Bitmap

Great Reads

Count Number of Unique Colors in an Image

by #realJSOP

Determine the number of unique colors in an image

Displaying Bitmaps Efficiently on Android Apps

by Isaac RF

To create visually engaging apps, displaying images is a must. Learn to display Bitmaps Efficiently on your Android apps, without giving away performance. The post Displaying Bitmaps Efficiently on Android apps appeared first on Isaac RF.

Programming Nostalgia: revisiting Mike Wiering’s Mario Game Written in Pascal

by ToughDev

Revisiting Mario Game Written in Pascal

FITS to image and image transparency

by V.

Convert FITS file to known image formats and use those images for a "zooming" functionality (image transparency)

Latest Articles

Image Resizer: Monitor Folders for Incoming Images and Resize or Convert Formats Automatically

by honey the codewitch

Image Resizer automatically resizes images you drop in a monitored folder based on criteria you give it. It can also change image formats.

Programming Nostalgia: revisiting Mike Wiering’s Mario Game Written in Pascal

by ToughDev

Revisiting Mario Game Written in Pascal

Very Fast Image Blur in C# using Direct Bit Manipulation in Pure .NET

by pdoxtader

Very fast image processing without use of unsafe code

GFX Part 4: The ILI9341 Display Driver and JPEG Support

by honey the codewitch

Use an ILI9341 display efficiently from an ESP32 without the Arduino framework. Load JPEGs.

All Articles

top

Bitmap

Count Number of Unique Colors in an Image

19 Feb 2011 by #realJSOP

Determine the number of unique colors in an image

WinForms

Bitmap

Displaying Bitmaps Efficiently on Android Apps

24 Aug 2016 by Isaac RF

Programming Nostalgia: revisiting Mike Wiering’s Mario Game Written in Pascal

11 May 2023 by ToughDev

Revisiting Mario Game Written in Pascal

FITS to image and image transparency

8 Apr 2016 by V.

Convert FITS file to known image formats and use those images for a "zooming" functionality (image transparency)

GFX Part 4: The ILI9341 Display Driver and JPEG Support

4 May 2021 by honey the codewitch

Use an ILI9341 display efficiently from an ESP32 without the Arduino framework. Load JPEGs.

C++ word recognition from an image (OCR)

21 Feb 2011 by Manfred Rudolf Bihy

Try this CP article for starters: OCR With MODI in Visual C++[^] and here you'll find an open source .NET C++ library: http://www.pixel-technology.com/freeware/tessnet2/[^]Modification:MODI has been deprecated in MS Office 2010. The replacement is OneNote and here is a useful link to...

C++

OCR

Bitmap

rotating a bmp file using C++ ?

22 Feb 2015 by Sergey Alexandrovich Kryukov

I was afraid that my suggestion to "think a bit" could possibly offend you a bit, so I probably have to illustrate what this thinking could mean.Suppose you have some bit data, which tells you (forget the "format", it is irrelevant):you have width = 3, height = 2, and pixels data...

Approach to Paste a Bitmap into an Icon Image on ReactOS (and Consequently on Windows XP and Newer Versions, using Win32 API)

27 Dec 2020 by Steffen Ploetz

Step-by-step instructions and source code snippets for inserting a bitmap (or a section of it) into an icon image.

Create a bitmap object from memory

3 May 2011 by CPallini

Why don't you use CImage[^] instead?It can directly load jpeg and png files.

Create a bitmap object from memory

4 May 2011 by Niklas L

The Load()[^] method of CImage, as Pallini suggested, can operate on an IStream instance. You can create such an instance using CreateStreamOnHGlobal()[^] API.

Freeing up memory. Bitmap.

25 Mar 2013 by Sergey Alexandrovich Kryukov

It looks like you are using System.Drawing and System.Windows.Forms. You should always tag the libraries you use for UI and graphics.Look at the Bitmap class. It implements System.IDisposable. It means that, whatever you do, you should eventually call System.IDisposable.Dispose for each...

System.Drawing

Bitmap

Is there any can convert a bitmap to YUV frame quickly?

