Пример #1
0
int PixelTranspType (short nTexture, short nOrient, short nFrame, fix u, fix v)
{
	CBitmap *bmP;
	int bmx, bmy, w, h, offs;
	ubyte	c;
#if 0
	tBitmapIndex *bmiP;

bmiP = gameData.pig.tex.bmIndexP + (nTexture);
LoadBitmap (*bmiP, gameStates.app.bD1Data);
bmP = BmOverride (gameData.pig.tex.bitmapP + bmiP->index);
#else
bmP = LoadFaceBitmap (nTexture, nFrame);
if (!bmP->Buffer ())
	return 0;
#endif
if (bmP->Flags () & BM_FLAG_RLE)
	bmP = rle_expand_texture (bmP);
w = bmP->Width ();
h = ((bmP->Type () == BM_TYPE_ALT) && bmP->Frames ()) ? w : bmP->Height ();
if (nOrient == 0) {
	bmx = ((unsigned) X2I (u * w)) % w;
	bmy = ((unsigned) X2I (v * h)) % h;
	}
else if (nOrient == 1) {
	bmx = ((unsigned) X2I ((I2X (1) - v) * w)) % w;
	bmy = ((unsigned) X2I (u * h)) % h;
	}
else if (nOrient == 2) {
	bmx = ((unsigned) X2I ((I2X (1) - u) * w)) % w;
	bmy = ((unsigned) X2I ((I2X (1) - v) * h)) % h;
	}
else {
	bmx = ((unsigned) X2I (v * w)) % w;
	bmy = ((unsigned) X2I ((I2X (1) - u) * h)) % h;
	}
offs = bmy * w + bmx;
if (bmP->Flags () & BM_FLAG_TGA) {
	ubyte *p;

	if (bmP->BPP () == 3)	//no alpha -> no transparency
		return 0;
	p = bmP->Buffer () + offs * bmP->BPP ();
	// check super transparency color
#if 1
	if ((p [0] == 120) && (p [1] == 88) && (p [2] == 128))
#else
	if ((gameOpts->ogl.bGlTexMerge) ?
	    (p [3] == 1) : ((p [0] == 120) && (p [1] == 88) && (p [2] == 128)))
#endif
		return -1;
	// check alpha
	if (!p [3])
		return 1;
	}
else {
	c = bmP->Buffer () [offs];
	if (c == SUPER_TRANSP_COLOR)
		return -1;
	if (c == TRANSPARENCY_COLOR)
		return 1;
	}
return 0;
}