Exception: A generic error occurred in GDI+. at System.Drawing.Image.Save(String filename, ImageCodecInfo encoder, EncoderParameters encoderParams) at System.Drawing.Image.Save(String filename...

So, after discovering that the Bitmap class expects the original stream to stay open for the life of the image or bitmap, I decided to find out if the Bitmap class actually closes the stream when i...

I am working in a spinner control. I want the control to support transparent backcolor. When the arc is drawn, there is a blank space in the middle, I want that space to be truly transparent, so th...

I'm trying to include the following definitions for GDI+ into my Win32 C++ project that is compiled under Visual Studio 2017: #include <objidl.h> #include <gdiplus.h> #pragma comment (...

I've been looking for an optimized (i.e., quick) algorithm that converts a 24-bit RGB bitmap to a 16-bit (RGB565) bitmap using dithering. I'm looking for something in C/C++ where I can actually con...

I am working on to upload and save a thumbnail copy of that image in a thumbnail folder. I am using following link: http://weblogs.asp.net/markmcdonnell/archive/2008/03/09/resize-image-before-upl...

I'm trying to get the size of the text string using GetTextExtentPoint32. I read the documentation many times and do some research and as far as I know, the below code should give me the corr...

i've got some binary data which i want to save as an image. When i try to save the image, it throws an exception if the memory stream used to create the image, was closed before the save. The reaso...

I'm trying to create a Label class where I can just reuse it later. What I've done is create a static control, then use the GDI+ library to DrawString on it. It's almost done, I only have one issue...

Okay, I am looking for a function or something that will read the color of a certain pixel on my monitor, and when that color is detected, another function will be enabled. I figure using RGB. All ...

I try to copy the contents of a graphics object to a bitmap. I'm using this code public static class GraphicsBitmapConverter { [DllImport("gdi32.dll", SetLastError = true)] [return: MarshalAs(Un...

I am currently dynamically creating a bitmap and using the graphics object from the bitmap to draw a string on it like so: System.Drawing.Graphics graph = System.Drawing.Graphics.FromImage(bmp); g...

I had assumed that Gdiplus::Bitmap::FromFile returns NULL if the file is not a valid image, but it returns a non-NULL even if I pass it a doc file, for example. There doesn't seem to be an IsValid ...

After several days of tracking down bizarre GDI+ errors, I've stumbled across this little gem on MSDN: Classes within the System.Drawing namespace are not supported for use within a Windows or A...

I want to reduce the number of unique colors of a bitmap in c#. The reason I want to do this is that an image which is initially created with three color but due to many factors (including compres...

I haven't written anything with GDI for a while now (and never with GDI+), and I'm just working on a fun project, but for the life of me, I can't figure out how to double buffer GDI+ void DrawStuf...

As I'm bringing in images into my program, I want to determine if: they have an alpha-channel if that alpha-channel is used #1 is simple enough with using Image.IsAlphaPixelFormat. For #2 thoug...

I run this code: graphics.DrawString("( پنج)", new Font(IranNastaliq, 77), ...); which results in: As you can see, circled parts are overlaid and turned transparent. Why those parts get...

I'm using this method to generate bitmaps from strings: private Bitmap ConvertTextToImage(string text, FontFamily fontFamily, float fontSize, FontStyle fontStyle = FontStyle.Regular, StringFormat ...

I'm currently working on creating an Ambilight for my computer monitor with C#, an arduino, and an Ikea Dioder. Currently the hardware portion runs flawlessly; however, I'm having a problem with de...

I have a changing sized image, and I would like to know which font size I should use to fit that dynamically changing size. As you know, there is a Graphics.MeasureString method, which calculates t...

I made a Custom Control with the functions of a Button. The problem with this controls is that when you hover over it, the color of the button changes: when this action is repeated quickly, it glit...

The GDI+ generic error when saving a bitmap is obviously a common problem according to my research here on SO and the web. Given following simplified snippet: byte[] bytes = new byte[2048 * 2048 *...

I am making a median filter, the problem is manipulating pixes are only possible in Bitmap. Later I want to show the result in a PictureBox which uses Image. I can't figure out a way to to solve th...

Issue: Attempting to zoom (scale) an Image from (or at the) mouse location using transforms in the Paint event to translate bitmap origin to mouse location, then scale the Image and translate its o...