painting.c

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

#include "precomp.h"


#if 0 /* FIXME: enable this as soon as we have working usermode gdi */

// Will move to dc.c
HGDIOBJ
STDCALL
GetDCObject( HDC hDC, INT iType)
{

 if((iType == GDI_OBJECT_TYPE_BRUSH) ||
    (iType == GDI_OBJECT_TYPE_EXTPEN)||
    (iType == GDI_OBJECT_TYPE_PEN)   ||
    (iType == GDI_OBJECT_TYPE_COLORSPACE))
 {
   HGDIOBJ hGO;
   PDC_ATTR Dc_Attr;
   
   if (!GdiGetHandleUserData((HGDIOBJ) hDC, (PVOID) &Dc_Attr)) return NULL;

   switch (iType)
   {
     case GDI_OBJECT_TYPE_BRUSH:
          hGO = Dc_Attr->hbrush;  
          break;
     
     case GDI_OBJECT_TYPE_EXTPEN:
     case GDI_OBJECT_TYPE_PEN:
          hGO = Dc_Attr->hpen;
          break;
     
     case GDI_OBJECT_TYPE_COLORSPACE:
          hGO = Dc_Attr->hColorSpace;
          break;
   }   
   return hGO;
 }  
 return NtGdiGetDCObject( hDC, iType );
}


BOOL
STDCALL
LineTo( HDC hDC, INT x, INT y )
{
// Handle something other than a normal dc object.
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC)
 {
    if (GDI_HANDLE_GET_TYPE(hDC) == GDI_OBJECT_TYPE_METADC)
      return MFDRV_MetaParam2( hDC, META_LINETO, x, y);
    else
    {
      PLDC pLDC = GdiGetLDC(hDC);
      if ( !pLDC )
      {
         SetLastError(ERROR_INVALID_HANDLE);
         return FALSE;
      }
      if (pLDC->iType == LDC_EMFLDC)
      {
        return MFDRV_LineTo( hDC, x, y )
      }
      return FALSE;
    }
 }
 return NtGdiLineTo( hDC, x, y);
}


BOOL
STDCALL
MoveToEx( HDC hDC, INT x, INT y, LPPOINT Point )
{
 PDC_ATTR Dc_Attr;
 
 if (!GdiGetHandleUserData((HGDIOBJ) hDC, (PVOID) &Dc_Attr)) return FALSE;
 
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC)
 {
    if (GDI_HANDLE_GET_TYPE(hDC) == GDI_OBJECT_TYPE_METADC)
      return MFDRV_MetaParam2( hDC, META_MOVETO, x, y);
    else
    {
      PLDC pLDC = Dc_Attr->pvLDC;
      if ( !pLDC )
      {
         SetLastError(ERROR_INVALID_HANDLE);
         return FALSE;
      }
      if (pLDC->iType == LDC_EMFLDC)
      {
        if (!EMFDRV_MoveTo( hDC, x, y)) return FALSE;
      }
    }
 }

 if ( Point )
 {
    if ( Dc_Attr->ulDirty_ & DIRTY_PTLCURRENT ) // Double hit!
    {
       Point->x = Dc_Attr->ptfxCurrent.x; // ret prev before change.
       Point->y = Dc_Attr->ptfxCurrent.y;
       DPtoLP ( hDC, Point, 1);          // reconvert back.
    }
    else
    {
       Point->x = Dc_Attr->ptlCurrent.x;
       Point->y = Dc_Attr->ptlCurrent.y;
    }
 }

 Dc_Attr->ptlCurrent.x = x;
 Dc_Attr->ptlCurrent.y = y;
 
 Dc_Attr->ulDirty_ |= ( DIRTY_PTLCURRENT|DIRTY_STYLESTATE); // Set dirty
 return TRUE;
}


BOOL
STDCALL
Ellipse(HDC hDC, INT Left, INT Top, INT Right, INT Bottom)
{
// Handle something other than a normal dc object.
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC)
 {
    if (GDI_HANDLE_GET_TYPE(hDC) == GDI_OBJECT_TYPE_METADC)
      return MFDRV_MetaParam4(hDC, META_ELLIPSE, Left, Top, Right, Bottom );
    else
    {
      PLDC pLDC = GdiGetLDC(hDC);
      if ( !pLDC )
      {
         SetLastError(ERROR_INVALID_HANDLE);
         return FALSE;
      }
      if (pLDC->iType == LDC_EMFLDC)
      {
        return EMFDRV_Ellipse( hDC, Left, Top, Right, Bottom );
      }
      return FALSE;
    }
 }
 return NtGdiEllipse( hDC, Left, Top, Right, Bottom);
}


BOOL
STDCALL
Rectangle(HDC, INT Left, INT Top, INT Right, INT Bottom)
{
// Handle something other than a normal dc object.
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC)
 {
    if (GDI_HANDLE_GET_TYPE(hDC) == GDI_OBJECT_TYPE_METADC)
      return MFDRV_MetaParam4(hDC, META_RECTANGLE, Left, Top, Right, Bottom );
    else
    {
      PLDC pLDC = GdiGetLDC(hDC);
      if ( !pLDC )
      {
         SetLastError(ERROR_INVALID_HANDLE);
         return FALSE;
      }
      if (pLDC->iType == LDC_EMFLDC)
      {
        return EMFDRV_Rectangle( hDC, Left, Top, Right, Bottom );
      }
      return FALSE;
    }
 }
 return NtGdiRectangle( hDC, Left, Top, Right, Bottom);
}


