Momentum-Apps/view/pattern_editor.c

#include "pattern_editor.h"

#include <flizzer_tracker_icons.h>

#define PATTERN_EDITOR_Y (64 - (6 * 5) - 1)

static const char *notenames[] =
    {
        "C-",
        "C#",
        "D-",
        "D#",
        "E-",
        "F-",
        "F#",
        "G-",
        "G#",
        "A-",
        "A#",
        "B-",
};

char *notename(uint8_t note)
{
    static char buffer[4];

    if (note == MUS_NOTE_CUT)
    {
        snprintf(buffer, sizeof(buffer), "%s", "OFF");
        return buffer;
    }

    if (note == MUS_NOTE_RELEASE)
    {
        snprintf(buffer, sizeof(buffer), "   ");
        return buffer;
    }

    else
    {
        snprintf(buffer, sizeof(buffer), "%s%d", notenames[note % 12], note / 12);
    }

    return buffer;
}

static const char to_char_array[] =
    {
        '0',
        '1',
        '2',
        '3',
        '4',
        '5',
        '6',
        '7',
        '8',
        '9',
        'A',
        'B',
        'C',
        'D',
        'E',
        'F',
        'G',
        'H',
        'I',
        'J',
        'K',
        'L',
        'M',
        'N',
        'O',
        'P',
        'Q',
        'R',
        'S',
        'T',
        'U',
        'V',
        'W',
        'X',
        'Y',
        'Z',
};

char to_char(uint8_t number)
{
    return to_char_array[number];
}

void draw_pattern_view(Canvas *canvas, FlizzerTrackerApp *tracker)
{
    char command_buffer[6] = {0};
    char buffer[11] = {0};

    canvas_draw_line(canvas, 0, PATTERN_EDITOR_Y, 127, PATTERN_EDITOR_Y);

    for (int i = 1; i < SONG_MAX_CHANNELS; ++i)
    {
        for (int y = PATTERN_EDITOR_Y + 1; y < 64; y += 2)
        {
            canvas_draw_dot(canvas, i * 32 - 1, y);
        }
    }

    for (int i = 0; i < SONG_MAX_CHANNELS; ++i)
    {
        uint8_t sequence_position = tracker->tracker_engine.sequence_position;
        uint8_t current_pattern = tracker->tracker_engine.song->sequence.sequence_step[sequence_position].pattern_indices[i];
        uint8_t pattern_step = tracker->tracker_engine.pattern_position;

        uint8_t pattern_length = tracker->tracker_engine.song->pattern_length;

        TrackerSongPattern *pattern = &tracker->tracker_engine.song->pattern[current_pattern];

        for (uint8_t pos = 0; pos < 5; ++pos)
        {
            TrackerSongPatternStep *step = NULL;

            if (pattern_step - 2 + pos >= 0 && pattern_step - 2 + pos < pattern_length)
            {
                step = &pattern->step[pattern_step + pos - 2];
            }

            uint8_t string_x = i * 32;
            uint8_t string_y = PATTERN_EDITOR_Y + 6 * pos + 6 + 1;

            if (step)
            {
                uint8_t note = tracker_engine_get_note(step);
                uint8_t inst = tracker_engine_get_instrument(step);
                uint8_t vol = tracker_engine_get_volume(step);
                uint16_t command = tracker_engine_get_command(step);

                char inst_ch = to_char(inst);
                char vol_ch = to_char(vol);
                char command_ch = to_char(command >> 8);

                if (inst == MUS_NOTE_INSTRUMENT_NONE)
                {
                    inst_ch = '-';
                }

                if (vol == MUS_NOTE_VOLUME_NONE)
                {
                    vol_ch = '-';
                }

                if (command == 0)
                {
                    snprintf(command_buffer, sizeof(command_buffer), "---");
                }

                else
                {
                    snprintf(command_buffer, sizeof(command_buffer), "%c%02X", command_ch, (command & 0xff));
                }

                snprintf(buffer, sizeof(buffer), "%s%c%c%s", (note == MUS_NOTE_NONE ? "---" : notename(note)), inst_ch, vol_ch, command_buffer);

