Rework C source files to avoid ^(

[gnu-emacs] / src / nsimage.m

diff --git a/src/nsimage.m b/src/nsimage.m
index e76a7db8ef387eac73d8cd8c40ceb77732ebc4d4..5b2534b900725e19c65c64174a009bbb02c960f0 100644 (file)
--- a/src/nsimage.m
+++ b/src/nsimage.m
@@ -1,13 +1,13 @@
 /* Image support for the NeXT/Open/GNUstep and MacOSX window system.
-   Copyright (C) 1989, 1992-1994, 2005-2006, 2008-2015 Free Software
+   Copyright (C) 1989, 1992-1994, 2005-2006, 2008-2016 Free Software
    Foundation, Inc.
 
 This file is part of GNU Emacs.
 
 GNU Emacs is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
 
 GNU Emacs is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -66,7 +66,7 @@ ns_image_for_XPM (int width, int height, int depth)
 void *
 ns_image_from_file (Lisp_Object file)
 {
-  NSTRACE ("ns_image_from_bitmap_file");
+  NSTRACE ("ns_image_from_file");
   return [EmacsImage allocInitFromFile: file];
 }
 
@@ -202,10 +202,13 @@ ns_set_alpha (void *img, int x, int y, unsigned char a)
 }
 
 
+/* Create image from monochrome bitmap. If both FG and BG are 0
+   (black), set the background to white and make it transparent. */
 - initFromXBM: (unsigned char *)bits width: (int)w height: (int)h
            fg: (unsigned long)fg bg: (unsigned long)bg
 {
   unsigned char *planes[5];
+  unsigned char bg_alpha = 0xff;
 
   [self initWithSize: NSMakeSize (w, h)];
 
@@ -219,7 +222,10 @@ ns_set_alpha (void *img, int x, int y, unsigned char a)
   [bmRep getBitmapDataPlanes: planes];
 
   if (fg == 0 && bg == 0)
-    bg = 0xffffff;
+    {
+      bg = 0xffffff;
+      bg_alpha = 0;
+    }
 
   {
     /* pull bits out to set the (bytewise) alpha mask */
@@ -244,21 +250,22 @@ ns_set_alpha (void *img, int x, int y, unsigned char a)
           c = *s++;
           for (k = 0; i < w && k < 8; ++k, ++i)
             {
-              *alpha++ = 0xff;
-              if (c & 1)
+              if (c & 0x80)
                 {
                   *rr++ = fgr;
                   *gg++ = fgg;
                   *bb++ = fgb;
+                  *alpha++ = 0xff;
                 }
               else
                 {
                   *rr++ = bgr;
                   *gg++ = bgg;
                   *bb++ = bgb;
+                  *alpha++ = bg_alpha;
                 }
               idx++;
-              c >>= 1;
+              c <<= 1;
             }
         }
   }