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_BGRA32))) {
  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 fade_image(void *dest, void *src, uint16_t fade);
  41
  42 void intro_draw(void)
  43 {
  44         long tm;
  45         uint16_t fade;
  46
  47         tm = time_msec - start_time;
  48         if(tm < FADE_DUR) {
  49                 fade = tm * 256 / FADE_DUR;
  50         } else if(tm < FADE_DUR * 2) {
  51                 fade = 256;
  52         } else if(tm < FADE_DUR * 3) {
  53                 fade = 256 - (tm - 2 * FADE_DUR) * 256 / FADE_DUR;
  54         } else {
  55                 fade = 0;
  56                 menu_start();
  57                 return;
  58         }
  59
  60 #ifdef USE_MMX
  61         fade_image(fb_pixels, logo, fade);
  62 #else
  63         {
  64                 int i, j;
  65                 uint32_t *src = logo;
  66                 uint16_t *dest = fb_pixels;
  67                 for(i=0; i<640*480; i++) {
  68                         uint32_t pix = *src++;
  69                         uint16_t r = (uint16_t)UNPACK_R32(pix) * fade / 256;
  70                         uint16_t g = (uint16_t)UNPACK_G32(pix) * fade / 256;
  71                         uint16_t b = (uint16_t)UNPACK_B32(pix) * fade / 256;
  72                         *dest++ = PACK_RGB16(r, g, b);
  73                 }
  74         }
  75 #endif
  76
  77         blit_frame(fb_pixels, 0);
  78 }
  79
  80 void intro_keyb(int key, int pressed)
  81 {
  82         if(pressed) {
  83                 menu_start();
  84         }
  85 }