8 Apr 2013 by Matthew Faithfull

When you say you have a bitmap I guess you have an RGB or BGR bitmap?To do a one off file conversion I would get a copy of IrfanView[^] . In fact I would get it anyway if you don't have it as it is the best tool I know for viewing not quite correctly formatted image data.If you are...

How to Set a New or Change / Exchange / Replace the Image of a Toolbar Button

21 Feb 2021 by Steffen Ploetz

My best practice approach to change the image of a toolbar button

Very Fast Image Blur in C# using Direct Bit Manipulation in Pure .NET

17 Apr 2023 by pdoxtader

Very fast image processing without use of unsafe code

How to do fast bitmap stretching?

15 Mar 2011 by Olivier Levrey

If you want to really improve your image display, then consider using hardware accelerated functions. Use DirectX or OpenGL libraries.Once, I used DirectX and sprites to display a 2D image (and a few more things). I will copy the code that worked for me, but please note I am not a Direct3D...

C++

Bitmap

directshow

C# Drawing a line from (bitmap image)dot to (bitmap image)dot.

8 Apr 2011 by Olivier Levrey

Is it really necessary to use an image? Can't you draw directly inside your form?You can use the MouseDown event to get the click position, and Paint event to redraw your line: public partial class Form1 : Form { public Form1() { ...

Bitmap

C++ 2d array to bitmap

23 Jul 2012 by enhzflep

I'd have preferred to add this code to a comment, but it's just impractical for so many reasons.Here's the code I had in the project I mentioned earlier. It does seem a bit funky now, some 4 1/2 years on - I think saveBMPfloat would be the easiest/quickest to modify. Just snip/replace the...

C++

Bitmap

how to improve printed text quality after using “graphics.DrawString”?

26 Jul 2012 by Dave Kreskowiak

It's not entirely clear what you're doing, so are you saying that you're writing this text to an image and then printing the image??Yeah, that's going to severely screw up any aliasing you do. Why??Because the image that you're drawing on is 96 DPI and when you print that image on...

Bitmap

graphics

Bitmap combination

27 Aug 2013 by huyletran

Create a new bitmap by combining many bitmaps.

Can not obtain dialog's background bitmap from treeview's subclass procedure

4 Apr 2014 by KarstenK

you must transform with the right HWNDHWND hParent = GetParent(hwnd);ClientToScreen( hwnd, &ptTreeUL );ClientToScreen( hwnd, &ptTreeLR );//dont write such code ;-)ReleaseDC( GetParent(hwnd), pDC );tip: create the bitmap globally once to improve performance

Bitmap region is already locked

9 Jun 2014 by Sergey Alexandrovich Kryukov

What is unclear in this error message? It is quite straightforward. You are doing wrong thing: you cannot lock bits on the same Bitmap b twice and work with bmpData and bmpData2 at the same time. And, in practice, it's never needed. You can create bitmap data once, do what you need to do with...

Bitmap

How to find object location on Bitmap

5 Aug 2014 by Sergey Alexandrovich Kryukov

I answered to similar questions several times. I advise to use AForge.NET, its blob recognition. I successfully used it and was pleasantly surprised with performance and quality of the results. Please see my answers:URGENT PLZ - image Processing in c#[^],image processing using Aforge.net >>...

Bitmap

What reference do I need to add to a Windows Store app to use the Bitmap class?

21 Oct 2014 by DamithSL

Add: using Windows.UI.Xaml.Media.Imaging;Reference: Loading and processing bitmaps[^]

C#5.0

Windows-Store

Bitmap

how to merge two images without merging their borders

12 Dec 2014 by Maciej Los

Have a look here: Merging Images in .NET[^]More, you can find here: SearchBox[^]

Design

Bitmap

graphics

rotating a bmp file using C++ ?

21 Feb 2015 by nv3

Just exchanging width and height will not rotate the image. You also need to rotate the bitmap data pixel by pixel. That requires quite a bit of buffer handling and data shoveling. For an example how to do it, look here: Add fast user-extensible image processing support to CBitmap[^]

How to move a bitmap on android canvas ?

