#include "score.h"
+struct score_staff
+{
+ score_clef_t clef;
+
+ score_note_t **notes;
+ int num_notes;
+};
+
+typedef struct score_brace
+{
+ int first_staff;
+ int num_staves;
+} score_brace_t;
+
struct score
{
/* Height of a single staff */
/* Height of one space within a staff */
int space_height;
+ /* Minimal line width for staff lines */
+ int line_width;
+
/* Full width of staff */
int width;
+
+ score_brace_t **braces;
+ int num_braces;
+ int brace_width;
+
+ score_staff_t **staves;
+ int num_staves;
};
-void
-score_init (score_t *score)
+typedef struct score_note
{
+ score_pitch_t pitch;
+ int octave;
+ score_duration_t duration;
+} score_note_t;
+
+score_t *
+score_create (void *ctx)
+{
+ score_t *score;
+
+ score = talloc (ctx, score_t);
+ if (score == NULL)
+ return NULL;
+
+ /* Also sets space_height and line_width */
score_set_staff_height (score, 24);
+
+ /* Just to have some nominal width. */
+ score->width = 800;
+
+ score->braces = NULL;
+ score->num_braces = 0;
+
+ score->staves = NULL;
+ score->num_staves = 0;
+
+ return score;
}
int
{
score->space_height = (int) height / 4;
score->staff_height = score->space_height * 4;
+
+ score->line_width = score->space_height / 10;
+ if (score->line_width == 0)
+ score->line_width = 1;
+
return score->staff_height;
}
score->width = width;
}
+/* 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;
+
+ cairo_save (cr);
+
+ 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 = score->staff_height * (brace->first_staff + (2 * brace->num_staves - 1) / 2.0) + 1;
+
+ /* 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_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;
+ }
+}
+
+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)
+_draw_staff (score_t *score, cairo_t *cr,
+ score_staff_t *staff, int staff_width)
{
int i;
+ cairo_glyph_t clef_glyph;
+ cairo_text_extents_t clef_extents;
cairo_save (cr);
- cairo_rectangle (cr,
- 0.5, 0.5,
- score->width - 1.0, score->space_height * 4);
-
- for (i = 1; i < 4; i++) {
- cairo_move_to (cr, 0, i * score->space_height + 0.5);
- cairo_rel_line_to (cr, score->width, 0);
+ 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 (staff->clef) {
+ case SCORE_CLEF_G:
+ default:
+ clef_glyph.index = 46;
+ clef_glyph.y = 3 * score->space_height;
+ break;
+ case SCORE_CLEF_F:
+ clef_glyph.index = 45;
+ clef_glyph.y = 1 * score->space_height;
+ break;
}
+ clef_glyph.x = 3 * score->line_width;
+ clef_glyph.y += 1;
- cairo_set_line_width (cr, 1.0);
+ cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
+ cairo_show_glyphs (cr, &clef_glyph, 1);
+
+ 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_line_width (cr, score->line_width);
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);
}
-static void
-_draw_grand_staff (score_t *score, cairo_t *cr)
+void
+score_draw (score_t *score, cairo_t *cr)
{
+ int i;
+ int staff_width = score->width;
+
cairo_save (cr);
+ if (score->num_braces)
+ {
+ int brace_width;
+
+ for (i = 0; i < score->num_braces; i++)
+ _draw_brace (score, cr, score->braces[i], &brace_width);
+
+ /* Subtract space for brace itself */
+ cairo_translate (cr, brace_width, 0);
+ staff_width -= brace_width;
+
+ /* As well as some padding */
+ cairo_translate (cr, 2, 0);
+ staff_width -= 2;
+ }
+
/* Vertical lines at each end */
cairo_rectangle (cr,
- 0.5, 0.5,
- score->width - 1.0,
+ score->line_width / 2.0,
+ score->line_width / 2.0,
+ staff_width - score->line_width,
score->staff_height * 3);
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
- cairo_set_line_width (cr, 1.0);
+ cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
+ cairo_set_line_width (cr, score->line_width);
cairo_stroke (cr);
- /* Top staff */
- _draw_staff (score, cr);
-
- /* Bottom staff */
- cairo_translate (cr, 0, score->staff_height * 2);
- _draw_staff (score, 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);
+ }
cairo_restore (cr);
}
void
-score_draw (score_t *score, cairo_t *cr)
+score_add_brace (score_t *score, int staves)
{
- _draw_grand_staff (score, cr);
+ score_brace_t *brace;
+
+ brace = talloc (score, score_brace_t);
+ if (brace == NULL)
+ return;
+
+ brace->first_staff = score->num_staves;
+ brace->num_staves = staves;
+
+ score->num_braces++;
+ score->braces = talloc_realloc (score,
+ score->braces,
+ score_brace_t*,
+ score->num_braces);
+ if (score->braces == NULL) {
+ score->num_braces = 0;
+ return;
+ }
+
+ score->braces[score->num_braces - 1] = brace;
+
}
+
+score_staff_t *
+score_add_staff (score_t *score, score_clef_t clef)
+{
+ score_staff_t *staff;
+
+ staff = talloc (score, score_staff_t);
+ if (staff == NULL)
+ return NULL;
+
+ staff->clef = clef;
+
+ staff->notes = NULL;
+ staff->num_notes = 0;
+
+ score->num_staves++;
+ score->staves = talloc_realloc (score,
+ score->staves,
+ score_staff_t*,
+ score->num_staves);
+ if (score->staves == NULL) {
+ score->num_staves = 0;
+ return NULL;
+ }
+
+ score->staves[score->num_staves - 1] = staff;
+
+ return staff;
+}
+
+score_note_t *
+score_staff_add_note (score_staff_t *staff,
+ score_pitch_t pitch,
+ int octave,
+ score_duration_t duration)
+{
+ score_note_t *note;
+
+ note = talloc (staff, score_note_t);
+ if (note == NULL)
+ return NULL;
+
+ note->pitch = pitch;
+ note->octave = octave;
+ note->duration = duration;
+
+ staff->num_notes++;
+ staff->notes = talloc_realloc (staff,
+ staff->notes,
+ score_note_t*,
+ staff->num_notes);
+ if (staff->notes == NULL) {
+ staff->num_notes = 0;
+ return NULL;
+ }
+
+ staff->notes[staff->num_notes - 1] = note;
+
+ return note;
+}
+
projects / scherzo / blobdiff