diff options
Diffstat (limited to 'src/cairo-path-fixed.c')
-rw-r--r-- | src/cairo-path-fixed.c | 553 |
1 files changed, 274 insertions, 279 deletions
diff --git a/src/cairo-path-fixed.c b/src/cairo-path-fixed.c index eea8630..e3e273b 100644 --- a/src/cairo-path-fixed.c +++ b/src/cairo-path-fixed.c @@ -38,6 +38,7 @@ #include "cairoint.h" +#include "cairo-box-private.h" #include "cairo-error-private.h" #include "cairo-path-fixed-private.h" #include "cairo-slope-private.h" @@ -97,15 +98,18 @@ _cairo_path_fixed_init (cairo_path_fixed_t *path) path->current_point.x = 0; path->current_point.y = 0; path->last_move_point = path->current_point; - path->has_last_move_point = FALSE; + path->has_current_point = FALSE; + path->needs_move_to = TRUE; + path->has_extents = FALSE; path->has_curve_to = FALSE; - path->is_rectilinear = TRUE; - path->maybe_fill_region = TRUE; - path->is_empty_fill = TRUE; + path->stroke_is_rectilinear = TRUE; + path->fill_is_rectilinear = TRUE; + path->fill_maybe_region = TRUE; + path->fill_is_empty = TRUE; - path->extents.p1.x = path->extents.p1.y = INT_MAX; - path->extents.p2.x = path->extents.p2.y = INT_MIN; + path->extents.p1.x = path->extents.p1.y = 0; + path->extents.p2.x = path->extents.p2.y = 0; } cairo_status_t @@ -126,12 +130,15 @@ _cairo_path_fixed_init_copy (cairo_path_fixed_t *path, path->current_point = other->current_point; path->last_move_point = other->last_move_point; - path->has_last_move_point = other->has_last_move_point; + path->has_current_point = other->has_current_point; + path->needs_move_to = other->needs_move_to; + path->has_extents = other->has_extents; path->has_curve_to = other->has_curve_to; - path->is_rectilinear = other->is_rectilinear; - path->maybe_fill_region = other->maybe_fill_region; - path->is_empty_fill = other->is_empty_fill; + path->stroke_is_rectilinear = other->stroke_is_rectilinear; + path->fill_is_rectilinear = other->fill_is_rectilinear; + path->fill_maybe_region = other->fill_maybe_region; + path->fill_is_empty = other->fill_is_empty; path->extents = other->extents; @@ -182,23 +189,23 @@ _cairo_path_fixed_hash (const cairo_path_fixed_t *path) { unsigned long hash = _CAIRO_HASH_INIT_VALUE; const cairo_path_buf_t *buf; - int num_points, num_ops; + unsigned int count; - hash = _cairo_hash_bytes (hash, &path->extents, sizeof (path->extents)); - - num_ops = num_points = 0; + count = 0; cairo_path_foreach_buf_start (buf, path) { hash = _cairo_hash_bytes (hash, buf->op, buf->num_ops * sizeof (buf->op[0])); + count += buf->num_ops; + } cairo_path_foreach_buf_end (buf, path); + hash = _cairo_hash_bytes (hash, &count, sizeof (count)); + + count = 0; + cairo_path_foreach_buf_start (buf, path) { hash = _cairo_hash_bytes (hash, buf->points, buf->num_points * sizeof (buf->points[0])); - - num_ops += buf->num_ops; - num_points += buf->num_points; + count += buf->num_points; } cairo_path_foreach_buf_end (buf, path); - - hash = _cairo_hash_bytes (hash, &num_ops, sizeof (num_ops)); - hash = _cairo_hash_bytes (hash, &num_points, sizeof (num_points)); + hash = _cairo_hash_bytes (hash, &count, sizeof (count)); return hash; } @@ -233,10 +240,7 @@ _cairo_path_fixed_equal (const cairo_path_fixed_t *a, return TRUE; /* use the flags to quickly differentiate based on contents */ - if (a->is_empty_fill != b->is_empty_fill || - a->has_curve_to != b->has_curve_to || - a->maybe_fill_region != b->maybe_fill_region || - a->is_rectilinear != b->is_rectilinear) + if (a->has_curve_to != b->has_curve_to) { return FALSE; } @@ -365,31 +369,43 @@ _cairo_path_fixed_destroy (cairo_path_fixed_t *path) free (path); } -static cairo_path_op_t -_cairo_path_last_op (cairo_path_fixed_t *path) +static inline cairo_path_op_t +_cairo_path_fixed_last_op (cairo_path_fixed_t *path) { cairo_path_buf_t *buf; buf = cairo_path_tail (path); - if (buf->num_ops == 0) - return -1; + assert (buf->num_ops != 0); return buf->op[buf->num_ops - 1]; } -static inline void -_cairo_path_fixed_extents_add (cairo_path_fixed_t *path, - const cairo_point_t *point) +static inline const cairo_point_t * +_cairo_path_fixed_penultimate_point (cairo_path_fixed_t *path) { - if (point->x < path->extents.p1.x) - path->extents.p1.x = point->x; - if (point->y < path->extents.p1.y) - path->extents.p1.y = point->y; - - if (point->x > path->extents.p2.x) - path->extents.p2.x = point->x; - if (point->y > path->extents.p2.y) - path->extents.p2.y = point->y; + cairo_path_buf_t *buf; + + buf = cairo_path_tail (path); + if (likely (buf->num_points >= 2)) { + return &buf->points[buf->num_points - 2]; + } else { + cairo_path_buf_t *prev_buf = cairo_path_buf_prev (buf); + + assert (prev_buf->num_points >= 2 - buf->num_points); + return &prev_buf->points[prev_buf->num_points - (2 - buf->num_points)]; + } +} + +static void +_cairo_path_fixed_drop_line_to (cairo_path_fixed_t *path) +{ + cairo_path_buf_t *buf; + + assert (_cairo_path_fixed_last_op (path) == CAIRO_PATH_OP_LINE_TO); + + buf = cairo_path_tail (path); + buf->num_points--; + buf->num_ops--; } cairo_status_t @@ -397,48 +413,54 @@ _cairo_path_fixed_move_to (cairo_path_fixed_t *path, cairo_fixed_t x, cairo_fixed_t y) { - cairo_status_t status; - cairo_point_t point; + _cairo_path_fixed_new_sub_path (path); - point.x = x; - point.y = y; + path->has_current_point = TRUE; + path->current_point.x = x; + path->current_point.y = y; + + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +_cairo_path_fixed_move_to_apply (cairo_path_fixed_t *path) +{ + if (likely (! path->needs_move_to)) + return CAIRO_STATUS_SUCCESS; - /* If the previous op was also a MOVE_TO, then just change its - * point rather than adding a new op. */ - if (_cairo_path_last_op (path) == CAIRO_PATH_OP_MOVE_TO) { - cairo_path_buf_t *buf; + path->needs_move_to = FALSE; - buf = cairo_path_tail (path); - buf->points[buf->num_points - 1] = point; + if (path->has_extents) { + _cairo_box_add_point (&path->extents, &path->current_point); } else { - status = _cairo_path_fixed_add (path, CAIRO_PATH_OP_MOVE_TO, &point, 1); - if (unlikely (status)) - return status; - - if (path->has_current_point && path->is_rectilinear) { - /* a move-to is first an implicit close */ - path->is_rectilinear = path->current_point.x == path->last_move_point.x || - path->current_point.y == path->last_move_point.y; - path->maybe_fill_region &= path->is_rectilinear; - } - if (path->maybe_fill_region) { - path->maybe_fill_region = - _cairo_fixed_is_integer (path->last_move_point.x) && - _cairo_fixed_is_integer (path->last_move_point.y); - } + _cairo_box_set (&path->extents, &path->current_point, &path->current_point); + path->has_extents = TRUE; } - path->current_point = point; - path->last_move_point = point; - path->has_last_move_point = TRUE; - path->has_current_point = TRUE; + if (path->fill_maybe_region) { + path->fill_maybe_region = _cairo_fixed_is_integer (path->current_point.x) && + _cairo_fixed_is_integer (path->current_point.y); + } - return CAIRO_STATUS_SUCCESS; + path->last_move_point = path->current_point; + + return _cairo_path_fixed_add (path, CAIRO_PATH_OP_MOVE_TO, &path->current_point, 1); } void _cairo_path_fixed_new_sub_path (cairo_path_fixed_t *path) { + if (! path->needs_move_to) { + /* If the current subpath doesn't need_move_to, it contains at least one command */ + if (path->fill_is_rectilinear) { + /* Implicitly close for fill */ + path->fill_is_rectilinear = path->current_point.x == path->last_move_point.x || + path->current_point.y == path->last_move_point.y; + path->fill_maybe_region &= path->fill_is_rectilinear; + } + path->needs_move_to = TRUE; + } + path->has_current_point = FALSE; } @@ -475,12 +497,16 @@ _cairo_path_fixed_line_to (cairo_path_fixed_t *path, if (! path->has_current_point) return _cairo_path_fixed_move_to (path, point.x, point.y); + status = _cairo_path_fixed_move_to_apply (path); + if (unlikely (status)) + return status; + /* If the previous op was but the initial MOVE_TO and this segment * is degenerate, then we can simply skip this point. Note that * a move-to followed by a degenerate line-to is a valid path for * stroking, but at all other times is simply a degenerate segment. */ - if (_cairo_path_last_op (path) != CAIRO_PATH_OP_MOVE_TO) { + if (_cairo_path_fixed_last_op (path) != CAIRO_PATH_OP_MOVE_TO) { if (x == path->current_point.x && y == path->current_point.y) return CAIRO_STATUS_SUCCESS; } @@ -488,22 +514,13 @@ _cairo_path_fixed_line_to (cairo_path_fixed_t *path, /* If the previous op was also a LINE_TO with the same gradient, * then just change its end-point rather than adding a new op. */ - if (_cairo_path_last_op (path) == CAIRO_PATH_OP_LINE_TO) { - cairo_path_buf_t *buf; + if (_cairo_path_fixed_last_op (path) == CAIRO_PATH_OP_LINE_TO) { const cairo_point_t *p; - buf = cairo_path_tail (path); - if (likely (buf->num_points >= 2)) { - p = &buf->points[buf->num_points-2]; - } else { - cairo_path_buf_t *prev_buf = cairo_path_buf_prev (buf); - p = &prev_buf->points[prev_buf->num_points - (2 - buf->num_points)]; - } - + p = _cairo_path_fixed_penultimate_point (path); if (p->x == path->current_point.x && p->y == path->current_point.y) { /* previous line element was degenerate, replace */ - buf->points[buf->num_points - 1] = point; - goto FLAGS; + _cairo_path_fixed_drop_line_to (path); } else { cairo_slope_t prev, self; @@ -513,38 +530,36 @@ _cairo_path_fixed_line_to (cairo_path_fixed_t *path, /* cannot trim anti-parallel segments whilst stroking */ ! _cairo_slope_backwards (&prev, &self)) { - buf->points[buf->num_points - 1] = point; - goto FLAGS; + _cairo_path_fixed_drop_line_to (path); + /* In this case the flags might be more restrictive than + * what we actually need. + * When changing the flags definition we should check if + * changing the line_to point can affect them. + */ } } } - status = _cairo_path_fixed_add (path, CAIRO_PATH_OP_LINE_TO, &point, 1); - if (unlikely (status)) - return status; - - FLAGS: - if (path->is_rectilinear) { - path->is_rectilinear = path->current_point.x == x || - path->current_point.y == y; - path->maybe_fill_region &= path->is_rectilinear; - } - if (path->maybe_fill_region) { - path->maybe_fill_region = _cairo_fixed_is_integer (x) && - _cairo_fixed_is_integer (y); - } - if (path->is_empty_fill) { - path->is_empty_fill = path->current_point.x == x && - path->current_point.y == y; + if (path->stroke_is_rectilinear) { + path->stroke_is_rectilinear = path->current_point.x == x || + path->current_point.y == y; + path->fill_is_rectilinear &= path->stroke_is_rectilinear; + path->fill_maybe_region &= path->fill_is_rectilinear; + if (path->fill_maybe_region) { + path->fill_maybe_region = _cairo_fixed_is_integer (x) && + _cairo_fixed_is_integer (y); + } + if (path->fill_is_empty) { + path->fill_is_empty = path->current_point.x == x && + path->current_point.y == y; + } } path->current_point = point; - if (path->has_last_move_point) { - _cairo_path_fixed_extents_add (path, &path->last_move_point); - path->has_last_move_point = FALSE; - } - _cairo_path_fixed_extents_add (path, &point); - return CAIRO_STATUS_SUCCESS; + + _cairo_box_add_point (&path->extents, &point); + + return _cairo_path_fixed_add (path, CAIRO_PATH_OP_LINE_TO, &point, 1); } cairo_status_t @@ -572,34 +587,39 @@ _cairo_path_fixed_curve_to (cairo_path_fixed_t *path, /* make sure subpaths are started properly */ if (! path->has_current_point) { status = _cairo_path_fixed_move_to (path, x0, y0); - if (unlikely (status)) - return status; + assert (status == CAIRO_STATUS_SUCCESS); + } + + status = _cairo_path_fixed_move_to_apply (path); + if (unlikely (status)) + return status; + + /* If the previous op was a degenerate LINE_TO, drop it. */ + if (_cairo_path_fixed_last_op (path) == CAIRO_PATH_OP_LINE_TO) { + const cairo_point_t *p; + + p = _cairo_path_fixed_penultimate_point (path); + if (p->x == path->current_point.x && p->y == path->current_point.y) { + /* previous line element was degenerate, replace */ + _cairo_path_fixed_drop_line_to (path); + } } point[0].x = x0; point[0].y = y0; point[1].x = x1; point[1].y = y1; point[2].x = x2; point[2].y = y2; - status = _cairo_path_fixed_add (path, CAIRO_PATH_OP_CURVE_TO, point, 3); - if (unlikely (status)) - return status; + + _cairo_box_add_curve_to (&path->extents, &path->current_point, + &point[0], &point[1], &point[2]); path->current_point = point[2]; - path->has_current_point = TRUE; - path->is_empty_fill = FALSE; path->has_curve_to = TRUE; - path->is_rectilinear = FALSE; - path->maybe_fill_region = FALSE; - - /* coarse bounds */ - if (path->has_last_move_point) { - _cairo_path_fixed_extents_add (path, &path->last_move_point); - path->has_last_move_point = FALSE; - } - _cairo_path_fixed_extents_add (path, &point[0]); - _cairo_path_fixed_extents_add (path, &point[1]); - _cairo_path_fixed_extents_add (path, &point[2]); + path->stroke_is_rectilinear = FALSE; + path->fill_is_rectilinear = FALSE; + path->fill_maybe_region = FALSE; + path->fill_is_empty = FALSE; - return CAIRO_STATUS_SUCCESS; + return _cairo_path_fixed_add (path, CAIRO_PATH_OP_CURVE_TO, point, 3); } cairo_status_t @@ -630,35 +650,28 @@ _cairo_path_fixed_close_path (cairo_path_fixed_t *path) if (! path->has_current_point) return CAIRO_STATUS_SUCCESS; - /* If the previous op was also a LINE_TO back to the start, discard it */ - if (_cairo_path_last_op (path) == CAIRO_PATH_OP_LINE_TO) { - if (path->current_point.x == path->last_move_point.x && - path->current_point.y == path->last_move_point.y) - { - cairo_path_buf_t *buf; - cairo_point_t *p; - - buf = cairo_path_tail (path); - if (likely (buf->num_points >= 2)) { - p = &buf->points[buf->num_points-2]; - } else { - cairo_path_buf_t *prev_buf = cairo_path_buf_prev (buf); - p = &prev_buf->points[prev_buf->num_points - (2 - buf->num_points)]; - } - - path->current_point = *p; - buf->num_ops--; - buf->num_points--; - } - } - - status = _cairo_path_fixed_add (path, CAIRO_PATH_OP_CLOSE_PATH, NULL, 0); + /* + * Add a line_to, to compute flags and solve any degeneracy. + * It will be removed later (if it was actually added). + */ + status = _cairo_path_fixed_line_to (path, + path->last_move_point.x, + path->last_move_point.y); if (unlikely (status)) return status; - return _cairo_path_fixed_move_to (path, - path->last_move_point.x, - path->last_move_point.y); + /* + * If the command used to close the path is a line_to, drop it. + * We must check that last command is actually a line_to, + * because the path could have been closed with a curve_to (and + * the previous line_to not added as it would be degenerate). + */ + if (_cairo_path_fixed_last_op (path) == CAIRO_PATH_OP_LINE_TO) + _cairo_path_fixed_drop_line_to (path); + + path->needs_move_to = TRUE; /* After close_path, add an implicit move_to */ + + return _cairo_path_fixed_add (path, CAIRO_PATH_OP_CLOSE_PATH, NULL, 0); } cairo_bool_t @@ -714,9 +727,20 @@ _cairo_path_fixed_add (cairo_path_fixed_t *path, } len += snprintf (buf + len, sizeof (buf), "]"); +#define STRINGIFYFLAG(x) (path->x ? #x " " : "") fprintf (stderr, - "_cairo_path_fixed_add (%s, %s)\n", - op_str[(int) op], buf); + "_cairo_path_fixed_add (%s, %s) [%s%s%s%s%s%s%s%s]\n", + op_str[(int) op], buf, + STRINGIFYFLAG(has_current_point), + STRINGIFYFLAG(needs_move_to), + STRINGIFYFLAG(has_extents), + STRINGIFYFLAG(has_curve_to), + STRINGIFYFLAG(stroke_is_rectilinear), + STRINGIFYFLAG(fill_is_rectilinear), + STRINGIFYFLAG(fill_is_empty), + STRINGIFYFLAG(fill_maybe_region) + ); +#undef STRINGIFYFLAG } _cairo_path_buf_add_op (buf, op); @@ -780,54 +804,32 @@ _cairo_path_buf_add_points (cairo_path_buf_t *buf, cairo_status_t _cairo_path_fixed_interpret (const cairo_path_fixed_t *path, - cairo_direction_t dir, cairo_path_fixed_move_to_func_t *move_to, cairo_path_fixed_line_to_func_t *line_to, cairo_path_fixed_curve_to_func_t *curve_to, cairo_path_fixed_close_path_func_t *close_path, void *closure) { - const uint8_t num_args[] = { - 1, /* cairo_path_move_to */ - 1, /* cairo_path_op_line_to */ - 3, /* cairo_path_op_curve_to */ - 0, /* cairo_path_op_close_path */ - }; + const cairo_path_buf_t *buf; cairo_status_t status; - const cairo_path_buf_t *buf, *first; - cairo_bool_t forward = (dir == CAIRO_DIRECTION_FORWARD); - int step = forward ? 