Merge pull request #4 from FOSSEE/develop

merging dev into master

1 files changed, 240 insertions, 0 deletions

diff --git a/common/gal/graphics_abstraction_layer.cpp b/common/gal/graphics_abstraction_layer.cpp
new file mode 100644
index 0000000..d9e9eac
--- /dev/null
+++ b/common/gal/graphics_abstraction_layer.cpp
@@ -0,0 +1,240 @@
+/*
+ * 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>
+
+using namespace KIGFX;
+
+
+const double GAL::METRIC_UNIT_LENGTH = 1e9;
+
+
+GAL::GAL() :
+    strokeFont( this )
+{
+    // Set the default values for the internal variables
+    SetIsFill( false );
+    SetIsStroke( true );
+    SetFillColor( COLOR4D( 0.0, 0.0, 0.0, 0.0 ) );
+    SetStrokeColor( COLOR4D( 1.0, 1.0, 1.0, 1.0 ) );
+    SetLookAtPoint( VECTOR2D( 0, 0 ) );
+    SetZoomFactor( 1.0 );
+    SetWorldUnitLength( 1.0 / METRIC_UNIT_LENGTH * 2.54 );   // 1 inch in nanometers
+    SetScreenDPI( 106 );                                     // Display resolution setting
+    SetDepthRange( VECTOR2D( GAL::MIN_DEPTH, GAL::MAX_DEPTH ) );
+    SetLayerDepth( 0.0 );
+    SetFlip( false, false );
+    SetLineWidth( 1.0 );
+    ComputeWorldScale();
+
+    // Set grid defaults
+    SetGridVisibility( true );
+    SetGridStyle( GRID_STYLE_LINES );
+    SetGridDrawThreshold( 10 );
+    SetCoarseGrid( 10 );
+    SetGridLineWidth( 0.5 );
+
+    // Initialize the cursor shape
+    SetCursorColor( COLOR4D( 1.0, 1.0, 1.0, 1.0 ) );
+    SetCursorSize( 80 );
+    SetCursorEnabled( false );
+
+    strokeFont.LoadNewStrokeFont( newstroke_font, newstroke_font_bufsize );
+}
+
+
+GAL::~GAL()
+{
+}
+
+
+void GAL::SetTextAttributes( const EDA_TEXT* aText )
+{
+    strokeFont.SetGlyphSize( VECTOR2D( aText->GetSize() ) );
+    strokeFont.SetHorizontalJustify( aText->GetHorizJustify() );
+    strokeFont.SetVerticalJustify( aText->GetVertJustify() );
+    strokeFont.SetBold( aText->IsBold() );
+    strokeFont.SetItalic( aText->IsItalic() );
+    strokeFont.SetMirrored( aText->IsMirrored() );
+}
+
+
+void GAL::ComputeWorldScreenMatrix()
+{
+    ComputeWorldScale();
+
+    worldScreenMatrix.SetIdentity();
+
+    MATRIX3x3D translation;
+    translation.SetIdentity();
+    translation.SetTranslation( 0.5 * VECTOR2D( screenSize ) );
+
+    MATRIX3x3D scale;
+    scale.SetIdentity();
+    scale.SetScale( VECTOR2D( worldScale, worldScale ) );
+
+    MATRIX3x3D flip;
+    flip.SetIdentity();
+    flip.SetScale( VECTOR2D( flipX, flipY ) );
+
+    MATRIX3x3D lookat;
+    lookat.SetIdentity();
+    lookat.SetTranslation( -lookAtPoint );
+
+    worldScreenMatrix = translation * flip * scale * lookat * worldScreenMatrix;
+    screenWorldMatrix = worldScreenMatrix.Inverse();
+}
+
+
+void GAL::DrawGrid()
+{
+    if( !gridVisibility )
+        return;
+
+    SetTarget( TARGET_NONCACHED );
+
+    // Draw the grid
+    // For the drawing the start points, end points and increments have
+    // to be calculated in world coordinates
+    VECTOR2D worldStartPoint = screenWorldMatrix * VECTOR2D( 0.0, 0.0 );
+    VECTOR2D worldEndPoint   = screenWorldMatrix * VECTOR2D( screenSize );
+
+    int gridScreenSizeDense  = KiROUND( gridSize.x * worldScale );
+    int gridScreenSizeCoarse = KiROUND( gridSize.x * static_cast<double>( gridTick ) * worldScale );
+
+    // Compute the line marker or point radius of the grid
+    double marker = 2.0 * gridLineWidth / worldScale;
+    double doubleMarker = 2.0 * marker;
+
+    // Check if the grid would not be too dense
+    if( std::max( gridScreenSizeDense, gridScreenSizeCoarse ) > gridDrawThreshold )
+    {
+        // Compute grid variables
+        int gridStartX  = KiROUND( worldStartPoint.x / gridSize.x );
+        int gridEndX    = KiROUND( worldEndPoint.x / gridSize.x );
+        int gridStartY  = KiROUND( worldStartPoint.y / gridSize.y );
+        int gridEndY    = KiROUND( worldEndPoint.y / gridSize.y );
+
+        assert( gridEndX >= gridStartX );
