#include <pango/pangocairo.h>
#include <string.h>
+#include <math.h>
#include "score.h"
+#define ARRAY_SIZE(arr) ((int) (sizeof(arr) / sizeof(arr[0])))
+
+typedef struct score_note
+{
+ score_staff_t *staff;
+ pitch_t pitch;
+ score_duration_t duration;
+
+ struct {
+ double r;
+ double g;
+ double b;
+ } color;
+} score_note_t;
+
struct score_staff
{
score_clef_t clef;
/* Full width of staff */
int width;
+ /* Current (diatonic) key */
+ scherzo_key_t key;
+
score_brace_t **braces;
int num_braces;
int brace_width;
/* Just to have some nominal width. */
score->width = 1000;
+ /* Default to C, of course */
+ score->key.pitch = PITCH_CLASS_LITERAL (C, NATURAL);
+ score->key.num_sharps = 0;
+ score->key.num_flats = 0;
+
score->braces = NULL;
score->num_braces = 0;
score->width = width;
}
+void
+score_set_key (score_t *score, pitch_t key)
+{
+ 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,
}
}
+/* 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_note_to_line (score_staff_t *staff, score_note_t *note)
+_score_staff_pitch_to_line (score_staff_t *staff, pitch_t pitch)
{
- score_pitch_name_t name = SCORE_PITCH_NAME (note->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 - SCORE_PITCH_NAME_C) / 2.0 - 3.5 * (note->octave - 4);
+ return c_line - (name - PITCH_NAME_C) / 2.0 - 3.5 * (octave - 4);
}
/* chord->width is updated as a side effect */
cairo_restore (cr);
}
-static void
+/* 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)
{
* 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);
+ 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 (SCORE_PITCH_ACCIDENTAL (note->pitch)) {
- case SCORE_PITCH_ACCIDENTAL_DOUBLE_FLAT:
+ switch (PITCH_ACCIDENTAL (note->pitch)) {
+ case PITCH_ACCIDENTAL_DOUBLE_FLAT:
note_glyph[num_glyphs].index = 77;
break;
- case SCORE_PITCH_ACCIDENTAL_FLAT:
+ case PITCH_ACCIDENTAL_FLAT:
note_glyph[num_glyphs].index = 68;
break;
- case SCORE_PITCH_ACCIDENTAL_NATURAL:
+ case PITCH_ACCIDENTAL_NATURAL:
note_glyph[num_glyphs].index = 101;
break;
- case SCORE_PITCH_ACCIDENTAL_SHARP:
+ case PITCH_ACCIDENTAL_SHARP:
note_glyph[num_glyphs].index = 134;
break;
- case SCORE_PITCH_ACCIDENTAL_DOUBLE_SHARP:
+ case PITCH_ACCIDENTAL_DOUBLE_SHARP:
note_glyph[num_glyphs].index = 142;
break;
}
- if (SCORE_PITCH_ACCIDENTAL (note->pitch) != SCORE_PITCH_ACCIDENTAL_NATURAL)
+ if (note->duration == 0 ||
+ ! scherzo_key_contains_pitch (&score->key, note->pitch))
{
note_glyph[num_glyphs].x = 0;
note_glyph[0].x = - (extents.width + ACCIDENTAL_NOTE_SPACING);
}
- 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;
- }
+ /* 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;
- note_glyph[num_glyphs].x = 0;
- note_glyph[num_glyphs].y = score->space_height * line;
+ num_glyphs++;
+ }
- num_glyphs++;
+ cairo_glyph_extents (cr, note_glyph, num_glyphs, &extents);
if (line < 0 || line > 4) {
double offset, width;
int i;
- cairo_glyph_extents (cr, note_glyph, num_glyphs, &extents);
offset = note_glyph[0].x + extents.x_bearing;
width = extents.width;
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;
+ int i;
+
+ /* These octave numbers are correct for treble clef. For bass
+ * clef, subtract two.
