func newNullBrush() *nullBrush {
lb := &win.LOGBRUSH{LbStyle: win.BS_NULL}
hBrush := win.CreateBrushIndirect(lb)
if hBrush == 0 {
panic("failed to create null brush")
}
return &nullBrush{hBrush: hBrush}
}
func NewHatchBrush(color Color, style HatchStyle) (*HatchBrush, error) {
lb := &win.LOGBRUSH{LbStyle: win.BS_HATCHED, LbColor: win.COLORREF(color), LbHatch: uintptr(style)}
hBrush := win.CreateBrushIndirect(lb)
if hBrush == 0 {
return nil, newError("CreateBrushIndirect failed")
}
return &HatchBrush{hBrush: hBrush, color: color, style: style}, nil
}
func NewSolidColorBrush(color Color) (*SolidColorBrush, error) {
lb := &win.LOGBRUSH{LbStyle: win.BS_SOLID, LbColor: win.COLORREF(color)}
hBrush := win.CreateBrushIndirect(lb)
if hBrush == 0 {
return nil, newError("CreateBrushIndirect failed")
}
return &SolidColorBrush{hBrush: hBrush, color: color}, nil
}
func NewBitmapBrush(bitmap *Bitmap) (*BitmapBrush, error) {
if bitmap == nil {
return nil, newError("bitmap cannot be nil")
}
lb := &win.LOGBRUSH{LbStyle: win.BS_DIBPATTERN, LbColor: win.DIB_RGB_COLORS, LbHatch: uintptr(bitmap.hPackedDIB)}
hBrush := win.CreateBrushIndirect(lb)
if hBrush == 0 {
return nil, newError("CreateBrushIndirect failed")
}
return &BitmapBrush{hBrush: hBrush, bitmap: bitmap}, nil
}