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/** @file
Graphics Output Protocol from the UEFI 2.0 specification.
Abstraction of a very simple graphics device.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __GRAPHICS_OUTPUT_H__
#define __GRAPHICS_OUTPUT_H__
#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
{ \
0x9042a9de, 0x23dc, 0x4a38, {0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a } \
}
typedef struct _EFI_GRAPHICS_OUTPUT_PROTOCOL EFI_GRAPHICS_OUTPUT_PROTOCOL;
typedef struct {
UINT32 RedMask;
UINT32 GreenMask;
UINT32 BlueMask;
UINT32 ReservedMask;
} EFI_PIXEL_BITMASK;
typedef enum {
///
/// A pixel is 32-bits and byte zero represents red, byte one represents green,
/// byte two represents blue, and byte three is reserved. This is the definition
/// for the physical frame buffer. The byte values for the red, green, and blue
/// components represent the color intensity. This color intensity value range
/// from a minimum intensity of 0 to maximum intensity of 255.
///
PixelRedGreenBlueReserved8BitPerColor,
///
/// A pixel is 32-bits and byte zero represents blue, byte one represents green,
/// byte two represents red, and byte three is reserved. This is the definition
/// for the physical frame buffer. The byte values for the red, green, and blue
/// components represent the color intensity. This color intensity value range
/// from a minimum intensity of 0 to maximum intensity of 255.
///
PixelBlueGreenRedReserved8BitPerColor,
///
/// The Pixel definition of the physical frame buffer.
///
PixelBitMask,
///
/// This mode does not support a physical frame buffer.
///
PixelBltOnly,
///
/// Valid EFI_GRAPHICS_PIXEL_FORMAT enum values are less than this value.
///
PixelFormatMax
} EFI_GRAPHICS_PIXEL_FORMAT;
typedef struct {
///
/// The version of this data structure. A value of zero represents the
/// EFI_GRAPHICS_OUTPUT_MODE_INFORMATION structure as defined in this specification.
///
UINT32 Version;
///
/// The size of video screen in pixels in the X dimension.
///
UINT32 HorizontalResolution;
///
/// The size of video screen in pixels in the Y dimension.
///
UINT32 VerticalResolution;
///
/// Enumeration that defines the physical format of the pixel. A value of PixelBltOnly
/// implies that a linear frame buffer is not available for this mode.
///
EFI_GRAPHICS_PIXEL_FORMAT PixelFormat;
///
/// This bit-mask is only valid if PixelFormat is set to PixelPixelBitMask.
/// A bit being set defines what bits are used for what purpose such as Red, Green, Blue, or Reserved.
///
EFI_PIXEL_BITMASK PixelInformation;
///
/// Defines the number of pixel elements per video memory line.
///
UINT32 PixelsPerScanLine;
} EFI_GRAPHICS_OUTPUT_MODE_INFORMATION;
/**
Returns information for an available graphics mode that the graphics device
and the set of active video output devices supports.
@param This The EFI_GRAPHICS_OUTPUT_PROTOCOL instance.
@param ModeNumber The mode number to return information on.
@param SizeOfInfo A pointer to the size, in bytes, of the Info buffer.
@param Info A pointer to callee allocated buffer that returns information about ModeNumber.
@retval EFI_SUCCESS Valid mode information was returned.
@retval EFI_DEVICE_ERROR A hardware error occurred trying to retrieve the video mode.
@retval EFI_INVALID_PARAMETER ModeNumber is not valid.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_GRAPHICS_OUTPUT_PROTOCOL_QUERY_MODE)(
IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
IN UINT32 ModeNumber,
OUT UINTN *SizeOfInfo,
OUT EFI_GRAPHICS_OUTPUT_MODE_INFORMATION **Info
);
/**
Set the video device into the specified mode and clears the visible portions of
the output display to black.
@param This The EFI_GRAPHICS_OUTPUT_PROTOCOL instance.
@param ModeNumber Abstraction that defines the current video mode.
@retval EFI_SUCCESS The graphics mode specified by ModeNumber was selected.
@retval EFI_DEVICE_ERROR The device had an error and could not complete the request.
@retval EFI_UNSUPPORTED ModeNumber is not supported by this device.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_GRAPHICS_OUTPUT_PROTOCOL_SET_MODE)(
IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
IN UINT32 ModeNumber
);
typedef struct {
UINT8 Blue;
UINT8 Green;
UINT8 Red;
UINT8 Reserved;
} EFI_GRAPHICS_OUTPUT_BLT_PIXEL;
typedef union {
EFI_GRAPHICS_OUTPUT_BLT_PIXEL Pixel;
UINT32 Raw;
} EFI_GRAPHICS_OUTPUT_BLT_PIXEL_UNION;
///
/// actions for BltOperations
///
typedef enum {
///
/// Write data from the BltBuffer pixel (0, 0)
/// directly to every pixel of the video display rectangle
/// (DestinationX, DestinationY) (DestinationX + Width, DestinationY + Height).
