DiscordOverlay.Helpers is a proof of concept C# library designed to demonstrate how to use Discord's overlay for drawing custom graphics. It utilizes SkiaSharp for graphics rendering and system-level functions for memory manipulation.

• Direct Memory Management: Leverages kernel32.dll for memory operations within Discord's process.
• Graphics Rendering: Utilizes SkiaSharp for high-quality 2D graphics.
• Overlay Management: Controls the overlay in Discord, with capabilities for various graphical operations.

• The library interacts with Discord's process memory using Memory class methods like OpenFileMapping and MapViewOfFile.
• These methods access and map Discord's memory, enabling the overlay to be drawn within its graphical interface.

• SkiaSharp is used for drawing graphics onto the overlay.
• The Drawing class offers methods such as DrawLine, DrawRectangle, DrawString, and DrawCircle.

• Frame Management: GraphicsPipe manages the connection to Discord, handling the shared memory for frame data.
• Frame Representation: The Frame class represents each graphics frame, storing dimensions and pixel data.
• Buffer Writing Process:
  • The graphics drawn using SkiaSharp are rendered onto a frame buffer (Frame.Buffer).
  • This buffer is a byte array representing pixel data for the entire frame.
  • The GraphicsPipe.SendFrame method is used to send this frame to the shared memory.
  • It involves copying the frame buffer to the shared memory location mapped to Discord's process.
  • The header (GraphicsPipe.Header) is updated with the new frame's dimensions and frame count.
  • This process ensures that each new frame is accurately rendered in the overlay.