28 Feb 2015 by Sergey Alexandrovich Kryukov

As in many other graphics rendering system, your code is the handler of some event invoked when the drawing is required. You hard-coded the bitmap coordinates, so what would you expect. You have to make these coordinate depending on some field(s) of declaring class, say, bitmapX, bitmapY. You...

Structure RGB values back into BITMAP image file

12 Oct 2015 by bling

I do not know if this will fix all your problems but, try replacing this: array_1D[offset + i+0] = arrayB_2D[j][counter++]; array_1D[offset + i+1] = arrayG_2D[j][counter++]; array_1D[offset + i+2] = arrayR_2D[j][counter++];... with this ... array_1D[offset + i+0] =...

How can I stop flickering when I have a large number of dynamically created rectangles to display on screen.

4 Nov 2015 by bling

Your paint handler looks strange to me. private void Form1_Paint(object sender, PaintEventArgs e) { gDisplay.DrawImage(bitmap, new Point(0, 0)); }Try this:private void Form1_Paint(object sender, PaintEventArgs e){ ...

Bitmap

graphics

Prevent "out of memory" exceptions when creating bitmaps from smaller images

27 Mar 2016 by Sascha Lefèvre

Quote:Others say that although this is important, they don't actually do much in terms of memory issues.When not using using-statements the CLR eventually comes around to cleaning up those objects but there's no guarantee on when this will happen. So it can lead to inconsistent behaviour. When...

Change wallpaper with C# or remove the wallpaper for good

30 Apr 2016 by Richard MacCutchan

See also Wallpaper Changer[^].

Copy a GL Texture to Another GL Texture or to a GL Pixel Buffer and from a GL Pixel Buffer

13 Oct 2018 by Steffen Ploetz

How to use GL's pixel buffer object (PBO) to copy one texture to another

GFX Part 2: Device Independent Bitmaps

17 Apr 2021 by honey the codewitch

GFX IoT graphics library part 2 - device independent bitmaps

Converting from Windows.Media.DrawingImage to Windows.Media.Imaging.BitMapImage or Windows.Media.ImageSource

3 Aug 2011 by nervous_cat

Am having some trouble that i'm recieving an input from wpf that is of type Windows.Media.DrawingImage and I need to convert it to either windows.media.ImageSource or to windows.media.BitmapImage inorder for me to convert those into System.drawing.bitmap or System.drawing.image.I have...

WPF

Bitmap

image

Converting from Windows.Media.DrawingImage to Windows.Media.Imaging.BitMapImage or Windows.Media.ImageSource

6 Aug 2011 by Sergey Alexandrovich Kryukov

There is one pretty brutal way of doing it: write a bitmap to MemoryStream using one library and read it using another one; this method works in both directions.If you needed to go from System.Drawing to System.Windows.Media, the solution would be in using System.Windows.Interop.Imaging,...

WPF

Bitmap

image

position of picture in C#

13 Sep 2011 by OriginalGriff

DrawToBitmap only draws from the TLHC of the source control, as it assumes that the whole control (in this case, probably an entire form) will be required. If you want just a portion, then you need to draw the whole control into a suitable bitmap, then draw a portion of that image into a new...

Bitmap

find a point in vector file(.emf) without bitmap converting in C#.net

18 Sep 2011 by Sergey Alexandrovich Kryukov

This is quite possible but not quite trivial. EMF file is not exactly a container of vector graphical primitive. It is rather a sequence of events and can be "played", much like a video, to get displayed. You can find the EMF's elements by using the method...

Bitmap

processing

OPEN MP bitmap-matrix computation

22 Nov 2011 by JackDingler

You're sharing the single 'pos' variable among all of your threads.You'll get random values, as each thread is sharing the same location and writing and reading from it. Who knows what value it will have by the time the thread gets to the next line? And even in that line, the value can...

C++

Bitmap

Accessing a bitmap with pointers

16 Jul 2012 by Sergey Alexandrovich Kryukov

As I can see, you manipulate the bitmap and then completely forget the result, replacing it with a brand new instance of a bitmap (a line of code with new Bitmap(&hellip)).Besides, the name "m_PicBoxes" suggests that you use the class System.Windows.Forms.PictureBox, which is not a very good...

image

Bitmap

processing

C++ 2d array to bitmap

24 Jul 2012 by nv3

In my opinion you are making things more complicated than they have to be. Here is the code that allocates your 2-dimensional array: int** array_ptr; array_ptr = new int * [1000]; // 1000 row pointers for(int i = 0; i

C++

Bitmap

how can I improve image quality for printing?

