Merge pull request #4 from FOSSEE/develop

merging dev into master

1 files changed, 234 insertions, 0 deletions

diff --git a/common/gal/opengl/vertex_manager.cpp b/common/gal/opengl/vertex_manager.cpp
new file mode 100644
index 0000000..d055b52
--- /dev/null
+++ b/common/gal/opengl/vertex_manager.cpp
@@ -0,0 +1,234 @@
+/*
+ * 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 vertex_manager.cpp
+ * @brief Class to control vertex container and GPU with possibility of emulating old-style OpenGL
+ * 1.0 state machine using modern OpenGL methods.
+ */
+
+#include <gal/opengl/vertex_manager.h>
+#include <gal/opengl/cached_container.h>
+#include <gal/opengl/noncached_container.h>
+#include <gal/opengl/gpu_manager.h>
+#include <gal/opengl/vertex_item.h>
+#include <confirm.h>
+
+using namespace KIGFX;
+
+VERTEX_MANAGER::VERTEX_MANAGER( bool aCached ) :
+    m_noTransform( true ), m_transform( 1.0f )
+{
+    m_container.reset( VERTEX_CONTAINER::MakeContainer( aCached ) );
+    m_gpu.reset( GPU_MANAGER::MakeManager( m_container.get() ) );
+
+    // There is no shader used by default
+    for( unsigned int i = 0; i < ShaderStride; ++i )
+        m_shader[i] = 0.0f;
+}
+
+
+void VERTEX_MANAGER::Vertex( GLfloat aX, GLfloat aY, GLfloat aZ ) const
+{
+    // flag to avoid hanging by calling DisplayError too many times:
+    static bool show_err = true;
+
+    // Obtain the pointer to the vertex in the currently used container
+    VERTEX* newVertex = m_container->Allocate( 1 );
+
+    if( newVertex == NULL )
+    {
+        if( show_err )
+        {
+            DisplayError( NULL, wxT( "VERTEX_MANAGER::Vertex: Vertex allocation error" ) );
+            show_err = false;
+        }
+
+        return;
+    }
+
+    putVertex( *newVertex, aX, aY, aZ );
+}
+
+
+void VERTEX_MANAGER::Vertices( const VERTEX aVertices[], unsigned int aSize ) const
+{
+    // flag to avoid hanging by calling DisplayError too many times:
+    static bool show_err = true;
+
+    // Obtain pointer to the vertex in currently used container
+    VERTEX* newVertex = m_container->Allocate( aSize );
+
+    if( newVertex == NULL )
+    {
+        if( show_err )
+        {
+            DisplayError( NULL, wxT( "VERTEX_MANAGER::Vertices: Vertex allocation error" ) );
+            show_err = false;
+        }
+
+        return;
+    }
+
+    // Put vertices in already allocated memory chunk
+    for( unsigned int i = 0; i < aSize; ++i )
+    {
+        putVertex( newVertex[i], aVertices[i].x, aVertices[i].y, aVertices[i].z );
+    }
+}
+
+
+void VERTEX_MANAGER::SetItem( VERTEX_ITEM& aItem ) const
+{
+    m_container->SetItem( &aItem );
+}
+
+
+void VERTEX_MANAGER::FinishItem() const
+{
+    m_container->FinishItem();
+}
+
+
+void VERTEX_MANAGER::FreeItem( VERTEX_ITEM& aItem ) const
+{
+    m_container->Delete( &aItem );
+}
+
+
+void VERTEX_MANAGER::ChangeItemColor( const VERTEX_ITEM& aItem, const COLOR4D& aColor ) const
+{
+    unsigned int size   = aItem.GetSize();
+    unsigned int offset = aItem.GetOffset();
+
+    VERTEX* vertex = m_container->GetVertices( offset );
+
+    for( unsigned int i = 0; i < size; ++i )
+    {
+        vertex->r = aColor.r * 255.0;
+        vertex->g = aColor.g * 255.0;
+        vertex->b = aColor.b * 255.0;
+        vertex->a = aColor.a * 255.0;
+        vertex++;
+    }
+
+    m_container->SetDirty();
+}
+
+
+void VERTEX_MANAGER::ChangeItemDepth( const VERTEX_ITEM& aItem, GLfloat aDepth ) const
+{
+    unsigned int size   = aItem.GetSize();
+    unsigned int offset = aItem.GetOffset();
+
+    VERTEX* vertex = m_container->GetVertices( offset );
+
+    for( unsigned int i = 0; i < size; ++i )
+    {
+        vertex->z = aDepth;
+        vertex++;
+    }
+
+    m_container->SetDirty();
+}
+
+
+VERTEX* VERTEX_MANAGER::GetVertices( const VERTEX_ITEM& aItem ) const
+{
+    if( aItem.GetSize() == 0 )
+        return NULL; // The item is not stored in the container
+
+    return m_container->GetVertices( aItem.GetOffset() );
+}
+
+
+void VERTEX_MANAGER::SetShader( SHADER& aShader ) const
+{
+    m_gpu->SetShader( aShader );
+}
+
+
+void VERTEX_MANAGER::Clear() const
+{
+    m_container->Clear();
+}
+
+
+void VERTEX_MANAGER::BeginDrawing() const
+{
+    m_gpu->BeginDrawing();
+}
+
+
+void VERTEX_MANAGER::DrawItem( const VERTEX_ITEM& aItem ) const
+{
+    int size = aItem.GetSize();
+
+    if( size > 0 )
+    {
+        int offset = aItem.GetOffset();
+        m_gpu->DrawIndices( offset, size );
+    }
+}
+
+
+void VERTEX_MANAGER::EndDrawing() const
+{
+    m_gpu->EndDrawing();
+}
+
+
+void VERTEX_MANAGER::putVertex( VERTEX& aTarget, GLfloat aX, GLfloat aY, GLfloat aZ ) const
+{
+    // Modify the vertex according to the currently used transformations
+    if( m_noTransform )
+    {
+        // Simply copy coordinates, when the transform matrix is the identity matrix
+        aTarget.x = aX;
+        aTarget.y = aY;
+        aTarget.z = aZ;
+    }
+    else
+    {
+        // Apply transformations
+        glm::vec4 transVertex( aX, aY, aZ, 1.0f );
+        transVertex = m_transform * transVertex;
+
+        aTarget.x = transVertex.x;
+        aTarget.y = transVertex.y;
+        aTarget.z = transVertex.z;
+    }
+
+    // Apply currently used color
+    aTarget.r = m_color[0];
+    aTarget.g = m_color[1];
+    aTarget.b = m_color[2];
+    aTarget.a = m_color[3];
+
+    // Apply currently used shader
+    for( unsigned int j = 0; j < ShaderStride; ++j )
+    {
+        aTarget.shader[j] = m_shader[j];
+    }
+}