I am converting between GDI (Win32 API) and different drawing format that also supports text and glyph rotation. Text output in GDI is specified with a reference point (and vertical alignment), but it is easy to take that into account when the...

GDI

Win32

font

Find GDI Leaks With Windows Debugger

25 Apr 2023 by Shao Voon Wong

Tracing GDI Leaks with Windows Debugger

C++

GDI

Drawing Rich Text with GDI+

14 Oct 2022 by Andy De Filippo

Render Rich Text with GDI+ by tapping into the power of API hooking

Reflected Image in C# with GDI and Unchecked Code

11 Apr 2022 by AdventureDriver

Creating a optionally sheared mirrored image from a source image in a collage

C# Bitmap Save Generic GDI+ Error

18 Sep 2021 by Storm Kiernan

This code is giving me problems: private void SaveBMP(Bitmap bmp) { bmp.Save(_project.MapFilePath); }This line throws a generic GDI+ error.bmp.Save(_project.MapFilePath);Any ideas?quote:It means that the file path points to an image that...

GDI

dwl::fractalBrowser

17 Jan 2021 by David O'Neil

Everybody Loves the Mandelbrot Set! Here's a browser for it!

Why can't I print my watermark in chrome and edge?

2 Dec 2020 by Member 14872681

Hello. I'm a developer who needs help. First of all, I hope you understand that the sentence structure can be strange as I ask questions using a translator machine. I am currently working on a program that requires watermarking on any...

C++

GDI

hooking

Why does function createpolygonrgn() fail?

19 Sep 2020 by Patrice T

your code is very simple minded, and it is bad. Quote: i use Timer which redraws the digits every 100 milliseconds. A simple test can divide by 10 the workload of redraw: if (LastTime != NewTime) { redrawClock(); LastTime = NewTime; } ...

Why does function createpolygonrgn() fail?

19 Sep 2020 by Avtem

So i'm trying to create a digit clock using only WinAPI with C++ (see the screenshot)[^] Function drawDash() is called 7 times to draw one digit. i use Timer which redraws the digits every 100 milliseconds. Everything looks fine, but for...

Why does function createpolygonrgn() fail?

19 Sep 2020 by Rick York

Since you are using C++, I recommend writing a class to handle this for you. Here's one possibility : template class handleobj { public: handleobj( T h ) { m_handle = h; } virtual ~handleobj() { if(...

Why does function createpolygonrgn() fail?

19 Sep 2020 by KarstenK

Your problem is here:FillRgn(hdc, hrgnClip, CreateSolidBrush(color)); in creating a brush and NOT deleting it. Asign it to a var use it and than delete it later, or if the color is constant you need to create it only once. Your error case is...

Why does function createpolygonrgn() fail?

19 Sep 2020 by Richard MacCutchan

The only thing I can see that may be an issue is the following: FillRgn(hdc, hrgnClip, CreateSolidBrush(color)); DeleteObject(SelectObject(hdc, GetStockObject(WHITE_BRUSH))); Are you certain that DeleteObject is actually deleting the solid brush?

Special 'Graphics' Objects to Draw Anywhere on Your Window

15 Aug 2020 by Mohammad Dehghan

Creating special 'Graphics' objects to draw anywhere on your window, including non-client area

Capturing wrong part of the screen

8 Jul 2020 by MyOldAccount

I have created a small demo app which window looks as below: https://i.stack.imgur.com/iW05q.png[^] When I run this demo app, and press any key, I want to capture the part of the screen bitmap. The part of the screen I am interested in, is the...

Capturing wrong part of the screen

8 Jul 2020 by KarstenK

You should respect the scaling how Richard wrote and also deal with multi monitor system. Some years ago I wrote an Repositioning Windows on Multiple Monitor Systems article which deals with that issue. But nevertheless your foo function looks...

Capturing wrong part of the screen

8 Jul 2020 by Richard MacCutchan

See GetScaleFactorForMonitor function (shellscalingapi.h) - Win32 apps | Microsoft Docs[^].

Capturing wrong part of the screen

8 Jul 2020 by Dave Kreskowiak

It's capturing exactly what your code is telling it to capture. You have no choice but to run this code under the debugger, examining variables to make sure the values are what they are supposed to be. The code isn't doing what you think it's...

