Introduction of VBO. Now only tracks are rendered in a very simple way.

common/CMakeLists.txt

@@ -20,6 +20,7 @@ set(GAL_SRCS
     gal/color4d.cpp
     gal/opengl/opengl_gal.cpp
     gal/opengl/shader.cpp
+    gal/opengl/vbo_item.cpp
     gal/cairo/cairo_gal.cpp
     view/wx_view_controls.cpp
     )

common/drawpanel_gal.cpp

@@ -65,9 +65,8 @@ EDA_DRAW_PANEL_GAL::EDA_DRAW_PANEL_GAL( wxWindow* aParentWindow, wxWindowID aWin
     m_gal->ComputeWorldScreenMatrix();
 
     m_painter = new KiGfx::PCB_PAINTER( m_gal );
-    m_painter->SetGAL( m_gal );
 
-    m_view = new KiGfx::VIEW( true );
+    m_view = new KiGfx::VIEW( true, true );
     m_view->SetPainter( m_painter );
     m_view->SetGAL( m_gal );
 
@@ -157,9 +156,6 @@ void EDA_DRAW_PANEL_GAL::SwitchBackend( GalType aGalType, bool aUseShaders )
     if( m_view )
         m_view->SetGAL( m_gal );
 
-    if( m_painter )
-        m_painter->SetGAL( m_gal );
-
     wxSize size = GetClientSize();
     m_gal->ResizeScreen( size.GetX(), size.GetY() );
 }

common/gal/opengl/vbo_item.cpp

+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2013 CERN
+ * @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
+ */
+
+/**
+ * @file vbo_item.cpp
+ * @brief Class to handle an item held in a Vertex Buffer Object.
+ */
+
+#include <gal/opengl/vbo_item.h>
+#include <cstring>
+
+using namespace KiGfx;
+
+VBO_ITEM::VBO_ITEM() :
+        m_vertices( NULL ),
+        m_indices( NULL ),
+        m_offset( 0 ),
+        m_size( 0 ),
+        m_isDirty( true )
+{
+}
+
+
+VBO_ITEM::~VBO_ITEM()
+{
+    if( m_vertices )
+        delete m_vertices;
+}
+
+
+void VBO_ITEM::PushVertex( const GLfloat* aVertex )
+{
+    GLfloat* newVertices = new GLfloat[( m_size + 1 ) * VertStride];
+    GLuint*  newIndices  = new GLuint[( m_size + 1 ) * IndStride];
+
+    // Handle a new vertex
+    if( m_vertices )
+    {
+        // Copy all previous vertices data
+        memcpy( newVertices, m_vertices, ( m_size ) * VertSize );
+        delete m_vertices;
+    }
+    m_vertices = newVertices;
+
+    // Add the new vertex
+    memcpy( &newVertices[m_size * VertStride], aVertex, VertSize );
+
+    // Handle a new index
+    if( m_indices )
+    {
+        // Copy all previous vertices data
+        memcpy( newIndices, m_indices, ( m_size ) * IndSize );
+        delete m_indices;
+    }
+    m_indices = newIndices;
+
+    // Add the new vertex
+    newIndices[m_size] = m_offset + m_size;
+
+    m_size++;
+    m_isDirty = true;
+}
+
+
+void VBO_ITEM::PushVertices( const GLfloat* aVertex, GLuint aSize )
+{
+    // FIXME to be done
+    m_isDirty = true;
+}
+
+
+GLfloat* VBO_ITEM::GetVertices() const
+{
+    return m_vertices;
+}
+
+
+GLuint* VBO_ITEM::GetIndices() const
+{
+    return m_indices;
+}
+
+
+int VBO_ITEM::GetSize() const
+{
+    return m_size;
+}
+
+
+void VBO_ITEM::SetOffset( int aOffset )
+{
+    m_offset = aOffset;
+    // TODO change offset for all the vertices?
+}
+
+
+int VBO_ITEM::GetOffset() const
+{
+    return m_offset;
+}
+
+
+/*
+// TODO
+void SetVbo( int aVboId )
+{
+}
+
+
+int GetVbo()
+{
+}
+*/

common/view/view.cpp

@@ -205,6 +205,9 @@ void VIEW::SetGAL( GAL* aGal )
 {
     m_gal = aGal;
 
+    if( m_painter )
+        m_painter->SetGAL( m_gal );
+
     // items need to be recached after changing GAL
     if( m_useGroups )
         recacheAllItems();

include/gal/opengl/opengl_gal.h

@@ -55,6 +55,7 @@
 namespace KiGfx
 {
 class SHADER;
+class VBO_ITEM;
 
 /**
  * @brief Class OpenGL_GAL is the OpenGL implementation of the Graphics Abstraction Layer.
@@ -88,7 +89,7 @@ public:
      */
     OPENGL_GAL( wxWindow* aParent, wxEvtHandler* aMouseListener = NULL,
                 wxEvtHandler* aPaintListener = NULL, bool isUseShaders = false,
-                const wxString& aName = wxT("GLCanvas") );
+                const wxString& aName = wxT( "GLCanvas" ) );
 
     virtual ~OPENGL_GAL();
 
@@ -132,7 +133,7 @@ public:
     // Screen methods
     // --------------
 
-/// @brief Resizes the canvas.
+    /// @brief Resizes the canvas.
     virtual void ResizeScreen ( int aWidth, int aHeight );
 
     /// @brief Shows/hides the GAL canvas
@@ -340,6 +341,15 @@ private:
     GLuint                displayListSemiCircle;  ///< Semi circle display list
     std::deque<GLuint>    displayListsGroup;      ///< List of display lists used for groups
 
