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/*
* 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;
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