31 Jul 2012 by Christian Graus

The only real way to improve print quality is to create a larger bitmap that is finer quality. GIGO.graphics.FromImage(bitmap) creates an exact copy, though, you should not lose quality doing that.

Converting a BitmapImage

6 Sep 2012 by Amund Gjersøe

According to Microsoft you should be able to use BmpBitmapDecoder (or the decoder of choice). I've tested, and it worked:Stream bmpStream = new System.IO.FileStream("smiley.bmp", FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);BmpBitmapDecoder bmpDecoder = new...

Bitmap

conversion

convert

convert from PDF to Bimap

28 Sep 2012 by Richard MacCutchan

A PDF file is not a simple byte array, it is a structured file consisting of different content elements. Go to the Adobe website and get a copy of the PDF documentation for further information.

Bitmap

Metro-design

PDF

[C#] RTF text to bitmap image? Any easy way around?

21 Oct 2012 by Jackie00100

I found this class recent extending the graphics class, i changed it a little, and it does everything i could ask for!using System;using System.Drawing;using System.Runtime.InteropServices;using System.Windows.Forms;using System.Drawing.Imaging;using System.Text;public static...

Сhange value of PropertyTagImageDescription (Bitmap/C#)

11 Jan 2013 by Jibesh

Check whether the property you are looking is valid for the image. If PropertyItems collection is empty you will end up with this error. read more here[^]

Bitmap

image

Bitmap Constructor Throws ArgumentException in Win XP but not Win 7 - why?

13 Feb 2013 by TRK3

It's patently false that the only possible exception is FileNotFound. The file could certainly existed but have an exclusive lock on it -- in which case the constructor would have to fail, but not because the file wasn't found.Documentation says:"The file remains locked until the Bitmap...

.NET4

.NET

Bitmap

How to keep the image size and decrease the amount of pixels?

19 Mar 2013 by Dave Kreskowiak

You don't.Reducing the number of pixels will ALWAYS reduce the image size. With a "reduced" number of pixels, you get the illusion of a larger image only when it's displayed by scaling up a smaller image fit a display area larger than the image. This results in a fuzzier display and a...

image-processing

Bitmap

How i can get the colors of a bitmap image and show them on a pallet

23 Nov 2013 by Richard MacCutchan

Iterate through the bitmap making a list of every pixel's colour, not forgetting to ignore duplicates. Then sort the list into whatever order you prefer, e.g. reds, greens, blues etc. Then go through the list and draw a shape in the window for each colour. See the GetPixel method[^] for further...

Bitmap

ClearType ruins transparency

10 May 2014 by AlwaysLearningNewStuff

I have a bitmap which background needs to be replaced with part of another bitmap. Everything works fine until I enable ClearFont on my WindowsXP.In order to explain my problem better, let us label first bitmap as bmpDestination and second as bmpSource.Here[^] is how the bmpSource looks...

C++

Win32

Bitmap

ClearType ruins transparency

10 May 2014 by leon de boer

I added this to your previous post it got messy so you probably missed it.There are ways around it but they are all slow and give different results which you have to choose between. There is no perfect solution because it is a bug or over-sight in windows Cleartype implementation.I...

C++

Win32

Bitmap

ClearType ruins transparency

11 May 2014 by leon de boer

I have studied carefully the code from your previous answer and managed to handle WM_WINDOWPOSCHANGED properly for multiple windows but I can not handle slight flickering.What is causing the flicker is the way the listbox draws each item you need to do you own drawing to solve the problem...

C++

Win32

Bitmap

ClearType ruins transparency

11 May 2014 by leon de boer

Oh I forgot I further improved your redraw and made it compliant to handling WM_PRINTCLIENT itself.case WM_PAINT: { // usual stuff PAINTSTRUCT ps; HDC hdc = BeginPaint( hwnd, &ps ); // Simply get printclient to paint ::SendMessage(hwnd, WM_PRINTCLIENT,(WPARAM)...

