/* Pango * pangocairowin32-font.c: Cairo font handling, fontconfig backend * * Copyright (C) 2000-2005 Red Hat Software * * 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 "config.h" #include #include #include #include "pango-fontmap.h" #include "pangocairo-private.h" #include "pangocairo-win32.h" #include #define PANGO_TYPE_CAIRO_WIN32_FONT (pango_cairo_win32_font_get_type ()) #define PANGO_CAIRO_WIN32_FONT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_CAIRO_WIN32_FONT, PangoCairoWin32Font)) #define PANGO_CAIRO_WIN32_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_CAIRO_WIN32_FONT, PangoCairoWin32FontClass)) #define PANGO_CAIRO_IS_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_CAIRO_WIN32_FONT)) #define PANGO_CAIRO_WIN32_FONT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_CAIRO_WIN32_FONT, PangoCairoWin32FontClass)) typedef struct _PangoCairoWin32Font PangoCairoWin32Font; typedef struct _PangoCairoWin32FontClass PangoCairoWin32FontClass; struct _PangoCairoWin32Font { PangoWin32Font font; int size; 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; PangoFontMetrics *metrics; }; struct _PangoCairoWin32FontClass { PangoWin32FontClass parent_class; }; GType pango_cairo_win32_font_get_type (void); /******************************* * Utility functions * *******************************/ static cairo_font_face_t * pango_cairo_win32_font_get_font_face (PangoCairoFont *font) { PangoCairoWin32Font *cwfont = PANGO_CAIRO_WIN32_FONT (font); PangoWin32Font *win32font = PANGO_WIN32_FONT (cwfont); if (cwfont->font_face == NULL) { LOGFONTW logfontw; /* Count here on the fact that all the struct fields are * in the same place for LOGFONTW and LOGFONTA and LOGFONTA * is smaller */ memcpy (&logfontw, &win32font->logfont, sizeof (LOGFONTA)); if (!MultiByteToWideChar (CP_ACP, MB_ERR_INVALID_CHARS, win32font->logfont.lfFaceName, -1, logfontw.lfFaceName, G_N_ELEMENTS (logfontw.lfFaceName))) logfontw.lfFaceName[0] = 0; /* Hopefully this will select some font */ cwfont->font_face = cairo_win32_font_face_create_for_logfontw (&logfontw); /* Failure of the above should only occur for out of memory, * we can't proceed at that point */ if (!cwfont->font_face) g_error ("Unable create Cairo font"); } return cwfont->font_face; } static cairo_scaled_font_t * pango_cairo_win32_font_get_scaled_font (PangoCairoFont *font) { PangoCairoWin32Font *cffont = PANGO_CAIRO_WIN32_FONT (font); if (!cffont->scaled_font) { cairo_font_face_t *font_face; font_face = pango_cairo_win32_font_get_font_face (font); cffont->scaled_font = cairo_scaled_font_create (font_face, &cffont->font_matrix, &cffont->ctm, cffont->options); /* Failure of the above should only occur for out of memory, * we can't proceed at that point */ if (!cffont->scaled_font) g_error ("Unable create Cairo font"); } return cffont->scaled_font; } /******************************** * Method implementations * ********************************/ static void pango_cairo_win32_font_install (PangoCairoFont *font, cairo_t *cr) { PangoCairoWin32Font *cffont = PANGO_CAIRO_WIN32_FONT (font); cairo_set_font_face (cr, pango_cairo_win32_font_get_font_face (font)); cairo_set_font_matrix (cr, &cffont->font_matrix); } static void cairo_font_iface_init (PangoCairoFontIface *iface) { iface->install = pango_cairo_win32_font_install; } G_DEFINE_TYPE_WITH_CODE (PangoCairoWin32Font, pango_cairo_win32_font, PANGO_TYPE_WIN32_FONT, { G_IMPLEMENT_INTERFACE (PANGO_TYPE_CAIRO_FONT, cairo_font_iface_init) }); static void pango_cairo_win32_font_finalize (GObject *object) { PangoCairoWin32Font *cwfont = PANGO_CAIRO_WIN32_FONT (object); if (cwfont->metrics) pango_font_metrics_unref (cwfont->metrics); if (cwfont->scaled_font) cairo_scaled_font_destroy (cwfont->scaled_font); if (cwfont->options) cairo_font_options_destroy (cwfont->options); G_OBJECT_CLASS (pango_cairo_win32_font_parent_class)->finalize (object); } static void pango_cairo_win32_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_win32_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_win32_font_get_metrics (PangoFont *font, PangoLanguage *language) { PangoCairoWin32Font *cwfont = PANGO_CAIRO_WIN32_FONT (font); if (!cwfont->metrics) { double height; cairo_scaled_font_t *scaled_font; cairo_font_extents_t font_extents; cwfont->metrics = pango_font_metrics_new (); scaled_font = pango_cairo_win32_font_get_scaled_font (PANGO_CAIRO_FONT (font)); cairo_scaled_font_extents (scaled_font, &font_extents); cwfont->metrics->ascent = font_extents.ascent * PANGO_SCALE; cwfont->metrics->descent = font_extents.ascent * PANGO_SCALE; cwfont->metrics->approximate_char_width = font_extents.max_x_advance * PANGO_SCALE; cwfont->metrics->approximate_digit_width = font_extents.max_x_advance * PANGO_SCALE; height = font_extents.ascent + font_extents.descent; cwfont->metrics->underline_thickness = (PANGO_SCALE * height) / 14; cwfont->metrics->underline_position = - cwfont->metrics->underline_thickness; cwfont->metrics->strikethrough_thickness = cwfont->metrics->underline_thickness; cwfont->metrics->strikethrough_position = (PANGO_SCALE * height) / 4; } return pango_font_metrics_ref (cwfont->metrics); } static gboolean pango_cairo_win32_font_select_font (PangoFont *font, HDC hdc) { cairo_scaled_font_t *scaled_font = pango_cairo_win32_font_get_scaled_font (PANGO_CAIRO_FONT (font)); return cairo_win32_scaled_font_select_font (scaled_font, hdc) == CAIRO_STATUS_SUCCESS; } static void pango_cairo_win32_font_done_font (PangoFont *font) { cairo_scaled_font_t *scaled_font = pango_cairo_win32_font_get_scaled_font (PANGO_CAIRO_FONT (font)); cairo_win32_scaled_font_done_font (scaled_font); } static double pango_cairo_win32_font_get_metrics_factor (PangoFont *font) { PangoWin32Font *win32font = PANGO_WIN32_FONT (font); cairo_scaled_font_t *scaled_font = pango_cairo_win32_font_get_scaled_font (PANGO_CAIRO_FONT (font)); return cairo_win32_scaled_font_get_metrics_factor (scaled_font) * win32font->size; } static void pango_cairo_win32_font_class_init (PangoCairoWin32FontClass *class) { GObjectClass *object_class = G_OBJECT_CLASS (class); PangoFontClass *font_class = PANGO_FONT_CLASS (class); PangoWin32FontClass *win32_font_class = PANGO_WIN32_FONT_CLASS (class); object_class->finalize = pango_cairo_win32_font_finalize; font_class->get_glyph_extents = pango_cairo_win32_font_get_glyph_extents; font_class->get_metrics = pango_cairo_win32_font_get_metrics; win32_font_class->select_font = pango_cairo_win32_font_select_font; win32_font_class->done_font = pango_cairo_win32_font_done_font; win32_font_class->get_metrics_factor = pango_cairo_win32_font_get_metrics_factor; } static void pango_cairo_win32_font_init (PangoCairoWin32Font *cwfont) { } /******************** * Private API * ********************/ PangoFont * _pango_cairo_win32_font_new (PangoCairoWin32FontMap *cwfontmap, PangoContext *context, PangoWin32Face *face, const PangoFontDescription *desc) { PangoCairoWin32Font *cwfont; PangoWin32Font *win32font; const PangoMatrix *pango_ctm; double size; double dpi; cwfont = g_object_new (PANGO_TYPE_CAIRO_WIN32_FONT, NULL); win32font = PANGO_WIN32_FONT (cwfont); win32font->fontmap = PANGO_FONT_MAP (cwfontmap); g_object_ref (cwfontmap); win32font->win32face = face; size = (double) pango_font_description_get_size (desc) / PANGO_SCALE; if (context) { dpi = pango_cairo_context_get_resolution (context); if (dpi <= 0) dpi = cwfontmap->dpi; } else dpi = cwfontmap->dpi; if (!pango_font_description_get_size_is_absolute (desc)) size *= dpi / 72.; /* FIXME: This is a pixel size, so not really what we want for describe(), * but it's what we need when computing the scale factor. */ win32font->size = size * PANGO_SCALE; cairo_matrix_init_scale (&cwfont->font_matrix, size, size); pango_ctm = pango_context_get_matrix (context); if (pango_ctm) cairo_matrix_init (&cwfont->ctm, pango_ctm->xx, pango_ctm->yx, pango_ctm->xy, pango_ctm->yy, 0., 0.); else cairo_matrix_init_identity (&cwfont->ctm); pango_win32_make_matching_logfont (win32font->fontmap, &face->logfont, win32font->size, &win32font->logfont); cffont->options = cairo_font_options_copy (_pango_cairo_context_get_merged_font_options (context)); return PANGO_FONT (cwfont); }