16 bpc PNG images were not being written properly when strips were being used. while png_set_swap() is supposed to tell the system to reverse the order of the bits when writing the file, I was unable to get this to work, so I resorted to a brute-force reversal of the bits - but then forgot to put the bits BACK. This is not a problem for single strips, but with multiple strips things get very confused. png_set_swap would make this a non-issue.

git-svn-id: https://flam3.googlecode.com/svn/trunk@88 77852712-ef1d-11de-8684-7d64432d61a3

1 files changed, 9 insertions, 2 deletions

diff --git a/src/png.c b/src/png.c
index 1bdba5f..8eee7c7 100755
--- a/src/png.c
+++ b/src/png.c
@@ -106,8 +106,6 @@ void write_png(FILE *file, void *image, int width, int height, flam3_img_comment
        im[i] = htons(im[i]);
     }
   }
-      
-  
 
   if (pngcom_enable==1)
 	  png_set_text(png_ptr, info_ptr, text, FLAM3_PNG_COM);
@@ -117,6 +115,15 @@ void write_png(FILE *file, void *image, int width, int height, flam3_img_comment
   png_write_end(png_ptr, info_ptr);
   png_destroy_write_struct(&png_ptr, &info_ptr);
   free(rows);
+
+  /* Swap back the bytes in case we're doing strips */       
+  if (2==bpc && testbe != htons(testbe)) {
+    unsigned short *im = (unsigned short *)image;
+    for (i=0; i<height*width*4; i++) {
+       im[i] = htons(im[i]);
+    }
+  }
+
 }
 
 #define SIG_CHECK_SIZE 8