C++

Win32

Bitmap

Difference of two images

7 Jun 2014 by Sergey Alexandrovich Kryukov

Please see my comment to the question.One of the way to perform necessary calculations is using System.Drawing, more exactly:http://msdn.microsoft.com/en-us/library/system.drawing.bitmap.lockbits.aspx[^].There are some code samples on the pages of each of these methods, just to...

image-processing

Bitmap

How to convert DrawingVisual to Bitmap in WPF C#

9 Jun 2014 by Sergey Alexandrovich Kryukov

It's not clear what do you miss in this documentation. Pay attention: the method System.Windows.Media.Imaging.RenderTargetBitmap.Render takes the instance of System.Windows.Media.Visual as a parameter. And your class ModelBeamSectionNamesInPlan is UIElement and, consequently,...

WPF

Bitmap

Vb.net bitmap blurred when saved

25 Jun 2014 by OriginalGriff

Start here: Bmp.Save(str1 & "\" & str2, Imaging.ImageFormat.Jpeg)Don't use Imaging.ImageFormat.Jpeg - it's a lossy compression technique and that means that it "throws away" information ion order to save space every single time you save it. The chance are, this is the source of your...

drawing

Bitmap

Identify a black box on a bitmap file that contains black and white boxes

21 Jul 2014 by Sergey Alexandrovich Kryukov

Not only using GetPixel is prohibitively slow, it's just no serious. If you don't know how to develop image recognition by yourself (this is not easy at all), you can use one of the open-source libraries. I would recommend native .NET library...

Bitmap

graphics

how to merge two images without merging their borders

13 Dec 2014 by Member 10756761

i need a solution in C# to merge two separate images without merging a line between them at they merge..Problem picjust merg 2 images, a line show b/w them because of color difference, i want to disappear that line,CODE: private Bitmap Merge_Images(Bitmap bmp_1, Bitmap...

Design

Bitmap

graphics

how to merge two images without merging their borders

12 Dec 2014 by Thomas Daniels

This can be done using the Graphics class in the System.Drawing namespace. First, you have load the two images you want to merge. Then, you create a new empty Bitmap where the width is the sum of the two widths of the loaded images, and the height is the maximum height of those images. After...

Design

Bitmap

graphics

how to merge two images without merging their borders

13 Dec 2014 by BillWoodruff

Whether two images can be merged (composited) in a way that no unusual boundary (artifacts) will appear in the merged image, depends entirely on the images you are attempting to merge !And, I propose to you that ... unless you are in the fortunate position of having images with the same...

Design

Bitmap

graphics

Is there any ways to rotate a bmp 90 degrees using c++?

23 Feb 2015 by KarstenK

as barneyman wrote rotating the bmp in memory is the right solution.Read the outstanding article CXImage which provides some tons of features and also rotating code. In the sources you will find some code for rotating images.

C++

BMP

Bitmap

stuck in rotating a bmp photo 90 degrees using C++

25 Feb 2015 by CPallini

You have to take into account that bitmaps have rows aligned on 32 bits (i.e four bytes) boundaries (they are padded). The original bitmap, having width 800 doesn't need padding (hence is size is exactly 1646454 bytes) while the rotated image needs it (686 % 4 is non-zero), that is you need to...

C++

BMP

Bitmap

stuck in rotating a bmp photo 90 degrees using C++

25 Feb 2015 by Andreas Gieriet

Rotating a matrix by 90 degree is done by the following transformation of zero-based indices:A = N x M original matrixB = M x N transformed matrix (i.e. rotated by +90 degree)A[i,j] -> B[M-j-1,i]So, you read the data into the original matrix in memory, create a transformation matrix in...

C++

BMP

Bitmap

How to Draw AjaxControlToolkit TabPanel to Bitmap

20 Oct 2015 by Member 11999641

hi Members,I have ajax tab container that contains many tabs. I want to loop through each tab and draw the tab panel content to bitmap.This is my current codes:foreach (object obj in container.Controls) { if (obj is AjaxControlToolkit.TabPanel)...

