* along with this program. If not, see http://www.gnu.org/licenses/ .
*/
+#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;
+ score_chord_t **chords;
+ int num_chords;
+
score_note_t **notes;
int num_notes;
+
+ /* How many ledger lines are needed for current notes */
+ int upper_ledger_lines;
+ int lower_ledger_lines;
+
+ /* Y position of top full line of staff */
+ int y_pos;
};
typedef struct score_brace
struct score
{
- /* Height of a single staff */
+ /* Nominal height of a single staff (ledger lines may make it larger) */
int staff_height;
/* Height of one space within a staff */
/* Full width of staff */
int width;
+ /* Current (diatonic) key */
+ scherzo_key_t key;
+
score_brace_t **braces;
int num_braces;
int brace_width;
int num_staves;
};
-typedef struct score_note
-{
- score_pitch_t pitch;
- int octave;
- score_duration_t duration;
-} score_note_t;
-
score_t *
score_create (void *ctx)
{
return NULL;
/* Also sets space_height and line_width */
- score_set_staff_height (score, 24);
+ score_set_staff_height (score, 76);
/* Just to have some nominal width. */
- score->width = 800;
+ 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,
{
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
* than just the bare index here). */
brace_glyph.index = 300;
brace_glyph.x = 0;
- brace_glyph.y = score->staff_height * (brace->first_staff + (2 * brace->num_staves - 1) / 2.0) + 1;
+ 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, (score->staff_height * 3) / 3.85);
+ cairo_set_font_size (cr, (bottom - top) / 3.85);
cairo_glyph_extents (cr, &brace_glyph, 1, &brace_extents);
}
}
+/* 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 */
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;
+ 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_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 (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;
+ 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;
}
- note_glyph.x = 0;
- note_glyph.y = score->space_height * line + score->line_width / 2.0;
+ 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;
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
- cairo_show_glyphs (cr, ¬e_glyph, 1);
+ 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;
+ 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
cairo_save (cr);
+ cairo_translate (cr, 0, staff->y_pos);
+
cairo_select_font_face (cr, "Gonville-26", 0, 0);
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) {
break;
}
clef_glyph.x = 3 * score->line_width;
- clef_glyph.y += 1;
+ clef_glyph.y += score->line_width / 2.0;
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
cairo_show_glyphs (cr, &clef_glyph, 1);
+ /* Make space for clef */
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);
- }
+#define CLEF_KEY_SIGNATURE_SPACING (score->space_height * .75)
+ cairo_translate (cr, ceil (clef_extents.width +
+ CLEF_KEY_SIGNATURE_SPACING), 0);
- cairo_set_line_width (cr, score->line_width);
+ /* Draw the key signature */
+ _draw_key_signature (score, cr, staff);
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
- cairo_stroke (cr);
+#define KEY_SIGNATURE_NOTE_SPACING (score->space_height)
+ cairo_translate (cr, ceil (KEY_SIGNATURE_NOTE_SPACING), 0);
- /* Make space for clef before drawing notes */
- cairo_translate (cr, (int) (1.5 * clef_extents.width), 0);
+ /* Draw chord symbols */
+ cairo_save (cr);
+ {
+ for (i = 0; i < staff->num_chords; i++) {
+ _draw_chord (score, cr, staff, staff->chords[i]);
+ cairo_translate (cr, staff->chords[i]->width, 0.0);
+ }
+ }
+ cairo_restore (cr);
/* Draw notes */
for (i = 0; i < staff->num_notes; i++) {
_draw_note (score, cr, staff, staff->notes[i]);
+ /* Draw all notes concurrent for now (as a chord)
cairo_translate (cr, score->space_height * 2.0, 0);
+ */
}
cairo_restore (cr);
{
int i;
int staff_width = score->width;
+ int staff_y_pos;
+
+ if (score->num_staves == 0)
+ return;
cairo_save (cr);
+ /* Before drawing anything, position each staff based on the size
+ * of each (including ledger lines) */
+ staff_y_pos = 0;
+ for (i = 0; i < score->num_staves; i++) {
+ score_staff_t *staff = score->staves[i];
