mirror of
https://gitlab.com/kicad/code/kicad.git
synced 2024-11-24 16:45:01 +00:00
539 lines
19 KiB
C++
539 lines
19 KiB
C++
/*
|
|
* 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) 2012-2024 KiCad Developers, see AUTHORS.txt for contributors.
|
|
* Copyright (C) 2017-2018 CERN
|
|
* @author Maciej Suminski <maciej.suminski@cern.ch>
|
|
*
|
|
* CairoGal - Graphics Abstraction Layer for Cairo
|
|
*
|
|
* 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 CAIROGAL_H_
|
|
#define CAIROGAL_H_
|
|
|
|
#include <map>
|
|
#include <iterator>
|
|
|
|
#include <cairo.h>
|
|
|
|
#include <gal/gal.h>
|
|
#include <gal/graphics_abstraction_layer.h>
|
|
#include <wx/dcbuffer.h>
|
|
|
|
#include <memory>
|
|
|
|
/**
|
|
* The Cairo implementation of the graphics abstraction layer.
|
|
*
|
|
* Quote from Wikipedia:
|
|
* " Cairo is a software library used to provide a vector graphics-based, device-independent
|
|
* API for software developers. It is designed to provide primitives for 2-dimensional
|
|
* drawing across a number of different backends. "
|
|
*
|
|
* Cairo offers also backends for PostScript and PDF surfaces. So it can be used for printing
|
|
* of KiCad graphics surfaces as well.
|
|
*/
|
|
namespace KIGFX
|
|
{
|
|
class CAIRO_COMPOSITOR;
|
|
|
|
class GAL_API CAIRO_GAL_BASE : public GAL
|
|
{
|
|
public:
|
|
CAIRO_GAL_BASE( GAL_DISPLAY_OPTIONS& aDisplayOptions );
|
|
|
|
~CAIRO_GAL_BASE();
|
|
|
|
bool IsCairoEngine() override { return true; }
|
|
|
|
// ---------------
|
|
// Drawing methods
|
|
// ---------------
|
|
|
|
/// @copydoc GAL::DrawLine()
|
|
void DrawLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint ) override;
|
|
|
|
/// @copydoc GAL::DrawSegment()
|
|
void DrawSegment( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint,
|
|
double aWidth ) override;
|
|
|
|
/// @copydoc GAL::DrawCircle()
|
|
void DrawCircle( const VECTOR2D& aCenterPoint, double aRadius ) override;
|
|
|
|
/// @copydoc GAL::DrawArc()
|
|
void DrawArc( const VECTOR2D& aCenterPoint, double aRadius, const EDA_ANGLE& aStartAngle,
|
|
const EDA_ANGLE& aAngle ) override;
|
|
|
|
/// @copydoc GAL::DrawArcSegment()
|
|
/// Note: aMaxError is not used in Cairo, because Cairo can draw true arcs
|
|
void DrawArcSegment( const VECTOR2D& aCenterPoint, double aRadius, const EDA_ANGLE& aStartAngle,
|
|
const EDA_ANGLE& aAngle, double aWidth, double aMaxError ) override;
|
|
|
|
/// @copydoc GAL::DrawRectangle()
|
|
void DrawRectangle( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint ) override;
|
|
|
|
/// @copydoc GAL::DrawSegmentChain()
|
|
void DrawSegmentChain( const std::vector<VECTOR2D>& aPointList, double aWidth ) override;
|
|
void DrawSegmentChain( const SHAPE_LINE_CHAIN& aLineChain, double aWidth ) override;
|
|
|
|
/// @copydoc GAL::DrawPolyline()
|
|
void DrawPolyline( const std::deque<VECTOR2D>& aPointList ) override { drawPoly( aPointList ); }
|
|
