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gdiplus/font: Avoid computation overflow and underflow by using hypotf.

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Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=45122
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Bartosz Kosiorek 2023-11-24 21:22:47 +01:00 committed by Alexandre Julliard
parent 08653cf368
commit 1848fd3375
1 changed files with 9 additions and 14 deletions
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23
dlls/gdiplus/graphics.c
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@ -274,7 +274,7 @@ static INT prepare_dc(GpGraphics *graphics, GpPen *pen)
scale_x = graphics->worldtrans.matrix[0] + graphics->worldtrans.matrix[2];
scale_y = graphics->worldtrans.matrix[1] + graphics->worldtrans.matrix[3];
width = sqrt(scale_x * scale_x + scale_y * scale_y) / sqrt(2.0);
width = hypotf(scale_x, scale_y) / sqrt(2.0);
width *= units_to_pixels(pen->width, pen->unit == UnitWorld ? graphics->unit : pen->unit,
graphics->xres, graphics->printer_display);
@ -285,8 +285,7 @@ static INT prepare_dc(GpGraphics *graphics, GpPen *pen)
pt[1].X = 1.0;
pt[1].Y = 1.0;
gdip_transform_points(graphics, WineCoordinateSpaceGdiDevice, CoordinateSpaceDevice, pt, 2);
width *= sqrt((pt[1].X - pt[0].X) * (pt[1].X - pt[0].X) +
(pt[1].Y - pt[0].Y) * (pt[1].Y - pt[0].Y)) / sqrt(2.0);
width *= hypotf(pt[1].X - pt[0].X, pt[1].Y - pt[0].Y) / sqrt(2.0);
}
if(pen->dash == DashStyleCustom){
@ -1844,7 +1843,7 @@ 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;
dist = hypotf(*x2 - x1, *y2 - y1) * -percent;
theta = gdiplus_atan2((*y2 - y1), (*x2 - x1));
dx = cos(theta) * dist;
dy = sin(theta) * dist;
@ -1865,7 +1864,7 @@ static void shorten_line_amt(REAL x1, REAL y1, REAL *x2, REAL *y2, REAL amt)
if(dx == 0 && dy == 0)
return;
percent = amt / sqrt(dx * dx + dy * dy);
percent = amt / hypotf(dx, dy);
if(percent >= 1.0){
*x2 = x1;
*y2 = y1;
@ -1913,7 +1912,7 @@ static void shorten_bezier_amt(GpPointF * pt, REAL amt, BOOL rev)
dx = pt[fourth].X - origx;
dy = pt[fourth].Y - origy;
diff = sqrt(dx * dx + dy * dy);
diff = hypotf(dx, dy);
percent += 0.0005 * amt;
}
}
@ -5372,11 +5371,9 @@ void transform_properties(GpGraphics *graphics, GDIPCONST GpMatrix *matrix, BOOL
gdip_transform_points(graphics, WineCoordinateSpaceGdiDevice, CoordinateSpaceWorld, pt, 3);
if (rel_width)
*rel_width = sqrt((pt[1].Y-pt[0].Y)*(pt[1].Y-pt[0].Y)+
(pt[1].X-pt[0].X)*(pt[1].X-pt[0].X));
*rel_width = hypotf(pt[1].Y - pt[0].Y, pt[1].X - pt[0].X);
if (rel_height)
*rel_height = sqrt((pt[2].Y-pt[0].Y)*(pt[2].Y-pt[0].Y)+
(pt[2].X-pt[0].X)*(pt[2].X-pt[0].X));
*rel_height = hypotf(pt[2].Y - pt[0].Y, pt[2].X - pt[0].X);
if (angle)
*angle = -gdiplus_atan2((pt[1].Y - pt[0].Y), (pt[1].X - pt[0].X));
}
@ -7110,10 +7107,8 @@ GpStatus WINGDIPAPI GdipMeasureDriverString(GpGraphics *graphics, GDIPCONST UINT
GdipTransformMatrixPoints(&xform, pt, 3);
}
gdip_transform_points(graphics, WineCoordinateSpaceGdiDevice, CoordinateSpaceWorld, pt, 3);
rel_width = sqrt((pt[1].Y-pt[0].Y)*(pt[1].Y-pt[0].Y)+
(pt[1].X-pt[0].X)*(pt[1].X-pt[0].X));
rel_height = sqrt((pt[2].Y-pt[0].Y)*(pt[2].Y-pt[0].Y)+
(pt[2].X-pt[0].X)*(pt[2].X-pt[0].X));
rel_width = hypotf(pt[1].Y - pt[0].Y, pt[1].X - pt[0].X);
rel_height = hypotf(pt[2].Y - pt[0].Y, pt[2].X - pt[0].X);
if (flags & DriverStringOptionsCmapLookup)
{