+    // Vertex buffer objects related fields
+    std::deque<VBO_ITEM*> vboItems;               ///< Stores informations about VBO objects
+    VBO_ITEM*             curVboItem;
+    GLuint                curVboVertId;
+    GLuint                curVboIndId;
+
+    int                   vboSize;
+    bool                  vboNeedsUpdate;
+
     double                curvePoints[12];  ///< Coefficients for curves
     std::deque<VECTOR2D>  unitCirclePoints; ///< List of the points on a unit circle
 
@@ -368,6 +378,7 @@ private:
     bool            isCreated;
     bool            isGlewInitialized;          ///< Is GLEW initialized?
     bool            isFrameBufferInitialized;   ///< Are the frame buffers initialized?
+    bool            isVboInitialized;
     bool            isShaderInitialized;        ///< Was the shader initialized?
     bool            isShaderEnabled;            ///< Are the shaders enabled?
     bool            isUseShader;                ///< Should the shaders be used?
@@ -457,6 +468,15 @@ private:
      */
     void deleteFrameBuffer( GLuint* aFrameBuffer, GLuint* aDepthBuffer, GLuint* aTexture );
 
+    // TODO comment
+    void initVertexBufferObjects();
+
+    // TODO comment
+    void deleteVertexBufferObjects();
+
+    // TODO comment
+    void rebuildVbo();
+
     /**
      * @brief Draw a quad for the line.
      *

include/gal/opengl/vbo_item.h

+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2013 CERN
+ * @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
+ */
+
+/**
+ * @file vbo_item.h
+ * @brief Class to handle an item held in a Vertex Buffer Object.
+ */
+
+// TODO comments
+
+#ifndef VBO_ITEM_H_
+#define VBO_ITEM_H_
+
+#include <GL/gl.h>
+
+namespace KiGfx
+{
+
+class VBO_ITEM
+{
+public:
+    VBO_ITEM();
+    ~VBO_ITEM();
+
+    // TODO comments
+    void PushVertex( const GLfloat* aVertex );
+    void PushVertices( const GLfloat* aVertex, GLuint aSize );
+
+    /**
+     * Function GetVertices()
+     * Returns a pointer to the array containing all vertices.
+     * @return Pointer to vertices packed in format {X, Y, Z, R, G, B, A}.
+     */
+    GLfloat* GetVertices() const;
+
+    GLuint* GetIndices() const;
+
+    /**
+     * Function GetSize()
+     * Returns information about number of vertices stored.
+     * @param Amount of vertices.
+     */
+    int  GetSize() const;
+
+    /**
+     * Function SetOffset()
+     * Sets data offset in the VBO.
+     * @param aOffset is the offset expressed as a number of vertices.
+     */
+    void SetOffset( int aOffset );
+
+    /**
+     * Function GetOffset()
+     * Returns data offset in the VBO.
+     * @return Data offset expressed as a number of vertices.
+     */
+    int  GetOffset() const;
+
+    ///< Functions for getting VBO ids.
+    //void SetVbo( int aVboId );
+    //int  GetVbo();
+
+    ///< Data organization information for vertices.
+    static const int VertStride  = 7;
+    static const int VertSize    = VertStride * sizeof(GLfloat);
+    static const int IndStride   = 1;
+    static const int IndSize     = IndStride * sizeof(GLuint);
+    static const int ColorOffset = 3 * sizeof(GLfloat);
+
+private:
+    ///< VBO ids in which the item is stored.
+    //int      m_vboId; // not used yet
+
+    ///< Contains vertices coordinates and colors.
+    ///< Packed by 7 floats for each vertex: {X, Y, Z, R, G, B, A}
+    GLfloat* m_vertices;
+
+    GLuint*  m_indices;
+
+    ///< Offset and size of data in VBO.
+    int      m_offset;
+    int      m_size;
+
+    ///< Shader data used for rendering.
+    int      m_shader;
+    int      m_shaderAttrib;
+
+    ///< Flag telling if the item should be recached in VBO or not.
+    bool     m_isDirty;
+};
+} // namespace KiGfx
+
+#endif /* VBO_ITEM_H_ */

pcbnew/basepcbframe.cpp

@@ -166,7 +166,7 @@ void PCB_BASE_FRAME::SetBoard( BOARD* aBoard )
         // in order to be displayed
 
         // Load zones
-        for( int i = 0; i < m_Pcb->GetAreaCount(); ++i )
+        /*for( int i = 0; i < m_Pcb->GetAreaCount(); ++i )
         {
             view->Add( (KiGfx::VIEW_ITEM*) ( m_Pcb->GetArea( i ) ) );
         }
@@ -175,7 +175,7 @@ void PCB_BASE_FRAME::SetBoard( BOARD* aBoard )
         for( BOARD_ITEM* drawing = m_Pcb->m_Drawings; drawing; drawing = drawing->Next() )
         {
             view->Add( drawing );
-        }
+        }*/
 
         // Load tracks
         for( TRACK* track = m_Pcb->m_Track; track; track = track->Next() )
@@ -184,7 +184,7 @@ void PCB_BASE_FRAME::SetBoard( BOARD* aBoard )
         }
 
         // Load modules and its additional elements
-        for( MODULE* module = m_Pcb->m_Modules; module; module = module->Next() )
+        /*for( MODULE* module = m_Pcb->m_Modules; module; module = module->Next() )
         {
             // Load module's pads
             for( D_PAD* pad = module->Pads().GetFirst(); pad; pad = pad->Next() )
@@ -208,7 +208,7 @@ void PCB_BASE_FRAME::SetBoard( BOARD* aBoard )
         for( SEGZONE* zone = m_Pcb->m_Zone; zone; zone = zone->Next() )
         {
             view->Add( zone );
-        }
+        }*/
 
         // Apply layer coloring scheme & display options
         if( view->GetPainter() )