In VB6 I drew a bitmap pixel by pixel (the pixel would a small square - not a pixel on the screen) using the line command, the coords, the colour and using the 'box fill' parameter [code]...
View 2 RepliesI have 2500 numbers in an array all representing a corrosponding tile, [code]...
View 1 RepliesIs there a way in Visual Basic 2008/Framework 2.0 to create and save a 8bits bitmap(Format8bppIndexed) to a .GIF file using custom colors(about 30) instead of the standard web colors?
If not, is there a way to convert a 24bits or 32bits bitmap to a 8bits bitmap using custom colors?
How to draw a bitmap in a picturebox based on coordinates of the bitmap inside the picturebox not the form
View 3 RepliesI need to draw a border of a certain width around a new bitmap.
I want to use Graphics.DrawLines, because i may want to draw the Horizontal or Vertical borders only.
For Example:
Code:
'Add this to a button on a blank form
Dim Canvas As New Bitmap(100, 100)
Dim G As Graphics = Graphics.FromImage(Canvas)
[Code]....
Ive fiddled around with this, but i cant get the math right. What must i do to get the border of the correct width around my bitmap?
Also do i need the first "G.Dispose()"?
I read that using Graphics.FromImage(bmp) will let you draw to a bitmap. I have this
vb.net
Imports System.Threading
Public Class Form1
Dim paintcolor_current As Color = Color.Black
[Code].....
Can I Draw text onto a bitmap? or can I convert a string to a bitmap?
View 4 RepliesOk well im making a game maker =) but there are some problems that need to be fixed =(. Ok well the first one is bitmap, It takes up to make space and it has a size limit. Is there something like bitmap that will let me draw images onto a picturebox or something like that with unlimeted space and it deos not to up much memory space? cause there are some game makers with huge maps and they used visual c++ but how i dont know
View 13 RepliesI am building an app that builds a bunch of cardinal splines by storing their PointF structures in arrays. As the program runs, new points are added to the arrays, and the graphics are drawn to a bitmap. I can let it run for ages and the splines just keep growing like they should with no problems. The amount of points in each spline can grow into the thousands. To speed up execution as time progresses, I don't completely redraw the splines after each pass, I simply draw the last segment of the spline to the bitmap, having let the bitmap 'record' the earlier part of the splines.
But if I pan across the scene or zoom in/out of it, then I DO have to completely redraw the splines, since the size and resolution of the display is limited to its dimensions. Panning works, no problem. But if I zoom in and out of the bitmap with the mouse wheel, after about 14 wheel clicks, I get an "Out of Memory" error. BUT...I have it set up so that whenever the mouse wheel turns, the graphics and the bitmap are disposed so that new ones can be built for the new zoom setting. So why would the program run out of memory when as far as I can tell, I am disposing of all my unused, unmanaged resources on a regular basis?
I was wondering how to draw characters/string on a bitmap.For example: I have created a new Bitmap with resolution of 200x200. Now using Graphics.DrawString(), I have to draw text. I can draw text. But my question is, I want to fill it the image with that string.Say, the text be "abc".So, the output would look like this for 200x200 bitmap (assumption):
[Code]...
Essentially I am searching an array for colors. If there is no input, on button click you get an error. If the color does not exist you get an error. If it exists then it tells you. The latter two events are not happening.
Public Class Form1
Dim count As Integer
Dim Crayola() As String
Private Sub Form1_Load(ByVal sender As System.Object, ByValue As System.EventArgs)
[CODE]...
I'm not sure whether this post should be in the System.Drawing topic, but here goes... I need to create an array of colors to be applied into a Dundas Chart. The chart code is not the issue, but I can't seem to create an array of colours. Here's what I need to be able to do.
[Code]...
I am trying to create an array of colors. approach 2 doesn't work and I do not know why
Code:
'approach 1: works
Dim list As Color() = New Color() {Color.FromArgb(255, 0, 0), Color.FromArgb(0, 255, 0), Color.FromArgb(0, 0, 255)}
Code:
'approach 2: fails.. why?
Dim list() As Color = New Color() {Color.FromArgb(255, 0, 0), Color.FromArgb(0, 255, 0), Color.FromArgb(0, 0, 255)}
If instead I wish to create an array of strings, both approach works, that's weird.
I have 15 checkboxes of control array and at run time fill any 4 or 5 or 6 check boxes with color using colordialog. How can i send the colors to the sql server table using for loop using code at runtime
View 1 RepliesI'm working on a program that has to get a set of images and then scan them to find pixels that match colors in an color array. Anyway I think I got everything working but how to load the images in as bitmaps. See the images are dynamic, they change there filenames so I can't call them with a static call like Dim bmp2 As New Bitmap("c:button.gif").
So I am using a loop to feed the images into an array for bitmap but thats not working, anyway that I can do this as, right now the program gets all the filenames for the images from a text file that is sent in to us. All I need to do is have the program check each image for pixels that match our color list. But I cant get the images into the bitmap array.
