Pixel Multiply Blending With Alpha?
Aug 25, 2011
I am going to blend two images together using multiply blending, and will iterate through all pixels. I have search in wikipedia that the calculation of multiply blending is:
resultRGB= src * dst / 255
but it didn't mention about alpha, how does alpha affect the result?
For y = 0 To fsrc.Height - 1
For x = 0 To fsrc.Width - 1
Dim d As Color = fdst.GetPixel(x, y)
Dim da = d.A / 255, dr = d.R / 255, dg = d.G / 255, db = d.B / 255
[code]....
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Apr 12, 2010
I am working on a project that I wish to convert the picturebox image to acting as glass effect. What I mean that I would be able to see any controls behind the picturebox control. Something would be like this:[URL]..
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Nov 17, 2011
I'm trying to create a program using Visual Basic .NET 2010 that alters the use of my media keys - Volume up, Volume down, Play, etc. All of the example I have found don't seem to compile quite correctly in 2010. Don't get me wrong they run fine and look exactly as specified but the problem is that the form cannot be edited because it claims the designer code is ill-formatted or something along the lines of that.
Can anybody possibly spare a project or form that has perpixel alpha transperancy?The only thing i want to do is show an overlayed png that has an alpha channel, on the desktop. The form border style will most certainly be "NoBorder"
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Sep 28, 2010
I am creating a project with a maximized per-pixel alpha form. However, the normal input events (MouseDown, MouseWheel, KeyPress, etc) are never raised. I've been able to create some bare-bones functionality by overriding the WndProc method, but some things elude me. For example, I want to detect mouse wheel scrolling. When I check for the mouse wheel message, it works fine. Then I try to use the GetLParam function to get a MSLLMOUSESTRUCT with the scroll data. However, when I try to use it, I always get an error:"Attempted to read or write protected memory. This is often an indication that other memory is corrupt." What can I do?-Must Program! Error: Not enough time to program
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Jan 13, 2010
I have PNG and need to know if it has an alpha (or if the alpha is completely white)? How can I accomplish this in vb.net code.
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Aug 20, 2009
how to tell VB to take two images and blend them together. Similar to how Windows 7 does it's wallpaper fade when it switches wallpapers. For now I found the program Image Magick can do that with the composite command. I'm trying to do something like this:
SH = CreateObject("WScript.Shell")
for x=10 to 100 step 10
SH.Run("%comspec% /c composite -blend " & x & " -gravity South img1.jpg img2.jpg -matte blend.jpg")
SetWallpaper("blend.jpg")
next
But so far no dice.
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Jan 30, 2009
I would like to load a GIF file, and start with the first pixel and check to see if that pixel color is closer to Black, Red, Green or Yellow, then take what ever color it closest matched to and output that color as a number, 0, 1, 2 or 3. So just for a small example a 5x4 GIF would be converted to something like this: 0112223322220111332?
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Jul 4, 2010
How do i determine the pixel width and pixel height of the largest image i can paint onto the graphics object of a printer while inside a printpage event?
Imports
System.Drawing
Class
[Code]......
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Sep 13, 2007
Is there a quick way to check the color of a pixel on the screen?
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Jul 20, 2009
during the development of my project, i've fall in the need to change the position of some forms, pixel by pixel using a timer.Now, i've checked that the movement is very fluid when form is not very heavy, when it contains few elements, but when it has a lot of elements inside, the movement becames nervous and not fluid, the movement becomes jerky.
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Jul 29, 2010
How can I find out the pixel colour of a certain point on a web browser. For instance,WebBrowser1.getPixelColor(0,0) would get the rgb colour value of pixel 0, 0.It doesn't have to be rgb it might be hsl or whatever.The web browser is showing a local web page that is hosted on a network. If there is an error then the screen goes all grey. What I want to do is, if this does happen, display an alert message like - "An error has occurred
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Apr 16, 2011
I have an empty picture box with the background colour set to the transparancy colour. How can i get the colour of the pixels within the transparant picture box so that i can create a bitmap of the transparant section of the form?
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Sep 10, 2010
I am a student in South Africa. We have had a long strike in our education department. Thus resulting in our lecturer not teaching code adequately. I have managed to stumble using the text given but I cannot figure out how to multiply or add two values?
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Feb 11, 2010
1: Start with bitmap in picturebox colored white2: Draw a filled rectangle (50,50,100, 100) Color black - ARGB (255,0,0,0)3: Draw a filled rectangle covering black rectangle (25,25,150, 150) Color blue, with Alpha set to 100 - ARGB (100,0,0,255) -because of 100 Alpha setting the black rectangle is visible through the blue rectangleProblem : Using bitmap.GetPixel on the blue rectangle (over white background) the result is ARGB(255,155,155,255) -an Alpha value of 255. The new color loooks the same but is not transparent.Question: How to find Alpha(transparency) value of pixel
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Jan 11, 2011
I have built a small VB.NET Calculator but whenever I add, subtract or multiply by 0 the answer is always 0. Here is my code:
Spoiler
Option Explicit On
Public Class Calculator2
[Code]....
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Aug 11, 2010
I need to figure out how to multiply hexadecimal numbers in vb .net 2008.Ex / 7E1 x 2 == FC2I was thinking maybe converting the hex to bytes, multiplying that, then back.
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Jun 6, 2012
i have a problem for put in multiply input
Try
Dim StrSQL As String = "INSERT INTO boranga" & _
"(IdBorangA,Answers)" & _
"VALUES (@B_IdA,@B_Answer);"
[Code].....
by adding more parameter "parameterB_IdA.Value = Label1.Text" for IdBorangA
and "parameterB_Answer.Value = TextBox2.Text" for Answer but the result i get that the table only filling with the data from Label2.text and Textbox2.text.
