C++ GRSetDrawMode函數代碼示例

void SCH_BITMAP::Draw( EDA_DRAW_PANEL* aPanel, wxDC* aDC, const wxPoint& aOffset,
                       GR_DRAWMODE aDrawMode, COLOR4D aColor )
{
    wxPoint pos = m_pos + aOffset;

    if( aColor == COLOR4D::UNSPECIFIED )    // Use normal drawing function
    {
        // https://bugs.launchpad.net/kicad/+bug/1529163
        // "Moving images in eeschema on OS X uses
        //  wrong position and shows image flipped"
        //
        // Original fix was to only GRSetDrawMode if aColor >= 0, but this made
        // moving SCH_BITMAP work poorly on other platforms.
#ifndef __WXMAC__
        GRSetDrawMode( aDC, aDrawMode );
#endif

        m_image->DrawBitmap( aPanel, aDC, pos );
    }
    else    // draws bounding box only (used to move items)
    {
        GRSetDrawMode( aDC, aDrawMode );
        // To draw the rect, pos is the upper left corner position
        wxSize size = m_image->GetSize();
        pos.x -= size.x / 2;
        pos.y -= size.y / 2;
        GRRect( aPanel->GetClipBox(), aDC, pos.x, pos.y,
                pos.x + size.x, pos.y + size.y, 0, aColor );
    }
}

static void DrawMovingBlockOutlines(WinEDA_DrawPanel * panel, wxDC * DC,
	bool erase )
/************************************************************************/
/* Retrace le contour du block de recherche de structures
	L'ensemble du block suit le curseur
*/
{
DrawBlockStruct * PtBlock;
DrawPickedStruct *PickedList;
BASE_SCREEN * screen = panel->m_Parent->GetScreen();

	PtBlock = &panel->GetScreen()->BlockLocate;
	GRSetDrawMode(DC, g_XorMode);

	/* Effacement ancien cadre */
	if( erase && PtBlock->m_BlockDrawStruct)
	{
		PtBlock->Offset(PtBlock->m_MoveVector);
		PtBlock->Draw(panel, DC);
		PtBlock->Offset( -PtBlock->m_MoveVector.x, -PtBlock->m_MoveVector.y);

		/* Effacement ancien affichage */
		if(PtBlock->m_BlockDrawStruct->m_StructType == DRAW_PICK_ITEM_STRUCT_TYPE)
		{
			PickedList  = (DrawPickedStruct *) PtBlock->m_BlockDrawStruct;
			while (PickedList)
			{
				DrawStructsInGhost(panel, DC, PickedList->m_PickedStruct, PtBlock->m_MoveVector.x, PtBlock->m_MoveVector.y);
				PickedList = (DrawPickedStruct *)PickedList->Pnext;
			}
		}
		else DrawStructsInGhost(panel, DC, PtBlock->m_BlockDrawStruct, PtBlock->m_MoveVector.x, PtBlock->m_MoveVector.y);
	}

	/* Redessin nouvel affichage */

	PtBlock->m_MoveVector.x = screen->m_Curseur.x - PtBlock->m_BlockLastCursorPosition.x;
	PtBlock->m_MoveVector.y = screen->m_Curseur.y - PtBlock->m_BlockLastCursorPosition.y;

	GRSetDrawMode(DC, g_XorMode);
	PtBlock->Offset(PtBlock->m_MoveVector);
	PtBlock->Draw(panel, DC);
	PtBlock->Offset( -PtBlock->m_MoveVector.x, -PtBlock->m_MoveVector.y);

	if(PtBlock->m_BlockDrawStruct )
	{
		if(PtBlock->m_BlockDrawStruct->m_StructType == DRAW_PICK_ITEM_STRUCT_TYPE)
		{
		PickedList  = (DrawPickedStruct *) PtBlock->m_BlockDrawStruct;
		while (PickedList)
			{
			DrawStructsInGhost(panel, DC, PickedList->m_PickedStruct, PtBlock->m_MoveVector.x, PtBlock->m_MoveVector.y);
			PickedList = (DrawPickedStruct *)PickedList->Pnext;
			}
		}
		else DrawStructsInGhost(panel, DC, PtBlock->m_BlockDrawStruct, PtBlock->m_MoveVector.x, PtBlock->m_MoveVector.y);
	}
}

void WinEDA_LibeditFrame::EditField(wxDC * DC, LibDrawField *Field)
/******************************************************************/
{
wxString Text;
int color;
wxString title = wxT("Text:");

	if( Field == NULL) return;

	switch (Field->m_FieldId)
	{
		case REFERENCE:
			title = wxT("Reference:");
			color = ReturnLayerColor(LAYER_REFERENCEPART);
			break;

		case VALUE:
			title = wxT("Value:");
			color = ReturnLayerColor(LAYER_VALUEPART);
			break;

		default:
			color = ReturnLayerColor(LAYER_FIELDS);
			break;
	}

	if( Field->m_Attributs & TEXT_NO_VISIBLE ) color = DARKGRAY;