+        assert( gridEndY >= gridStartY );
+
+        // Correct the index, else some lines are not correctly painted
+        gridStartX -= std::abs( gridOrigin.x / gridSize.x ) + 1;
+        gridStartY -= std::abs( gridOrigin.y / gridSize.y ) + 1;
+        gridEndX += std::abs( gridOrigin.x / gridSize.x ) + 1;
+        gridEndY += std::abs( gridOrigin.y / gridSize.y ) + 1;
+
+        // Draw the grid behind all other layers
+        SetLayerDepth( depthRange.y * 0.75 );
+
+        if( gridStyle == GRID_STYLE_LINES )
+        {
+            SetIsFill( false );
+            SetIsStroke( true );
+            SetStrokeColor( gridColor );
+
+            // Now draw the grid, every coarse grid line gets the double width
+
+            // Vertical lines
+            for( int j = gridStartY; j < gridEndY; j += 1 )
+            {
+                if( j % gridTick == 0 && gridScreenSizeDense > gridDrawThreshold )
+                    SetLineWidth( doubleMarker );
+                else
+                    SetLineWidth( marker );
+
+                if( ( j % gridTick == 0 && gridScreenSizeCoarse > gridDrawThreshold )
+                    || gridScreenSizeDense > gridDrawThreshold )
+                {
+                    drawGridLine( VECTOR2D( gridStartX * gridSize.x, j * gridSize.y + gridOrigin.y ),
+                                  VECTOR2D( gridEndX * gridSize.x,   j * gridSize.y + gridOrigin.y ) );
+                }
+            }
+
+            // Horizontal lines
+            for( int i = gridStartX; i < gridEndX; i += 1 )
+            {
+                if( i % gridTick == 0 && gridScreenSizeDense > gridDrawThreshold )
+                    SetLineWidth( doubleMarker );
+                else
+                    SetLineWidth( marker );
+
+                if( ( i % gridTick == 0 && gridScreenSizeCoarse > gridDrawThreshold )
+                    || gridScreenSizeDense > gridDrawThreshold )
+                {
+                    drawGridLine( VECTOR2D( i * gridSize.x + gridOrigin.x, gridStartY * gridSize.y ),
+                                  VECTOR2D( i * gridSize.x + gridOrigin.x, gridEndY * gridSize.y ) );
+                }
+            }
+        }
+        else    // Dotted grid
+        {
+            bool tickX, tickY;
+            SetIsFill( true );
+            SetIsStroke( false );
+            SetFillColor( gridColor );
+
+            for( int j = gridStartY; j < gridEndY; j += 1 )
+            {
+                if( j % gridTick == 0 && gridScreenSizeDense > gridDrawThreshold )
+                    tickY = true;
+                else
+                    tickY = false;
+
+                for( int i = gridStartX; i < gridEndX; i += 1 )
+                {
+                    if( i % gridTick == 0 && gridScreenSizeDense > gridDrawThreshold )
+                        tickX = true;
+                    else
+                        tickX = false;
+
+                    if( tickX || tickY || gridScreenSizeDense > gridDrawThreshold )
+                    {
+                        double radius = ( tickX && tickY ) ? doubleMarker : marker;
+                        DrawRectangle( VECTOR2D( i * gridSize.x - radius + gridOrigin.x,
+                                                 j * gridSize.y - radius + gridOrigin.y ),
+                                       VECTOR2D( i * gridSize.x + radius + gridOrigin.x,
+                                                 j * gridSize.y + radius + gridOrigin.y ) );
+                    }
+                }
+            }
+        }
+    }
+}
+
+
+VECTOR2D GAL::GetGridPoint( const VECTOR2D& aPoint ) const
+{
+    return VECTOR2D( KiROUND( ( aPoint.x - gridOffset.x ) / gridSize.x ) * gridSize.x + gridOffset.x,
+                     KiROUND( ( aPoint.y - gridOffset.y ) / gridSize.y ) * gridSize.y + gridOffset.y );
+}
+
+const int GAL::MIN_DEPTH = -1024;
+const int GAL::MAX_DEPTH = 1023;
+const int GAL::GRID_DEPTH = MAX_DEPTH - 1;