Geometry for Fun, in Corona Days, 2020

21 Apr 2020 by Yuksel YILDIRIM

Draw Multi Parametrik Shapes in 2D

Delphi

Windows

GDI

EBDT (Mono Embedded Bitmap Data in TrueType Font) to BM (BitMap)

3 Mar 2020 by LeisureBamboo

Randomly read any embedded_mono_matrix in TTF file, export it to bitmap files (in package)

Manually draw window caption with same color as normal windows

23 Feb 2020 by Rick York

I recommend writing what I call an enumerator applet. Here's a screenshot of one I wrote for system colors. I have written several of these but I had done this one yet and your question inspired me. Screenshot at ServImg.com[^] My point is,...

C++14

GDI

Win32

Manually draw window caption with same color as normal windows

23 Feb 2020 by deXo-fan

Hello, I wish to manually draw what looks like a window caption during the WM_NCPAINT event. I've made some progress, but I can't seem to get the color right. It's not the same as, say, Notepad's caption bar background color, which is RGB(0,...

C++14

GDI

Win32

Manually draw window caption with same color as normal windows

22 Feb 2020 by Gerry Schmitz

If I want to know a color, I take a screen shot, paste it into Paint.NET (or something similar) and use their eye dropper / color palate. The color palate gives the RGB settings for the selected color. Visual Studio's "image editor" also gives...

C++14

GDI

Win32

Design WinForms Controls using Photoshop

2 Nov 2019 by Alaa Ben Fatma

Use your skills as a designer to create gorgeous control

.NET

.NET-Compiler-Platform

Displaying 16 Bit RAW GRAY SCALE image data in VC++ (mfc)

1 Apr 2019 by SolarNigerija

I have 16-bit packed RAW GRAY SCALE images.each image may have different high bit, for example: 9,11,13, or 15 (10,12,14, or 16 bits per pixel respectfully). Building and using image statistics I can calculate min/max pixel values, and expand dynamic range of image to 16-bit per pixel/or using...

C++

GDI

MFC

Displaying 16 Bit RAW GRAY SCALE image data in VC++ (mfc)

1 Apr 2019 by SolarNigerija

To conclude the story. WPF, DX, or anything else first needs Hardware (Graphics card+Driver) for displaying anything beyond 8-bit gray-scale (unless we use software fallback which we do not). So generally speaking we need to query hardware support for bit depths beyond 8-bit gray-scale. And...

C++

GDI

MFC

2D Polyline Vertex Smoothing

1 Apr 2019 by veen_rp

Smooth a 2D polyline through interpolation (Catmull-Rom) or approximation (Chaikin)

How to create grayscale icon with correct transparency?

18 Nov 2018 by XTAL256

Hello, I have some code that uses GDI+ to convert an icon to grayscale*. However, when transparency (i.e. alpha channel) is involved, the resulting icon seems to use pre-multiplied alpha - rather than normal alpha - making the transparent pixels look darker. * Create GDI+ Bitmap from HICON,...

Graphical BinaryTrees

7 Oct 2018 by Mojtaba Hosseini

A graphical binary tree. Features: add, remove, or search for a node. Recursive algorithm has been used

TransparentSplash Control

4 Oct 2018 by TwinLane

A non rectangular/transparent splash screen control that starts life before the Application Form

Width of Text in Italic Font

25 Jul 2018 by Alexandru Matei

Shows an alternative to GetCharABCWidths and GetCharABCWidthsFloat

Does somebody have a C# code snippet for a lightning bolt symbol ?

8 May 2018 by BillWoodruff

Like this one 🗲 or this one 🗱 or 🌩 ... these are characters in the Windows Webdings font: [^]. You can easily scale these up, and take a screen shot, and then create ... whatever. Or, you can take a Label Control whose text is the symbol, set its 'BackColor to 'Transparent, and then set its...

GDI

Does somebody have a C# code snippet for a lightning bolt symbol ?

8 May 2018 by SuperMiQi

Hello Everyone, I am looking for the small snippet c# code to draw a lightning bolt symbol. To give you an idea, I am looking for the code the generate this kind of image: lightning bolt. Even a non filled in lightning bolt symbol would be great. Thank you very much in advance. Best regards....

