TechQA.

screen coordinates to sharpdx device context coordinates

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I am new to the sharpdx.

My current work flow is user can capture a pictures using webcam or any cam devices.now i am working to the new feature for users. user able to draw anything at top the image like (mspaint drawing)..

So i desired to take xy points in mouse move event ...and its worked perfectly

This Is My Designer code:-

<Page x:Class="TEST.GraphicsPage"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
      xmlns:enums="clr-namespace:TEST.Model.Enum;assembly=TEST.Core"
      xmlns:common="clr-namespace:TEST.Core.Common;assembly=TEST.Core"
      xmlns:controls="clr-namespace:TEST.View.Controls"
      xmlns:metro="http://schemas.codeplex.com/elysium"
      xmlns:params="http://schemas.codeplex.com/elysium/params"
      mc:Ignorable="d"
      DataContext="{Binding Graphics, Source={StaticResource Locator}}" d:DesignHeight="800" d:DesignWidth="800"
    Title="GraphicsPage" Loaded="GraphicsPage_OnLoaded" Unloaded="GraphicsPage_OnUnloaded" MouseLeftButtonDown="Page_MouseLeftButtonDown" MouseLeftButtonUp="Page_MouseLeftButtonUp" PreviewMouseMove="Page_PreviewMouseMove">

    <Grid x:Name="GrdPage" PreviewMouseDown="GrdPage_OnPreviewMouseDown" PreviewMouseWheel="GrdPage_OnPreviewMouseWheel"
          PreviewMouseMove="GrdPage_OnPreviewMouseMove" PreviewTouchDown="GrdPage_OnPreviewTouchDown">
        <Grid.Background>
            <ImageBrush Stretch="Fill" ImageSource="{Binding BackgroundImage,Mode=TwoWay}" />
        </Grid.Background>
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="60" />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>

        <StackPanel x:Name="spRetake" Margin="0,13,0,0">
            <Button Style="{DynamicResource BackButtonStyle}"  Click="ButtonTrigger" CommandParameter="{x:Static enums:ButtonTriggerType.GoBack}" Command="{x:Static NavigationCommands.BrowseBack}" />
            <TextBlock Text="Retake" Foreground="White" FontSize="15" HorizontalAlignment="Center" Margin="0,5,0,3" />
        </StackPanel>

        <Grid x:Name="GrdGraphics" Grid.Row="0" Grid.Column="1"  VerticalAlignment="Top">
            <Grid.ColumnDefinitions>

                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="Auto" />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>

                <RowDefinition />
                <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>
            <Grid x:Name="grdImage" Grid.Column="0" Row="1"  HorizontalAlignment="Center" VerticalAlignment="Top" Margin="10,20,10,10">
                <Grid HorizontalAlignment="Center" VerticalAlignment="Top">

