OMGM Code

--- a
+++ b/omgm/recreate.php
@@ -0,0 +1,95 @@
+<?php
+
+$tiles = array();
+$tiles[] = array("mapId"=>1 );
+$tiles[] = array("mapId"=>2 );
+//$tiles[] = array("mapId"=>3 );
+
+recreateTileFile(1, $tiles);
+
+function recreateTileFile($excludeMapId, $mergedTiles){
+  $destIm = false;
+  $im = false;
+$count = 1;
+  foreach($mergedTiles as $tile){
+    if( $tile["mapId"] != $excludeMapId){
+      echo "Handle ".$tile["mapId"]."\n";
+
+      if( $destIm ){
+        echo "Merge\n";
+        $n = $tile["mapId"]."_img.png";
+        echo "Create img from $n, save debug $count\n";
+        $im = imagecreatefrompng($n);
+        imagepng($im, $count."_debug.png");
+        
+        imagecopymerge_alpha($destIm, $im, 0,0, 0,0, 266,266,100);
+        imagepng($im, (++$count)."_debug.png");
+        echo "After merge, save im to debug $count\n";
+
+        imagepng($destIm, (++$count)."_debug.png"); 
+        echo "After merge, save destIm to debug $count\n";
+
+        echo "Done merge\n";
+      }
+      else{
+        echo "No dest, create first from ".$tile["mapId"]."\n";
+        $destIm = imagecreatefrompng($tile["mapId"]."_img.png");
+        echo "Save debug $count\n";
+        imagepng($destIm, $count."_debug.png");
+      }
+    }
+    $count++;
+    if($im){
+      imagedestroy($im);
+    }
+
+  }
+
+  echo "Destroy and save recreated\n";
+  imagepng($destIm, "recreated_img.png");
+  imagedestroy($destIm);
+}
+
+function imagecopymerge_alpha($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct){
+    if(!isset($pct)){
+        return false;
+    }
+    $pct /= 100;
+    // Get image width and height
+    $w = imagesx( $src_im );
+    $h = imagesy( $src_im );
+    // Turn alpha blending off
+    imagealphablending( $src_im, false );
+    // Find the most opaque pixel in the image (the one with the smallest alpha value)
+    $minalpha = 127;
+    for( $x = 0; $x < $w; $x++ )
+    for( $y = 0; $y < $h; $y++ ){
+        $alpha = ( imagecolorat( $src_im, $x, $y ) >> 24 ) & 0xFF;
+        if( $alpha < $minalpha ){
+            $minalpha = $alpha;
+        }
+    }
+    //loop through image pixels and modify alpha for each
+    for( $x = 0; $x < $w; $x++ ){
+        for( $y = 0; $y < $h; $y++ ){
+            //get current alpha value (represents the TANSPARENCY!)
+            $colorxy = imagecolorat( $src_im, $x, $y );
+            $alpha = ( $colorxy >> 24 ) & 0xFF;
+            //calculate new alpha
+            if( $minalpha !== 127 ){
+                $alpha = 127 + 127 * $pct * ( $alpha - 127 ) / ( 127 - $minalpha );
+            } else {
+                $alpha += 127 * $pct;
+            }
+            //get the color index with new alpha
+            $alphacolorxy = imagecolorallocatealpha( $src_im, ( $colorxy >> 16 ) & 0xFF, ( $colorxy >> 8 ) & 0xFF, $colorxy & 0xFF, $alpha );
+            //set pixel with the new color + opacity
+            if( !imagesetpixel( $src_im, $x, $y, $alphacolorxy ) ){
+                return false;
+            }
+        }
+    }
+    // The image copy
+    imagecopy($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h);
+} 
+?>