Introduction of Graphics Abstraction Layer based rendering for pcbnew.

New classes:
    - VIEW - represents view that is seen by user, takes care of layer ordering & visibility and how it is displayed (which location, how much zoomed, etc.)
    - VIEW_ITEM - Base class for every item that can be displayed on VIEW (the biggest change is that now it may be necessary to override ViewBBox & ViewGetLayers method for derived classes).
    - EDA_DRAW_PANEL_GAL - Inherits after EDA_DRAW_PANEL, displays VIEW output, right now it is not editable (in opposite to usual EDA_DRAW_PANEL).
    - GAL/OPENGL_GAL/CAIRO_GAL - Base Graphics Abstraction Layer class + two different flavours (Cairo is not fully supported yet), that offers methods to draw primitives using different libraries.
    - WX_VIEW_CONTROLS - Controller for VIEW, handles user events, allows zooming, panning, etc.
    - PAINTER/PCB_PAINTER - Classes that uses GAL interface to draw items (as you may have already guessed - PCB_PAINTER is a class for drawing PCB specific object, PAINTER is an abstract class). Its methods are invoked by VIEW, when an item has to be drawn. To display a new type of item - you need to implement draw(ITEM_TYPE*) method that draws it using GAL methods.
    - STROKE_FONT - Implements stroke font drawing using GAL methods.
                          
Most important changes to Kicad original code:
    * EDA_ITEM now inherits from VIEW_ITEM, which is a base class for all drawable objects.
    * EDA_DRAW_FRAME contains both usual EDA_DRAW_PANEL and new EDA_DRAW_PANEL_GAL, that can be switched anytime.
    * There are some new layers for displaying multilayer pads, vias & pads holes (these are not shown yet on the right sidebar in pcbnew)
    * Display order of layers is different than in previous versions (if you are curious - you may check m_galLayerOrder@pcbnew/basepcbframe.cpp). Preserving usual order would result in not very natural display, such as showing silkscreen texts on the bottom.
    * Introduced new hotkey (Alt+F12) and new menu option (View->Switch canvas) for switching canvas during runtime.
    * Some of classes (mostly derived from BOARD_ITEM) now includes ViewBBox & ViewGetLayers methods.
    * Removed tools/class_painter.h, as now it is extended and included in source code.
                         
Build changes:
    * GAL-based rendering option is turned on by a new compilation CMake option KICAD_GAL.
    * When compiling with CMake option KICAD_GAL=ON, GLEW and Cairo libraries are required.
    * GAL-related code is compiled into a static library (common/libgal).
    * Build with KICAD_GAL=OFF should not need any new libraries and should come out as a standard version of Kicad
                            
Currently most of items in pcbnew can be displayed using OpenGL (to be done are DIMENSIONS and MARKERS).
More details about GAL can be found in: http://www.ohwr.org/attachments/1884/view-spec.pdf

CMakeLists.txt

@@ -57,6 +57,10 @@ option(KICAD_SCRIPTING_WXPYTHON
     "set this option ON to build wxpython implementation for wx interface building in python and py.shell"
     )
     
+option(KICAD_GAL
+    "set this option ON to build KICAD using Graphics Abstraction Layer as a rendering backend"
+    )
+
 # when option KICAD_SCRIPTING OR KICAD_SCRIPTING_MODULES is enabled:
 # PYTHON_EXECUTABLE can be defined when invoking cmake
 # ( use -DPYTHON_EXECUTABLE=<python path>/python.exe or python2 )
@@ -189,6 +193,10 @@ if(USE_WX_GRAPHICS_CONTEXT)
     add_definitions(-DUSE_WX_GRAPHICS_CONTEXT)
 endif()
 
+if(KICAD_GAL)
+    add_definitions(-DKICAD_GAL)
+endif()
+
 # Allow user to override the default settings for adding images to menu items.  By default
 # images in menu items are enabled on all platforms except OSX.  This can be over ridden by
 # defining -DUSE_IMAGES_IN_MENUS=ON/OFF to force the preferred behavior.
@@ -257,6 +265,20 @@ add_definitions(-DWX_COMPATIBILITY)
 find_package(OpenGL QUIET)
 check_find_package_result(OPENGL_FOUND "OpenGL")
 
+if(KICAD_GAL)
+#####################
+# Find GLEW library #
+#####################
+find_package(GLEW)
+check_find_package_result(GLEW_FOUND "GLEW")
+
+######################
+# Find Cairo library #
+######################
+find_package(Cairo 1.8.1 QUIET)
+check_find_package_result(CAIRO_FOUND "Cairo")
+endif(KICAD_GAL)
+
 ######################
 # Find Boost library #
 ######################

common/CMakeLists.txt

@@ -4,12 +4,29 @@ include_directories(
     ./dialogs
     ./dialog_about
     ${Boost_INCLUDE_DIR}
+    ${CAIRO_INCLUDE_DIR}
     ../3d-viewer
     ../pcbnew
     ../polygon
     ${INC_AFTER}
     )
 
+if(KICAD_GAL)
+set(GAL_SRCS
+    drawpanel_gal.cpp
+    painter.cpp
+    gal/graphics_abstraction_layer.cpp
+    gal/stroke_font.cpp
+    gal/color4d.cpp
+    gal/opengl/opengl_gal.cpp
+    gal/opengl/shader.cpp
+    gal/cairo/cairo_gal.cpp
+    view/wx_view_controls.cpp
+    )
+
+add_library(gal STATIC ${GAL_SRCS})
+endif(KICAD_GAL)
+
 set(COMMON_ABOUT_DLG_SRCS
     dialog_about/AboutDialog_main.cpp
     dialog_about/dialog_about.cpp
@@ -82,6 +99,14 @@ set(COMMON_SRCS
     zoom.cpp
     )
 
+if(KICAD_GAL)
+set(COMMON_SRCS
+	${COMMON_SRCS}
+	view/view.cpp
+	view/view_item.cpp
+    )
+endif(KICAD_GAL)
+
 add_library(common STATIC ${COMMON_SRCS})
 
 set(PCB_COMMON_SRCS
@@ -131,6 +156,12 @@ set(PCB_COMMON_SRCS
     fp_lib_table.cpp
 )
 
+if(KICAD_GAL)
+set(PCB_COMMON_SRCS
+    ${PCB_COMMON_SRCS} 
+    ../pcbnew/pcb_painter.cpp
+    )
+endif(KICAD_GAL)
 
 # add -DPCBNEW to compilation of these PCBNEW sources
 set_source_files_properties( ${PCB_COMMON_SRCS} PROPERTIES

common/base_struct.cpp

@@ -222,6 +222,22 @@ EDA_ITEM& EDA_ITEM::operator=( const EDA_ITEM& aItem )
 }
 
 
+const BOX2I EDA_ITEM::ViewBBox() const
+{
+    // Basic fallback
+    return BOX2I( VECTOR2I( GetBoundingBox().GetOrigin() ),
+                  VECTOR2I( GetBoundingBox().GetSize() ) );
+}
+
+
+void EDA_ITEM::ViewGetLayers( int aLayers[], int& aCount ) const
+{
+    // Basic fallback
+    aCount      = 1;
+    aLayers[0]  = 0;
+}
+
+
 #if defined(DEBUG)
 
