#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 */
/* Full width of staff */
int width;
+
+ score_brace_t **braces;
+ int num_braces;
+ int brace_width;
+
+ score_staff_t **staves;
+ 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)
{
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;
}
score->width = width;
}
-typedef enum score_clef
+/* 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)
{
- SCORE_CLEF_G,
- SCORE_CLEF_F
-} score_clef_t;
+ 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;
+}
static void
-_draw_staff (score_t *score, cairo_t *cr, score_clef_t clef)
+_draw_staff (score_t *score, cairo_t *cr,
+ score_staff_t *staff, int staff_width)
{
int i;
cairo_glyph_t glyph;
/* XXX: The hard-coded glyph indices here are very ugly. We should
* figure out how to lookup glyphs by name from this font. */
- switch (clef) {
+ switch (staff->clef) {
case SCORE_CLEF_G:
default:
glyph.index = 46;
cairo_rectangle (cr,
score->line_width / 2.0,
score->line_width / 2.0,
- score->width - score->line_width,
+ staff_width - score->line_width,
score->space_height * 4);
for (i = 1; i < 4; i++) {
cairo_move_to (cr, 0, i * score->space_height + score->line_width / 2.0);
- cairo_rel_line_to (cr, score->width, 0);
+ cairo_rel_line_to (cr, staff_width, 0);
}
cairo_set_line_width (cr, score->line_width);
cairo_restore (cr);
}
-static void
-_draw_grand_staff (score_t *score, cairo_t *cr)
+void
+score_draw (score_t *score, cairo_t *cr)
{
-#define BRACE_GLYPHS 1
- cairo_glyph_t brace;
- cairo_text_extents_t brace_extents;
- cairo_save (cr);
-
- /* Brace test */
- 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.index = 300;
- brace.x = 0;
- brace.y = (score->staff_height * 3) / 2 + 1;
+ int i;
+ int staff_width = score->width;
- /* 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_save (cr);
- cairo_glyph_extents (cr, &brace, 1, &brace_extents);
+ if (score->num_braces)
+ {
+ int brace_width;
- cairo_translate (cr, -brace_extents.x_bearing, 0);
- score->width += brace_extents.x_bearing;
+ for (i = 0; i < score->num_braces; i++)
+ _draw_brace (score, cr, score->braces[i], &brace_width);
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
- cairo_show_glyphs (cr, &brace, 1);
+ /* Subtract space for brace itself */
+ cairo_translate (cr, brace_width, 0);
+ staff_width -= brace_width;
- cairo_translate (cr, 2, 0);
- score->width -= 2;
+ /* As well as some padding */
+ cairo_translate (cr, 2, 0);
+ staff_width -= 2;
+ }
/* Vertical lines at each end */
cairo_rectangle (cr,
score->line_width / 2.0,
score->line_width / 2.0,
- score->width - score->line_width,
+ staff_width - score->line_width,
score->staff_height * 3);
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, SCORE_CLEF_G);
-
- /* Bottom staff */
- cairo_translate (cr, 0, score->staff_height * 2);
- _draw_staff (score, cr, SCORE_CLEF_F);
+ 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;
+}
+
#include <cairo.h>
typedef struct score score_t;
+typedef struct score_staff score_staff_t;
+typedef struct score_note score_note_t;
+
+typedef enum score_pitch
+{
+ SCORE_PITCH_Aff,
+ SCORE_PITCH_Af,
+ SCORE_PITCH_A,
+ SCORE_PITCH_As,
+ SCORE_PITCH_Ass,
+
+ SCORE_PITCH_Bff,
+ SCORE_PITCH_Bf,
+ SCORE_PITCH_B,
+ SCORE_PITCH_Bs,
+ SCORE_PITCH_Bss,
+
+ SCORE_PITCH_Cff,
+ SCORE_PITCH_Cf,
+ SCORE_PITCH_C,
+ SCORE_PITCH_Cs,
+ SCORE_PITCH_Css,
+
+ SCORE_PITCH_Dff,
+ SCORE_PITCH_Df,
+ SCORE_PITCH_D,
+ SCORE_PITCH_Ds,
+ SCORE_PITCH_Dss,
+
+ SCORE_PITCH_Eff,
+ SCORE_PITCH_Ef,
+ SCORE_PITCH_E,
+ SCORE_PITCH_Es,
+ SCORE_PITCH_Ess,
+
+ SCORE_PITCH_Fff,
+ SCORE_PITCH_Ff,
+ SCORE_PITCH_F,
+ SCORE_PITCH_Fs,
+ SCORE_PITCH_Fss,
+
+ SCORE_PITCH_Gff,
+ SCORE_PITCH_Gf,
+ SCORE_PITCH_G,
+ SCORE_PITCH_Gs,
+ SCORE_PITCH_Gss
+} score_pitch_t;
+
+typedef enum score_duration
+{
+ SCORE_DURATION_WHOLE = 1,
+ SCORE_DURATION_1 = 1,
+ SCORE_DURATION_HALF = 2,
+ SCORE_DURATION_2 = 2,
+ SCORE_DURATION_QUARTER = 4,
+ SCORE_DURATION_4 = 4,
+ SCORE_DURATION_EIGHTH = 8,
+ SCORE_DURATION_8 = 8,
+ SCORE_DURATION_SIXTEENTH = 16,
+ SCORE_DURATION_16 = 16,
+ SCORE_DURATION_THIRTYSECOND = 32,
+ SCORE_DURATION_32 = 32,
+ SCORE_DURATION_SIXTYFOURTH = 64,
+ SCORE_DURATION_64 = 64,
+ SCORE_DURATION_ONEHUNDREDTWENTYEIGHTH = 128,
+ SCORE_DURATION_128 = 128
+} score_duration_t;
+
+#define SCORE_BUILD_NOTE(pitch, octave, duration) SCORE_PITCH_##pitch, (octave), SCORE_DURATION_##duration
+
+typedef enum score_clef
+{
+ SCORE_CLEF_G,
+ SCORE_CLEF_F
+} score_clef_t;
/* Allocate a new, empty score object, (with optional ctx as talloc
* owner). If ctx is NULL, the caller should call talloc_free on the
void
score_set_width (score_t *score, int width);
+/* Add a brace to the score, connecting the given number of staves.
+ *
+ * The staves to be connected are those that will next be added to the
+ * score. */
+void
+score_add_brace (score_t *score, int staves);
+
+/* Add a new staff to the score */
+score_staff_t *
+score_add_staff (score_t *score, score_clef_t clef);
+
+/* Add a note to a staff of the given pitch, octave, and duration.
+ *
+ * Octave numbers are ISO octave numbers [0:8], (so Octave 4 is from
+ * middle C to the B above middle C).
+ *
+ * Duration values can be symbolic (SCORE_DURATION_WHOLE, _QUARTER,
+ * _EIGHTH, etc.) or numerical as simply the denominator (WHOLE=1,
+ * QUARTER=4, EIGHTH=8, etc.)
+ */
+score_note_t *
+score_staff_add_note (score_staff_t *staff,
+ score_pitch_t pitch,
+ int octave,
+ score_duration_t);
+
/* Draw the given score_t onto the given cairo_t.
*
* The caller can call cairo_translate before calling score_draw to
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