          ///Image is render to this control  
                    <Image x:Name="ImgPhoto" Source="{Binding ImageSource}"  VerticalAlignment="Top" MaxHeight="1000" MaxWidth="1400" MouseLeftButtonDown="ImgPhoto_MouseLeftButtonDown" MouseLeftButtonUp="ImgPhoto_MouseLeftButtonUp" MouseMove="ImgPhoto_MouseMove" LostMouseCapture="ImgPhoto_LostMouseCapture" />
///image control
                </Grid>
                <common:ProgressRing x:Name="PrLoading" Margin="100" Width="50" Height="50" VerticalAlignment="Center" IsActive="True" Foreground="{StaticResource VioletBrush}" Visibility="{Binding IsProgressVisible, Mode=TwoWay, Converter={StaticResource BooleanToVisibilityConverter}}" />
            </Grid>
            <Grid Grid.Row="0" Grid.RowSpan="2" Grid.Column="1" Background="#99000000" Width="350"  HorizontalAlignment="Right">
                <Grid.RowDefinitions>
                    <RowDefinition Height="20" />
                    <RowDefinition Height="*" />
                </Grid.RowDefinitions>
                <Grid Grid.Row="1">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" />
                        <ColumnDefinition Width="Auto" />
                    </Grid.ColumnDefinitions>
                    <Grid x:Name="GrdBorders" Margin="0,1,5,0" Visibility="{Binding ElementName=RbBorders, Path=IsChecked, Mode=TwoWay, Converter={StaticResource BooleanToVisibilityConverter}}">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto" />
                            <RowDefinition Height="*" />
                            <RowDefinition Height="40" />
                        </Grid.RowDefinitions>
                        <Grid x:Name="GrdBorderTitle" Margin="5,0,0,10">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto" />
                                <ColumnDefinition Width="4" />
                                <ColumnDefinition Width="*" />
                            </Grid.ColumnDefinitions>
                            <StackPanel Background="{StaticResource GreenBrushTransparent}" Width="50" Height="45"  Orientation="Horizontal">
                                <Path Data="M0,9.6240009L6.6444809,9.6240009 6.6444809,13.513288 3.8906012,13.513288 3.8906012,52.242962 50.401927,52.242962 50.401927,49.327709 54.29,49.327709 54.29,56.134999 0,56.134999z M13.596372,3.8918467L13.596372,42.622032 60.1081,42.622032 60.1081,3.8918467z M9.7070002,0L64.000003,0 64.000003,46.509999 9.7070002,46.509999z" Stretch="Uniform" Fill="#FFFFFFFF" Width="28" Height="28" Margin="5,0,0,0" RenderTransformOrigin="0.5,0.5" />
                            </StackPanel>
                            <StackPanel Grid.Column="2" Background="{StaticResource GreenBrushTransparent}" Orientation="Horizontal">
                                <TextBlock Text="Borders" FontSize="22" FontWeight="Light" Foreground="White" VerticalAlignment="Center" Margin="10,0,0,0" />
                            </StackPanel>
                        </Grid>
                        <ListView x:Name="LstBorders" Background="Transparent" Margin="10,0,0,0" Grid.Row="1"
                                  SelectionChanged="LstBorders_SelectionChanged" ItemTemplate="{StaticResource GrapicsBorders}" OverridesDefaultStyle="True" ItemContainerStyle="{StaticResource GraphicsBorderListViewItemStyle}" Style="{StaticResource BackgroundGalleryListViewStyle}" />
                    </Grid>

