// 8-bit sprite viewer, this displays a 320*240 tim file using two GsSPRITE structures
// Author : Paul Bircham [Doodle]
// Date : 20/7/98
// Notice : Please feel free to use this source, or parts in your program
// Contact : If you have any questions about this program feel free to e-mail me at doodlek@globalnet.co.uk
// with any of your questions and I will try and answer them

#include <libps.h>						
#include "pad.h"					

#define SCREEN_W    	(320)				// Screen resolution variables.
#define SCREEN_H	    (240)

#define VIDMODE		(MODE_PAL)

#define SpriteAdd      (0x80090000)      // memory address of sprite

#define OT_LENGTH 1						//Ordering Table length

// PROTOTYPE FUNCTIONS 
void InitGraphics();	
void InitOTs();		
void InitControllers() ;
void InitBgImage();	
								
// GLOBALS AND SYSTEM RELATED STUFF 

GsOT            WorldOT[2];
GsOT_TAG        OTTags[2][1<<OT_LENGTH];

int    activeBuff;

u_long PadStatus ;

PACKET          GpuPacketArea[2][10*1024];

GsSPRITE LeftImage, RightImage;

// MAIN FUNCTION

void main()
{

	InitGraphics();
    InitOTs();
    InitControllers() ;
	InitBgImage() ;

	PadStatus = PadRead() ;

    while(!(PadStatus&PADselect))
    {
    	activeBuff = GsGetActiveBuff();

        GsSetWorkBase((PACKET *)GpuPacketArea[activeBuff]);

        GsClearOt(0,0,&WorldOT[activeBuff]);
                
        GsSortSprite(&LeftImage,&WorldOT[activeBuff],0);
        GsSortSprite(&RightImage,&WorldOT[activeBuff],0);

        DrawSync(0);

        VSync(0);

        GsSwapDispBuff();

        GsSortClear(0,0,0,&WorldOT[activeBuff]);

        GsDrawOt(&WorldOT[activeBuff]);
	}
    ResetGraph(1);
}

// INITIALISE STUFF

void InitGraphics()
{
        SetVideoMode(VIDMODE);
        GsInitGraph(SCREEN_W, SCREEN_H, GsOFSGPU, 0, 0);
        GsDefDispBuff(0,0,0,SCREEN_H);
}

void InitOTs()
{
        int i;

        for(i=0;i<2;i++)
        {
                WorldOT[i].length = OT_LENGTH;
                WorldOT[i].org = OTTags[i];
        }
}

void InitBgImage()
{
		RECT rect;
		GsIMAGE timData;
		u_long test;
		
        //Setup Sprite (Sets up two sprites to display tim file)

        GsGetTimInfo((u_long *)(SpriteAdd+4),&timData);

        rect.x = timData.px;           
        rect.y = timData.py;             
        rect.w = timData.pw;
        rect.h = timData.ph;
        LoadImage(&rect, timData.pixel);

        rect.x=timData.cx;
        rect.y=timData.cy;
        rect.w=timData.cw;
        rect.h=timData.ch;
        LoadImage(&rect, timData.clut);

		DrawSync(0);
		
		test = (timData.px + 80) ;

        // Initialise Sprite Structure!

        LeftImage.attribute = (1<<24);
        LeftImage.x = 0;
        LeftImage.y = 0;
        LeftImage.w = timData.pw;
        LeftImage.h = timData.ph;
        LeftImage.tpage = GetTPage(1,0,timData.px,timData.py);
        LeftImage.u = 0;
        LeftImage.v = 0;
        LeftImage.r = 128;
        LeftImage.g = 128;
        LeftImage.b = 128;
        LeftImage.mx = 0;
        LeftImage.my = 0;
        LeftImage.scalex = ONE;
        LeftImage.scaley = ONE;
        LeftImage.rotate = 0;
        LeftImage.cx = timData.cx;
        LeftImage.cy = timData.cy;

        RightImage.attribute = (1<<24);
        RightImage.x = 160;
        RightImage.y = 0;
        RightImage.w = timData.pw;
        RightImage.h = timData.ph;
        RightImage.tpage = GetTPage(1,0,test,timData.py);
        RightImage.u = 32;		// Sets offset to next texture page
        RightImage.v = 0;
        RightImage.r = 128;
        RightImage.g = 128;
        RightImage.b = 128;
        RightImage.mx = 0;
        RightImage.my = 0;
        RightImage.scalex = ONE;
        RightImage.scaley = ONE;
        RightImage.rotate = 0;
        RightImage.cx = timData.cx;
        RightImage.cy = timData.cy;

        DrawSync(0);

}

void InitControllers()
{
	PadInit() ;
}