If I do the same thing in Paint it works OK. But if I open a .bmp file into Photoshop.Select All and Copy to put it on the clipboard. Then my code then reads the stream into a byte array and eventually makes a Bitmap from it.If I assign the bitmap to a background image it displays OK.But if I insert it into a RichTextBox using Khendys Gordon's method it does not display.However, I find if I clear the Clipboard before inserting it, it does display OK.I suspect the Bitmap is using the Clipboard for backing much like when and Image is created from a disk file.But it is confusing because I copy the stream into a byte array and make the Bitmap from the array. It would seem that once the values are copied into a new array the backing would not be in play any more.
View 21 RepliesI have an application which take image from a folder through system, Io.filestream and convert it into bytes and store into database as byte data format and same I retrive from database as byte format and convert it into image into datagirdview. now I want to convert it into again bytes from datagridview. How to possible the value of image in datagridview into byte format.
View 1 RepliesMy goal is to find the fastest way to convert a bitmap in a one-dimensional string array, where black pixels have to be converted in "X" characters and every other pixel in blank characters.My present attempt is to use a code like:
[code]...
But the Cpu usage is excessive, and the elaboration time too (I have to convert one Image by second).Can someone suggest a much more fast method, maybe using some Api??
I have a small 10px by 10px image, and I want to use VB.NET to find out if that image is (an exact) part of a larger image.I thought a method of doing this would be to lock the bits of the larger image into memory and then loop through each pixel in the image and for each pixel, I could take the 10px by 10px section which is down and to the right of that pixel.. and then compare it to my smaller image.
This is the code I have so far:
'Lockbits of larger image to memory
Dim bmp As New Bitmap(Image.FromFile(System.AppDomain.CurrentDomain.BaseDirectory() & "picture.bmp"))
Dim pxF As PixelFormat = PixelFormat.Format24bppRgb
[code]....
when I'm looping through the 10 by 10 section and I find the R G B bytes for each pixel, how do I store this in my rawImage array so I can convert it to a back bitmap and compare it with my original small 10by10 image?
I'm using Bitmap to show picture box like slideshow using Timer. For each timer interval, I've to go for new instance of Bitmap, there System memory increases to 1MB, How to resolve this, 'BG is picture box
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tic Dim img As Bitmap
img = New Bitmap(System.Drawing.Bitmap.FromFile(FileIO.FileSystem.GetFiles
[CODE]...
I'm trying to use a ToolTip directly to a Bitmap Object (System.Drawing.Bitmap), aparently I can't do this because Bitmap isnt a Windows Control.
View 1 Replieshow can i create a monochrome bitmap from a semi transparent bitmap in vb.net? the bmp is for a transparency mask image for an icon i'm trying to create with the CreateIconIndirect API function.
i'm using vb2008 .Net3.5, but i would prefer an answer that would also work in vb2005
I have a array of pixels. And I would like to Quantize them.
For Example
FF00FF,00FFFF stuff like that, but most are custom colors and are not a standard 256 color palette. So I need code to convert a color to a 256 color. I dont have any idea on how to do this, but thats why I came here. I do not want to use System.Graphics.Image.Palette or anything like that as this project uses arrays for images. I would like to if at all possible be able to convert a R, G, B color to 8bit, 16bit, 256bit and possibly use the HSL or NeuQuant method or something close to that, or maybe even some other methods of doing it. I do need to be able to do this for a single pixel, but I will also need a method for a array of them.
I've got an array containing lots of "Color" and I want to change the order of this colors (random) but with a password: so another user can get the "original" (and correct) sequence of the array only with the right password. How can I do this in Visual Basic .NET or C# ? Do have I to use a particular encryption engine?
View 2 RepliesHere is a short program to demonstrate my question. I just want to extraxct a rectangle bitmap from a big bitmap.Code as follows:
Private
Sub Button3_Click(ByVal sender
As System.Object,[code]....
Execution stops when hitting the Dim cloneBitmap statement, which should have created a bitmap out of the rectangle cut out.The message is:
"MissingMemeberException was unhandled.
No default member was found for type 'bitmap"
I just don't get it. Seems that the method Clone(Rectangle, PixelFormat was not found.
I have a grass image located here in my directory. I want to just create a Bitmap, but I am getting an error. (Parameter is not valid.) Immediate Window: A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll
[URL]
private void Form1_Load(object sender, EventArgs e)
{
Bitmap bmp = new Bitmap("grass.jpg");
}
bertino
I need to get the DataGridView to perform the way it should perform. I'm new to the .NET environment, but I learn fairly quickly. However, I find it difficult to decipher themassive black box of the DataGridView control enough to make it do anything other than what it already does--Draw very slowly.
View 3 RepliesThe code below reads an Icon from an .ico file, converts the Icon read to a Bitmap and saves the bitmap using:
Bitmap.Save(PathA)
Then does:
PanelShowWrittenIconA.BackgroundImage = New Bitmap(PathA)
[code].....
I have a form that uses a button to draw a line and a second button to draw a rectangle. I have a third button to clear the form but can't find a code example to code the Clear button.
View 4 RepliesI have to draw a bar graph in my vb.net program. I used AxMSChart to create a graph. Everything has gone fine but when i published this and run on Vista PC, all form was good except my form includes MSChart. It says class not registered.So i have to draw a graph except MSChart tool.
View 10 Replies