/*++

Copyright (c) 2004, Intel Corporation                                                         
All rights reserved. This program and the accompanying materials                          
are licensed and made available under the terms and conditions of the BSD License         
which accompanies this distribution.  The full text of the license may be found at        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

Module Name:

  UgaDraw.h

Abstract:

  UGA Draw protocol from the EFI 1.1 specification.

  Abstraction of a very simple graphics device.

--*/

#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;

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
  )
/*++

  Routine Description:
    Return the current video mode information.

  Arguments:
    This                  - Protocol instance pointer.
    HorizontalResolution  - Current video horizontal resolution in pixels
    VerticalResolution    - Current video vertical resolution in pixels
    ColorDepth            - Current video color depth in bits per pixel
    RefreshRate           - Current video refresh rate in Hz.

  Returns:
    EFI_SUCCESS     - Mode information returned.
    EFI_NOT_STARTED - Video display is not initialized. Call SetMode () 
    EFI_INVALID_PARAMETER - One of the input args was NULL.

--*/
;

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
  )
/*++

  Routine Description:
    Return the current video mode information.

  Arguments:
    This                  - Protocol instance pointer.
    HorizontalResolution  - Current video horizontal resolution in pixels
    VerticalResolution    - Current video vertical resolution in pixels
    ColorDepth            - Current video color depth in bits per pixel
    RefreshRate           - Current video refresh rate in Hz.

  Returns:
    EFI_SUCCESS     - Mode information returned.
    EFI_NOT_STARTED - Video display is not initialized. Call SetMode () 

--*/
;

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;

typedef enum {
  EfiUgaVideoFill,
  EfiUgaVideoToBltBuffer,
  EfiUgaBltBufferToVideo,
  EfiUgaVideoToVideo,
  EfiUgaBltMax
} EFI_UGA_BLT_OPERATION;

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
  );

/*++

  Routine Description:
    The following table defines actions for BltOperations:
    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.

  Arguments:
    This          - Protocol instance pointer.
    BltBuffer     - Buffer containing data to blit into video buffer. This 
                    buffer has a size of Width*Height*sizeof(EFI_UGA_PIXEL)
    BltOperation  - Operation to perform on BlitBuffer and video memory
    SourceX       - X coordinate of source for the BltBuffer.
    SourceY       - Y coordinate of source for the BltBuffer.
    DestinationX  - X coordinate of destination for the BltBuffer.
    DestinationY  - Y coordinate of destination for the BltBuffer.
    Width         - Width of rectangle in BltBuffer in pixels.
    Height        - Hight of rectangle in BltBuffer in pixels.
    Delta         -
  
  Returns:
    EFI_SUCCESS           - The Blt operation completed.
    EFI_INVALID_PARAMETER - BltOperation is not valid.
    EFI_DEVICE_ERROR      - A hardware error occured writting to the video 
                             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
