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implemented horizontal and vertical gradients in GradientFill()

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svn path=/trunk/; revision=8114
This commit is contained in:
Thomas Bluemel 2004-02-09 15:33:30 +00:00
parent 5a908e7efe
commit 8336410c76
1 changed files with 169 additions and 14 deletions
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183
reactos/subsys/win32k/eng/gradient.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: gradient.c,v 1.1 2004/02/08 21:37:52 weiden Exp $
/* $Id: gradient.c,v 1.2 2004/02/09 15:33:30 weiden Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -46,9 +46,34 @@
/* MACROS *********************************************************************/
const LONG LINC[2] = {-1, 1};
#define VERTEX(n) (pVertex + gt->n)
#define COMPAREVERTEX(a, b) ((a)->x == (b)->x && (a)->y == (b)->y)
#define VCMPCLR(a,b,c,color) (a->color != b->color || a->color != c->color)
#define VCMPCLRS(a,b,c) \
!(!VCMPCLR(a,b,c,Red) || !VCMPCLR(a,b,c,Green) || !VCMPCLR(a,b,c,Blue))
#define MOVERECT(r,x,y) \
r.left += x; r.right += x; \
r.top += y; r.bottom += y
/* Horizontal/Vertical gradients */
#define HVINITCOL(Col, id) \
c[id] = v1->Col >> 8; \
dc[id] = abs((v2->Col >> 8) - c[id]); \
ec[id] = -(dy >> 1); \
ic[id] = LINC[(v2->Col >> 8) > c[id]]
#define HVSTEPCOL(id) \
ec[id] += dc[id]; \
while(ec[id] > 0) \
{ \
c[id] += ic[id]; \
ec[id] -= dy; \
}
/* FUNCTIONS ******************************************************************/
BOOL FASTCALL
@ -61,31 +86,161 @@ IntEngGradientFillRect(
IN PGRADIENT_RECT gRect,
IN RECTL *prclExtents,
IN POINTL *pptlDitherOrg,
IN BOOL Vertical)
IN BOOL Horizontal)
{
/*
TRIVERTEX *v1, *v2;
RECT rcGradient, rcSG;
RECT_ENUM RectEnum;
BOOL EnumMore;
ULONG i;
POINTL Translate;
INTENG_ENTER_LEAVE EnterLeave;
LONG y, dy, c[3], dc[3], ec[3], ic[3];
v1 = (pVertex + gRect->UpperLeft);
v2 = (pVertex + gRect->LowerRight);
rcGradient.left = min(v1->x, v2->x);
rcGradient.right = max(v1->x, v2->x);
rcGradient.top = min(v1->y, v2->y);
rcGradient.bottom = max(v1->y, v2->y);
rcSG = rcGradient;
MOVERECT(rcSG, pptlDitherOrg->x, pptlDitherOrg->y);
if(Horizontal)
{
dy = abs(rcGradient.right - rcGradient.left);
}
else
{
dy = abs(rcGradient.bottom - rcGradient.top);
}
if((v1->Red != v2->Red || v1->Green != v2->Green || v1->Blue != v2->Blue) && dy > 1)
{
CLIPOBJ_cEnumStart(pco, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, 0);
do
{
RECT FillRect;
SURFOBJ *OutputObj;
SURFGDI *OutputGDI;
ULONG Color;
if(Horizontal)
{
EnumMore = CLIPOBJ_bEnum(pco, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
for (i = 0; i < RectEnum.c && RectEnum.arcl[i].top <= rcSG.bottom; i++)
{
if(NtGdiIntersectRect(&FillRect, &RectEnum.arcl[i], &rcSG))
{
HVINITCOL(Red, 0);
HVINITCOL(Green, 1);
HVINITCOL(Blue, 2);
if(!IntEngEnter(&EnterLeave, psoDest, &FillRect, FALSE, &Translate, &OutputObj))
{
return FALSE;
}
OutputGDI = AccessInternalObjectFromUserObject(OutputObj);
