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| gboolean | cdk_rectangle_intersect () |
| void | cdk_rectangle_union () |
| gboolean | cdk_rectangle_equal () |
CDK provides the CdkPoint and CdkRectangle data types for representing pixels and sets of pixels on the screen. Together with Cairo’s cairo_region_t data type, they make up the central types for representing graphical data.
A CdkPoint represents an x and y coordinate of a point.
A CdkRectangle represents the position and size of a rectangle.
The intersection of two rectangles can be computed with
cdk_rectangle_intersect(). To find the union of two rectangles use
cdk_rectangle_union().
cairo_region_t is usually used for managing clipping of graphical operations.
gboolean cdk_rectangle_intersect (const CdkRectangle *src1,const CdkRectangle *src2,CdkRectangle *dest);
Calculates the intersection of two rectangles. It is allowed for
dest
to be the same as either src1
or src2
. If the rectangles
do not intersect, dest
’s width and height is set to 0 and its x
and y values are undefined. If you are only interested in whether
the rectangles intersect, but not in the intersecting area itself,
pass NULL for dest
.
void cdk_rectangle_union (const CdkRectangle *src1,const CdkRectangle *src2,CdkRectangle *dest);
Calculates the union of two rectangles.
The union of rectangles src1
and src2
is the smallest rectangle which
includes both src1
and src2
within it.
It is allowed for dest
to be the same as either src1
or src2
.
Note that this function does not ignore 'empty' rectangles (ie. with zero width or height).
gboolean cdk_rectangle_equal (const CdkRectangle *rect1,const CdkRectangle *rect2);
Checks if the two given rectangles are equal.
Since: 3.20