Make bitmaps work when compiling on Tiger and add some comments about this.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34278 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/cocoa/bitmap.mm b/src/cocoa/bitmap.mm
index 97d7712b1e484b2bbe8bbf99d04087552fd5f562..2e18c0ae2bc837db4584930f152ff530a78be383 100644 (file)
--- a/src/cocoa/bitmap.mm
+++ b/src/cocoa/bitmap.mm
@@ -299,7 +299,8 @@ bool wxBitmap::Create(int w, int h, int d)
             hasAlpha: NO
             isPlanar: NO
             colorSpaceName: NSCalibratedRGBColorSpace
-            bytesPerRow: 0
+            bytesPerRow: 0  // NOTE: Contrary to Apple documentation Mac OS
+                            // 10.4 will add padding bytes when 0 is used here
             bitsPerPixel: 0];
 
     wxLogTrace(wxTRACE_COCOA,wxT("M_BITMAPDATA=%p NSBitmapImageRep bitmapData=%p"), M_BITMAPDATA, [M_BITMAPDATA->m_cocoaNSBitmapImageRep bitmapData]);
@@ -447,9 +448,11 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
             hasAlpha: NO
             isPlanar: NO
             colorSpaceName: NSCalibratedRGBColorSpace
-            bytesPerRow: 0
+            bytesPerRow: image.GetWidth()*3
             bitsPerPixel: 0];
 
+    // TODO: Specify bytesPerRow:0 and then use [bitmapImage bytesPerRow]
+    // so that the rows are aligned suitably for altivec by the OS (Tiger)
     const int numBytes = image.GetWidth()*image.GetHeight()*3;
     memcpy([bitmapImage bitmapData], image.GetData(), numBytes);
     // TODO: Alpha and convert to desired depth