Changed the CAIRO_GAL class hierarchy
There is a dedicated class for display (CAIRO_GAL) and another one for printing. The common part has been moved to CAIRO_GAL_BASE.
This commit is contained in:
Maciej Suminski
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@ -3,6 +3,8 @@
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*
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* Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
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* Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
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* Copyright (C) 2017-2018 CERN
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* @author Maciej Suminski <maciej.suminski@cern.ch>
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*
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* CairoGal - Graphics Abstraction Layer for Cairo
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*
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@ -63,35 +65,12 @@ namespace KIGFX
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{
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class CAIRO_COMPOSITOR;
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class CAIRO_GAL : public GAL, public wxWindow
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class CAIRO_GAL_BASE : public GAL
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{
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public:
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/**
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* Constructor CAIRO_GAL
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*
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* @param aParent is the wxWidgets immediate wxWindow parent of this object.
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*
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* @param aMouseListener is the wxEvtHandler that should receive the mouse events,
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* this can be can be any wxWindow, but is often a wxFrame container.
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*
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* @param aPaintListener is the wxEvtHandler that should receive the paint
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* event. This can be any wxWindow, but is often a derived instance
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* of this class or a containing wxFrame. The "paint event" here is
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* a wxCommandEvent holding EVT_GAL_REDRAW, as sent by PostPaint().
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*
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* @param aName is the name of this window for use by wxWindow::FindWindowByName()
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*/
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CAIRO_GAL( GAL_DISPLAY_OPTIONS& aDisplayOptions,
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wxWindow* aParent, wxEvtHandler* aMouseListener = NULL,
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wxEvtHandler* aPaintListener = NULL, const wxString& aName = wxT( "CairoCanvas" ) );
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CAIRO_GAL_BASE( GAL_DISPLAY_OPTIONS& aDisplayOptions );
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virtual ~CAIRO_GAL();
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///> @copydoc GAL::IsVisible()
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bool IsVisible() const override
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{
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return IsShownOnScreen() && !GetClientRect().IsEmpty();
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}
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virtual ~CAIRO_GAL_BASE();
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// ---------------
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// Drawing methods
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@ -141,9 +120,6 @@ public:
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/// @brief Resizes the canvas.
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virtual void ResizeScreen( int aWidth, int aHeight ) override;
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/// @brief Shows/hides the GAL canvas
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virtual bool Show( bool aShow ) override;
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/// @copydoc GAL::Flush()
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virtual void Flush() override;
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@ -223,21 +199,6 @@ public:
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// Handling the world <-> screen transformation
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// --------------------------------------------------------
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/// @copydoc GAL::SaveScreen()
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virtual void SaveScreen() override;
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/// @copydoc GAL::RestoreScreen()
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virtual void RestoreScreen() override;
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/// @copydoc GAL::SetTarget()
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virtual void SetTarget( RENDER_TARGET aTarget ) override;
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/// @copydoc GAL::GetTarget()
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virtual RENDER_TARGET GetTarget() const override;
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/// @copydoc GAL::ClearTarget()
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virtual void ClearTarget( RENDER_TARGET aTarget ) override;
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/// @copydoc GAL::SetNegativeDrawMode()
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virtual void SetNegativeDrawMode( bool aSetting ) override;
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@ -248,53 +209,22 @@ public:
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/// @copydoc GAL::DrawCursor()
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virtual void DrawCursor( const VECTOR2D& aCursorPosition ) override;
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/**
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* Function PostPaint
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* posts an event to m_paint_listener. A post is used so that the actual drawing
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* function can use a device context type that is not specific to the wxEVT_PAINT event.
