+++ /dev/null
-/* Libart_LGPL - library of basic graphic primitives
- * Copyright (C) 1998 Raph Levien
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#include <math.h>
-#include "art_misc.h"
-#include "art_rect.h"
-
-#ifndef MAX
-#define MAX(a, b) (((a) > (b)) ? (a) : (b))
-#endif /* MAX */
-
-#ifndef MIN
-#define MIN(a, b) (((a) < (b)) ? (a) : (b))
-#endif /* MIN */
-
-/* rectangle primitives stolen from gzilla */
-
-/**
- * art_irect_copy: Make a copy of an integer rectangle.
- * @dest: Where the copy is stored.
- * @src: The source rectangle.
- *
- * Copies the rectangle.
- **/
-void
-art_irect_copy (ArtIRect *dest, const ArtIRect *src) {
- dest->x0 = src->x0;
- dest->y0 = src->y0;
- dest->x1 = src->x1;
- dest->y1 = src->y1;
-}
-
-/**
- * art_irect_union: Find union of two integer rectangles.
- * @dest: Where the result is stored.
- * @src1: A source rectangle.
- * @src2: Another source rectangle.
- *
- * Finds the smallest rectangle that includes @src1 and @src2.
- **/
-void
-art_irect_union (ArtIRect *dest, const ArtIRect *src1, const ArtIRect *src2) {
- if (art_irect_empty (src1)) {
- art_irect_copy (dest, src2);
- } else if (art_irect_empty (src2)) {
- art_irect_copy (dest, src1);
- } else {
- dest->x0 = MIN (src1->x0, src2->x0);
- dest->y0 = MIN (src1->y0, src2->y0);
- dest->x1 = MAX (src1->x1, src2->x1);
- dest->y1 = MAX (src1->y1, src2->y1);
- }
-}
-
-/**
- * art_irect_intersection: Find intersection of two integer rectangles.
- * @dest: Where the result is stored.
- * @src1: A source rectangle.
- * @src2: Another source rectangle.
- *
- * Finds the intersection of @src1 and @src2.
- **/
-void
-art_irect_intersect (ArtIRect *dest, const ArtIRect *src1, const ArtIRect *src2) {
- dest->x0 = MAX (src1->x0, src2->x0);
- dest->y0 = MAX (src1->y0, src2->y0);
- dest->x1 = MIN (src1->x1, src2->x1);
- dest->y1 = MIN (src1->y1, src2->y1);
-}
-
-/**
- * art_irect_empty: Determine whether integer rectangle is empty.
- * @src: The source rectangle.
- *
- * Return value: TRUE if @src is an empty rectangle, FALSE otherwise.
- **/
-int
-art_irect_empty (const ArtIRect *src) {
- return (src->x1 <= src->x0 || src->y1 <= src->y0);
-}
-
-#if 0
-gboolean irect_point_inside (ArtIRect *rect, GzwPoint *point) {
- return (point->x >= rect->x0 && point->y >= rect->y0 &&
- point->x < rect->x1 && point->y < rect->y1);
-}
-#endif
-
-/**
- * art_drect_copy: Make a copy of a rectangle.
- * @dest: Where the copy is stored.
- * @src: The source rectangle.
- *
- * Copies the rectangle.
- **/
-void
-art_drect_copy (ArtDRect *dest, const ArtDRect *src) {
- dest->x0 = src->x0;
- dest->y0 = src->y0;
- dest->x1 = src->x1;
- dest->y1 = src->y1;
-}
-
-/**
- * art_drect_union: Find union of two rectangles.
- * @dest: Where the result is stored.
- * @src1: A source rectangle.
- * @src2: Another source rectangle.
- *
- * Finds the smallest rectangle that includes @src1 and @src2.
- **/
-void
-art_drect_union (ArtDRect *dest, const ArtDRect *src1, const ArtDRect *src2) {
- if (art_drect_empty (src1)) {
- art_drect_copy (dest, src2);
- } else if (art_drect_empty (src2)) {
- art_drect_copy (dest, src1);
- } else {
- dest->x0 = MIN (src1->x0, src2->x0);
- dest->y0 = MIN (src1->y0, src2->y0);
- dest->x1 = MAX (src1->x1, src2->x1);
- dest->y1 = MAX (src1->y1, src2->y1);
- }
-}
-
-/**
- * art_drect_intersection: Find intersection of two rectangles.
- * @dest: Where the result is stored.
- * @src1: A source rectangle.
- * @src2: Another source rectangle.
- *
- * Finds the intersection of @src1 and @src2.
- **/
-void
-art_drect_intersect (ArtDRect *dest, const ArtDRect *src1, const ArtDRect *src2) {
- dest->x0 = MAX (src1->x0, src2->x0);
- dest->y0 = MAX (src1->y0, src2->y0);
- dest->x1 = MIN (src1->x1, src2->x1);
- dest->y1 = MIN (src1->y1, src2->y1);
-}
-
-/**
- * art_irect_empty: Determine whether rectangle is empty.
- * @src: The source rectangle.
- *
- * Return value: TRUE if @src is an empty rectangle, FALSE otherwise.
- **/
-int
-art_drect_empty (const ArtDRect *src) {
- return (src->x1 <= src->x0 || src->y1 <= src->y0);
-}
-
-/**
- * art_drect_affine_transform: Affine transform rectangle.
- * @dst: Where to store the result.
- * @src: The source rectangle.
- * @matrix: The affine transformation.
- *
- * Find the smallest rectangle enclosing the affine transformed @src.
- * The result is exactly the affine transformation of @src when
- * @matrix specifies a rectilinear affine transformation, otherwise it
- * is a conservative approximation.
- **/
-void
-art_drect_affine_transform (ArtDRect *dst, const ArtDRect *src, const double matrix[6])
-{
- double x00, y00, x10, y10;
- double x01, y01, x11, y11;
-
- x00 = src->x0 * matrix[0] + src->y0 * matrix[2] + matrix[4];
- y00 = src->x0 * matrix[1] + src->y0 * matrix[3] + matrix[5];
- x10 = src->x1 * matrix[0] + src->y0 * matrix[2] + matrix[4];
- y10 = src->x1 * matrix[1] + src->y0 * matrix[3] + matrix[5];
- x01 = src->x0 * matrix[0] + src->y1 * matrix[2] + matrix[4];
- y01 = src->x0 * matrix[1] + src->y1 * matrix[3] + matrix[5];
- x11 = src->x1 * matrix[0] + src->y1 * matrix[2] + matrix[4];
- y11 = src->x1 * matrix[1] + src->y1 * matrix[3] + matrix[5];
- dst->x0 = MIN (MIN (x00, x10), MIN (x01, x11));
- dst->y0 = MIN (MIN (y00, y10), MIN (y01, y11));
- dst->x1 = MAX (MAX (x00, x10), MAX (x01, x11));
- dst->y1 = MAX (MAX (y00, y10), MAX (y01, y11));
-}
-
-/**
- * art_drect_to_irect: Convert rectangle to integer rectangle.
- * @dst: Where to store resulting integer rectangle.
- * @src: The source rectangle.
- *
- * Find the smallest integer rectangle that encloses @src.
- **/
-void
-art_drect_to_irect (ArtIRect *dst, ArtDRect *src)
-{
- dst->x0 = floor (src->x0);
- dst->y0 = floor (src->y0);
- dst->x1 = ceil (src->x1);
- dst->y1 = ceil (src->y1);
-}
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