                canvas_draw_str(canvas, string_x, string_y, buffer);

                if (note == MUS_NOTE_RELEASE)
                {
                    canvas_draw_icon(canvas, string_x, string_y - 5, &I_note_release);
                }
            }
        }
    }

    if (tracker->editing && tracker->focus == EDIT_PATTERN)
    {
        uint8_t x = tracker->current_channel * 32 + tracker->patternx * 4 + (tracker->patternx > 0 ? 4 : 0) - 1;
        uint8_t y = PATTERN_EDITOR_Y + 6 * 2 + 1;

        canvas_draw_box(canvas, x, y, (tracker->patternx > 0 ? 5 : 9), 7);
    }
}

#define SEQ_SLIDER_X (4 * (4 * 2 + 1) + 2)
#define SEQ_SLIDER_Y (32)

void draw_sequence_view(Canvas *canvas, FlizzerTrackerApp *tracker)
{
    char buffer[4];

    uint8_t sequence_position = tracker->tracker_engine.sequence_position;

    for (int pos = sequence_position - 2; pos < sequence_position + 3; pos++)
    {
        if (pos >= 0 && pos < tracker->song.num_sequence_steps)
        {
            for (int i = 0; i < SONG_MAX_CHANNELS; ++i)
            {
                uint8_t current_pattern = tracker->tracker_engine.song->sequence.sequence_step[pos].pattern_indices[i];

                uint8_t x = i * (4 * 2 + 1) + 3;
                uint8_t y = (pos - (sequence_position - 2)) * 6 + 5;

                snprintf(buffer, sizeof(buffer), "%02X", current_pattern);
                canvas_draw_str(canvas, x, y, buffer);
            }
        }
    }

    // TODO: add song loop indication

    canvas_set_color(canvas, ColorBlack);

    canvas_draw_line(canvas, SEQ_SLIDER_X, 0, SEQ_SLIDER_X + 2, 0);
    canvas_draw_line(canvas, SEQ_SLIDER_X, SEQ_SLIDER_Y, SEQ_SLIDER_X + 2, SEQ_SLIDER_Y);

    canvas_draw_line(canvas, SEQ_SLIDER_X, 0, SEQ_SLIDER_X, SEQ_SLIDER_Y);
    canvas_draw_line(canvas, SEQ_SLIDER_X + 2, 0, SEQ_SLIDER_X + 2, SEQ_SLIDER_Y);

    uint8_t start_pos = sequence_position * (SEQ_SLIDER_Y - 2) / tracker->song.num_sequence_steps + 1;
    uint8_t slider_length = (SEQ_SLIDER_Y - 2) / tracker->song.num_sequence_steps + 1;

    canvas_draw_line(canvas, SEQ_SLIDER_X + 1, start_pos, SEQ_SLIDER_X + 1, (start_pos + slider_length));

    canvas_set_color(canvas, ColorXOR);

    if (tracker->editing && tracker->focus == EDIT_SEQUENCE)
    {
        uint8_t x = tracker->current_channel * (4 + 4 + 1) + (tracker->current_digit ? 4 : 0) + 2;
        uint8_t y = 11;

        canvas_draw_box(canvas, x, y, 5, 7);
    }
}

#define member_size(type, member) sizeof(((type *)0)->member)

#define SONG_HEADER_SIZE (member_size(TrackerSong, song_name) + member_size(TrackerSong, speed) + member_size(TrackerSong, rate) + member_size(TrackerSong, loop_start) + member_size(TrackerSong, loop_end) + member_size(TrackerSong, num_patterns) + member_size(TrackerSong, num_sequence_steps) + member_size(TrackerSong, num_instruments) + member_size(TrackerSong, pattern_length))

uint32_t calculate_song_size(TrackerSong *song)
{
    uint32_t song_size = SONG_HEADER_SIZE + sizeof(Instrument) * song->num_instruments + sizeof(TrackerSongPatternStep) * song->num_patterns * song->pattern_length + sizeof(TrackerSongSequenceStep) * song->num_sequence_steps;
    return song_size;
}

