*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;
+ }
+}
+
+static double
+_score_note_to_line (score_staff_t *staff, score_note_t *note)
+{
+ score_pitch_name_t name = SCORE_PITCH_NAME (note->pitch);
+ int c_line = _score_clef_c_line (staff->clef);
+
+ return c_line - (name - SCORE_PITCH_NAME_C) / 2.0 - 3.5 * (note->octave - 4);
+}
+
+static void
+_draw_note (score_t *score, cairo_t *cr,
+ score_staff_t *staff, score_note_t *note)
+{
+ double line;
+ cairo_glyph_t note_glyph;
+
+ cairo_save (cr);
+
+ /* 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_note_to_line (staff, note);
+
+ 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 (note->duration) {
+ case SCORE_DURATION_1:
+ note_glyph.index = 127;
+ break;
+ case SCORE_DURATION_2:
+ note_glyph.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.index = 84;
+ }
+
+ note_glyph.x = 0;
+ note_glyph.y = score->space_height * line + score->line_width / 2.0;
+
+ cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
+ cairo_show_glyphs (cr, ¬e_glyph, 1);
+
+ cairo_restore (cr);
+}
+
static void
_draw_staff (score_t *score, cairo_t *cr,
score_staff_t *staff, int staff_width)
{
int i;
- cairo_glyph_t glyph;
+ cairo_glyph_t clef_glyph;
+ cairo_text_extents_t clef_extents;
cairo_save (cr);
switch (staff->clef) {
case SCORE_CLEF_G:
default:
- glyph.index = 46;
- glyph.y = 3 * score->space_height;
+ clef_glyph.index = 46;
+ clef_glyph.y = 3 * score->space_height;
break;
case SCORE_CLEF_F:
- glyph.index = 45;
- glyph.y = 1 * score->space_height;
+ clef_glyph.index = 45;
+ clef_glyph.y = 1 * score->space_height;
break;
}
- glyph.x = 3 * score->line_width;
- glyph.y += 1;
+ clef_glyph.x = 3 * score->line_width;
+ clef_glyph.y += 1;
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
- cairo_show_glyphs (cr, &glyph, 1);
+ cairo_show_glyphs (cr, &clef_glyph, 1);
- cairo_rectangle (cr,
- score->line_width / 2.0,
- score->line_width / 2.0,
- staff_width - score->line_width,
- score->space_height * 4);
-
- for (i = 1; i < 4; i++) {
+ cairo_glyph_extents (cr, &clef_glyph, 1, &clef_extents);
+
+ /* Draw staff lines */
+ for (i = 0; i < 5; i++) {
cairo_move_to (cr, 0, i * score->space_height + score->line_width / 2.0);
cairo_rel_line_to (cr, staff_width, 0);
}
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
cairo_stroke (cr);
+ /* Make space for clef before drawing notes */
+ cairo_translate (cr, (int) (1.5 * clef_extents.width), 0);
+
+ /* Draw notes */
+ for (i = 0; i < staff->num_notes; i++) {
+ _draw_note (score, cr, staff, staff->notes[i]);
+ cairo_translate (cr, score->space_height * 2.0, 0);
+ }
+
cairo_restore (cr);
}