C++ IsOk函数代码示例

void wxGCDCImpl::DoDrawSpline(const wxPointList *points)
{
    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawSpline - invalid DC") );

    if ( !m_logicalFunctionSupported )
        return;

    wxGraphicsPath path = m_graphicContext->CreatePath();

    wxPointList::compatibility_iterator node = points->GetFirst();
    if ( !node )
        // empty list
        return;

    const wxPoint *p = node->GetData();

    wxCoord x1 = p->x;
    wxCoord y1 = p->y;

    node = node->GetNext();
    p = node->GetData();

    wxCoord x2 = p->x;
    wxCoord y2 = p->y;
    wxCoord cx1 = ( x1 + x2 ) / 2;
    wxCoord cy1 = ( y1 + y2 ) / 2;

    path.MoveToPoint( x1 , y1 );
    path.AddLineToPoint( cx1 , cy1 );
#if !wxUSE_STD_CONTAINERS

    while ((node = node->GetNext()) != NULL)
#else

    while ((node = node->GetNext()))
#endif // !wxUSE_STD_CONTAINERS

    {
        p = node->GetData();
        x1 = x2;
        y1 = y2;
        x2 = p->x;
        y2 = p->y;
        wxCoord cx4 = (x1 + x2) / 2;
        wxCoord cy4 = (y1 + y2) / 2;

        path.AddQuadCurveToPoint(x1 , y1 ,cx4 , cy4 );

        cx1 = cx4;
        cy1 = cy4;
    }

    path.AddLineToPoint( x2 , y2 );

    m_graphicContext->StrokePath( path );

    wxRect2DDouble box = path.GetBox();
    CalcBoundingBox(wxRound(box.m_x), wxRound(box.m_y));
    CalcBoundingBox(wxRound(box.m_x + box.m_width),
                    wxRound(box.m_y + box.m_height));
}

bool wxFont::GetStrikethrough() const
{
    wxCHECK_MSG( IsOk(), false, wxT("invalid font") );

    return M_FONTDATA->m_nativeFontInfo.GetStrikethrough();
}

int wxPen::GetDashCount() const
{
    wxCHECK_MSG( IsOk(), -1, wxT("invalid pen") );

    return (M_PENDATA->m_countDashes);
}

const wxNativeFontInfo *wxFont::GetNativeFontInfo() const
{
    wxCHECK_MSG( IsOk(), NULL, wxT("invalid font") );

    return &(M_FONTDATA->m_nativeFontInfo);
}

bool wxFont::GTKSetPangoAttrs(PangoLayout* layout) const
{
    if (!IsOk() || !(GetUnderlined() || GetStrikethrough()))
        return false;

    PangoAttrList* attrs = pango_attr_list_new();
    PangoAttribute* a;

    if (wx_pango_version_check(1,16,0))
    {
        // a PangoLayout which has leading/trailing spaces with underlined font
        // is not correctly drawn by this pango version: Pango won't underline the spaces.
        // This can be a problem; e.g. wxHTML rendering of underlined text relies on
        // this behaviour. To workaround this problem, we use a special hack here
        // suggested by pango maintainer Behdad Esfahbod: we prepend and append two
        // empty space characters and give them a dummy colour attribute.
        // This will force Pango to underline the leading/trailing spaces, too.

        const char* text = pango_layout_get_text(layout);
        const size_t n = strlen(text);
        if ((n > 0 && text[0] == ' ') || (n > 1 && text[n - 1] == ' '))
        {
            wxCharBuffer buf(n + 6);
            // copy the leading U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
            memcpy(buf.data(), "\342\200\214", 3);
            // copy the user string
            memcpy(buf.data() + 3, text, n);
            // copy the trailing U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
            memcpy(buf.data() + 3 + n, "\342\200\214", 3);

            pango_layout_set_text(layout, buf, n + 6);

