+ {
+ keyMaskColor = wxImageHistogram::MakeKey(
+ image.GetMaskRed(), image.GetMaskGreen(), image.GetMaskBlue());
+ // get mask before image is modified
+ wxBitmap bitmap(image, 1);
+ mask = bitmap.GetMask()->GetBitmap();
+ g_object_ref(mask);
+ }
+ else
+ {
+ const int size = ((w + 7) / 8) * h;
+ char* bits = new char[size];
+ memset(bits, 0xff, size);
+ mask = gdk_bitmap_create_from_data(
+ wxGetRootWindow()->window, bits, w, h);
+ delete[] bits;
+ }
+
+ // modify image so wxBitmap can be used to convert to pixmap
+ image_copy.SetMask(false);
+ int i, j;
+ wxByte* data = image_copy.GetData();
+ for (j = 0; j < h; j++)
+ {
+ for (i = 0; i < w; i++, data += 3)
+ {
+ //if average value is > mid grey
+ if (int(data[0]) + data[1] + data[2] >= 3 * 128)
+ {
+ // wxBitmap only converts (255,255,255) to white
+ data[0] = 255;
+ data[1] = 255;
+ data[2] = 255;
+ }
+ }
+ }
+ wxBitmap bitmap(image_copy, 1);