* 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
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(
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);
}
projects / reactos.git / commitdiff