1 : -1; - - buf = first = forward ? cairo_path_head (path) : cairo_path_tail (path); - do { - cairo_point_t *points; - int start, stop, i; - - if (forward) { - start = 0; - stop = buf->num_ops; - points = buf->points; - } else { - start = buf->num_ops - 1; - stop = -1; - points = buf->points + buf->num_points; - } - for (i = start; i != stop; i += step) { - cairo_path_op_t op = buf->op[i]; - - if (! forward) - points -= num_args[(int) op]; + cairo_path_foreach_buf_start (buf, path) { + const cairo_point_t *points = buf->points; + unsigned int i; - switch (op) { + for (i = 0; i < buf->num_ops; i++) { + switch (buf->op[i]) { case CAIRO_PATH_OP_MOVE_TO: status = (*move_to) (closure, &points[0]); + points += 1; break; case CAIRO_PATH_OP_LINE_TO: status = (*line_to) (closure, &points[0]); + points += 1; break; case CAIRO_PATH_OP_CURVE_TO: status = (*curve_to) (closure, &points[0], &points[1], &points[2]); + points += 3; break; default: ASSERT_NOT_REACHED; @@ -835,13 +837,11 @@ _cairo_path_fixed_interpret (const cairo_path_fixed_t *path, status = (*close_path) (closure); break; } + if (unlikely (status)) return status; - - if (forward) - points += num_args[(int) op]; } - } while ((buf = forward ? cairo_path_buf_next (buf) : cairo_path_buf_prev (buf)) != first); + } cairo_path_foreach_buf_end (buf, path); return CAIRO_STATUS_SUCCESS; } @@ -901,7 +901,6 @@ _append_close_path (void *abstract_closure) cairo_status_t _cairo_path_fixed_append (cairo_path_fixed_t *path, const cairo_path_fixed_t *other, - cairo_direction_t dir, cairo_fixed_t tx, cairo_fixed_t ty) { @@ -911,7 +910,7 @@ _cairo_path_fixed_append (cairo_path_fixed_t *path, closure.offset.x = tx; closure.offset.y = ty; - return _cairo_path_fixed_interpret (other, dir, + return _cairo_path_fixed_interpret (other, _append_move_to, _append_line_to, _append_curve_to, @@ -929,13 +928,18 @@ _cairo_path_fixed_offset_and_scale (cairo_path_fixed_t *path, cairo_path_buf_t *buf; unsigned int i; - if (path->maybe_fill_region) { - path->maybe_fill_region = _cairo_fixed_is_integer (offx) && - _cairo_fixed_is_integer (offy) && - _cairo_fixed_is_integer (scalex) && - _cairo_fixed_is_integer (scaley); + if (scalex == CAIRO_FIXED_ONE && scaley == CAIRO_FIXED_ONE) { + _cairo_path_fixed_translate (path, offx, offy); + return; } + path->last_move_point.x = _cairo_fixed_mul (scalex, path->last_move_point.x) + offx; + path->last_move_point.y = _cairo_fixed_mul (scaley, path->last_move_point.y) + offy; + path->current_point.x = _cairo_fixed_mul (scalex, path->current_point.x) + offx; + path->current_point.y = _cairo_fixed_mul (scaley, path->current_point.y) + offy; + + path->fill_maybe_region = TRUE; + cairo_path_foreach_buf_start (buf, path) { for (i = 0; i < buf->num_points; i++) { if (scalex != CAIRO_FIXED_ONE) @@ -945,12 +949,18 @@ _cairo_path_fixed_offset_and_scale (cairo_path_fixed_t *path, if (scaley != CAIRO_FIXED_ONE) buf->points[i].y = _cairo_fixed_mul (buf->points[i].y, scaley); buf->points[i].y += offy; + + if (path->fill_maybe_region) { + path->fill_maybe_region = _cairo_fixed_is_integer (buf->points[i].x) && + _cairo_fixed_is_integer (buf->points[i].y); + } } } cairo_path_foreach_buf_end (buf, path); + path->fill_maybe_region &= path->fill_is_rectilinear; + path->extents.p1.x = _cairo_fixed_mul (scalex, path->extents.p1.x) + offx; path->extents.p2.x = _cairo_fixed_mul (scalex, path->extents.p2.x) + offx; - path->extents.p1.y = _cairo_fixed_mul (scaley, path->extents.p1.y) + offy; path->extents.p2.y = _cairo_fixed_mul (scaley, path->extents.p2.y) + offy; } @@ -966,30 +976,47 @@ _cairo_path_fixed_translate (cairo_path_fixed_t *path, if (offx == 0 && offy == 0) return; - if (path->maybe_fill_region && - ! (_cairo_fixed_is_integer (offx) && _cairo_fixed_is_integer (offy))) - { - path->maybe_fill_region = FALSE; - } - path->last_move_point.x += offx; path->last_move_point.y += offy; path->current_point.x += offx; path->current_point.y += offy; + path->fill_maybe_region = TRUE; + cairo_path_foreach_buf_start (buf, path) { - for (i = 0; i < buf->num_points; i++) { - buf->points[i].x += offx; - buf->points[i].y += offy; + for (i = 0; i < buf->num_points; i++) { + buf->points[i].x += offx; + buf->points[i].y += offy; + + if (path->fill_maybe_region) { + path->fill_maybe_region = _cairo_fixed_is_integer (buf->points[i].x) && + _cairo_fixed_is_integer (buf->points[i].y); + } } } cairo_path_foreach_buf_end (buf, path); + path->fill_maybe_region &= path->fill_is_rectilinear; + path->extents.p1.x += offx; path->extents.p1.y += offy; path->extents.p2.x += offx; path->extents.p2.y += offy; } + +static inline void +_cairo_path_fixed_transform_point (cairo_point_t *p, + const cairo_matrix_t *matrix) +{ + double dx, dy; + + dx = _cairo_fixed_to_double (p->x); + dy = _cairo_fixed_to_double (p->y); + cairo_matrix_transform_point (matrix, &dx, &dy); + p->x = _cairo_fixed_from_double (dx); + p->y = _cairo_fixed_from_double (dy); +} + /** * _cairo_path_fixed_transform: * @path: a #cairo_path_fixed_t to be transformed @@ -1003,80 +1030,58 @@ void _cairo_path_fixed_transform (cairo_path_fixed_t *path, const cairo_matrix_t *matrix) { + cairo_box_t extents; + cairo_point_t point; cairo_path_buf_t *buf; unsigned int i; - double dx, dy; - - /* XXX current_point, last_move_to */ if (matrix->yx == 0.0 && matrix->xy == 0.0) { /* Fast path for the common case of scale+transform */ - if (matrix->xx == 1. && matrix->yy == 1.) { - _cairo_path_fixed_translate (path, - _cairo_fixed_from_double (matrix->x0), - _cairo_fixed_from_double (matrix->y0)); - } else { - _cairo_path_fixed_offset_and_scale (path, - _cairo_fixed_from_double (matrix->x0), - _cairo_fixed_from_double (matrix->y0), - _cairo_fixed_from_double (matrix->xx), - _cairo_fixed_from_double (matrix->yy)); - } + _cairo_path_fixed_offset_and_scale (path, + _cairo_fixed_from_double (matrix->x0), + _cairo_fixed_from_double (matrix->y0), + _cairo_fixed_from_double (matrix->xx), + _cairo_fixed_from_double (matrix->yy)); return; } - path->extents.p1.x = path->extents.p1.y = INT_MAX; - path->extents.p2.x = path->extents.p2.y = INT_MIN; - path->maybe_fill_region = FALSE; - cairo_path_foreach_buf_start (buf, path) { - for (i = 0; i < buf->num_points; i++) { - dx = _cairo_fixed_to_double (buf->points[i].x); - dy = _cairo_fixed_to_double (buf->points[i].y); + _cairo_path_fixed_transform_point (&path->last_move_point, matrix); + _cairo_path_fixed_transform_point (&path->current_point, matrix); - cairo_matrix_transform_point (matrix, &dx, &dy); + buf = cairo_path_head (path); + if (buf->num_points == 0) + return; - buf->points[i].x = _cairo_fixed_from_double (dx); - buf->points[i].y = _cairo_fixed_from_double (dy); + extents = path->extents; + point = buf->points[0]; + _cairo_path_fixed_transform_point (&point, matrix); + _cairo_box_set (&path->extents, &point, &point); - /* XXX need to eliminate surplus move-to's? */ - _cairo_path_fixed_extents_add (path, &buf->points[i]); - } + cairo_path_foreach_buf_start (buf, path) { + for (i = 0; i < buf->num_points; i++) { + _cairo_path_fixed_transform_point (&buf->points[i], matrix); + _cairo_box_add_point (&path->extents, &buf->points[i]); + } } cairo_path_foreach_buf_end (buf, path); -} -cairo_bool_t -_cairo_path_fixed_is_equal (const cairo_path_fixed_t *path, - const cairo_path_fixed_t *other) -{ - const cairo_path_buf_t *path_buf, *other_buf; - - if (path->current_point.x != other->current_point.x || - path->current_point.y != other->current_point.y || - path->has_current_point != other->has_current_point || - path->has_curve_to != other->has_curve_to || - path->is_rectilinear != other->is_rectilinear || - path->maybe_fill_region != other->maybe_fill_region || - path->last_move_point.x != other->last_move_point.x || - path->last_move_point.y != other->last_move_point.y) - { - return FALSE; - } + if (path->has_curve_to) { + cairo_bool_t is_tight; - other_buf = cairo_path_head (other); - cairo_path_foreach_buf_start (path_buf, path) { - if (path_buf->num_ops != other_buf->num_ops || - path_buf->num_points != other_buf->num_points || - memcmp (path_buf->op, other_buf->op, - sizeof (cairo_path_op_t) * path_buf->num_ops) != 0 || - memcmp (path_buf->points, other_buf->points, - sizeof (cairo_point_t) * path_buf->num_points) != 0) - { - return FALSE; + _cairo_matrix_transform_bounding_box_fixed (matrix, &extents, &is_tight); + if (!is_tight) { + cairo_bool_t has_extents; + + has_extents = _cairo_path_bounder_extents (path, &extents); + assert (has_extents); } - other_buf = cairo_path_buf_next (other_buf); - } cairo_path_foreach_buf_end (path_buf, path); + path->extents = extents; + } - return TRUE; + /* flags might become more strict than needed */ + path->stroke_is_rectilinear = FALSE; + path->fill_is_rectilinear = FALSE; + path->fill_is_empty = FALSE; + path->fill_maybe_region = FALSE; } /* Closure for path flattening */ @@ -1145,7 +1150,6 @@ _cpf_close_path (void *closure) cairo_status_t _cairo_path_fixed_interpret_flat (const cairo_path_fixed_t *path, - cairo_direction_t dir, cairo_path_fixed_move_to_func_t *move_to, cairo_path_fixed_line_to_func_t *line_to, cairo_path_fixed_close_path_func_t *close_path, @@ -1155,7 +1159,7 @@ _cairo_path_fixed_interpret_flat (const cairo_path_fixed_t *path, cpf_t flattener; if (! path->has_curve_to) { - return _cairo_path_fixed_interpret (path, dir, + return _cairo_path_fixed_interpret (path, move_to, line_to, NULL, @@ -1168,7 +1172,7 @@ _cairo_path_fixed_interpret_flat (const cairo_path_fixed_t *path, flattener.line_to = line_to; flattener.close_path = close_path; flattener.closure = closure; - return _cairo_path_fixed_interpret (path, dir, + return _cairo_path_fixed_interpret (path, _cpf_move_to, _cpf_line_to, _cpf_curve_to, @@ -1207,7 +1211,7 @@ _cairo_path_fixed_is_box (const cairo_path_fixed_t *path, { const cairo_path_buf_t *buf = cairo_path_head (path); - if (! path->is_rectilinear) + if (! path->fill_is_rectilinear) return FALSE; /* Do we have the right number of ops? */ @@ -1411,14 +1415,5 @@ _cairo_path_fixed_iter_at_end (const cairo_path_fixed_iter_t *iter) if (iter->buf == NULL) return TRUE; - if (iter->n_op == iter->buf->num_ops) - return TRUE; - - if (iter->buf->op[iter->n_op] == CAIRO_PATH_OP_MOVE_TO && - iter->buf->num_ops == iter->n_op + 1) - { - return TRUE; - } - - return FALSE; + return iter->n_op == iter->buf->num_ops; } |