reactos/subsystems/win32/win32k/objects/xformobj.c
Jérôme Gardou 88c9e7c6e8 Sync with trunk (r47116), hopefully without breaking anything.
svn path=/branches/reactos-yarotows/; revision=47117
2010-05-07 07:41:13 +00:00

530 lines
12 KiB
C

/*
* PROJECT: ReactOS win32 kernel mode subsystem
* LICENSE: GPL - See COPYING in the top level directory
* FILE: subsystems/win32/win32k/objects/xformobj.c
* PURPOSE: XFORMOBJ api
* PROGRAMMER: Timo Kreuzer
*/
/** Includes ******************************************************************/
#include <win32k.h>
#define NDEBUG
#include <debug.h>
C_ASSERT(sizeof(FIX) == sizeof(LONG));
#define FIX2LONG(x) ((x) >> 4)
#define LONG2FIX(x) ((x) << 4)
#define FLOATOBJ_Equal _FLOATOBJ_Equal
#define FLOATOBJ_GetLong _FLOATOBJ_GetLong
#define FLOATOBJ_GetFix _FLOATOBJ_GetFix
#define FLOATOBJ_IsLong _FLOATOBJ_IsLong
#define FLOATOBJ_Equal0 _FLOATOBJ_Equal0
#define FLOATOBJ_Equal1 _FLOATOBJ_Equal1
/** Inline helper functions ***************************************************/
/*
* Inline helper to calculate pfo1 * pfo2 + pfo3 * pfo4
*/
FORCEINLINE
VOID
MulAdd(
PFLOATOBJ pfoDest,
PFLOATOBJ pfo1,
PFLOATOBJ pfo2,
PFLOATOBJ pfo3,
PFLOATOBJ pfo4)
{
FLOATOBJ foTmp;
*pfoDest = *pfo1;
FLOATOBJ_Mul(pfoDest, pfo2);
foTmp = *pfo3;
FLOATOBJ_Mul(&foTmp, pfo4);
FLOATOBJ_Add(pfoDest, &foTmp);
}
/*
* Inline helper to calculate pfo1 * l2 + pfo3 * l4
*/
FORCEINLINE
VOID
MulAddLong(
PFLOATOBJ pfoDest,
PFLOATOBJ pfo1,
LONG l2,
PFLOATOBJ pfo3,
LONG l4)
{
FLOATOBJ foTmp;
*pfoDest = *pfo1;
FLOATOBJ_MulLong(pfoDest, l2);
foTmp = *pfo3;
FLOATOBJ_MulLong(&foTmp, l4);
FLOATOBJ_Add(pfoDest, &foTmp);
}
/*
* Inline helper to calculate pfo1 * pfo2 - pfo3 * pfo4
*/
FORCEINLINE
VOID
MulSub(
PFLOATOBJ pfoDest,
PFLOATOBJ pfo1,
PFLOATOBJ pfo2,
PFLOATOBJ pfo3,
PFLOATOBJ pfo4)
{
FLOATOBJ foTmp;
*pfoDest = *pfo1;
FLOATOBJ_Mul(pfoDest, pfo2);
foTmp = *pfo3;
FLOATOBJ_Mul(&foTmp, pfo4);
FLOATOBJ_Sub(pfoDest, &foTmp);
}
/*
* Inline helper to get the complexity hint from flAccel
*/
FORCEINLINE
ULONG
HintFromAccel(ULONG flAccel)
{
switch (flAccel & (MX_NOTRANSLATE | MX_IDENTITYSCALE | MX_SCALE))
{
case (MX_SCALE | MX_IDENTITYSCALE | MX_NOTRANSLATE):
return GX_IDENTITY;
case (MX_SCALE | MX_IDENTITYSCALE):
return GX_OFFSET;
case MX_SCALE:
return GX_SCALE;
default:
return GX_GENERAL;
}
}
/** Internal functions ********************************************************/
ULONG
INTERNAL_CALL
XFORMOBJ_UpdateAccel(
IN XFORMOBJ *pxo)
{
PMATRIX pmx = (PMATRIX)pxo;
/* Copy Dx and Dy to FIX format */
pmx->fxDx = FLOATOBJ_GetFix(&pmx->efDx);
pmx->fxDy = FLOATOBJ_GetFix(&pmx->efDy);
pmx->flAccel = 0;
if (FLOATOBJ_Equal0(&pmx->efDx) &&