            // Add dummy attributes (use colour as it's invisible anyhow for 0
            // width spaces) to ensure that the spaces in the beginning/end of the
            // string are underlined too.
            a = pango_attr_foreground_new(0x0057, 0x52A9, 0xD614);
            a->start_index = 0;
            a->end_index = 3;
            pango_attr_list_insert(attrs, a);

            a = pango_attr_foreground_new(0x0057, 0x52A9, 0xD614);
            a->start_index = n + 3;
            a->end_index = n + 6;
            pango_attr_list_insert(attrs, a);
        }
    }
    if (GetUnderlined())
    {
        a = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
        pango_attr_list_insert(attrs, a);
    }
    if (GetStrikethrough())
    {
        a = pango_attr_strikethrough_new(true);
        pango_attr_list_insert(attrs, a);
    }

    pango_layout_set_attributes(layout, attrs);
    pango_attr_list_unref(attrs);

    return true;
}

bool wxGCDCImpl::DoStretchBlit(
    wxCoord xdest, wxCoord ydest, wxCoord dstWidth, wxCoord dstHeight,
    wxDC *source, wxCoord xsrc, wxCoord ysrc, wxCoord srcWidth, wxCoord srcHeight,
    wxRasterOperationMode logical_func , bool useMask,
    wxCoord xsrcMask, wxCoord ysrcMask )
{
    wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid DC") );
    wxCHECK_MSG( source->IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid source DC") );

    if ( logical_func == wxNO_OP )
        return true;

    wxCompositionMode mode = TranslateRasterOp(logical_func);
    if ( mode == wxCOMPOSITION_INVALID )
    {
        wxFAIL_MSG( wxT("Blitting is not supported with this logical operation.") );
        return false;
    }

    wxRect subrect(source->LogicalToDeviceX(xsrc),
                   source->LogicalToDeviceY(ysrc),
                   source->LogicalToDeviceXRel(srcWidth),
                   source->LogicalToDeviceYRel(srcHeight));
    const wxRect subrectOrig = subrect;
    // clip the subrect down to the size of the source DC
    wxRect clip;
    source->GetSize(&clip.width, &clip.height);
    subrect.Intersect(clip);
    if (subrect.width == 0)
        return true;

    bool retval = true;

    wxCompositionMode formerMode = m_graphicContext->GetCompositionMode();
    if (m_graphicContext->SetCompositionMode(mode))
    {
        wxAntialiasMode formerAa = m_graphicContext->GetAntialiasMode();
        if (mode == wxCOMPOSITION_XOR)
        {
            m_graphicContext->SetAntialiasMode(wxANTIALIAS_NONE);
        }

        if (xsrcMask == -1 && ysrcMask == -1)
        {
            xsrcMask = xsrc;
            ysrcMask = ysrc;
        }

        wxBitmap blit = source->GetAsBitmap( &subrect );

        if ( blit.IsOk() )
        {
            if ( !useMask && blit.GetMask() )
                blit.SetMask(NULL);

            double x = xdest;
            double y = ydest;
            double w = dstWidth;
            double h = dstHeight;
            // adjust dest rect if source rect is clipped
            if (subrect.width != subrectOrig.width || subrect.height != subrectOrig.height)
            {
                x += (subrect.x - subrectOrig.x) / double(subrectOrig.width) * dstWidth;
                y += (subrect.y - subrectOrig.y) / double(subrectOrig.height) * dstHeight;
                w *= double(subrect.width) / subrectOrig.width;
                h *= double(subrect.height) / subrectOrig.height;
            }
            m_graphicContext->DrawBitmap(blit, x, y, w, h);
        }
        else
        {
            wxFAIL_MSG( wxT("Cannot Blit. Unable to get contents of DC as bitmap.") );
            retval = false;
        }

        if (mode == wxCOMPOSITION_XOR)
        {
            m_graphicContext->SetAntialiasMode(formerAa);
        }
    }
    // reset composition
    m_graphicContext->SetCompositionMode(formerMode);

    return retval;
}

void wxGCDCImpl::SetTextBackground( const wxColour &col )
{
    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextBackground - invalid DC") );

    m_textBackgroundColour = col;
}

wxBitmap *wxBrush::GetStipple() const
{
    wxCHECK_MSG( IsOk(), NULL, wxT("invalid brush") );

    return &M_BRUSHDATA->m_stipple;
}

int wxPen::GetWidth() const
{
    wxCHECK_MSG( IsOk(), -1, wxT("invalid pen") );

    return 1;
}

int CSocket::ReadLine ( CString& szDest )
{
    int iSize;

    if ( !IsOk () )
        return -1;

    do
    {
        if ( m_bufferSize > 0 )
        {
            char* p = strchr ( m_buffer, '\n' );
            if ( p && ( p <= ( m_buffer + m_bufferSize ) ) )
            {
                char* p2 = p;
                while ( p2 > m_buffer && ( *p2 == '\n' || *p2 == '\r' ) )
                    *p2-- = '\0';

