graphics.c

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/*++

Copyright (c) 2004 - 2006, 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:

  Graphics.c

Abstract:

  Support for Basic Graphics operations.

  BugBug: Currently *.BMP files are supported. This will be replaced
          when Tiano graphics format is supported.

--*/

#include "Tiano.h"
#include "EfiDriverLib.h"
#include "GraphicsLib.h"


EFI_STATUS
GetGraphicsBitMapFromFV (
  IN  EFI_GUID      *FileNameGuid,
  OUT VOID          **Image,
  OUT UINTN         *ImageSize
  )
/*++

Routine Description:

  Return the graphics image file named FileNameGuid into Image and return it's
  size in ImageSize. All Firmware Volumes (FV) in the system are searched for the
  file name.

Arguments:

  FileNameGuid  - File Name of graphics file in the FV(s).

  Image         - Pointer to pointer to return graphics image.  If NULL, a 
                  buffer will be allocated.

  ImageSize     - Size of the graphics Image in bytes. Zero if no image found.


Returns: 

  EFI_SUCCESS          - Image and ImageSize are valid. 
  EFI_BUFFER_TOO_SMALL - Image not big enough. ImageSize has required size
  EFI_NOT_FOUND        - FileNameGuid not found

--*/
{
  EFI_STATUS                    Status;
  UINTN                         FvProtocolCount;
  EFI_HANDLE                    *FvHandles;
  EFI_FIRMWARE_VOLUME_PROTOCOL  *Fv;
  UINTN                         Index;
  UINT32                        AuthenticationStatus;

  Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiFirmwareVolumeProtocolGuid,
                  NULL,
                  &FvProtocolCount,
                  &FvHandles
                  );
  if (EFI_ERROR (Status)) {
    return EFI_NOT_FOUND;
  }

  for (Index = 0; Index < FvProtocolCount; Index++) {
    Status = gBS->HandleProtocol (
                    FvHandles[Index],
                    &gEfiFirmwareVolumeProtocolGuid,
                    (VOID **) &Fv
                    );

    //
    // Assuming Image and ImageSize are correct on input.
    //
    Status = Fv->ReadSection (
                  Fv,
                  &gEfiDefaultBmpLogoGuid,
                  EFI_SECTION_RAW,
                  0,
                  Image,
                  ImageSize,
                  &AuthenticationStatus
                  );
    if (!EFI_ERROR (Status)) {
      return EFI_SUCCESS;
    } else if (Status == EFI_BUFFER_TOO_SMALL) {
      //
      // ImageSize updated to needed size so return
      //
      return EFI_BUFFER_TOO_SMALL;
    }
  }

  return EFI_NOT_FOUND;
}


EFI_STATUS
ConvertBmpToGopBlt (
  IN  VOID      *BmpImage,
  IN  UINTN     BmpImageSize,
  IN OUT VOID   **GopBlt,
  IN OUT UINTN  *GopBltSize,
  OUT UINTN     *PixelHeight,
  OUT UINTN     *PixelWidth
  )
/*++

Routine Description:

  Convert a *.BMP graphics image to a GOP/UGA blt buffer. If a NULL Blt buffer
  is passed in a GopBlt buffer will be allocated by this routine. If a GopBlt
  buffer is passed in it will be used if it is big enough.

Arguments:

  BmpImage      - Pointer to BMP file

  BmpImageSize  - Number of bytes in BmpImage

  GopBlt        - Buffer containing GOP version of BmpImage.

  GopBltSize    - Size of GopBlt in bytes.

  PixelHeight   - Height of GopBlt/BmpImage in pixels

  PixelWidth    - Width of GopBlt/BmpImage in pixels


Returns: 

  EFI_SUCCESS           - GopBlt and GopBltSize are returned. 
  EFI_UNSUPPORTED       - BmpImage is not a valid *.BMP image
  EFI_BUFFER_TOO_SMALL  - The passed in GopBlt buffer is not big enough.
                          GopBltSize will contain the required size.
  EFI_OUT_OF_RESOURCES  - No enough buffer to allocate

--*/
{
  UINT8                         *Image;
  UINT8                         *ImageHeader;
  BMP_IMAGE_HEADER              *BmpHeader;
  BMP_COLOR_MAP                 *BmpColorMap;
  EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer;
  EFI_GRAPHICS_OUTPUT_BLT_PIXEL *Blt;
  UINTN                         BltBufferSize;
  UINTN                         Index;
  UINTN                         Height;
  UINTN                         Width;
  UINTN                         ImageIndex;
  BOOLEAN                       IsAllocated;