for(y = rcSG.left; y < FillRect.right; y++)
{
if(y >= FillRect.left)
{
Color = XLATEOBJ_iXlate(pxlo, RGB(c[0], c[1], c[2]));
OutputGDI->DIB_VLine(OutputObj, y, FillRect.top, FillRect.bottom, Color);
}
HVSTEPCOL(0);
HVSTEPCOL(1);
HVSTEPCOL(2);
}
if(!IntEngLeave(&EnterLeave))
{
return FALSE;
}
}
}
continue;
}
/* vertical */
EnumMore = CLIPOBJ_bEnum(pco, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
for (i = 0; i < RectEnum.c && RectEnum.arcl[i].top <= rcSG.bottom; i++)
{
if(NtGdiIntersectRect(&FillRect, &RectEnum.arcl[i], &rcSG))
{
HVINITCOL(Red, 0);
HVINITCOL(Green, 1);
HVINITCOL(Blue, 2);
if(!IntEngEnter(&EnterLeave, psoDest, &FillRect, FALSE, &Translate, &OutputObj))
{
return FALSE;
}
OutputGDI = AccessInternalObjectFromUserObject(OutputObj);
for(y = rcSG.top; y < FillRect.bottom; y++)
{
if(y >= FillRect.top)
{
Color = XLATEOBJ_iXlate(pxlo, RGB(c[0], c[1], c[2]));
OutputGDI->DIB_HLine(OutputObj, FillRect.left, FillRect.right, y, Color);
}
HVSTEPCOL(0);
HVSTEPCOL(1);
HVSTEPCOL(2);
}
if(!IntEngLeave(&EnterLeave))
{
return FALSE;
}
}
}
} while(EnumMore);
return TRUE;
}
/* rectangle has only one color, no calculation required */
CLIPOBJ_cEnumStart(pco, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, 0);
do
{
EnumMore = CLIPOBJ_bEnum(pco, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
for (i = 0; i < RectEnum.c && RectEnum.arcl[i].top <= y1; i++)
{
RECT FillRect;
SURFOBJ *OutputObj;
SURFGDI *OutputGDI;
ULONG Color = XLATEOBJ_iXlate(pxlo, RGB(v1->Red, v1->Green, v1->Blue));
EnumMore = CLIPOBJ_bEnum(pco, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
for (i = 0; i < RectEnum.c && RectEnum.arcl[i].top <= rcSG.bottom; i++)
{
if(NtGdiIntersectRect(&FillRect, &RectEnum.arcl[i], &rcSG))
{
if(!IntEngEnter(&EnterLeave, psoDest, &FillRect, FALSE, &Translate, &OutputObj))
{
return FALSE;
}
OutputGDI = AccessInternalObjectFromUserObject(OutputObj);
for(; FillRect.top < FillRect.bottom; FillRect.top++)
{
OutputGDI->DIB_HLine(OutputObj, FillRect.left, FillRect.right, FillRect.top, Color);
}
if(!IntEngLeave(&EnterLeave))
{
return FALSE;
}
}
}
} while(EnumMore);
*/
return FALSE;
return TRUE;
}
#define NLINES 3
#define VCMPCLR(a,b,c,color) (a->color != b->color || a->color != c->color)
#define VCMPCLRS(a,b,c) \
!(!VCMPCLR(a,b,c,Red) || !VCMPCLR(a,b,c,Green) || !VCMPCLR(a,b,c,Blue))
BOOL FASTCALL
IntEngGradientFillTriangle(
IN SURFOBJ *psoDest,
@ -100,6 +255,7 @@ IntEngGradientFillTriangle(
PTRIVERTEX v1, v2, v3;
RECT_ENUM RectEnum;
BOOL EnumMore;
ULONG i;
POINTL Translate;
INTENG_ENTER_LEAVE EnterLeave;
@ -136,7 +292,6 @@ IntEngGradientFillTriangle(
CLIPOBJ_cEnumStart(pco, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, 0);
do
{
LONG i;
RECT FillRect;
SURFOBJ *OutputObj;
SURFGDI *OutputGDI;
@ -208,7 +363,7 @@ EngGradientFill(
for(i = 0; i < nMesh; i++, gr++)
{
if(!IntEngGradientFillRect(psoDest, pco, pxlo, pVertex, nVertex, gr, prclExtents,
pptlDitherOrg, (ulMode == GRADIENT_FILL_RECT_V)))
pptlDitherOrg, (ulMode == GRADIENT_FILL_RECT_H)))
{
return FALSE;
}