GDI

Does somebody have a C# code snippet for a lightning bolt symbol ?

8 May 2018 by Dave Kreskowiak

Seriously? You want someone to generate coordinates for 7 points for you? How about this. You generate them. It's easy. Grab a piece of paper, a pencil, and a ruler. Draw your lightning shape on the paper. Measure the width of the shape. The top left is going to be 0,0. The top right is going...

GDI

Fixing Inconsistent Stroke Width of Chinese Characters

29 Jan 2018 by Shao Voon Wong

Fixing Inconsistent Stroke Width of Chinese Characters

Winforms Transparent Background Image with Gradient Alpha Colors

11 Jan 2018 by Jesusfan

Create a draggable, proper splash screen in DotNet, with gradient transparency!

Theme GDI+ C++ how to create theme

14 Jul 2017 by Member 11346124

I find .Net Theme Created using GDI+. i am looking for Creating theme using GDI+ C++. where can i find tutorial. i Googled it but i only find draw line and such which are not i am looking for or i guess i need tutorial or help. Any suggestion or guide highly appreciated! ThanksWhat...

Theme GDI+ C++ how to create theme

14 Jul 2017 by KarstenK

At first a theme is an installation package with some defined content. Her you find the Theme File Format described from Microsoft. Developing an own theme is a big task. I think the basics are handled in the in the outstanding article Custom Controls in Win32 API: Visual Styles and some good...

Create an image that looks like the windows display settings screen

26 Jun 2017 by F-ES Sitecore

This should hopefully get you started static void Main(string[] args) { // 120 x 120 thumbnail Bitmap image = new Bitmap(120, 120); Graphics g = Graphics.FromImage(image); g.Clear(Color.White); Pen p = new Pen(Color.Black, 3); // Primary display g.DrawLine(p,...

GDI

Create an image that looks like the windows display settings screen

26 Jun 2017 by dandy72

Hi all, Has anyone ever looked at programmatically recreating the monitor layout as shown by the Display Settings dialog box in Windows? I'm talking about the screen that shows all your monitors, and how they're positioned relative to each other. On Windows 10, you get there by right-clicking...

GDI

Create an image that looks like the windows display settings screen

26 Jun 2017 by Dave Kreskowiak

Quote: My question: Has anyone ever tried to use those values to render an Image from them? Obviously I wouldn't want something that's 1:1; a small-ish thumbnail is all I'm after. Bonus if it can display coordinates at each monitor's top-left/bottom-right corners and identify them by name...

GDI

Create an image that looks like the windows display settings screen

26 Jun 2017 by OriginalGriff

Quote: I just don't have the patience to sit down with pen and paper and figure out exactly how to render all the elements using GDI Then I suspect that this app isn't going to happen: if you can't be bothered to do the work, why would you think we would want to do it for you? If you want...

GDI

How do I release a handle to a GDI region in a pointer array?

3 Jun 2017 by Regg Fulton

In my app I paint rectangles on a picturebox in diferent locations. I can drag them around with the mouse and even rotate them with the mouse wheel. At first I used pictureboxes, but rotating them became a hassle, so I created my own class instead. My class holds the drawing point points of...

GDI

How do I release a handle to a GDI region in a pointer array?

3 Jun 2017 by Regg Fulton

Never mind. I solved the problem. The solution was ridiculously easy. I did away with ptrRegion(sx) = rgn.GetHrgn(g) instead keepig the region and a pointer to the region as properties in my class called BorderRegion and BorderRegionPtr. Then replace this Dim rgn As System.Drawing.Region...

GDI

IsoGame Engine

18 May 2017 by darkoman

Article about the 2D isometric game engine

Capture Program using GDI

29 Mar 2017 by Taehoon Kim 1004

Capture program using GDI

GtProject: A C++ Project Management Control for GT Graphical User Interface Library

1 Mar 2017 by trident99

GtProject is intended to provide the user a Microsoft Project equivalent control to use for scheduling tasks.

Drawing on owner draw picture control

1 Mar 2017 by Member 12677926

i am converting my code from vb to c++ there are some dynamic points which are there to draw different shapes.in vb they have properties such as .ScaleWidth, .ScaleHeight, .ScaleTop , .ScaleLeft.what they had done is they had scaled according to width and height using these properties ...

