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295 lines
9.0 KiB
295 lines
9.0 KiB
/******************************Module*Header*******************************\
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* Module Name: xformer.cxx *
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* *
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* Contains the transform calculation workhorse routines. *
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* *
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* Created: 13-Nov-1990 11:06:09 *
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* Author: Wendy Wu [wendywu] *
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* *
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* Copyright (c) 1990 Microsoft Corporation *
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\**************************************************************************/
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extern "C" {
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// needed until we cleanup the floating point stuff in ntgdistr.h
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#define __CPLUSPLUS
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#include "engine.h"
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};
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#include "engine.hxx"
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#include "xformobj.hxx"
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/******************************Member*Function******************************\
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* bCvtPts(PMATRIX pmx, PPOINTL pSrc, PPOINTL pDest, SIZE cPtl) *
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* *
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* Apply the given transform matrix to a list of points. *
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* *
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* History: *
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* 13-Nov-1990 -by- Wendy Wu [wendywu] *
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* Wrote it. *
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\***************************************************************************/
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BOOL bCvtPts(PMATRIX pmx, PPOINTL pSrc, PPOINTL pDest, SIZE_T cPtl)
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{
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FIX fxX, fxY;
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ASSERTGDI(((pmx->flAccel & XFORM_FORMAT_LTOL) == 0),
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"bCvtPts: transform wrong format\n");
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switch (pmx->flAccel &
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(XFORM_SCALE|XFORM_UNITY|XFORM_FORMAT_LTOFX))
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{
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case XFORM_SCALE|XFORM_UNITY|XFORM_FORMAT_LTOFX:
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for ( ; cPtl > 0; cPtl--, pSrc++, pDest++)
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{
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pDest->x = LTOFX(pSrc->x) + pmx->fxDx;
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pDest->y = LTOFX(pSrc->y) + pmx->fxDy;
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}
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break;
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case XFORM_SCALE:
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case XFORM_SCALE|XFORM_FORMAT_LTOFX:
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for ( ; cPtl > 0; cPtl--, pSrc++, pDest++)
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{
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EFLOAT x,y;
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x = pSrc->x;
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y = pSrc->y;
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x *= pmx->efM11;
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y *= pmx->efM22;
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x.bEfToL(fxX); // convert result to long int
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y.bEfToL(fxY);
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pDest->x = fxX + pmx->fxDx;
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pDest->y = fxY + pmx->fxDy;
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}
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break;
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case 0: // transform not simple
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case XFORM_FORMAT_LTOFX:
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for ( ; cPtl > 0; cPtl--, pSrc++, pDest++)
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{
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EFLOAT x,y,xTemp;
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x = pSrc->x; // convert x, y to efloat
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y = pSrc->y;
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xTemp = (pmx->efM11 * x) + (pmx->efM21 * y);
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y = (pmx->efM12 * x) + (pmx->efM22 * y);
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xTemp.bEfToL(fxX); // convert result to long int
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y.bEfToL(fxY);
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pDest->x = fxX + pmx->fxDx;
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pDest->y = fxY + pmx->fxDy;
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}
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break;
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case (XFORM_SCALE|XFORM_UNITY):
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for ( ; cPtl > 0; cPtl--, pSrc++, pDest++)
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{
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pDest->x = FXTOLROUND(pSrc->x) + pmx->fxDx;
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pDest->y = FXTOLROUND(pSrc->y) + pmx->fxDy;
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}
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break;
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default:
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RIP("bCvtPts: unknown flAccel\n");
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}
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return(TRUE);
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}
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/******************************Member*Function******************************\
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* bCvtPts1(PMATRIX pmx, PPOINTL pptl, SIZE cPtl)
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*
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* Apply the given transform matrix to a list of points.
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* The input and output points are of the type POINTL.
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*
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* History:
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* 18-Dec-1992 -by- Wendy Wu [wendywu]
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* Wrote it.
