/** @file
  OcBlitLib - Library to perform blt operations on a frame buffer.

  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
  Copyright (c) 2021, vit9696. All rights reserved.<BR>

  SPDX-License-Identifier: BSD-2-Clause-Patent
**/

#include "BlitInternal.h"

#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>

RETURN_STATUS
BlitLibBufferToVideo0 (
  IN  OC_BLIT_CONFIGURE              *Configure,
  IN  EFI_GRAPHICS_OUTPUT_BLT_PIXEL  *BltBuffer,
  IN  UINTN                          SourceX,
  IN  UINTN                          SourceY,
  IN  UINTN                          DestinationX,
  IN  UINTN                          DestinationY,
  IN  UINTN                          Width,
  IN  UINTN                          Height,
  IN  UINTN                          DeltaPixels
  )
{
  UINT32  *Source;
  UINT32  *Destination;
  UINT32  *SourceWalker;
  UINT32  *DestinationWalker;
  UINTN   IndexX;
  UINTN   WidthInBytes;
  UINTN   PixelsPerScanLine;
  UINT32  Uint32;

  WidthInBytes      = Width * BYTES_PER_PIXEL;
  PixelsPerScanLine = Configure->PixelsPerScanLine;

  Destination = (UINT32 *)Configure->FrameBuffer
                + DestinationY * PixelsPerScanLine + DestinationX;
  Source = (UINT32 *)BltBuffer
           + SourceY * DeltaPixels + SourceX;
  if (Configure->PixelFormat == PixelBlueGreenRedReserved8BitPerColor) {
    while (Height > 0) {
      CopyMem (Destination, Source, WidthInBytes);
      Source      += DeltaPixels;
      Destination += PixelsPerScanLine;
      Height--;
    }
  } else {
    while (Height > 0) {
      DestinationWalker = (UINT32 *)Configure->LineBuffer;
      SourceWalker      = (UINT32 *)Source;
      for (IndexX = 0; IndexX < Width; IndexX++) {
        Uint32               = *SourceWalker++;
        *DestinationWalker++ =
          (UINT32)(
                   (((Uint32 << Configure->PixelShl[0]) >> Configure->PixelShr[0]) &
                    Configure->PixelMasks.RedMask) |
                   (((Uint32 << Configure->PixelShl[1]) >> Configure->PixelShr[1]) &
                    Configure->PixelMasks.GreenMask) |
                   (((Uint32 << Configure->PixelShl[2]) >> Configure->PixelShr[2]) &
                    Configure->PixelMasks.BlueMask)
                   );
      }

      CopyMem (Destination, Configure->LineBuffer, WidthInBytes);
      Source      += DeltaPixels;
      Destination += PixelsPerScanLine;
      Height--;
    }
  }

  return EFI_SUCCESS;
}

RETURN_STATUS
BlitLibBufferToVideo90 (
  IN  OC_BLIT_CONFIGURE              *Configure,
  IN  EFI_GRAPHICS_OUTPUT_BLT_PIXEL  *BltBuffer,
  IN  UINTN                          SourceX,
  IN  UINTN                          SourceY,
  IN  UINTN                          DestinationX,
  IN  UINTN                          DestinationY,
  IN  UINTN                          Width,
  IN  UINTN                          Height,
  IN  UINTN                          DeltaPixels
  )
{
  UINT32  *Source;
  UINT32  *Destination;
  UINT32  *SourceWalker;
  UINT32  *DestinationWalker;
  UINTN   IndexX;
  UINTN   PixelsPerScanLine;
  UINT32  Uint32;

  PixelsPerScanLine = Configure->PixelsPerScanLine;

  Destination = (UINT32 *)Configure->FrameBuffer
                + (Configure->Width - DestinationY - 1);
  Source = (UINT32 *)BltBuffer
           + SourceY * DeltaPixels + SourceX;

  if (Configure->PixelFormat == PixelBlueGreenRedReserved8BitPerColor) {
    Uint32 = ((UINT32)SourceX | (UINT32)SourceY
              | (UINT32)DestinationX  | (UINT32)DestinationY
              | (UINT32)Width         | (UINT32)Height
              | (UINT32)DeltaPixels   | (UINT32)PixelsPerScanLine) & (16 - 1);

