(xbm_load) [WINDOWSNT]: Shuffle the bits of directly specified XBMs.

2 files changed, 20 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 90768f33c4c..002c442b376 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2007-12-02  Jason Rumney  <jasonr@gnu.org>
+
+        * image.c (xbm_load) [WINDOWSNT]: Shuffle the bits of directly
+        specified XBMs.
+
 2007-12-01  Richard Stallman  <rms@gnu.org>
 
         * xdisp.c (syms_of_xdisp) <scroll-conservatively>: Doc fix.
diff --git a/src/image.c b/src/image.c
index 28214642c3a..a92578862f0 100644
--- a/src/image.c
+++ b/src/image.c
@@ -3120,6 +3120,8 @@ convert_mono_to_color_image (f, img, foreground, background)
   release_frame_dc (f, hdc);
   old_prev = SelectObject (old_img_dc, img->pixmap);
   new_prev = SelectObject (new_img_dc, new_pixmap);
+  /* Windows convention for mono bitmaps is black = background,
+     white = foreground.  */
   SetTextColor (new_img_dc, background);
   SetBkColor (new_img_dc, foreground);
 
@@ -3515,6 +3517,19 @@ xbm_load (f, img)
           else
             bits = XBOOL_VECTOR (data)->data;
 
+#ifdef WINDOWSNT
+          {
+            char *invertedBits;
+            int nbytes, i;
+            /* Windows mono bitmaps are reversed compared with X.  */
+            invertedBits = bits;
+            nbytes = (img->width + BITS_PER_CHAR - 1) / BITS_PER_CHAR 
+              * img->height;
+            bits = (char *) alloca(nbytes);
+            for (i = 0; i < nbytes; i++)
+              bits[i] = XBM_BIT_SHUFFLE (invertedBits[i]);
+          }
+#endif
           /* Create the pixmap.  */
 
           Create_Pixmap_From_Bitmap_Data (f, img, bits,