dc.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

/////////////////////////////////////////////////////////////////////////////
// Name:        src/mac/classic/dc.cpp
// Purpose:     wxDC class
// Author:      Stefan Csomor
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id: dc.cpp,v 1.15 2006/07/03 19:02:32 ABX Exp $
// Copyright:   (c) Stefan Csomor
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#include "wx/wxprec.h"

#include "wx/dc.h"

#ifndef WX_PRECOMP
    #include "wx/log.h"
    #include "wx/app.h"
    #include "wx/dcmemory.h"
    #include "wx/dcprint.h"
    #include "wx/region.h"
    #include "wx/image.h"
#endif

#include "wx/mac/uma.h"

#if __MSL__ >= 0x6000
namespace std {}
using namespace std ;
#endif

#include "wx/mac/private.h"
#include <ATSUnicode.h>
#include <TextCommon.h>
#include <TextEncodingConverter.h>
#include <FixMath.h>

IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)

//-----------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------

const double RAD2DEG  = 180.0 / M_PI;
const short kEmulatedMode = -1 ;
const short kUnsupportedMode = -2 ;

extern TECObjectRef s_TECNativeCToUnicode ;

// set to 0 if problems arise
#define wxMAC_EXPERIMENTAL_DC 1

wxMacPortSetter::wxMacPortSetter( const wxDC* dc ) :
    m_ph( (GrafPtr) dc->m_macPort )
{
    wxASSERT( dc->Ok() ) ;
    m_dc = dc ;
    dc->MacSetupPort(&m_ph) ;
}
wxMacPortSetter::~wxMacPortSetter()
{
    m_dc->MacCleanupPort(&m_ph) ;
}

#if wxMAC_EXPERIMENTAL_DC
class wxMacFastPortSetter
{
public :
    wxMacFastPortSetter( const wxDC *dc )
    {
        wxASSERT( dc->Ok() ) ;
        GetPort( &m_oldPort ) ;
        SetPort( (GrafPtr) dc->m_macPort ) ;
        m_clipRgn = NewRgn() ;
        GetClip( m_clipRgn ) ;
        m_dc = dc ;
        dc->MacSetupPort( NULL ) ;
    }
    ~wxMacFastPortSetter()
    {
        SetPort( (GrafPtr) m_dc->m_macPort ) ;
        SetClip( m_clipRgn ) ;
        SetPort( m_oldPort ) ;
        m_dc->MacCleanupPort( NULL ) ;
        DisposeRgn( m_clipRgn ) ;
    }
private :
    RgnHandle m_clipRgn ;
    GrafPtr m_oldPort ;
    const wxDC*   m_dc ;
} ;

#else
typedef wxMacPortSetter wxMacFastPortSetter ;
#endif

#if 0

// start moving to a dual implementation for QD and CGContextRef

class wxMacGraphicsContext
{
public :
    void DrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask ) = 0 ;
    void SetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) = 0 ;
    void SetClippingRegion( const wxRegion &region  ) = 0 ;
    void DestroyClippingRegion() = 0 ;
    void SetTextForeground( const wxColour &col ) = 0 ;
    void SetTextBackground( const wxColour &col ) = 0 ;
    void SetLogicalScale( double x , double y ) = 0 ;
    void SetUserScale( double x , double y ) = 0;
} ;

class wxMacQuickDrawContext : public wxMacGraphicsContext
{
public :
} ;

