X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=score.h;h=25d558329eb4c05923b924119daac08e8b8041e1;hb=f15abc24d2c9a574d1209922a0d9825df21245f8;hp=26b976683cadb23bcfc47870fe7abe7022a00626;hpb=66812a216aa78f33ddff8753dd62f8450ef3220a;p=scherzo

diff --git a/score.h b/score.h
index 26b9766..25d5583 100644
--- a/score.h
+++ b/score.h
@@ -21,20 +21,134 @@
 #ifndef SCORE_H
 #define SCORE_H
 
+#include <talloc.h>
 #include <cairo.h>
 
-typedef struct score
+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
 {
-    /* Height of each space on staff. */
-    int space_height;
+    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
+ * score_t* when done with it. Otherwise, the object will be freed
+ * when ctx is freed. */
+score_t *
+score_create (void *ctx);
+
+/* Set an (approximate) staff height. The actual staff height may
+ * differ due to rounding to achieve evenly spaced, sharply rendered
+ * lines. the actual staff height is returned. */
+int
+score_set_staff_height (score_t *score, int height);
 
-    /* Total width available to score. */
-    int width;
-} score_t;
+/* Set the total width available for drawing the score. */
+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_init (score_t *score);
+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
+ * position the result as desired, (and can call cairo_clip to clip it
+ * if desired). */
 void
 score_draw (score_t *score, cairo_t *cr);