+ */
+ pitch_t sharps_order[] = {
+ PITCH_LITERAL (F, SHARP, 5),
+ PITCH_LITERAL (C, SHARP, 5),
+ PITCH_LITERAL (G, SHARP, 5),
+ PITCH_LITERAL (D, SHARP, 5),
+ PITCH_LITERAL (A, SHARP, 4),
+ PITCH_LITERAL (E, SHARP, 5),
+ PITCH_LITERAL (B, SHARP, 4)
+ };
+
+ pitch_t flats_order[] = {
+ PITCH_LITERAL (B, FLAT, 4),
+ PITCH_LITERAL (E, FLAT, 5),
+ PITCH_LITERAL (A, FLAT, 4),
+ PITCH_LITERAL (D, FLAT, 5),
+ PITCH_LITERAL (G, FLAT, 4),
+ PITCH_LITERAL (C, FLAT, 5),
+ PITCH_LITERAL (F, FLAT, 4),
+ };
+
+ for (i = 0; i < score->key.num_sharps; i++) {
+ pitch = sharps_order[i];
+
+ if (staff->clef == SCORE_CLEF_BASS)
+ pitch = pitch_lower_by_octaves (pitch, 2);
+
+ width = _draw_accidental (score, cr, staff, pitch);
+
+#define KEY_SIGNATURE_ACCIDENTAL_SPACING (score->space_height * .15)
+ cairo_translate (cr, ceil (width + KEY_SIGNATURE_ACCIDENTAL_SPACING), 0);
+ }
+
+ for (i = 0; i < score->key.num_flats; i++) {
+ pitch = flats_order[i];
+
+ if (staff->clef == SCORE_CLEF_BASS)
+ pitch = pitch_lower_by_octaves (pitch, 2);
+
+ width = _draw_accidental (score, cr, staff, pitch);
+
+ cairo_translate (cr, ceil (width + KEY_SIGNATURE_ACCIDENTAL_SPACING), 0);
+ }
}
static void
{
int i;
cairo_glyph_t clef_glyph;
+ cairo_text_extents_t clef_extents;
cairo_save (cr);
cairo_set_font_size (cr, score->staff_height);
+ /* 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_line_width (cr, score->line_width);
+
+ cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
+ cairo_stroke (cr);
+
+ /* Draw the clef */
+
/* XXX: The hard-coded glyph indices here are very ugly. We should
* figure out how to lookup glyphs by name from this font. */
switch (staff->clef) {
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
cairo_show_glyphs (cr, &clef_glyph, 1);
- /* 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);
- }
+ /* Make space for clef */
+ cairo_glyph_extents (cr, &clef_glyph, 1, &clef_extents);
- cairo_set_line_width (cr, score->line_width);
+#define CLEF_KEY_SIGNATURE_SPACING (score->space_height * .75)
+ cairo_translate (cr, ceil (clef_extents.width +
+ CLEF_KEY_SIGNATURE_SPACING), 0);
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
- cairo_stroke (cr);
+ /* Draw the key signature */
+ _draw_key_signature (score, cr, staff);
- /* Make space for clef before drawing notes */
- cairo_translate (cr, (int) (4 * score->space_height), 0);
+#define KEY_SIGNATURE_NOTE_SPACING (score->space_height)
+ cairo_translate (cr, ceil (KEY_SIGNATURE_NOTE_SPACING), 0);
/* Draw chord symbols */
cairo_save (cr);
}
void
-score_remove_chord (score_chord_t *chord)
+score_staff_remove_chords (score_staff_t *staff)
{
- score_staff_t *staff = chord->staff;
- int i;
-
- for (i = 0; i < staff->num_chords; i++)
- if (staff->chords[i] == chord)
- break;
+ talloc_free (staff->chords);
+ staff->chords = NULL;
- if (i == staff->num_chords)
- return;
+ staff->num_chords = 0;
+}
- if (i < staff->num_chords - 1)
- {
- memmove (staff->chords + i,
- staff->chords + i + 1,
- (staff->num_chords - 1 - i) * sizeof (score_chord_t *));
- }
+void
+score_remove_chords (score_t *score)
+{
+ int i;
- staff->num_chords -= 1;
