source: vbox/trunk/src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/UgaDraw.h

/** @file
  UGA Draw protocol from the EFI 1.10 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 __UGA_DRAW_H__
#define __UGA_DRAW_H__

#define EFI_UGA_DRAW_PROTOCOL_GUID \
  { \
    0x982c298b, 0xf4fa, 0x41cb, {0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 } \
  }

typedef struct _EFI_UGA_DRAW_PROTOCOL EFI_UGA_DRAW_PROTOCOL;

/**
  Return the current video mode information.

  @param  This                  The EFI_UGA_DRAW_PROTOCOL instance.
  @param  HorizontalResolution  The size of video screen in pixels in the X dimension.
  @param  VerticalResolution    The size of video screen in pixels in the Y dimension.
  @param  ColorDepth            Number of bits per pixel, currently defined to be 32.
  @param  RefreshRate           The refresh rate of the monitor in Hertz.

  @retval EFI_SUCCESS           Mode information returned.
  @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_UGA_DRAW_PROTOCOL_GET_MODE)(
  IN  EFI_UGA_DRAW_PROTOCOL *This,
  OUT UINT32                *HorizontalResolution,
  OUT UINT32                *VerticalResolution,
  OUT UINT32                *ColorDepth,
  OUT UINT32                *RefreshRate
  );

/**
  Set the current video mode information.

  @param  This                 The EFI_UGA_DRAW_PROTOCOL instance.
  @param  HorizontalResolution The size of video screen in pixels in the X dimension.
  @param  VerticalResolution   The size of video screen in pixels in the Y dimension.
  @param  ColorDepth           Number of bits per pixel, currently defined to be 32.
  @param  RefreshRate          The refresh rate of the monitor in Hertz.

  @retval EFI_SUCCESS          Mode information returned.
  @retval EFI_NOT_STARTED      Video display is not initialized. Call SetMode ()

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UGA_DRAW_PROTOCOL_SET_MODE)(
  IN  EFI_UGA_DRAW_PROTOCOL *This,
  IN  UINT32                HorizontalResolution,
  IN  UINT32                VerticalResolution,
  IN  UINT32                ColorDepth,
  IN  UINT32                RefreshRate
  );

typedef struct {
  UINT8    Blue;
  UINT8    Green;
  UINT8    Red;
  UINT8    Reserved;
} EFI_UGA_PIXEL;

typedef union {
  EFI_UGA_PIXEL    Pixel;
  UINT32           Raw;
} EFI_UGA_PIXEL_UNION;

///
/// Enumration value for actions of Blt operations.
///
typedef enum {
  EfiUgaVideoFill,          ///< 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.

  EfiUgaVideoToBltBuffer,   ///< 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.

  EfiUgaBltBufferToVideo,   ///< 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.

  EfiUgaVideoToVideo,       ///< 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.

  EfiUgaBltMax              ///< Maxmimum value for enumration value of Blt operation. If a Blt operation
                            ///< larger or equal to this enumration value, it is invalid.
} EFI_UGA_BLT_OPERATION;

/**
    Blt a rectangle of pixels on the graphics screen.

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

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UGA_DRAW_PROTOCOL_BLT)(
  IN  EFI_UGA_DRAW_PROTOCOL                   *This,
  IN  EFI_UGA_PIXEL                           *BltBuffer  OPTIONAL,
  IN  EFI_UGA_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
  );

///
/// This protocol provides a basic abstraction to set video modes and
/// copy pixels to and from the graphics controller's frame buffer.
///
struct _EFI_UGA_DRAW_PROTOCOL {
  EFI_UGA_DRAW_PROTOCOL_GET_MODE    GetMode;
  EFI_UGA_DRAW_PROTOCOL_SET_MODE    SetMode;
  EFI_UGA_DRAW_PROTOCOL_BLT         Blt;
};

extern EFI_GUID  gEfiUgaDrawProtocolGuid;

#endif