                    <Grid  Grid.Column="0" x:Name="GrdEffects" Margin="5,1,5,0" Visibility="{Binding ElementName=RbFilters, Path=IsChecked, Mode=TwoWay, Converter={StaticResource BooleanToVisibilityConverter}}">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto" />
                            <RowDefinition Height="*" />
                            <RowDefinition Height="40" />
                        </Grid.RowDefinitions>
                        <Grid x:Name="GrdEffectsTitle" Margin="0,0,0,10">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto" />
                                <ColumnDefinition Width="4" />
                                <ColumnDefinition Width="*" />
                            </Grid.ColumnDefinitions>
                            <StackPanel Background="{StaticResource GreenBrushTransparent}" Width="50" Height="45" Orientation="Horizontal">
                                <Path HorizontalAlignment="Left" Data="M44.02605,20.846C44.02605,20.846 63.682006,24.103257 63.682006,38.870418 63.682006,42.772187 63.682006,49.664208 63.682006,53.565377 63.682006,66.221799 51.658645,58.015256 51.658645,50.555524 51.658645,40.738351 60.340182,37.173087 56.365394,33.199718z M25.529025,0C34.740886,0,39.964213,12.976948,40.281676,22.477042L40.293128,23.153271 40.635634,23.496004C44.15071,27.013427 48.794879,31.660645 50.360019,33.226604 52.995978,35.863305 51.193019,38.789006 50.089023,39.892009 48.98503,40.995406 28.241208,61.738416 28.241208,61.738416 25.936236,64.043717 17.883273,59.726617 10.261396,52.099114 2.63244,44.474008 -1.684536,36.421304 0.6204343,34.116004L22.599233,12.137394C22.599233,12.137394 24.072108,10.731551 26.071624,10.752226 27.118989,10.763056 28.310851,11.165289 29.511216,12.365994L31.998191,14.858796C33.357127,19.144596 32.48714,22.803398 31.852197,24.675799 30.646153,25.4376 29.839215,26.7741 29.839215,28.308002 29.839215,30.683002 31.76516,32.610805 34.144168,32.610805 36.52415,32.610805 38.450095,30.683002 38.450095,28.308002 38.450095,26.808 37.681121,25.490899 36.519145,24.7214 36.644145,23.702499 36.722144,21.654397 36.354106,19.211597 36.354106,19.211597 36.823226,19.681035 37.592975,20.451304L37.670257,20.528639 37.615382,20.036525C36.595061,11.949274 32.102916,2.4615231 25.529025,2.4615231 17.491012,2.4615231 15.683008,10.664832 15.683008,13.53907L13.222004,13.53907C13.222004,8.3047702,16.56301,0,25.529025,0z" Stretch="Uniform" Fill="#FFFFFFFF" Width="27" Height="27" Margin="5,0,0,0" RenderTransformOrigin="0.5,0.5" />
                            </StackPanel>
                            <StackPanel Grid.Column="2" Background="{StaticResource GreenBrushTransparent}" Orientation="Horizontal">
                                <TextBlock Text="Filters" FontSize="22" FontWeight="Light" Foreground="White" VerticalAlignment="Center" Margin="10,0,0,0" />
                            </StackPanel>
                        </Grid>
                        <ListView x:Name="LstAdvancedEffect" Width="245" BorderBrush="White" Background="Transparent" Margin="10,0,0,0" Grid.Row="1"
                                  ItemTemplate="{StaticResource AdvancedEffect}" OverridesDefaultStyle="True" ItemContainerStyle="{StaticResource GraphicsEffectsListViewItemStyle}" Style="{StaticResource BackgroundGalleryListViewStyle}" />
                    </Grid>

