rect.h File Reference

#include <stdint.h>
#include <sys/math.h>

Go to the source code of this file.

Data Structures
struct	rect_t
struct	rect_subtract_t

Macros
#define	RECT_INIT(left, top, right, bottom)
#define	RECT_INIT_DIM(x, y, width, height)
#define	RECT_WIDTH(rect)   ((rect)->right - (rect)->left)
#define	RECT_HEIGHT(rect)   ((rect)->bottom - (rect)->top)
#define	RECT_AREA(rect)   (RECT_WIDTH(rect) * RECT_HEIGHT(rect))
#define	RECT_HAS_NEGATIVE_DIMS(rect)   (RECT_WIDTH(rect) < 0 || RECT_HEIGHT(rect) < 0)
#define	RECT_EXPAND_TO_CONTAIN(rect, other)
#define	RECT_EQUAL(rect, other)
#define	RECT_CONTAINS(rect, other)
#define	RECT_CONTAINS_POINT(rect, point)
#define	RECT_OVERLAP(rect, other)
#define	RECT_OVERLAP_STRICT(rect, other)
#define	RECT_FIT(rect, parent)
#define	RECT_SHRINK(rect, margin)
#define	RECT_EXPAND(rect, margin)
#define	RECT_SUBTRACT(result, rect, other)
#define	RECT_INTERSECT(dest, src1, src2)

Macro Definition Documentation

RECT_AREA

#define RECT_AREA

(

rect

)

(RECT_WIDTH(rect) * RECT_HEIGHT(rect))

Definition at line 40 of file rect.h.

RECT_CONTAINS

#define RECT_CONTAINS	(		rect,
			other
	)

Value:

    ((rect)->left <= (rect)->right && (rect)->top <= (rect)->bottom && (other)->left <= (other)->right && \
        (other)->top <= (other)->bottom && (other)->left >= (rect)->left && (other)->right <= (rect)->right && \
        (other)->top >= (rect)->top && (other)->bottom <= (rect)->bottom)

Definition at line 56 of file rect.h.

RECT_CONTAINS_POINT

#define RECT_CONTAINS_POINT	(		rect,
			point
	)

Value:

    ((point)->x >= (rect)->left && (point)->x < (rect)->right && (point)->y >= (rect)->top && \
        (point)->y < (rect)->bottom)

Definition at line 61 of file rect.h.

RECT_EQUAL

#define RECT_EQUAL	(		rect,
			other
	)

Value:

    ((other)->left == (rect)->left && (other)->right == (rect)->right && (other)->top == (rect)->top && \
        (other)->bottom == (rect)->bottom)

Definition at line 52 of file rect.h.

RECT_EXPAND

#define RECT_EXPAND	(		rect,
			margin
	)

Value:

    ({ \
        (rect)->left -= margin; \
        (rect)->top -= margin; \
        (rect)->right += margin; \
        (rect)->bottom += margin; \
    })

Definition at line 89 of file rect.h.

RECT_EXPAND_TO_CONTAIN

#define RECT_EXPAND_TO_CONTAIN	(		rect,
			other
	)

Value:

    ({ \
        (rect)->left = MIN((rect)->left, (other)->left); \
        (rect)->top = MIN((rect)->top, (other)->top); \
        (rect)->right = MAX((rect)->right, (other)->right); \
        (rect)->bottom = MAX((rect)->bottom, (other)->bottom); \
    })

Definition at line 44 of file rect.h.

RECT_FIT

#define RECT_FIT	(		rect,
			parent
	)

Value:

    ({ \
        (rect)->left = CLAMP((rect)->left, (parent)->left, (parent)->right); \
        (rect)->top = CLAMP((rect)->top, (parent)->top, (parent)->bottom); \
        (rect)->right = CLAMP((rect)->right, (parent)->left, (parent)->right); \
        (rect)->bottom = CLAMP((rect)->bottom, (parent)->top, (parent)->bottom); \
    })

Definition at line 73 of file rect.h.

