+ scherzo_key_init (&score->key, key);
+}
+
+
+/* Returns in brace_width the width of the brace */
+static void
+_draw_brace (score_t *score, cairo_t *cr,
+ score_brace_t *brace, int *brace_width)
+{
+ cairo_glyph_t brace_glyph;
+ cairo_text_extents_t brace_extents;
+ double top, bottom;
+
+ if (brace->num_staves == 0)
+ return;
+
+ cairo_save (cr);
+
+ top = score->staves[brace->first_staff]->y_pos;
+ bottom = score->staves[brace->first_staff + brace->num_staves - 1]->y_pos + score->staff_height;
+
+ cairo_select_font_face (cr, "Gonville-Brace", 0, 0);
+
+ /* XXX: This hard-coded glyph index is pretty ugly. We should
+ * figure out how to lookup the glyph we want, (though, as it
+ * turns out, this brace font pretty much just has numbered glyph
+ * names for different sizes, so it wouldn't be all that different
+ * than just the bare index here). */
+ brace_glyph.index = 300;
+ brace_glyph.x = 0;
+ brace_glyph.y = top + (bottom - top) / 2.0 + score->line_width / 2.0;
+
+ /* XXX: This font size (in conjunction with the glyph selection)
+ * is a rough guess at best. We should figure out how the brace
+ * font is intended to be used and actually measure to find the
+ * correctly-sized glyph. */
+ cairo_set_font_size (cr, (bottom - top) / 3.85);
+
+ cairo_glyph_extents (cr, &brace_glyph, 1, &brace_extents);
+
+ /* Subtract space for brace itself */
+ cairo_translate (cr, -brace_extents.x_bearing, 0);
+
+ cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
+ cairo_show_glyphs (cr, &brace_glyph, 1);
+
+ cairo_restore (cr);
+
+ *brace_width = (int) -brace_extents.x_bearing;
+}
+
+/* Line containing middle C for the given clef. */
+static int
+_score_clef_c_line (score_clef_t clef)
+{
+ switch (clef)
+ {
+ default:
+ case SCORE_CLEF_G:
+ return 5;
+ case SCORE_CLEF_F:
+ return -1;
+ }
+}
+
+/* On which line would 'pitch' appear on 'staff'.
+ *
+ * Lines are numbered with line 0 as the top full line of the staff
+ * and increasing downward. So line values less than 0 will appear as
+ * ledger lines above the staff while line values greater than 4 will
+ * appear on ledger lines below the staff.
+ *
+ * A line value of 2 will be centered verticall on the staff.
+ *
+ * For notes appearing on a space, the line value will be half-way
+ * between two integers. */
+static double
+_score_staff_pitch_to_line (score_staff_t *staff, pitch_t pitch)
+{
+ pitch_name_t name = PITCH_NAME (pitch);
+ int octave = PITCH_OCTAVE (pitch);
+ int c_line = _score_clef_c_line (staff->clef);
+
+ return c_line - (name - PITCH_NAME_C) / 2.0 - 3.5 * (octave - 4);
+}
+
+/* chord->width is updated as a side effect */
+static void
+_draw_chord (score_t *score, cairo_t *cr,
+ score_staff_t *staff, score_chord_t *chord)
+{
+ PangoRectangle ink_extents;
+ PangoRectangle logical_extents;
+ double total_staff_height;
+ PangoLayout *layout;
+ PangoFontDescription *font_description;
+
+ /* XXX: The staff should manage this height itself. */
+ total_staff_height = (staff->upper_ledger_lines * score->space_height +
+ score->staff_height +
+ staff->lower_ledger_lines * score->space_height);
+
+ cairo_save (cr);
+
+ font_description = pango_font_description_new ();
+ pango_font_description_set_family (font_description, "serif");
+ pango_font_description_set_absolute_size (font_description,
+ score->space_height * 3 * PANGO_SCALE);
+
+ layout = pango_cairo_create_layout (cr);
+ pango_layout_set_font_description (layout, font_description);
+ pango_layout_set_markup (layout, chord->name, -1);
+
+ pango_layout_line_get_pixel_extents (pango_layout_get_line (layout, 0),
+ &ink_extents, &logical_extents);
+
+ if (staff->clef == SCORE_CLEF_G)
+ cairo_move_to (cr, 0, - score->space_height * 0.5);
+ else
+ cairo_move_to (cr, 0, score->space_height * 0.5 + total_staff_height +
+ logical_extents.height);
+
+ pango_cairo_show_layout_line (cr, pango_layout_get_line (layout, 0));
+
+ g_object_unref (layout);
+ pango_font_description_free (font_description);
+
+ chord->width = logical_extents.width;
+
+ cairo_restore (cr);
+}
+
+/* Draw 'note' at its correct position on 'staff'.
+ * If the accidental of 'note' is not contained within the current
+ * key, then draw the accidental as well.
+ *
+ * As a special case, if the note's duration is 0, draw the accidental
+ * alone, regardless of the key. This is useful for drawing the
+ * accidentals of the key signature.
+ *
+ * Returns the width of the drawn glyphs.
