rom/dosboot/bootanim.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 /*
   7  * This animation code draws a picture centered on the screen
   8  * and flashes a specified region once per second.
   9  */
  10
  11 #include <aros/debug.h>
  12 #include <intuition/screens.h>
  13 #include <proto/exec.h>
  14 #include <proto/graphics.h>
  15
  16 #include "dosboot_intern.h"
  17 #include "nomedia_image.h"
  18 #include "nomedia_anim.h"
  19
  20 struct AnimData
  21 {
  22     UBYTE *picture;
  23     UBYTE frame;
  24     UWORD x;
  25     UWORD y;
  26 };
  27
  28 static const UBYTE *unpack_byterun1(const UBYTE *source, UBYTE *dest, LONG unpackedsize)
  29 {
  30     UBYTE r;
  31     BYTE c;
  32
  33     for(;;)
  34     {
  35         c = (BYTE)(*source++);
  36         if (c >= 0)
  37         {
  38             while(c-- >= 0)
  39             {
  40                 *dest++ = *source++;
  41                 if (--unpackedsize <= 0) return source;
  42             }
  43         }
  44         else if (c != -128)
  45         {
  46             c = -c;
  47             r = *source++;
  48
  49             while(c-- >= 0)
  50             {
  51                 *dest++ = r;
  52                 if (--unpackedsize <= 0) return source;
  53             }
  54         }
  55     }
  56 }
  57
  58 APTR anim_Init(struct Screen *scr, struct DOSBootBase *DOSBootBase)
  59 {
  60     D(bug("Screen: %dx%dx%d\nImage: %dx%dx%d\n",
  61         scr->Width, scr->Height, scr->RastPort.BitMap->Depth,
  62         NOMEDIA_WIDTH, NOMEDIA_HEIGHT, NOMEDIA_PLANES));
  63     if ((scr->Width >= NOMEDIA_WIDTH) && (scr->Height >= NOMEDIA_HEIGHT) &&
  64         (scr->RastPort.BitMap->Depth >= NOMEDIA_PLANES))
  65     {
  66         struct AnimData *ad = AllocMem(sizeof(struct AnimData), MEMF_ANY);
  67         ULONG size = NOMEDIA_WIDTH * NOMEDIA_HEIGHT;
  68
  69         if (ad)
  70         {
  71             ad->picture = AllocVec(size, MEMF_ANY);
  72
  73             if (ad->picture)
  74             {
  75                 ULONG i;
  76
  77                 unpack_byterun1(nomedia_data, ad->picture, size);
  78
  79                 for (i = 0; i < NOMEDIA_COLORS; i++)
  80                     SetRGB32(&scr->ViewPort, i, (nomedia_pal[i] << 8) & 0xFF000000,
  81                                                 (nomedia_pal[i] << 16) & 0xFF000000, (nomedia_pal[i] << 24) & 0xFF000000);
  82
  83                 SetAPen(&scr->RastPort, 0);
  84                 RectFill(&scr->RastPort, 0, 0, scr->Width, scr->Height);
  85
  86                 ad->x = (scr->Width  - NOMEDIA_WIDTH ) >> 1;
  87                 ad->y = (scr->Height - NOMEDIA_HEIGHT) >> 1;
  88                 WriteChunkyPixels(&scr->RastPort, ad->x, ad->y, ad->x + NOMEDIA_WIDTH - 1, ad->y + NOMEDIA_HEIGHT - 1,
  89                                   ad->picture, NOMEDIA_WIDTH);
  90
  91                 ad->frame = 0;
  92                 DOSBootBase->animData = ad;
  93                 DOSBootBase->delayTicks = 25;   /* We run at 2 frames per second */
  94                 return ad;
  95             }
  96             FreeMem(ad, sizeof(struct AnimData));
  97         }
  98     }
  99     return NULL;
 100 }
 101
 102 void anim_Animate(struct Screen *scr, struct DOSBootBase *DOSBootBase)
 103 {
 104     struct AnimData *ad = DOSBootBase->animData;
 105
 106     ad->frame = !ad->frame;
 107     if (ad->frame)
 108         RectFill(&scr->RastPort, ad->x + FLASH_X, ad->y + FLASH_Y,
 109                  ad->x + FLASH_X + FLASH_WIDTH - 1, ad->y + FLASH_Y + FLASH_HEIGHT - 1);
 110     else
 111     {
 112         WriteChunkyPixels(&scr->RastPort, ad->x + FLASH_X, ad->y + FLASH_Y,
 113                           ad->x + FLASH_X + FLASH_WIDTH - 1, ad->y + FLASH_Y + FLASH_HEIGHT - 1,
 114                           ad->picture + FLASH_X, NOMEDIA_WIDTH);
 115     }
 116 }
 117
 118 void anim_Stop(struct DOSBootBase *DOSBootBase)
 119 {
 120     struct AnimData *ad = DOSBootBase->animData;
 121
 122     if (ad)
 123     {
 124         FreeVec(ad->picture);
 125         FreeMem(ad, sizeof(struct AnimData));
 126
 127         DOSBootBase->animData = NULL;
 128     }
 129 }