Start decoupling of rendering from update passes

1 files changed, 104 insertions, 0 deletions

diff --git a/src/globals.c b/src/globals.c
new file mode 100644
index 0000000..bf0c5b6
--- /dev/null
+++ b/src/globals.c
@@ -0,0 +1,104 @@
+//
+// Globals.
+//
+
+static int step_counter = 0;
+int trig_selection_loc = 0;
+int param_selection_loc = 0;
+int channel_selection_loc = 0;
+int pattern_selection_loc = 0;
+int right_col_selection_loc = 0;
+int play_status = 0;
+static int current_pattern = 0;
+static int next_pattern = 0;
+static int current_bank = 0;
+
+//
+// Color indexes.
+//
+
+#define COL_BG   0
+#define COL_FG   1
+#define COL_RED  2
+#define COL_BLUE 3
+#define COL_CYAN 4
+#define COL_GREY 5
+
+// Theme colors.
+#define COL_CURSOR           COL_BLUE
+#define COL_NOTE_PRESSED     COL_GREY
+#define COL_WAVE_A           COL_RED
+#define COL_WAVE_B           COL_CYAN
+
+#define CHAN_W 19
+#define CHAN_H 8
+#define CHAN_START_X 29
+#define CHAN_START_Y 92
+#define CHAN_OFFSET_Y 12
+
+#define TRIG_W 15
+#define TRIG_H 24
+#define TRIG_START_X 58
+#define TRIG_START_Y 92
+#define TRIG_OFFSET_X (TRIG_W + 3)
+#define TRIG_OFFSET_Y (TRIG_H + 7)
+
+#define PIANO_W 170
+#define PIANO_H 20
+#define PIANO_START_X 29
+#define PIANO_START_Y 65
+#define PIANO_NOTE_W 2
+
+#define PARAMS_W 170
+#define PARAMS_H 64
+#define PARAMS_START_X 29
+#define PARAMS_START_Y 1
+
+#define R_SIDEBAR_X ((TRIG_START_X) + (TRIG_OFFSET_X) * 8 + 4)
+#define L_SIDEBAR_X ((CHAN_START_X) - 26)
+
+#define PAT_START_X (L_SIDEBAR_X + 5)
+#define PAT_START_Y 18
+#define PAT_W 14
+#define PAT_H 12
+#define PAT_OFFSET_Y 17
+
+#define R_COL_W 24
+#define BPM_START_X (R_SIDEBAR_X)
+#define BPM_START_Y (TRIG_START_Y + TRIG_H + 9)
+#define BPM_H 22
+
+#define PLAY_START_X (R_SIDEBAR_X)
+#define PLAY_START_Y (TRIG_START_Y)
+#define STOP_START_X (R_SIDEBAR_X)
+#define STOP_START_Y (TRIG_START_Y + 14)
+#define PLAY_STOP_H (10)
+
+#define BANK_START_X (R_SIDEBAR_X + 5)
+#define BANK_START_Y (PAT_START_Y)
+
+#define SEQ_N_CHANNELS 4
+
+enum RIGHT_COL_LOC {
+    R_COL_BPM    = 0,
+    R_COL_STOP   = 1,
+    R_COL_PLAY   = 2,
+    R_COL_BANK_D = 3,
+    R_COL_BANK_C = 4,
+    R_COL_BANK_B = 5,
+    R_COL_BANK_A = 6,
+};
+
+// Input handling works using a FSM. The input handler is switched to whichever
+// function controls each section. For example, channel selection or trigger
+// selection.
+void (*input_handler)(void);
+
+void handle_trigger_selection(void);
+void handle_channel_selection(void);
+void handle_pattern_selection(void);
+void handle_param_selection_sq1(void);
+void handle_param_selection_sq2(void);
+void handle_param_selection_wave(void);
+void handle_param_selection_noise(void);
+void handle_right_col_selection(void);