->strikethrough_thickness = ats_metrics.underlineThickness * cafont->size * PANGO_SCALE; + + return metrics; +} + +static void +pango_cairo_atsui_font_finalize (GObject *object) +{ + PangoCairoATSUIFont *cafont = PANGO_CAIRO_ATSUI_FONT (object); + + cairo_font_face_destroy (cafont->font_face); + cairo_scaled_font_destroy (cafont->scaled_font); + cairo_font_options_destroy (cafont->options); + + G_OBJECT_CLASS (pango_cairo_atsui_font_parent_class)->finalize (object); +} + +static void +pango_cairo_atsui_font_class_init (PangoCairoATSUIFontClass *class) +{ + GObjectClass *object_class = G_OBJECT_CLASS (class); + PangoFontClass *font_class = PANGO_FONT_CLASS (class); + + object_class->finalize = pango_cairo_atsui_font_finalize; + + font_class->get_metrics = pango_cairo_atsui_font_get_metrics; + font_class->get_glyph_extents = pango_cairo_atsui_font_get_glyph_extents; +} + +static void +pango_cairo_atsui_font_init (PangoCairoATSUIFont *cafont) +{ +} + +PangoATSUIFont * +_pango_cairo_atsui_font_new (PangoCairoATSUIFontMap *cafontmap, + PangoContext *context, + const char *postscript_name, + const PangoFontDescription *desc) +{ + PangoCairoATSUIFont *cafont; + PangoATSUIFont *afont; + CFStringRef cfstr; + ATSFontRef font_ref; + const PangoMatrix *pango_ctm; + ATSUFontID font_id; + + cfstr = CFStringCreateWithCString (NULL, postscript_name, + kCFStringEncodingUTF8); + + font_ref = ATSFontFindFromPostScriptName (cfstr, kATSOptionFlagsDefault); + font_id = FMGetFontFromATSFontRef (font_ref); + + CFRelease (cfstr); + + if (!font_id) + return NULL; + + cafont = g_object_new (PANGO_TYPE_CAIRO_ATSUI_FONT, NULL); + afont = PANGO_ATSUI_FONT (cafont); + + afont->desc = pango_font_description_copy (desc); + afont->postscript_name = g_strdup (postscript_name); + + cafont->size = (double) pango_font_description_get_size (desc) / PANGO_SCALE; + cafont->font_id = font_id; + + if (!pango_font_description_get_size_is_absolute (desc)) + { + /* FIXME: Need to handle dpi here. See other font implementations for more info. */ + } + + cairo_matrix_init_scale (&cafont->font_matrix, cafont->size, cafont->size); + pango_ctm = pango_context_get_matrix (context); + if (pango_ctm) + cairo_matrix_init (&cafont->ctm, + pango_ctm->xx, + pango_ctm->yx, + pango_ctm->xy, + pango_ctm->yy, + 0., 0.); + else + cairo_matrix_init_identity (&cafont->ctm); + + cafont->options = cairo_font_options_copy (_pango_cairo_context_get_merged_font_options (context)); + + return afont; +} |