Add initial piano roll prototype

1 files changed, 123 insertions, 5 deletions

diff --git a/src/sequencer.c b/src/sequencer.c
index 3e34d68..205cb73 100644
--- a/src/sequencer.c
+++ b/src/sequencer.c
@@ -301,9 +301,9 @@ static ChannelWave ch3 = {
 
 #define TRIG_W 15
 #define TRIG_H 24
-#define TRIG_START_X 66
+#define TRIG_START_X 64
 #define TRIG_START_Y 90
-#define TRIG_OFFSET_X (TRIG_W + 4)
+#define TRIG_OFFSET_X (TRIG_W + 3)
 #define TRIG_OFFSET_Y (TRIG_H + 7)
 
 void
@@ -402,9 +402,9 @@ draw_channels(void) {
         }
         u8 clr = active ? COL_FG : COL_GREY;
         size_t y = CHAN_START_Y + i * CHAN_OFFSET_Y;
-        draw_tile(CHAN_START_X, y, channel_tiles + k++, clr, false);
-        draw_tile(CHAN_START_X + 8, y, channel_tiles + k++, clr, false);
-        draw_tile(CHAN_START_X + 16, y, channel_tiles + k++, clr, false);
+        draw_tile(CHAN_START_X, y, channel_tiles + k++, clr, true);
+        draw_tile(CHAN_START_X + 8, y, channel_tiles + k++, clr, true);
+        draw_tile(CHAN_START_X + 16, y, channel_tiles + k++, clr, true);
     }
 }
 
@@ -418,6 +418,123 @@ draw_channel_cursor(size_t i, u8 clr) {
     draw_line(x0, y, x1, y, clr);
 }
 
+#define PIANO_W 170
+#define PIANO_H 20
+#define PIANO_START_X 35
+#define PIANO_START_Y 65
+#define PIANO_NOTE_W 2
+
+void
+draw_note(u8 note, u8 clr) {
+    size_t octave = note / 12;
+    size_t value = note % 12;
+
+    size_t x0;
+    size_t y0;
+    size_t x1;
+    size_t y1;
+    switch (value) {
+        // White notes.
+        case 0:{
+            x0 = PIANO_START_X + 2 + octave * 28;
+            x1 = x0 + 1;
+            y0 = PIANO_START_Y + 2;
+            y1 = PIANO_START_Y - 2 + PIANO_H;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+            x0 = PIANO_START_X + 2 + octave * 28 + 2;
+            x1 = x0;
+            y0 = y0 + 9;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+        } break;
+        case 2:{
+            x0 = PIANO_START_X + 2 + octave * 28 + 5;
+            x1 = x0;
+            y0 = PIANO_START_Y + 2;
+            y1 = PIANO_START_Y - 2 + 12;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+            x0 = PIANO_START_X + 2 + octave * 28 + 4;
+            x1 = x0 + 2;
+            y0 = PIANO_START_Y - 2 + 13;
+            y1 = y0 + 7;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+        } break;
+        case 4:{
+            x0 = PIANO_START_X + 2 + octave * 28 + 9;
+            x1 = x0 + 1;
+            y0 = PIANO_START_Y + 2;
+            y1 = PIANO_START_Y - 2 + 12;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+            x0 = PIANO_START_X + 2 + octave * 28 + 8;
+            x1 = x0 + 2;
+            y0 = PIANO_START_Y - 2 + 13;
+            y1 = y0 + 7;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+        } break;
+        case 5:{
+            x0 = PIANO_START_X + 2 + octave * 28 + 12;
+            x1 = x0 + 1;
+            y0 = PIANO_START_Y + 2;
+            y1 = PIANO_START_Y - 2 + PIANO_H;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+            x0 = PIANO_START_X + 2 + octave * 28 + 14;
+            x1 = x0;
+            y0 = y0 + 9;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+        } break;
+        case 7:{
+            x0 = PIANO_START_X + 2 + octave * 28 + 17;
+            x1 = x0;
+            y0 = PIANO_START_Y + 2;
+            y1 = PIANO_START_Y - 2 + 12;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+            x0 = PIANO_START_X + 2 + octave * 28 + 16;
+            x1 = x0 + 2;
+            y0 = PIANO_START_Y - 2 + 13;
+            y1 = y0 + 7;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+        } break;
+        case 9:{
+            x0 = PIANO_START_X + 2 + octave * 28 + 21;
+            x1 = x0;
+            y0 = PIANO_START_Y + 2;
+            y1 = PIANO_START_Y - 2 + 12;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+            x0 = PIANO_START_X + 2 + octave * 28 + 20;
+            x1 = x0 + 2;
+            y0 = PIANO_START_Y - 2 + 13;
+            y1 = y0 + 7;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+        } break;
+        case 11: {
+            x0 = PIANO_START_X + 2 + octave * 28 + 25;
+            x1 = x0 + 1;
+            y0 = PIANO_START_Y + 2;
+            y1 = PIANO_START_Y - 2 + 12;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+            x0 = PIANO_START_X + 2 + octave * 28 + 24;
+            x1 = x0 + 2;
+            y0 = PIANO_START_Y - 2 + 13;
+            y1 = y0 + 7;
+            draw_filled_rect(x0, y0, x1, y1, clr);
+        } break;
+        default:
+            // TODO:
+            return;
+    }
+}
+
+void
+draw_piano(void) {
+    size_t x0 = PIANO_START_X;
+    size_t x1 = PIANO_START_X + PIANO_W;
+    size_t y0 = PIANO_START_Y;
+    size_t y1 = PIANO_START_Y + PIANO_H;
+    draw_rect(x0, y0, x1, y1, COL_FG);
+    for (size_t i = 0; i < 12 * 6; i++) {
+        draw_note(i, COL_FG);
+    }
+}
+
 void
 irq_timer(void) {
     if (ch1.active) {
@@ -963,6 +1080,7 @@ sequencer_init(void) {
     // Initialize background objects and sprites.
     draw_triggers();
     draw_channels();
+    draw_piano();
 
     // Initialize input handler.
     channel_selection_loc = 2; // DEBUG: Starting on CH3