	Text = Field->m_Text;
	Get_Message(title,Text, this);
	Text.Replace( wxT(" ") , wxT("_") );

	GRSetDrawMode(DC, g_XorMode);
	DrawGraphicText(DrawPanel, DC, wxPoint(Field->m_Pos.x, - Field->m_Pos.y),
					color, Field->m_Text,
					Field->m_Orient ? TEXT_ORIENT_VERT : TEXT_ORIENT_HORIZ,
					Field->m_Size,
					Field->m_HJustify, Field->m_VJustify);

	if( ! Text.IsEmpty() )
	{
		SaveCopyInUndoList();
		Field->m_Text = Text;
	}
	else DisplayError(this, _("No new text: no change") );

	if( Field->m_Flags == 0 ) GRSetDrawMode(DC, GR_DEFAULT_DRAWMODE);

	DrawGraphicText(DrawPanel, DC, wxPoint(Field->m_Pos.x, - Field->m_Pos.y),
					color, Field->m_Text,
					Field->m_Orient ? TEXT_ORIENT_VERT : TEXT_ORIENT_HORIZ,
					Field->m_Size,
					Field->m_HJustify, Field->m_VJustify);

	m_CurrentScreen->SetModify();

	if ( Field->m_FieldId == VALUE ) ReCreateHToolbar();
}

/* Draw PCB_TARGET object: 2 segments + 1 circle
 * The circle radius is half the radius of the target
 * 2 lines have length the diameter of the target
 */
void PCB_TARGET::Draw( EDA_DRAW_PANEL* panel, wxDC* DC, GR_DRAWMODE mode_color,
                       const wxPoint& offset )
{
    int radius, ox, oy, width;
    int dx1, dx2, dy1, dy2;

    ox = m_Pos.x + offset.x;
    oy = m_Pos.y + offset.y;

    BOARD * brd =  GetBoard( );

    if( brd->IsLayerVisible( m_Layer ) == false )
        return;

    auto frame = static_cast<PCB_EDIT_FRAME*> ( panel->GetParent() );
    auto gcolor = frame->Settings().Colors().GetLayerColor( m_Layer );

    GRSetDrawMode( DC, mode_color );
    auto displ_opts = (PCB_DISPLAY_OPTIONS*)( panel->GetDisplayOptions() );
    bool filled = displ_opts ? displ_opts->m_DisplayDrawItemsFill : FILLED;
    width   = m_Width;

    radius = m_Size / 3;

    if( GetShape() )   // shape X
        radius = m_Size / 2;

    if( filled )
        GRCircle( panel->GetClipBox(), DC, ox, oy, radius, width, gcolor );
    else
    {
        GRCircle( panel->GetClipBox(), DC, ox, oy, radius + (width / 2), gcolor );
        GRCircle( panel->GetClipBox(), DC, ox, oy, radius - (width / 2), gcolor );
    }


    radius = m_Size / 2;
    dx1   = radius;
    dy1   = 0;
    dx2   = 0;
    dy2   = radius;

    if( GetShape() )   // shape X
    {
        dx1 = dy1 = radius;
        dx2 = dx1;
        dy2 = -dy1;
    }

    if( filled )
    {
        GRLine( panel->GetClipBox(), DC, ox - dx1, oy - dy1, ox + dx1, oy + dy1, width, gcolor );
        GRLine( panel->GetClipBox(), DC, ox - dx2, oy - dy2, ox + dx2, oy + dy2, width, gcolor );
    }
    else
    {
        GRCSegm( panel->GetClipBox(), DC, ox - dx1, oy - dy1, ox + dx1, oy + dy1, width, gcolor );
        GRCSegm( panel->GetClipBox(), DC, ox - dx2, oy - dy2, ox + dx2, oy + dy2, width, gcolor );
    }
}

void EDA_DRAW_PANEL::DrawBackGround( wxDC* DC )
{
    GRSetDrawMode( DC, GR_COPY );

    if( GetParent()->IsGridVisible() )
        DrawGrid( DC );