How to Draw AjaxControlToolkit TabPanel to Bitmap

2 Nov 2015 by Suvendu Shekhar Giri

You can convert any DOM objects to image.Check this article for details and demoConvert (Export) HTML DIV or Table to Image using HTML Canvas in ASP.Net using C# and VB.Net[^]Hope, it helps :)

C++ Scanline functionality in embarcadero's builder

5 Jan 2016 by Dave Kreskowiak

I haven't touched C++ in about 5 years and I've never even heard of Embarcadero, but... it looks like your cast is being applied to the wrong item. Shouldn't it be something like:Sbyte = (TRBGTriple *)(Source->scanline[y]);

C++

Bitmap

How can I convert a 1D byte array of a bitmap into a 2D byte array?

6 Jul 2016 by Midi_Mick

Firstly, there are a few things to note in your report of the bitmap attributes: 1. Stride is usually reported in bytes, not pixels. 2. Each pixel is 4 bytes (32 bits). 3. This means that your offset or padding will be 0 (2048 bytes - 512*4 bytes).Each row of your bitmap...

image-processing

Bitmap

How to use bitmap in C#

24 Nov 2016 by F-ES Sitecore

You only include the namespace in the "using", not the class nameusing System.DrawingIf you're struggling to even create a class you're really going to struggle doing anything more advanced. I'd get a book on c# and start learning the basics before moving on to anything else.

Bitmap

Setalphabitmap not working

16 Jan 2017 by KarstenK

Create and populate the bitmap and the other stuff once at program start. These operations are "expensive" so do them as less as possible.//Gobal bitmapBITMAP bm = {0};// init with zerosvoid drawlineOverlay(HWND m_hwndApp){ //run code once if( bm.bmWidth == 0 ) { // set...

C++

Bitmap

directshow

Bitmap method clone(bitmap, format) will not compile

31 Oct 2018 by F-ES Sitecore

You're missing some parenthesis. newImage = ((Bitmap)image).Clone(sRec,PixelFormat.Format16bppArgb1555); In your original code "(Bitmap)image.Clone" You are calling the Clone method on whatever type image is, you're not calling it on image cast to Bitmap. By adding the parenthesis you are...

Bitmap

How many degrees should I rotate an image to correct it?

18 Dec 2018 by OriginalGriff

Repost, again. When you asked this question yesterday: Any ideas for scanning multiple choices answers?[^] I told you that the answer hadn't changed since the day before: How to crop an image in an appropriate way, C#?[^] I repeat: the answer doesn't change just because you don't like it.

C#7.0

Bitmap

image

How to detect whether an image is black

5 Feb 2020 by OriginalGriff

Look at the pixels (this may help: Bitmap.GetPixel(Int32, Int32) Method (System.Drawing) | Microsoft Docs[^] ) and compare them to Color.Black What did you expect us to tell you to do?

Bitmap

image

Why do we need to lock this data by bitmap.lockbits method

20 May 2022 by Richard MacCutchan

See the Remarks section at Bitmap.LockBits Method (System.Drawing) | Microsoft Docs[^].

Bitmap

C# is there a way to minimize a BYTE size of image before sending to server using sokcet

28 May 2019 by MinYoung Lee

I've been trying to develop Remote Desktop Program in C# and I want to make the BYTE size of my Image smaller. Here is my attempt below so far. // int w = Screen.PrimaryScreen.Bounds.Width; int h = Screen.PrimaryScreen.Bounds.Height; ...

Bitmap

Image Resizer: Monitor Folders for Incoming Images and Resize or Convert Formats Automatically

9 Feb 2024 by honey the codewitch

Image Resizer automatically resizes images you drop in a monitored folder based on criteria you give it. It can also change image formats.

Bitmap

image

Count Number of Unique Colors in an Image

19 Feb 2011 by a_pess

I think we may check if the color is repeated or not, any how this another alternative but in VB.NetPublic Shared Function GetImageColorsCount(ByVal bitmap As Bitmap) As Integer Dim ColorList As New System.Collections.Generic.List(Of Integer) Dim clr As Integer For...

