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 USE_MMX
   9
  10 #define FADE_DUR        800
  11
  12 static void *logo;
  13 static int logo_width, logo_height;
  14 static long start_time;
  15
  16 int intro_init(void)
  17 {
  18         if(!(logo = img_load_pixels("data/msglogo.jpg", &logo_width, &logo_height, IMG_FMT_BGRA32))) {
  19                 fprintf(stderr, "failed to load logo image\n");
  20                 return -1;
  21         }
  22         return 0;
  23 }
  24
  25 void intro_cleanup(void)
  26 {
  27         img_free_pixels(logo);
  28 }
  29
  30 void intro_start(void)
  31 {
  32         draw = intro_draw;
  33         key_event = intro_keyb;
  34
  35         start_time = time_msec;
  36 }
  37
  38 void intro_stop(void)
  39 {
  40 }
  41
  42 void fade_image(void *dest, void *src, uint16_t fade);
  43
  44 void intro_draw(void)
  45 {
  46         long tm;
  47         uint16_t fade;
  48
  49         tm = time_msec - start_time;
  50         if(tm < FADE_DUR) {
  51                 fade = tm * 256 / FADE_DUR;
  52         } else if(tm < FADE_DUR * 2) {
  53                 fade = 256;
  54         } else if(tm < FADE_DUR * 3) {
  55                 fade = 256 - (tm - 2 * FADE_DUR) * 256 / FADE_DUR;
  56         } else {
  57                 fade = 0;
  58                 //menu_start();
  59         }
  60
  61 #ifdef USE_MMX
  62         fade_image(fb_pixels, logo, fade);
  63 #else
  64         {
  65                 int i, j;
  66                 uint32_t *src = logo;
  67                 uint16_t *dest = fb_pixels;
  68                 for(i=0; i<640*480; i++) {
  69                         uint32_t pix = *src++;
  70                         uint16_t r = (uint16_t)UNPACK_R32(pix) * fade / 256;
  71                         uint16_t g = (uint16_t)UNPACK_G32(pix) * fade / 256;
  72                         uint16_t b = (uint16_t)UNPACK_B32(pix) * fade / 256;
  73                         *dest++ = PACK_RGB16(r, g, b);
  74                 }
  75         }
  76 #endif
  77
  78         blit_frame(fb_pixels, 0);
  79 }
  80
  81 void intro_keyb(int key, int pressed)
  82 {
  83         if(pressed) {
  84                 menu_start();
  85         }
  86 }