BOOLEAN DIB_32BPP_TransparentBlt	(	SURFOBJ *	DestSurf,
		SURFOBJ *	SourceSurf,
		RECTL *	DestRect,
		RECTL *	SourceRect,
		XLATEOBJ *	ColorTranslation,
		ULONG	iTransColor
	)

Definition at line 283 of file dib32bpp.c.

{
  LONG X, Y, SourceX, SourceY = 0, wd;
  ULONG *DestBits, Source = 0;

  LONG DstHeight;
  LONG DstWidth;
  LONG SrcHeight;
  LONG SrcWidth;

  DstHeight = DestRect->bottom - DestRect->top;
  DstWidth = DestRect->right - DestRect->left;
  SrcHeight = SourceRect->bottom - SourceRect->top;
  SrcWidth = SourceRect->right - SourceRect->left;

  DestBits = (ULONG*)((PBYTE)DestSurf->pvScan0 +
    (DestRect->left << 2) +
    DestRect->top * DestSurf->lDelta);
  wd = DestSurf->lDelta - ((DestRect->right - DestRect->left) << 2);

  for (Y = DestRect->top; Y < DestRect->bottom; Y++)
  {
    SourceY = SourceRect->top+(Y - DestRect->top) * SrcHeight / DstHeight;
    for (X = DestRect->left; X < DestRect->right; X++, DestBits++)
    {
      SourceX = SourceRect->left+(X - DestRect->left) * SrcWidth / DstWidth;
      if (SourceX >= 0 && SourceY >= 0 &&
        SourceSurf->sizlBitmap.cx > SourceX && SourceSurf->sizlBitmap.cy > SourceY)
      {
        Source = DIB_GetSourceIndex(SourceSurf, SourceX, SourceY);
        if (Source != iTransColor)
        {
          *DestBits = XLATEOBJ_iXlate(ColorTranslation, Source);
        }
      }
    }

    DestBits = (ULONG*)((ULONG_PTR)DestBits + wd);
  }

  return TRUE;
}

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