    // Draw axis
    if( GetParent()->GetShowAxis() )
    {
        COLOR4D axis_color = COLOR4D( BLUE );
        wxSize  pageSize = GetParent()->GetPageSizeIU();

        // Draw the Y axis
        GRLine( &m_ClipBox, DC, 0, -pageSize.y, 0, pageSize.y, 0, axis_color );

        // Draw the X axis
        GRLine( &m_ClipBox, DC, -pageSize.x, 0, pageSize.x, 0, 0, axis_color );
    }

    if( GetParent()->GetShowOriginAxis() )
        DrawAuxiliaryAxis( DC, GR_COPY );

    if( GetParent()->GetShowGridAxis() )
        DrawGridAxis( DC, GR_COPY, GetParent()->GetGridOrigin() );
}

void SCH_BUS_ENTRY_BASE::Draw( EDA_DRAW_PANEL* aPanel, wxDC* aDC, const wxPoint& aOffset,
                          GR_DRAWMODE aDrawMode, COLOR4D aColor )
{
    COLOR4D color;
    EDA_RECT* clipbox = aPanel->GetClipBox();

    if( aColor != COLOR4D::UNSPECIFIED )
        color = aColor;
    else
        color = GetLayerColor( GetState( BRIGHTENED ) ? LAYER_BRIGHTENED : m_Layer );

    GRSetDrawMode( aDC, aDrawMode );

    GRLine( clipbox, aDC, m_pos.x + aOffset.x, m_pos.y + aOffset.y,
            m_End().x + aOffset.x, m_End().y + aOffset.y, GetPenSize(), color );


    // Draw pin targets if part is being dragged
    bool dragging = aPanel->GetScreen()->GetCurItem() == this && aPanel->IsMouseCaptured();

    if( m_isDanglingStart || dragging )
    {
        GRCircle( clipbox, aDC, m_pos.x + aOffset.x, m_pos.y + aOffset.y,
                TARGET_BUSENTRY_RADIUS, 0, color );
    }

    if( m_isDanglingEnd || dragging )
    {
        GRCircle( clipbox, aDC, m_End().x + aOffset.x, m_End().y + aOffset.y,
                TARGET_BUSENTRY_RADIUS, 0, color );
    }
}

static void Polyline_in_Ghost(WinEDA_DrawPanel * panel, wxDC * DC, bool erase)
/*****************************************************************************/
/*  Dessin du du Polyline Fantome lors des deplacements du curseur
*/
{
DrawPolylineStruct * NewPoly =
		(DrawPolylineStruct *)panel->m_Parent->GetScreen()->m_CurrentItem;
int color;
wxPoint endpos;

	endpos = panel->m_Parent->GetScreen()->m_Curseur;
	color = ReturnLayerColor(NewPoly->m_Layer);

	GRSetDrawMode(DC, XOR_MODE);

	if( g_HVLines )
		{
		/* Coerce the line to vertical or horizontal one: */
		if (ABS(endpos.x - NewPoly->m_Points[NewPoly->m_NumOfPoints * 2 - 2]) <
			 ABS(endpos.y - NewPoly->m_Points[NewPoly->m_NumOfPoints * 2 - 1]))
			endpos.x = NewPoly->m_Points[NewPoly->m_NumOfPoints * 2 - 2];
		else
			endpos.y = NewPoly->m_Points[NewPoly->m_NumOfPoints * 2 - 1];
		}

	NewPoly->m_NumOfPoints++;
	if( erase )
		RedrawOneStruct(panel,DC, NewPoly, XOR_MODE, color);

	NewPoly->m_Points[NewPoly->m_NumOfPoints * 2 - 2] = endpos.x;
	NewPoly->m_Points[NewPoly->m_NumOfPoints * 2 - 1] = endpos.y;
	RedrawOneStruct(panel,DC, NewPoly, XOR_MODE, color);
	NewPoly->m_NumOfPoints--;
}

void WinEDA_BasePcbFrame::trace_ratsnest_pad(wxDC * DC)
/*******************************************************/
/*
 affiche le "chevelu" d'un pad lors des trace de segments de piste
*/
{
int * pt_coord;
int ii;
int refX, refY;

	if((m_Pcb->m_Status_Pcb & LISTE_CHEVELU_OK) == 0) return;
	if( nb_local_chevelu == 0 ) return;
	if ( local_liste_chevelu == NULL ) return;

	pt_coord = (int*) local_liste_chevelu;
	refX = *pt_coord; pt_coord++;
	refY = *pt_coord; pt_coord++;