    switch (Uint32) {
      case 0:
      {
        CONST UINTN  BlockWidth = 16;
        Destination += DestinationX * PixelsPerScanLine;
        for (UINTN Index = 0; Index < Height; Index += BlockWidth) {
          for (UINTN Index2 = 0; Index2 < Width; Index2 += BlockWidth) {
            UINT32  *A = Source + Index * DeltaPixels + Index2;
            UINT32  *B = Destination + Index2 * PixelsPerScanLine - Index;
            //
            // Unrolling this one is ineffecient due to loop size(?). Gets down from 160 to 90 FPS.
            //
            for (UINTN BlockIndex = 0; BlockIndex < BlockWidth; BlockIndex++) {
              for (UINTN BlockIndex2 = 0; BlockIndex2 < BlockWidth; BlockIndex2++) {
                B[BlockIndex2 * PixelsPerScanLine - BlockIndex] = A[BlockIndex * DeltaPixels + BlockIndex2];
              }
            }
          }
        }
      }
        return EFI_SUCCESS;
      case 8:
      {
        CONST UINTN  BlockWidth = 8;
        Destination += DestinationX * PixelsPerScanLine;
        for (UINTN Index = 0; Index < Height; Index += BlockWidth) {
          for (UINTN Index2 = 0; Index2 < Width; Index2 += BlockWidth) {
            UINT32  *A = Source + Index * DeltaPixels + Index2;
            UINT32  *B = Destination + Index2 * PixelsPerScanLine - Index;
            for (UINTN BlockIndex = 0; BlockIndex < BlockWidth; BlockIndex++) {
 #if 0                /* Old compilers cannot unroll, disable for now */
              #pragma clang loop unroll(full)
 #endif
              for (UINTN BlockIndex2 = 0; BlockIndex2 < BlockWidth; BlockIndex2++) {
                B[BlockIndex2 * PixelsPerScanLine - BlockIndex] = A[BlockIndex * DeltaPixels + BlockIndex2];
              }
            }
          }
        }
      }
        return EFI_SUCCESS;
      case 4:
      {
        CONST UINTN  BlockWidth = 4;
        Destination += DestinationX * PixelsPerScanLine;
        for (UINTN Index = 0; Index < Height; Index += BlockWidth) {
          for (UINTN Index2 = 0; Index2 < Width; Index2 += BlockWidth) {
            UINT32  *A = Source + Index * DeltaPixels + Index2;
            UINT32  *B = Destination + Index2 * PixelsPerScanLine - Index;
            for (UINTN BlockIndex = 0; BlockIndex < BlockWidth; BlockIndex++) {
 #if 0                /* Old compilers cannot unroll, disable for now */
              #pragma clang loop unroll(full)
 #endif
              for (UINTN BlockIndex2 = 0; BlockIndex2 < BlockWidth; BlockIndex2++) {
                B[BlockIndex2 * PixelsPerScanLine - BlockIndex] = A[BlockIndex * DeltaPixels + BlockIndex2];
              }
            }
          }
        }
      }
        return EFI_SUCCESS;
      case 2:
      {
        CONST UINTN  BlockWidth = 2;
        Destination += DestinationX * PixelsPerScanLine;
        for (UINTN Index = 0; Index < Height; Index += BlockWidth) {
          for (UINTN Index2 = 0; Index2 < Width; Index2 += BlockWidth) {
            UINT32  *A = Source + Index * DeltaPixels + Index2;
            UINT32  *B = Destination + Index2 * PixelsPerScanLine - Index;
            for (UINTN BlockIndex = 0; BlockIndex < BlockWidth; BlockIndex++) {
 #if 0                /* Old compilers cannot unroll, disable for now */
              #pragma clang loop unroll(full)
 #endif
              for (UINTN BlockIndex2 = 0; BlockIndex2 < BlockWidth; BlockIndex2++) {
                B[BlockIndex2 * PixelsPerScanLine - BlockIndex] = A[BlockIndex * DeltaPixels + BlockIndex2];
              }
            }
          }
        }
      }
        return EFI_SUCCESS;
      default:
        break;
    }

    while (Height > 0) {
      DestinationWalker = Destination;
      SourceWalker      = Source;
      for (IndexX = DestinationX; IndexX < DestinationX + Width; IndexX++) {
        DestinationWalker[IndexX * PixelsPerScanLine] = *SourceWalker++;
      }

      Source += DeltaPixels;
      Destination--;
      Height--;
    }
  } else {
    while (Height > 0) {
      DestinationWalker = Destination;
      SourceWalker      = Source;
      for (IndexX = DestinationX; IndexX < DestinationX + Width; IndexX++) {
        Uint32                                        = *SourceWalker++;
        DestinationWalker[IndexX * PixelsPerScanLine] =
          (UINT32)(
                   (((Uint32 << Configure->PixelShl[0]) >> Configure->PixelShr[0]) &
                    Configure->PixelMasks.RedMask) |
                   (((Uint32 << Configure->PixelShl[1]) >> Configure->PixelShr[1]) &
                    Configure->PixelMasks.GreenMask) |
                   (((Uint32 << Configure->PixelShl[2]) >> Configure->PixelShr[2]) &
                    Configure->PixelMasks.BlueMask)
                   );
      }

