Function NewBitmapFromFileForDPI

bitmap.go:128–148

NewBitmapFromFileForDPI creates new bitmap from a bitmap file at given DPI.

(filePath string, dpi int)

// NewBitmapFromFileForDPI creates new bitmap from a bitmap file at given DPI.
func NewBitmapFromFileForDPI(filePath string, dpi int) (*Bitmap, error) {
	var si win.GdiplusStartupInput
	si.GdiplusVersion = 1
	if status := win.GdiplusStartup(&si, nil); status != win.Ok {
		return nil, newError(fmt.Sprintf("GdiplusStartup failed with status '%s'", status))
	}
	defer win.GdiplusShutdown()

	var gpBmp *win.GpBitmap
	if status := win.GdipCreateBitmapFromFile(syscall.StringToUTF16Ptr(filePath), &gpBmp); status != win.Ok {
		return nil, newError(fmt.Sprintf("GdipCreateBitmapFromFile failed with status '%s' for file '%s'", status, filePath))
	}
	defer win.GdipDisposeImage((*win.GpImage)(gpBmp))

	var hBmp win.HBITMAP
	if status := win.GdipCreateHBITMAPFromBitmap(gpBmp, &hBmp, 0); status != win.Ok {
		return nil, newError(fmt.Sprintf("GdipCreateHBITMAPFromBitmap failed with status '%s' for file '%s'", status, filePath))
	}

	return newBitmapFromHBITMAP(hBmp, dpi)
}

// NewBitmapFromImage creates a Bitmap from image.Image at 96dpi.
//