 // A function that should have been in wxWidgets

common/drawframe.cpp

@@ -35,6 +35,7 @@
 #include <macros.h>
 #include <id.h>
 #include <class_drawpanel.h>
+#include <class_drawpanel_gal.h>
 #include <class_base_screen.h>
 #include <msgpanel.h>
 #include <wxstruct.h>
@@ -66,6 +67,7 @@ BEGIN_EVENT_TABLE( EDA_DRAW_FRAME, EDA_BASE_FRAME )
     EVT_MENU_OPEN( EDA_DRAW_FRAME::OnMenuOpen )
     EVT_ACTIVATE( EDA_DRAW_FRAME::OnActivate )
     EVT_MENU_RANGE( ID_ZOOM_IN, ID_ZOOM_REDRAW, EDA_DRAW_FRAME::OnZoom )
+    EVT_MENU( ID_SWITCH_CANVAS, EDA_DRAW_FRAME::OnZoom )
     EVT_MENU_RANGE( ID_OFFCENTER_ZOOM_IN, ID_OFFCENTER_ZOOM_OUT, EDA_DRAW_FRAME::OnZoom )
     EVT_MENU_RANGE( ID_POPUP_ZOOM_START_RANGE, ID_POPUP_ZOOM_END_RANGE,
                     EDA_DRAW_FRAME::OnZoom )
@@ -100,6 +102,8 @@ EDA_DRAW_FRAME::EDA_DRAW_FRAME( wxWindow* aParent,
     m_HotkeysZoomAndGridList = NULL;
 
     m_canvas              = NULL;
+    m_galCanvas           = NULL;
+    m_galCanvasActive     = false;
     m_messagePanel        = NULL;
     m_currentScreen       = NULL;
     m_toolId              = ID_NO_TOOL_SELECTED;
@@ -937,3 +941,27 @@ void EDA_DRAW_FRAME::AdjustScrollBars( const wxPoint& aCenterPositionIU )
                              screen->m_ScrollbarPos.x,
                              screen->m_ScrollbarPos.y, noRefresh );
 }
+
+
+void EDA_DRAW_FRAME::UseGalCanvas( bool aEnable )
+{
+    if( !( aEnable ^ m_galCanvasActive ) )
+        return;
+
+    if( aEnable )
+    {
+        m_canvas->Hide();
+        m_galCanvas->Show();
+        m_galCanvas->Raise();
+        m_galCanvas->Refresh();
+    }
+    else
+    {
+        m_galCanvas->Hide();
+        m_canvas->Show();
+        m_canvas->Raise();
+        m_canvas->Refresh();
+    }
+
+    m_galCanvasActive = aEnable;
+}

common/drawpanel.cpp

@@ -34,6 +34,7 @@
 #include <macros.h>
 #include <id.h>
 #include <class_drawpanel.h>
+#include <class_drawpanel_gal.h>
 #include <class_base_screen.h>
 #include <wxstruct.h>
 
@@ -74,6 +75,9 @@ BEGIN_EVENT_TABLE( EDA_DRAW_PANEL, wxScrolledWindow )
     EVT_ERASE_BACKGROUND( EDA_DRAW_PANEL::OnEraseBackground )
     EVT_SCROLLWIN( EDA_DRAW_PANEL::OnScroll )
     EVT_ACTIVATE( EDA_DRAW_PANEL::OnActivate )
+#ifdef KICAD_GAL
+    EVT_SIZE( EDA_DRAW_PANEL::OnSize )
+#endif
     EVT_MENU_RANGE( ID_PAN_UP, ID_PAN_RIGHT, EDA_DRAW_PANEL::OnPan )
 END_EVENT_TABLE()
 
@@ -1377,6 +1381,18 @@ void EDA_DRAW_PANEL::OnPan( wxCommandEvent& event )
 }
 
 
+#ifdef KICAD_GAL
+void EDA_DRAW_PANEL::OnSize( wxSizeEvent& SizeEv )
+{
+    if( GetParent()->GetGalCanvas() != NULL )
+    {
+        GetParent()->GetGalCanvas()->SetPosition( GetPosition() );
+        GetParent()->GetGalCanvas()->SetSize( GetSize() );
+    }
+}
+#endif
+
+
 void EDA_DRAW_PANEL::EndMouseCapture( int id, int cursor, const wxString& title,
                                       bool aCallEndFunc )
 {

common/drawpanel_gal.cpp

+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2013 CERN
+ * @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <wx/wx.h>
+#include <wx/frame.h>
+#include <wx/window.h>
+#include <wx/event.h>
+#include <wx/colour.h>
+#include <wx/filefn.h>
+
+#include <class_drawpanel_gal.h>
+#include <view/view.h>
+#include <view/wx_view_controls.h>
+#include <pcb_painter.h>
+
+#include <gal/graphics_abstraction_layer.h>
+#include <gal/opengl/opengl_gal.h>
+#include <gal/cairo/cairo_gal.h>
+
+#define METRIC_UNIT_LENGTH (1e9)
+
+void EDA_DRAW_PANEL_GAL::onPaint( wxEvent& event )
+{
+    m_gal->BeginDrawing();
+    m_gal->SetBackgroundColor( KiGfx::COLOR4D( 0, 0, 0, 1.0 ) );
+    m_gal->ClearScreen();
+    m_gal->SetGridOrigin( VECTOR2D( 0, 0 ) );
+    m_gal->SetGridOriginMarkerSize( 15 );
+    m_gal->SetGridSize( VECTOR2D( METRIC_UNIT_LENGTH / 10000.0, METRIC_UNIT_LENGTH / 10000.0 ) );
+    m_gal->SetGridDrawThreshold( 10 );
+    m_gal->SetLayerDepth( 0 );
+
+    m_gal->DrawGrid();
+    m_view->Redraw();
+
+    m_gal->EndDrawing();
+    m_gal->Flush();
+}
+
+
+void EDA_DRAW_PANEL_GAL::onSize( wxSizeEvent& aEvent )
+{
+    m_gal->ResizeScreen( aEvent.GetSize().x, aEvent.GetSize().y );
+}
+
+
+EDA_DRAW_PANEL_GAL::EDA_DRAW_PANEL_GAL( wxWindow* aParentWindow, wxWindowID aWindowId,
+                                        const wxPoint& aPosition, const wxSize& aSize,
+                                        GalType aGalType ) :
+    wxWindow( aParentWindow, aWindowId, aPosition, aSize ),
+    m_screenSize( aSize.x, aSize.y ), m_parentFrame( aParentWindow )
+{
+    m_gal   = NULL;
+    m_view  = NULL;
+
+    m_galShaderPath = std::string( ::wxGetCwd().mb_str() ) + "/../../gal/opengl/shader/";
+
+    SwitchBackend( aGalType, false );
+    SetBackgroundStyle( wxBG_STYLE_CUSTOM );
+
+    // Initial display settings
+    m_gal->SetLookAtPoint( VECTOR2D( 0, 0 ) );
+    m_gal->SetZoomFactor( 1.0 );
+    m_gal->ComputeWorldScreenMatrix();
+
+    m_view = new KiGfx::VIEW( true );
+    m_view->SetGAL( m_gal );
+
+    // View uses layers to display EDA_ITEMs (item may be displayed on several layers, for example
+    // pad may be shown on pad, pad hole nad solder paste layers). There are usual copper layers
+    // (eg. F.Cu, B.Cu, internal and so on) and layers for displaying objects such as texts,
+    // silkscreen, pads, vias, etc.
+    for( int i = 0; i < TOTAL_LAYER_COUNT; i++ )
+    {
+        m_view->AddLayer( i );
+    }
+
+    m_viewControls = new KiGfx::WX_VIEW_CONTROLS( m_view, this );
+
+    m_painter = new KiGfx::PCB_PAINTER( m_gal );
+    m_view->SetPainter( m_painter );
+
+    // FIXME Cairo needs this to be uncommented to remove blinking on refreshing
+    // Connect( wxEVT_PAINT, wxEventHandler( EDA_DRAW_PANEL_GAL::onPaint ), NULL, this );
+    Connect(KiGfx::EVT_GAL_REDRAW, wxEventHandler( EDA_DRAW_PANEL_GAL::onPaint ), NULL, this );
+    Connect(wxEVT_SIZE, wxSizeEventHandler( EDA_DRAW_PANEL_GAL::onSize ), NULL, this );
+}
+
+
+EDA_DRAW_PANEL_GAL::~EDA_DRAW_PANEL_GAL()
+{
+    if( m_painter )
+        delete m_painter;
+
+    if( m_viewControls )
+        delete m_viewControls;
+
+    if( m_view )
+        delete m_view;
+
+    if( m_gal )
+        delete m_gal;
+}
+
+
+void EDA_DRAW_PANEL_GAL::SwitchBackend( GalType aGalType, bool aUseShaders )
+{
+    if( m_gal )
+        delete m_gal;
+
+    switch( aGalType )
+    {
+    case GAL_TYPE_OPENGL:
+        m_gal = new KiGfx::OPENGL_GAL( this, this, this, aUseShaders );
+        static_cast<KiGfx::OPENGL_GAL*> (m_gal)->SetShaderPath( m_galShaderPath );
+        break;
+
+    case GAL_TYPE_CAIRO:
+        m_gal = new KiGfx::CAIRO_GAL( this, this, this );
+        break;
+    }
+
+    m_gal->SetWorldUnitLength( 1.0 / METRIC_UNIT_LENGTH * 2.54 );   // 1 inch in nanometers
+    m_gal->SetScreenDPI( 106 );                                     // Display resolution setting
+    m_gal->ComputeWorldScreenMatrix();
+
+    if( m_view )
+        m_view->SetGAL( m_gal );
+}