void DrawPolyline( const VECTOR2D aPointList[], int aListSize ) override
|
|
{
|
|
drawPoly( aPointList, aListSize );
|
|
}
|
|
|
|
void DrawPolyline( const SHAPE_LINE_CHAIN& aLineChain ) override { drawPoly( aLineChain ); }
|
|
|
|
/// @copydoc GAL::DrawPolylines()
|
|
void DrawPolylines( const std::vector<std::vector<VECTOR2D>>& aPointLists ) override
|
|
{
|
|
for( const std::vector<VECTOR2D>& points : aPointLists )
|
|
drawPoly( points );
|
|
}
|
|
|
|
/// @copydoc GAL::DrawPolygon()
|
|
void DrawPolygon( const std::deque<VECTOR2D>& aPointList ) override { drawPoly( aPointList ); }
|
|
void DrawPolygon( const VECTOR2D aPointList[], int aListSize ) override
|
|
{
|
|
drawPoly( aPointList, aListSize );
|
|
}
|
|
|
|
void DrawPolygon( const SHAPE_POLY_SET& aPolySet, bool aStrokeTriangulation = false ) override;
|
|
void DrawPolygon( const SHAPE_LINE_CHAIN& aPolySet ) override;
|
|
|
|
/// @copydoc GAL::DrawGlyph()
|
|
void DrawGlyph( const KIFONT::GLYPH& aPolySet, int aNth, int aTotal ) override;
|
|
|
|
/// @copydoc GAL::DrawGlyphs()
|
|
void DrawGlyphs( const std::vector<std::unique_ptr<KIFONT::GLYPH>>& aGlyphs ) override
|
|
{
|
|
for( size_t i = 0; i < aGlyphs.size(); i++ )
|
|
DrawGlyph( *aGlyphs[i], i, aGlyphs.size() );
|
|
}
|
|
|
|
/// @copydoc GAL::DrawCurve()
|
|
void DrawCurve( const VECTOR2D& startPoint, const VECTOR2D& controlPointA,
|
|
const VECTOR2D& controlPointB, const VECTOR2D& endPoint,
|
|
double aFilterValue = 0.0 ) override;
|
|
|
|
/// @copydoc GAL::DrawBitmap()
|
|
void DrawBitmap( const BITMAP_BASE& aBitmap, double alphaBlend = 1.0 ) override;
|
|
|
|
// --------------
|
|
// Screen methods
|
|
// --------------
|
|
|
|
/// Resizes the canvas.
|
|
void ResizeScreen( int aWidth, int aHeight ) override;
|
|
|
|
/// @copydoc GAL::Flush()
|
|
void Flush() override;
|
|
|
|
/// @copydoc GAL::ClearScreen()
|
|
void ClearScreen() override;
|
|
|
|
// -----------------
|
|
// Attribute setting
|
|
// -----------------
|
|
|
|
/// @copydoc GAL::SetIsFill()
|
|
void SetIsFill( bool aIsFillEnabled ) override;
|
|
|
|
/// @copydoc GAL::SetIsStroke()
|
|
void SetIsStroke( bool aIsStrokeEnabled ) override;
|
|
|
|
/// @copydoc GAL::SetStrokeColor()
|
|
void SetStrokeColor( const COLOR4D& aColor ) override;
|
|
|
|
/// @copydoc GAL::SetFillColor()
|
|
void SetFillColor( const COLOR4D& aColor ) override;
|
|
|
|
/// @copydoc GAL::SetLineWidth()
|
|
void SetLineWidth( float aLineWidth ) override;
|
|
|
|
/// @copydoc GAL::SetLayerDepth()
|
|
void SetLayerDepth( double aLayerDepth ) override;
|
|
|
|
// --------------
|
|
// Transformation
|
|
// --------------
|
|
|
|
/// @copydoc GAL::Transform()
|
|
void Transform( const MATRIX3x3D& aTransformation ) override;
|
|
|
|
/// @copydoc GAL::Rotate()
|
|
void Rotate( double aAngle ) override;
|
|
|
|
/// @copydoc GAL::Translate()
|
|
void Translate( const VECTOR2D& aTranslation ) override;
|
|
|
|
/// @copydoc GAL::Scale()
