B_COLOR_8_BIT
fSmallIcon = new BBitmap(rect, B_COLOR_8_BIT);
fBigIcon = new BBitmap(rect, B_COLOR_8_BIT);
fSmallIcon = new BBitmap(BRect(0, 0, 15, 15), B_COLOR_8_BIT);
fBigIcon = new BBitmap(BRect(0, 0, 31, 31), B_COLOR_8_BIT);
const color_space kLargeIconColorSpace = B_COLOR_8_BIT;
const color_space kMiniIconColorSpace = B_COLOR_8_BIT;