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-rw-r--r--src/Fl_cocoa.mm2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index dfdbff8e1..b589c854d 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -4335,7 +4335,7 @@ void Fl_Cocoa_Window_Driver::capture_titlebar_and_borders(Fl_Shared_Image*& top,
uchar *rgba = new uchar[4 * w() * htop * 4];
CGContextRef auxgc = CGBitmapContextCreate(rgba, 2 * w(), 2 * htop, 8, 8 * w(), cspace, kCGImageAlphaPremultipliedLast);
CGColorSpaceRelease(cspace);
- memset(rgba, 0xff, 4 * w() * htop * 4); // initialize to opaque white
+ CGContextClearRect(auxgc, CGRectMake(0,0,2*w(),2*htop));
CGContextScaleCTM(auxgc, 2, 2);
if (layer) {
Fl_Cocoa_Window_Driver::draw_layer_to_context(layer, auxgc, w(), htop);