This is an example application using win32 and Node.js to clone bitmaps from native window windows.

Example Usage

// Import the library index file
const { BitmapTextScanner } = require('./dist/index');
// Call the PreviewBitmap function and provide the window title
const res = BitmapTextScanner.PreviewBitmap(your window title);

1. The function PreviewBitmap is called and is provided the window title.
2. The call is delegated to the nan PreviewBitmap function written in C++ acting as the glue between the Node.js enviroment and the img-get.cc file.
3. The underlying const char* (a c styled string) is retreived from the js object in the C++ space and passed to PreviewBitmapInternal() containing pure C++ and win32.
4. A bunch of intermediate steps to clone the bitmap from the window take place; checkout file here to see for yourself.
5. The result from PreviewBitmapInternal() is received and converted into javascript v8 engine objects and returned.

Setup

1. Recommended installation of Node.js 18 or later
2. Follow vcpkg's simple installation here
3. Inside the vcpkg root dir, run vcpkg install plog in the cmdline
4. Clone the repository
5. Run npm run init:all to setup dependencies and configuration
6. Run npm run build:node to build the project

Note: Visual Studios C++ Desktop Toolkit is required.

Example Uses

Notpad

A Video Game in Unreal Engine 4

FireFox

Auto Hotkey Spy Program

I recommend getting this little tool if you need to plug information easily about various windows. Download here.

Note: Some windows like Google Chrome do not work and present a completely black bitmap.