From 997636705c1b736ae8355bf67d9b2336ef17e43c Mon Sep 17 00:00:00 2001 From: Carl Worth Date: Mon, 26 Sep 2011 20:57:42 -0700 Subject: [PATCH] Draw ledger lines. It's almost getting to be a usable program now. --- score.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/score.c b/score.c index 0c9d5f3..0228b6e 100644 --- a/score.c +++ b/score.c @@ -170,6 +170,15 @@ _draw_note (score_t *score, cairo_t *cr, { double line; cairo_glyph_t note_glyph; + static double extend_factor = 0.25; + + void _draw_ledger_line (double line, double width) { + cairo_move_to (cr, + - width * extend_factor / 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); @@ -203,7 +212,22 @@ _draw_note (score_t *score, cairo_t *cr, } note_glyph.x = 0; - note_glyph.y = score->space_height * line + score->line_width / 2.0; + note_glyph.y = score->space_height * line; + + if (line < 0 || line > 4) { + int i; + cairo_text_extents_t note_extents; + + cairo_glyph_extents (cr, ¬e_glyph, 1, ¬e_extents); + + if (line < 0) { + for (i = -1; i >= line; i--) + _draw_ledger_line (i, note_extents.width); + } else { + for (i = 5; i <= line; i++) + _draw_ledger_line (i, note_extents.width); + } + } cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */ cairo_show_glyphs (cr, ¬e_glyph, 1); -- 2.43.0