From e9d8a67bc15f8d973c67a5add0543be90f3a797a Mon Sep 17 00:00:00 2001
From: "dgp@users.sourceforge.net" <dgp>
Date: Tue, 5 May 2015 19:30:16 +0000
Subject: [3603436][06c3fcb136] Correction to earlier bugfix.  When alpha
 values are all opaque, so that image format writers may use non-alpha
 supporting formats losslessly, make sure that message always gets back to the
 caller.

---
 generic/tkImgPhoto.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/generic/tkImgPhoto.c b/generic/tkImgPhoto.c
index 58c4484..780b0c2 100644
--- a/generic/tkImgPhoto.c
+++ b/generic/tkImgPhoto.c
@@ -5648,6 +5648,9 @@ ImgGetPhoto(
 	    break;
 	}
     }
+    if (!alphaOffset) {
+	blockPtr->offset[3]= -1; /* Tell caller alpha need not be read */
+    }
     greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
     blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
     if (((optPtr->options & OPT_BACKGROUND) && alphaOffset) ||
@@ -5766,9 +5769,6 @@ ImgGetPhoto(
 	    blockPtr->offset[2]= 0;
 	    blockPtr->offset[3]= 1;
 	}
-	if (!alphaOffset) {
-	  blockPtr->offset[3]= -1;
-	}
 	return data;
     }
     return NULL;
-- 
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