rom/dosboot/bootanim.c

   1 /*
   2  * This animation code draws a picture centered on the screen
   3  * and flashes a specified region once per second.
   4  */
   5
   6 #include <aros/debug.h>
   7 #include <intuition/screens.h>
   8 #include <proto/exec.h>
   9 #include <proto/graphics.h>
  10
  11 #include "dosboot_intern.h"
  12 #include "nomedia_image.h"
  13 #include "nomedia_anim.h"
  14
  15 struct AnimData
  16 {
  17     UBYTE *picture;
  18     UBYTE frame;
  19     UWORD x;
  20     UWORD y;
  21 };
  22
  23 static const UBYTE *unpack_byterun1(const UBYTE *source, UBYTE *dest, LONG unpackedsize)
  24 {
  25     UBYTE r;
  26     BYTE c;
  27
  28     for(;;)
  29     {
  30         c = (BYTE)(*source++);
  31         if (c >= 0)
  32         {
  33             while(c-- >= 0)
  34             {
  35                 *dest++ = *source++;
  36                 if (--unpackedsize <= 0) return source;
  37             }
  38         }
  39         else if (c != -128)
  40         {
  41             c = -c;
  42             r = *source++;
  43
  44             while(c-- >= 0)
  45             {
  46                 *dest++ = r;
  47                 if (--unpackedsize <= 0) return source;
  48             }
  49         }
  50     }
  51 }
  52
  53 APTR anim_Init(struct Screen *scr, struct DOSBootBase *DOSBootBase)
  54 {
  55     D(bug("Screen: %dx%dx%d\nImage: %dx%dx%d\n",
  56         scr->Width, scr->Height, scr->RastPort.BitMap->Depth,
  57         NOMEDIA_WIDTH, NOMEDIA_HEIGHT, NOMEDIA_PLANES));
  58     if ((scr->Width >= NOMEDIA_WIDTH) && (scr->Height >= NOMEDIA_HEIGHT) &&
  59         (scr->RastPort.BitMap->Depth >= NOMEDIA_PLANES))
  60     {
  61         struct AnimData *ad = AllocMem(sizeof(struct AnimData), MEMF_ANY);
  62         ULONG size = NOMEDIA_WIDTH * NOMEDIA_HEIGHT;
  63
  64         if (ad)
  65         {
  66             ad->picture = AllocVec(size, MEMF_ANY);
  67
  68             if (ad->picture)
  69             {
  70                 ULONG i;
  71
  72                 unpack_byterun1(nomedia_data, ad->picture, size);
  73
  74                 for (i = 0; i < NOMEDIA_COLORS; i++)
  75                     SetRGB32(&scr->ViewPort, i, (nomedia_pal[i] << 8) & 0xFF000000,
  76                                                 (nomedia_pal[i] << 16) & 0xFF000000, (nomedia_pal[i] << 24) & 0xFF000000);
  77
  78                 SetAPen(&scr->RastPort, 0);
  79                 RectFill(&scr->RastPort, 0, 0, scr->Width, scr->Height);
  80
  81                 ad->x = (scr->Width  - NOMEDIA_WIDTH ) >> 1;
  82                 ad->y = (scr->Height - NOMEDIA_HEIGHT) >> 1;
  83                 WriteChunkyPixels(&scr->RastPort, ad->x, ad->y, ad->x + NOMEDIA_WIDTH - 1, ad->y + NOMEDIA_HEIGHT - 1,
  84                                   ad->picture, NOMEDIA_WIDTH);
  85
  86                 ad->frame = 0;
  87                 DOSBootBase->animData = ad;
  88                 DOSBootBase->delayTicks = 25;   /* We run at 2 frames per second */
  89                 return ad;
  90             }
  91             FreeMem(ad, sizeof(struct AnimData));
  92         }
  93     }
  94     return NULL;
  95 }
  96
  97 void anim_Animate(struct Screen *scr, struct DOSBootBase *DOSBootBase)
  98 {
  99     struct AnimData *ad = DOSBootBase->animData;
 100
 101     ad->frame = !ad->frame;
 102     if (ad->frame)
 103         RectFill(&scr->RastPort, ad->x + FLASH_X, ad->y + FLASH_Y,
 104                  ad->x + FLASH_X + FLASH_WIDTH - 1, ad->y + FLASH_Y + FLASH_HEIGHT - 1);
 105     else
 106     {
 107         WriteChunkyPixels(&scr->RastPort, ad->x + FLASH_X, ad->y + FLASH_Y,
 108                           ad->x + FLASH_X + FLASH_WIDTH - 1, ad->y + FLASH_Y + FLASH_HEIGHT - 1,
 109                           ad->picture + FLASH_X, NOMEDIA_WIDTH);
 110     }
 111 }
 112
 113 void anim_Stop(struct DOSBootBase *DOSBootBase)
 114 {
 115     struct AnimData *ad = DOSBootBase->animData;
 116
 117     if (ad)
 118     {
 119         FreeVec(ad->picture);
 120         FreeMem(ad, sizeof(struct AnimData));
 121
 122         DOSBootBase->animData = NULL;
 123     }
 124 }