func NewBitmapFromResource(instance w32.HINSTANCE, resName *uint16, resType *uint16, background Color) (*Bitmap, error) {
var gpBitmap *uintptr
var err error
var hRes w32.HRSRC
hRes, err = w32.FindResource(w32.HMODULE(instance), resName, resType)
if err != nil {
return nil, err
}
resSize := w32.SizeofResource(w32.HMODULE(instance), hRes)
pResData := w32.LockResource(w32.LoadResource(w32.HMODULE(instance), hRes))
resBuffer := w32.GlobalAlloc(w32.GMEM_MOVEABLE, resSize)
pResBuffer := w32.GlobalLock(resBuffer)
w32.MoveMemory(pResBuffer, pResData, resSize)
stream := w32.CreateStreamOnHGlobal(resBuffer, false)
gpBitmap, err = w32.GdipCreateBitmapFromStream(stream)
if err != nil {
return nil, err
}
defer stream.Release()
defer w32.GlobalUnlock(resBuffer)
defer w32.GlobalFree(resBuffer)
defer w32.GdipDisposeImage(gpBitmap)
var hbitmap w32.HBITMAP
// Reverse gform.RGB to BGR to satisfy gdiplus color schema.
hbitmap, err = w32.GdipCreateHBITMAPFromBitmap(gpBitmap, uint32(RGB(background.B(), background.G(), background.R())))
if err != nil {
return nil, err
}
return assembleBitmapFromHBITMAP(hbitmap)
}
func NewBitmapFromFile(filepath string, background Color) (*Bitmap, error) {
var gpBitmap *uintptr
var err error
gpBitmap, err = w32.GdipCreateBitmapFromFile(filepath)
if err != nil {
return nil, err
}
defer w32.GdipDisposeImage(gpBitmap)
var hbitmap w32.HBITMAP
// Reverse gform.RGB to BGR to satisfy gdiplus color schema.
hbitmap, err = w32.GdipCreateHBITMAPFromBitmap(gpBitmap, uint32(RGB(background.B(), background.G(), background.R())))
if err != nil {
return nil, err
}
return assembleBitmapFromHBITMAP(hbitmap)
}