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  • how to remove or change background fills in all tables in a microsoft word document

    - by PA.
    I have a bunch of large documents, with many tables that have different and inconsistent fill styles - some of them are not readable in black and white when printed. I cannot change the background fill for all the tables at once. The problem I have is that when I open such a document, and Select All, the Table Properties are inactive. Do you know a technique for selecting all the tables, or a method for applying global format of tables, with a script or some other way?

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  • Does PS3 browser handle gzipping?

    - by Yegor
    Not sure if this would be a correct place to post, but here it goes. Ive been getting reports form people who try accessing my site from a PS3, that every page appears like a jumble of random characters on a white background, sorta like echoing out a gzipped string as plain text. Im using nginx. Does the PS3 browser not support gzipping? Anything I can do except disabling it?

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  • How to select all text inside text area of code field on web pages

    - by Moorage
    In all the forums web pages the download links are given inside the [code] braces that looks like text area with white background. When the download links are in large numbers then there are scroll bars. I find it difficult to scroll up and then select and then drag down to select all links. Is there any way to select all , when I click on select all on right click then it usually selects the text from whole page not from that code segment

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  • image filter that spits out pi

    - by patrickinmpls
    I've seen this before but I forgot what's its called. Does anyone know of software that takes a picture and spits out an image of the number pi, ie. 3.14... not the symbol? It basically kinda looks like ascii art but the numbers are different shades of gray so it is like a black and white photo. Thanks!

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  • Limit YouTube to specific videos

    - by Neil Barnwell
    A friend of mine has a son who likes to watch YouTube, but she would like to limit his access with some sort of white-list. This is more strict than simple over-18 stuff. I've thought of a static webpage with embedded video players on, but I don't know how to limit general search access to YouTube.

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  • Will this netbook allow me to run mutiple programs without issues?

    - by erik
    I'd like to use a netbook to run mIRC skype Messenger pretty much all at the same time. It this netbook a good choice? http://www.notebookzone.co.za/default/sony-vpc-w216.html Quick Overview Intel Atom N450 (1.66GHz), 2GB Ram /320GB HDD, 10.1" LCD-WXGA:1366 x 768, LED, Windows 7 Starter 32bit, Only 1.19Kg, Web Cam, Wireless, BT The combination of high-resolution wide 10.1" screen and Isolation Keyboard helps to put the Internet at your fingertips anytime you want it. Available in : white / pink / blue / brown

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  • HP Pavillion dv5 Notebook Repair Question?

    - by HeLp
    My screen only comes on when my screen is half way up and it sometime turns off or turns white I think I need to connect a loose wire from the screen but how do I open the laptop to reconnect the screens loose wires? I have an infinity screen with no screws on it please help

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  • Can I keep stream info displayed while in a full screen visualization in VLC?

    - by Daniel
    I am streaming an internet radio station through vlc. When its playing in the player, the title bar shows the song title and artist. When going full screen, it shows the song title/artist for a brief moment in white at the bottom of the screen. But, that quickly disappears. It does not come back up when the song changes. Is there a way to keep the stream info on screen while in full screen visualization mode in vlc?

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  • Vlan on astaro 120

    - by Crash893
    (I'm not 100% sure where networking/router questions go this is my best guess) I have a astaro (sophos) white UTM 120 router for work I also have about 11 Voip phones with an externaly hosted pbx (company name = pingtone) Is there any advantage to setting up the phones on a vlan vs making a qos rule that all traffic to my tftp server gets right of way? networking is still a little soft to me Thanks

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  • Application icons not displayed correctly

    - by shadeMe
    Lately, 7Stacks and Standalone Stacks have been unable to display the icon for any .exe file. They simply show the default icon instead (the white file icon). Rebuilding/fixing the icon cache haven't fixed the problem. Any ides on how to ? I use Windows 7.