common/gal/graphics_abstraction_layer.cpp

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
+ * Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
+ *
+ * Graphics Abstraction Layer (GAL) - base class
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <wx/log.h>
+
+#include <gal/graphics_abstraction_layer.h>
+#include <gal/definitions.h>
+#include <gal/color4d.h>
+
+
+using namespace KiGfx;
+
+const wxEventType KiGfx::EVT_GAL_REDRAW = wxNewEventType();
+
+GAL::GAL()
+{
+    // Set the default values for the internal variables
+    SetIsFill( false );
+    SetIsStroke( true );
+    SetLineJoin( LINE_JOIN_ROUND );
+    SetLineCap( LINE_CAP_ROUND );
+    SetIsCursorEnabled( false );
+    SetZoomFactor( 1.0 );
+    SetFillColor( COLOR4D( 0.0, 0.0, 0.0, 0.0 ) );
+    SetStrokeColor( COLOR4D( 1.0, 1.0, 1.0, 1.0 ) );
+    SetGridColor( COLOR4D( 1, 1, 1, 0.1 ) );
+    SetCoarseGrid( 5 );
+    SetLineWidth( 1.0 );
+    SetDepthRange( VECTOR2D( -2048, 2047 ) );
+}
+
+
+GAL::~GAL()
+{
+}
+
+
+void GAL::DrawGrid()
+{
+    // The grid consists of lines
+    // For the drawing the start points, end points and increments have to be calculated in world coordinates
+    VECTOR2D    screenStartPoint( 0, 0 );
+    VECTOR2D    screenEndPoint( screenSize.x, screenSize.y );
+    MATRIX3x3D  inverseMatrix   = worldScreenMatrix.Inverse();
+    VECTOR2D    worldStartPoint = inverseMatrix * screenStartPoint;
+    VECTOR2D    worldEndPoint   = inverseMatrix * screenEndPoint;
+
+    // Compute grid variables
+    int gridStartX = round( worldStartPoint.x / gridSize.x );
+    int gridEndX = round( worldEndPoint.x / gridSize.x );
+    int gridStartY = round( worldStartPoint.y / gridSize.y );
+    int gridEndY = round( worldEndPoint.y / gridSize.y );
+
+    int gridScreenSizeDense  = round( gridSize.x * worldScale );
+    int gridScreenSizeCoarse = round( gridSize.x * (double) gridTick * worldScale );
+
+    // Swap the coordinates, if they have not the right order
+    SWAP( gridEndX, <, gridStartX );
+    SWAP( gridEndY, <, gridStartY );
+
+    // Correct the index, else some lines are not correctly painted
+    gridStartX  -= 1;
+    gridStartY  -= 1;
+    gridEndX    += 1;
+    gridEndY    += 1;
+
+    double  savedLineWidth  = GetLineWidth();
+    COLOR4D savedColor      = GetStrokeColor();
+
+    // Compute the line width of the grid
+    ComputeWorldScale();
+    double  width = gridLineWidth / worldScale;
+    double  doubleWidth = 2 * width;
+
+    // Set line width & color
+    SetLineWidth( width );
+
+    double origSize = (double) gridOriginMarkerSize / worldScale;
+
+    SetStrokeColor( COLOR4D( 1.0, 1.0, 1.0, 1.0 ) );
+    SetIsFill( false );
+    DrawLine( gridOrigin + VECTOR2D( -origSize, -origSize ), gridOrigin + VECTOR2D( origSize, origSize ) );
+    DrawLine( gridOrigin + VECTOR2D( -origSize, origSize ),  gridOrigin + VECTOR2D( origSize, -origSize ) );
+    DrawCircle( gridOrigin, origSize * 0.7 );
+
+    SetStrokeColor( gridColor );
+
+    if( std::max( gridScreenSizeDense, gridScreenSizeCoarse ) < gridDrawThreshold )
+        return;
+
+    // Now draw the grid, every coarse grid line gets the double width
+    for( int j = gridStartY; j < gridEndY; j += 1 )
+    {
+        if( j % gridTick == 0 && gridScreenSizeDense > gridDrawThreshold )
+        {
+            SetLineWidth( doubleWidth );
+        }
+        else
+        {
+            SetLineWidth( width );
+        }
+
+        if( ( j % gridTick == 0 && gridScreenSizeCoarse > gridDrawThreshold )
+            || gridScreenSizeDense > gridDrawThreshold )
+        {
+            DrawGridLine( VECTOR2D( gridStartX * gridSize.x, j * gridSize.y ),
+                          VECTOR2D( gridEndX * gridSize.x,   j * gridSize.y ) );
+        }
+    }
+
+    for( int i = gridStartX; i < gridEndX; i += 1 )
+    {
+        if( i % gridTick == 0 && gridScreenSizeDense > gridDrawThreshold )
+        {
+            SetLineWidth( doubleWidth );
+        }
+        else
+        {
+            SetLineWidth( width );
+        }
+
+        if( ( i % gridTick == 0 && gridScreenSizeCoarse > gridDrawThreshold )
+            || gridScreenSizeDense > gridDrawThreshold )
+        {
+            DrawGridLine( VECTOR2D( i * gridSize.x, gridStartY * gridSize.y ),
+                          VECTOR2D( i * gridSize.x, gridEndY * gridSize.y ) );
+        }
+    }
+
+    // Restore old values
+    SetLineWidth( savedLineWidth );
+    SetStrokeColor( savedColor );
+}
+