|
|
void Scale( const VECTOR2D& aScale ) override;
|
|
|
|
/// @copydoc GAL::Save()
|
|
void Save() override;
|
|
|
|
/// @copydoc GAL::Restore()
|
|
void Restore() override;
|
|
|
|
// --------------------------------------------
|
|
// Group methods
|
|
// ---------------------------------------------
|
|
|
|
/// @copydoc GAL::BeginGroup()
|
|
int BeginGroup() override;
|
|
|
|
/// @copydoc GAL::EndGroup()
|
|
void EndGroup() override;
|
|
|
|
/// @copydoc GAL::DrawGroup()
|
|
void DrawGroup( int aGroupNumber ) override;
|
|
|
|
/// @copydoc GAL::ChangeGroupColor()
|
|
void ChangeGroupColor( int aGroupNumber, const COLOR4D& aNewColor ) override;
|
|
|
|
/// @copydoc GAL::ChangeGroupDepth()
|
|
void ChangeGroupDepth( int aGroupNumber, int aDepth ) override;
|
|
|
|
/// @copydoc GAL::DeleteGroup()
|
|
void DeleteGroup( int aGroupNumber ) override;
|
|
|
|
/// @copydoc GAL::ClearCache()
|
|
void ClearCache() override;
|
|
|
|
// --------------------------------------------------------
|
|
// Handling the world <-> screen transformation
|
|
// --------------------------------------------------------
|
|
|
|
/// @copydoc GAL::SetNegativeDrawMode()
|
|
void SetNegativeDrawMode( bool aSetting ) override;
|
|
|
|
// -------
|
|
// Cursor
|
|
// -------
|
|
|
|
/// @copydoc GAL::DrawCursor()
|
|
void DrawCursor( const VECTOR2D& aCursorPosition ) override;
|
|
|
|
void EnableDepthTest( bool aEnabled = false ) override;
|
|
|
|
///< @copydoc GAL::DrawGrid()
|
|
void DrawGrid() override;
|
|
|
|
/// @copydoc GAL::BeginDrawing()
|
|
void BeginDrawing() override;
|
|
|
|
/// @copydoc GAL::EndDrawing()
|
|
void EndDrawing() override;
|
|
|
|
|
|
protected:
|
|
// Geometric transforms according to the m_currentWorld2Screen transform matrix:
|
|
double xform( double x ); // scale
|
|
const VECTOR2D xform( double x, double y ); // rotation, scale and offset
|
|
const VECTOR2D xform( const VECTOR2D& aP ); // rotation, scale and offset
|
|
|
|
// Return the scaling factor for current window.
|
|
virtual double getScalingFactor() { return 1.0; }
|
|
|
|
/**
|
|
* Transform according to the rotation from m_currentWorld2Screen transform matrix.
|
|
*
|
|
* @param aAngle is the angle in radians to transform.
|
|
* @return the modified angle.
|
|
*/
|
|
double angle_xform( double aAngle );
|
|
|
|
/**
|
|
* Transform according to the rotation from m_currentWorld2Screen transform matrix
|
|
* for the start angle and the end angle of an arc.
|
|
*
|
|
* @param aStartAngle is the arc starting point in radians to transform
|
|
* @param aEndAngle is the arc ending point in radians to transform
|
|
*/
|
|
void arc_angles_xform_and_normalize( double& aStartAngle, double& aEndAngle );
|
|
|
|
void resetContext();
|
|
|
|
/**
|
|
* Draw a grid line (usually a simplified line function).
|
|
*
|
|
* @param aStartPoint is the start point of the line.
|
|
* @param aEndPoint is the end point of the line.