	GRSetDrawMode(DC, GR_XOR);
	for( ii = 0; ii < nb_local_chevelu; ii++)
		{
		if ( ii >= g_MaxLinksShowed ) break;
		GRLine(&DrawPanel->m_ClipBox, DC, refX, refY, *pt_coord, *(pt_coord+1), YELLOW);
		pt_coord += 2;
		}
}

void EDA_DRAW_PANEL::DrawGridAxis( wxDC* aDC, GR_DRAWMODE aDrawMode, const wxPoint& aGridOrigin )
{
    if( !GetParent()->GetShowGridAxis() || ( !aGridOrigin.x && !aGridOrigin.y ) )
        return;

    COLOR4D color = GetParent()->GetGridColor();

    GRSetDrawMode( aDC, aDrawMode );

#if DRAW_AXIS_AS_LINES
    wxSize      pageSize = GetParent()->GetPageSizeIU();
    // Draw the Y axis
    GRLine( &m_ClipBox, aDC, aGridOrigin.x, -pageSize.y,
            aGridOrigin.x, pageSize.y, 0, color );

    // Draw the X axis
    GRLine( &m_ClipBox, aDC, -pageSize.x, aGridOrigin.y,
            pageSize.x, aGridOrigin.y, 0, color );
#else
    int radius = aDC->DeviceToLogicalXRel( AXIS_SIZE_IN_PIXELS );
    int linewidth = aDC->DeviceToLogicalXRel( 1 );

    GRSetColorPen( aDC, GetParent()->GetGridColor(), linewidth );

    GRLine( &m_ClipBox, aDC, aGridOrigin.x-radius, aGridOrigin.y-radius,
            aGridOrigin.x+radius, aGridOrigin.y+radius, 0, color );

    // Draw the X shape
    GRLine( &m_ClipBox, aDC, aGridOrigin.x+radius, aGridOrigin.y-radius,
            aGridOrigin.x-radius, aGridOrigin.y+radius, 0, color );

    GRCircle( &m_ClipBox, aDC, aGridOrigin, radius, linewidth, color );
#endif
}

void EDA_DRAW_PANEL::DrawAuxiliaryAxis( wxDC* aDC, GR_DRAWMODE aDrawMode )
{
    wxPoint origin = GetParent()->GetAuxOrigin();

    if( origin == wxPoint( 0, 0 ) )
        return;

    EDA_COLOR_T color = DARKRED;
    wxSize  pageSize = GetParent()->GetPageSizeIU();

    GRSetDrawMode( aDC, aDrawMode );

    // Draw the Y axis
    GRDashedLine( &m_ClipBox, aDC,
                  origin.x,
                  -pageSize.y,
                  origin.x,
                  pageSize.y,
                  0, color );

    // Draw the X axis
    GRDashedLine( &m_ClipBox, aDC,
                  -pageSize.x,
                  origin.y,
                  pageSize.x,
                  origin.y,
                  0, color );
}

void FOOTPRINT_EDIT_FRAME::RedrawActiveWindow( wxDC* DC, bool EraseBg )
{
    PCB_SCREEN* screen = GetScreen();

    if( !GetBoard() || !screen )
        return;

    GRSetDrawMode( DC, GR_COPY );

    m_canvas->DrawBackGround( DC );
    DrawWorkSheet( DC, screen, 0, IU_PER_MILS, wxEmptyString );

    // Redraw the footprints
    for( MODULE* module = GetBoard()->m_Modules; module; module = module->Next() )
        module->Draw( m_canvas, DC, GR_OR | GR_ALLOW_HIGHCONTRAST );

#ifdef USE_WX_OVERLAY

    if( IsShown() )
    {
        m_overlay.Reset();
        wxDCOverlay overlaydc( m_overlay, (wxWindowDC*) DC );
        overlaydc.Clear();
    }

#endif

    if( m_canvas->IsMouseCaptured() )
        m_canvas->CallMouseCapture( DC, wxDefaultPosition, false );

    // Redraw the cursor
    m_canvas->DrawCrossHair( DC );
}

void SCH_TEXT::Draw( EDA_DRAW_PANEL* panel, wxDC* DC, const wxPoint& aOffset,
                     GR_DRAWMODE DrawMode, EDA_COLOR_T Color )
{
    EDA_COLOR_T color;
    int         linewidth = ( m_Thickness == 0 ) ? GetDefaultLineThickness() : m_Thickness;

    linewidth = Clamp_Text_PenSize( linewidth, m_Size, m_Bold );

    if( Color >= 0 )
        color = Color;
    else
        color = ReturnLayerColor( m_Layer );