common/gal/opengl/shader.cpp

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
+ * Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
+ *
+ * Graphics Abstraction Layer (GAL) for OpenGL
+ *
+ * Shader class
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <iostream>
+#include <fstream>
+
+#include <wx/log.h>
+
+#include <gal/opengl/shader.h>
+
+using namespace KiGfx;
+
+SHADER::SHADER()
+{
+    isProgramCreated    = false;
+    isShaderLinked      = false;
+    maximumVertices     = 4;
+    geomInputType       = GL_LINES;
+    geomOutputType      = GL_LINES;
+}
+
+
+SHADER::~SHADER()
+{
+    if( isProgramCreated )
+    {
+        // Delete the shaders and the program
+        for( std::deque<GLuint>::iterator it = shaderNumbers.begin(); it != shaderNumbers.end();
+             it++ )
+        {
+            glDeleteShader( *it );
+        }
+
+        glDeleteProgram( programNumber );
+    }
+}
+
+
+void SHADER::ProgramInfo( GLuint aProgram )
+{
+    GLint glInfoLogLength = 0;
+    GLint writtenChars    = 0;
+
+    // Get the length of the info string
+    glGetProgramiv( aProgram, GL_INFO_LOG_LENGTH, &glInfoLogLength );
+
+    // Print the information
+    if( glInfoLogLength > 2 )
+    {
+        GLchar* glInfoLog = new GLchar[glInfoLogLength];
+        glGetProgramInfoLog( aProgram, glInfoLogLength, &writtenChars, glInfoLog );
+
+        wxLogInfo( wxString::FromUTF8( (char*) glInfoLog ) );
+
+        delete glInfoLog;
+    }
+}
+
+
+std::string SHADER::ReadSource( std::string aShaderSourceName )
+{
+    // Open the shader source for reading
+    std::ifstream inputFile( aShaderSourceName.c_str(), std::ifstream::in );
+    std::string   shaderSource;
+
+    if( !inputFile )
+    {
+        wxLogError( wxString::FromUTF8( "Can't read the shader source: " ) +
+                    wxString( aShaderSourceName.c_str(), wxConvUTF8 ) );
+        exit( 1 );
+    }
+
+    std::string shaderSourceLine;
+
+    // Read all lines from the text file
+    while( getline( inputFile, shaderSourceLine ) )
+    {
+        shaderSource += shaderSourceLine;
+        shaderSource += "\n";
+    }
+
+    return shaderSource;
+}
+
+
+void SHADER::AddSource( std::string aShaderSourceName, ShaderType aShaderType )
+{
+    if( isShaderLinked )
+    {
+        wxLogError( wxString::FromUTF8( "Shader is already linked!" ) );
+    }
+
+    // Create the program
+    if( !isProgramCreated )
+    {
+        programNumber    = glCreateProgram();
+        isProgramCreated = true;
+    }
+
+    // Load shader sources
+    std::string shaderSource = ReadSource( aShaderSourceName );
+
+    // Create a shader
+    GLuint shaderNumber = glCreateShader( aShaderType );
+    shaderNumbers.push_back( shaderNumber );
+
+    // Get the program info
+    ProgramInfo( programNumber );
+
+    // Copy to char array
+    char* source = new char[shaderSource.size() + 1];
+    strcpy( source, shaderSource.c_str() );
+    const char** source_ = (const char**) ( &source );
+
+    // Attach the source
+    glShaderSource( shaderNumber, 1, source_, NULL );
+    ProgramInfo( programNumber );
+
+    // Compile and attach shader to the program
+    glCompileShader( shaderNumber );
+    glAttachShader( programNumber, shaderNumber );
+    ProgramInfo( programNumber );
+
+    // Special handling for the geometry shader
+    if( aShaderType == SHADER_TYPE_GEOMETRY )
+    {
+        glProgramParameteriEXT( programNumber, GL_GEOMETRY_VERTICES_OUT_EXT, maximumVertices );
+        glProgramParameteriEXT( programNumber, GL_GEOMETRY_INPUT_TYPE_EXT, geomInputType );
+        glProgramParameteriEXT( programNumber, GL_GEOMETRY_OUTPUT_TYPE_EXT, geomOutputType );
+    }
+
+    // Delete the allocated char array
+    delete[] source;
+}
+
+
+void SHADER::ConfigureGeometryShader( GLuint maxVertices, GLuint geometryInputType,
+                                      GLuint geometryOutputType )
+{
+    maximumVertices = maxVertices;
+    geomInputType   = geometryInputType;
+    geomOutputType  = geometryOutputType;
+}
+
+
+void SHADER::Link()
+{
+    // Shader linking
+    glLinkProgram( programNumber );
+    ProgramInfo( programNumber );
+
+    // Check the Link state
+    GLint linkStatus = 0;
+    glGetObjectParameterivARB( programNumber, GL_OBJECT_LINK_STATUS_ARB, &linkStatus );
+
+    if( !linkStatus )
+    {
+        wxLogError( wxString::FromUTF8( "Can't link the shaders!" ) );
+        exit( 1 );
+    }
+
+    isShaderLinked = true;
+}
+
+
+void SHADER::Use()
+{
+    glUseProgram( programNumber );
+}
+
+
+void SHADER::Deactivate()
+{
+    glUseProgram( 0 );
+}
+
+
+void SHADER::AddParameter( std::string aParameterName )
+{
+    GLint location = glGetUniformLocation( programNumber, aParameterName.c_str() );
+
+    if( location != -1 )
+    {
+        parameterLocation.push_back( location );
+    }
+}
+
+
+void SHADER::SetParameter( int parameterNumber, float value )
+{
+    glUniform1f( parameterLocation[parameterNumber], value );
+}

common/gal/opengl/shader/circle.frag

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
+ * Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
+ *
+ * Fragment shader
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+// This shader requires GLSL 1.2
+#version 120
+
+// Input variables
+flat varying vec4 center_;
+flat varying vec2 radius_;
+flat varying vec4 colorA_;
+flat varying vec4 colorB_;
+
+void main( void )
+{
+    // Compute the distance from the circle edge
+    float   distA   = distance( center_, gl_FragCoord ) - radius_.y;
+    float   distB   = radius_.x - distance( center_, gl_FragCoord );
+
+    // Limit the range to [ 0 .. 1 ]
+    if( distA < 0 ) distA = 0;
+    if( distA > 1 ) distA = 1;
+    if( distB < 0 ) distB = 0;
+    if( distB > 1 ) distB = 1;
+
+    // Points with a larger distance from the edge are set deeper
+    gl_FragDepth = gl_FragCoord.z + distA * 0.001 + distB * 0.001;
+
+    // Compute the color
+    vec4 color;
+    color.r = colorA_.r;
+    color.g = colorA_.g;
+    color.b = colorA_.b;
+    color.a = colorA_.a * ( 1 - distA ) * ( 1 - distB );
+
+    // Now output the edge fragment color
+    gl_FragColor = color;
+}

