Save the alpha values if the image has an alpha channel

[wxWidgets.git] / src / common / imagbmp.cpp

diff --git a/src/common/imagbmp.cpp b/src/common/imagbmp.cpp
index 1ba36f910c643e169b8a71280eae52f995889100..247a300e6deb91e9aa31add878811fde09f61aaa 100644 (file)
--- a/src/common/imagbmp.cpp
+++ b/src/common/imagbmp.cpp
@@ -7,7 +7,7 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
 #pragma implementation "imagbmp.h"
 #endif
 
@@ -43,7 +43,7 @@
 #endif
 
 #ifdef __WXMSW__
-#include <windows.h>
+#include "wx/msw/wrapwin.h"
 #endif
 
 //-----------------------------------------------------------------------------
@@ -55,8 +55,14 @@ IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler)
 #if wxUSE_STREAMS
 
 #ifndef BI_RGB
-#define BI_RGB       0
+    #define BI_RGB       0
+#endif
+
+#ifndef BI_RLE8
 #define BI_RLE8      1
+#endif
+
+#ifndef BI_RLE4
 #define BI_RLE4      2
 #endif
 
@@ -459,7 +465,7 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height,
     wxUint16        aWord;
 
     // allocate space for palette if needed:
-    _cmap *cmap = NULL;
+    _cmap *cmap;
 
     if ( bpp < 16 )
     {
@@ -602,27 +608,23 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height,
         ptr = data;
     }
 
-    int line = 0;
-    int column = 0;
     int linesize = ((width * bpp + 31) / 32) * 4;
 
     /* BMPs are stored upside down */
-    for ( line = (height - 1); line >= 0; line-- )
+    for ( int line = (height - 1); line >= 0; line-- )
     {
         int linepos = 0;
-        for ( column = 0; column < width ; )
+        for ( int column = 0; column < width ; )
         {
             if ( bpp < 16 )
             {
-                int index = 0;
                 linepos++;
                 aByte = stream.GetC();
                 if ( bpp == 1 )
                 {
-                    int bit = 0;
-                    for (bit = 0; bit < 8 && column < width; bit++)
+                    for (int bit = 0; bit < 8 && column < width; bit++)
                     {
-                        index = ((aByte & (0x80 >> bit)) ? 1 : 0);
+                        int index = ((aByte & (0x80 >> bit)) ? 1 : 0);
                         ptr[poffset] = cmap[index].r;
                         ptr[poffset + 1] = cmap[index].g;
                         ptr[poffset + 2] = cmap[index].b;
@@ -700,10 +702,9 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height,
                     }
                     else
                     {
-                        int nibble = 0;
-                        for (nibble = 0; nibble < 2 && column < width; nibble++)
+                        for (int nibble = 0; nibble < 2 && column < width; nibble++)
                         {
-                            index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4));
+                            int index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4));
                             if ( index >= 16 )
                                 index = 15;
                             ptr[poffset] = cmap[index].r;