DrawImage And Defining Color To Copy Instead Of Mask?
Feb 7, 2012
I am using VB 2008 & drawimage function to copy image A to Image B. My problem is image A has many different colored patches on it and I only want to copy the ones that have a certain RGB value. I was going to set the masking color to the RGB value but remembered that defines the color to ignore - Im interested in the opposite.
I know I could loop through all the pixels and check its color, but its way slow and Im hoping theres something better?
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Oct 9, 2009
using DrawImage I can copy the whole source picture into destination one using its left&top corner and width&height sizes...butI would like to copy A REGION of source picture into destination one using my "starting corner" and my sizes.
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Nov 14, 2011
I have these three images that I have drawn to my form.
GraphicsBuffer.DrawImage(ButtonEasy, New Rectangle(25, 330, 100, 50), 0, 0, 100, 50, GraphicsUnit.Pixel, ImageAttributes)
GraphicsBuffer.DrawImage(ButtonMedium, New Rectangle(150, 330, 100, 50), 0, 0, 100, 50, GraphicsUnit.Pixel, ImageAttributes)
GraphicsBuffer.DrawImage(ButtonHard, New Rectangle(275, 330, 100, 50), 0, 0, 100, 50, GraphicsUnit.Pixel, ImageAttributes)
But I want to make a Boolean expression for when they are clicked so I can trigger the events to load the game mode selected.
Do I do this through resource code or is there a simply way to do this. My idea seems like it would be bad and not syntaxically correct.
Edit: I've gotten to this:
Private Sub ButtonEasy_MouseClick(ByVal sender As Object, ByVal e As MouseEventArgs) _
Handles ButtonEasy.MouseClick
[Code].....
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Jul 8, 2009
At the top of my code I have:
imports system.drawing.graphics
but when I try to use it, no DrawImage or DrawString methods are available. I can get DrawImageAbort rather ironically.[code]...
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May 15, 2011
I've a program that draw an image in a picturebox with DrawImage. This image, a ball (.png transparent), every second is overwritten by another ball of different color. After 3-5 second the edge of the ball becomes bad, because of overwriting.
I tried to clean the background with a FillRectangle before any overwrite, but i need to preserve the windows form background. How can i do that?
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Jun 1, 2010
Well currently im programming a game in Visual Basic and I have it to the point where it draws a map on the form, it loads maps to different areas when you walk on the map, and I am doing so by using Graphics. DrawImage which redraws the map on the screen with the character in the new position. It was working quickly and smoothly until now.
I added some more sprites and now it starts to lag badly then it will throw a Out of Memory exception and it will display a big red x across the form. I watched the memory now as i move the character one spot on the forum and the memory increases 100mb's each time. It wasn't doing this before which is weird. I managed to fix the out of memory error using GC.GarbageCollect but I read that this is bad, also the character still lags across the forum. I really didn't want to release the source code until I was finished but seeing as I need help quickly because this is for a project I am working on for Thursday (End of semester Programming 2 Junior year of high school) I don't have many options.
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Apr 6, 2010
In my user control's paint handler I iterate over a collection of predefined Bitmap objects and draw them to the client area thusly:
C# version:
private void Control_Paint(object sender, PaintEventArgs e) {
Graphics g = e.Graphics;
foreach (BitmapObj bmpObj in _bitmapObjCollection) {
g.DrawImageUnscaled(bmpObj.Bitmap, bmpObj.Location);
[Code] .....
The code works fine but starts to bog down when a dozen or so objects are added to the collection. My question is: Is there a way to speed this up? Would it be possible to use the Win32 bitblt function to replace DrawImageUnscaled? And if so how?
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Dec 21, 2010
Graphics.DrawImage loses resolution
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Jul 18, 2010
Basically, what I am trying to do is scale part of an image. In VB6 the Scaling version of the BITBLT api worked fine, however in .NET's Drawimage version of it works okay, until a different destination size is specified.url...The red is from the next tile on the source image. and the bottom is missing one row of pixels.I have also screened this, and counted that the left side isn't properly doubled and the very first column of pixels is in 1x1 squares instead of 2x2 like the rest of the image.I don't get why it's obtaining outside the range I set, so here is my code incase it helps, note that you'll need to define a blocks array:[code]
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Feb 5, 2009
This is my first post to these forums so forgive me for any etiquette I may be disregarding.I am creating a custom control that has a TabControl on it. The user will then double click or right click the TabControl to display a ContextMenuStrip asking if they would like to add a new image (or tab) to the project. After they select the image file, I create a new tab, add that to the TabControl, and then I want to create a PictureBox that I draw on in a particular way depending on space available and several other factors.