      Source += DeltaPixels;
      Destination--;
      Height--;
    }
  }

  return EFI_SUCCESS;
}

RETURN_STATUS
BlitLibBufferToVideo180 (
  IN  OC_BLIT_CONFIGURE              *Configure,
  IN  EFI_GRAPHICS_OUTPUT_BLT_PIXEL  *BltBuffer,
  IN  UINTN                          SourceX,
  IN  UINTN                          SourceY,
  IN  UINTN                          DestinationX,
  IN  UINTN                          DestinationY,
  IN  UINTN                          Width,
  IN  UINTN                          Height,
  IN  UINTN                          DeltaPixels
  )
{
  UINT32  *Source;
  UINT32  *Destination;
  UINT32  *SourceWalker;
  UINT32  *DestinationWalker;
  UINTN   IndexX;
  UINTN   PixelsPerScanLine;
  UINT32  Uint32;

  PixelsPerScanLine = Configure->PixelsPerScanLine;

  DestinationX = Configure->Width  - DestinationX - Width;
  DestinationY = Configure->Height - DestinationY - Height;

  Destination = (UINT32 *)Configure->FrameBuffer
                + (DestinationY + (Height - 1)) * PixelsPerScanLine + DestinationX;
  Source = (UINT32 *)BltBuffer
           + SourceY * DeltaPixels + SourceX;

  if (Configure->PixelFormat == PixelBlueGreenRedReserved8BitPerColor) {
    while (Height > 0) {
      DestinationWalker = Destination;
      SourceWalker      = Source + (Width - 1);
      for (IndexX = 0; IndexX < Width; IndexX++) {
        *DestinationWalker++ = *SourceWalker--;
      }

      Source      += DeltaPixels;
      Destination -= PixelsPerScanLine;
      Height--;
    }
  } else {
    while (Height > 0) {
      DestinationWalker = Destination;
      SourceWalker      = Source + (Width - 1);
      for (IndexX = 0; IndexX < Width; IndexX++) {
        Uint32               = *SourceWalker--;
        *DestinationWalker++ =
          (UINT32)(
                   (((Uint32 << Configure->PixelShl[0]) >> Configure->PixelShr[0]) &
                    Configure->PixelMasks.RedMask) |
                   (((Uint32 << Configure->PixelShl[1]) >> Configure->PixelShr[1]) &
                    Configure->PixelMasks.GreenMask) |
                   (((Uint32 << Configure->PixelShl[2]) >> Configure->PixelShr[2]) &
                    Configure->PixelMasks.BlueMask)
                   );
      }

      Source      += DeltaPixels;
      Destination -= PixelsPerScanLine;
      Height--;
    }
  }

  return EFI_SUCCESS;
}

RETURN_STATUS
BlitLibBufferToVideo270 (
  IN  OC_BLIT_CONFIGURE              *Configure,
  IN  EFI_GRAPHICS_OUTPUT_BLT_PIXEL  *BltBuffer,
  IN  UINTN                          SourceX,
  IN  UINTN                          SourceY,
  IN  UINTN                          DestinationX,
  IN  UINTN                          DestinationY,
  IN  UINTN                          Width,
  IN  UINTN                          Height,
  IN  UINTN                          DeltaPixels
  )
{
  UINT32  *Source;
  UINT32  *Destination;
  UINT32  *SourceWalker;
  UINT32  *DestinationWalker;
  UINTN   LastX;
  UINTN   IndexX;
  UINTN   PixelsPerScanLine;
  UINT32  Uint32;

  PixelsPerScanLine = Configure->PixelsPerScanLine;

  Destination = (UINT32 *)Configure->FrameBuffer
                + DestinationY;
  Source = (UINT32 *)BltBuffer
           + SourceY * DeltaPixels + SourceX;

  if (Configure->PixelFormat == PixelBlueGreenRedReserved8BitPerColor) {
    Uint32 = ((UINT32)SourceX | (UINT32)SourceY
              | (UINT32)DestinationX  | (UINT32)DestinationY
              | (UINT32)Width         | (UINT32)Height
              | (UINT32)DeltaPixels   | (UINT32)PixelsPerScanLine) & (16 - 1);

