cardbuilder_screenshot.go

// Take a full screenshot of the page and override the viewport to match the required card dimensions
func fullScreenshot(urlstr string, quality int64, res *[]byte) chromedp.Tasks {
	return chromedp.Tasks{
		chromedp.Navigate(urlstr),
		chromedp.ActionFunc(func(ctx context.Context) error {
			err := emulation.SetDeviceMetricsOverride(597, 1122, 0, false).
				WithScreenOrientation(&emulation.ScreenOrientation{
					Type:  emulation.OrientationTypePortraitPrimary,
					Angle: 0,
				}).
				Do(ctx)
			if err != nil {
				return err
			}

			// capture screenshot
			*res, err = page.CaptureScreenshot().
				WithQuality(quality).
				WithClip(&page.Viewport{
					X:      0,
					Y:      0,
					Width:  597,
					Height: 1122,
					Scale:  1,
				}).Do(ctx)
			if err != nil {
				return err
			}
			return nil
		}),
	}
}