kicad/include/basic_gal.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2016 Jean-Pierre Charras, jp.charras at wanadoo.fr
* Copyright (C) 1992-2016 KiCad Developers, see AUTHORS.txt for contributors.
*
* 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
*/
#ifndef BASIC_GAL_H
#define BASIC_GAL_H
#include <plot_common.h>
#include <class_eda_rect.h>
#include <gal/stroke_font.h>
#include <gal/graphics_abstraction_layer.h>
#include <newstroke_font.h>
/*
* class BASIC_GAL is a minimal GAL implementation to draw, plot and convert
* stroke texts to a set of segments for DRC tests, and to calculate text sizes.
*
* Currently it allows to use GAL and STROKE_FONT methods in legacy draw mode
* (using wxDC functions) in plot functions only for texts.
* It is used also to calculate the text bounding boxes
*
* The main purpose is to avoid duplicate code to do the same thing in GAL canvas
* legacy canvas, plotter canvas and DRC.
*
* It will be certainly removed when a full GAL canvas using wxDC is implemented
* (or at least restricted to plotter and DRC "canvas")
*/
struct TRANSFORM_PRM // A helper class to transform coordinates in BASIC_GAL canvas
{
VECTOR2D m_rotCenter;
VECTOR2D m_moveOffset;
double m_rotAngle;
};
class BASIC_GAL: public KIGFX::GAL
{
public:
wxDC* m_DC;
COLOR4D m_Color;
private:
TRANSFORM_PRM m_transform;
std::stack <TRANSFORM_PRM> m_transformHistory;
public:
BASIC_GAL( KIGFX::GAL_DISPLAY_OPTIONS& aDisplayOptions ) :
GAL( aDisplayOptions )
{
m_DC = NULL;
m_Color = RED;
m_plotter = NULL;
m_callback = NULL;
m_isClipped = false;
}
void SetPlotter( PLOTTER* aPlotter )
{
m_plotter = aPlotter;
}
void SetCallback( void (* aCallback)( int x0, int y0, int xf, int yf ) )
{
m_callback = aCallback;
}
/// Set a clip box for drawings
/// If NULL, no clip will be made
void SetClipBox( EDA_RECT* aClipBox )
{
m_isClipped = aClipBox != NULL;
if( aClipBox )
m_clipBox = *aClipBox;
}
/// @brief Save the context.
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virtual void Save() override
{
m_transformHistory.push( m_transform );
}
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virtual void Restore() override
{
m_transform = m_transformHistory.top();
m_transformHistory.pop();
}
/**
* @brief Draw a polyline
* @param aPointList is a list of 2D-Vectors containing the polyline points.
*/
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virtual void DrawPolyline( const std::deque<VECTOR2D>& aPointList ) override;
/** Start and end points are defined as 2D-Vectors.
* @param aStartPoint is the start point of the line.
* @param aEndPoint is the end point of the line.
*/
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virtual void DrawLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint ) override;
/**
* @brief Translate the context.
*
* @param aTranslation is the translation vector.
*/
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virtual void Translate( const VECTOR2D& aTranslation ) override
{
m_transform.m_moveOffset += aTranslation;
}
/**
* @brief Rotate the context.
*
* @param aAngle is the rotation angle in radians.
*/
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virtual void Rotate( double aAngle ) override
{
m_transform.m_rotAngle = aAngle;
m_transform.m_rotCenter = m_transform.m_moveOffset;
}
private:
// Apply the roation/translation transform to aPoint
const VECTOR2D transform( const VECTOR2D& aPoint ) const;
// A clip box, to clip drawings in a wxDC (mandatory to avoid draw issues)
EDA_RECT m_clipBox; // The clip box
bool m_isClipped; // Allows/disallows clipping
// When calling the draw functions outside a wxDC, to get the basic drawings
// lines / polylines ..., a callback function (used in DRC) to store
// coordinates of each segment:
void (* m_callback)( int x0, int y0, int xf, int yf );
// When calling the draw functions for plot, the plotter acts as a wxDC
// to plot basic items
PLOTTER* m_plotter;
};
extern BASIC_GAL basic_gal;
#endif // define BASIC_GAL_H