common/gal/opengl/shader/circle.geom

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
+ * Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
+ *
+ * Geometry shader
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+ 
+// This shader requires GLSL 1.2
+#version 120
+#extension GL_EXT_geometry_shader4: enable
+#extension GL_EXT_gpu_shader4: enable
+
+uniform float viewPortX2;
+uniform float viewPortY2;
+
+flat varying vec4 center_;
+flat varying vec2 radius_;
+flat varying vec4 colorA_;
+
+const float PI = 3.141592654;
+const float EPSILON = 0.01;
+const float smallestValue = 1.175494351e-38;
+const int SEGMENTS = 16;
+
+const float PIXEL_EXTEND = 1.5;
+
+void main()
+{
+    vec4 center = gl_PositionIn[0];
+    vec4 radius = gl_PositionIn[1];
+
+    center_ = gl_ModelViewProjectionMatrix * center;
+
+    // Compute the outer and inner radius in screen coordinates
+    // This could be further optimized
+    radius_.x = ( gl_ModelViewProjectionMatrix * vec4(radius.x, 0, 0, 1) ).x;
+    radius_.x = abs( radius_.x - (gl_ModelViewProjectionMatrix * vec4(0, 0, 0, 1) ).x ) * viewPortX2;
+    radius_.y = ( gl_ModelViewProjectionMatrix * vec4(radius.y, 0, 0, 1) ).x;
+    radius_.y = abs( radius_.y - (gl_ModelViewProjectionMatrix * vec4(0, 0, 0, 1) ).x ) * viewPortX2;
+
+    // Compute the center point in screen coordinates
+    center_.x = center_.x * viewPortX2 + viewPortX2;
+    center_.y = center_.y * viewPortY2 + viewPortY2;
+
+    // Compute the extend value, first make sure that the outline is inside the triangles and second add
+    // a margin for one pixel for smooth edges
+    float extendInner = 1.0;
+    float extendOuter = 0;
+    if( radius_.y > smallestValue )
+    {
+        extendOuter += PIXEL_EXTEND / radius_.y;
+    }
+    extendOuter += 1.0 / cos( PI / SEGMENTS );
+
+    colorA_ = gl_FrontColorIn[0];
+
+    // Create a quad strip for the outer circle edge
+    for( float alpha = 0, inc = 2 * PI / SEGMENTS, limit = 2 * PI + EPSILON;
+         alpha < limit; alpha += inc )
+    {
+        gl_Position = gl_ModelViewProjectionMatrix *
+                vec4( center.x + extendInner * radius.y * cos( alpha ),
+                      center.y + extendInner * radius.y * sin( alpha ), center.zw );
+        EmitVertex();
+        gl_Position = gl_ModelViewProjectionMatrix *
+                vec4( center.x + extendOuter * radius.y * cos( alpha ),
+                      center.y + extendOuter * radius.y * sin( alpha ), center.zw );
+        EmitVertex();
+    }
+    EndPrimitive();
+
+    if( radius.x > 0 )
+    {
+        extendInner = cos( PI / SEGMENTS ) - PIXEL_EXTEND / radius_.x;
+        if( extendInner < 0.0 )
+        {
+            extendInner = 0;
+        }
+        extendOuter = 1.0 / cos( PI / SEGMENTS);
+
+        // Create a quad strip for the inner circle edge
+        for( float alpha = 0, inc = 2 * PI / SEGMENTS, limit = 2 * PI + EPSILON;
+             alpha < limit; alpha += inc )
+        {
+            gl_Position = gl_ModelViewProjectionMatrix *
+                    vec4( center.x + extendOuter * radius.x * cos( alpha ),
+                          center.y + extendOuter * radius.x * sin( alpha ), center.zw );
+            EmitVertex();
+            gl_Position = gl_ModelViewProjectionMatrix *
+                    vec4( center.x + extendInner * radius.x * cos( alpha ),
+                          center.y + extendInner * radius.x * sin( alpha ), center.zw );
+            EmitVertex();
+        }
+        EndPrimitive();
+    }
+}

common/gal/opengl/shader/circle.vert

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
+ * Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
+ *
+ * Vertex shader
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+// This shader requires GLSL 1.2
+#version 120
+
+void main()
+{
+    // Simple pass-through
+    gl_Position   = gl_Vertex;
+    gl_FrontColor = gl_Color;
+}

common/gal/opengl/shader/line.frag

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
+ * Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
+ *
+ * Fragment shader
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#version 120
+#extension GL_EXT_gpu_shader4: enable
+
+varying float dist;
+
+void main()
+{
+    float d = dist;
+    gl_FragDepth = gl_FragCoord.z + d * 0.001;
+    gl_FragColor = vec4( gl_Color.rgb, gl_Color.a * ( 1 - d ) );
+}

common/gal/opengl/shader/line.geom

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
+ * Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
+ *
+ * Geometry shader
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+ 
+#version 120
+#extension GL_EXT_geometry_shader4: enable
+#extension GL_EXT_gpu_shader4: enable
+
+uniform float viewPortX2;
+uniform float viewPortY2;
+varying float dist;
+
+void main()
+{
+    // Compute the transformed start and end points
+    vec2    startPoint = gl_PositionIn[0].xy;
+    vec2    endPoint   = gl_PositionIn[1].xy;
+    float   lineWidth  = gl_PositionIn[1].z;
+
+    // Compute vector start -> end
+    vec2    startEndVector = endPoint.xy - startPoint.xy;
+    float   lineLength     = distance( startPoint, endPoint );
+    float   scale = 0.0;
+
+    if( lineLength > 0.0 )
+    {
+        scale = 0.5 * lineWidth / lineLength;
+    }
+    else
+    {
+        scale = 0.0;
+    }
+
+    // Compute the edge points of the line
+    vec2    perpendicularVector = scale * vec2( -startEndVector.y, startEndVector.x );
+    vec2    point1  = startPoint + perpendicularVector;
+    vec2    point2  = startPoint - perpendicularVector;
+    vec2    point3  = endPoint + perpendicularVector;
+    vec2    point4  = endPoint - perpendicularVector;
+
+    vec4    point1T = gl_ModelViewProjectionMatrix * vec4( point1, gl_PositionIn[0].zw );
+    vec4    point2T = gl_ModelViewProjectionMatrix * vec4( point2, gl_PositionIn[0].zw );
+    vec4    point3T = gl_ModelViewProjectionMatrix * vec4( point3, gl_PositionIn[0].zw );
+    vec4    point4T = gl_ModelViewProjectionMatrix * vec4( point4, gl_PositionIn[0].zw );
+
+    // Construct the quad for the middle
+    gl_FrontColor = gl_FrontColorIn[0];
+    dist = 0;
+    gl_Position = point1T;
+    EmitVertex();
+    dist = 0;
+    gl_Position = point2T;
+    EmitVertex();
+    dist = 0;
+    gl_Position = point3T;
+    EmitVertex();
+    dist = 0;
+    gl_Position = point4T;
+    EmitVertex();
+
+    EndPrimitive();
+
+    // Compute the perpendicular vector with 1 pixel width
+    vec2 v      = point1T.xy - point3T.xy;
+    vec4 onePix = 0.5 * vec4( -v.y, v.x, 0, 0 );
+    onePix     *= 1.0 / sqrt( dot( onePix, onePix ) );
+    onePix.x   *= 1.0 / viewPortX2;
+    onePix.y   *= 1.0 / viewPortY2;
+
+    gl_FrontColor = gl_FrontColorIn[0];
+
+    dist = 1;
+    gl_Position = point1T + onePix;
+    EmitVertex();
+    dist = 1;
+    gl_Position = point3T + onePix;
+    EmitVertex();
+    dist = 0;
+    gl_Position = point1T;
+    EmitVertex();
+    dist = 0;
+    gl_Position = point3T;
+    EmitVertex();
+
+    EndPrimitive();
+
+    dist = 1;
+    gl_Position = point2T - onePix;
+    EmitVertex();
+    dist = 1;
+    gl_Position = point4T - onePix;
+    EmitVertex();
+    dist = 0;
+    gl_Position = point2T;
+    EmitVertex();
+    dist = 0;
+    gl_Position = point4T;
+    EmitVertex();
+
+    EndPrimitive();
+}

