GraphicsConsole

Function Table

Address	Name	Description
	ModuleEntryPoint
	GraphicsConsoleDriverEntry
	GopNotificationEvent
	TextOutConstructor
	TextOutDestructor
	TextOutResetGop
	TextOutReset
	TextOutOutputString
	TextOutTestString
	TextOutQueryMode
	TextOutSetMode
	TextOutSetAttribute
	FlushCursor
	EnableCursor
	SetCursorPosition
	ClearScreen
	GraphicsOutputFindMode
	InitializeGraphicsMode
	ScrollUp
	ScrollDown
	ScrollRow
	TextOutClearLine
	FlushCurrentLine
	TextOutSetModeCallback
	TextOutFlushStub
	TextOutFlush
	IsValidChar
Global	state variables for text output line buffer
UINT16	*gOutputBuffer = NULL;
cached	HII_FONT protocol pointer
cached	HII_FONT protocol handle
Standard	UEFI globals (set by ModuleEntryPoint)
EFI_HANDLE	gImageHandle = NULL;
EFI_HANDLE	gImageHandle_0 = NULL;
Standard	UEFI Module Entry Point
Driver	Entry Point
Create	GOP notification event (TPL_NOTIFY)
Status	= gBootServices_0->CreateEvent (
Install	protocol notification for SimpleTextOut on GOP
Status	= gBootServices_0->InstallProtocolInterface (
Install	driver binding + component name protocols
return	gBootServices_0->InstallMultipleProtocolInterfaces (
GOP	Notification Event Handler
Locate	all handles with GOP protocol
Status	= gBootServices_0->LocateHandleBuffer (
Match	GOP handle by comparing first 16 bytes of mode info
if	(CompareMem (GopModeInfo, &mGopModeInfoSource, 16) != 0) {
Cache	HII_FONT protocol
if	(gHiiFontInterface == NULL) {
Validate	HII font with notification buffer
AllocationSize	= (ModeEntry->ModeNumber & 0xFFFFFF) + 24;
TextOutConstructor	(Driver Binding Start)
Allocate	private context (266 bytes)
Status	= gBootServices_0->AllocatePool (
Copy	function table template (80 bytes at off_2990)
Allocate	and init SimpleTextOutMode (24 bytes)
Allocate	mode table (4 modes x 25 bytes = 100 bytes)
Open	GOP protocol BY_DRIVER
Status	= gBootServices_0->OpenProtocol (
Open	HII Font protocol BY_DRIVER (optional)
if	(EFI_ERROR (gBootServices_0->OpenProtocol (
Locate	HII Font on any handle
Initialize	graphics mode table
Status	= InitializeGraphicsMode (Private);
Initialize	private fields
Set	default mode 0 and clear screen
if	(TextOutSetMode (Private, 0) >= 0) {
Install	protocols on new handle
Status	= gBootServices_0->InstallMultipleProtocolInterfaces (
TextOutDestructor	(Driver Binding Stop)
Retrieve	private data from the protocol interface
Close	GOP protocol (opened BY_DRIVER)
Uninstall	protocols
Status	= gBootServices_0->UninstallMultipleProtocolInterfaces (
Free	resources
TextOutResetGop	- Reset GOP state for this instance
Locate	the controller handle via GOP protocol
Status	= gBootServices_0->LocateProtocol (
Reopen	GOP protocol
Convert	char to glyph via HII Font
Status	= Private->HiiFont->StringToImage (
Force	width to 8 for wide chars
if	*((((UINT16* )GlyphBuffer - 8) & 0xFFF7) != 0) {**
Accumulate	character in output buffer
CharPixelWidth	*= (UINT16* )GlyphBuffer >> 3;**
Free	glyph buffer
if	(GlyphBuffer != NULL) {
Flush	remaining buffered characters
FlushCurrentLine	(Private);
Set	GOP mode if needed
GopCurrentMode	= Private->Gop->Mode->Mode;
if	(gOutputBuffer != NULL) {
Internal	Helper Functions
Dump	mode table (debug output)
DEBUG	((EFI_D_INFO, " Mode# Text Col Text Row Vid Col Vid Row Supported GraphicsMode\n\r"));
Flush	cursor stub with width info
Blit	to GOP framebuffer
TPL	check

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