Hello, how can I permanently clear the content of a PictureBox which has a background colour set to white? I have tried to do it the same way as I do the painting (create a Bitmap, clear it with white colour and draw it onto a Graphics on the PictureBox), but it does not work as I expect it wou...more >>

Hello there, I have a 2-dimensional byte array of RGB pixel data. The first dimension is the image width * 3, and the second is the image height. The format is as follows: R1G1B1R2G2B2..... etc. for each line in the image. I've been searching for an easy fast way to get the 2-dimensi...more >>

I'd like to allow users to paint over an image using a circle of a given size so that I can 'cut' out the painted area. I've tried using graphicspath.addellipse on mouse move which gives an impression of what I require but this leaves the interior of the path all jumbled with circles. I'...more >>

Hey All, I have a metafile that I want to convert to an image format. The main purpose behind this is to rotate the image 180 degrees. However, the quality is quite pixilated. What is the best way to do this? basically I want to convert the metafile to an image format, rotate 180 then print...more >>

Why couldn't the palette of the saved bitmap be revised and re-inserted back into that bitmap. Rather then the time consuming coping of all that bitmap's data to a new bitmap? I'm sure knowing that is important to knowing how to work with indexed files. Thank ...more >>

Dim Ncp As ColorPalette = Bm.Palette From a test I ran I think that the above statement does not cause Ncp to reference Bm.Palette but instead produces a new palette and Ncp points to it. Is that true? If so, is the new palette a clone of Bm.Palette? Thanks ...more >>

See code below mDifImage is 8-bit indexed How can I calculate what value to set sz to? I look at buffer expecting it to start with BITMAPFILEHEADER 14 bytes or BITMAPINFOHEADER 40 bytes but I see 13 bytes of mostly 2=digit values followed by many 3-digit values. What s...more >>

I think I found a bug in Graphics.DrawString() method. Font underlines and strikeouts are drawn in wrong places after changing Graphics.PageUnit. To reproduce this bug place provided code in the Paint event of a form: { Font font = new Font("Arial", 10, FontStyle.Underline); Graphics g = ...more >>

I need to animate graphics over a large.jpg set as the forms background. Reloading the image each time the animation moves is not an option as it takes too long. I thought drawing on a transparent panel would be the answer indeed it works with a non transparent panel but not with a transpa...more >>

Hi there, I have a bitmap which I get graphics from and draw on. Sometimes the image will be too big for the bitmap bounds however, so I need to increase the dimensions. The constructor in Bitmap that takes an existing one and adjusts the size actually only scales it so this is of no use to m...more >>

A am looking for a simple example of text editor made all by GDI+.. I can image one must be an expert to create a full editor: I just need the very basic. Typing and erasing letters, basic spacing and moving the cursor back and forth over a graphic object. Do you have an example or a pointer...more >>

I'm looking for a way to 'Lasoo' a section of an image. Similar to the sparkling wand mask tools in Photoshop and the likes... Hopefully to return a region object. Any pointers ? Any ideas ? ...more >>

I need to change the size of an Format8bppIndexed image. I suppose I could change the format and scale it and put it back. But I'm wondering if there is a more straight forward way. How would you change the size of a Format8bppIndexed bitmap? Thanks ...more >>

Hi, I'm trying to clip an image to an irregular shape. I've come across some advice from Bob Powell (http://groups.google.co.uk/group/microsoft.public.dotnet.framework.drawing/browse_thread/thread/86485270f7a57ede/dd79ef1988191326?lnk=st&q=cropping+or+extracting+ellipse+from+image&rnum=1&hl=...more >>

explanation of project: in my project there are many devices and when these devices are going to up ,they send their icons to explorer to show .if explorer does'nt able to show icons of these devices through proper way then it shows default icons of these devices. multithreaded...more >>

Is it possible to left-justify, center, or right-justify text on a panel when drawing it using DrawString? I looked at the StringAlignment class, but all it has is far, near, and center. Thanks, Robin S. ...more >>

I am creating Text Slides for my user, i.e. taking text input and creating jpegs out of it. I have text and the selected font. Is there a method for calculating the maximum font size I should use in order to fit the output to a specific area, like 1024x768? Or do I have to use MeasureStr...more >>

New to use of Drawing Class.... I'm trying to create an asp.net page/control that will display a green to yellow to red gradient bar. Not seeing where I could create a 3 color gradient, I create a green to yellow rectangle and then a yellow to red rectangle and join them in one bitmap. ...more >>

In Powel's GIF transparent color article in the FAQ add one of the following at the top of Private Sub panel1_Paint Seems to me that putting the palette on the clipboard and then retrieving it should not change anything. Can you see what is wrong here? Thanks 1) Private S...more >>

What do you get when you do: InputImage = Image.FromStream(... and the file is a .gif Is InputImage.Palette the palette of the gif file. I ask because I always find it to be Nothing But the InputImage displays OK as a Bitmap Thanks If that is not the .gif palette is that...more >>

Hello there, could someone please tell me how should I pass a Graphics object (which has already been drawn onto) to another method to do some drawing and then get it back from the method with the changes made there? An example to clarify the situation: // this is done after calculating a ...more >>