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Fix issue 172: Ellipse overflow with large sizes on 32bit cpus.

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git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@825 416bcca6-2ee7-4201-b75f-2eb2f807beb1
This commit is contained in:
Yves Rizoud 2009-06-01 21:27:28 +00:00
parent 33bb5622c0
commit b9f9a96ce8
1 changed files with 5 additions and 5 deletions
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10
misc.c
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@ -203,17 +203,17 @@ void Replace_a_color(byte old_color, byte New_color)
void Ellipse_compute_limites(short horizontal_radius,short vertical_radius) void Ellipse_compute_limites(short horizontal_radius,short vertical_radius)
{ {
Ellipse_horizontal_radius_squared = Ellipse_horizontal_radius_squared =
horizontal_radius * horizontal_radius; (long)horizontal_radius * horizontal_radius;
Ellipse_vertical_radius_squared = Ellipse_vertical_radius_squared =
vertical_radius * vertical_radius; (long)vertical_radius * vertical_radius;
Ellipse_limit = Ellipse_horizontal_radius_squared * Ellipse_vertical_radius_squared; Ellipse_limit = (qword)Ellipse_horizontal_radius_squared * Ellipse_vertical_radius_squared;
} }
// FIXME: move to graph.c, it's the only caller // FIXME: move to graph.c, it's the only caller
byte Pixel_in_ellipse(void) byte Pixel_in_ellipse(void)
{ {
qword ediesi = Ellipse_cursor_X * Ellipse_cursor_X * Ellipse_vertical_radius_squared + qword ediesi = (qword)Ellipse_cursor_X * Ellipse_cursor_X * Ellipse_vertical_radius_squared +
Ellipse_cursor_Y * Ellipse_cursor_Y * Ellipse_horizontal_radius_squared; (qword)Ellipse_cursor_Y * Ellipse_cursor_Y * Ellipse_horizontal_radius_squared;
if((ediesi) <= Ellipse_limit) return 255; if((ediesi) <= Ellipse_limit) return 255;
return 0; return 0;