|
|
*/
|
|
void drawGridLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint );
|
|
void drawGridCross( const VECTOR2D& aPoint );
|
|
void drawGridPoint( const VECTOR2D& aPoint, double aWidth, double aHeight );
|
|
void drawAxes( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint );
|
|
|
|
|
|
void flushPath();
|
|
void storePath(); ///< Store the actual path
|
|
|
|
/**
|
|
* Blit cursor into the current screen.
|
|
*/
|
|
void blitCursor( wxMemoryDC& clientDC );
|
|
|
|
/// Drawing polygons & polylines is the same in Cairo, so here is the common code
|
|
void drawPoly( const std::deque<VECTOR2D>& aPointList );
|
|
void drawPoly( const std::vector<VECTOR2D>& aPointList );
|
|
void drawPoly( const VECTOR2D aPointList[], int aListSize );
|
|
void drawPoly( const SHAPE_LINE_CHAIN& aLineChain );
|
|
|
|
/**
|
|
* Return a valid key that can be used as a new group number.
|
|
*
|
|
* @return An unique group number that is not used by any other group.
|
|
*/
|
|
unsigned int getNewGroupNumber();
|
|
|
|
void syncLineWidth( bool aForceWidth = false, double aWidth = 0.0 );
|
|
void updateWorldScreenMatrix();
|
|
const VECTOR2D roundp( const VECTOR2D& v );
|
|
|
|
/// Super class definition
|
|
typedef GAL super;
|
|
|
|
/// Maximum number of arguments for one command
|
|
static const int MAX_CAIRO_ARGUMENTS = 4;
|
|
|
|
/// Definitions for the command recorder
|
|
enum GRAPHICS_COMMAND
|
|
{
|
|
CMD_SET_FILL, ///< Enable/disable filling
|
|
CMD_SET_STROKE, ///< Enable/disable stroking
|
|
CMD_SET_FILLCOLOR, ///< Set the fill color
|
|
CMD_SET_STROKECOLOR, ///< Set the stroke color
|
|
CMD_SET_LINE_WIDTH, ///< Set the line width
|
|
CMD_STROKE_PATH, ///< Set the stroke path
|
|
CMD_FILL_PATH, ///< Set the fill path
|
|
//CMD_TRANSFORM, ///< Transform the actual context
|
|
CMD_ROTATE, ///< Rotate the context
|
|
CMD_TRANSLATE, ///< Translate the context
|
|
CMD_SCALE, ///< Scale the context
|
|
CMD_SAVE, ///< Save the transformation matrix
|
|
CMD_RESTORE, ///< Restore the transformation matrix
|
|
CMD_CALL_GROUP ///< Call a group
|
|
};
|
|
|
|
/// Type definition for an graphics group element
|
|
struct GROUP_ELEMENT
|
|
{
|
|
GRAPHICS_COMMAND m_Command; ///< Command to execute
|
|
union {
|
|
double DblArg[MAX_CAIRO_ARGUMENTS]; ///< Arguments for Cairo commands
|
|
bool BoolArg; ///< A bool argument
|
|
int IntArg = 0; ///< An int argument
|
|
} m_Argument;
|
|
cairo_path_t* m_CairoPath = nullptr; ///< Pointer to a Cairo path
|
|
};
|
|
|
|
typedef std::deque<GROUP_ELEMENT> GROUP; ///< A graphic group type definition
|
|
|
|
// Variables for the grouping function
|
|
bool m_isGrouping; ///< Is grouping enabled ?
|
|
bool m_isElementAdded; ///< Was an graphic element added ?