                    <Grid Grid.Column="0" x:Name="GrdEdit" Margin="5,1,5,0" VerticalAlignment="Top" Visibility="{Binding ElementName=RbEdit, Path=IsChecked, Mode=TwoWay, Converter={StaticResource BooleanToVisibilityConverter}}">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto" />
                            <RowDefinition Height="*" />
                        </Grid.RowDefinitions>
                        <Grid x:Name="GrdEditTitle"  Margin="0,0,0,10">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto" />
                                <ColumnDefinition Width="4" />
                                <ColumnDefinition Width="*" />
                            </Grid.ColumnDefinitions>
                            <StackPanel  Background="{StaticResource GreenBrushTransparent}" Width="50" Height="45" Orientation="Horizontal">
                                <Path Data="M28.359835,24.709L34.154998,30.052877 27.489999,31.461998z M21.8047,9.3869993L35.634799,9.3869993 30.5925,14.785472 22.157498,14.785472 21.7942,26.555977C21.7942,26.555977,21.324199,34.340181,12.747299,33.399679L5.3957494,33.19948 5.3957494,66.641893C5.395749,67.386995,6.0026888,67.990496,6.7473091,67.990496L44.531299,67.990496C45.273398,67.990496,45.880099,67.386995,45.880099,66.641893L45.880099,26.531576 51.279998,21.086176 51.279998,66.641893C51.279998,70.368498,48.2578,73.386999,44.531299,73.386999L6.7473091,73.386999C3.020749,73.386999,-1.0840647E-06,70.368498,3.4106051E-13,66.641893L3.4106051E-13,32.391882 2.6718787,29.574478 2.674559,29.49638 16.676999,14.785472 16.637898,14.785472 12.894499,18.732675 16.816399,14.579372 16.872298,14.579372 16.996098,14.449471 17.007798,14.449471z M43.024932,5.7089984L52.443,14.399388 40.817794,27.000999 40.619792,25.005898 37.516936,23.951198 37.429824,21.838896 34.333331,21.018594 33.961013,18.635792 31.396998,18.307692z M49.488421,0.0016288757C49.906531,0.018204689,50.296157,0.1614809,50.599376,0.4401598L57.271087,6.5981958C58.080863,7.3442647,57.976867,8.7787952,57.033995,9.7973371L55.755431,11.184999 46.149001,2.3229232 47.428763,0.93428135C48.01562,0.298316,48.791575,-0.026000023,49.488421,0.0016288757z" Stretch="Uniform" Fill="#FFFFFFFF" Width="28" Height="28" Margin="5,0,5,0" RenderTransformOrigin="0.5,0.5" />
                            </StackPanel>
                            <StackPanel Grid.Column="2" Background="{StaticResource GreenBrushTransparent}" Orientation="Horizontal">
                                <TextBlock Text="Basic Edit" FontSize="22" FontWeight="Light" Foreground="White" VerticalAlignment="Center" Margin="10,0,0,0" />
                            </StackPanel>
                        </Grid>
                        <StackPanel Grid.Row="1" Orientation="Vertical" Margin="10,0,0,0">
                            <StackPanel Margin="0,0,0,8">
                                <TextBlock Text="Brightness" FontSize="18" Foreground="#929292" Margin="0,0,0,5" />
                                <Slider x:Name="Brightness" params:Slider.ThumbThickness="9" HorizontalAlignment="Stretch" Margin="0,5,0,5"  Minimum="-100" Maximum="100" Foreground="White" FontSize="18" FontWeight="Light" VerticalAlignment="Center" ValueChanged="Slider_ValueChanged" Style="{StaticResource SliderStyle}" />
                            </StackPanel>
                            <StackPanel Margin="0,0,0,8">
                                <TextBlock Text="Contrast" FontSize="18" Foreground="#929292" Margin="0,0,0,5" />
                                <Slider x:Name="Contrast" params:Slider.ThumbThickness="9" HorizontalAlignment="Stretch" Margin="0,5,0,5"  Minimum="-100" Maximum="100" Foreground="White" FontSize="18" FontWeight="Light" VerticalAlignment="Center" ValueChanged="Slider_ValueChanged" Style="{StaticResource SliderStyle}" />
                            </StackPanel>
                            <StackPanel Margin="0,0,0,8">
                                <TextBlock Text="Saturation" FontSize="18" Foreground="#929292" Margin="0,0,0,5" />
                                <Slider x:Name="Saturation" params:Slider.ThumbThickness="9" HorizontalAlignment="Stretch" Margin="0,5,0,5"  Minimum="-100" Maximum="100" Foreground="White" FontSize="18" FontWeight="Light" VerticalAlignment="Center" ValueChanged="Slider_ValueChanged" Style="{StaticResource SliderStyle}" />
                            </StackPanel>
                            <StackPanel Margin="0,0,0,8">
                                <TextBlock Text="Temp" FontSize="18" Foreground="#929292" Margin="0,0,0,5" />
                                <Slider x:Name="Temp" params:Slider.ThumbThickness="9" HorizontalAlignment="Stretch" Margin="0,5,0,5"  Minimum="-100" Maximum="100" Foreground="White" FontSize="18" FontWeight="Light" VerticalAlignment="Center" ValueChanged="Slider_ValueChanged" Style="{StaticResource SliderStyle}" />
                            </StackPanel>
                            <StackPanel Margin="0,0,0,8">
                                <TextBlock Text="Tint" FontSize="18" Foreground="#929292" Margin="0,0,0,5" />
                                <Slider x:Name="Tint" params:Slider.ThumbThickness="9" HorizontalAlignment="Stretch" Margin="0,5,0,5"  Minimum="-100" Maximum="100" Foreground="White" FontSize="18" FontWeight="Light" VerticalAlignment="Center" ValueChanged="Slider_ValueChanged" Style="{StaticResource SliderStyle}" />
                            </StackPanel>
                            <StackPanel Margin="0,0,0,8">
                                <TextBlock Text="Sharpen / Blur" FontSize="18" Foreground="#929292" Margin="0,0,0,5" />
                                <Slider x:Name="Blur" params:Slider.ThumbThickness="9" HorizontalAlignment="Stretch" Margin="0,5,0,5"  Minimum="-100" Maximum="100" Foreground="White" FontSize="18" FontWeight="Light" VerticalAlignment="Center" ValueChanged="Slider_ValueChanged" Style="{StaticResource SliderStyle}" />
                            </StackPanel>
                        </StackPanel>
                    </Grid>