#endif

wxMacWindowClipper::wxMacWindowClipper( const wxWindow* win )
{
    m_formerClip = NewRgn() ;
    m_newClip = NewRgn() ;
    GetClip( m_formerClip ) ;

    if ( win )
    {
#if 0
        // this clipping area was set to the parent window's drawing area, lead to problems
        // with MacOSX controls drawing outside their wx' rectangle
        RgnHandle insidergn = NewRgn() ;
        int x = 0 , y = 0;
        wxWindow *parent = win->GetParent() ;
        parent->MacWindowToRootWindow( &x,&y ) ;
        wxSize size = parent->GetSize() ;
        SetRectRgn( insidergn , parent->MacGetLeftBorderSize() , parent->MacGetTopBorderSize() ,
            size.x - parent->MacGetRightBorderSize(),
            size.y - parent->MacGetBottomBorderSize()) ;
        CopyRgn( (RgnHandle) parent->MacGetVisibleRegion(false).GetWXHRGN() , m_newClip ) ;
        SectRgn( m_newClip , insidergn , m_newClip ) ;
        OffsetRgn( m_newClip , x , y ) ;
        SetClip( m_newClip ) ;
        DisposeRgn( insidergn ) ;
#else
        int x = 0 , y = 0;
        win->MacWindowToRootWindow( &x,&y ) ;
        CopyRgn( (RgnHandle) ((wxWindow*)win)->MacGetVisibleRegion().GetWXHRGN() , m_newClip ) ;
        OffsetRgn( m_newClip , x , y ) ;
        SetClip( m_newClip ) ;
#endif
    }
}

wxMacWindowClipper::~wxMacWindowClipper()
{
    SetClip( m_formerClip ) ;
    DisposeRgn( m_newClip ) ;
    DisposeRgn( m_formerClip ) ;
}

//-----------------------------------------------------------------------------
// Local functions
//-----------------------------------------------------------------------------
static inline double dmin(double a, double b) { return a < b ? a : b; }
static inline double dmax(double a, double b) { return a > b ? a : b; }
static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }

//-----------------------------------------------------------------------------
// wxDC
//-----------------------------------------------------------------------------
// this function emulates all wx colour manipulations, used to verify the implementation
// by setting the mode in the blitting functions to kEmulatedMode
void wxMacCalculateColour( int logical_func , const RGBColor &srcColor , RGBColor &dstColor ) ;

void wxMacCalculateColour( int logical_func , const RGBColor &srcColor , RGBColor &dstColor )
{
    switch ( logical_func )
    {
        case wxAND:        // src AND dst
            dstColor.red = dstColor.red & srcColor.red ;
            dstColor.green = dstColor.green & srcColor.green ;
            dstColor.blue = dstColor.blue & srcColor.blue ;
            break ;
        case wxAND_INVERT: // (NOT src) AND dst
            dstColor.red = dstColor.red & ~srcColor.red ;
            dstColor.green = dstColor.green & ~srcColor.green ;
            dstColor.blue = dstColor.blue & ~srcColor.blue ;
            break ;
        case wxAND_REVERSE:// src AND (NOT dst)
            dstColor.red = ~dstColor.red & srcColor.red ;
            dstColor.green = ~dstColor.green & srcColor.green ;
            dstColor.blue = ~dstColor.blue & srcColor.blue ;
            break ;
        case wxCLEAR:      // 0
            dstColor.red = 0 ;
            dstColor.green = 0 ;
            dstColor.blue = 0 ;
            break ;
        case wxCOPY:       // src
            dstColor.red = srcColor.red ;
            dstColor.green = srcColor.green ;
            dstColor.blue = srcColor.blue ;
            break ;
        case wxEQUIV:      // (NOT src) XOR dst
            dstColor.red = dstColor.red ^ ~srcColor.red ;
            dstColor.green = dstColor.green ^ ~srcColor.green ;
            dstColor.blue = dstColor.blue ^ ~srcColor.blue ;
            break ;
        case wxINVERT:     // NOT dst
            dstColor.red = ~dstColor.red ;
            dstColor.green = ~dstColor.green ;
            dstColor.blue = ~dstColor.blue ;
            break ;
        case wxNAND:       // (NOT src) OR (NOT dst)
            dstColor.red = ~dstColor.red | ~srcColor.red ;
            dstColor.green = ~dstColor.green | ~srcColor.green ;
            dstColor.blue = ~dstColor.blue | ~srcColor.blue ;
            break ;
        case wxNOR:        // (NOT src) AND (NOT dst)
            dstColor.red = ~dstColor.red & ~srcColor.red ;
            dstColor.green = ~dstColor.green & ~srcColor.green ;
            dstColor.blue = ~dstColor.blue & ~srcColor.blue ;
            break ;
        case wxNO_OP:      // dst
            break ;
        case wxOR:         // src OR dst
            dstColor.red = dstColor.red | srcColor.red ;
            dstColor.green = dstColor.green | srcColor.green ;
            dstColor.blue = dstColor.blue | srcColor.blue ;
            break ;
        case wxOR_INVERT:  // (NOT src) OR dst
            dstColor.red = dstColor.red | ~srcColor.red ;
            dstColor.green = dstColor.green | ~srcColor.green ;
            dstColor.blue = dstColor.blue | ~srcColor.blue ;
            break ;
        case wxOR_REVERSE: // src OR (NOT dst)
            dstColor.red = ~dstColor.red | srcColor.red ;
            dstColor.green = ~dstColor.green | srcColor.green ;
            dstColor.blue = ~dstColor.blue | srcColor.blue ;
            break ;
        case wxSET:        // 1
            dstColor.red = 0xFFFF ;
            dstColor.green = 0xFFFF ;
            dstColor.blue = 0xFFFF ;
            break ;
        case wxSRC_INVERT: // (NOT src)
            dstColor.red = ~srcColor.red ;
            dstColor.green = ~srcColor.green ;
            dstColor.blue = ~srcColor.blue ;
            break ;
        case wxXOR:        // src XOR dst
            dstColor.red = dstColor.red ^ srcColor.red ;
            dstColor.green = dstColor.green ^ srcColor.green ;
            dstColor.blue = dstColor.blue ^ srcColor.blue ;
            break ;
    }
}

