Duet/src/menu.c

#include <gint/display.h>
#include <gint/keyboard.h>
#include <gint/timer.h>
#include <gint/gint.h>
#include <gint/cpu.h>

#include "duet.h"

extern bopti_image_t img_title;
extern bopti_image_t img_levels;

int main_menu(int *episode, int *level)
{
    volatile int need_frame = 1;
    int timer = timer_configure(TIMER_ANY, 33000, GINT_CALL_SET(&need_frame));
    if(timer >= 0) timer_start(timer);

    float time = 0;
    int s_episode = 0;
    int s_level = 0;
    int scroll = 0;

    *episode = 0;
    *level = 0;

    while(1) {
        while (need_frame == 0) sleep();
        need_frame = 0;

        time += 1.0 / 30;

        /* Keyboard input */

        key_event_t e;
        bool input_finished = false;

        while((e = pollevent()).type != KEYEV_NONE) {
            if(e.type == KEYEV_DOWN && e.key == KEY_MENU)
                gint_osmenu();
            if(e.type == KEYEV_DOWN && e.key == KEY_EXE) {
                *episode = s_episode;
                *level = s_level;
                input_finished = true;
                break;
            }
            if(e.type == KEYEV_DOWN && e.key == KEY_DOWN &&
                    (s_episode < episode_count
                    || s_level < episodes[s_episode].level_count)) {
                s_level++;
                if(s_level >= episodes[s_episode].level_count) {
                    s_episode++;
                    s_level = 0;
                }
            }
            if(e.type == KEYEV_DOWN && e.key == KEY_UP &&
                    (s_episode > 0 || s_level > 0)) {
                s_level--;
                if(s_level < 0) {
                    s_episode--;
                    s_level = episodes[s_episode].level_count - 1;
                }
            }
        }
        if(input_finished)
            break;

        /* Rendering */

        dclear(C_BLACK);
        dimage(330 + scroll, DHEIGHT/2 - img_title.height / 2,
            &img_title);
        render_player(265 + scroll, DHEIGHT/2, time * 0.8);

        int x = 180, y=40;
        for(int i = 0; i < episode_count; i++) {
            episode_t const *e = &episodes[i];

            duet_text_opt(x, y, C_WHITE, C_NONE, DTEXT_LEFT, DTEXT_TOP,
                e->name, -1);
            x -= 13;

            for(int j = 0; j < e->level_count; j++) {
                int rx = x - 38 * (j/4);
                int ry = y + 38 * (j%4);

                if(s_episode == i && s_level == j) {
                    drect(rx+2, ry-2, rx-32, ry+32, C_WHITE);
                }
                drect(rx, ry, rx-30, ry+30, C_RGB(10, 10, 10));
                dsubimage(rx-30, ry, &img_levels, 0, 31*j, 31, 31, DIMAGE_NONE);
            }
            x -= 35 * ((e->level_count + 3) / 4);
            x -= 18;
        }

        dupdate();
    }

    timer_stop(timer);
    return 1;
}