                    <StackPanel Grid.Column="1" HorizontalAlignment="Right">

                        <RadioButton x:Name="RbFilters" Margin="0,0,0,10" Height="55" IsChecked="{Binding IsFilterChecked,Mode=TwoWay}" Style="{StaticResource EffectsRadioButtonStyle}" Visibility="{Binding IsFilter,Mode=TwoWay,Converter={StaticResource BooleanToVisibilityConverter}}">
                            <RadioButton.ContentTemplate>
                                <DataTemplate>
                                    <StackPanel Orientation="Vertical">
                                        <Path HorizontalAlignment="Left" Data="M44.02605,20.846C44.02605,20.846 63.682006,24.103257 63.682006,38.870418 63.682006,42.772187 63.682006,49.664208 63.682006,53.565377 63.682006,66.221799 51.658645,58.015256 51.658645,50.555524 51.658645,40.738351 60.340182,37.173087 56.365394,33.199718z M25.529025,0C34.740886,0,39.964213,12.976948,40.281676,22.477042L40.293128,23.153271 40.635634,23.496004C44.15071,27.013427 48.794879,31.660645 50.360019,33.226604 52.995978,35.863305 51.193019,38.789006 50.089023,39.892009 48.98503,40.995406 28.241208,61.738416 28.241208,61.738416 25.936236,64.043717 17.883273,59.726617 10.261396,52.099114 2.63244,44.474008 -1.684536,36.421304 0.6204343,34.116004L22.599233,12.137394C22.599233,12.137394 24.072108,10.731551 26.071624,10.752226 27.118989,10.763056 28.310851,11.165289 29.511216,12.365994L31.998191,14.858796C33.357127,19.144596 32.48714,22.803398 31.852197,24.675799 30.646153,25.4376 29.839215,26.7741 29.839215,28.308002 29.839215,30.683002 31.76516,32.610805 34.144168,32.610805 36.52415,32.610805 38.450095,30.683002 38.450095,28.308002 38.450095,26.808 37.681121,25.490899 36.519145,24.7214 36.644145,23.702499 36.722144,21.654397 36.354106,19.211597 36.354106,19.211597 36.823226,19.681035 37.592975,20.451304L37.670257,20.528639 37.615382,20.036525C36.595061,11.949274 32.102916,2.4615231 25.529025,2.4615231 17.491012,2.4615231 15.683008,10.664832 15.683008,13.53907L13.222004,13.53907C13.222004,8.3047702,16.56301,0,25.529025,0z" Stretch="Uniform" Fill="#FFFFFFFF" Width="27" Height="27" Margin="0,0,0,0" RenderTransformOrigin="0.5,0.5" />
                                        <TextBlock Text="Filters" Foreground="White" HorizontalAlignment="Center" Margin="0,0,0,3" />
                                    </StackPanel>
                                </DataTemplate>
                            </RadioButton.ContentTemplate>
                        </RadioButton>
                        <RadioButton x:Name="RbBorders" Margin="0,0,0,10" Width="60" Height="55" IsChecked="{Binding IsBorderChecked,Mode=TwoWay}" Style="{StaticResource EffectsRadioButtonStyle}" Visibility="{Binding IsBorder,Mode=TwoWay,Converter={StaticResource BooleanToVisibilityConverter}}">
                            <RadioButton.ContentTemplate>
                                <DataTemplate>
                                    <StackPanel Orientation="Vertical">
                                        <Path Data="M0,9.6240009L6.6444809,9.6240009 6.6444809,13.513288 3.8906012,13.513288 3.8906012,52.242962 50.401927,52.242962 50.401927,49.327709 54.29,49.327709 54.29,56.134999 0,56.134999z M13.596372,3.8918467L13.596372,42.622032 60.1081,42.622032 60.1081,3.8918467z M9.7070002,0L64.000003,0 64.000003,46.509999 9.7070002,46.509999z" Stretch="Uniform" Fill="#FFFFFFFF" Width="28" Height="28" Margin="0,0,0,0" RenderTransformOrigin="0.5,0.5" />
