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basic implementation of filling gradient triangles in GradientFill()

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svn path=/trunk/; revision=8117
This commit is contained in:
Thomas Bluemel 2004-02-09 22:16:50 +00:00
parent 8fe4a9e38d
commit 46849d1bdd
1 changed files with 194 additions and 30 deletions
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224
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 1.3 2004/02/09 16:37:59 weiden Exp $
/* $Id: gradient.c,v 1.4 2004/02/09 22:16:50 weiden Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -212,6 +212,109 @@ IntEngGradientFillRect(
return IntEngLeave(&EnterLeave);
}
/* Fill triangle with solid color */
#define S_FILLLINE(linefrom,lineto) \
if(sx[lineto] < sx[linefrom]) \
OutputGDI->DIB_HLine(OutputObj, max(sx[lineto], FillRect.left), min(sx[linefrom], FillRect.right), sy, Color); \
else \
OutputGDI->DIB_HLine(OutputObj, max(sx[linefrom], FillRect.left), min(sx[lineto], FillRect.right), sy, Color);
#define S_DOLINE(a,b,line) \
ex[line] += dx[line]; \
while(ex[line] > 0 && x[line] != destx[line]) \
{ \
x[line] += incx[line]; \
sx[line] += incx[line]; \
ex[line] -= dy[line]; \
}
#define S_GOLINE(a,b,line) \
if(y >= a->y && y <= b->y) \
{
#define S_ENDLINE(a,b,line) \
}
#define S_INITLINE(a,b,line) \
x[line] = a->x; \
sx[line] = a->x + pptlDitherOrg->x; \
dx[line] = abs(b->x - a->x); \
dy[line] = abs(b->y - a->y); \
incx[line] = LINC[b->x > a->x]; \
ex[line] = -(dy[line]>>1); \
destx[line] = b->x
/* Fill triangle with gradient */
#define INITCOL(a,b,line,col,id) \
c[line][id] = a->col >> 8; \
dc[line][id] = abs((b->col >> 8) - c[line][id]); \
ec[line][id] = -(dy[line]>>1); \
ic[line][id] = LINC[(b->col >> 8) > c[line][id]]
#define STEPCOL(a,b,line,col,id) \
ec[line][id] += dc[line][id]; \
while(ec[line][id] > 0) \
{ \
c[line][id] += ic[line][id]; \
ec[line][id] -= dy[line]; \
}
#define FINITCOL(linefrom,lineto,colid) \
gc[colid] = c[linefrom][colid]; \
gd[colid] = abs(c[lineto][colid] - gc[colid]); \
ge[colid] = -(gx >> 1); \
gi[colid] = LINC[c[lineto][colid] > gc[colid]]
#define FDOCOL(linefrom,lineto,colid) \
ge[colid] += gd[colid]; \
while(ge[colid] > 0) \
{ \
gc[colid] += gi[colid]; \
ge[colid] -= gx; \
}
#define FILLLINE(linefrom,lineto) \
gx = abs(sx[lineto] - sx[linefrom]); \
gxi = LINC[sx[linefrom] < sx[lineto]]; \
FINITCOL(linefrom, lineto, 0); \
FINITCOL(linefrom, lineto, 1); \
FINITCOL(linefrom, lineto, 2); \
for(g = sx[linefrom]; g != sx[lineto]; g += gxi) \
{ \
if(g >= FillRect.left && g < FillRect.right) \
{ \
Color = XLATEOBJ_iXlate(pxlo, RGB(gc[0], gc[1], gc[2])); \
OutputGDI->DIB_PutPixel(OutputObj, g, sy, Color); \
} \
FDOCOL(linefrom, lineto, 0); \
FDOCOL(linefrom, lineto, 1); \
FDOCOL(linefrom, lineto, 2); \
}
#define DOLINE(a,b,line) \
STEPCOL(a, b, line, Red, 0); \
STEPCOL(a, b, line, Green, 1); \
STEPCOL(a, b, line, Blue, 2); \
ex[line] += dx[line]; \
while(ex[line] > 0 && x[line] != destx[line]) \
{ \
x[line] += incx[line]; \
sx[line] += incx[line]; \
ex[line] -= dy[line]; \
}
#define GOLINE(a,b,line) \
if(y >= a->y && y <= b->y) \
{
#define ENDLINE(a,b,line) \
}
#define INITLINE(a,b,line) \
x[line] = a->x; \
sx[line] = a->x + pptlDitherOrg->x; \
dx[line] = abs(b->x - a->x); \
dy[line] = abs(b->y - a->y); \
incx[line] = LINC[b->x > a->x]; \
ex[line] = -(dy[line]>>1); \
destx[line] = b->x
#define DOINIT(a, b, line) \
INITLINE(a, b, line); \
