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Questions tagged [bitblt]

BitBlt WinAPI function performs a bit-block transfer of the color data corresponding to a rectangle of pixels from the specified source device context into a destination device context.

BitBlt is a Windows API function, which performs a bit-block transfer of the color data corresponding to a rectangle of pixels from the specified source device context into a destination device context.

A raster operation code is also passed to the BitBlt function, which affects how the source DC and destination DC are merged together. For example, bits can be ANDed, ORed, XORed, etc.. together for different effects.

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WinApi: Displaying HBITMAP on the screen

I created a simple render function as a test. I call this function with FPS 60. I'm testing 2 pictures in total. Each time the function is called, I draw one picture. With each new call, the picture changes. The idea is that due to the high…
Alex
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Draw BITMAP over Window Handle (HWND) of another process

I have bitblt a screenshot of the entire screen, and its indeed a valid BITMAP since after writing it to a file, I can clearly see its there. Lets say I have the window handle of Calculator. I want to be able to constantly BitBlt the BITMAP…
curiousgeorge8954
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writing directly to form's byte array with pointer

In a winforms application is there any way to draw directly to the pixel buffer/byte array for the window? I have a bytearray with an image in the format byte[] myimg = new byte[width x height x 4] for an ARGB bitmap, now i want to display it in the…
Lasse
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BufferOverflow error while capturing using BitBlt and encoding through GDI+

Windows GDI ImageCapturing application consumes more GDI objects(Around 320 TaskManager) Single Monitor and Encoding using GDI+ image returns User/ Kernal Marshalling Buffer has been overflowed ​ERROR_MARSHALL_OVERFLOW Marshalling Buffer…
Dhivakar
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Flip Bitmap in C

Is there any way to flip a Bitmap with function like BitBlt or StretchBlt. I'am getting really confused by the Cooridnates. Currenty i've tried some variation of this: BitBlt(hdc,0,bmp.bmHeight,bmp.bmWidth,0,hdc,0,0,SRCCOPY); Is it even possable…
Tomke
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How do I draw an array made bitmap on screen using bitblt?

Instead of drawing using Moveto and LineTo, I want to use a hand made bitmap, that I will fill with an array that I will create myself, and use that to fill the screen. Right now, the array is just filled with red, But when I draw to the screen I…
Shasi
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Why the Bitblt cannot work

> case WM_PAINT: { > hdc = BeginPaint(hWnd, &ps); > // TODO: Add any drawing code here... > RECT rt; > GetClientRect(hWnd, &rt); > HDC myHdc =…
Jianzhong
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Why is the screenshot not drawn onto my window using SelectObject and BitBlt functions?

I am trying to get a 500x500 screenshot from the 0x0 (top-left) position of screen and put it in a window. Here is my code (hwnd is my Window Handle): HDC appDc = GetDC(hwnd); HDC dc = GetDC(NULL); HBITMAP bitmap = CreateCompatibleBitmap(dc, 500,…
Neel Basu
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C# Bitblt screenshot not working on all systems

I am trying to take a screenshot of a DirectX game. I want to capture the window even when it is behind other windows without bringing the window to the front. When I run the application on my system, it works perfectly. However, on all other…
Deltin
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BitBlt and ElementHost not working on some machines

This is a weird problem. I'm using BitBlt to copy from the device context associated with my (WinForms) window handle to a bitmap, and it works (or so I thought). But there's one machine where the WPF elements inside ElementHost just don't show up…
Benjol
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Which Windows API capturing screen faster than Bitblt or any other Mirror Drivers?

am using bitblt API to capture window screen it taking approximately 30 to 40 Milliseconds but i want to make this in more faster way so is any other inbuilt API or suggest me best screen capture drivers. Here is my code. ret =…
Krish
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Image sent over TCP is flipped

I created an client which sends a screenshot over TCP to an server.The image is sent successfully. However at receival the image is upside down(I know this is set by the negative height in one of the structure's properties). I've searched over the…
Reznicencu Bogdan
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Using BitBlt to capture desktop pixel colors

Right now I'm using GetPixel() to retrieve about 64 pixels from the desktop in order to obtain their color. I read about GetPixel() being slow but didn't think it would matter for a few pixels but it's taking like 1.5 seconds each time I run the…
user498982
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Screenshot with BitBlt results in black image on Windows 10

I am using the code below to capture a screenshot of the currently active window. This code comes from Capture screenshot Including Semitransparent windows in .NET, with a few small additions, i.e. it uses GetForegroundWindow and also a timer so…
RaelB
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WTL ScrollWindow efficient painting

With a class derived from CScrollWindowImpl void Scroll::DoPaint(CDCHandle hDC) { if ( _MemDC==NULL) return; RECT r; //I'd like to update r with rcPaint from the DC's PAINTSTRUCT here hDC.BitBlt(r.left,…
Jan S
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