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Aug 9, 2008
My problem is printing multiply pages. The below test code prints from a ListView display, being populated from a database, which works fine for the first time, however, all subsequent times page two data is printed over page one data. Is there some way of resetting for successive printing.
Private Sub pd_PrintPage1(ByVal sender As Object, _ ByVal ev As Printing.PrintPageEventArgs)
Dim printFont As Font = New Font("Courier New", 11, FontStyle.Bold) Dim linesPerPage As Integer = 0 Dim yPos As Single = 0 Dim leftMargin As Single = ev.MarginBounds.Left Dim topMargin As Single = ev.MarginBounds.Top Dim
[code]....
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Feb 21, 2009
how to send multiply files over FTP with Visual Basic 2008 (.NET).
Here is the code I'm using:
Code:
Try
Dim clsRequest As System.Net.FtpWebRequest = _
DirectCast(System.Net.WebRequest.Create("ftp://FTP server here/" & "FTP output filename here" & ".txt"), System.Net.FtpWebRequest)
[code].....
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Oct 14, 2010
I'm having trouble using Visual Basic. It's my first time with the program that my college course is requiring I use. I'm having problems programing the script for an application. It's suppose to take the rate of a bunch of employees that are programmed into the application using an array, and multiply it by a decimal number that the user inputs into the application.
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Apr 18, 2009
Suppose I have a string, if I want to basically write it multiple times, depending on some integer value. How I can do that?For example:
dim STR1 as string = "</li></ul>"
dim INT1 as integer = 4
dim STR2 as string = " "
I would like to see the output as
STR2 = "</li></ul></li></ul></li></ul></li></ul>";
Can I achieve it in VB.NET?
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Feb 1, 2011
I still want to be able to show my code in front of the class/receive feedback. I originally had a program that would calculate the number of calories in your alcoholic beverage.Because I was new at it, I only had one of my beverages listed. I now want to create a combobox/ dropdown menu so that the user can select a standard alcoholic beverage (I have 6 to choose from). All the beverages have different average calorie counts. Once the user selects their beverage from the menu, they can type in the number of servings they consumed (standard size). They would then push a calculate button and would receive their total calorie count. I have everything up and working but everytime I enter a random number of servings and push calculate, it only multiplies by "100" which is the average calorie count for a serving of Light Beer-- the first listed.[code]
I just added the If/Then/Elseif stuff a couple of minutes ago, hoping it would work, but it doesn't. I know this is something simple but like I said, I'm brand new but I have searched everywhere trying to figure this out. I've watch 9 tutorials so far but they all don't really pinpoint what I want my program to do.
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May 26, 2011
Dim phoneNumber As String = "077 47578 587(num)"How do i strip the above string off every character which isnt a number. So only the numbers are left and then check to make sure it is 11 characters long?
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Jun 30, 2009
I am trying to create a function that would take 2 images. 1 of the images is a grayscale image and the other is a normal image. What i want to do is apply any of the R or G or B of the grayscale image (in grayscale image r=g=b so it makes no difference) to the Alpha of the second image. i DID succeed on it. However the code is EXTREMELY slow. It takes 1 second to perform it. And i have to perform the function atleast 30 times a second (it will be outputting to a Decklink card). Here is the code:
public function createOverlay(ByVal Main as Bitmap, ByVal Key as Bitmap) as Bitmap
For index as integer =0 To (Key.Width*Key.Height)-1
Dim crntX= index Mod(Key.Width)
[code].....
This function will have to run infinitley until the user presses stop and keep updating the output buffer. How can i make it faster? ( i need at least 30 executions per second)
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May 2, 2010
I would like to drop a few buttons onto a picture box or a container control that has a background image set.
I would like to have the button's image be an alpha PNG file.
I can manage the mouse over and click such that the button behaves exactly as one does on a web page.
I struggled with it in vb.net 2005 with no luck. If you take a PictureBox and lay it on top of another PictureBox, and set its images to alpha PNG's, and its background to transparent, then the form shows up in the alpha blend, not the other picture box.
And if i accept that i am limited to the background of the form, then it's performance then becomes unacceptable.Since i can Graphics.DrawImage onto a PictureBox's image fast, i assume that the folks at Microsoft must have decided to use the form's background (and slow painting, and not the other controls and the z-order), by design. I cannot for the life of me figure out why they have made that choice.
So my question is this:Does vb.net 2010 support the layering of controls that supports alpha transparency, and can we now create a custom-control with a transparent background?
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Apr 18, 2012
if i had say 10 labels with 10 textboxes how would i save all those labels accosiated with that text box as one text file
say example
label = name ---- textbox1
label2 =surname ---- textbox2
label3 address ---- textbox3
etc
so in the text file it saves it to look like this
name = hayden
surname = doh
address = johnston hwy
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Jan 31, 2011
How can we multiply the values of the text boxes(reportitems) in rdlc report?
Ex. The expression of TextBoxResult report item is:
=Reportitems!TextBoxPrice.Value * Reportitems!TextBoxQuantity.Value
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Oct 4, 2011
I'm trying to figure out how to multiply two text boxes but also after they are multiplied, they need to be added at the same time. For example, if in one text box I put 120000 and in another I put .06 - the answer multiplied together is 7200, but the final answer should show 127200.
[Code]...
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Apr 12, 2010
i have 6 groups of 5 textboxes each one with numbers 12345 i want to know how i can multiply them and how to see the 15625 numbers
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Sep 15, 2009
How would I get a button to divide and multiply?
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