/// Only one pixel will be used from the BltBuffer. Delta is NOT used.
///
EfiBltVideoFill,
///
/// Read data from the video display rectangle
/// (SourceX, SourceY) (SourceX + Width, SourceY + Height) and place it in
/// the BltBuffer rectangle (DestinationX, DestinationY )
/// (DestinationX + Width, DestinationY + Height). If DestinationX or
/// DestinationY is not zero then Delta must be set to the length in bytes
/// of a row in the BltBuffer.
///
EfiBltVideoToBltBuffer,
///
/// Write data from the BltBuffer rectangle
/// (SourceX, SourceY) (SourceX + Width, SourceY + Height) directly to the
/// video display rectangle (DestinationX, DestinationY)
/// (DestinationX + Width, DestinationY + Height). If SourceX or SourceY is
/// not zero then Delta must be set to the length in bytes of a row in the
/// BltBuffer.
///
EfiBltBufferToVideo,
///
/// Copy from the video display rectangle (SourceX, SourceY)
/// (SourceX + Width, SourceY + Height) to the video display rectangle
/// (DestinationX, DestinationY) (DestinationX + Width, DestinationY + Height).
/// The BltBuffer and Delta are not used in this mode.
///
EfiBltVideoToVideo,
EfiGraphicsOutputBltOperationMax
} EFI_GRAPHICS_OUTPUT_BLT_OPERATION;
/**
Blt a rectangle of pixels on the graphics screen. Blt stands for BLock Transfer.
@param This Protocol instance pointer.
@param BltBuffer The data to transfer to the graphics screen.
Size is at least Width*Height*sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL).
@param BltOperation The operation to perform when copying BltBuffer on to the graphics screen.
@param SourceX The X coordinate of source for the BltOperation.
@param SourceY The Y coordinate of source for the BltOperation.
@param DestinationX The X coordinate of destination for the BltOperation.
@param DestinationY The Y coordinate of destination for the BltOperation.
@param Width The width of a rectangle in the blt rectangle in pixels.
@param Height The height of a rectangle in the blt rectangle in pixels.
@param Delta Not used for EfiBltVideoFill or the EfiBltVideoToVideo operation.
If a Delta of zero is used, the entire BltBuffer is being operated on.
If a subrectangle of the BltBuffer is being used then Delta
represents the number of bytes in a row of the BltBuffer.
@retval EFI_SUCCESS BltBuffer was drawn to the graphics screen.
@retval EFI_INVALID_PARAMETER BltOperation is not valid.
@retval EFI_DEVICE_ERROR The device had an error and could not complete the request.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_GRAPHICS_OUTPUT_PROTOCOL_BLT)(
IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,
IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer, OPTIONAL
IN EFI_GRAPHICS_OUTPUT_BLT_OPERATION BltOperation,
IN UINTN SourceX,
IN UINTN SourceY,
IN UINTN DestinationX,
IN UINTN DestinationY,
IN UINTN Width,
IN UINTN Height,
IN UINTN Delta OPTIONAL
);
typedef struct {
///
/// The number of modes supported by QueryMode() and SetMode().
///
UINT32 MaxMode;
///
/// Current Mode of the graphics device. Valid mode numbers are 0 to MaxMode -1.
///
UINT32 Mode;
///
/// Pointer to read-only EFI_GRAPHICS_OUTPUT_MODE_INFORMATION data.
///
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *Info;
///
/// Size of Info structure in bytes.
///
UINTN SizeOfInfo;
///
/// Base address of graphics linear frame buffer.
/// Offset zero in FrameBufferBase represents the upper left pixel of the display.
///
EFI_PHYSICAL_ADDRESS FrameBufferBase;
///
/// Amount of frame buffer needed to support the active mode as defined by
/// PixelsPerScanLine xVerticalResolution x PixelElementSize.
///
UINTN FrameBufferSize;
} EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE;
///
/// Provides a basic abstraction to set video modes and copy pixels to and from
/// the graphics controller's frame buffer. The linear address of the hardware
/// frame buffer is also exposed so software can write directly to the video hardware.
///
struct _EFI_GRAPHICS_OUTPUT_PROTOCOL {
EFI_GRAPHICS_OUTPUT_PROTOCOL_QUERY_MODE QueryMode;
EFI_GRAPHICS_OUTPUT_PROTOCOL_SET_MODE SetMode;
EFI_GRAPHICS_OUTPUT_PROTOCOL_BLT Blt;
///
/// Pointer to EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE data.
///
EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *Mode;
};
extern EFI_GUID gEfiGraphicsOutputProtocolGuid;
#endif
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