+ for (i = 0; i < score->num_staves; i++)
+ score_staff_remove_chords (score->staves[i]);
}
-score_note_t *
-score_add_note (score_staff_t *staff,
- score_pitch_t pitch,
- int octave,
- score_duration_t duration)
+void
+score_staff_add_note (score_staff_t *staff,
+ pitch_t pitch,
+ score_duration_t duration)
{
score_note_t *note;
double line;
for (i = 0; i < staff->num_notes; i++) {
note = staff->notes[i];
if (note->pitch == pitch &&
- note->octave == octave &&
note->duration == duration)
{
- return note;
+ return;
}
}
note = talloc (staff, score_note_t);
if (note == NULL)
- return NULL;
+ return;
note->staff = staff;
note->pitch = pitch;
- note->octave = octave;
note->duration = duration;
note->color.r = 0.0;
note->color.g = 0.0;
note->color.b = 0.0;
- line = _score_note_to_line (staff, note);
+ line = _score_staff_pitch_to_line (staff, note->pitch);
if (line < 0) {
int lines = (int) (- line);
if (lines > staff->upper_ledger_lines)
staff->num_notes);
if (staff->notes == NULL) {
staff->num_notes = 0;
- return NULL;
+ return;
}
staff->notes[staff->num_notes - 1] = note;
-
- return note;
}
void
-score_remove_note (score_note_t *note)
+score_add_note (score_t *score, pitch_t pitch, score_duration_t duration)
{
- score_staff_t *staff = note->staff;
+ score_staff_t *staff, *nearest_staff = NULL;
+ double distance, nearest_distance = 0.0;
int i;
- for (i = 0; i < staff->num_notes; i++)
- if (staff->notes[i] == note)
- break;
-
- if (i == staff->num_notes)
+ /* Nothing to do if we have no staff, (there's no place to add a note) . */
+ if (score->num_staves == 0)
return;
- if (i < staff->num_notes - 1)
- {
- memmove (staff->notes + i,
- staff->notes + i + 1,
- (staff->num_notes - 1 - i) * sizeof (score_note_t *));
+ /* Find the staff where the note will be closest to the center of
+ * the staff. */
+ for (i = 0; i < score->num_staves; i++) {
+ staff = score->staves[i];
+ distance = fabs (_score_staff_pitch_to_line (staff, pitch) - 2.0);
+ if (nearest_staff == NULL || distance < nearest_distance) {
+ nearest_staff = staff;
+ nearest_distance = distance;
+ }
}
- staff->num_notes -= 1;
-
- if (staff->num_notes == 0) {
- staff->upper_ledger_lines = 0;
- staff->lower_ledger_lines = 0;
- }
+ score_staff_add_note (nearest_staff, pitch, duration);
}
void
-score_set_note_color_rgb (score_note_t *note,
- double r,
- double g,
- double b)
+score_staff_remove_notes (score_staff_t *staff)
{
- note->color.r = r;
- note->color.g = g;
- note->color.b = b;
+ talloc_free (staff->notes);
+ staff->notes = NULL;
+ staff->num_notes = 0;
+
+ staff->upper_ledger_lines = 0;
+ staff->lower_ledger_lines = 0;
}
-score_note_t *
-score_staff_find_note (score_staff_t *staff,
- score_pitch_t pitch,
- int octave,
- score_duration_t duration)
+void
+score_remove_notes (score_t *score)
{
int i;
- score_note_t *note;
-
- for (i = 0; i < staff->num_notes; i++) {
- note = staff->notes[i];
- if (note->pitch == pitch &&
- note->octave == octave &&
- note->duration == duration)
- {
- return note;
- }
- }
- return NULL;
+ for (i = 0; i < score->num_staves; i++)
+ score_staff_remove_notes (score->staves[i]);
}
projects / scherzo / blobdiff