|
|
std::map<int, GROUP> m_groups; ///< List of graphic groups
|
|
unsigned int m_groupCounter; ///< Counter used for generating group keys
|
|
GROUP* m_currentGroup; ///< Currently used group
|
|
|
|
double m_lineWidthInPixels;
|
|
bool m_lineWidthIsOdd;
|
|
|
|
cairo_matrix_t m_cairoWorldScreenMatrix; ///< Cairo world to screen transform matrix
|
|
cairo_matrix_t m_currentXform;
|
|
cairo_matrix_t m_currentWorld2Screen;
|
|
cairo_t* m_currentContext; ///< Currently used Cairo context for drawing
|
|
cairo_t* m_context; ///< Cairo image
|
|
cairo_surface_t* m_surface; ///< Cairo surface
|
|
|
|
/// List of surfaces that were created by painting images, to be cleaned up later
|
|
std::vector<cairo_surface_t*> m_imageSurfaces;
|
|
|
|
std::vector<cairo_matrix_t> m_xformStack;
|
|
/// Format used to store pixels
|
|
static constexpr cairo_format_t GAL_FORMAT = CAIRO_FORMAT_ARGB32;
|
|
};
|
|
|
|
|
|
class GAL_API CAIRO_GAL : public CAIRO_GAL_BASE, public wxWindow
|
|
{
|
|
public:
|
|
/**
|
|
* @param aParent is the wxWidgets immediate wxWindow parent of this object.
|
|
* @param aMouseListener is the wxEvtHandler that should receive the mouse events, this
|
|
* can be can be any wxWindow, but is often a wxFrame container.
|
|
* @param aPaintListener is the wxEvtHandler that should receive the paint event. This
|
|
* can be any wxWindow, but is often a derived instance of this
|
|
* class or a containing wxFrame. The "paint event" here is a
|
|
* wxCommandEvent holding EVT_GAL_REDRAW, as sent by PostPaint().
|
|
*
|
|
* @param aName is the name of this window for use by wxWindow::FindWindowByName().
|
|
*/
|
|
CAIRO_GAL( GAL_DISPLAY_OPTIONS& aDisplayOptions, wxWindow* aParent,
|
|
wxEvtHandler* aMouseListener = nullptr, wxEvtHandler* aPaintListener = nullptr,
|
|
const wxString& aName = wxT( "CairoCanvas" ) );
|
|
|
|
~CAIRO_GAL();
|
|
|
|
///< @copydoc GAL::IsVisible()
|
|
bool IsVisible() const override
|
|
{
|
|
return IsShownOnScreen() && !GetClientRect().IsEmpty();
|
|
}
|
|
|
|
void ResizeScreen( int aWidth, int aHeight ) override;
|
|
|
|
bool Show( bool aShow ) override;
|
|
|
|
int BeginGroup() override;
|
|
|
|
void EndGroup() override;
|
|
|
|
void SetTarget( RENDER_TARGET aTarget ) override;
|
|
|
|
RENDER_TARGET GetTarget() const override;
|
|
|
|
void ClearTarget( RENDER_TARGET aTarget ) override;
|
|
|
|
/// @copydoc GAL::StartDiffLayer()
|
|
void StartDiffLayer() override;
|
|
|
|
/// @copydoc GAL::EndDiffLayer()
|
|
void EndDiffLayer() override;
|
|
|
|
/// @copydoc GAL::StartNegativesLayer()
|
|
void StartNegativesLayer() override;
|
|
|
|
/// @copydoc GAL::EndNegativesLayer()
|
|
void EndNegativesLayer() override;
|
|
|
|
/**
|
|
* Post an event to m_paint_listener.
|
|
*
|
|
* A post is used so that the actual drawing function can use a device context type that
|
|
* is not specific to the wxEVT_PAINT event, just by changing the PostPaint code.
