diff options
| -rw-r--r-- | src/gallium/auxiliary/util/u_rect.h | 57 |
1 files changed, 53 insertions, 4 deletions
diff --git a/src/gallium/auxiliary/util/u_rect.h b/src/gallium/auxiliary/util/u_rect.h index deb00cc80cd..4cb90d3c316 100644 --- a/src/gallium/auxiliary/util/u_rect.h +++ b/src/gallium/auxiliary/util/u_rect.h @@ -26,19 +26,68 @@ **************************************************************************/ -/** - * Pipe copy/fill rect helpers. +#ifndef U_RECT_H +#define U_RECT_H + +#include "pipe/p_compiler.h" + +struct u_rect { + int x0, x1; + int y0, y1; +}; + +/* Do two rectangles intersect? */ +static INLINE boolean +u_rect_test_intersection(const struct u_rect *a, + const struct u_rect *b) +{ + return (!(a->x1 < b->x0 || + b->x1 < a->x0 || + a->y1 < b->y0 || + b->y1 < a->y0)); +} +/* Find the intersection of two rectangles known to intersect. + */ +static INLINE void +u_rect_find_intersection(const struct u_rect *a, + struct u_rect *b) +{ + /* Caller should verify intersection exists before calling. + */ + if (b->x0 < a->x0) b->x0 = a->x0; + if (b->x1 > a->x1) b->x1 = a->x1; + if (b->y0 < a->y0) b->y0 = a->y0; + if (b->y1 > a->y1) b->y1 = a->y1; +} -#ifndef U_RECT_H -#define U_RECT_H +static INLINE void +u_rect_possible_intersection(const struct u_rect *a, + struct u_rect *b) +{ + if (u_rect_test_intersection(a,b)) { + u_rect_find_intersection(a,b); + } + else { + b->x0 = b->x1 = b->y0 = b->y1 = 0; + } +} #include "pipe/p_format.h" #include "util/u_pack_color.h" + +/********************************************************************** + * Pipe copy/fill rect helpers. + */ + +/* These really should move to a different file: + */ +#include "pipe/p_format.h" + extern void util_copy_rect(ubyte * dst, enum pipe_format format, unsigned dst_stride, unsigned dst_x, unsigned dst_y, |