Path: chuka.playstation.co.uk!news
From: george_bain@playstation.sony.com (George Bain)
Newsgroups: scee.yaroze.programming.2d_graphics
Subject: Re: Main ram to Vram
Date: 27 Apr 1999 08:01:46 GMT
Organization: Sony Computer Entertainment Europe
Lines: 79
Message-ID: <7g3qta$7353@chuka.playstation.co.uk>
References: <372472AE.67F50636@netcomuk.co.uk>
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Hi Chief!

You do it all the time when loading in images...
e.g LoadImage() - main to vram transfer.  Also if
you use the textures on the Boot CD you can overwrite
any main memory previously used and do another LoadImage().

Regards,

George@SCEE

//--------------------------------------------------------------------------
// Function: ReadTIM()
// Description: Read a TIM and CLUT(if 4 bit or 8 bit) and transfer to VRAM
// Parameters: u_long *addr: address of TIM
// Returns: GsIMAGE: address of tim image
// Notes: N/A
//-------------------------------------------------------------------------- 

GsIMAGE *ReadTIM( u_long *addr )
 { 	
   
	static GsIMAGE tim;	 
	RECT rect; 			
			
	// skip id and initialize image structure 
	addr ++;
	GsGetTimInfo(addr, &tim);	

	// transfer pixel data to VRAM 
	rect.x = tim.px;
	rect.y = tim.py;
	rect.w = tim.pw;
	rect.h = tim.ph;
	LoadImage(&rect, tim.pixel);

	DrawSync(0);

    // check if CLUT exists and transfer it to VRAM 
 	if( (tim.pmode >> 3) & 0x01 ) 
 	  {
 	  	rect.x = tim.cx;
	  	rect.y = tim.cy;
	  	rect.w = tim.cw;
	  	rect.h = tim.ch;
	  	LoadImage(&rect, tim.clut);
	  }	
	  
    DrawSync(0);

    printf(" IMAGE - x:(%d), y:(%d), w:(%d), h:(%d) \n", tim.px, 
tim.py,tim.pw,tim.ph );  
    printf(" CLUT - x:(%d), y:(%d), w:(%d), h:(%d) \n", tim.cx, 
tim.cy,tim.cw,tim.ch );
    printf(" image mode:%d \n", tim.pmode);   
	printf(" tim addr: %p \n",&tim);

    return(&tim);
	

 }// end ReadTIM




In article <372472AE.67F50636@netcomuk.co.uk>, mlambert@netcomuk.co.uk says...
>
>Hi,
>        When I asked about memory, George Bain suggested using main Ram
>and transfering to Vram, does this mean that you can transfer Tims
>between the two
>giving more space for graphics?
>    If so, how do you do this?
>
>        Cheers,
>
>                The CHIEF
>