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# Tile current selection with pattern inside selection.
# Author: Andrew Trevorrow (andrew@trevorrow.com), June 2007.
# Updated to handle multi-state patterns, Aug 2008.
use strict;
my @selrect = g_getselrect();
g_exit("There is no selection.") if @selrect == 0;
my $selpatt = g_getcells(@selrect);
g_exit("No pattern in selection.") if @{$selpatt} == 0;
# determine if selpatt is one-state or multi-state
my $inc = 2;
if (@{$selpatt} & 1 == 1) { $inc = 3 }
# ------------------------------------------------------------------------------
# return a rect which is the minimal bounding box of given pattern
sub getminbox {
my $cells = shift;
my $len = @{$cells};
return () if $len < 2;
my $minx = $cells->[0];
my $miny = $cells->[1];
my $maxx = $minx;
my $maxy = $miny;
# ignore padding int if present
$len -= 1 if ($inc == 3) and ($len % 3 == 1);
for (my $x = 0; $x < $len; $x += $inc) {
if ($cells->[$x] < $minx) { $minx = $cells->[$x] }
if ($cells->[$x] > $maxx) { $maxx = $cells->[$x] }
}
for (my $y = 1; $y < $len; $y += $inc) {
if ($cells->[$y] < $miny) { $miny = $cells->[$y] }
if ($cells->[$y] > $maxy) { $maxy = $cells->[$y] }
}
return ($minx, $miny, $maxx - $minx + 1, $maxy - $miny + 1);
}
# ------------------------------------------------------------------------------
sub clip_left {
my ($cells, $left) = @_;
my $len = @{$cells};
my $x = 0;
if ($inc == 3) {
# ignore padding int if present
$len -= 1 if $len % 3 == 1;
while ($x < $len) {
if ($cells->[$x] >= $left) {
g_setcell($cells->[$x], $cells->[$x+1], $cells->[$x+2]);
}
$x += 3;
}
} else {
while ($x < $len) {
if ($cells->[$x] >= $left) {
g_setcell($cells->[$x], $cells->[$x+1], 1);
}
$x += 2;
}
}
}
# ------------------------------------------------------------------------------
sub clip_right {
my ($cells, $right) = @_;
my $len = @{$cells};
my $x = 0;
if ($inc == 3) {
# ignore padding int if present
$len -= 1 if $len % 3 == 1;
while ($x < $len) {
if ($cells->[$x] <= $right) {
g_setcell($cells->[$x], $cells->[$x+1], $cells->[$x+2]);
}
$x += 3;
}
} else {
while ($x < $len) {
if ($cells->[$x] <= $right) {
g_setcell($cells->[$x], $cells->[$x+1], 1);
}
$x += 2;
}
}
}
# ------------------------------------------------------------------------------
sub clip_top {
my ($cells, $top) = @_;
my $len = @{$cells};
my $y = 1;
if ($inc == 3) {
# ignore padding int if present
$len -= 1 if $len % 3 == 1;
while ($y < $len) {
if ($cells->[$y] >= $top) {
g_setcell($cells->[$y-1], $cells->[$y], $cells->[$y+1]);
}
$y += 3;
}
} else {
while ($y < $len) {
if ($cells->[$y] >= $top) {
g_setcell($cells->[$y-1], $cells->[$y], 1);
}
$y += 2;
}
}
}
# ------------------------------------------------------------------------------
sub clip_bottom {
my ($cells, $bottom) = @_;
my $len = @{$cells};
my $y = 1;
if ($inc == 3) {
# ignore padding int if present
$len -= 1 if $len % 3 == 1;
while ($y < $len) {
if ($cells->[$y] <= $bottom) {
g_setcell($cells->[$y-1], $cells->[$y], $cells->[$y+1]);
}
$y += 3;
}
} else {
while ($y < $len) {
if ($cells->[$y] <= $bottom) {
g_setcell($cells->[$y-1], $cells->[$y], 1);
}
$y += 2;
}
}
}
# ------------------------------------------------------------------------------
# set selection edges
my $selleft = $selrect[0];
my $seltop = $selrect[1];
my $selright = $selleft + $selrect[2] - 1;
my $selbottom = $seltop + $selrect[3] - 1;
# find selpatt's minimal bounding box
my @bbox = getminbox($selpatt);
my $i;
# first tile selpatt horizontally, clipping where necessary
my $left = $bbox[0];
my $right = $left + $bbox[2] - 1;
$i = 0;
while ($left > $selleft) {
$left -= $bbox[2];
$i += 1;
if ($left >= $selleft) {
g_putcells($selpatt, -$bbox[2] * $i, 0);
} else {
my $tempcells = g_transform($selpatt, -$bbox[2] * $i, 0);
clip_left($tempcells, $selleft);
}
}
$i = 0;
while ($right < $selright) {
$right += $bbox[2];
$i += 1;
if ($right <= $selright) {
g_putcells($selpatt, $bbox[2] * $i, 0);
} else {
my $tempcells = g_transform($selpatt, $bbox[2] * $i, 0);
clip_right($tempcells, $selright);
}
}
# get new selection pattern and tile vertically, clipping where necessary
$selpatt = g_getcells(@selrect);
@bbox = getminbox($selpatt);
my $top = $bbox[1];
my $bottom = $top + $bbox[3] - 1;
$i = 0;
while ($top > $seltop) {
$top -= $bbox[3];
$i += 1;
if ($top >= $seltop) {
g_putcells($selpatt, 0, -$bbox[3] * $i);
} else {
my $tempcells = g_transform($selpatt, 0, -$bbox[3] * $i);
clip_top($tempcells, $seltop);
}
}
$i = 0;
while ($bottom < $selbottom) {
$bottom += $bbox[3];
$i += 1;
if ($bottom <= $selbottom) {
g_putcells($selpatt, 0, $bbox[3] * $i);
} else {
my $tempcells = g_transform($selpatt, 0, $bbox[3] * $i);
clip_bottom($tempcells, $selbottom);
}
}
g_fitsel() if !g_visrect(@selrect);
|
