From: Jakob Haufe <sur5r@sur5r.net>
Date: Sun, 16 Jul 2017 11:29:05 +0000 (+0000)
Subject: Correctly implement placement of pages with offsets
X-Git-Tag: v0.4^0
X-Git-Url: https://git.sur5r.net/?p=pdfstitch;a=commitdiff_plain;h=3adb6b5996b5e14bbaa9261ab0f030f91b89429a

Correctly implement placement of pages with offsets

The coordinate origin of the imported page does not change when applying
a bounding box. Formula adjusted accordingly. Also include previously
forgotten per-page offset in this calculation.

Also change internal row/column counter to zero-based.
---

diff --git a/pdfstitch b/pdfstitch
index e1c60dc..4c151e1 100755
--- a/pdfstitch
+++ b/pdfstitch
@@ -175,11 +175,11 @@ else
         my $stitchedpdf = PDF::API2->new();
 
         my $page = $stitchedpdf->page();
-        $page->mediabox($width + 100, $height + 100);
+        $page->mediabox($width, $height);
 
         my $content = $page->gfx();
-        my $column = 1;
-        my $row = 1;
+        my $column = 0;
+        my $row = 0;
 
         foreach my $pagenr (@{$meta->{pageorder}})
         {
@@ -194,15 +194,15 @@ else
 
                 $xo->bbox($llx, $lly, $urx, $ury);
 
-                my $xpos = ($column - 1) * $meta->{width};
-                my $ypos = $height - ($row * $meta->{height});
+                my $xpos = ($column) * $meta->{width} - ($meta->{x} + $meta->{pageoffsets}->{$pagenr}->{x});
+                my $ypos = $height - (($row+1) * $meta->{height}) - ($meta->{y} + $meta->{pageoffsets}->{$pagenr}->{y});
                 $content->formimage($xo, $xpos, $ypos);
             }
             $column++;
-            if($column > $meta->{columns})
+            if($column == $meta->{columns})
             {
                 $row++;
-                $column=1;
+                $column=0;
             }
         }