Hello, I'm not an expert in Graphic User Interfaces so I'm posing this question to the experts. I have a plain vanilla user control that represents my main view. The view's size is fixed and divided evenly into 8 square regions. The view's backcolor is white. When the user selects an...more >>

The PixelFormat Enumeration contains Format16bppRgb555, Format16bppRgb565, Format16bppGrayScale and Format16bppArgb1555. Does the BMP file format admit to this distinction? What about filling in the BITMAPINFOHEADER structure. Is there a way to differentiate these formats there? ...more >>

I'm interested in coding a simple, easy to use, open source vector drawing program similar to MS Word's drawing tool bar or MS Paint (but vector-based) to run on PocketPCs (using the .NET compact framework). It would let the user draw & fill boxes, ellipses, polygons, lines, add text, etc, and...more >>

Hello, I experience a strange problem with PictureBox I draw onto. My application has a fill-docked TabControl on its form and there is PictureBox on one of the TabPages. If I resize the form (hence the PictureBox should resize too) WITHOUT switching to the TabPage containing the PictureBox bef...more >>

Hi, I am a newbie in the C# graphical arena and I have the following problem. I have a 2D disk in which I have a few points, each point having x, y coordinates and also a value associated with it which represents profit (or loss). What I want to do is to create a background with a gradient go...more >>

I'm about ready to give up. Been trying to convert a 8bpp to 4 bpp but haven't found a way. I can us Quantizer to generate a 16 color palette but that changes the pixel format to 8 bpp. I can convert to 4 bpp using GetDIBits but that converts to the standard VGA palette. So I can com...more >>

Hi! I have about hundred of small bitmaps I have to use in my web app as small icons on some image map. Every icons represented with these bmps should be drawn in 2 states: 1. normal (as is) 2. disabled (dimmed, i.e. with some "grayed" color) I'm not a image designer and lack of knowledge abou...more >>

How many invalid parameters are there in the following method call? myScaledHdc = myScaledGraphics.GetHdc(); Running in the debugger, Visual C# 2005 SP1 says there's at least one invalid parameter in the above call. And the invalid argument exception was unhandled, well no kidding about t...more >>

I'd like to be sure I completely understand: There is no way, using Dotnet and/or some free software, to save an indexed GIF file as anything but 8bpp. Right? What about other indexed files like BMP. Same problem? What files have that property. Knowing this before I work with them...more >>

I am drawing a rectangle on a picture that has already been drawn on the graphics area (a user control). It works something like this: //in the MouseDown event m_isDragging = true; m_oldX = e.X; //save original positions m_oldY = e.Y; //in the MouseMove event if (m_isDragging) ...more >>

Hello I am saving JPG file with the following SUB. Sub SaveJPG(ByVal Image As Image, ByVal FileName As String, _ ByVal QualityLevel_0_100 As Byte, _ ByVal ColorDepthLevel As Byte) Dim ImageCodecInfoJPG As ImageCodecInfo = GetEn...more >>

After a call to Graphics.DrawImage, an OutOfMemory error might occur. The probability of an error has some correlation with the size of the image but is not reliable. Even with an image of a few hundred megabytes, sometimes the error occurs and sometimes not. Some random postings on the web...more >>

Is it possible using Bitmap.Save to produce a GIF file that is 4bpp? Seems that I always get 8bpp. If I know it's not possible I'll quit trying. Thanx ...more >>

Hi, I am new to GDI+, our client is interested in have their web-based project management generate some roadmaps that look like the one below: http://farm2.static.flickr.com/1226/1185331048_5d0b41e7f8_o.png The duration of each project is from the database. As I cannot find any API tha...more >>

Hello Everyone, I have a need to generate images similar to what you would see in a periodic table of elements or on a Scrabble board. It seems that I can get the painted on the image, but laying the image out properly seems to be a challenge. Let's take the Scabble example, I think thi...more >>

I have a directory full of single page TIFFs. I would like to write a program that will combine all of them into 1 multipage TIFF. Here is my code. I am getting a "Parameter not valid" error message when performing the SaveAdd methods. Any help would be appreciated! oFiles =...more >>

As a beginner to GDI, I think I'm doing someting fairly straightforward, loading and saving an image, but it seems te lead to a loss of quality. What can be the reason for this loss, and how would I go about it to fix this? Thanx, Marcel I'm using the following code: Dim bmap As B...more >>

I've got a picture box inside a picture box. I would like to be able to move it and scale it. I've got the moving part down, and currently have a "make bigger" and "make smaller" button that scale the image by some fixed number when clicked. Is there an easy way to allow the user to grab ...more >>

I'm trying to write a program that spins through a List collection of Image objects and manipulates them. Unfortunately I keep encountering exceptions where I don't understand why they're happening. I've stripped down my app into a sample program that has the same flaws in it. The first exc...more >>

Hi, I am developing an application to verify firmware for an embedded device. One aspect involves verifying the display of the device. What I'm doing now is rendering an image of what the screen *should* look like alongside a video frame of what the device is actually displaying, then aski...more >>

Hi everyone, how can i draw a region (polygon or Ellipse) on a bitmap, copy the region i markes and paste it on a othe image or picture box? thanks, Ruby...more >>

Is there a way to download an animated GIF from the internet. Easy enough to get a still, but when I try it with an animated, I just get the image that is on the screen at the instant I press the save key. -- Mac...more >>

Hi , Bellow is my code. Dim img As Image = System.Drawing.Image.FromFile("E:\Images\form.gif") Dim gr As System.Drawing.Graphics = Graphics.FromImage(img) ------------------ Error line : Dim gr As System.Drawing.Graphics = Graphics.FromImage(img) ----------------- In that abov...more >>

Hi, 1) Load a theme which is .psd (Adobe Photoshop) file in asp.net. The .psd file contains layers a) which starts with Fill, b) Which starts with Clipart 2) Allow a user to select some image(.jpg). 3) Allow a user to select color. How do I Replace the color in the Fill Layer wi...more >>

I place a Bitmap on the clipboard with: Clipboard.SetData(DataFormats.Bitmap, BackgroundImage) Then retrive it with: d = CType(DataO.GetData(DataFormats.Bitmap, False), Bitmap) I place an 8ppbIndexed bitmap on the clipboard a get a 32bpprgb bitmap back. Am I stuck with that or...more >>

Currently I have the code that draws a dotted rectangle within a picture box as selected area. I want to replace the current image with that selected image segment. The problem is that the picturebox is located in a Panel of a TabControl and the x,y references the x,y relative to the main form r...more >>

Hi, I'm working on a project where we can/ (customer will) load a lot of pages at once ..... What we are loading is pages from a newspaper ,,, so there can be like 40 or more ..... Now the resolution is 3500x5500 and 300dpi ....... At some point not sure at which image, but when the ...more >>

Hi, I have a litte icon in png format with a transparent color. I show you what is the problem: in the following image I have - at left a picturebox where I set the image property and all is ok. - at right a picturebox where I assign to the image the same picture contained in a ImageList...more >>