    switch (Uint32) {
      case 0:
      {
        CONST UINTN  BlockWidth = 16;
        Destination += (Configure->Height - DestinationX - 1) * PixelsPerScanLine;
        for (UINTN Index = 0; Index < Height; Index += BlockWidth) {
          for (UINTN Index2 = 0; Index2 < Width; Index2 += BlockWidth) {
            UINT32  *A = Source + Index * DeltaPixels + Index2;
            UINT32  *B = Destination - Index2 * PixelsPerScanLine + Index;
            for (UINTN BlockIndex = 0; BlockIndex < BlockWidth; BlockIndex++) {
 #if 0                /* Old compilers cannot unroll, disable for now */
              #pragma clang loop unroll(full)
 #endif
              for (UINTN BlockIndex2 = 0; BlockIndex2 < BlockWidth; BlockIndex2++) {
                B[BlockIndex - BlockIndex2 * PixelsPerScanLine] = A[BlockIndex * DeltaPixels + BlockIndex2];
              }
            }
          }
        }
      }
        return EFI_SUCCESS;
      case 8:
      {
        CONST UINTN  BlockWidth = 8;
        Destination += (Configure->Height - DestinationX - 1) * PixelsPerScanLine;
        for (UINTN Index = 0; Index < Height; Index += BlockWidth) {
          for (UINTN Index2 = 0; Index2 < Width; Index2 += BlockWidth) {
            UINT32  *A = Source + Index * DeltaPixels + Index2;
            UINT32  *B = Destination - Index2 * PixelsPerScanLine + Index;
            for (UINTN BlockIndex = 0; BlockIndex < BlockWidth; BlockIndex++) {
 #if 0                /* Old compilers cannot unroll, disable for now */
              #pragma clang loop unroll(full)
 #endif
              for (UINTN BlockIndex2 = 0; BlockIndex2 < BlockWidth; BlockIndex2++) {
                B[BlockIndex - BlockIndex2 * PixelsPerScanLine] = A[BlockIndex * DeltaPixels + BlockIndex2];
              }
            }
          }
        }
      }
        return EFI_SUCCESS;
      case 4:
      {
        CONST UINTN  BlockWidth = 4;
        Destination += (Configure->Height - DestinationX - 1) * PixelsPerScanLine;
        for (UINTN Index = 0; Index < Height; Index += BlockWidth) {
          for (UINTN Index2 = 0; Index2 < Width; Index2 += BlockWidth) {
            UINT32  *A = Source + Index * DeltaPixels + Index2;
            UINT32  *B = Destination - Index2 * PixelsPerScanLine + Index;
            for (UINTN BlockIndex = 0; BlockIndex < BlockWidth; BlockIndex++) {
 #if 0                /* Old compilers cannot unroll, disable for now */
              #pragma clang loop unroll(full)
 #endif
              for (UINTN BlockIndex2 = 0; BlockIndex2 < BlockWidth; BlockIndex2++) {
                B[BlockIndex - BlockIndex2 * PixelsPerScanLine] = A[BlockIndex * DeltaPixels + BlockIndex2];
              }
            }
          }
        }
      }
        return EFI_SUCCESS;
      case 2:
      {
        CONST UINTN  BlockWidth = 2;
        Destination += (Configure->Height - DestinationX - 1) * PixelsPerScanLine;
        for (UINTN Index = 0; Index < Height; Index += BlockWidth) {
          for (UINTN Index2 = 0; Index2 < Width; Index2 += BlockWidth) {
            UINT32  *A = Source + Index * DeltaPixels + Index2;
            UINT32  *B = Destination - Index2 * PixelsPerScanLine + Index;
            for (UINTN BlockIndex = 0; BlockIndex < BlockWidth; BlockIndex++) {
 #if 0                /* Old compilers cannot unroll, disable for now */
              #pragma clang loop unroll(full)
 #endif
              for (UINTN BlockIndex2 = 0; BlockIndex2 < BlockWidth; BlockIndex2++) {
                B[BlockIndex - BlockIndex2 * PixelsPerScanLine] = A[BlockIndex * DeltaPixels + BlockIndex2];
              }
            }
          }
        }
      }
        return EFI_SUCCESS;
      default:
        break;
    }

    while (Height > 0) {
      DestinationWalker = Destination;
      SourceWalker      = Source;
      LastX             = Configure->Height - DestinationX - 1;
      for (IndexX = 0; IndexX < Width; IndexX++) {
        DestinationWalker[(LastX - IndexX) * PixelsPerScanLine] = *SourceWalker++;
      }

      Source += DeltaPixels;
      Destination++;
      Height--;
    }
  } else {
    while (Height > 0) {
      DestinationWalker = Destination;
      SourceWalker      = Source;
      LastX             = Configure->Height - DestinationX - 1;
      for (IndexX = 0; IndexX < Width; IndexX++) {
        Uint32                                                  = *SourceWalker++;
        DestinationWalker[(LastX - IndexX) * PixelsPerScanLine] =
          (UINT32)(
                   (((Uint32 << Configure->PixelShl[0]) >> Configure->PixelShr[0]) &
                    Configure->PixelMasks.RedMask) |
                   (((Uint32 << Configure->PixelShl[1]) >> Configure->PixelShr[1]) &
                    Configure->PixelMasks.GreenMask) |
                   (((Uint32 << Configure->PixelShl[2]) >> Configure->PixelShr[2]) &
                    Configure->PixelMasks.BlueMask)
                   );
      }

      Source += DeltaPixels;
      Destination--;
      Height--;
    }
  }

  return EFI_SUCCESS;
}