git.mutantstargoat.com Git - eradicate/blob - src/introscr.c

   1 #include <stdio.h>
   2 #include "screens.h"
   3 #include "imago2.h"
   4 #include "gfx.h"
   5 #include "gfxutil.h"
   6 #include "game.h"
   7
   8 #define FADE_DUR        800
   9
  10 static void *logo;
  11 static int logo_width, logo_height;
  12 static long start_time;
  13
  14 int intro_init(void)
  15 {
  16         if(!(logo = img_load_pixels("data/msglogo.jpg", &logo_width, &logo_height, IMG_FMT_RGB24))) {
  17                 fprintf(stderr, "failed to load logo image\n");
  18                 return -1;
  19         }
  20         return 0;
  21 }
  22
  23 void intro_cleanup(void)
  24 {
  25         img_free_pixels(logo);
  26 }
  27
  28 void intro_start(void)
  29 {
  30         draw = intro_draw;
  31         key_event = intro_keyb;
  32
  33         start_time = time_msec;
  34 }
  35
  36 void intro_stop(void)
  37 {
  38 }
  39
  40 void intro_draw(void)
  41 {
  42         int i, j;
  43         long tm;
  44         uint16_t fade;
  45         unsigned char *src = logo;
  46         uint16_t *dest = fb_pixels;
  47
  48         tm = time_msec - start_time;
  49         if(tm < FADE_DUR) {
  50                 fade = tm * 256 / FADE_DUR;
  51         } else if(tm < FADE_DUR * 2) {
  52                 fade = 256;
  53         } else if(tm < FADE_DUR * 3) {
  54                 fade = 256 - (tm - 2 * FADE_DUR) * 256 / FADE_DUR;
  55         } else {
  56                 menu_start();
  57                 return;
  58         }
  59
  60         for(i=0; i<fb_height; i++) {
  61                 for(j=0; j<fb_width; j++) {
  62                         uint16_t r = (uint16_t)*src++ * fade / 256;
  63                         uint16_t g = (uint16_t)*src++ * fade / 256;
  64                         uint16_t b = (uint16_t)*src++ * fade / 256;
  65                         *dest++ = PACK_RGB16(r, g, b);
  66                 }
  67         }
  68
  69         blit_frame(fb_pixels, 1);
  70 }
  71
  72 void intro_keyb(int key, int pressed)
  73 {
  74         if(pressed) {
  75                 menu_start();
  76         }
  77 }