                                        <TextBlock Text="Borders" Foreground="White" HorizontalAlignment="Center" Margin="0,0,0,3" />
                                    </StackPanel>
                                </DataTemplate>
                            </RadioButton.ContentTemplate>
                        </RadioButton>
                        <RadioButton x:Name="RbEdit" Height="55" Margin="0,0,0,10" IsChecked="{Binding IsEditChecked,Mode=TwoWay}" Style="{StaticResource EffectsRadioButtonStyle}" Visibility="{Binding IsEdit,Mode=TwoWay,Converter={StaticResource BooleanToVisibilityConverter}}">
                            <RadioButton.ContentTemplate>
                                <DataTemplate>
                                    <StackPanel Orientation="Vertical">
                                        <Path Data="M28.359835,24.709L34.154998,30.052877 27.489999,31.461998z M21.8047,9.3869993L35.634799,9.3869993 30.5925,14.785472 22.157498,14.785472 21.7942,26.555977C21.7942,26.555977,21.324199,34.340181,12.747299,33.399679L5.3957494,33.19948 5.3957494,66.641893C5.395749,67.386995,6.0026888,67.990496,6.7473091,67.990496L44.531299,67.990496C45.273398,67.990496,45.880099,67.386995,45.880099,66.641893L45.880099,26.531576 51.279998,21.086176 51.279998,66.641893C51.279998,70.368498,48.2578,73.386999,44.531299,73.386999L6.7473091,73.386999C3.020749,73.386999,-1.0840647E-06,70.368498,3.4106051E-13,66.641893L3.4106051E-13,32.391882 2.6718787,29.574478 2.674559,29.49638 16.676999,14.785472 16.637898,14.785472 12.894499,18.732675 16.816399,14.579372 16.872298,14.579372 16.996098,14.449471 17.007798,14.449471z M43.024932,5.7089984L52.443,14.399388 40.817794,27.000999 40.619792,25.005898 37.516936,23.951198 37.429824,21.838896 34.333331,21.018594 33.961013,18.635792 31.396998,18.307692z M49.488421,0.0016288757C49.906531,0.018204689,50.296157,0.1614809,50.599376,0.4401598L57.271087,6.5981958C58.080863,7.3442647,57.976867,8.7787952,57.033995,9.7973371L55.755431,11.184999 46.149001,2.3229232 47.428763,0.93428135C48.01562,0.298316,48.791575,-0.026000023,49.488421,0.0016288757z" Stretch="Uniform" Fill="#FFFFFFFF" Width="28" Height="28" Margin="0,0,5,0" RenderTransformOrigin="0.5,0.5" />
                                        <TextBlock Text="Edit" Foreground="White" HorizontalAlignment="Center" Margin="0,0,0,3" />
                                    </StackPanel>
                                </DataTemplate>
                            </RadioButton.ContentTemplate>
                        </RadioButton>
                    </StackPanel>
                </Grid>
            </Grid>
        </Grid>
        <Border Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" BorderBrush="{StaticResource GreenBrush}" BorderThickness="0,2,0,0" VerticalAlignment="Bottom" HorizontalAlignment="Stretch" Background="#4C000000" Height="75">
            <Button Height="40" Width="100" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,10,10,0" Content="Next" Style="{DynamicResource NextButtonStyle}"  Click="ButtonTrigger" CommandParameter="{x:Static enums:ButtonTriggerType.Next}" />
        </Border>
        <MediaElement Grid.Row="0" Grid.Column="0" x:Name="MdeBackgroundMusic" Source="{Binding BackgroundMusic}"  Visibility="Collapsed" LoadedBehavior="Play" UnloadedBehavior="Manual" MediaEnded="MdeBackgroundMusic_OnMediaEnded" />
    </Grid>
</Page>