INITCOL(a, b, line, Red, 0); \
INITCOL(a, b, line, Green, 1); \
INITCOL(a, b, line, Blue, 2);
#define SMALLER(a,b) (a->y < b->y) || (a->y == b->y && a->x < b->x)
#define SWAP(a,b,c) c = a;\
a = b;\
a = c
#define NLINES 3
BOOL FASTCALL
IntEngGradientFillTriangle(
@ -224,77 +327,138 @@ IntEngGradientFillTriangle(
IN RECTL *prclExtents,
IN POINTL *pptlDitherOrg)
{
SURFOBJ *OutputObj;
SURFGDI *OutputGDI;
PTRIVERTEX v1, v2, v3;
RECT_ENUM RectEnum;
BOOL EnumMore;
ULONG i;
POINTL Translate;
INTENG_ENTER_LEAVE EnterLeave;
RECT FillRect;
ULONG Color;
BOOL sx[NLINES];
LONG x[NLINES], dx[NLINES], dy[NLINES], incx[NLINES], ex[NLINES], destx[NLINES];
LONG c[NLINES][3], dc[NLINES][3], ec[NLINES][3], ic[NLINES][3]; /* colors on lines */
LONG g, gx, gxi, gc[3], gd[3], ge[3], gi[3]; /* colors in triangle */
LONG sy, y, bt;
v1 = (pVertex + gTriangle->Vertex1);
v2 = (pVertex + gTriangle->Vertex2);
v3 = (pVertex + gTriangle->Vertex3);
/* sort */
if(v1->y > v2->y)
/* bubble sort */
if(SMALLER(v2,v1))
{
TRIVERTEX *t;
t = v1;
v1 = v2;
v2 = t;
SWAP(v1,v2,t);
}
if(v2->y > v3->y)
if(SMALLER(v3,v2))
{
TRIVERTEX *t;
t = v2;
v2 = v3;
v3 = t;
if(v1->y > v2->y)
SWAP(v2,v3,t);
if(SMALLER(v2,v1))
{
t = v1;
v1 = v2;
v2 = t;
SWAP(v1,v2,t);
}
}
DbgPrint("Triangle: (%i,%i) (%i,%i) (%i,%i)\n", v1->x, v1->y, v2->x, v2->y, v3->x, v3->y);
if(!IntEngEnter(&EnterLeave, psoDest, &FillRect, FALSE, &Translate, &OutputObj))
{
return FALSE;
}
OutputGDI = AccessInternalObjectFromUserObject(OutputObj);
if(VCMPCLRS(v1, v2, v3))
{
CLIPOBJ_cEnumStart(pco, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, 0);
do
{
RECT FillRect;
SURFOBJ *OutputObj;
SURFGDI *OutputGDI;
EnumMore = CLIPOBJ_bEnum(pco, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
for (i = 0; i < RectEnum.c; i++)
for (i = 0; i < RectEnum.c && RectEnum.arcl[i].top <= prclExtents->bottom; i++)
{
if(NtGdiIntersectRect(&FillRect, &RectEnum.arcl[i], prclExtents))
{
if(!IntEngEnter(&EnterLeave, psoDest, &FillRect, FALSE, &Translate, &OutputObj))
{
return FALSE;
}
OutputGDI = AccessInternalObjectFromUserObject(OutputObj);
DOINIT(v1, v3, 0);
DOINIT(v1, v2, 1);
DOINIT(v2, v3, 2);
/* FIXME - Render gradient triangle */
y = v1->y;
sy = v1->y + pptlDitherOrg->y;
bt = min(v3->y + pptlDitherOrg->y, FillRect.bottom);
if(!IntEngLeave(&EnterLeave))
while(sy < bt)
{
return FALSE;
GOLINE(v1, v3, 0);
DOLINE(v1, v3, 0);
ENDLINE(v1, v3, 0);
GOLINE(v1, v2, 1);
DOLINE(v1, v2, 1);
FILLLINE(0, 1);
ENDLINE(v1, v2, 1);
GOLINE(v2, v3, 2);
DOLINE(v2, v3, 2);
FILLLINE(0, 2);
ENDLINE(23, v3, 2);
y++;
sy++;
}
}
}
} while(EnumMore);
return TRUE;
return IntEngLeave(&EnterLeave);
}
/* FIXME - fill triangle with one solid color */
/* fill triangle with one solid color */
return FALSE;
Color = XLATEOBJ_iXlate(pxlo, RGB(v1->Red >> 8, v1->Green >> 8, v1->Blue >> 8));
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 <= prclExtents->bottom; i++)
{
if(NtGdiIntersectRect(&FillRect, &RectEnum.arcl[i], prclExtents))
{
S_INITLINE(v1, v3, 0);
S_INITLINE(v1, v2, 1);
S_INITLINE(v2, v3, 2);
y = v1->y;
sy = v1->y + pptlDitherOrg->y;
bt = min(v3->y + pptlDitherOrg->y, FillRect.bottom);
while(sy < bt)
{
S_GOLINE(v1, v3, 0);
S_DOLINE(v1, v3, 0);
S_ENDLINE(v1, v3, 0);
S_GOLINE(v1, v2, 1);
S_DOLINE(v1, v2, 1);
S_FILLLINE(0, 1);
S_ENDLINE(v1, v2, 1);
S_GOLINE(v2, v3, 2);
S_DOLINE(v2, v3, 2);
S_FILLLINE(0, 2);
S_ENDLINE(23, v3, 2);
y++;
sy++;
}
}
}
} while(EnumMore);
return IntEngLeave(&EnterLeave);
}