FLOATOBJ_Equal0(&pmx->efDy))
{
pmx->flAccel |= MX_NOTRANSLATE;
}
if (FLOATOBJ_Equal0(&pmx->efM12) &&
FLOATOBJ_Equal0(&pmx->efM21))
{
pmx->flAccel |= MX_SCALE;
}
if (FLOATOBJ_Equal1(&pmx->efM11) &&
FLOATOBJ_Equal1(&pmx->efM22))
{
pmx->flAccel |= MX_IDENTITYSCALE;
}
if (FLOATOBJ_IsLong(&pmx->efM11) && FLOATOBJ_IsLong(&pmx->efM12) &&
FLOATOBJ_IsLong(&pmx->efM21) && FLOATOBJ_IsLong(&pmx->efM22))
{
pmx->flAccel |= MX_INTEGER;
}
return HintFromAccel(pmx->flAccel);
}
ULONG
INTERNAL_CALL
XFORMOBJ_iSetXform(
OUT XFORMOBJ *pxo,
IN XFORML * pxform)
{
PMATRIX pmx = (PMATRIX)pxo;
/* Check parameters */
if (!pxo || !pxform)
{
return DDI_ERROR;
}
/* Copy members */
FLOATOBJ_SetFloat(&pmx->efM11, pxform->eM11);
FLOATOBJ_SetFloat(&pmx->efM12, pxform->eM12);
FLOATOBJ_SetFloat(&pmx->efM21, pxform->eM21);
FLOATOBJ_SetFloat(&pmx->efM22, pxform->eM22);
FLOATOBJ_SetFloat(&pmx->efDx, pxform->eDx);
FLOATOBJ_SetFloat(&pmx->efDy, pxform->eDy);
/* Update accelerators and return complexity */
return XFORMOBJ_UpdateAccel(pxo);
}
/*
* Multiplies pxo1 with pxo2 and stores the result in pxo.
* returns complexity hint
* | efM11 efM12 0 |
* | efM21 efM22 0 |
* | efDx efDy 1 |
*/
ULONG
INTERNAL_CALL
XFORMOBJ_iCombine(
IN XFORMOBJ *pxo,
IN XFORMOBJ *pxo1,
IN XFORMOBJ *pxo2)
{
MATRIX mx;
PMATRIX pmx, pmx1, pmx2;
pmx = (PMATRIX)pxo;
pmx1 = (PMATRIX)pxo1;
pmx2 = (PMATRIX)pxo2;
/* Do a 3 x 3 matrix multiplication with mx as destinantion */
MulAdd(&mx.efM11, &pmx1->efM11, &pmx2->efM11, &pmx1->efM12, &pmx2->efM21);
MulAdd(&mx.efM12, &pmx1->efM11, &pmx2->efM12, &pmx1->efM12, &pmx2->efM22);
MulAdd(&mx.efM21, &pmx1->efM21, &pmx2->efM11, &pmx1->efM22, &pmx2->efM21);
MulAdd(&mx.efM22, &pmx1->efM21, &pmx2->efM12, &pmx1->efM22, &pmx2->efM22);
MulAdd(&mx.efDx, &pmx1->efDx, &pmx2->efM11, &pmx1->efDy, &pmx2->efM21);
FLOATOBJ_Add(&mx.efDx, &pmx2->efDx);
MulAdd(&mx.efDy, &pmx1->efDx, &pmx2->efM12, &pmx1->efDy, &pmx2->efM22);
FLOATOBJ_Add(&mx.efDy, &pmx2->efDy);
/* Copy back */
*pmx = mx;
/* Update accelerators and return complexity */
return XFORMOBJ_UpdateAccel(pxo);
}
ULONG
INTERNAL_CALL
XFORMOBJ_iCombineXform(
IN XFORMOBJ *pxo,
IN XFORMOBJ *pxo1,
IN XFORML *pxform,
IN BOOL bLeftMultiply)
{
MATRIX mx;
XFORMOBJ *pxo2 = (XFORMOBJ*)&mx;
XFORMOBJ_iSetXform(pxo2, pxform);
if (bLeftMultiply)
{
return XFORMOBJ_iCombine(pxo, pxo2, pxo1);
}
else
{
return XFORMOBJ_iCombine(pxo, pxo1, pxo2);
}
}
/*
* A^-1 = adj(A) / det(AT)
* A^-1 = 1/(a*d - b*c) * (a22,-a12,a21,-a11)
*/
ULONG
INTERNAL_CALL
XFORMOBJ_Inverse(
OUT XFORMOBJ *pxoDst,
IN XFORMOBJ *pxoSrc)
{
PMATRIX pmxDst, pmxSrc;
FLOATOBJ foDet;
pmxDst = (PMATRIX)pxoDst;
pmxSrc = (PMATRIX)pxoSrc;
/* det = M11 * M22 - M12 * M21 */
