From 6878eb689955f7b82a1e38c75bc7b02debbd6b8f Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Mon, 29 Jun 2009 16:45:53 -0500
Subject: [devel] Relocate the INVERT_ALPHA function within png_read_png()

and png_write_png().
---
 pngwrite.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

(limited to 'pngwrite.c')

diff --git a/pngwrite.c b/pngwrite.c
index cc60d769b..27744a7b5 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1347,11 +1347,6 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
 {
    if (png_ptr == NULL || info_ptr == NULL)
       return;
-#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
-   /* Invert the alpha channel from opacity to transparency */
-   if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
-      png_set_invert_alpha(png_ptr);
-#endif
 
    /* Write the file header information. */
    png_write_info(png_ptr, info_ptr);
@@ -1411,6 +1406,12 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
       png_set_packswap(png_ptr);
 #endif
 
+#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
+   /* Invert the alpha channel from opacity to transparency */
+   if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
+      png_set_invert_alpha(png_ptr);
+#endif
+
    /* ----------------------- end of transformations ------------------- */
 
    /* Write the bits */
-- 
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