X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e5d4ef7410d597bdf6d426ceedc656dbefd69e90..6f94aa869d07fd18ed16f8bb237f13fed2da6185:/src/msw/bitmap.cpp

diff --git a/src/msw/bitmap.cpp b/src/msw/bitmap.cpp
index b80b7989d9..f4681af5ea 100644
--- a/src/msw/bitmap.cpp
+++ b/src/msw/bitmap.cpp
@@ -310,11 +310,38 @@ bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
 
     refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
 
-    // the mask returned by GetIconInfo() is inversed compared to the usual
-    // wxWin convention
-    refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h));
-
-
+#if wxUSE_WXDIB
+    // If the icon is 32 bits per pixel then it may have alpha channel data,
+    // although there are some icons that are 32 bpp but have no alpha... So
+    // convert to a DIB and manually check the 4th byte for each pixel.
+    BITMAP bm;
+    if ( ::GetObject(iconInfo.hbmColor, sizeof(BITMAP), (LPVOID)&bm)
+         && bm.bmBitsPixel == 32)
+    {
+        wxDIB dib(iconInfo.hbmColor);
+        if (dib.IsOk())
+        {
+            unsigned char* pixels = dib.GetData();
+            for (int idx=0; idx<w*h*4; idx+=4)
+            {
+                if (pixels[idx+3] != 0) 
+                {
+                    // If there is an alpha byte that is non-zero then set the
+                    // alpha flag and bail out of the loop.
+                    refData->m_hasAlpha = true;
+                    break;
+                }
+            }
+        }
+    }
+#endif
+    if ( !refData->m_hasAlpha )
+    {
+        // the mask returned by GetIconInfo() is inverted compared to the usual
+        // wxWin convention
+        refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h));
+    }
+    
     // delete the old one now as we don't need it any more
     ::DeleteObject(iconInfo.hbmMask);
 
@@ -408,7 +435,7 @@ wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
     {
         // we assume that it is in XBM format which is not quite the same as
         // the format CreateBitmap() wants because the order of bytes in the
-        // line is inversed!
+        // line is reversed!
         const size_t bytesPerLine = (width + 7) / 8;
         const size_t padding = bytesPerLine % 2;
         const size_t len = height * ( padding + bytesPerLine );
@@ -426,7 +453,7 @@ wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
                 for ( int bits = 0; bits < 8; bits++)
                 {
                     reversed <<= 1;
-                    reversed |= (val & 0x01);
+                    reversed |= (unsigned char)(val & 0x01);
                     val >>= 1;
                 }
                 *dst++ = reversed;
@@ -843,9 +870,42 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc)
     // finally also set the mask if we have one
     if ( image.HasMask() )
     {
-        SetMask(new wxMask(*this, wxColour(image.GetMaskRed(),
-                                           image.GetMaskGreen(),
-                                           image.GetMaskBlue())));
+        const size_t len  = 2*((w+15)/16);
+        BYTE *src  = image.GetData();
+        BYTE *data = new BYTE[h*len];
+        memset(data, 0, h*len);
+        BYTE r = image.GetMaskRed(),
+             g = image.GetMaskGreen(),
+             b = image.GetMaskBlue();
+        BYTE *dst = data;
+        for ( int y = 0; y < h; y++, dst += len )
+        {
+            BYTE *dstLine = dst;
+            BYTE mask = 0x80;
+            for ( int x = 0; x < w; x++, src += 3 )
+            {
+                if (src[0] != r || src[1] != g || src[2] != b)
+                    *dstLine |= mask;
+
+                if ( (mask >>= 1) == 0 )
+                {
+                    dstLine++;
+                    mask = 0x80;
+                }
+            }
+        }
+
+        hbitmap = ::CreateBitmap(w, h, 1, 1, data);
+        if ( !hbitmap )
+        {
+            wxLogLastError(_T("CreateBitmap(mask)"));
+        }
+        else
+        {
+            SetMask(new wxMask((WXHBITMAP)hbitmap));
+        }
+
+        delete data;
     }
 
     return true;
@@ -1031,7 +1091,7 @@ wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 #ifndef __WXMICROWIN__
     // handle alpha channel, if any
     if (HasAlpha())
-	ret.UseAlpha();
+    ret.UseAlpha();
 
     // copy bitmap data
     MemoryHDC dcSrc,
@@ -1092,6 +1152,15 @@ wxMask *wxBitmap::GetMask() const
     return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL;
 }
 
+wxBitmap wxBitmap::GetMaskBitmap() const
+{
+    wxBitmap bmp;
+    wxMask *mask = GetMask();
+    if ( mask )
+        bmp.SetHBITMAP(mask->GetMaskBitmap());
+    return bmp;
+}
+
 #ifdef __WXDEBUG__
 
 wxDC *wxBitmap::GetSelectedInto() const
@@ -1570,7 +1639,23 @@ HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
         return 0;
     }
 
-    wxMask *mask = bmp.GetMask();
+    wxMask* mask;
+    wxBitmap newbmp;
+    if ( bmp.HasAlpha() )
+    {
+        // Convert alpha to a mask.  NOTE: It would be better to actually put
+        // the alpha into the icon instead of making a mask, but I don't have
+        // time to figure that out today.
+        wxImage img = bmp.ConvertToImage();
+        img.ConvertAlphaToMask();
+        newbmp = wxBitmap(img);
+        mask = newbmp.GetMask();
+    }
+    else
+    {
+        mask = bmp.GetMask();
+    }
+    
     if ( !mask )
     {
         // we must have a mask for an icon, so even if it's probably incorrect,
@@ -1607,7 +1692,7 @@ HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
 
     HICON hicon = ::CreateIconIndirect(&iconInfo);
 
-    if ( !bmp.GetMask() )
+    if ( !bmp.GetMask() && !bmp.HasAlpha() )
     {
         // we created the mask, now delete it
         delete mask;