/** @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 {
  PixelRedGreenBlueReserved8BitPerColor,
  PixelBlueGreenRedReserved8BitPerColor,
  PixelBitMask,
  PixelBltOnly,
  PixelFormatMax
} EFI_GRAPHICS_PIXEL_FORMAT;

typedef struct {
  UINT32                     Version;
  UINT32                     HorizontalResolution;
  UINT32                     VerticalResolution;
  EFI_GRAPHICS_PIXEL_FORMAT  PixelFormat;
  EFI_PIXEL_BITMASK          PixelInformation;
  UINT32                     PixelsPerScanLine;
} EFI_GRAPHICS_OUTPUT_MODE_INFORMATION;

/**
  Return the current video mode information.

  @param  This       Protocol instance pointer.
  @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           Mode information returned.
  @retval EFI_BUFFER_TOO_SMALL  The Info buffer was too small.
  @retval EFI_DEVICE_ERROR      A hardware error occurred trying to retrieve the video mode.
  @retval EFI_NOT_STARTED       Video display is not initialized. Call SetMode ()
  @retval EFI_INVALID_PARAMETER One of the input args was NULL.

**/
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
  )
;

/**
  Return the current video mode information.

  @param  This              Protocol instance pointer.
  @param  ModeNumber        The mode number to be set.

  @retval EFI_SUCCESS       Graphics mode was changed.
  @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;

typedef enum {
  EfiBltVideoFill,
  EfiBltVideoToBltBuffer,
  EfiBltBufferToVideo,
  EfiBltVideoToVideo,
  EfiGraphicsOutputBltOperationMax
} EFI_GRAPHICS_OUTPUT_BLT_OPERATION;

/**
  The following table defines actions for BltOperations:

  <B>EfiBltVideoFill</B> - Write data from the  BltBuffer pixel (SourceX, SourceY)
  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.

  <B>EfiBltVideoToBltBuffer</B> - 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.

  <B>EfiBltBufferToVideo</B> - 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.

  <B>EfiBltVideoToVideo</B> - 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.

  @param  This         Protocol instance pointer.
  @param  BltBuffer    Buffer containing data to blit into video buffer. This
                       buffer has a size of Width*Height*sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL)
  @param  BltOperation Operation to perform on BlitBuffer and video memory
  @param  SourceX      X coordinate of source for the BltBuffer.
  @param  SourceY      Y coordinate of source for the BltBuffer.
  @param  DestinationX X coordinate of destination for the BltBuffer.
  @param  DestinationY Y coordinate of destination for the BltBuffer.
  @param  Width        Width of rectangle in BltBuffer in pixels.
  @param  Height       Height of rectangle in BltBuffer in pixels.
  @param  Delta        OPTIONAL

  @retval EFI_SUCCESS           The Blt operation completed.
  @retval EFI_INVALID_PARAMETER BltOperation is not valid.
  @retval EFI_DEVICE_ERROR      A hardware error occurred writing to the video buffer.

**/
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 {
  UINT32                                 MaxMode;
  UINT32                                 Mode;
  EFI_GRAPHICS_OUTPUT_MODE_INFORMATION   *Info;
  UINTN                                  SizeOfInfo;
  EFI_PHYSICAL_ADDRESS                   FrameBufferBase;
  UINTN                                  FrameBufferSize;
} EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE;

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;
  EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE        *Mode;
};

extern EFI_GUID gEfiGraphicsOutputProtocolGuid;

#endif
