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gdi32: Improved PolyDraw in path closed case.

This commit is contained in:
Evan Stade 2007-07-18 19:41:13 -07:00 committed by Alexandre Julliard
parent 00631b2480
commit 099bfbe1a4
1 changed files with 68 additions and 39 deletions
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107
dlls/gdi32/painting.c
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@ -824,8 +824,8 @@ BOOL WINAPI PolyDraw(HDC hdc, const POINT *lppt, const BYTE *lpbTypes,
{
DC *dc;
BOOL result = FALSE;
POINT lastmove;
unsigned int i;
POINT * line_pts = NULL, * bzr_pts = NULL, bzr[4];
INT i, num_pts, num_bzr_pts, space, size;
dc = DC_GetDCUpdate( hdc );
if(!dc) return FALSE;
@ -835,47 +835,76 @@ BOOL WINAPI PolyDraw(HDC hdc, const POINT *lppt, const BYTE *lpbTypes,
else if(dc->funcs->pPolyDraw)
result = dc->funcs->pPolyDraw( dc->physDev, lppt, lpbTypes, cCount );
else {
/* check for each bezierto if there are two more points */
for( i = 0; i < cCount; i++ )
if( lpbTypes[i] != PT_MOVETO &&
lpbTypes[i] & PT_BEZIERTO )
{
if( cCount < i+3 )
goto end;
else
i += 2;
}
/* check for valid point types */
for(i = 0; i < cCount; i++) {
switch(lpbTypes[i]) {
case PT_MOVETO:
case PT_LINETO | PT_CLOSEFIGURE:
case PT_LINETO:
break;
case PT_BEZIERTO:
if((i + 2 < cCount) && (lpbTypes[i + 1] == PT_BEZIERTO) &&
((lpbTypes[i + 2] & ~PT_CLOSEFIGURE) == PT_BEZIERTO)){
i += 2;
break;
}
default:
goto end;
}
}
/* if no moveto occurs, we will close the figure here */
lastmove.x = dc->CursPosX;
lastmove.y = dc->CursPosY;
space = cCount + 300;
line_pts = HeapAlloc(GetProcessHeap(), 0, space * sizeof(POINT));
num_pts = 1;
/* now let's draw */
for( i = 0; i < cCount; i++ )
{
if( lpbTypes[i] == PT_MOVETO )
{
MoveToEx( hdc, lppt[i].x, lppt[i].y, NULL );
lastmove.x = dc->CursPosX;
lastmove.y = dc->CursPosY;
}
else if( lpbTypes[i] & PT_LINETO )
LineTo( hdc, lppt[i].x, lppt[i].y );
else if( lpbTypes[i] & PT_BEZIERTO )
{
PolyBezierTo( hdc, &lppt[i], 3 );
i += 2;
}
else
goto end;
line_pts[0].x = dc->CursPosX;
line_pts[0].y = dc->CursPosY;
if( lpbTypes[i] & PT_CLOSEFIGURE )
{
LineTo( hdc, lastmove.x, lastmove.y );
}
}
for(i = 0; i < cCount; i++) {
switch(lpbTypes[i]) {
case PT_MOVETO:
if(num_pts >= 2)
Polyline(dc->hSelf, line_pts, num_pts);
num_pts = 0;
line_pts[num_pts++] = lppt[i];
break;
case PT_LINETO:
case (PT_LINETO | PT_CLOSEFIGURE):
line_pts[num_pts++] = lppt[i];
break;
case PT_BEZIERTO:
bzr[0].x = line_pts[num_pts - 1].x;
bzr[0].y = line_pts[num_pts - 1].y;
memcpy(&bzr[1], &lppt[i], 3 * sizeof(POINT));
result = TRUE;
bzr_pts = GDI_Bezier(bzr, 4, &num_bzr_pts);
size = num_pts + (cCount - i) + num_bzr_pts;
if(space < size){
space = size * 2;
line_pts = HeapReAlloc(GetProcessHeap(), 0, line_pts,
space * sizeof(POINT));
}
memcpy(&line_pts[num_pts], &bzr_pts[1],
(num_bzr_pts - 1) * sizeof(POINT));
num_pts += num_bzr_pts - 1;
HeapFree(GetProcessHeap(), 0, bzr_pts);
i += 2;
break;
default:
goto end;
}
if(lpbTypes[i] & PT_CLOSEFIGURE)
line_pts[num_pts++] = line_pts[0];
}
if(num_pts >= 2)
Polyline(dc->hSelf, line_pts, num_pts);
MoveToEx(dc->hSelf, line_pts[num_pts - 1].x, line_pts[num_pts - 1].y, NULL);
result = TRUE;
}
end: