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#ifndef UTIL_BOX_INLINES_H
#define UTIL_BOX_INLINES_H
#include "pipe/p_state.h"
#include "util/u_math.h"
static inline void
u_box_1d(unsigned x, unsigned w, struct pipe_box *box)
{
box->x = x;
box->y = 0;
box->z = 0;
box->width = w;
box->height = 1;
box->depth = 1;
}
static inline void
u_box_2d(unsigned x,unsigned y, unsigned w, unsigned h, struct pipe_box *box)
{
box->x = x;
box->y = y;
box->z = 0;
box->width = w;
box->height = h;
box->depth = 1;
}
static inline void
u_box_origin_2d(unsigned w, unsigned h, struct pipe_box *box)
{
box->x = 0;
box->y = 0;
box->z = 0;
box->width = w;
box->height = h;
box->depth = 1;
}
static inline void
u_box_2d_zslice(unsigned x, unsigned y, unsigned z,
unsigned w, unsigned h, struct pipe_box *box)
{
box->x = x;
box->y = y;
box->z = z;
box->width = w;
box->height = h;
box->depth = 1;
}
static inline void
u_box_3d(unsigned x, unsigned y, unsigned z,
unsigned w, unsigned h, unsigned d,
struct pipe_box *box)
{
box->x = x;
box->y = y;
box->z = z;
box->width = w;
box->height = h;
box->depth = d;
}
/* Clips @dst to width @w and height @h.
* Returns -1 if the resulting box would be empty (then @dst is left unchanged).
* 0 if nothing has been reduced.
* 1 if width has been reduced.
* 2 if height has been reduced.
* 3 if both width and height have been reduced.
* Aliasing permitted.
*/
static inline int
u_box_clip_2d(struct pipe_box *dst,
const struct pipe_box *box, int w, int h)
{
unsigned i;
int a[2], b[2], dim[2];
int *start, *end;
int res = 0;
if (!box->width || !box->height)
return -1;
dim[0] = w;
dim[1] = h;
a[0] = box->x;
a[1] = box->y;
b[0] = box->x + box->width;
b[1] = box->y + box->height;
for (i = 0; i < 2; ++i) {
start = (a[i] <= b[i]) ? &a[i] : &b[i];
end = (a[i] <= b[i]) ? &b[i] : &a[i];
if (*end < 0 || *start >= dim[i])
return -1;
if (*start < 0) {
*start = 0;
res |= (1 << i);
}
if (*end > dim[i]) {
*end = dim[i];
res |= (1 << i);
}
}
if (res) {
dst->x = a[0];
dst->y = a[1];
dst->width = b[0] - a[0];
dst->height = b[1] - a[1];
}
return res;
}
static inline int64_t
u_box_volume_3d(const struct pipe_box *box)
{
return (int64_t)box->width * box->height * box->depth;
}
/* Aliasing of @dst permitted. */
static inline void
u_box_union_2d(struct pipe_box *dst,
const struct pipe_box *a, const struct pipe_box *b)
{
int x, y;
x = MIN2(a->x, b->x);
y = MIN2(a->y, b->y);
dst->width = MAX2(a->x + a->width, b->x + b->width) - x;
dst->height = MAX2(a->y + a->height, b->y + b->height) - y;
dst->x = x;
dst->y = y;
}
/* Aliasing of @dst permitted. */
static inline void
u_box_union_3d(struct pipe_box *dst,
const struct pipe_box *a, const struct pipe_box *b)
{
int x, y, z;
x = MIN2(a->x, b->x);
y = MIN2(a->y, b->y);
z = MIN2(a->z, b->z);
dst->width = MAX2(a->x + a->width, b->x + b->width) - x;
dst->height = MAX2(a->y + a->height, b->y + b->height) - y;
dst->depth = MAX2(a->z + a->depth, b->z + b->depth) - z;
dst->x = x;
dst->y = y;
dst->z = z;
}
static inline boolean
u_box_test_intersection_2d(const struct pipe_box *a,
const struct pipe_box *b)
{
unsigned i;
int a_l[2], a_r[2], b_l[2], b_r[2];
a_l[0] = MIN2(a->x, a->x + a->width);
a_r[0] = MAX2(a->x, a->x + a->width);
a_l[1] = MIN2(a->y, a->y + a->height);
a_r[1] = MAX2(a->y, a->y + a->height);
b_l[0] = MIN2(b->x, b->x + b->width);
b_r[0] = MAX2(b->x, b->x + b->width);
b_l[1] = MIN2(b->y, b->y + b->height);
b_r[1] = MAX2(b->y, b->y + b->height);
for (i = 0; i < 2; ++i) {
if (a_l[i] > b_r[i] || a_r[i] < b_l[i])
return FALSE;
}
return TRUE;
}
static inline void
u_box_minify_2d(struct pipe_box *dst,
const struct pipe_box *src, unsigned l)
{
dst->x = src->x >> l;
dst->y = src->y >> l;
dst->width = MAX2(src->width >> l, 1);
dst->height = MAX2(src->height >> l, 1);
}
static inline void
u_box_minify_3d(struct pipe_box *dst,
const struct pipe_box *src, unsigned l)
{
dst->x = src->x >> l;
dst->y = src->y >> l;
dst->z = src->z >> l;
dst->width = MAX2(src->width >> l, 1);
dst->height = MAX2(src->height >> l, 1);
dst->depth = MAX2(src->depth >> l, 1);
}
#endif
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