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using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using ScreenGrab.Utilities;
using PixelFormat = System.Drawing.Imaging.PixelFormat;
namespace ScreenGrab.Extensions;
public static class ImageExtensions
{
public static ImageSource? GetWindowBoundsImage(this Window passedWindow)
{
var bmp = passedWindow.GetWindowsBoundsBitmap();
return bmp.ToImageSource();
}
public static Tuple<double, double> GetWidthHeight(this Window window)
{
var dpi = VisualTreeHelper.GetDpi(window);
return new Tuple<double, double>(window.ActualWidth * dpi.DpiScaleX, window.ActualHeight * dpi.DpiScaleY);
}
public static Bitmap GetWindowsBoundsBitmap(this Window passedWindow)
{
var (windowWidth, windowHeight) = passedWindow.GetWidthHeight();
var absPosPoint = passedWindow.GetAbsolutePosition();
var thisCorrectedLeft = (int)absPosPoint.X;
var thisCorrectedTop = (int)absPosPoint.Y;
Bitmap bmp = new((int)windowWidth, (int)windowHeight, PixelFormat.Format32bppArgb);
using var g = Graphics.FromImage(bmp);
g.CopyFromScreen(thisCorrectedLeft, thisCorrectedTop, 0, 0, bmp.Size, CopyPixelOperation.SourceCopy);
return bmp;
}
public static BitmapImage? ToImageSource(this Bitmap? bitmap)
{
if (bitmap == null) return default;
using MemoryStream memory = new();
using WrappingStream wrapper = new(memory);
bitmap.Save(wrapper, ImageFormat.Bmp);
wrapper.Position = 0;
BitmapImage bitmapImage = new();
bitmapImage.BeginInit();
bitmapImage.StreamSource = wrapper;
bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
bitmapImage.EndInit();
bitmapImage.StreamSource = null;
bitmapImage.Freeze();
memory.Flush();
wrapper.Flush();
return bitmapImage;
}
public static Bitmap GetRegionOfScreenAsBitmap(this Rectangle region)
{
if (region.Width <= 1 || region.Height <= 1)
{
return null;
}
Bitmap bmp = new(region.Width, region.Height, PixelFormat.Format32bppArgb);
using var g = Graphics.FromImage(bmp);
g.CopyFromScreen(region.Left, region.Top, 0, 0, bmp.Size, CopyPixelOperation.SourceCopy);
bmp = bmp.PadImage();
return bmp;
}
public static Bitmap PadImage(this Bitmap image, int minW = 64, int minH = 64)
{
if (image.Height >= minH && image.Width >= minW)
return image;
var width = Math.Max(image.Width + 16, minW + 16);
var height = Math.Max(image.Height + 16, minH + 16);
// Create a compatible bitmap
Bitmap destination = new(width, height, image.PixelFormat);
using var gd = Graphics.FromImage(destination);
gd.Clear(image.GetPixel(0, 0));
gd.DrawImageUnscaled(image, 8, 8);
return destination;
}
} |