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\***************************************************************************/
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BOOL bCvtPts1(PMATRIX pmx, PPOINTL pptl, SIZE_T cPtl)
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{
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ASSERTGDI(((pmx->flAccel & XFORM_FORMAT_LTOL) == 0),
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"bCvtPts: transform wrong format\n");
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LONG lx, ly;
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EFLOAT x, y;
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switch (pmx->flAccel &
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(XFORM_SCALE|XFORM_UNITY|XFORM_FORMAT_LTOFX))
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{
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case XFORM_SCALE|XFORM_FORMAT_LTOFX:
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for ( ; cPtl > 0; cPtl--, pptl++)
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{
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x = pptl->x * pmx->efM11.e;
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y = pptl->y * pmx->efM22.e;
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x.bEfToL(lx);
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y.bEfToL(ly);
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pptl->x = FXTOLROUND(lx + pmx->fxDx);
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pptl->y = FXTOLROUND(ly + pmx->fxDy);
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}
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break;
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case XFORM_SCALE|XFORM_UNITY|XFORM_FORMAT_LTOFX:
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lx = FXTOLROUND(pmx->fxDx);
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ly = FXTOLROUND(pmx->fxDy);
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for ( ; cPtl > 0; cPtl--, pptl++)
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{
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pptl->x += lx;
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pptl->y += ly;
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}
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break;
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case XFORM_FORMAT_LTOFX:
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for ( ; cPtl > 0; cPtl--, pptl++)
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{
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x = pptl->x * pmx->efM11.e + pptl->y * pmx->efM21.e;
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y = pptl->x * pmx->efM12.e + pptl->y * pmx->efM22.e;
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x.bEfToL(lx);
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y.bEfToL(ly);
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pptl->x = FXTOLROUND(lx + pmx->fxDx);
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pptl->y = FXTOLROUND(ly + pmx->fxDy);
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}
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break;
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case XFORM_SCALE:
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for ( ; cPtl > 0; cPtl--, pptl++)
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{
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x = LTOFX(pptl->x) * pmx->efM11.e;
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y = LTOFX(pptl->y) * pmx->efM22.e;
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x.bEfToL(pptl->x);
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y.bEfToL(pptl->y);
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pptl->x += pmx->fxDx;
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pptl->y += pmx->fxDy;
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}
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break;
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case XFORM_SCALE|XFORM_UNITY:
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for ( ; cPtl > 0; cPtl--, pptl++)
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{
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pptl->x += pmx->fxDx;
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pptl->y += pmx->fxDy;
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}
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break;
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case 0:
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for ( ; cPtl > 0; cPtl--, pptl++)
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{
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x = LTOFX(pptl->x) * pmx->efM11.e + LTOFX(pptl->y) * pmx->efM21.e;
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y = LTOFX(pptl->x) * pmx->efM12.e + LTOFX(pptl->y) * pmx->efM22.e;
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x.bEfToL(pptl->x);
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y.bEfToL(pptl->y);
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pptl->x += pmx->fxDx;
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pptl->y += pmx->fxDy;
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}
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break;
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default:
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RIP("bCvtPts: unknown flAccel\n");
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}
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return(TRUE);
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}
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/******************************Member*Function******************************\
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* bCvtVts(PMATRIX pmx, PVECTORL pSrc, PVECTORL pDest, SIZE cPtl) *
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* *
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* Apply the given transform matrix to a list of vectors. *
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* *
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* History: *
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* 13-Nov-1990 -by- Wendy Wu [wendywu] *
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* Wrote it. *
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\***************************************************************************/
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BOOL bCvtVts(PMATRIX pmx, PVECTORL pSrc, PVECTORL pDest, SIZE_T cPtl)
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{
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ASSERTGDI(((pmx->flAccel & XFORM_FORMAT_LTOL) == 0),
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"bCvtVts: transform wrong format\n");
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switch (pmx->flAccel &
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(XFORM_SCALE|XFORM_UNITY))
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{
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case XFORM_SCALE:
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for ( ; cPtl > 0; cPtl--, pSrc++, pDest++)
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{
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EFLOAT x,y;
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x = pSrc->x;
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y = pSrc->y;
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x *= pmx->efM11;
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y *= pmx->efM22;
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x.bEfToL(pDest->x);
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y.bEfToL(pDest->y);
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}
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break;
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case 0: // transform not simple
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case XFORM_FORMAT_LTOFX:
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for ( ; cPtl > 0; cPtl--, pSrc++, pDest++)
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{
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EFLOAT x,y,xTemp;
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x = pSrc->x; // convert x, y to efloat
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y = pSrc->y;
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xTemp = (pmx->efM11 * x) + (pmx->efM21 * y);
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y = (pmx->efM12 * x) + (pmx->efM22 * y);
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xTemp.bEfToL(pDest->x);
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y.bEfToL(pDest->y);
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}
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break;
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default:
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RIP("bCvtVts: unknown flAccel\n");
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}
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return(TRUE);
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}
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/******************************Member*Function******************************\
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* bCvtVts_FlToFl(PMATRIX pmx, PVECTORFL pSrc, PVECTORFL pDest, SIZE cPts) *
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* *
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* Convert a list of vectors using the given matrix. *
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* *
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* History: *
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* 13-Nov-1990 -by- Wendy Wu [wendywu] *
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* Wrote it. *
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\***************************************************************************/
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BOOL bCvtVts_FlToFl(
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MATRIX *pmx,
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VECTORFL *pvtflSrc,
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VECTORFL *pvtflDest,
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SIZE_T cPts)
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{
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for ( ; cPts > 0; cPts--, pvtflSrc++, pvtflDest++)
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{
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EFLOAT efXTemp;
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efXTemp = (pmx->efM11 * pvtflSrc->x) +
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(pmx->efM21 * pvtflSrc->y);
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pvtflDest->y = (pmx->efM12 * pvtflSrc->x) +
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(pmx->efM22 * pvtflSrc->y);
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pvtflDest->x = efXTemp;
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}
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return(TRUE);
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}
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