MulSub(&foDet, &pmxSrc->efM11, &pmxSrc->efM22, &pmxSrc->efM12, &pmxSrc->efM21);
if (FLOATOBJ_Equal0(&foDet))
{
/* Determinant is 0! */
return DDI_ERROR;
}
/* Calculate adj(A) / det(A) */
pmxDst->efM11 = pmxSrc->efM22;
FLOATOBJ_Div(&pmxDst->efM11, &foDet);
pmxDst->efM22 = pmxSrc->efM11;
FLOATOBJ_Div(&pmxDst->efM22, &foDet);
/* The other 2 are negative, negate foDet for that */
FLOATOBJ_Neg(&foDet);
pmxDst->efM12 = pmxSrc->efM21;
FLOATOBJ_Div(&pmxDst->efM12, &foDet);
pmxDst->efM21 = pmxSrc->efM12;
FLOATOBJ_Div(&pmxDst->efM22, &foDet);
/* Update accelerators and return complexity */
return XFORMOBJ_UpdateAccel(pxoDst);
}
BOOL
INTERNAL_CALL
XFORMOBJ_bXformFixPoints(
IN XFORMOBJ *pxo,
IN ULONG cPoints,
IN PPOINTL pptIn,
OUT PPOINTL pptOut)
{
PMATRIX pmx;
INT i;
FLOATOBJ fo1, fo2;
FLONG flAccel;
pmx = (PMATRIX)pxo;
flAccel = pmx->flAccel & (MX_INTEGER|MX_SCALE|MX_IDENTITYSCALE);
switch (flAccel)
{
case (MX_SCALE | MX_IDENTITYSCALE):
case (MX_SCALE | MX_IDENTITYSCALE | MX_INTEGER):
/* Identity transformation, nothing todo */
break;
case (MX_IDENTITYSCALE | MX_INTEGER):
/* 1-scale integer transform */
i = cPoints - 1;
do
{
LONG x = pptIn[i].x + pptIn[i].y * FLOATOBJ_GetLong(&pmx->efM21);
LONG y = pptIn[i].y + pptIn[i].x * FLOATOBJ_GetLong(&pmx->efM12);
pptOut[i].y = y;
pptOut[i].x = x;
}
while (--i >= 0);
break;
case (MX_SCALE | MX_INTEGER):
/* Diagonal integer transform */
i = cPoints - 1;
do
{
pptOut[i].x = pptIn[i].x * FLOATOBJ_GetLong(&pmx->efM11);
pptOut[i].y = pptIn[i].y * FLOATOBJ_GetLong(&pmx->efM22);
}
while (--i >= 0);
break;
case (MX_INTEGER):
/* Full integer transform */
i = cPoints - 1;
do
{
LONG x;
x = pptIn[i].x * FLOATOBJ_GetLong(&pmx->efM11);
x += pptIn[i].y * FLOATOBJ_GetLong(&pmx->efM21);
pptOut[i].y = pptIn[i].y * FLOATOBJ_GetLong(&pmx->efM22);
pptOut[i].y += pptIn[i].x * FLOATOBJ_GetLong(&pmx->efM12);
pptOut[i].x = x;
}
while (--i >= 0);
break;
case (MX_IDENTITYSCALE):
/* 1-scale transform */
i = cPoints - 1;
do
{
fo1 = pmx->efM21;
FLOATOBJ_MulLong(&fo1, pptIn[i].y);
fo2 = pmx->efM12;
FLOATOBJ_MulLong(&fo2, pptIn[i].x);
pptOut[i].x = pptIn[i].x + FLOATOBJ_GetLong(&fo1);
pptOut[i].y = pptIn[i].y + FLOATOBJ_GetLong(&fo2);
}
while (--i >= 0);
break;
case (MX_SCALE):
/* Diagonal float transform */
i = cPoints - 1;
do
{
fo1 = pmx->efM11;
FLOATOBJ_MulLong(&fo1, pptIn[i].x);
pptOut[i].x = FLOATOBJ_GetLong(&fo1);
fo2 = pmx->efM22;
FLOATOBJ_MulLong(&fo2, pptIn[i].y);
pptOut[i].y = FLOATOBJ_GetLong(&fo2);
}
while (--i >= 0);
break;
default:
/* Full float transform */
i = cPoints - 1;
do
{
MulAddLong(&fo1, &pmx->efM11, pptIn[i].x, &pmx->efM21, pptIn[i].y);