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  • Adjust colours in a PDF

    - by user1035
    I'd like to make colour adjustments to an existing PDF file, the equivalent of Photoshop's adjustments, and save a new version with the altered colours. I'm after more than a colourspace conversion. I'd like to take a file that's black and white, and convert it into green, blue, yellow, pink etc versions. It's upwards of 100 pages full of text and graphic elements, so doing it by hand isn't really an option. Is there any way of achieving this?

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  • How can I identify a mystery tray icon in Windows 7?

    - by Mark
    A new icon has appeared in my tray in Windows 7 recently - a black square with a white A in it: It doesn't have any tooltip or right-click context menu so I haven't been able to identify which process it belongs to. I tried using the "Find Window's Process" tool in Process Explorer but that won't identify individual tray icons. Short of killing processes until it disappears, is there a good way to identify which process this icon belongs to?

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  • Hashed pattern in bargraphs - MS excel

    - by user1189851
    I am drawing graphs for a paper that supports only black and white graphs. I need to show more than 3 histograms and want to have different patterns on them like hash, dotted, double hashed etc instead of different colors in the legend. I am using MS Excel 2007. I tried but dont find a way except for the option available in design tab that I find when I double click on the chart area( These are shades of grey color and I want patterns like hashing, dots etc). Thanks in advance,

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  • windows 7 start menu showing incorrect data

    - by madmik3
    Hi, I've tried to rebuild my search index but it does not seem to help. When i search for anything even command I either get an empty list or a list of short cuts with the names Programs Documents Files ... They all have the default white paper icon. If I click on them I get an error message that says Internet security settings prevented one or more files from being opened. Any ideas? thanks

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  • WPF ComboBox Binding breaks when using ControlTemplate

    - by Mitch
    I have a WPF ComboBox that has been working fine until I recently created a ControlTemplate for it to enable me to change the color of the DropDown arrow. The ComboBox still works correctly except the Bound Text value now just shows the name of the Business Object rather than the bound value. I guess that binding like Text="{Binding Path=CaseDateRange}" no longer works when using a ControlTemplate, yet the ItemsSource binding on the dropdown seems to still work fine. Can anyone offer some help with how I need to change my binding when using a ControlTemplate. The code for the ControlTemplate and ComboBox is as follows <ControlTemplate x:Key="ComboBoxControlTemplate1" TargetType="{x:Type ComboBox}"> <Grid x:Name="MainGrid" SnapsToDevicePixels="True"> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"/> <ColumnDefinition MinWidth="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}" Width="0"/> </Grid.ColumnDefinitions> <Popup x:Name="PART_Popup" AllowsTransparency="True" Grid.ColumnSpan="2" IsOpen="{Binding IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom" OpacityMask="#FF2A3D64"> <Microsoft_Windows_Themes:SystemDropShadowChrome x:Name="Shdw" Color="Transparent" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{Binding ActualWidth, ElementName=MainGrid}"> <Border x:Name="DropDownBorder" BorderBrush="White" BorderThickness="1" CornerRadius="3" Background="{DynamicResource DialogDarkBlue}"> <ScrollViewer x:Name="DropDownScrollViewer" > <Grid RenderOptions.ClearTypeHint="Enabled"> <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0"> <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=DropDownBorder}" Height="{Binding ActualHeight, ElementName=DropDownBorder}" Width="{Binding ActualWidth, ElementName=DropDownBorder}"/> </Canvas> <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/> </Grid> </ScrollViewer> </Border> </Microsoft_Windows_Themes:SystemDropShadowChrome> </Popup> <ToggleButton BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Foreground="White"> <ToggleButton.Style> <Style TargetType="{x:Type ToggleButton}"> <Setter Property="OverridesDefaultStyle" Value="True"/> <Setter Property="IsTabStop" Value="False"/> <Setter Property="Focusable" Value="False"/> <Setter Property="ClickMode" Value="Press"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ToggleButton}"> <Microsoft_Windows_Themes:ButtonChrome x:Name="Chrome" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}" SnapsToDevicePixels="True"> <Grid HorizontalAlignment="Right" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"> <Path x:Name="Arrow" Data="M0,0L3.5,4 7,0z" Fill="White" HorizontalAlignment="Center" Margin="3,1,0,0" VerticalAlignment="Center"/> </Grid> </Microsoft_Windows_Themes:ButtonChrome> <ControlTemplate.Triggers> <Trigger Property="IsChecked" Value="True"> <Setter Property="RenderPressed" TargetName="Chrome" Value="True"/> </Trigger> <Trigger Property="IsEnabled" Value="False"> <Setter Property="Fill" TargetName="Arrow" Value="#FFAFAFAF"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> </ToggleButton.Style> </ToggleButton> <ContentPresenter ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}" Content="{TemplateBinding SelectionBoxItem}" ContentStringFormat="{TemplateBinding SelectionBoxItemStringFormat}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" IsHitTestVisible="False" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/> </Grid> <ControlTemplate.Triggers> <Trigger Property="HasDropShadow" SourceName="PART_Popup" Value="True"> <Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/> <Setter Property="Color" TargetName="Shdw" Value="#71000000"/> </Trigger> <Trigger Property="HasItems" Value="False"> <Setter Property="Height" TargetName="DropDownBorder" Value="95"/> </Trigger> <Trigger Property="IsEnabled" Value="False"> <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/> <Setter Property="Background" Value="#FFF4F4F4"/> </Trigger> <Trigger Property="IsGrouping" Value="True"> <Setter Property="ScrollViewer.CanContentScroll" Value="False"/> </Trigger> <Trigger Property="CanContentScroll" SourceName="DropDownScrollViewer" Value="False"> <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/> <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> And the ComboBox is <ComboBox x:Name="cboSelectedCase" Text="{Binding Path=CaseDateRange}" DisplayMemberPath="CaseDateRange" SelectedValuePath="CaseID" Template="{DynamicResource ComboBoxControlTemplate1}" />

