GraphicsConsole

Overview

GraphicsConsole is a UEFI DXE driver that implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL on top of EFI_GRAPHICS_OUTPUT_PROTOCOL. It provides a text rendering pipeline that accumulates characters in an output buffer, flushes lines on newline or wrap events using the HII_FONT protocol's StringToImage service, and outputs via GOP Bit Block Transfer (Blt). The driver manages text mode settings, cursor positioning, and character attribute rendering in a graphical framebuffer environment.

Key Functions

• ModuleEntryPoint() -- Standard UEFI module entry point
• TextOutOutputString() -- Outputs a string to the graphical console
• TextOutSetModeCallback() -- Sets the text output mode (resolution / columns x rows)
• FlushCurrentLine() -- Flushes buffered text to the framebuffer via GOP Blt
• TextOutReset() -- Resets the text output device
• TextOutSetAttribute() -- Sets text foreground/background color attributes
• TextOutClearScreen() -- Clears the graphical console screen
• TextOutEnableCursor() -- Enables or disables the cursor
• TextOutSetCursorPosition() -- Positions the text cursor

Dependencies

• EFI_GRAPHICS_OUTPUT_PROTOCOL (GOP) -- Pixel-level framebuffer access
• EFI_HII_FONT_PROTOCOL -- Font rendering and StringToImage service
• EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL -- Output protocol produced by this driver

Platform

• Architecture: x86-64 (PE32+)
• PDB: GraphicsConsole.pdb
• Subsystem: EFI_BOOT_SERVICE_DRIVER (0x0B)
• Source: MdeModulePkg (Intel)
• BIOS: HR650X (HR6N0XMLK)