MulAddLong(&fo2, &pmx->efM12, pptIn[i].x, &pmx->efM22, pptIn[i].y);
pptOut[i].x = FLOATOBJ_GetLong(&fo1);
pptOut[i].y = FLOATOBJ_GetLong(&fo2);
}
while (--i >= 0);
break;
}
if (!(pmx->flAccel & MX_NOTRANSLATE))
{
/* Translate points */
i = cPoints - 1;
do
{
// DPRINT1("Translating Points (%d,%d)->(%d,%d)\n", pptOut[i].x, pptOut[i].y, pptOut[i].x + pmx->fxDx, pptOut[i].y + pmx->fxDy);
pptOut[i].x += pmx->fxDx;
pptOut[i].y += pmx->fxDy;
}
while (--i >= 0);
}
return TRUE;
}
/** Public functions **********************************************************/
// www.osr.com/ddk/graphics/gdifncs_0s2v.htm
ULONG
APIENTRY
XFORMOBJ_iGetXform(
IN XFORMOBJ *pxo,
OUT XFORML *pxform)
{
PMATRIX pmx = (PMATRIX)pxo;
/* Check parameters */
if (!pxo || !pxform)
{
return DDI_ERROR;
}
/* Copy members */
pxform->eM11 = FLOATOBJ_GetFloat(&pmx->efM11);
pxform->eM12 = FLOATOBJ_GetFloat(&pmx->efM12);
pxform->eM21 = FLOATOBJ_GetFloat(&pmx->efM21);
pxform->eM22 = FLOATOBJ_GetFloat(&pmx->efM22);
pxform->eDx = FLOATOBJ_GetFloat(&pmx->efDx);
pxform->eDy = FLOATOBJ_GetFloat(&pmx->efDy);
/* Return complexity hint */
return HintFromAccel(pmx->flAccel);
}
// www.osr.com/ddk/graphics/gdifncs_5ig7.htm
ULONG
APIENTRY
XFORMOBJ_iGetFloatObjXform(
IN XFORMOBJ *pxo,
OUT FLOATOBJ_XFORM *pxfo)
{
PMATRIX pmx = (PMATRIX)pxo;
/* Check parameters */
if (!pxo || !pxfo)
{
return DDI_ERROR;
}
/* Copy members */
pxfo->eM11 = pmx->efM11;
pxfo->eM12 = pmx->efM12;
pxfo->eM21 = pmx->efM21;
pxfo->eM22 = pmx->efM22;
pxfo->eDx = pmx->efDx;
pxfo->eDy = pmx->efDy;
/* Return complexity hint */
return HintFromAccel(pmx->flAccel);
}
// www.osr.com/ddk/graphics/gdifncs_027b.htm
BOOL
APIENTRY
XFORMOBJ_bApplyXform(
IN XFORMOBJ *pxo,
IN ULONG iMode,
IN ULONG cPoints,
IN PVOID pvIn,
OUT PVOID pvOut)
{
MATRIX mx;
POINTL *pptl;
INT i;
/* Check parameters */
if (!pxo || !pvIn || !pvOut || cPoints < 1)
{
return FALSE;
}
/* Use inverse xform? */
if (iMode == XF_INV_FXTOL || iMode == XF_INV_LTOL)
{
ULONG ret;
ret = XFORMOBJ_Inverse((XFORMOBJ*)&mx, pxo);
if (ret == DDI_ERROR)
{
return FALSE;
}
pxo = (XFORMOBJ*)&mx;
}
/* Convert POINTL to POINTFIX? */
if (iMode == XF_LTOFX || iMode == XF_LTOL || iMode == XF_INV_LTOL)
{
pptl = pvIn;
for (i = cPoints - 1; i >= 0; i--)
{
pptl[i].x = LONG2FIX(pptl[i].x);
pptl[i].y = LONG2FIX(pptl[i].y);
}
}
/* Do the actual fixpoint transformation */
if (!XFORMOBJ_bXformFixPoints(pxo, cPoints, pvIn, pvOut))
{
return FALSE;
}
/* Convert POINTFIX to POINTL? */
if (iMode == XF_INV_FXTOL || iMode == XF_INV_LTOL || iMode == XF_LTOL)
{
pptl = pvOut;
for (i = cPoints - 1; i >= 0; i--)
{
pptl[i].x = FIX2LONG(pptl[i].x);
pptl[i].y = FIX2LONG(pptl[i].y);
}
}
return TRUE;
}
/* EOF */