                size_t len = static_cast < size_t > ( p2 - m_buffer + 1 );
                if ( len > 1 || ( *p2 != '\n' && *p2 != '\r' ) )
                {
                    szDest.assign ( m_buffer, len );
                }

                size_t len2 = static_cast < size_t > ( p - m_buffer );
                assert ( m_bufferSize >= len2 );
                memcpy ( m_buffer, p + 1, m_bufferSize - len2 );
                m_bufferSize -= len2 + 1;
                m_buffer [ m_bufferSize ] = '\0';

                return len2;
            }
        }

        // Llamamos a select para establecer un timeout
        fd_set fds;
        FD_ZERO ( &fds );
        FD_SET ( m_socket, &fds );

        struct timeval* tvTimeout = 0;
        struct timeval __tvTimeout;
        if ( m_uiTimeout > 0 )
        {
            __tvTimeout.tv_sec = m_uiTimeout / 1000;
            __tvTimeout.tv_usec = (m_uiTimeout - ( __tvTimeout.tv_sec * 1000 )) * 1000;
            tvTimeout = &__tvTimeout;
        }

        int nChanged = select ( m_socket + 1, &fds, NULL, NULL, tvTimeout );

        // Comprobamos que todo ha ido bien en el select
        if ( nChanged == -1 )
        {
            m_iErrno = errno;
            m_szError = strerror ( errno );
            InternalClose ( true );
            return -1;
        }
        else if ( nChanged == 0 )
            return 0;
        else
        {
            // Leemos datos desde el socket
            iSize = recv ( m_socket, m_buffer + m_bufferSize, BUFFER_SIZE - m_bufferSize, 0 );

            if ( iSize > 0 )
            {
                m_bufferSize += iSize;
            }
        }
    } while ( iSize > 0 );

    m_iErrno = CPortability::SocketErrno ();
    CPortability::SocketError ( m_iErrno, m_szError );
    InternalClose ( true );

    return -1;
}

void CComponentPlayerController::UpdatePostPhysX(float _fDeltaTime)
{
  assert(IsOk());
  
  CComponentVida*   l_pComponentVida   = GetEntity()->GetComponent<CComponentVida>();
  CComponentEnergy* l_pComponentEnergy = GetEntity()->GetComponent<CComponentEnergy>();

  const vector<CMaterial*>& l_vMaterials = m_pAnimatedModel->GetAnimatedInstanceModel()->GetAnimatedCoreModel()->GetMaterials();

  CRenderer *l_pRenderer = CORE->GetRenderer();

  CPostSceneRendererStep* l_pDamage = l_pRenderer->GetPostSceneRendererStep("damage_gui");
  CPostSceneRendererStep* l_pBlood  = l_pRenderer->GetPostSceneRendererStep("blood_gui");

  float l_fHP = 100.f;
  float l_fMaxHP = 100.f;
  
  if(l_pComponentVida && !m_bGodMode)
  {
    l_fHP = l_pComponentVida->GetHP();
    l_fMaxHP = l_pComponentVida->GetMaxHP();
  }
  
  float l_fEnergy = 100.f;
  float l_fMaxEnergy = 100.f;

  if(l_pComponentEnergy && !m_bGodMode)
  {
    l_fEnergy = l_pComponentEnergy->GetEnergy();
    l_fMaxEnergy = l_pComponentEnergy->GetMaxEnergy();
  }
  
  float l_fMin = 0.0f;
  float l_fMax = 1.0f;
  float l_fGlowIntensity = l_fEnergy/l_fMaxEnergy * (l_fMax - l_fMin) + l_fMin;

  vector<CMaterial*>::const_iterator l_itMaterial = l_vMaterials.begin();

  while(l_itMaterial != l_vMaterials.end())
  {
    (*l_itMaterial)->SetGlowIntensity(l_fGlowIntensity);
    ++l_itMaterial;
  }

  if(l_pDamage)
  {
    if(l_fHP < l_fMaxHP)
    {
      float l_fDamageAlpha = 1.0f - (l_fHP/l_fMaxHP);
      l_fDamageAlpha = l_fDamageAlpha + abs(l_fDamageAlpha*0.8f*sinf(5.0f*m_fBloodTime));
      if(l_fDamageAlpha > 1.0f)
      {
        l_fDamageAlpha = 1.0f;
      }

      l_pRenderer->ActivateRenderPath("damage_gui");
      l_pDamage->SetAlpha(l_fDamageAlpha);
    }else{
      l_pRenderer->DeactivateRenderPath("damage_gui");
    }
  }

  if(m_fBloodFadeOutTime > 0.0f)
  {
    l_pBlood->SetAlpha(m_fBloodFadeOutTime/(float)BLOOD_FADEOUT_TIME);
    l_pRenderer->ActivateRenderPath("blood_gui");

    m_fBloodFadeOutTime -= _fDeltaTime;