common/gal/opengl/shader/line.vert

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
+ * Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
+ *
+ * Vertex shader
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+// This shader requires GLSL 1.2
+#version 120
+
+void main()
+{
+    // Simple pass-through
+    gl_Position   = gl_Vertex;
+    gl_FrontColor = gl_Color;
+}

common/gal/opengl/shader/round.frag

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2013 Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ *
+ * Fragment shader
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#version 120
+
+varying float aspect;
+
+void main()
+{
+    vec2 v = abs( gl_TexCoord[0].xy - vec2( 0.5, 0.5 ) ) * 2.0 - vec2( aspect, 0.0 );
+    vec2 d = vec2( v.x / ( 1.0 - aspect ), v.y );
+
+    if( v.x <= 0.0 || (dot( d, d ) < 1.0 ) )
+        gl_FragColor = gl_Color;
+    else
+        discard;
+
+    // gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);
+}

common/gal/opengl/shader/round.vert

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2013 Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ *
+ * Vertex shader
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+ 
+#version 120
+
+varying float  aspect;
+
+void main()
+{
+    gl_Position    = gl_ModelViewProjectionMatrix * gl_Vertex;
+    gl_FrontColor  = gl_Color;
+    gl_TexCoord[0] = gl_MultiTexCoord0;
+
+    aspect = gl_Normal.x;
+}

common/gal/stroke_font.cpp

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
+ * Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
+ *
+ * Stroke font class
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <gal/stroke_font.h>
+#include <gal/graphics_abstraction_layer.h>
+
+using namespace KiGfx;
+
+STROKE_FONT::STROKE_FONT( GAL* aGal ) :
+    m_gal( aGal ),
+    m_bold( false ),
+    m_italic( false ),
+    m_mirrored( false )
+{
+    // Default values
+    m_scaleFactor = 1.0 / 21.0;
+    m_glyphSize = VECTOR2D( 10.0, 10.0 );
+    m_verticalJustify   = GR_TEXT_VJUSTIFY_BOTTOM;
+    m_horizontalJustify = GR_TEXT_HJUSTIFY_LEFT;
+}
+
+
+STROKE_FONT::~STROKE_FONT()
+{
+}
+
+
+bool STROKE_FONT::LoadNewStrokeFont( const char* const aNewStrokeFont[], int aNewStrokeFontSize )
+{
+    m_glyphs.clear();
+    m_glyphBoundingBoxes.clear();
+
+    for( int j = 0; j < aNewStrokeFontSize; j++ )
+    {
+        Glyph    glyph;
+        double   glyphStartX;
+        double   glyphEndX;
+        VECTOR2D glyphBoundingX;
+
+        std::deque<VECTOR2D> pointList;
+
+        int i = 0;
+
+        while( aNewStrokeFont[j][i] )
+        {
+            VECTOR2D    point;
+            char        coordinate[2];
+
+            for( int k = 0; k < 2; k++ )
+            {
+                coordinate[k] = aNewStrokeFont[j][i + k];
+            }
+
+            if( i < 2 )
+            {
+                // The first two values contain the width of the char
+                glyphStartX     = coordinate[0] - 'R';
+                glyphEndX       = coordinate[1] - 'R';
+                glyphBoundingX  = VECTOR2D( 0, glyphEndX - glyphStartX );
+            }
+            else if( ( coordinate[0] == ' ' ) && ( coordinate[1] == 'R' ) )
+            {
+                // Raise pen
+                if( pointList.size() > 0 )
+                    glyph.push_back( pointList );
+
+                pointList.clear();
+            }
+            else
+            {
+                // Every coordinate description of the Hershey format has an offset,
+                // it has to be subtracted
+                point.x = (double) ( coordinate[0] - 'R' ) - glyphStartX;
+                point.y = (double) ( coordinate[1] - 'R' ) - 11.0;
+                pointList.push_back( point );
+            }
+
+            i += 2;
+        }
+
+        if( pointList.size() > 0 )
+            glyph.push_back( pointList );
+
+        m_glyphs.push_back( glyph );
+
+        // Compute the bounding box of the glyph
+        m_glyphBoundingBoxes.push_back( computeBoundingBox( glyph, glyphBoundingX ) );
+    }
+
+    return true;
+}
+
+
+void STROKE_FONT::LoadAttributes( const EDA_TEXT* aText )
+{
+    SetGlyphSize( VECTOR2D( aText->GetSize() ) );
+    SetHorizontalJustify( aText->GetHorizJustify() );
+    SetVerticalJustify( aText->GetVertJustify() );
+    SetBold( aText->IsBold() );
+    SetItalic( aText->IsItalic() );
+    SetMirrored( aText->IsMirrored() );
+}
+
+
+BOX2D STROKE_FONT::computeBoundingBox( Glyph aGlyph, VECTOR2D aGlyphBoundingX )
+{
+    BOX2D boundingBox;
+
+    std::deque<VECTOR2D> boundingPoints;
+
+    boundingPoints.push_back( VECTOR2D( aGlyphBoundingX.x, 0 ) );
+    boundingPoints.push_back( VECTOR2D( aGlyphBoundingX.y, 0 ) );
+
+    for( Glyph::iterator pointListIt = aGlyph.begin(); pointListIt != aGlyph.end(); ++pointListIt )
+    {
+        for( std::deque<VECTOR2D>::iterator pointIt = pointListIt->begin();
+                pointIt != pointListIt->end(); ++pointIt )
+        {
+            boundingPoints.push_back( VECTOR2D( aGlyphBoundingX.x, pointIt->y ) );
+        }
+    }
+
+    boundingBox.Compute( boundingPoints );
+
+    return boundingBox;
+}
+
+
+void STROKE_FONT::Draw( std::string aText, VECTOR2D aPosition, double aRotationAngle )
+{
+    // Compute the text size
+    VECTOR2D textsize = computeTextSize( aText );
+
+    // Context needs to be saved before any transformations
+    m_gal->Save();
+
+    m_gal->Translate( aPosition );
+    m_gal->Rotate( -aRotationAngle );
+
+    // Adjust the text position to the given alignment
+    switch( m_horizontalJustify )
+    {
+    case GR_TEXT_HJUSTIFY_CENTER:
+        m_gal->Translate( VECTOR2D( -textsize.x / 2, 0 ) );
+        break;
+
+    case GR_TEXT_HJUSTIFY_RIGHT:
+        m_gal->Translate( VECTOR2D( -textsize.x, 0 ) );
+        break;
+
+    case GR_TEXT_HJUSTIFY_LEFT:
+        break;
+
+    default:
+        break;
+    }
+
+    switch( m_verticalJustify )
+    {
+    case GR_TEXT_VJUSTIFY_CENTER:
+        m_gal->Translate( VECTOR2D( 0, textsize.y / 2 ) );
+        break;
+
+    case GR_TEXT_VJUSTIFY_TOP:
+        m_gal->Translate( VECTOR2D( 0, textsize.y ) );
+        break;
+
+    case GR_TEXT_VJUSTIFY_BOTTOM:
+        break;
+
+    default:
+        break;
+    }
+
+    double xOffset, glyphSizeX;
+
+    if( m_mirrored )
+    {
+        // In case of mirrored text invert the X scale of points and their X direction
+        // (m_glyphSize.x) and start drawing from the position where text normally should end
+        // (textsize.x)
+        xOffset     = textsize.x;
+        glyphSizeX  = -m_glyphSize.x;
+    }
+    else
+    {
+        xOffset     = 0.0;
+        glyphSizeX  = m_glyphSize.x;
+    }
+    double scaleY = m_scaleFactor * m_glyphSize.y;
+    double scaleX = m_scaleFactor * glyphSizeX;
+
+    if( m_bold )
+    {
+        m_gal->SetLineWidth( m_gal->GetLineWidth() * 1.3 );
+    }
+
+    for( std::string::iterator chIt = aText.begin(); chIt != aText.end(); chIt++ )
+    {
+        GlyphList::iterator glyphIt = m_glyphs.begin();
+        std::deque<BOX2D>::iterator bbIt = m_glyphBoundingBoxes.begin();
+
+        advance( glyphIt, (int) ( *chIt ) - (int) ' ' );
+        advance( bbIt, (int) ( *chIt ) - (int) ' ' );
+
+        Glyph glyph = *glyphIt;
+
+        for( Glyph::iterator pointListIt = glyph.begin(); pointListIt != glyph.end();
+             pointListIt++ )
+        {
+            std::deque<VECTOR2D> pointListScaled;
+
+            for( std::deque<VECTOR2D>::iterator pointIt = pointListIt->begin();
+                 pointIt != pointListIt->end(); pointIt++ )
+            {
+                VECTOR2D pointPos( pointIt->x * scaleX + xOffset, pointIt->y * scaleY );
+
+                if( m_italic )
+                {
+                    // FIXME should be done other way - referring to the lowest Y value of point
+                    // because now italic fonts are translated a bit
+                    pointPos.x += pointPos.y * 0.1;
+                }
+
+                pointListScaled.push_back( pointPos );
+            }
+
+            m_gal->DrawPolyline( pointListScaled );
+        }
+
+        xOffset += m_scaleFactor * glyphSizeX *
+                   ( bbIt->GetEnd().x - bbIt->GetOrigin().x );
+    }
+
+    m_gal->Restore();
+}
+
+
+VECTOR2D STROKE_FONT::computeTextSize( std::string aText )
+{
+    VECTOR2D result = VECTOR2D( 0.0, 0.0 );
+
+    for( std::string::iterator chIt = aText.begin(); chIt != aText.end(); chIt++ )
+    {
+        std::deque<BOX2D>::iterator bbIt = m_glyphBoundingBoxes.begin();
+        advance( bbIt, (int) ( *chIt ) - (int) ' ' );
+        result.x += m_scaleFactor * m_glyphSize.x * ( bbIt->GetEnd().x - bbIt->GetOrigin().x );
+    }
+
+    result.y = m_glyphSize.y;
+
+    return result;
+}