Codebehind

//List for added points
public List<Point> DrawPoint = new List<Point>();

and my mouse move event like this

private void Page_PreviewMouseMove(object sender, MouseEventArgs e)
{
 if (draw)
    {
     if (DrawPoint .Count > 0)
      {
         var exist = DrawPoint .Any(i => i == e.Getpostion(null));
       if (!exist)
          {

              DrawPoint .Add(e.Getpostion(null));
          }
         else
        {
         DrawPoints.Add(e.Getpostion(null));
         }

        }
    }
}

at that time i was draw the points to the render method like this

if (_point != null){
SolidColorBrush aBrush = new SolidColorBrush(_d2DContext, SharpDX.Color.Red);

  //looped every added point in user
  foreach (var point in _point)
   {

     _d2DContext.FillEllipse(new Ellipse(new Vector2((float)point.X, (float)point.Y), 10, 10), aBrush);

    }
}

but drawed points its wrong what is iam missing. please help me outenter image description here

Image Notes

Redpoint is now brush the point using above code

X Mark indicates mouse postion on the image.

c# wpf sharpdx
Original Q&A
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AudioBubble On BEST ANSWER

I have faced similar Issue when i working my last project

in your Move Event

//get current touch point
    var currentPoint = e.GetTouchPoint(this);
   // calculate screen margin for grid image left
     var x = (currentPoint.Bounds.X - (spRetake.ActualWidth + grdImage.Margin.Left)) / grdImage.ActualWidth;
    var y = (currentPoint.Bounds.Y - grdImage.Margin.Top) / grdImage.ActualHeight;

 DrawPoints.Add(new System.Windows.Point(x,y));

And Your Device Class you Need to calculate rendering device width and height also you should calculate orginal image width and height rendering image actual width

// original dimensions
var width = CurrentBitmapSize.Width;
var height = CurrentBitmapSize.Height;

// Find the longest and shortest dimentions
var longestDimension = (width > height) ? width : height;
var shortestDimension = (width < height) ? width : height;

var factor = ((double)longestDimension) / (double)shortestDimension;
// Set width as max
 double newWidth = (float)_d2DContext.PixelSize.Width;
var newHeight = (float)_d2DContext.PixelSize.Width / factor;

//If height is actually greater, then we reset it to use height instead of width
if (width < height)
{
 newWidth = (float)_d2DContext.PixelSize.Height / factor;
  newHeight = (float)_d2DContext.PixelSize.Height;
}

 _drawBrush = new SolidColorBrush(d2DContext, SharpDX.Color.Blue);
 var pWidth = _d2DContext.PixelSize.Width;
 var pHeight = _d2DContext.PixelSize.Height;
int elipseWidth = 10;
 int elipseheight = 15;
foreach (var point in MousePoints.Distinct().ToList())
 {
 var x = (point.X * pWidth) + (elipseWidth / 2);
var y = (point.Y * pHeight) + (elipseheight / 2);

 var ellipseCenter = new Vector2((float)x, (float)y);
 var ellipse = new Ellipse(ellipseCenter, elipseWidth, elipseheight);
//omit if the point not in image container
 if (newWidth >= x && newHeight >= y + 2)
  {
                            d2DContext.FillEllipse(ellipse, _drawBrush);
}
}

i think its should worked for you...Any Queries Comment It..

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