Path: chuka.playstation.co.uk!news
From: loonybit <ba124908@augsburg.baynet.de>
Newsgroups: scee.yaroze.programming.2d_graphics
Subject: Re: Displaying 4/8/16 bit TIMs
Date: Fri, 02 Oct 1998 19:37:33 +0200
Organization: PlayStation Net Yaroze (SCEE)
Lines: 132
Message-ID: <36150F5D.3B7DB795@augsburg.baynet.de>
References: <6uvd90$gul12@chuka.playstation.co.uk>
NNTP-Posting-Host: dial085.augsburg.baynet.de
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 4.05 [de] (WinNT; I)

I don't know, if the following is the reason for your problem, but i think the
following code you're using is wrong:

  pSprite->w         = img.pw;

instead you have to use something like that:

int pixelsPerWord;
    switch (img.pmode & 0x7)
    {
     case 0:
     pixelsPerWord = 4;
   break;
  case 1:
   pixelsPerWord = 2;
   break;
  case 2:
   pixelsPerWord = 1;
   break;
  default:
   // Unexpected pmode value
   pixelsPerWord = 0;
   break;
   }
   pSprite->w = img.pw * pixelsPerWord;

Cheers,

Andy


Maurice Sibrandi schrieb:

> #define IMAGE_4BIT                      (0x00000000)
> #define IMAGE_8BIT                      (0x00000001)
> #define IMAGE_16BIT                     (0x00000002)
> #define IMAGE_24BIT                     (0x00000003)
> #define IMAGE_CLUT                      (0x00000008) // bitfield!
>
> #define IMAGE_MODEMASK                  (0x00000007)
>
> #define SPRITE_BRIGHTNESS_ON            (0)
> #define SPRITE_BRIGHTNESS_OFF           (1<<6)
> #define SPRITE_4BIT_CLUT                (0)
> #define SPRITE_8BIT_CLUT                (1<<24)
> #define SPRITE_16BIT_DIRECT             (1<<25)
> #define SPRITE_ROTATE_ON                (0)
> #define SPRITE_ROTATE_OFF               (1<<27)
> #define SPRITE_STR_50_50                (0)
> #define SPRITE_STR_100_100              (1<<28)
> #define SPRITE_STR_100_MIN100           (1<<29)
> #define SPRITE_STR_100_25               ((1<<28) + (1<<29))
> #define SPRITE_SEMITRANSPARENT_OFF      (0)
> #define SPRITE_SEMITRANSPARENT_ON       (1<<30)
> #define SPRITE_DISPLAY_ON               (0)
> #define SPRITE_DISPLAY_OFF              (1<<31)
>
> void InitSprite(u_long* pAddr, GsSPRITE* pSprite)
> {
>   GsIMAGE img;
>   RECT    rc;
>
>   // get info from image
>   GsGetTimInfo(pAddr+1, &img);
>
>   // load image into VRAM
>   SetRECT(&rc, img.px, img.py, img.pw, img.ph);
>   LoadImage(&rc, img.pixel);
>   printf("Image : pos = %d, %d, size = %d, %d\n", img.px, img.py, img.pw,
> img.ph);
>
>   // load clut into VRAM
>   if (img.pmode & IMAGE_CLUT)
>   {
>     SetRECT(&rc, img.cx, img.cy, img.cw, img.ch);
>     LoadImage(&rc, img.clut);
>     printf("Clut : pos = %d, %d, size = %d, %d\n", img.cx, img.cy, img.cw,
> img.ch);
>   };
>
>   DrawSync(0);
>
>   // setup sprite structure
>   memset((void*)pSprite, 0, sizeof(GsSPRITE));
>
>   pSprite->x         = 0;
>   pSprite->y         = 0;
>   pSprite->w         = img.pw;
>   pSprite->h         = img.ph;
>   pSprite->tpage     = GetTPage(img.pmode & IMAGE_MODEMASK, 0, img.px,
> img.py) & 31;
>   pSprite->u         = img.px % 64;
>   pSprite->v         = img.py % 256;
>   pSprite->r         = 128;
>   pSprite->g         = 128;
>   pSprite->b         = 128;
>   pSprite->scalex    = ONE;
>   pSprite->scaley    = ONE;
>
>   switch(img.pmode & IMAGE_MODEMASK)
>
>     case IMAGE_4BIT :
>       pSprite->attribute |= SPRITE_4BIT_CLUT;
>       pSprite->w         *= 4;
>       //pSprite->u         *= 4;
>       pSprite->cx         = img.cx;
>       pSprite->cy         = img.cy;
>       break;
>
>     case IMAGE_8BIT :
>       pSprite->attribute |= SPRITE_8BIT_CLUT;
>       pSprite->w         *= 2;
>       //pSprite->u         *= 2;
>       pSprite->cx         = img.cx;
>       pSprite->cy         = img.cy;
>       break;
>
>     case IMAGE_16BIT :
>       pSprite->attribute |= SPRITE_16BIT_DIRECT;
>       break;
>
>     case IMAGE_24BIT :
>       ErrorExit("Sprite can't be 24 bit!!!");
>       break;
>   };
>
>   printf("Sprite : size = %d, %d, tpage = %d, %d, %d\n", pSprite->w,
> pSprite->h, pSprite->tpage, pSprite->u, pSprite->v);
> }