  }else{
    l_pRenderer->DeactivateRenderPath("blood_gui");
    m_fBloodFadeOutTime = 0.0f;
  }

  m_fBloodTime += _fDeltaTime;


  CPostSceneRendererStep* l_pShockWave = l_pRenderer->GetPostSceneRendererStep("shock_wave");
  
  if(m_fForceTime < 3.f)
  {
    m_fForceTime += _fDeltaTime;

    l_pShockWave->SetTime(m_fForceTime*SHOCK_WAVE_VELOCITY);

    if(m_fForceTime > 3.0f)
    {
      l_pRenderer->DeactivateRenderPath("shock_wave");
    }
  }

  if(l_fHP > 0.0f && l_fHP < l_fMaxHP)
  {
    float l_fDamageVolume = 1.0f - (l_fHP/l_fMaxHP);

    if(l_fDamageVolume > 1.0f)
    {
      l_fDamageVolume = 1.0f;
    }

//.........这里部分代码省略.........

wxFontEncoding wxFont::GetEncoding() const
{
    wxCHECK_MSG( IsOk(), wxFONTENCODING_DEFAULT, wxT("invalid font") );

    return M_FONTDATA->GetEncoding();
}

void wxOverlayImpl::Clear(wxWindowDC* dc)
{
    wxASSERT_MSG( IsOk() , _("You cannot Clear an overlay that is not inited") );
    CGRect box  = CGRectMake( m_x - 1, m_y - 1 , m_width + 2 , m_height + 2 );
    CGContextClearRect( m_overlayContext, box );
}

size_t wxZlibInputStream::OnSysRead(void *buffer, size_t size)
{
  wxASSERT_MSG(m_inflate && m_z_buffer, wxT("Inflate stream not open"));

  if (!m_inflate || !m_z_buffer)
    m_lasterror = wxSTREAM_READ_ERROR;
  if (!IsOk() || !size)
    return 0;

  int err = Z_OK;
  m_inflate->next_out = (unsigned char *)buffer;
  m_inflate->avail_out = size;

#if defined(__INTEL_COMPILER) && 1 /* VDM auto patch */
#   pragma ivdep
#   pragma swp
#   pragma unroll
#   pragma prefetch
#   if 0
#       pragma simd noassert
#   endif
#endif /* VDM auto patch */
  while (err == Z_OK && m_inflate->avail_out > 0) {
    if (m_inflate->avail_in == 0 && m_parent_i_stream->IsOk()) {
      m_parent_i_stream->Read(m_z_buffer, m_z_size);
      m_inflate->next_in = m_z_buffer;
      m_inflate->avail_in = m_parent_i_stream->LastRead();
    }
    err = inflate(m_inflate, Z_SYNC_FLUSH);
  }

  switch (err) {
    case Z_OK:
        break;

    case Z_STREAM_END:
      if (m_inflate->avail_out) {
        // Unread any data taken from past the end of the deflate stream, so that
        // any additional data can be read from the underlying stream (the crc
        // in a gzip for example)
        if (m_inflate->avail_in) {
          m_parent_i_stream->Reset();
          m_parent_i_stream->Ungetch(m_inflate->next_in, m_inflate->avail_in);
          m_inflate->avail_in = 0;
        }
        m_lasterror = wxSTREAM_EOF;
      }
      break;

    case Z_BUF_ERROR:
      // Indicates that zlib was expecting more data, but the parent stream
      // has none. Other than Eof the error will have been already reported
      // by the parent strean,
      m_lasterror = wxSTREAM_READ_ERROR;
      if (m_parent_i_stream->Eof())
      {
          wxLogError(_("Can't read inflate stream: unexpected EOF in underlying stream."));
      }
      break;

    default:
      wxString msg(m_inflate->msg, *wxConvCurrent);
      if (!msg)
        msg = wxString::Format(_("zlib error %d"), err);
      wxLogError(_("Can't read from inflate stream: %s"), msg.c_str());
      m_lasterror = wxSTREAM_READ_ERROR;
  }

  size -= m_inflate->avail_out;
  m_pos += size;
  return size;
}