[gimp/metadata-browser] fix the rgb565 mode of the raw plugin.

[Roman Joost <romanofski src gnome org>]

commit d946de1b6ed4b09572369e7cccb7fb5e480aebd1
Author: Simon Budig <simon budig de>
Date:   Thu Dec 1 11:05:09 2011 +0100

    fix the rgb565 mode of the raw plugin.
    
    The rgb565 mode of the raw plugin was wrong. Some colors accidentially
    got bits from the adjacent colors. Fixed by properly masking the resp.
    bits and properly extending them to the 8 bit range.

 plug-ins/common/file-raw.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/plug-ins/common/file-raw.c b/plug-ins/common/file-raw.c
index edc1b05..aecb71e 100644
--- a/plug-ins/common/file-raw.c
+++ b/plug-ins/common/file-raw.c
@@ -435,9 +435,9 @@ rgb_565_to_888 (guint16 *in,
 
   for (i = 0, j = 0; i < num_pixels; i++)
     {
-      out[j++] = 0x00FF & ((in[i] >> 8) | ((in[i] >> 13) & 0x0007));
-      out[j++] = 0x00FF & ((in[i] >> 3) | ((in[i] >>  9) & 0x0003));
-      out[j++] = 0x00FF & ((in[i] << 3) | ((in[i] >>  2) & 0x0007));
+      out[j++] = ((((in[i] >> 11) & 0x1f) * 0x21) >> 2);
+      out[j++] = ((((in[i] >>  5) & 0x3f) * 0x41) >> 4);
+      out[j++] = ((((in[i] >>  0) & 0x1f) * 0x21) >> 2);
     }
 }