WinForms

Bitmap

C++ word recognition from an image (OCR)

21 Feb 2011 by Member 7692532

What I'm trying to do is to recognize words from a BMP or preferably directly on screen. I honestly have no idea where to start with this. The best thing I can come up with is to have a preset image and compare it to where it should be on the screen, but that would require a lot of CPU and quite...

C++

OCR

Bitmap

How to do fast bitmap stretching?

14 Mar 2011 by kagelind

Hi I am trying to stretch a bitmapas fast as possible. I need to stretch 60 bitmaps per second. I am using StretchBltBits but when I use HALFTONE BltMode I only get 24-25 frames per second.The bitmap can be 16bpp, 24bppor and 32bpp 1024x576.is ther a faster way to strech the bitmap...

C++

Bitmap

directshow

MFC bitmap copy or get device context

26 Mar 2011 by nbd09

I have written some code to draw some lines etc in a device context and bitmap in ondraw class.I can save that bitmap using cimage but I want to access that bitmap from other button or class.The bitmap is not accessible from anywhere other than the ondraw class. I have also tried taking the...

MFC

Bitmap

Create a bitmap object from memory

3 May 2011 by quyps

Hi all,In my project, i receive an input as a memory block which is merely binary data read from an image file (.jpeg, .png).How can i create a CBitmap object from that?quyps,

Create a bitmap object from memory

3 May 2011 by Kozlov_Sergey

Create CBitmap with given dimentions, then use functionDWORD SetBitmapBits( DWORD dwCount, const void* lpBits);

Create a bitmap object from memory

4 May 2011 by quyps

Thanks alot! You are all right, it's the solution. I also found one here An MFC picture control to dynamically show pictures in a dialog[^]

How to make a Erase Brush/Pen

23 May 2011 by Sergey Alexandrovich Kryukov

How to do it totally depends on the data presentation of your image being edited. If this is just a bitmap and not a collection of Z-ordered bit-mapped objects (as in mature editors like GIMP and Photoshop), you have only two possibilities. Let's assume you render all your graphics on a bitmap...

Windows

Bitmap

forms

How to make a Erase Brush/Pen

24 May 2011 by 94HellGate

i found another solutioncreate a texture brush based on the texture you are drawing with opacity (using a ColorMatrix) and set the graphics option CompositingMode to SourceCopy and draw your circle or whatever.some code:float[][] matrixItems ={ new...

Windows

Bitmap

forms

Use a png image for icons stream

17 Jun 2011 by Keith Barrow

You should take a look at this thread on StackOverflow:http://stackoverflow.com/questions/384931/how-do-i-get-an-icon-from-a-png-image[^]Personally, I'd convert the png to ico (the thread has a link to at tool to do that) as it is the path of least resistance, but it is always good to have...

Bitmap question: HBITMAP

10 Jul 2011 by Bob Namenottaken

Using SetBitmapBits is confusing me. Is its sole purpose to transfer my array of pixel info to a buffer owned by the handle "HBITMAP" ?Is there a way to know where this buffer is located and write to it directly?Seems like a waste of time to draw on your own array and then perform a huge...

C++

Windows

Bitmap

Bitmap question: HBITMAP

10 Jul 2011 by Emilio Garavaglia

GDI object's internal data don't belong to your process but to the GDI subsystem. You cannot read/write to them directly because there is a "process boundary" in between (they can even be on another machine!).The memory itself can be moved around by the GDI functions, without your program...

C++

Windows

Bitmap

How to deserialise a C# 4 bitmap to a Silverlight 4 Bitmap Image

12 Aug 2011 by fasan21

HiThis seems to be quite a tricky one.I am uploading images into a database using C# 4.I serialize them, then convert them to byte[] so that they can be loaded into a "Image" type field.This works great.If I convert back from byte[] to string and save the image, it saves...

