29 lines
1.1 KiB
C
29 lines
1.1 KiB
C
typedef struct _geom_elem {
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double coeffs[6];
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} pGeomDefRec, *pGeomDefPtr;
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typedef struct _mpgeombanddef {
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int yOut;
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int in_width;
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} mpGeometryBandRec, *mpGeometryBandPtr;
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typedef void *pointer;
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typedef unsigned char CARD8;
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typedef CARD8 BytePixel;
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void BiGL_B (OUTP,srcimg,width,sline,pedpvt,pvtband) pointer OUTP;
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pointer *srcimg;
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register int width;
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int sline;
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pGeomDefPtr pedpvt; mpGeometryBandPtr pvtband;
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{
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register float s, t, st;
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register int isrcline,isrcpix;
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register int srcwidth = pvtband->in_width - 1;
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register BytePixel val;
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register BytePixel *ptrIn, *ptrJn;
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register double a = pedpvt->coeffs[0];
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register double c = pedpvt->coeffs[2];
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register double srcpix = a * ((double)(0.0000)) + pedpvt->coeffs[1] * (pvtband->yOut + ((double)(0.0000)) ) + pedpvt->coeffs[4];
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register double srcline = c * ((double)(0.0000)) + pedpvt->coeffs[3] * (pvtband->yOut + ((double)(0.0000)) ) + pedpvt->coeffs[5];
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if ( (isrcpix >= 0) && (isrcpix < srcwidth) )
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val = ptrIn[isrcpix] * ((float)1. - s - t + st) + ptrIn[isrcpix+1] * (s - st) + ptrJn[isrcpix] * (t - st) + ptrJn[isrcpix+1] * (st) + (float)0.5 ;
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}
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