+ staff_y_pos += staff->upper_ledger_lines * score->space_height;
+ staff->y_pos = staff_y_pos;
+ staff_y_pos += (score->staff_height +
+ staff->lower_ledger_lines * score->space_height +
+ score->staff_height);
+ }
+
if (score->num_braces)
{
- int brace_width;
+ /* Initialize to keep the compiler quiet. */
+ int brace_width = 0;
for (i = 0; i < score->num_braces; i++)
_draw_brace (score, cr, score->braces[i], &brace_width);
/* Vertical lines at each end */
cairo_rectangle (cr,
score->line_width / 2.0,
- score->line_width / 2.0,
+ score->staves[0]->y_pos + score->line_width / 2.0,
staff_width - score->line_width,
- score->staff_height * 3);
+ score->staves[score->num_staves-1]->y_pos + score->staff_height - score->staves[0]->y_pos);
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
cairo_set_line_width (cr, score->line_width);
cairo_stroke (cr);
for (i = 0; i < score->num_staves; i++) {
- _draw_staff (score, cr, score->staves[i], staff_width);
- cairo_translate (cr, 0, 2 * score->staff_height);
+ score_staff_t *staff = score->staves[i];
+ _draw_staff (score, cr, staff, staff_width);
}
cairo_restore (cr);
staff->notes = NULL;
staff->num_notes = 0;
+ staff->chords = NULL;
+ staff->num_chords = 0;
+
+ staff->upper_ledger_lines = 0;
+ staff->lower_ledger_lines = 0;
+
score->num_staves++;
score->staves = talloc_realloc (score,
score->staves,
return staff;
}
-score_note_t *
+score_chord_t *
+score_add_chord (score_staff_t *staff,
+ const char *name)
+{
+ score_chord_t *chord;
+
+ chord = talloc (staff, score_chord_t);
+ if (chord == NULL)
+ return NULL;
+
+ talloc_steal (chord, name);
+
+ chord->staff = staff;
+ chord->name = talloc_strdup (chord, name);
+
+ /* The width will get set correctly the first time _draw_chord is
+ * called. */
+ chord->width = 0.0;
+
+ staff->num_chords++;
+ staff->chords = talloc_realloc (staff,
+ staff->chords,
+ score_chord_t*,
+ staff->num_chords);
+ if (staff->chords == NULL) {
+ staff->num_chords = 0;
+ return NULL;
+ }
+
+ staff->chords[staff->num_chords - 1] = chord;
+
+ return chord;
+}
+
+void
+score_staff_remove_chords (score_staff_t *staff)
+{
+ talloc_free (staff->chords);
+ staff->chords = NULL;
+
+ staff->num_chords = 0;
+}
+
+void
+score_remove_chords (score_t *score)
+{
+ int i;
+
+ for (i = 0; i < score->num_staves; i++)
+ score_staff_remove_chords (score->staves[i]);
+}
+
+void
score_staff_add_note (score_staff_t *staff,
- score_pitch_t pitch,
- int octave,
+ pitch_t pitch,
score_duration_t duration)
{
score_note_t *note;
+ double line;
+ int i;
+
+ /* Return existing note if already present. */
+ for (i = 0; i < staff->num_notes; i++) {
+ note = staff->notes[i];
+ if (note->pitch == pitch &&
+ note->duration == duration)
+ {
+ 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_staff_pitch_to_line (staff, note->pitch);
+ if (line < 0) {
+ int lines = (int) (- line);
+ if (lines > staff->upper_ledger_lines)
+ staff->upper_ledger_lines = lines;
+ } else {
+ int lines = (int) (line - 4);
+ if (lines > staff->lower_ledger_lines)
+ staff->lower_ledger_lines = lines;
+ }
+
staff->num_notes++;
staff->notes = talloc_realloc (staff,
staff->notes,
staff->num_notes);
if (staff->notes == NULL) {
staff->num_notes = 0;
- return NULL;
+ return;
}
staff->notes[staff->num_notes - 1] = note;
+}
+
+void
+score_add_note (score_t *score, pitch_t pitch, score_duration_t duration)
+{
+ score_staff_t *staff, *nearest_staff = NULL;
+ double distance, nearest_distance = 0.0;
+ int i;
- return note;
+ /* Nothing to do if we have no staff, (there's no place to add a note) . */
+ if (score->num_staves == 0)
+ return;
+
+ /* 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;
+ }
+ }
+
+ score_staff_add_note (nearest_staff, pitch, duration);
}
+void
+score_staff_remove_notes (score_staff_t *staff)
+{
+ talloc_free (staff->notes);
+ staff->notes = NULL;
+ staff->num_notes = 0;
+
+ staff->upper_ledger_lines = 0;
+ staff->lower_ledger_lines = 0;
+}
+
+void
+score_remove_notes (score_t *score)
+{
+ int i;
+
+ for (i = 0; i < score->num_staves; i++)
+ score_staff_remove_notes (score->staves[i]);
+}
projects / scherzo / blobdiff