wxDC::wxDC()
{
    m_ok = false;
    m_colour = true;
    m_mm_to_pix_x = mm2pt;
    m_mm_to_pix_y = mm2pt;
    m_internalDeviceOriginX = 0;
    m_internalDeviceOriginY = 0;
    m_externalDeviceOriginX = 0;
    m_externalDeviceOriginY = 0;
    m_logicalScaleX = 1.0;
    m_logicalScaleY = 1.0;
    m_userScaleX = 1.0;
    m_userScaleY = 1.0;
    m_scaleX = 1.0;
    m_scaleY = 1.0;
    m_needComputeScaleX = false;
    m_needComputeScaleY = false;
    m_macPort = NULL ;
    m_macMask = NULL ;
    m_ok = false ;
    m_macFontInstalled = false ;
    m_macBrushInstalled = false ;
    m_macPenInstalled = false ;
    m_macLocalOrigin.x = m_macLocalOrigin.y = 0 ;
    m_macBoundaryClipRgn = NewRgn() ;
    m_macCurrentClipRgn = NewRgn() ;
    SetRectRgn( (RgnHandle) m_macBoundaryClipRgn , -32000 , -32000 , 32000 , 32000 ) ;
    SetRectRgn( (RgnHandle) m_macCurrentClipRgn , -32000 , -32000 , 32000 , 32000 ) ;
    m_pen = *wxBLACK_PEN;
    m_font = *wxNORMAL_FONT;
    m_brush = *wxWHITE_BRUSH;
#ifdef __WXDEBUG__
    // needed to debug possible errors with two active drawing methods at the same time on
    // the same DC
    m_macCurrentPortStateHelper = NULL ;
#endif
    m_macATSUIStyle = NULL ;
    m_macAliasWasEnabled = false;
    m_macForegroundPixMap = NULL ;
    m_macBackgroundPixMap = NULL ;
}

wxDC::~wxDC(void)
{
    DisposeRgn( (RgnHandle) m_macBoundaryClipRgn ) ;
    DisposeRgn( (RgnHandle) m_macCurrentClipRgn ) ;
}

