lightconsplittergraphics.c

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  VerticalResolution    = Private->GraphicsOutput.Mode->Info->VerticalResolution;

  //
  // We need to fill the Virtual Screen buffer with the blt data.
  //
  if (BltOperation == EfiBltVideoToBltBuffer) {
    //
    // Video to BltBuffer: Source is Video, destination is BltBuffer
    //
    if ((SourceY + Height) > VerticalResolution) {
      return EFI_INVALID_PARAMETER;
    }

    if ((SourceX + Width) > HorizontalResolution) {
      return EFI_INVALID_PARAMETER;
    }

    BltPtr    = (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *) ((UINT8 *) BltBuffer + DestinationY * Delta + DestinationX * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
    ScreenPtr = &Private->GraphicsOutputBlt[SourceY * HorizontalResolution + SourceX];
    while (Height) {
      EfiCopyMem (BltPtr, ScreenPtr, Width * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
      BltPtr = (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *) ((UINT8 *) BltPtr + Delta);
      ScreenPtr += HorizontalResolution;
      Height--;
    }
  } else {
    //
    // BltBuffer to Video: Source is BltBuffer, destination is Video
    //
    if (DestinationY + Height > VerticalResolution) {
      return EFI_INVALID_PARAMETER;
    }

    if (DestinationX + Width > HorizontalResolution) {
      return EFI_INVALID_PARAMETER;
    }

    ScreenPtr = &Private->GraphicsOutputBlt[DestinationY * HorizontalResolution + DestinationX];
    SrcY      = SourceY;
    while (Height) {
      if (BltOperation == EfiBltVideoFill) {
        for (Index = 0; Index < Width; Index++) {
          ScreenPtr[Index] = *BltBuffer;
        }
      } else {
        if (BltOperation == EfiBltBufferToVideo) {
          BltPtr = (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *) ((UINT8 *) BltBuffer + SrcY * Delta + SourceX * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
        } else {
          BltPtr = &Private->GraphicsOutputBlt[SrcY * HorizontalResolution + SourceX];
        }

        EfiCopyMem (ScreenPtr, BltPtr, Width * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
      }

      ScreenPtr += HorizontalResolution;
      SrcY++;
      Height--;
    }
  }

  return EFI_SUCCESS;
}

EFI_STATUS
EFIAPI
ConSpliterGraphicsOutputBlt (
  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
  )
/*++

  Routine Description:
    The following table defines actions for BltOperations:
    EfiBltVideoFill - 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.
    EfiBltVideoToBltBuffer - 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.
    EfiBltBufferToVideo - 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.
    EfiBltVideoToVideo - 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_GRAPHICS_OUTPUT_BLT_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.

--*/
{
  EFI_STATUS                      Status;
  TEXT_OUT_SPLITTER_PRIVATE_DATA  *Private;
  UINTN                           Index;
  EFI_STATUS                      ReturnStatus;
  EFI_GRAPHICS_OUTPUT_PROTOCOL    *GraphicsOutput;
  EFI_UGA_DRAW_PROTOCOL           *UgaDraw;

  Private = GRAPHICS_OUTPUT_SPLITTER_PRIVATE_DATA_FROM_THIS (This);

  //
  // Sync up DevNull GOP device
  //
  ReturnStatus = DevNullGraphicsOutputBlt (
                  Private,
                  BltBuffer,
                  BltOperation,
                  SourceX,
                  SourceY,
                  DestinationX,
                  DestinationY,
                  Width,
                  Height,
                  Delta
                  );

  if (Private->ConsoleOutputMode != EfiConsoleControlScreenGraphics) {
    return ReturnStatus;
  }
  //
  // return the worst status met
  //
  for (Index = 0; Index < Private->CurrentNumberOfConsoles; Index++) {
    GraphicsOutput = Private->TextOutList[Index].GraphicsOutput;
    if (GraphicsOutput != NULL) {
      Status = GraphicsOutput->Blt (
                              GraphicsOutput,
                              BltBuffer,
                              BltOperation,
                              SourceX,
                              SourceY,
                              DestinationX,
                              DestinationY,
                              Width,
                              Height,
                              Delta
                              );
      if (EFI_ERROR (Status)) {
        ReturnStatus = Status;
      } else if (BltOperation == EfiBltVideoToBltBuffer) {
        //
        // Only need to read the data into buffer one time
        //
        return EFI_SUCCESS;
      }
    }