RECT_HAS_NEGATIVE_DIMS

#define RECT_HAS_NEGATIVE_DIMS

(

rect

)

(RECT_WIDTH(rect) < 0 || RECT_HEIGHT(rect) < 0)

Definition at line 42 of file rect.h.

RECT_HEIGHT

#define RECT_HEIGHT

(

rect

)

((rect)->bottom - (rect)->top)

Definition at line 39 of file rect.h.

RECT_INIT

#define RECT_INIT	(		left,
			top,
			right,
			bottom
	)

Value:

    (rect_t) \
    { \
        left, top, right, bottom, \
    }

Definition at line 26 of file rect.h.

RECT_INIT_DIM

#define RECT_INIT_DIM	(		x,
			y,
			width,
			height
	)

Value:

    (rect_t) \
    { \
        (x), (y), (x) + (width), (y) + (height), \
    }

Definition at line 32 of file rect.h.

RECT_INTERSECT

#define RECT_INTERSECT	(		dest,
			src1,
			src2
	)

Value:

    ({ \
        (dest)->left = MAX((src1)->left, (src2)->left); \
        (dest)->top = MAX((src1)->top, (src2)->top); \
        (dest)->right = MIN((src1)->right, (src2)->right); \
        (dest)->bottom = MIN((src1)->bottom, (src2)->bottom); \
    })

Definition at line 129 of file rect.h.

RECT_OVERLAP

#define RECT_OVERLAP	(		rect,
			other
	)

Value:

    (!((rect)->right <= (other)->left || (rect)->left >= (other)->right || (rect)->bottom <= (other)->top || \
        (rect)->top >= (other)->bottom))

Definition at line 65 of file rect.h.

RECT_OVERLAP_STRICT

#define RECT_OVERLAP_STRICT	(		rect,
			other
	)

Value:

    (!((rect)->right < (other)->left || (rect)->left > (other)->right || (rect)->bottom < (other)->top || \
        (rect)->top > (other)->bottom))

Definition at line 69 of file rect.h.

RECT_SHRINK

#define RECT_SHRINK	(		rect,
			margin
	)

Value:

    ({ \
        (rect)->left += margin; \
        (rect)->top += margin; \
        (rect)->right -= margin; \
        (rect)->bottom -= margin; \
    })

Definition at line 81 of file rect.h.

RECT_SUBTRACT

#define RECT_SUBTRACT	(		result,
			rect,
			other
	)

Value:

    ({ \
        rect_subtract_t res = {.count = 0}; \
        if (!RECT_OVERLAP(rect, other)) \
        { \
            res.rects[0] = *(rect); \
            res.count = 1; \
        } \
        else \
        { \
            if ((other)->top > (rect)->top) \
            { \
                res.rects[res.count++] = (rect_t){(rect)->left, (rect)->top, (rect)->right, (other)->top}; \
            } \
            if ((other)->bottom < (rect)->bottom) \
            { \
                res.rects[res.count++] = (rect_t){(rect)->left, (other)->bottom, (rect)->right, (rect)->bottom}; \
            } \
            if ((other)->left > (rect)->left) \
            { \
                res.rects[res.count++] = (rect_t){(rect)->left, MAX((rect)->top, (other)->top), (other)->left, \
                    MIN((rect)->bottom, (other)->bottom)}; \
            } \
            if ((other)->right < (rect)->right) \
            { \
                res.rects[res.count++] = (rect_t){(other)->right, MAX((rect)->top, (other)->top), (rect)->right, \
                    MIN((rect)->bottom, (other)->bottom)}; \
            } \
        } \
        *(result) = res; \
    })

Definition at line 97 of file rect.h.

RECT_WIDTH

#define RECT_WIDTH

(

rect

)

((rect)->right - (rect)->left)

Definition at line 38 of file rect.h.