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  • Am I going about this the right way?

    - by Psytronic
    Hey Guys, I'm starting a WPF project, and just finished the base of the UI, it seems very convoluted though, so I'm not sure if I've gone around laying it out in the right way. I don't want to get to start developing the back-end and realise that I've done the front wrong, and make life harder for myself. Coming from a background of <DIV's and CSS to style this is a lot different, and really want to get it right from the start. Essentially it's a one week calendar (7 days, Mon-Sunday, defaulting to the current week.) Which will eventually link up to a DB and if I have an appointment for something on this day it will show it in the relevant day. I've opted for a Grid rather than ListView because of the way it will work I will not be binding the results to a collection or anything along those lines. Rather I will be filling out a Combo box within the canvas for each day (yet to be placed in the code) for each event and on selection it will show me further details. XAML: <Window x:Class="WOW_Widget.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:Extensions="clr-namespace:WOW_Widget" DataContext="{Binding RelativeSource={RelativeSource Self}}" Title="Window1" Height="239" Width="831" <Window.Resources <LinearGradientBrush x:Key="NormalBrush" StartPoint="0,0" EndPoint="0,1" <GradientBrush.GradientStops <GradientStopCollection <GradientStop Offset="1.0" Color="White"/ <GradientStop Offset="0.0" Color="LightSlateGray"/ </GradientStopCollection </GradientBrush.GradientStops </LinearGradientBrush <LinearGradientBrush x:Key="grdDayHeader" StartPoint="0,0" EndPoint="0,1" <GradientBrush.GradientStops <GradientStopCollection <GradientStop Offset="0.0" Color="Peru" / <GradientStop Offset="1.0" Color="White" / </GradientStopCollection </GradientBrush.GradientStops </LinearGradientBrush <LinearGradientBrush x:Key="grdToday" StartPoint="0,0" EndPoint="0,1" <GradientBrush.GradientStops <GradientStopCollection <GradientStop Offset="0.0" Color="LimeGreen"/ <GradientStop Offset="1.0" Color="DarkGreen" / </GradientStopCollection </GradientBrush.GradientStops </LinearGradientBrush <Style TargetType="{x:Type GridViewColumnHeader}" <Setter Property="Background" Value="Khaki" / </Style <Style x:Key="DayHeader" TargetType="{x:Type Label}" <Setter Property="Background" Value="{StaticResource grdDayHeader}" / <Setter Property="Width" Value="111" / <Setter Property="Height" Value="25" / <Setter Property="HorizontalContentAlignment" Value="Center" / </Style <Style x:Key="DayField" <Setter Property="Canvas.Width" Value="111" / <Setter Property="Canvas.Height" Value="60" / <Setter Property="Canvas.Background" Value="White" / </Style <Style x:Key="Today" <Setter Property="Canvas.Background" Value="{StaticResource grdToday}" / </Style <Style x:Key="CalendarColSpacer" <Setter Property="Canvas.Width" Value="1" / <Setter Property="Canvas.Background" Value="Black" / </Style <Style x:Key="CalendarRowSpacer" <Setter Property="Canvas.Height" Value="1" / <Setter Property="Canvas.Background" Value="Black" / </Style </Window.Resources <Grid Background="{StaticResource NormalBrush}" <Border BorderBrush="Black" BorderThickness="1" Width="785" Height="86" Margin="12,12,12,104" <Canvas Height="86" Width="785" VerticalAlignment="Top" <Grid <Grid.ColumnDefinitions <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / <ColumnDefinition / </Grid.ColumnDefinitions <Grid.RowDefinitions <RowDefinition / <RowDefinition / <RowDefinition / </Grid.RowDefinitions <Label Grid.Column="0" Grid.Row="0" Content="Monday" Style="{StaticResource DayHeader}" / <Canvas Grid.Column="1" Grid.RowSpan="3" Grid.Row="0" Style="{StaticResource CalendarColSpacer}" / <Label Grid.Column="2" Grid.Row="0" Content="Tuesday" Style="{StaticResource DayHeader}" / <Canvas Grid.Column="3" Grid.RowSpan="3" Grid.Row="0" Style="{StaticResource CalendarColSpacer}" / <Label Grid.Column="4" Grid.Row="0" Content="Wednesday" Style="{StaticResource DayHeader}" / <Canvas Grid.Column="5" Grid.RowSpan="3" Grid.Row="0" Style="{StaticResource CalendarColSpacer}" / <Label Grid.Column="6" Grid.Row="0" Content="Thursday" Style="{StaticResource DayHeader}" / <Canvas Grid.Column="7" Grid.RowSpan="3" Grid.Row="0" Style="{StaticResource CalendarColSpacer}" / <Label Grid.Column="8" Grid.Row="0" Content="Friday" Style="{StaticResource DayHeader}" / <Canvas Grid.Column="9" Grid.RowSpan="3" Grid.Row="0" Style="{StaticResource CalendarColSpacer}" / <Label Grid.Column="10" Grid.Row="0" Content="Saturday" Style="{StaticResource DayHeader}" / <Canvas Grid.Column="11" Grid.RowSpan="3" Grid.Row="0" Style="{StaticResource CalendarColSpacer}" / <Label Grid.Column="12" Grid.Row="0" Content="Sunday" Style="{StaticResource DayHeader}" / <Canvas Grid.Column="0" Grid.ColumnSpan="13" Grid.Row="1" Style="{StaticResource CalendarRowSpacer}" / <Canvas Grid.Column="0" Grid.Row="2" Margin="0" Style="{StaticResource DayField}" <Label Name="lblMondayDate" / </Canvas <Canvas Grid.Column="2" Grid.Row="2" Margin="0" Style="{StaticResource DayField}" <Label Name="lblTuesdayDate" / </Canvas <Canvas Grid.Column="4" Grid.Row="2" Margin="0" Style="{StaticResource DayField}" <Label Name="lblWednesdayDate" / </Canvas <Canvas Grid.Column="6" Grid.Row="2" Margin="0" Style="{StaticResource DayField}" <Label Name="lblThursdayDate" / </Canvas <Canvas Grid.Column="8" Grid.Row="2" Margin="0" Style="{StaticResource DayField}" <Label Name="lblFridayDate" / </Canvas <Canvas Grid.Column="10" Grid.Row="2" Margin="0" Style="{StaticResource DayField}" <Label Name="lblSaturdayDate" / </Canvas <Canvas Grid.Column="12" Grid.Row="2" Margin="0" Style="{StaticResource DayField}" <Label Name="lblSundayDate" / </Canvas </Grid </Canvas </Border <Canvas Height="86" HorizontalAlignment="Right" Margin="0,0,12,12" Name="canvas1" VerticalAlignment="Bottom" Width="198"</Canvas </Grid </Window CS: public partial class Window1 : Window { private DateTime today = new DateTime(); private Label[] Dates = new Label[7]; public Window1() { DateTime start = today = DateTime.Now; int day = (int)today.DayOfWeek; while (day != 1) { start = start.Subtract(new TimeSpan(1, 0, 0, 0)); day--; } InitializeComponent(); Dates[0] = lblMondayDate; Dates[1] = lblTuesdayDate; Dates[2] = lblWednesdayDate; Dates[3] = lblThursdayDate; Dates[4] = lblFridayDate; Dates[5] = lblSaturdayDate; Dates[6] = lblSundayDate; FillWeek(start); } private void FillWeek(DateTime start) { for (int d = 0; d < Dates.Length; d++) { TimeSpan td = new TimeSpan(d, 0, 0, 0); DateTime _day = start.Add(td); if (_day.Date == today.Date) { Canvas dayCanvas = (Canvas)Dates[d].Parent; dayCanvas.Style = (Style)this.Resources["Today"]; } Dates[d].Content = (int)start.Add(td).Day; } } } Thanks for any tips you guys can give Psytronic