common/painter.cpp

+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
+ * Copyright (C) 2013 CERN
+ * @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ * @author Maciej Suminski <maciej.suminski@cern.ch>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <eda_text.h>
+#include <view/view.h>
+#include <painter.h>
+#include <gal/stroke_font.h>
+#include <newstroke_font.h>
+
+using namespace KiGfx;
+
+RENDER_SETTINGS::RENDER_SETTINGS()
+{
+    // Set the default initial values
+    m_selectionBorderColor = COLOR4D( 1.0, 1.0, 1.0, 1.0 );
+    m_netLabelColor = COLOR4D( 1.0, 1.0, 1.0, 0.7 );
+
+    m_highlightFactor   = 0.5;
+    m_selectFactor      = 0.5;
+    m_layerOpacity      = 0.8;
+    m_highlightEnabled  = false;
+    m_hiContrastEnabled = false;
+    m_hiContrastFactor  = 0.2;
+
+    // Store the predefined colors used in KiCad in format used by GAL
+    for( int i = 0; i < NBCOLOR; i++ )
+    {
+        m_legacyColorMap[ColorRefs[i].m_Numcolor] = COLOR4D( (double) ColorRefs[i].m_Red / 255.0,
+                                                             (double) ColorRefs[i].m_Green / 255.0,
+                                                             (double) ColorRefs[i].m_Blue / 255.0,
+                                                             m_layerOpacity );
+    }
+}
+
+
+RENDER_SETTINGS::~RENDER_SETTINGS()
+{
+}
+
+
+void RENDER_SETTINGS::Update()
+{
+    m_hiContrastColor = COLOR4D( m_hiContrastFactor, m_hiContrastFactor, m_highlightFactor,
+                                 m_layerOpacity );
+}
+
+
+PAINTER::PAINTER( GAL* aGal ) :
+    m_gal( aGal ), m_settings( NULL )
+{
+    m_stroke_font = new STROKE_FONT( aGal );
+    m_stroke_font->LoadNewStrokeFont( newstroke_font, newstroke_font_bufsize );
+}
+
+
+PAINTER::~PAINTER()
+{
+    delete m_stroke_font;
+}

common/profile.h

+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2013 CERN
+ * @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+/**
+ * @file profile.h:
+ * @brief Simple profiling functions for measuring code execution time. Currently only Linux is
+ * supported.
+ */
+
+#ifndef __PROFILE_H
+#define __PROFILE_H
+
+#ifdef __linux__
+    #include <sys/time.h>
+#endif
+
+#include <stdint.h>
+
+/**
+ * Function rdtsc
+ * Returns processor's time-stamp counter. Main purpose is precise time measuring of code
+ * execution time.
+ * @return unsigned long long - Value of time-stamp counter.
+ */
+#if defined(__i386__)
+static __inline__ unsigned long long rdtsc()
+{
+    unsigned long long int x;
+    __asm__ volatile ( ".byte 0x0f, 0x31" : "=A" ( x ) );
+
+    return x;
+}
+
+
+#elif defined(__x86_64__)
+static __inline__ unsigned long long rdtsc()
+{
+    unsigned hi, lo;
+    __asm__ __volatile__ ( "rdtsc" : "=a" ( lo ), "=d" ( hi ) );
+
+    return ( (unsigned long long) lo ) | ( ( (unsigned long long) hi ) << 32 );
+}
+
+
+#elif defined(__powerpc__)
+static __inline__ unsigned long long rdtsc()
+{
+    unsigned long long int  result = 0;
+    unsigned long int       upper, lower, tmp;
+    __asm__ volatile (
+        "0:                  \n"
+        "\tmftbu   %0           \n"
+        "\tmftb    %1           \n"
+        "\tmftbu   %2           \n"
+        "\tcmpw    %2,%0        \n"
+        "\tbne     0b         \n"
+        : "=r" ( upper ), "=r" ( lower ), "=r" ( tmp )
+        );
+
+    result  = upper;
+    result  = result << 32;
+    result  = result | lower;
+
+    return result;
+}
+
+
+#endif /* __powerpc__ */
+
+// Fixme: OS X version
+/**
+ * Function get_tics
+ * Returns the number of milliseconds that have elapsed since the system was started.
+ * @return uint64_t Number of milliseconds.
+ */
+static inline uint64_t get_tics()
+{
+#if defined(__linux__)
+    struct timezone tz = { 0, 0 };
+    struct timeval tv;
+    gettimeofday( &tv, &tz );
+
+    return (uint64_t) tv.tv_sec * 1000000ULL + (uint64_t) tv.tv_usec;
+#elif defined _WIN32 || defined _WIN64
+    // TODO to be tested
+    return GetTickCount();
+#else
+    return 0;
+#endif
+}
+
+
+/**
+ * Structure for storing data related to profiling counters.
+ */
+struct prof_counter
+{
+    uint64_t    value;          /// Stored timer value
+    bool        use_rdtsc;      /// Method of time measuring (rdtsc or tics)
+};
+
+/**
+ * Function prof_start
+ * Begins code execution time counting for a given profiling counter.
+ * @param cnt is the counter which should be started.
+ * @param use_rdtsc tells if processor's time-stamp counter should be used for time counting.
+ *      Otherwise is system tics method will be used.
+ */
+static inline void prof_start( prof_counter* cnt, bool use_rdtsc )
+{
+    cnt->use_rdtsc = use_rdtsc;
+
+    if( use_rdtsc )
+    {
+        cnt->value = rdtsc();
+    }
+    else
+    {
+        cnt->value = get_tics();
+    }
+}
+
+
+/**
+ * Function prof_stop
+ * Ends code execution time counting for a given profiling counter.
+ * @param cnt is the counter which should be stopped.
+ */
+static inline void prof_end( prof_counter* cnt )
+{
+    if( cnt->use_rdtsc )
+        cnt->value = rdtsc() - cnt->value;
+    else
+        cnt->value = get_tics() - cnt->value;
+}
+
+
+#endif

