#include "lib2d.h"

// **** This sets up sprite information, such as x,y, what .TIM data to use etc. etc.
void SetSpriteInfo(GsSPRITE *tSprite, u_long tMemAddress, long tX, long tY)
  {
  GsIMAGE tTim;
  u_long tDepth1, tDepth2;

  // copy tim information into GsIMAGE structure for easy access
  GsGetTimInfo((u_long *) (tMemAddress+4), &tTim);

	// calculate the bit depth of texture image and set variables for use
	// case 0 = 16 colour, 1 = 256 colour, 2 = truecolour
	switch (tTim.pmode&3)
		{
		case 0:	{tDepth1=0; tDepth2=4; break;}
		case 1:	{tDepth1=1; tDepth2=2; break;}
		case 2:	{tDepth1=2; tDepth2=1; break;}
		}

	// set attribute to specify colour depth of texture image
	tSprite->attribute = (tDepth1<<24);
	// specify start position of sprite
  tSprite->x = tX;
  tSprite->y = tY;
  // set width of texture image (modified by bit depth)
	tSprite->w = tTim.pw * tDepth2;
  tSprite->h = tTim.ph;
  // set texture page for texture image
  tSprite->tpage = GetTPage(tDepth1, 0, tTim.px, tTim.py);
	// set texuture offset from top left of texture page
  tSprite->u = tTim.px%64;
  tSprite->v = tTim.py%256;
  // set CLUT if texture image is not truecolour
	if (!(tDepth1==2))
		{
	  tSprite->cx = tTim.cx;
	  tSprite->cy = tTim.cy;
	  }
	// set brightness regulation to normal
  tSprite->r = tSprite->g = tSprite->b = 128;
  // set handle to center of texture image
  tSprite->mx = tTim.pw*tDepth2/2;
  tSprite->my = tTim.ph/2;
  // set size and orientation to normal
  tSprite->scalex = tSprite->scaley = ONE;
  tSprite->rotate = 0;
  }