Where I am having the issue is in drawing the image to the PictureBox, it is only displaying the BackColor and none of the DrawImage work. It is important to note that because of what I am doing it will not suffice to set the PicBox.Image = ImageFile or PicBox.BackgroundImage = ImageFile. I need to select tiles from the image file and then draw them into the PictureBox in a particular way, which changes if the control resizes. Also, I am using a PictureBox because the final image within it can potentially be larger than the containing tab page, and therefore I want the TabPage to generate an AutoScroll bar. If there is another way to do this, please let me know.
Below is a very simple example of what I have currently. What I suspect to be happening is that the PictureBox's Paint event is firing after I do my DrawImage work and basically overriding what I did, but I hope I am wrong.OpenAddTilesetForm() simply displays a form for the user to select which image to use, and the properties pertaining to it.
[Code]...
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Nov 15, 2010
In the following code is the way to make a picture transparent (picture i1 is emty and opacity can get values from 0.00 to 1.00[code]...
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Nov 30, 2011
[Code]...
I don't know how to distort bmpR with destinationPoints0. Which graphic method do I use to transform it? Muchas gracias, Onion Ring (fried) Onion is a recent refuge from Mac OS X and hates Mac App Store. System: Windows 7 x64
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Jun 5, 2010
I'm trying to improve the speed of my call to:Graphics.DrawImage (Image, Rectangle, Int32, Int32, Int32, Int32, GraphicsUnit, ImageAttributes)I want to display two images, where the old one fades smoothly into the new one, driven by a Timer tick of 10 or 20 ticks a second. The following code runs fine on JPEG files of around half a megabyte or less, but takes much too long (up to half a second) fora 2MB JPEG. Using the Stopwatch control, I isolated the problem to the two .DrawImage calls. Do I need to do this in DirectX or is there a way to improve the efficiency of the routine? I thought of trying to resize the two images beforehand to fit the rectangle, but that's not a simple call (I don't think), and it might just mean moving the delay elsewhere.
(Dim fltOpacity As Single = 1.0F 'opacity value)
(Dim BGrafx As BufferedGraphics)
* * * * * * * * * *
[code].....
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Feb 20, 2009
How do I flip the image upside down (below the first image) Like as if a house were at the waters edge and you can see the house, and the reflection in the water?
code for drawing the image (which is a battery)
VB
'Finding center'
Dim batX As Integer = 160 - (imgDct(cbo_Battery.Text).Width / 2)
Dim batY As Integer = 200 - (imgDct(cbo_Battery.Text).Height / 2)
'Draw Battery
[Code]...
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Nov 11, 2011
' Show game directions.[code]...
I think this is actually really easy to do that it isn't documented on here or msdn.
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Dec 13, 2010
This is in a class, the class inherits Panel. VB.net
[Code]...
The goal is to have this image stretched to 300x50 Whenever I do it, it works, but it fades the image from left to right, so that at Left = 0, the image is solid, but at Left = 300, the image is transparent.
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Mar 15, 2011
I need to draw a bitmap background with one or more moving bitmaps in the foreground; something like a chessboard where pieces move across it. I use a timer-tick event to redraw the background and then draw the relocated foreground image like the code below. But I get flicker, even though I set the form to use double-buffering. The culprit seems to be redrawing the background to refresh where the foreground images used to be; no flicker if I replace the background DrawImage with a simple Graphics.Clear. I think what I want to do is draw the background, and the foreground bitmap(s), in memory and then render it all. I used to do this with double-buffering, BitBlt, and .Refresh in VB6 but I haven't found the equivalent in VB2010. This must be a pretty common graphics requirement; what's the trick to it?
Dim Gfx As Graphics
Me.SetStyle(ControlStyles.AllPaintingInWmPaint Or ControlStyles.UserPaint Or ControlStyles.OptimizedDoubleBuffer, True)
Dim rectBrd As Rectangle 'use as clipping region for drawing
[Code].....
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Apr 17, 2010
I have tried to realign the image by down and right one pixel, but still only part of the first row and column are visible when zoomed.I can't find exactly what I'm looking for online.
My computer is an HP-Pavillion dv9600 Notebook PC.
OS: Windows Vista SP2 32-bit
The following code reproduces the problem:
Public Class PictureBug
Dim pxlColor As Color
Dim img As Bitmap = New System.Drawing.Bitmap(My.Resources.TestBug[code]......
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Oct 2, 2009
Am I just limited to the VB pen colors, e.g color.orange, color.black etc or can I define my own rgb colors? If so, how do I do that?
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Jul 17, 2009
I have .cls files that have attributes for XML files, and i would like to refer to them in the main body of my code without having to define each one as a class in the code as this would be writing them twice. How can i refer to a .cls file in a vb.net form? If you're not living on the edge, you're taking up too much room
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Apr 1, 2012
For a drop down combo box, if you place 0 as a custom mask, you can enter only numbers. If you place A as the custom mask, you can enter letters and numbers. How can I make it so that you can enter only letters?
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Dec 1, 2008
I'm having trouble getting a masked textbox to properly store a date. I'm using the short date format 00/00/0000 but when I navigate to a record that only has a single digit date it displays incorrectly.eg. 12/01/2008 displays as 12/12/008_Surely there's a fix for this but I'm not finding it.
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Jun 4, 2010
I have been using the following code to find files within a directory with a specific mask, without any problems except windows 7 platforms.
The Folder searched contains five(5) word documents with a .dotx extension
The following mask is being used:
"*.doc", "*.docx", "*.dot", "*.dotx", "*.pdf"
The search returns me ten(10) files as the *.doc mask returns the *.docx files too.
How can I get this to work on old windows platforms as well as Windows 7 with the same mask?
Dim
lFiles As
New List(Of
[Code]......
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Jan 8, 2009
I'm in MS Access 2003. I inherited a form with a text box. The text box has the following input mask. !(900") "000-0000;0; Here are my issues.
1. If the form is opened and I click in the text box at a point that is not leftmost, the cursor may not be placed at the leftmost position. Sometimes, it gets stuck at some point in the displayed mask. If I click in an empty text box, I always want the cursor to be leftmost. How can I create that behavior ?
2. If I get the cursor in the leftmost position of the text box and try to paste in phone numbers in certain formats, some of the input gets chopped off. ex: 555 555 5555, becomes (555) 555-{cursor} 555-555-5555 becomes (555) {cursor} IMHO, these formats are common enough that I would want a mask to accept it. Can I make the mask more general ?
3. What is the meaning of leading !, the double quotes, and the semi-colons?
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Jun 20, 2009
I am trying to Mask Employee ID, so the user doesn't have to type the entire employee ID number CCETA01. I want them to type only two digit numbers. e.g. 01 to 99...
Here what I did but its not working:I draged from toolbox a Maskedtextbox on the Form and in the textbox progerties I put cce a. The entire number show up on my textbox pretty good but it does not allow me to change the two digit numeric number?
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Aug 10, 2009
There are a number of textboxes I would like to validate. I first set up the key press events to only allow key entry's of characters which I feel are valid for this location (i.e. numbers and "." for dollar amounts). But in addition to this I would also like to ensure that the user entered something valid using an input mask. This may be a simple question but I couldn't seem to find the answer to it. If I have a input mask of ###.## and the user enters something like 4321.23, would this throw an error and if so, how should I set up my mask large enough so the user is able to enter large amounts.
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Jul 13, 2011
Here is the
Option Strict On
Dim mask As ULong = &HFFFFFFFFUL
Dim result1 As ULong = 20L And mask '//disallows implicit conversions
Dim result2 As ULong = 20L And &HFFFFFFFFUL
If you put that into the IDE with Option Strict On, it will not let you compile because of 'result1'. I'm not sure I understand why. In the 'result2' assignment, I am explicitly saying to use an unsigned long, however it's not giving me any grief.
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Nov 10, 2009
I would like to define an interface in the same manner as IDispose. By this I mean that when the interface is implemented it would add functional code.
For example when IDispose is implemented it adds a fully defined Dispose method rather than just an empty sub routine.
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Jan 27, 2010
What would the folowing VB.NET enum definition look like in C#? [code]
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Sep 16, 2009
How do I define the controls from another class? Here is my code (highlighted) -
Imports System.Windows.Forms
Namespace Bryanlgh.Echo.Views
Namespace Bryanlgh.Core.Tasks
[Code]....
I also tried using Imports Bryanlgh.Echo.Views instead of Namespace and it also came up with 3 error messages -
1. Namespace or type specified in the Imports ' Bryanlgh.Echo.Views' doesn�t contain a public member or cannot be found.
2. Name 'cboPcpMd is not declared.
3. Name 'cboPhysicianPerforming' is not declared
How should I define these controls?
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