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  • Rails, gmail: howto get plain/text from body

    - by atmorell
    Hello, I am loading am email with IMAP and parsing it with mail. This works very well, however the mail.body.decoded field contains a lot of formatting. How do I dig out the plain/txt body of the email - ignore attachements, formatting etc. It works fine if I try with an email without html. source = imap.uid_fetch(uid, ['RFC822']).first.attr['RFC822'] mail = Mail.new(source) This body content looks like this: Mail::Body:0x7f36ed468270 @epilogue="", @boundary="_004_4C49171DCB8C4540844E69DD39FDD98Ffirm_", @encoding="7bit", @raw_source="--_004_4C49171DCB8C4540844E69DD39FDD98Ffirm_\r\nContent-Type: multipart/alternative;\r\n\tboundary=\"_000_4C49171DCB8C4540844E69DD39FDD98Ffirm_\"\r\n\r\n--_000_4C49171DCB8C4540844E69DD39FDD98Ffirm_\r\nContent-Type: text/plain; charset=\"iso-8859-1\"\r\nContent-Transfer-Encoding: quoted-printable\r\n\r\ndasdsasda\r\n\r\n\r\n\r\nMed venlig hilsen / Med V=E4nlig H=E4lsning / Best Regards\r\r\nAsbj=F8rn Toke Morell. .\r\n+45 7020 0160\r\n+45 2152 0015\r\n[cid:[email protected]]\r\nhttp://www..dk\r\n\r\n\r\n--_000_4C49171DCB8C4540844E69DD39FDD98Ffirm_\r\nContent-Type: text/html; charset=\"iso-8859-1\"\r\nContent-Transfer-Encoding: quoted-printable\r\n\r\n<html>headheadbody style3D"word-wrap: break-word; -webkit-nbsp-mode:=\r\n space; -webkit-line-break: after-white-space; ">dasdsasda<br><div apple-co=\r\nntent-edited=3D"true">\r\n<span class=3D"Apple-style-span" style=3D"border-collapse: separate; color:=\r\n rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: norma=\r\nl; font-variant: normal; font-weight: normal; letter-spacing: normal; line-=\r\nheight: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transf=\r\norm: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-borde=\r\nr-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-te=\r\nxt-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-tex=\r\nt-stroke-width: 0px; "><span class=3D"Apple-style-span" style=3D"font-famil=\r\ny: Calibri, sans-serif; font-size: 15px; "><span class=3D"Apple-style-span"=\r\n style=3D"border-collapse: separate; color: rgb(0, 0, 0); font-family: Helv=\r\netica; font-size: medium; font-style: normal; font-variant: normal; font-we=\r\night: normal; letter-spacing: normal; line-height: normal; orphans: 2; text=\r\n-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-sp=\r\nacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical=\r\n-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-=\r\nadjust: auto; -webkit-text-stroke-width: 0px; "><span class=3D"Apple-style-=\r\nspan" style=3D"font-family: Calibri, sans-serif; font-size: 15px; "><div st=\r\nyle=3D"margin-top: 0cm; margin-right: 0cm; margin-bottom: 0.0001pt; margin-=\r\nleft: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; "><font class=\r\n=3D"Apple-style-span" color=3D"#000080" face=3D"'Times New Roman', serif" s=\r\nize=3D"3"><span class=3D"Apple-style-span" style=3D"font-size: 13px; "><br =\r\nclass=3D"Apple-interchange-newline"><br></span></font></div><div style=3D"m=\r\nargin-top: 0cm; margin-right: 0cm; margin-bottom: 0.0001pt; margin-left: 0c=\r\nm; font-size: 11pt; font-family: Calibri, sans-serif; "><font class=3D"Appl=\r\ne-style-span" color=3D"#000080" face=3D"'Times New Roman', serif" size=3D"3=\r\n"><span class=3D"Apple-style-span" style=3D"font-size: 13px; "><br></span><=\r\n/font></div><div style=3D"margin-top: 0cm; margin-right: 0cm; margin-bottom=\r\n: 0.0001pt; margin-left: 0cm; font-size: 11pt; font-family: Calibri, sans-s=\r\nerif; "><span style=3D"font-size: 10pt; font-family: 'Times New Roman', ser=\r\nif; color: navy; ">Med venlig hilsen / Med V=E4nlig H=E4lsning / Best Regar=\r\nds&nbsp;<br>firm<br>Asbj=F8rn Toke Morell... This is the ony relevant from information from the body: 'ndasdsasda\r\n\r\n\r\n\r\nMed venlig hilsen / Med V=E4nlig H=E4lsning / Best Regards\r\r\nAsbj=F8rn Toke Morell' Any ideas?

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  • Why is my unsafe code block slower than my safe code?