C++

GDI

MFC

Drawing on owner draw picture control

1 Mar 2017 by KarstenK

With C++ and MFC you have the power and responsibility to draw each pixel for yourself. For that you must scale what you want to draw in the drawing rectangle. There are two way:1. scale the content coordinates before drawing them (recommanded for your DrawLine)2. draw an offline...

C++

GDI

MFC

GT: A C++ Graphical User Interface Library and System

13 Feb 2017 by trident99

GT is a compact, efficient, and customizable graphical user interface (GUI) library for the Windows environment.

Simple Graphics Class

12 Dec 2016 by Farhad Reza

A simple graphics class for 2D drawing

Unicode Buddy

6 Nov 2016 by yetibrain

Unicode Buddy is a tool to inspect unicode files. It can detect orphaned surrogates and invalid utf-8 sequences. It is able to show the encoding/decoding of a certain codepoint. It is not an editor but a viewer.

HELP my tattoo is bumpy and hard!

29 Oct 2016 by OriginalGriff

Find a tattoo site and ask there.This is a software development site and we are not body modification experts.Or talk to the tattooist / your doctor / emergency medical people.

Instantly Increase the Value of your Windows Application

12 Oct 2016 by gricardi

As users are migrating from traditional desktops to mobile devices, transitioning your Windows application to the web is the next step to increasing your exposure. Thinfinity VirtualUI delivers your Windows applications to users on any device, anywhere.

Creating Simple PNG Decoder/Encoder

26 Aug 2016 by Javad Taheri (drjackool)

Creating Simple PNG Decoder/Encoder

VisualStudio-Like TabControl

23 Aug 2016 by Alaa Ben Fatma

Inherits the awesome style of Visual Studio's TabControl for better exploiting

Rendering Transparent PNGs with C# and Windows Forms

7 Aug 2016 by User 9149614

Preserving alpha channel drawing transparent PNGs

[tut 9] hand tool (part 2) navigator panel

3 Jul 2016 by The Zakies

we will continue the functionality of the hand tool with having a navigator panel which works as a map, we will also have a red rectangle which tells the user where he is actually viewing inside the whole form, also it can be moved to pan the form

[tut 8] Hand tool

29 Jun 2016 by The Zakies

we would create Hand_tool to pan through the drawing form, and we would use a custom cursor of open and closed hands

[tut 7] Drag & Drop points in lines

24 Jun 2016 by The Zakies

in this tut we will create a technique to enable the user to control points within a drawn line, by drawing circles around points of the line , when the user clicks a circle he would control the corresponding point.

Advanced Image Control

18 Jun 2016 by Patrik Mlekuž

Image Control for viewing most common image formats with advanced features included (Import Image, Preview, Resize, Position, Pan, Zoom, Export Image, Extract Resource Icon).

[tut4] Draw Lines with Circle and Rectangle End

7 Jun 2016 by The Zakies

[tut4] how to draw lines & to draw different types on end shapes like rectangle and circle using C#

How to Use a Font Without Installing it

12 Apr 2016 by Shao Voon Wong

How to use a font without installing it first on user systems

[tut 3] Graphics Program using C# Drag & Drop & Delete Objects

7 Apr 2016 by The Zakies

Part 3 of a tutorial to show a graphics program using C# using GDI and SVG drag and drop and delete objects

Gdiplus and directshow video renderer

29 Feb 2016 by mOOmOOn_

Hi,I developped an application capable of playing video with DirectShow and scrolling text with layered windows. Text is drawn using GDIPlus.I remarked text was sometimes stuttering when using EVR renderer.I could point out that stuttering occurs exactly during the RenderFile method...

C++

GDI

directshow

OpenGL in Python with TKinter

25 Jan 2016 by Samuel Teixeira

Why simple if we can be complex?

A Polygon-triangulation Algorithm with Time Complexity O(N*logN)

16 Jan 2016 by Mathew_wwx

This tip will introduce a library written in C++ that wraps up a 2d polygon triangulation algorithm with time complexity of O(N*logN), the algorithm works on both self-intersected and non self-intersected polygons.

How can I Draw Puzzle Piece with GDI+?

