Applied patch [ 605188 ] Fix to draw 24 bit bitmaps

Derry Bryson

Fix to wxPrinterDC::DrawBitmap() to print 24 bit bitmaps
at 24 bits rather than 8 bits.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16996 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -285,6 +285,7 @@ wxMSW:
   provided in wxFontData
 - Added wxTE_LEFT, wxTE_CENTRE and wxTE_RIGHT flags for text
   control alignment.
+- Bitmap printing uses 24 bits now, not 8.
 
 wxGTK:
 

src/msw/dcprint.cpp

@@ -416,6 +416,10 @@ WXHDC WXDLLEXPORT wxGetPrinterDC(const wxPrintData& printDataConst)
 #define GDI_ERROR -1
 #endif
 
+// Just in case we want to go back to using 8 bits for
+// any reason: set this to 0 for 8 bits.
+#define wxUSE_DRAWBITMAP_24BITS 1
+
 void wxPrinterDC::DoDrawBitmap(const wxBitmap &bmp,
                                wxCoord x, wxCoord y,
                                bool useMask)
@@ -430,7 +434,11 @@ void wxPrinterDC::DoDrawBitmap(const wxBitmap &bmp,
         BITMAPINFO *info = (BITMAPINFO *) malloc( sizeof( BITMAPINFOHEADER ) + 256 * sizeof(RGBQUAD ) );
         memset( info, 0, sizeof( BITMAPINFOHEADER ) );
 
-        int iBitsSize = ((width + 3 ) & ~3 ) * height;
+#if wxUSE_DRAWBITMAP_24BITS
+        int iBitsSize = ((width + 3 ) & ~3 ) * height * 3;
+#else
+        int iBitsSize = ((width + 3 ) & ~3 ) * height ;
+#endif
 
         void* bits = malloc( iBitsSize );
 
@@ -438,7 +446,11 @@ void wxPrinterDC::DoDrawBitmap(const wxBitmap &bmp,
         info->bmiHeader.biWidth = width;
         info->bmiHeader.biHeight = height;
         info->bmiHeader.biPlanes = 1;
+#if wxUSE_DRAWBITMAP_24BITS
+        info->bmiHeader.biBitCount = 24;
+#else
         info->bmiHeader.biBitCount = 8;
+#endif        
         info->bmiHeader.biCompression = BI_RGB;
 
         ScreenHDC display;