void wxDC::MacSetupPort(wxMacPortStateHelper* help) const
{
#ifdef __WXDEBUG__
    wxASSERT( m_macCurrentPortStateHelper == NULL ) ;
    m_macCurrentPortStateHelper = help ;
#endif
    SetClip( (RgnHandle) m_macCurrentClipRgn);
#if ! wxMAC_EXPERIMENTAL_DC
    m_macFontInstalled = false ;
    m_macBrushInstalled = false ;
    m_macPenInstalled = false ;
#endif
}
void wxDC::MacCleanupPort(wxMacPortStateHelper* help) const
{
#ifdef __WXDEBUG__
    wxASSERT( m_macCurrentPortStateHelper == help ) ;
    m_macCurrentPortStateHelper = NULL ;
#endif
    if( m_macATSUIStyle )
    {
        ::ATSUDisposeStyle((ATSUStyle)m_macATSUIStyle);
        m_macATSUIStyle = NULL ;
    }
    if ( m_macAliasWasEnabled )
    {
        SetAntiAliasedTextEnabled(m_macFormerAliasState, m_macFormerAliasSize);
        m_macAliasWasEnabled = false ;
    }
    if ( m_macForegroundPixMap )
    {
        Pattern blackColor ;
        ::PenPat(GetQDGlobalsBlack(&blackColor));
        DisposePixPat( (PixPatHandle) m_macForegroundPixMap ) ;
        m_macForegroundPixMap = NULL ;
    }
    if ( m_macBackgroundPixMap )
    {
        Pattern whiteColor ;
        ::BackPat(GetQDGlobalsWhite(&whiteColor));
        DisposePixPat( (PixPatHandle) m_macBackgroundPixMap ) ;
        m_macBackgroundPixMap = NULL ;
    }
}

void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
{
     wxCHECK_RET( Ok(), wxT("invalid window dc") );
     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
     wxMacFastPortSetter helper(this) ;
     wxCoord xx = XLOG2DEVMAC(x);
     wxCoord yy = YLOG2DEVMAC(y);
     wxCoord w = bmp.GetWidth();
     wxCoord h = bmp.GetHeight();
     wxCoord ww = XLOG2DEVREL(w);
     wxCoord hh = YLOG2DEVREL(h);
     // Set up drawing mode
     short  mode = (m_logicalFunction == wxCOPY ? srcCopy :
                    //m_logicalFunction == wxCLEAR ? WHITENESS :
                    //m_logicalFunction == wxSET ? BLACKNESS :
                    m_logicalFunction == wxINVERT ? hilite :
                   //m_logicalFunction == wxAND ? MERGECOPY :
                    m_logicalFunction == wxOR ? srcOr :
                    m_logicalFunction == wxSRC_INVERT ? notSrcCopy :
                    m_logicalFunction == wxXOR ? srcXor :
                    m_logicalFunction == wxOR_REVERSE ? notSrcOr :
                    //m_logicalFunction == wxAND_REVERSE ? SRCERASE :
                    //m_logicalFunction == wxSRC_OR ? srcOr :
                    //m_logicalFunction == wxSRC_AND ? SRCAND :
                    srcCopy );
     if ( bmp.GetBitmapType() == kMacBitmapTypePict ) {
         Rect bitmaprect = { 0 , 0 , hh, ww };
         ::OffsetRect( &bitmaprect, xx, yy ) ;
         ::DrawPicture( (PicHandle) bmp.GetPict(), &bitmaprect ) ;
    }
     else if ( bmp.GetBitmapType() == kMacBitmapTypeGrafWorld )
     {
         GWorldPtr    bmapworld = MAC_WXHBITMAP( bmp.GetHBITMAP() );
         PixMapHandle bmappixels ;
         // Set foreground and background colours (for bitmaps depth = 1)
         if(bmp.GetDepth() == 1)
        {
             RGBColor fore = MAC_WXCOLORREF(m_textForegroundColour.GetPixel());
             RGBColor back = MAC_WXCOLORREF(m_textBackgroundColour.GetPixel());
             RGBForeColor(&fore);
             RGBBackColor(&back);
         }