    GRSetDrawMode( DC, DrawMode );

    wxPoint text_offset = aOffset + GetSchematicTextOffset();
    EXCHG( linewidth, m_Thickness );            // Set the minimum width
    EDA_TEXT::Draw( panel, DC, text_offset, color, DrawMode, FILLED, UNSPECIFIED_COLOR );
    EXCHG( linewidth, m_Thickness );            // set initial value

    if( m_isDangling )
        DrawDanglingSymbol( panel, DC, m_Pos + aOffset, color );

    // Enable these line to draw the bounding box (debug tests purposes only)
#if 0
    {
        EDA_RECT BoundaryBox = GetBoundingBox();
        GRRect( panel->GetClipBox(), DC, BoundaryBox, 0, BROWN );
    }
#endif
}

void BASE_SCREEN::Trace_Curseur(WinEDA_DrawPanel * panel, wxDC * DC)
/*******************************************************************/
/*
 Trace Le curseur sur la zone PCB , se deplacant sur la grille
*/
{
int color = WHITE;
	
	GRSetDrawMode(DC, GR_XOR);
	if( g_CursorShape == 1 )	/* Trace d'un reticule */
		{
		int dx = panel->m_ClipBox.GetWidth() * GetZoom();
		int dy = panel->m_ClipBox.GetHeight() * GetZoom();
		GRLine(&panel->m_ClipBox, DC, m_Curseur.x - dx, m_Curseur.y,
							m_Curseur.x + dx, m_Curseur.y, color); // axe Y
		GRLine(&panel->m_ClipBox, DC, m_Curseur.x, m_Curseur.y - dx,
				m_Curseur.x, m_Curseur.y + dy, color);  // axe X
		}

	else
		{
		int len = CURSOR_SIZE * GetZoom();
		GRLine(&panel->m_ClipBox, DC, m_Curseur.x - len, m_Curseur.y,
				m_Curseur.x + len, m_Curseur.y, color);
		GRLine(&panel->m_ClipBox, DC, m_Curseur.x, m_Curseur.y - len,
				m_Curseur.x, m_Curseur.y + len, color);
		}
}

void DrawAndSizingBlockOutlines(WinEDA_DrawPanel * panel, wxDC * DC, bool erase )
/********************************************************************************/
/* Redraw the outlines of the block which shows the search area for block commands
	The first point of the rectangle showing the area is initialised
	by InitBlockLocateDatas().
	The other point of the rectangle is the mouse cursor
 */
{
    DrawBlockStruct * PtBlock;

    PtBlock = &panel->GetScreen()->BlockLocate;

    PtBlock->m_MoveVector = wxPoint(0,0);

    GRSetDrawMode(DC, g_XorMode);

    /* Effacement ancien cadre */
    if( erase ) PtBlock->Draw(panel, DC);

    PtBlock->m_BlockLastCursorPosition = panel->GetScreen()->m_Curseur;
    PtBlock->SetEnd(panel->GetScreen()->m_Curseur);

    PtBlock->Draw(panel, DC);

    if ( PtBlock->m_State == STATE_BLOCK_INIT )
    {
        if ( PtBlock->GetWidth() || PtBlock->GetHeight() )
            /* 2ieme point existant: le rectangle n'est pas de surface nulle */
            PtBlock->m_State = STATE_BLOCK_END;
    }
}

void WinEDA_PcbFrame::RedrawActiveWindow(wxDC * DC, bool EraseBg)
/****************************************************************/
/* Trace le PCB, et les elements complementaires ( axes, grille .. )
 pour l'ecran actif et ses sous ecran
*/
{
PCB_SCREEN * Screen = GetScreen();

	if ( ! m_Pcb || ! Screen ) return;

	ActiveScreen = GetScreen();
	GRSetDrawMode(DC, GR_COPY);

	if ( EraseBg ) DrawPanel->EraseScreen(DC);

	DrawPanel->DrawBackGround(DC);

	Trace_Pcb(DC, GR_OR);
	TraceWorkSheet(DC, GetScreen());
	Affiche_Status_Box();

	/* Reaffichage des curseurs */
	for( Screen = GetScreen(); Screen != NULL; Screen = Screen->Next() )
	{
		if( m_CurrentScreen->ManageCurseur )
			m_CurrentScreen->ManageCurseur(DrawPanel, DC, FALSE);
		Screen->Trace_Curseur(DrawPanel, DC);
	}
}