Changeset 7736 for trunk/psLib/src/jpeg/psImageJpeg.c

Timestamp:

Jun 28, 2006, 10:50:51 AM (20 years ago)

Author:

magnier

Message:

fixed overflow bug in psImageJpeg

File:

• trunk/psLib/src/jpeg/psImageJpeg.c (modified) (2 diffs)

trunk/psLib/src/jpeg/psImageJpeg.c

@@ -140 +140 @@
     PS_ASSERT_INT_POSITIVE(strlen(filename), false);
 
+    float zero, scale;
     struct jpeg_compress_struct cinfo;
     struct jpeg_error_mgr jerr;
@@ -177 +178 @@
     psU8 *Bpix = map->blue->data.U8;
 
-    float zero = min;
-    float scale = 256.0/(max - min);
+    if (max == min) {
+        zero = min - 0.1;
+        scale = 256.0/0.2;
+    } else {
+        zero = min;
+        scale = 256.0/(max - min);
+    }
 
     for (int j = 0; j < image->numRows; j++) {