11 Dec 2015 by CHill60

Have a look at this CP article Professional C# - Graphics with GDI+[^]There is also a reference zone[^] here on CPOr there always the M$ documentation[^]

How can I Draw Puzzle Piece with GDI+?

11 Dec 2015 by Umut Comlekcioglu

Hello everyone,I'm developing Puzzle Game for my little brother. I wanna drawing Puzzle Piece like below. http://postimg.org/image/q5j410d3p/[^]I can't use Bitmap or Picturebox. So I need to draw it with Graphics Path but I don't know too much about Graphics Path.Anyone can help...

String Concatenation vs Memory Allocation in C# .NET

21 Nov 2015 by zenwalker1985

Dear Reader, I would like to bring into your attention an old article written on this topic. This article explains alot about strings concatenation and does very good performance analysis. Here is a glimpse about this article: Over the years, plenty has been written about... Read More

C++

Windows

GDI

Clock Frame Design Using Assembly

14 Oct 2015 by Farhad Reza

Here, we will design a clock frame with Assembly Language and GDI32

GDI+ transformation problem

12 Sep 2015 by rezaasaadi

I use GDI functions to render vector data for many years,even after migration to C# and dotNet,I still use GDI libraries because I found GDI much faster than GDI+ in vector rendering.Now I have stuck in a problem where I have to use GDI+ and face a problem.My vector coordinates are in real...

GDI

transform

ToggleSwitch Winforms Control

11 Sep 2015 by Johnny J.

A ToggleSwitch that presents on/off values in a more interesting way than a standard CheckBox

Simple ChessBoard Graphics

8 Sep 2015 by Farhad Reza

A simple ChessBoard graphics using GDI32

Basic Base64 Encoded Image Viewer

5 Aug 2015 by sreeyush sudhakaran

VB.NET code for Base64 Encoding and Decoding of Image files

GDI DrawString Configurator App

26 Jul 2015 by Petr Bříza

This app helps you with understanding and using GDI DrawString function: precise measuring, positioning, quality setting and performance tuning.

Fastest desktop screen capture method for capturing presently running application on desktop and casting it to an external monitor

1 Jul 2015 by Member 11806482

I am creating a screen capture application which can capture presently running application on desktop (be it a fullscreen game or a video or simply desktop) and render it onto an external monitor.I read various questions on stackoverflow and refered different blogs about screen capture using...

How to fill region between two lines GDI C#

14 Jun 2015 by Sergey Alexandrovich Kryukov

No, don't fill closed curve; instead, build and fill the region:https://msdn.microsoft.com/en-us/library/system.drawing.graphics.fillregion%28v=vs.110%29.aspx[^],https://msdn.microsoft.com/en-us/library/system.drawing.region%28v=vs.110%29.aspx[^].—SA

GDI+

GDI

How to fill region between two lines GDI C#

14 Jun 2015 by Member 8727660

I want to fill region between two lines in in a c# graphics using c#.i'm using drawlines method to draw the two curvespoints.Add(new PointF(x + left, (float)y + trackHeight));...if (points.Count > 1) { using (Pen pen = HandlerGraphs.GetPen(log.LineStyle, log.Brush,...

GDI+

GDI

Draw curve itextSharp

25 May 2015 by Raje_

You can try these :http://stackoverflow.com/questions/25796669/draw-a-graphicspath-in-a-pdf[^]http://www.mikesdotnetting.com/article/88/itextsharp-drawing-shapes-and-graphics[^]Good luck :)

WinForms

GDI

itextsharp

Draw curve itextSharp

25 May 2015 by Member 8727660

i want to draw a Curve (image) in a Pdf document using itextSharp, how can i pass automatically to next page?

WinForms

GDI

itextsharp

GdipDrawImage of GDI+ returns 0 ,but the picture doesn't show on my picture control

28 Apr 2015 by Richard MacCutchan

Don't use LoadLibrary, link all standard libraries into your application, that will ensure that you get the correct versions. And you should not be using plain C to use GDI+ as it is an object based system: see http://msdn.microsoft.com/en-us/library/ms533798(VS.85).aspx[^].You are also...