    - by jomtois
    I am attempting to write some code that will expediently process video frames. I am receiving the frames as a System.Windows.Media.Imaging.WriteableBitmap. For testing purposes, I am just applying a simple threshold filter that will process a BGRA format image and assign each pixel to either be black or white based on the average of the BGR pixels. Here is my "Safe" version: public static void ApplyFilter(WriteableBitmap Bitmap, byte Threshold) { // Let's just make this work for this format if (Bitmap.Format != PixelFormats.Bgr24 && Bitmap.Format != PixelFormats.Bgr32) { return; } // Calculate the number of bytes per pixel (should be 4 for this format). var bytesPerPixel = (Bitmap.Format.BitsPerPixel + 7) / 8; // Stride is bytes per pixel times the number of pixels. // Stride is the byte width of a single rectangle row. var stride = Bitmap.PixelWidth * bytesPerPixel; // Create a byte array for a the entire size of bitmap. var arraySize = stride * Bitmap.PixelHeight; var pixelArray = new byte[arraySize]; // Copy all pixels into the array Bitmap.CopyPixels(pixelArray, stride, 0); // Loop through array and change pixels to black or white based on threshold for (int i = 0; i < pixelArray.Length; i += bytesPerPixel) { // i=B, i+1=G, i+2=R, i+3=A var brightness = (byte)((pixelArray[i] + pixelArray[i + 1] + pixelArray[i + 2]) / 3); var toColor = byte.MinValue; // Black if (brightness >= Threshold) { toColor = byte.MaxValue; // White } pixelArray[i] = toColor; pixelArray[i + 1] = toColor; pixelArray[i + 2] = toColor; } Bitmap.WritePixels(new Int32Rect(0, 0, Bitmap.PixelWidth, Bitmap.PixelHeight), pixelArray, stride, 0); } Here is what I think is a direct translation using an unsafe code block and the WriteableBitmap Back Buffer instead of the forebuffer: public static void ApplyFilterUnsafe(WriteableBitmap Bitmap, byte Threshold) { // Let's just make this work for this format if (Bitmap.Format != PixelFormats.Bgr24 && Bitmap.Format != PixelFormats.Bgr32) { return; } var bytesPerPixel = (Bitmap.Format.BitsPerPixel + 7) / 8; Bitmap.Lock(); unsafe { // Get a pointer to the back buffer. byte* pBackBuffer = (byte*)Bitmap.BackBuffer; for (int i = 0; i < Bitmap.BackBufferStride*Bitmap.PixelHeight; i+= bytesPerPixel) { var pCopy = pBackBuffer; var brightness = (byte)((*pBackBuffer + *pBackBuffer++ + *pBackBuffer++) / 3); pBackBuffer++; var toColor = brightness >= Threshold ? byte.MaxValue : byte.MinValue; *pCopy = toColor; *++pCopy = toColor; *++pCopy = toColor; } } // Bitmap.AddDirtyRect(new Int32Rect(0,0, Bitmap.PixelWidth, Bitmap.PixelHeight)); Bitmap.Unlock(); } This is my first foray into unsafe code blocks and pointers, so maybe the logic is not optimal. I have tested both blocks of code on the same WriteableBitmaps using: var threshold = Convert.ToByte(op.Result); var copy2 = copyFrame.Clone(); Stopwatch stopWatch = new Stopwatch(); stopWatch.Start(); BinaryFilter.ApplyFilterUnsafe(copyFrame, threshold); stopWatch.Stop(); var unsafesecs = stopWatch.ElapsedMilliseconds; stopWatch.Reset(); stopWatch.Start(); BinaryFilter.ApplyFilter(copy2, threshold); stopWatch.Stop(); Debug.WriteLine(string.Format("Unsafe: {1}, Safe: {0}", stopWatch.ElapsedMilliseconds, unsafesecs)); So I am analyzing the same image. A test run of an incoming stream of video frames: Unsafe: 110, Safe: 53 Unsafe: 136, Safe: 42 Unsafe: 106, Safe: 36 Unsafe: 95, Safe: 43 Unsafe: 98, Safe: 41 Unsafe: 88, Safe: 36 Unsafe: 129, Safe: 65 Unsafe: 100, Safe: 47 Unsafe: 112, Safe: 50 Unsafe: 91, Safe: 33 Unsafe: 118, Safe: 42 Unsafe: 103, Safe: 80 Unsafe: 104, Safe: 34 Unsafe: 101, Safe: 36 Unsafe: 154, Safe: 83 Unsafe: 134, Safe: 46 Unsafe: 113, Safe: 76 Unsafe: 117, Safe: 57 Unsafe: 90, Safe: 41 Unsafe: 156, Safe: 35 Why is my unsafe version always slower? Is it due to using the back buffer? Or am I doing something wrong? Thanks

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