+ */
+static double
+_draw_note (score_t *score, cairo_t *cr,
+ score_staff_t *staff, score_note_t *note)
+{
+ double line;
+ cairo_glyph_t note_glyph[2];
+ static double extend_factor = 0.25;
+ cairo_text_extents_t extents;
+ int num_glyphs = 0;
+
+ void _draw_ledger_line (double line, double offset, double width) {
+ cairo_move_to (cr, offset - extend_factor * width / 2.0,
+ score->space_height * line + score->line_width / 2.0);
+ cairo_rel_line_to (cr, (1 + extend_factor) * width, 0);
+ cairo_stroke (cr);
+ }
+
+ cairo_save (cr);
+
+ /* Move right so that X==0 is natural position for non-displaced
+ * noteheads.
+ */
+ cairo_translate (cr, score->space_height, 0);
+
+ /* Which line should the note appear on? Line 0 is the top line of
+ * the staff and increasing downwards. (Negative values indicate a
+ * note on a ledger line above the staff). Values half way between
+ * integers indicate notes appearing on a space between two staff
+ * lines (or ledger lines). */
+ line = _score_staff_pitch_to_line (staff, note->pitch);
+
+ cairo_select_font_face (cr, "Gonville-26", 0, 0);
+ cairo_set_font_size (cr, score->staff_height);
+
+ /* XXX: The hard-coded glyph indices here are very ugly. We should
+ * figure out how to lookup glyphs by name from this font. */
+ switch (PITCH_ACCIDENTAL (note->pitch)) {
+ case PITCH_ACCIDENTAL_DOUBLE_FLAT:
+ note_glyph[num_glyphs].index = 77;
+ break;
+ case PITCH_ACCIDENTAL_FLAT:
+ note_glyph[num_glyphs].index = 68;
+ break;
+ case PITCH_ACCIDENTAL_NATURAL:
+ note_glyph[num_glyphs].index = 101;
+ break;
+ case PITCH_ACCIDENTAL_SHARP:
+ note_glyph[num_glyphs].index = 134;
+ break;
+ case PITCH_ACCIDENTAL_DOUBLE_SHARP:
+ note_glyph[num_glyphs].index = 142;
+ break;
+ }
+
+ if (note->duration == 0 ||
+ ! scherzo_key_contains_pitch (&score->key, note->pitch))
+ {
+ note_glyph[num_glyphs].x = 0;
+
+ note_glyph[num_glyphs].y = score->space_height * line;
+
+ num_glyphs++;
+
+ cairo_glyph_extents (cr, note_glyph, num_glyphs, &extents);
+
+#define ACCIDENTAL_NOTE_SPACING (score->space_height * .15)
+
+ note_glyph[0].x = - (extents.width + ACCIDENTAL_NOTE_SPACING);
+ }
+
+ /* Support duration == 0 to draw accidental only */
+ if (note->duration)
+ {
+ switch (note->duration) {
+ case SCORE_DURATION_1:
+ note_glyph[num_glyphs].index = 127;
+ break;
+ case SCORE_DURATION_2:
+ note_glyph[num_glyphs].index = 85;
+ break;
+ case SCORE_DURATION_4:
+ case SCORE_DURATION_8:
+ case SCORE_DURATION_16:
+ case SCORE_DURATION_32:
+ case SCORE_DURATION_64:
+ case SCORE_DURATION_128:
+ default:
+ note_glyph[num_glyphs].index = 84;
+ }
+
+ note_glyph[num_glyphs].x = 0;
+ note_glyph[num_glyphs].y = score->space_height * line;
+
+ num_glyphs++;
+ }
+
+ cairo_glyph_extents (cr, note_glyph, num_glyphs, &extents);
+
+ if (line < 0 || line > 4) {
+ double offset, width;
+ int i;
+
+ offset = note_glyph[0].x + extents.x_bearing;
+ width = extents.width;
+
+ if (line < 0) {
+ for (i = -1; i >= line; i--)
+ _draw_ledger_line (i, offset, width);
+ } else {
+ for (i = 5; i <= line; i++)
+ _draw_ledger_line (i, offset, width);
+ }
+ }
+
+ cairo_set_source_rgb (cr,
+ note->color.r,
+ note->color.g,
+ note->color.b);
+ cairo_show_glyphs (cr, note_glyph, num_glyphs);
+
+ cairo_restore (cr);
+
+ return extents.width;
+}
+
+/* Draw the accidental from 'pitch' only (no notehead) at the correct
+ * position as if drawing a note at 'pitch'.
+ *
+ * Returns the width of the drawn glyph.
+ */
+static double
+_draw_accidental (score_t *score,
+ cairo_t *cr,
+ score_staff_t *staff,
+ pitch_t pitch)
+{
+ score_note_t note;
+
+ note.staff = staff;
+ note.pitch = pitch;
+
+ /* A duration of 0 indicates to draw only the accidental. */
+ note.duration = 0;
+
+ note.color.r = 0.0;
+ note.color.g = 0.0;
+ note.color.b = 0.0;
+
+ return _draw_note (score, cr, staff, ¬e);
+}
+
+static void
+_draw_key_signature (score_t *score, cairo_t *cr,
+ score_staff_t *staff)
+{
+ pitch_t pitch;
+ double width;