void draw_generic_n_digit_field(FlizzerTrackerApp *tracker, Canvas *canvas, uint8_t focus, uint8_t param, const char *text, uint8_t x, uint8_t y, uint8_t digits) // last 1-2 symbols are digits we are editing
{
    canvas_draw_str(canvas, x, y, text);

    if (tracker->focus == focus && tracker->selected_param == param && tracker->editing)
    {
        if (param != SI_SONGNAME && param != SI_INSTRUMENTNAME)
        {
            canvas_draw_box(canvas, x + strlen(text) * 4 - digits * 4 + tracker->current_digit * 4 - 1, y - 6, 5, 7);
        }

        else
        {
            canvas_draw_box(canvas, x - 1, y - 6, strlen(text) * 4 + 2, 7);
        }
    }
}

void draw_songinfo_view(Canvas *canvas, FlizzerTrackerApp *tracker)
{
    char buffer[30];

    snprintf(buffer, sizeof(buffer), "PAT.P.%02X/%02X", tracker->tracker_engine.pattern_position, tracker->song.pattern_length - 1);
    draw_generic_n_digit_field(tracker, canvas, EDIT_SONGINFO, SI_PATTERNPOS, buffer, 42, 5, 2);
    snprintf(buffer, sizeof(buffer), "SEQ.P.%02X/%02X", tracker->tracker_engine.sequence_position, tracker->song.num_sequence_steps);
    draw_generic_n_digit_field(tracker, canvas, EDIT_SONGINFO, SI_SEQUENCEPOS, buffer, 42, 11, 2);
    snprintf(buffer, sizeof(buffer), "SPD.%02X", tracker->song.speed);
    draw_generic_n_digit_field(tracker, canvas, EDIT_SONGINFO, SI_SONGSPEED, buffer, 42, 17, 2);
    snprintf(buffer, sizeof(buffer), "RATE %02X", tracker->song.rate);
    draw_generic_n_digit_field(tracker, canvas, EDIT_SONGINFO, SI_SONGRATE, buffer, 42 + 4 * 7, 17, 2);
    snprintf(buffer, sizeof(buffer), "VOL %02X", tracker->tracker_engine.master_volume);
    draw_generic_n_digit_field(tracker, canvas, EDIT_SONGINFO, SI_MASTERVOL, buffer, 42 + 4 * 7 + 4 * 8, 17, 2);

    snprintf(buffer, sizeof(buffer), "SONG:%s", tracker->song.song_name);
    draw_generic_n_digit_field(tracker, canvas, EDIT_SONGINFO, SI_SONGNAME, buffer, 42, 23, 1);
    snprintf(buffer, sizeof(buffer), "INST:%s", tracker->song.instrument[tracker->current_instrument]->name);
    draw_generic_n_digit_field(tracker, canvas, EDIT_SONGINFO, SI_INSTRUMENTNAME, buffer, 42, 29, 1);

    uint32_t song_size = calculate_song_size(&tracker->song);
    uint32_t free_bytes = memmgr_get_free_heap();
    canvas_draw_line(canvas, 128 - 4 * 10 - 2, 0, 128 - 4 * 10 - 2, 10);

    char song_size_buffer[12];
    char free_bytes_buffer[12];

    if (song_size > 999)
    {
        snprintf(song_size_buffer, sizeof(song_size_buffer), "TUNE:%.1fK", (double)song_size / (double)1024.0);
    }

    else
    {
        snprintf(song_size_buffer, sizeof(song_size_buffer), "TUNE:%ld", song_size);
    }

    if (free_bytes > 999)
    {
        snprintf(free_bytes_buffer, sizeof(song_size_buffer), "FREE:%.1fK", (double)free_bytes / (double)1024.0);
    }

    else
    {
        snprintf(free_bytes_buffer, sizeof(song_size_buffer), "FREE:%ld", free_bytes);
    }

    canvas_draw_str(canvas, 128 - 4 * 10, 5, song_size_buffer);
    canvas_draw_str(canvas, 128 - 4 * 10, 11, free_bytes_buffer);
}