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gdiplus: Use base inset for custom line caps.

This commit is contained in:
Evan Stade 2007-07-20 17:50:07 -07:00 committed by Alexandre Julliard
parent 8c5bcef9f3
commit f56fa321f5
1 changed files with 38 additions and 8 deletions
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46
dlls/gdiplus/graphics.c
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@ -317,7 +317,8 @@ custend:
}
/* Shortens the line by the given percent by changing x2, y2.
* If percent is > 1.0 then the line will change direction. */
* If percent is > 1.0 then the line will change direction.
* If percent is negative it can lengthen the line. */
static void shorten_line_percent(REAL x1, REAL y1, REAL *x2, REAL *y2, REAL percent)
{
REAL dist, theta, dx, dy;
@ -325,17 +326,18 @@ static void shorten_line_percent(REAL x1, REAL y1, REAL *x2, REAL *y2, REAL per
if((y1 == *y2) && (x1 == *x2))
return;
dist = sqrt((*x2 - x1) * (*x2 - x1) + (*y2 - y1) * (*y2 - y1)) * percent;
theta = (*x2 == x1 ? M_PI_2 : atan((*y2 - y1) / (*x2 - x1)));
dist = sqrt((*x2 - x1) * (*x2 - x1) + (*y2 - y1) * (*y2 - y1)) * -percent;
theta = (*x2 == x1 ? M_PI_2 : atan2((*y2 - y1), (*x2 - x1)));
dx = cos(theta) * dist;
dy = sin(theta) * dist;
*x2 = *x2 + fabs(dx) * (*x2 > x1 ? -1.0 : 1.0);
*y2 = *y2 + fabs(dy) * (*y2 > y1 ? -1.0 : 1.0);
*x2 = *x2 + dx;
*y2 = *y2 + dy;
}
/* Shortens the line by the given amount by changing x2, y2.
* If the amount is greater than the distance, the line will become length 0. */
* If the amount is greater than the distance, the line will become length 0.
* If the amount is negative, it can lengthen the line. */
static void shorten_line_amt(REAL x1, REAL y1, REAL *x2, REAL *y2, REAL amt)
{
REAL dx, dy, percent;
@ -378,6 +380,9 @@ static GpStatus draw_polyline(HDC hdc, GpPen *pen, GDIPCONST GpPointF * pt,
if(caps){
if(pen->endcap == LineCapArrowAnchor)
shorten_line_amt(pt[count-2].X, pt[count-2].Y, &x, &y, pen->width);
else if((pen->endcap == LineCapCustom) && pen->customend)
shorten_line_amt(pt[count-2].X, pt[count-2].Y, &x, &y,
pen->customend->inset * pen->width);
draw_cap(hdc, pen->color, pen->endcap, pen->width, pen->customend,
pt[count-2].X, pt[count-2].Y, pt[count - 1].X, pt[count - 1].Y);
@ -437,9 +442,10 @@ static void shorten_bezier_amt(GpPointF * pt, REAL amt)
static GpStatus draw_polybezier(HDC hdc, GpPen *pen, GDIPCONST GpPointF * pt,
INT count, BOOL caps)
{
POINT *pti;
POINT *pti, curpos;
GpPointF *ptf;
INT i;
REAL x, y;
GpStatus status = GenericError;
if(!count)
@ -458,6 +464,18 @@ static GpStatus draw_polybezier(HDC hdc, GpPen *pen, GDIPCONST GpPointF * pt,
if(caps){
if(pen->endcap == LineCapArrowAnchor)
shorten_bezier_amt(ptf, pen->width);
/* FIXME The following is seemingly correct only for baseinset < 0 or
* baseinset > ~3. With smaller baseinsets, windows actually
* lengthens the bezier line instead of shortening it. */
else if((pen->endcap == LineCapCustom) && pen->customend){
x = pt[count - 1].X;
y = pt[count - 1].Y;
shorten_line_amt(pt[count - 2].X, pt[count - 2].Y, &x, &y,
pen->width * pen->customend->inset);
MoveToEx(hdc, roundr(pt[count - 1].X), roundr(pt[count - 1].Y), &curpos);
LineTo(hdc, roundr(x), roundr(y));
MoveToEx(hdc, curpos.x, curpos.y, NULL);
}
/* the direction of the line cap is parallel to the direction at the
* end of the bezier (which, if it has been shortened, is not the same
@ -492,7 +510,7 @@ end:
static GpStatus draw_poly(HDC hdc, GpPen *pen, GDIPCONST GpPointF * pt,
GDIPCONST BYTE * types, INT count, BOOL caps)
{
POINT *pti = GdipAlloc(count * sizeof(POINT));
POINT *pti = GdipAlloc(count * sizeof(POINT)), curpos;
BYTE *tp = GdipAlloc(count);
GpPointF *ptf = NULL;
REAL x = pt[count - 1].X, y = pt[count - 1].Y;
@ -538,6 +556,15 @@ static GpStatus draw_poly(HDC hdc, GpPen *pen, GDIPCONST GpPointF * pt,
if(pen->endcap == LineCapArrowAnchor)
shorten_bezier_amt(ptf, pen->width);
else if((pen->endcap == LineCapCustom) && pen->customend){
x = pt[count - 1].X;
y = pt[count - 1].Y;
shorten_line_amt(pt[count - 2].X, pt[count - 2].Y, &x, &y,
pen->width * pen->customend->inset);
MoveToEx(hdc, roundr(pt[count - 1].X), roundr(pt[count - 1].Y), &curpos);
LineTo(hdc, roundr(x), roundr(y));
MoveToEx(hdc, curpos.x, curpos.y, NULL);
}
draw_cap(hdc, pen->color, pen->endcap, pen->width, pen->customend,
pt[count - 1].X - (ptf[3].X - ptf[2].X),
@ -555,6 +582,9 @@ static GpStatus draw_poly(HDC hdc, GpPen *pen, GDIPCONST GpPointF * pt,
if(pen->endcap == LineCapArrowAnchor)
shorten_line_amt(pt[count - 2].X, pt[count - 2].Y, &x, &y,
pen->width);
else if((pen->endcap == LineCapCustom) && pen->customend)
shorten_line_amt(pt[count - 2].X, pt[count - 2].Y, &x, &y,
pen->customend->inset * pen->width);
draw_cap(hdc, pen->color, pen->endcap, pen->width, pen->customend,
pt[count - 2].X, pt[count - 2].Y, pt[count - 1].X,