GdipDrawImage of GDI+ returns 0 ,but the picture doesn't show on my picture control

28 Apr 2015 by Sergey Alexandrovich Kryukov

Before starting to deal with any runtime issues, throw out this code and write it in human way. Look at the two first lines inside the implementation of LoadImgFromGDIP: you call LoadLibrary again and again with the same DLL. This is not yet a reason for some runtime failures, but this is more...

GdipDrawImage of GDI+ returns 0 ,but the picture doesn't show on my picture control

28 Apr 2015 by Member 11643863

void LoadImgFromGDIP(){ GdiplusStartup GDIPStart = (GdiplusStartup)GetProcAddress(LoadLibrary(TEXT("gdiplus.dll")), "GdiplusStartup"); GdipCreateFromHDC GDIPCreate = (GdipCreateFromHDC)GetProcAddress(LoadLibrary(TEXT("gdiplus.dll")), "GdipCreateFromHDC"); GdipLoadImageFromFile...

C# Bitmap Save Generic GDI+ Error

10 Apr 2015 by hisham ahmed

Bitmap newBmp = new Bitmap(bmp);bmp.Dispose();newBmp.Save("yourPath");MessageBox.Show("Saved");

GDI

Extreme Realtime Music Visualizer

23 Mar 2015 by Novar Striker

Multi technics in one application, for an extreme relaxation moment

Zom Out malfunctions when Screen resolution changes

22 Mar 2015 by Sergey Alexandrovich Kryukov

I've done this screen-independent layout (with and without zoom) many times and never had problems.There are few simple rules you can check.Look at your design-time generated form code (as C# source) and find all immediate constants of integer types. You should not find a single one that...

GDI

Animated Image Slide Show

28 Jan 2015 by syed shanu

Animated Image Slide Show for Winforms using C#

Control Chart Using .NET

27 Jan 2015 by syed shanu

USL/LSL Control Chart using .NET for Quality Control

SPC XBAR and Range Chart

25 Jan 2015 by syed shanu

XBAR and Range Chart using C#

DataGridView RowPrePaint problem on horizontal scroll

23 Jan 2015 by Pikoh

I've a problem i've been struggling with for some days.I've got a DataGridView, and I'm using the RowPrePaint event to add a custom row by drawing a string and a background. So far,so good.The problem comes when i use horizontal scrolling. Moving it to the right is not a problem, the...

WinForms

GDI

Theme Selector Based on HTML5 Local/Session Storage: The Simplest Thinkable One

8 Jan 2015 by Sergey Alexandrovich Kryukov

Combination of jQuery and HTML5 allows implementing themes purely on client side

hookapi to make printer to image

23 Dec 2014 by hiroyukki

I encountered the same problem when I writing printer content monitor.I hooked StartDocW EndDoc StartPage EndPage and hook many GDI APIS (DrawTextExA, FillRect ...)when StartDocW occured.I tee gdi actions to emf file to get the printer content. It works ok usually, but as same as your...

Draw Behind Desktop Icons in Windows 8+

22 Dec 2014 by Gerald Degeneve

Draw or render a Windows Form directly over the Wallpaper, behind the Desktop Icons in Windows 8+10

C# Correctly Get String Width in Pixel

29 Nov 2014 by BillWoodruff

Using the default 'MeasureString and 'DrawString: leading-space and trailing-space may be automatically added when the string is rendered:"The MeasureString method is designed for use with individual strings and includes a small amount of extra space before and after the string to allow for...

C# Correctly Get String Width in Pixel

29 Nov 2014 by DamithSL

try with TextRenderer.MeasureText Method[^] sample code : String text1 = "Measure this text"; Font arialBold = new Font("Arial", 12.0F); Size textSize = TextRenderer.MeasureText(text1, arialBold); TextRenderer.DrawText(e.Graphics, text1, arialBold, new...

C# Correctly Get String Width in Pixel

29 Nov 2014 by Umut Comlekcioglu

Hi everyone,I'm developing new software for me. But I have a little problem. When I wanna get the String Width, already I use that code;float aa = pe.Graphics.MeasureString("PROGRAMMING", Font).Width;But this value is not correct. When I test that line with that...

What’s New in C# 6.0? - String Interpolation

25 Nov 2014 by Kunal Chowdhury «IN»