Reyza

   1: <UserControl x:Class="CropImage.MainPage"

   2:     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

   3:     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

   4:     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

   5:     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

   6:     mc:Ignorable="d"

   7:     d:DesignHeight="650" d:DesignWidth="800" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk">

   8:  

   9:     <Grid x:Name="LayoutRoot" Background="Black">

  10:         <Image Height="400" HorizontalAlignment="Left" Margin="12,12,0,0" Name="Image_Source" MouseLeftButtonDown="Image_Source_MouseLeftButtonDown" Stretch="Fill" VerticalAlignment="Top" Width="550" Source="/CropImage;component/images/Femur-01.png" />

  11:         <Image Height="175" HorizontalAlignment="Left" Margin="600,79,0,0" Name="Image_Destination" Stretch="Fill" VerticalAlignment="Top" Width="175" />

  12:         <Button Content="Crop" Height="23" HorizontalAlignment="Left" Margin="12,497,0,0" Name="Button_Crop" VerticalAlignment="Top" Width="75" Click="Button_Crop_Click" />

  13:         <sdk:Label Height="23" HorizontalAlignment="Left" Margin="12,425,0,0" Name="label1" VerticalAlignment="Top" Width="430" Foreground="White" Content="Klik satu titik pada gambar untuk menentukan titik pusat area cropping" />

  14:         <sdk:Label Height="23" HorizontalAlignment="Left" Margin="12,446,0,0" Name="label3" VerticalAlignment="Top" Width="56" Foreground="White" Content="X Offset :" />

  15:         <sdk:Label Height="23" HorizontalAlignment="Left" Margin="74,446,0,0" Name="Label_MouseX" VerticalAlignment="Top" Width="52" Foreground="White" />

  16:         <sdk:Label Height="23" HorizontalAlignment="Left" Margin="12,468,0,0" Name="label5" VerticalAlignment="Top" Width="52" Foreground="White" Content="Y Offset :" />

  17:         <sdk:Label Height="23" HorizontalAlignment="Left" Margin="74,468,0,0" Name="Label_MouseY" VerticalAlignment="Top" Width="52" Foreground="White" />

  18:         <sdk:Label Height="21" HorizontalAlignment="Left" Margin="646,44,0,0" Name="label6" VerticalAlignment="Top" Width="85" Content="Hasil Cropping" Foreground="White" />

  19:         <Rectangle Height="175" HorizontalAlignment="Left" Margin="600,79,0,0" Name="rectangle1" Stroke="White" StrokeThickness="3" VerticalAlignment="Top" Width="175" />

  20:         <Rectangle Height="400" HorizontalAlignment="Left" Margin="12,12,0,0" Name="rectangle2" Stroke="White" StrokeThickness="3" VerticalAlignment="Top" Width="551" />

  21:     </Grid>

  22: </UserControl>

private void Image_Source_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)

{

    Point mouseXY = e.GetPosition(null);

    mouseX = e.GetPosition(null).X.ToString();

    mouseY = e.GetPosition(null).Y.ToString();

    Label_MouseX.Content = mouseX;

    Label_MouseY.Content = mouseY;

}

   1: private void Button_Crop_Click(object sender, RoutedEventArgs e)

   2: {

   3:     // menangkap data gambar sumber (gambar besar)

   4:     // dan memasukkannya ke dalam objek wb

   5:     WriteableBitmap wb = new WriteableBitmap(Image_Source, null);

   6:  

   7:     // menentukan titik awal cropping

   8:     int xOffset = Convert.ToInt32(mouseX) - 88;

   9:     int yOffset = Convert.ToInt32(mouseY) - 88;

  10:  

  11:     // memeriksa batas cropping

  12:     if (xOffset < 0)

  13:     {

  14:         xOffset = 0;

  15:     }

  16:     else if (xOffset + 175 > Image_Source.Width)

  17:     {

  18:         xOffset = Convert.ToInt32(Image_Source.Width) - 175;

  19:     }

  20:  

  21:  

  22:     if (yOffset < 0)

  23:     {

  24:         yOffset = 0;

  25:     }

  26:     else if (yOffset + 175 > Image_Source.Height)

  27:     {

  28:         yOffset = Convert.ToInt32(Image_Source.Height) - 175;

  29:     }

  30:  

  31:     // cropping dilakukan

  32:     Image_Destination.Source = CropImage(wb, xOffset, yOffset, 175, 175);

  33: }

private WriteableBitmap CropImage(WriteableBitmap source, int xOffset, int yOffset, int w, int h)

{

    int sourceWidth = source.PixelWidth;

    WriteableBitmap result = new WriteableBitmap(w, h);

    for (int y = 0; y <= h - 1; y++)

    {

        int sourceIndex = xOffset + (yOffset + y) * sourceWidth;

        int destinationIndex = y * w;

        Array.Copy(source.Pixels, sourceIndex, result.Pixels, destinationIndex, w);

    }

    return result;

}