|
|
*/
|
|
void PostPaint( wxPaintEvent& aEvent );
|
|
|
|
void SetMouseListener( wxEvtHandler* aMouseListener )
|
|
{
|
|
m_mouseListener = aMouseListener;
|
|
}
|
|
|
|
void SetPaintListener( wxEvtHandler* aPaintListener )
|
|
{
|
|
m_paintListener = aPaintListener;
|
|
}
|
|
|
|
/// @copydoc GAL::SetNativeCursorStyle()
|
|
bool SetNativeCursorStyle( KICURSOR aCursor, bool aHiDPI ) override;
|
|
|
|
/// @copydoc GAL::BeginDrawing()
|
|
void BeginDrawing() override;
|
|
|
|
/// @copydoc GAL::EndDrawing()
|
|
void EndDrawing() override;
|
|
|
|
protected:
|
|
|
|
/// Prepare Cairo surfaces for drawing
|
|
void initSurface();
|
|
|
|
/// Destroy Cairo surfaces when are not needed anymore
|
|
void deinitSurface();
|
|
|
|
/// Allocate the bitmaps for drawing
|
|
void allocateBitmaps();
|
|
|
|
/// Allocate the bitmaps for drawing
|
|
void deleteBitmaps();
|
|
|
|
/// Prepare the compositor
|
|
void setCompositor();
|
|
|
|
// Event handlers
|
|
/**
|
|
* Paint event handler.
|
|
*
|
|
* @param aEvent is the paint event.
|
|
*/
|
|
void onPaint( wxPaintEvent& aEvent );
|
|
|
|
/**
|
|
* Mouse event handler, forwards the event to the child.
|
|
*
|
|
* @param aEvent is the mouse event to be forwarded.
|
|
*/
|
|
void skipMouseEvent( wxMouseEvent& aEvent );
|
|
|
|
/**
|
|
* Skip the gesture event to the parent.
|
|
*
|
|
* @param aEvent is the gesture event.
|
|
*/
|
|
void skipGestureEvent( wxGestureEvent& aEvent );
|
|
|
|
/**
|
|
* Give the correct cursor image when the native widget asks for it.
|
|
*
|
|
* @param aEvent is the cursor event to plac the cursor into.
|
|
*/
|
|
void onSetNativeCursor( wxSetCursorEvent& aEvent );
|
|
|
|
///< Cairo-specific update handlers
|
|
bool updatedGalDisplayOptions( const GAL_DISPLAY_OPTIONS& aOptions ) override;
|
|
|
|
///< For HiDPI support
|
|
double getScalingFactor() override;
|
|
|
|
protected:
|
|
// Compositor related variables
|
|
std::shared_ptr<CAIRO_COMPOSITOR> m_compositor; ///< Object for layers compositing
|
|
unsigned int m_mainBuffer; ///< Handle to the main buffer
|
|
unsigned int m_overlayBuffer; ///< Handle to the overlay buffer
|
|
unsigned int m_tempBuffer; ///< Handle to the temp buffer
|
|
unsigned int m_savedBuffer; ///< Handle to buffer to restore after rendering to temp buffer
|
|
RENDER_TARGET m_currentTarget; ///< Current rendering target
|
|
bool m_validCompositor; ///< Compositor initialization flag
|
|
|
|
// Variables related to wxWidgets
|
|
wxWindow* m_parentWindow; ///< Parent window
|
|
wxEvtHandler* m_mouseListener; ///< Mouse listener
|
|
wxEvtHandler* m_paintListener; ///< Paint listener
|
|
unsigned int m_bufferSize; ///< Size of buffers cairoOutput, bitmapBuffers
|
|
wxBitmap* m_wxBitmap; ///< Output buffer bitmap
|
|
|
|
// Variables related to Cairo <-> wxWidgets
|
|
unsigned char* m_bitmapBuffer; ///< Storage of the Cairo image
|
|
int m_stride; ///< Stride value for Cairo
|
|
int m_wxBufferWidth;
|
|
bool m_isInitialized; ///< Are Cairo image & surface ready to use
|
|
COLOR4D m_backgroundColor; ///< Background color
|
|
wxCursor m_currentwxCursor; ///< wxCursor showing the current native cursor
|
|
};
|
|
|
|
} // namespace KIGFX
|
|
|
|
#endif // CAIROGAL_H_
|