1 files changed, 49 insertions, 45 deletions

diff --git a/tools/roi-visualize.php b/tools/roi-visualize.php
index 9677303..6506730 100755
--- a/tools/roi-visualize.php
+++ b/tools/roi-visualize.php
@@ -16,7 +16,7 @@ function parse_roi_input(string $file): array {
     $lines = array_map(fn($line) => array_map('intval', explode(' ', $line)), $lines);
     foreach ($lines as $points) {
         if (count($points) != 4)
-            throw new Exception("invalid line: ".implode(' ', $points));
+            throw new Exception(__METHOD__.": invalid line: ".implode(' ', $points));
     }
 
     return $lines;
@@ -57,58 +57,62 @@ $colors = [
 if ($argc < 2)
     fatal("usage: {$argv[0]} --roi FILE --input PATH --output PATH\n");
 
-array_shift($argv);
-while (count($argv) > 0) {
-    switch ($argv[0]) {
-        case '--roi':
-            array_shift($argv);
-            $roi_file = array_shift($argv);
-            break;
-
-        case '--input':
-            array_shift($argv);
-            $input = array_shift($argv);
-            break;
-
-        case '--output':
-            array_shift($argv);
-            $output = array_shift($argv);
-            break;
-
-        default:
-            fatal('unsupported argument: '.$argv[0]);
+try {
+    array_shift($argv);
+    while (count($argv) > 0) {
+        switch ($argv[0]) {
+            case '--roi':
+                array_shift($argv);
+                $roi_file = array_shift($argv);
+                break;
+
+            case '--input':
+                array_shift($argv);
+                $input = array_shift($argv);
+                break;
+
+            case '--output':
+                array_shift($argv);
+                $output = array_shift($argv);
+                break;
+
+            default:
+                throw new Exception("unsupported argument: {$argv[0]}");
+        }
     }
-}
 
-if (!$roi_file)
-    throw new Exception("--roi is not specified");
+    if (!$roi_file)
+        throw new Exception("--roi is not specified");
 
-if (!$input)
-    throw new Exception('--input is not specified');
+    if (!$input)
+        throw new Exception('--input is not specified');
 
-if (!$output)
-    throw new Exception('--output is not specified');
+    if (!$output)
+        throw new Exception('--output is not specified');
 
-$regions = parse_roi_input($roi_file);
-$img = imageopen($input);
-if (!$img)
-    throw new Exception("failed to open image");
+    $regions = parse_roi_input($roi_file);
+    $img = imageopen($input);
+    if (!$img)
+        throw new Exception("failed to open image");
 
-$imgw = imagesx($img);
-$imgh = imagesy($img);
+    $imgw = imagesx($img);
+    $imgh = imagesy($img);
 
-foreach ($regions as $i => $region) {
-    list($r, $g, $b) = hex2rgb($colors[$i]);
+    foreach ($regions as $i => $region) {
+        list($r, $g, $b) = hex2rgb($colors[$i]);
 
-    if ($region[0]+$region[2] > $imgw || $region[1]+$region[3] > $imgh)
-        throw new Exception('error: invalid region (line '.($i+1).')');
+        if ($region[0]+$region[2] > $imgw || $region[1]+$region[3] > $imgh)
+            throw new Exception('error: invalid region (line '.($i+1).')');
 
-    $col = imagecolorallocatealpha($img, $r, $g, $b, 50);
-    imagerectangle($img, $region[0], $region[1], $region[0]+$region[2], $region[1]+$region[3], $col);
+        $col = imagecolorallocatealpha($img, $r, $g, $b, 50);
+        imagerectangle($img, $region[0], $region[1], $region[0]+$region[2], $region[1]+$region[3], $col);
 
-    $col = imagecolorallocatealpha($img, $r, $g, $b, 90);
-    imagefilledrectangle($img, $region[0]+1, $region[1]+1, $region[0]+$region[2]-2, $region[1]+$region[3]-2, $col);
-}
+        $col = imagecolorallocatealpha($img, $r, $g, $b, 90);
+        imagefilledrectangle($img, $region[0]+1, $region[1]+1, $region[0]+$region[2]-2, $region[1]+$region[3]-2, $col);
+    }
 
-imagejpeg($img, $output, 97);
-echo "saved to $output\n";
+    imagejpeg($img, $output, 97);
+    echo "saved to $output\n";
+} catch (Exception $e) {
+    fatal($e->getMessage()."\n");
+}
\ No newline at end of file