    UgaDraw = Private->TextOutList[Index].UgaDraw;
    if (UgaDraw != NULL) {
      Status = UgaDraw->Blt (
                              UgaDraw,
                              (EFI_UGA_PIXEL *) BltBuffer,
                              BltOperation,
                              SourceX,
                              SourceY,
                              DestinationX,
                              DestinationY,
                              Width,
                              Height,
                              Delta
                              );
      if (EFI_ERROR (Status)) {
        ReturnStatus = Status;
      } else if (BltOperation == EfiBltVideoToBltBuffer) {
        //
        // Only need to read the data into buffer one time
        //
        return EFI_SUCCESS;
      }
    }
  }

  return ReturnStatus;
}

EFI_STATUS
DevNullGopSync (
  IN  TEXT_OUT_SPLITTER_PRIVATE_DATA  *Private,
  IN  EFI_GRAPHICS_OUTPUT_PROTOCOL    *GraphicsOutput,
  IN  EFI_UGA_DRAW_PROTOCOL           *UgaDraw
  )
{
  if (GraphicsOutput != NULL) {
    return GraphicsOutput->Blt (
                      GraphicsOutput,
                      Private->GraphicsOutputBlt,
                      EfiBltBufferToVideo,
                      0,
                      0,
                      0,
                      0,
                      Private->GraphicsOutput.Mode->Info->HorizontalResolution,
                      Private->GraphicsOutput.Mode->Info->VerticalResolution,
                      0
                      );
  } else {
    return UgaDraw->Blt (
                      UgaDraw,
                      (EFI_UGA_PIXEL *) Private->GraphicsOutputBlt,
                      EfiUgaBltBufferToVideo,
                      0,
                      0,
                      0,
                      0,
                      Private->GraphicsOutput.Mode->Info->HorizontalResolution,
                      Private->GraphicsOutput.Mode->Info->VerticalResolution,
                      0
                      );
  }
}

#else

EFI_STATUS
EFIAPI
ConSpliterUgaDrawGetMode (
  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.

--*/
{
  TEXT_OUT_SPLITTER_PRIVATE_DATA  *Private;

  if (!(HorizontalResolution && VerticalResolution && RefreshRate && ColorDepth)) {
    return EFI_INVALID_PARAMETER;
  }
  //
  // retrieve private data
  //
  Private               = UGA_DRAW_SPLITTER_PRIVATE_DATA_FROM_THIS (This);

  *HorizontalResolution = Private->UgaHorizontalResolution;
  *VerticalResolution   = Private->UgaVerticalResolution;
  *ColorDepth           = Private->UgaColorDepth;
  *RefreshRate          = Private->UgaRefreshRate;

  return EFI_SUCCESS;
}

EFI_STATUS
EFIAPI
ConSpliterUgaDrawSetMode (
  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 () 
    EFI_OUT_OF_RESOURCES - Out of resources.

--*/
{
  EFI_STATUS                      Status;
  TEXT_OUT_SPLITTER_PRIVATE_DATA  *Private;
  UINTN                           Index;
  EFI_STATUS                      ReturnStatus;
  UINTN                           Size;

  Private = UGA_DRAW_SPLITTER_PRIVATE_DATA_FROM_THIS (This);

  //
  // UgaDevNullSetMode ()
  //
  ReturnStatus = EFI_SUCCESS;

  //
  // Free the old version
  //
  gBS->FreePool (Private->UgaBlt);

  //
  // Allocate the virtual Blt buffer
  //
  Size            = HorizontalResolution * VerticalResolution * sizeof (EFI_UGA_PIXEL);
  Private->UgaBlt = EfiLibAllocateZeroPool (Size);
  if (Private->UgaBlt == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }

  //
  // Update the Mode data
  //
  Private->UgaHorizontalResolution  = HorizontalResolution;
  Private->UgaVerticalResolution    = VerticalResolution;
  Private->UgaColorDepth            = ColorDepth;
  Private->UgaRefreshRate           = RefreshRate;

  if (Private->ConsoleOutputMode != EfiConsoleControlScreenGraphics) {
    return ReturnStatus;
  }
  //
  // return the worst status met
  //
  for (Index = 0; Index < Private->CurrentNumberOfConsoles; Index++) {
    if (Private->TextOutList[Index].UgaDraw != NULL) {
      Status = Private->TextOutList[Index].UgaDraw->SetMode (
                                                      Private->TextOutList[Index].UgaDraw,
                                                      HorizontalResolution,
                                                      VerticalResolution,
                                                      ColorDepth,
                                                      RefreshRate
                                                      );
      if (EFI_ERROR (Status)) {
        ReturnStatus = Status;
      }
    }
  }

  return ReturnStatus;
}

EFI_STATUS
DevNullUgaBlt (
  IN  TEXT_OUT_SPLITTER_PRIVATE_DATA                *Private,
  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,