BOOL
STDCALL
RoundRect(HDC, INT Left, INT Top, INT Right, INT Bottom, 
                                                INT ell_Width, INT ell_Height)
{
// Handle something other than a normal dc object.
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC)
 {
    if (GDI_HANDLE_GET_TYPE(hDC) == GDI_OBJECT_TYPE_METADC)
      return MFDRV_MetaParam6( hDC, META_ROUNDRECT, Left, Top, Right, Bottom,
                                                      ell_Width, ell_Height  );
    else
    {
      PLDC pLDC = GdiGetLDC(hDC);
      if ( !pLDC )
      {
         SetLastError(ERROR_INVALID_HANDLE);
         return FALSE;
      }
      if (pLDC->iType == LDC_EMFLDC)
      {
        return EMFDRV_RoundRect( hDC, Left, Top, Right, Bottom, 
                                                      ell_Width, ell_Height );
      }
      return FALSE;
    }
 }
 return NtGdiRoundRect( hDc, Left, Top, Right, Bottom, ell_Width, ell_Height);
}


COLORREF
STDCALL
GetPixel( HDC hDC, INT x, INT y )
{
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC) return CLR_INVALID;
 if (!GdiIsHandleValid((HGDIOBJ) hDC)) return CLR_INVALID;
 return NtGdiGetPixel( hDC, x, y);
}


COLORREF
STDCALL
SetPixel( HDC hDC, INT x, INT y, COLORREF Color )
{
// Handle something other than a normal dc object.
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC)
 {
    if (GDI_HANDLE_GET_TYPE(hDC) == GDI_OBJECT_TYPE_METADC)
      return MFDRV_MetaParam4(hDC, META_SETPIXEL, x, y, HIWORD(Color),
                                                              LOWORD(Color));
    else
    {
      PLDC pLDC = GdiGetLDC(hDC);
      if ( !pLDC )
      {
         SetLastError(ERROR_INVALID_HANDLE);
         return 0;
      }
      if (pLDC->iType == LDC_EMFLDC)
      {
        return EMFDRV_SetPixel( hDC, x, y, Color );
      }
      return 0;
    }
 }
 return NtGdiSetPixel( hDC, x, y, Color);
}


BOOL
STDCALL
SetPixelV( HDC hDC, INT x, INT y, COLORREF Color )
{
   COLORREF Cr = SetPixel( hDC, x, y, Color );
   if (Cr) return TRUE;
   return FALSE;
}


BOOL
STDCALL
FillRgn( HDC hDC, HRGN hRgn, HBRUSH hBrush )
{

 if ( (!hRgn) || (!hBrush) ) return FALSE;
 
// Handle something other than a normal dc object.
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC)
 {
    if (GDI_HANDLE_GET_TYPE(hDC) == GDI_OBJECT_TYPE_METADC)
      return MFDRV_FillRgn( hDC, hRgn, hBrush);
    else
    {
      PLDC pLDC = GdiGetLDC(hDC);
      if ( !pLDC )
      {
         SetLastError(ERROR_INVALID_HANDLE);
         return FALSE;
      }
      if (pLDC->iType == LDC_EMFLDC)
      {
        return EMFDRV_FillRgn(( hDC, hRgn, hBrush);
      }
      return FALSE;
    }
 }
 return NtGdiFillRgn( hDC, hRgn, hBrush);
}


BOOL
STDCALL
FrameRgn( HDC hDC, HRGN hRgn, HBRUSH hBrush, INT nWidth, INT nHeight )
{

 if ( (!hRgn) || (!hBrush) ) return FALSE;
 
// Handle something other than a normal dc object.
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC)
 {
    if (GDI_HANDLE_GET_TYPE(hDC) == GDI_OBJECT_TYPE_METADC)
      return MFDRV_FrameRgn( hDC, hRgn, hBrush, nWidth, nHeight );
    else
    {
      PLDC pLDC = GdiGetLDC(hDC);
      if ( !pLDC )
      {
         SetLastError(ERROR_INVALID_HANDLE);
         return FALSE;
      }
      if (pLDC->iType == LDC_EMFLDC)
      {
        return EMFDRV_FrameRgn( hDC, hRgn, hBrush, nWidth, nHeight );
      }
      return FALSE;
    }
 }
 return NtGdiFrameRgn( hDC, hRgn, hBrush, nWidth, nHeight);
}


BOOL
STDCALL
InvertRgn( HDC hDC, HRGN hRgn )
{

 if ( !hRgn ) return FALSE;
 
// Handle something other than a normal dc object.
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC)
 {
    if (GDI_HANDLE_GET_TYPE(hDC) == GDI_OBJECT_TYPE_METADC)
      return MFDRV_InvertRgn( hDC, HRGN hRgn ); // Use this instead of MFDRV_MetaParam.
    else
    {  
      PLDC pLDC = GdiGetLDC(hDC);
      if ( !pLDC )
      {
         SetLastError(ERROR_INVALID_HANDLE);
         return FALSE;
      }
      if (pLDC->iType == LDC_EMFLDC)
      {
        return EMFDRV_PaintInvertRgn( hDC, hRgn, EMR_INVERTRGN );
      }
      return FALSE;
    }
 }
 return NtGdiInvertRgn( hDC, hRgn);
}

BOOL
STDCALL
PaintRgn( HDC hDC, HRGN hRgn )
{
// Handle something other than a normal dc object.
 if (GDI_HANDLE_GET_TYPE(hDC) != GDI_OBJECT_TYPE_DC)
 {
    if (GDI_HANDLE_GET_TYPE(hDC) == GDI_OBJECT_TYPE_METADC)
      return MFDRV_PaintRgn( hDC, HRGN hRgn ); // Use this instead of MFDRV_MetaParam.
    else