How to deserialise a C# 4 bitmap to a Silverlight 4 Bitmap Image

12 Aug 2011 by #realJSOP

To convert a byte array to a BitmapImage object:MemoryStream stream = new MemoryStream(bytearray);BitmapImage image = new BitmapImage();image.SetSource(stream);At this point, you can set your object's Source property to your new BitmapImage object.myImage.Source = image;

position of picture in C#

13 Sep 2011 by AmirAli1374

Bitmap ax = new Bitmap(300, 300); Rectangle rc = new Rectangle(0, 0, 300, 300); this.DrawToBitmap(ax, rc); pictureBox1.Image = ax;after running this code we have an image of part of form (from point(0,0) to point(300,300)) but i want an...

Bitmap

position of picture in C#

14 Sep 2011 by BobJanova

pictureBox1 must be a control on the form. Try moving the picture box to an origin of (300, 300).

Bitmap

find a point in vector file(.emf) without bitmap converting in C#.net

14 Sep 2011 by merkousha

hi,i worked on a project that in a step we must find a first character's position in a first line of a texts that we store it in a emf file .also we have a another problem that , some times our text line may have a Equation and this Equation may have a anormal height . this means that , the...

Bitmap

processing

Capture Hidden Webbrowser Control

21 Sep 2011 by Member 4160511

Hi everyone,is it possible too capture a Bitmap from a hidden WebbrowserControl?webBrowser1.DrawToBitmap(b, new Rectangle(0, 0, 600, 400)); doesn't work.This will only capture the control itself(scrollbars) not the children's so the content area is still white :-(any...

Bitmap

image

Capture Hidden Webbrowser Control

22 Sep 2011 by DaveAuld

Here's an example;http://www.geekpedia.com/code140_Taking-Website-Screenshots-With-The-WebBrowser-Control.html[^]

Bitmap

image

How to deserialise a C# 4 bitmap to a Silverlight 4 Bitmap Image

28 Sep 2011 by fasan21

I used normal deserializing in my webservice of my asp app.

how to save a bitmap image as monochromatic

5 Oct 2011 by genisyssoftware

In this code example: public void convertBmp(string imagepath){ Bitmap image = new Bitmap(imagepath); for (int y = 0; y

Bitmap

how to save a bitmap image as monochromatic

5 Oct 2011 by Sergey Alexandrovich Kryukov

Oh! First of all, forget about GetPixel/SetPixel and never recall it again. :-) The performance is not acceptable. Instead, use System.Drawing.Bitmap.LockBits. You will find a code sample here: http://msdn.microsoft.com/en-us/library/5ey6h79d.aspx[^].You will need two bitmaps as your target...

Bitmap

Getpixel returns 0 for any bitmap

20 Oct 2011 by difemen

Hi,sorry my braziliam english.im trying to do a little program that create a 2d array that returns 1 if have color or 0 if no but ever return 0. can anybody help me? i used a listbox to see the returnsBitmap newBitmap = new Bitmap(img.Width, img.Height); byte[,] buffer = new...

C#4.0

Bitmap

Getpixel returns 0 for any bitmap

20 Oct 2011 by André Kraak

The Bitmap[^] you are creating with Bitmap newBitmap = new Bitmap(img.Width, img.Height); has a default black background. So all the values in your 2D array will be 0.Before you start checking for colour you will need to place a colour picture in your bitmap.Notes:1 - Remove...

C#4.0

Bitmap

OPEN MP bitmap-matrix computation

21 Nov 2011 by Peter Kottas

Hello world! I am currently trying to develop a good way for bitmap-matrix , matrix - bitmap operation. I used lockbits on bitmap and things were pretty fast. But recently i learned about OPENMP and it got me thinking whether it is possible to use it on IO operation like this. When i tried "omp...

C++

Bitmap

OPEN MP bitmap-matrix computation

22 Nov 2011 by Peter Kottas

Thanks , you cleared it very good. I am new to unmanaged code to but it seem there is a little error in your fix ... just in case somebody reads this i believe it should be like. But the idea of increments and line pointers is brilliant thanks a lot.#pragma omp parallel for private(i)for...

C++

Bitmap

OPEN MP bitmap-matrix computation

22 Nov 2011 by Peter Kottas

thanks for the typecasting hint. about that dereferencing ... float * arrptr=mat[i]; for(int j=0;j

C++

Bitmap