common/view/view_item.cpp

+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2013 CERN
+ * @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <gal/definitions.h>
+
+#include <view/view_item.h>
+#include <view/view.h>
+
+using namespace KiGfx;
+
+void VIEW_ITEM::ViewSetVisible( bool aIsVisible )
+{
+    bool update = false;
+
+    if( m_viewVisible != aIsVisible )
+    {
+        update = true;
+    }
+
+    m_viewVisible = aIsVisible;
+
+    // update only if the visibility has really changed
+    if( update )
+    {
+        ViewUpdate( APPEARANCE );
+    }
+}
+
+
+void VIEW_ITEM::ViewUpdate( int aUpdateFlags, bool aForceImmediateRedraw )
+{
+    m_view->invalidateItem( this, aUpdateFlags );
+
+    if( aForceImmediateRedraw )
+    {
+        m_view->Redraw();
+    }
+}
+
+
+void VIEW_ITEM::ViewRelease()
+{
+    if( m_view && m_view->IsDynamic() )
+    {
+        m_view->Remove( this );
+    }
+}

common/view/wx_view_controls.cpp

+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
+ * Copyright (C) 2013 CERN
+ * @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <wx/wx.h>
+#include <wx/window.h>
+
+#include <view/view.h>
+#include <view/wx_view_controls.h>
+
+using namespace KiGfx;
+
+WX_VIEW_CONTROLS::WX_VIEW_CONTROLS( VIEW* aView, wxWindow* aParentPanel ) :
+    VIEW_CONTROLS( aView ),
+    m_autoPanMargin( 0.1 ),
+    m_autoPanSpeed( 0.15 ),
+    m_autoPanCornerRatio( 0.1 ),
+    m_parentPanel( aParentPanel )
+{
+    m_parentPanel->Connect( wxEVT_MOTION, wxMouseEventHandler(
+                                WX_VIEW_CONTROLS::onMotion ), NULL, this );
+    m_parentPanel->Connect( wxEVT_MOUSEWHEEL, wxMouseEventHandler(
+                                WX_VIEW_CONTROLS::onWheel ), NULL, this );
+    m_parentPanel->Connect( wxEVT_RIGHT_UP, wxMouseEventHandler(
+                                WX_VIEW_CONTROLS::onButton ), NULL, this );
+    m_parentPanel->Connect( wxEVT_RIGHT_DOWN, wxMouseEventHandler(
+                                WX_VIEW_CONTROLS::onButton ), NULL, this );
+}
+
+
+void WX_VIEW_CONTROLS::onMotion( wxMouseEvent& event )
+{
+    VECTOR2D mousePoint( event.GetX(), event.GetY() );
+
+    if( event.Dragging() )
+    {
+        if( m_isDragPanning )
+        {
+            VECTOR2D d     = m_dragStartPoint - mousePoint;
+            VECTOR2D delta = m_view->ToWorld( d, false );
+
+            m_view->SetCenter( m_lookStartPoint + delta );
+            m_parentPanel->Refresh();
+        }
+        else
+        {
+            event.Skip();
+        }
+    }
+}
+
+
+void WX_VIEW_CONTROLS::onWheel( wxMouseEvent& event )
+{
+    const double wheelPanSpeed = 0.001;
+
+    if( event.ControlDown() )
+    {
+        wxLongLong  timeStamp   = wxGetLocalTimeMillis();
+        double      timeDiff    = timeStamp.ToDouble() - m_timeStamp.ToDouble();
+
+        m_timeStamp = timeStamp;
+        double      zoomScale;
+
+        // Set scaling speed depending on scroll wheel event interval
+        if( timeDiff < 500 && timeDiff > 0 )
+        {
+            zoomScale = ( event.GetWheelRotation() > 0.0 ) ? 2.05 - timeDiff / 500 :
+                        1.0 / ( 2.05 - timeDiff / 500 );
+        }
+        else
+        {
+            zoomScale = ( event.GetWheelRotation() > 0.0 ) ? 1.05 : 0.95;
+        }
+
+
+        VECTOR2D anchor = m_view->ToWorld( VECTOR2D( event.GetX(), event.GetY() ) );
+        m_view->SetScale( m_view->GetScale() * zoomScale, anchor );
+        m_parentPanel->Refresh();
+    }
+    else
+    {
+        VECTOR2D scrollVec = m_view->ToWorld( m_view->GetScreenPixelSize() *
+                             ( (double) event.GetWheelRotation() * wheelPanSpeed ), false );
+        double   scrollSpeed;
+
+        if( abs( scrollVec.x ) > abs( scrollVec.y ) )
+            scrollSpeed = scrollVec.x;
+        else
+            scrollSpeed = scrollVec.y;
+
+        VECTOR2D t = m_view->GetScreenPixelSize();
+        VECTOR2D delta( event.ShiftDown() ? scrollSpeed : 0.0,
+                        !event.ShiftDown() ? scrollSpeed : 0.0 );
+
+        m_view->SetCenter( m_view->GetCenter() + delta );
+        m_parentPanel->Refresh();
+    }
+}
+
+
+void WX_VIEW_CONTROLS::onButton( wxMouseEvent& event )
+{
+    if( event.RightDown() )
+    {
+        m_isDragPanning     = true;
+        m_dragStartPoint    = VECTOR2D( event.GetX(), event.GetY() );
+        m_lookStartPoint    = m_view->GetCenter(); // ookAtPoint();
+    }
+    else if( event.RightUp() )
+    {
+        m_isDragPanning = false;
+    }
+
+    event.Skip();
+}

cvpcb/CMakeLists.txt

@@ -104,6 +104,13 @@ target_link_libraries(cvpcb
     ${GDI_PLUS_LIBRARIES}
     )
 
+if(KICAD_GAL)
+target_link_libraries(cvpcb
+    gal
+    ${GLEW_LIBRARIES}
+    )
+endif(KICAD_GAL)
+
 ###
 # Add cvpcb as install target
 ###

include/class_board_item.h

@@ -248,6 +248,9 @@ public:
     static std::string FormatInternalUnits( const wxPoint& aPoint );
 
     static std::string FormatInternalUnits( const wxSize& aSize );
+
+    /// @copydoc VIEW_ITEM::ViewGetLayers()
+    virtual void ViewGetLayers( int aLayers[], int& aCount ) const;
 };
 
 #endif /* BOARD_ITEM_STRUCT_H */