  BmpHeader = (BMP_IMAGE_HEADER *) BmpImage;
  if (BmpHeader->CharB != 'B' || BmpHeader->CharM != 'M') {
    return EFI_UNSUPPORTED;
  }

  if (BmpHeader->CompressionType != 0) {
    return EFI_UNSUPPORTED;
  }

  //
  // Calculate Color Map offset in the image.
  //
  Image       = BmpImage;
  BmpColorMap = (BMP_COLOR_MAP *) (Image + sizeof (BMP_IMAGE_HEADER));

  //
  // Calculate graphics image data address in the image
  //
  Image         = ((UINT8 *) BmpImage) + BmpHeader->ImageOffset;
  ImageHeader   = Image;

  BltBufferSize = BmpHeader->PixelWidth * BmpHeader->PixelHeight * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
  IsAllocated   = FALSE;
  if (*GopBlt == NULL) {
    *GopBltSize = BltBufferSize;
    *GopBlt     = EfiLibAllocatePool (*GopBltSize);
    IsAllocated = TRUE;
    if (*GopBlt == NULL) {
      return EFI_OUT_OF_RESOURCES;
    }
  } else {
    if (*GopBltSize < BltBufferSize) {
      *GopBltSize = BltBufferSize;
      return EFI_BUFFER_TOO_SMALL;
    }
  }

  *PixelWidth   = BmpHeader->PixelWidth;
  *PixelHeight  = BmpHeader->PixelHeight;

  //
  // Convert image from BMP to Blt buffer format
  //
  BltBuffer = *GopBlt;
  for (Height = 0; Height < BmpHeader->PixelHeight; Height++) {
    Blt = &BltBuffer[(BmpHeader->PixelHeight - Height - 1) * BmpHeader->PixelWidth];
    for (Width = 0; Width < BmpHeader->PixelWidth; Width++, Image++, Blt++) {
      switch (BmpHeader->BitPerPixel) {
      case 1:
        //
        // Convert 1bit BMP to 24-bit color
        //
        for (Index = 0; Index < 8 && Width < BmpHeader->PixelWidth; Index++) {
          Blt->Red    = BmpColorMap[((*Image) >> (7 - Index)) & 0x1].Red;
          Blt->Green  = BmpColorMap[((*Image) >> (7 - Index)) & 0x1].Green;
          Blt->Blue   = BmpColorMap[((*Image) >> (7 - Index)) & 0x1].Blue;
          Blt++;
          Width++;
        }

        Blt --;
        Width --;
        break;

      case 4:
        //
        // Convert BMP Palette to 24-bit color
        //
        Index       = (*Image) >> 4;
        Blt->Red    = BmpColorMap[Index].Red;
        Blt->Green  = BmpColorMap[Index].Green;
        Blt->Blue   = BmpColorMap[Index].Blue;
        if (Width < (BmpHeader->PixelWidth - 1)) {
          Blt++;
          Width++;
          Index       = (*Image) & 0x0f;
          Blt->Red    = BmpColorMap[Index].Red;
          Blt->Green  = BmpColorMap[Index].Green;
          Blt->Blue   = BmpColorMap[Index].Blue;
        }
        break;

      case 8:
        //
        // Convert BMP Palette to 24-bit color
        //
        Blt->Red    = BmpColorMap[*Image].Red;
        Blt->Green  = BmpColorMap[*Image].Green;
        Blt->Blue   = BmpColorMap[*Image].Blue;
        break;

      case 24:
        Blt->Blue   = *Image++;
        Blt->Green  = *Image++;
        Blt->Red    = *Image;
        break;

      default:
        if (IsAllocated) {
          gBS->FreePool (*GopBlt);
          *GopBlt = NULL;
        }
        return EFI_UNSUPPORTED;
        break;
      };

    }

    ImageIndex = (UINTN) (Image - ImageHeader);
    if ((ImageIndex % 4) != 0) {
      //
      // Bmp Image starts each row on a 32-bit boundary!
      //
      Image = Image + (4 - (ImageIndex % 4));
    }
  }

  return EFI_SUCCESS;
}


EFI_STATUS
LockKeyboards (
  IN  CHAR16    *Password
  )
/*++

Routine Description:
  Use Console Control Protocol to lock the Console In Spliter virtual handle.