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*/
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void PostPaint()
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{
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if( paintListener )
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{
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wxPaintEvent redrawEvent;
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wxPostEvent( paintListener, redrawEvent );
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}
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}
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void SetMouseListener( wxEvtHandler* aMouseListener )
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{
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mouseListener = aMouseListener;
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}
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void SetPaintListener( wxEvtHandler* aPaintListener )
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{
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paintListener = aPaintListener;
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}
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virtual void EnableDepthTest( bool aEnabled = false ) override;
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protected:
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/// @copydoc GAL::BeginDrawing()
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virtual void beginDrawing() override;
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/// @copydoc GAL::EndDrawing()
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virtual void endDrawing() override;
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void resetContext();
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virtual void drawGridLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint ) override;
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private:
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/// Super class definition
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typedef GAL super;
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// Compositing variables
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std::shared_ptr<CAIRO_COMPOSITOR> compositor; ///< Object for layers compositing
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unsigned int mainBuffer; ///< Handle to the main buffer
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unsigned int overlayBuffer; ///< Handle to the overlay buffer
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RENDER_TARGET currentTarget; ///< Current rendering target
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bool validCompositor; ///< Compositor initialization flag
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// Variables related to wxWidgets
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wxWindow* parentWindow; ///< Parent window
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wxEvtHandler* mouseListener; ///< Mouse listener
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wxEvtHandler* paintListener; ///< Paint listener
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unsigned int bufferSize; ///< Size of buffers cairoOutput, bitmapBuffers
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unsigned char* wxOutput; ///< wxImage comaptible buffer
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/// Maximum number of arguments for one command
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static const int MAX_CAIRO_ARGUMENTS = 4;
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@ -337,52 +267,137 @@ private:
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unsigned int groupCounter; ///< Counter used for generating keys for groups
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GROUP* currentGroup; ///< Currently used group
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// Variables related to Cairo <-> wxWidgets
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cairo_matrix_t cairoWorldScreenMatrix; ///< Cairo world to screen transformation matrix
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cairo_t* currentContext; ///< Currently used Cairo context for drawing
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cairo_t* context; ///< Cairo image
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cairo_surface_t* surface; ///< Cairo surface
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void flushPath();
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void storePath(); ///< Store the actual path
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/**
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* @brief Blits cursor into the current screen.
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*/
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virtual void blitCursor( wxMemoryDC& clientDC );
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/// Drawing polygons & polylines is the same in cairo, so here is the common code
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void drawPoly( const std::deque<VECTOR2D>& aPointList );
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void drawPoly( const VECTOR2D aPointList[], int aListSize );
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void drawPoly( const SHAPE_LINE_CHAIN& aLineChain );
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/**
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* @brief Returns a valid key that can be used as a new group number.
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*
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* @return An unique group number that is not used by any other group.
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*/
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unsigned int getNewGroupNumber();
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/// Format used to store pixels
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static constexpr cairo_format_t GAL_FORMAT = CAIRO_FORMAT_RGB24;
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};
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class CAIRO_GAL : public CAIRO_GAL_BASE, public wxWindow
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{
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public:
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/**
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* Constructor CAIRO_GAL_BASE
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*
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* @param aParent is the wxWidgets immediate wxWindow parent of this object.
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*
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* @param aMouseListener is the wxEvtHandler that should receive the mouse events,
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* this can be can be any wxWindow, but is often a wxFrame container.
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*
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* @param aPaintListener is the wxEvtHandler that should receive the paint
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* event. This can be any wxWindow, but is often a derived instance
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* of this class or a containing wxFrame. The "paint event" here is
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* a wxCommandEvent holding EVT_GAL_REDRAW, as sent by PostPaint().
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*
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* @param aName is the name of this window for use by wxWindow::FindWindowByName()
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*/
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CAIRO_GAL( GAL_DISPLAY_OPTIONS& aDisplayOptions,
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wxWindow* aParent, wxEvtHandler* aMouseListener = NULL,
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wxEvtHandler* aPaintListener = NULL, const wxString& aName = wxT( "CairoCanvas" ) );
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virtual ~CAIRO_GAL();
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///> @copydoc GAL::IsVisible()
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bool IsVisible() const override
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{
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return IsShownOnScreen() && !GetClientRect().IsEmpty();
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}
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virtual void ResizeScreen( int aWidth, int aHeight ) override;
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virtual bool Show( bool aShow ) override;
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virtual void SaveScreen() override;
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virtual void RestoreScreen() override;
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virtual int BeginGroup() override;
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virtual void EndGroup() override;
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virtual void SetTarget( RENDER_TARGET aTarget ) override;
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virtual RENDER_TARGET GetTarget() const override;
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virtual void ClearTarget( RENDER_TARGET aTarget ) override;
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/**
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* Function PostPaint
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* posts an event to m_paint_listener. A post is used so that the actual drawing
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* function can use a device context type that is not specific to the wxEVT_PAINT event.
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*/
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void PostPaint()
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{
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if( paintListener )
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{
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wxPaintEvent redrawEvent;
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wxPostEvent( paintListener, redrawEvent );
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}
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}
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void SetMouseListener( wxEvtHandler* aMouseListener )
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{
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mouseListener = aMouseListener;
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}
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void SetPaintListener( wxEvtHandler* aPaintListener )
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{
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paintListener = aPaintListener;
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}
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protected:
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// Compositor related variables
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std::shared_ptr<CAIRO_COMPOSITOR> compositor; ///< Object for layers compositing
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unsigned int mainBuffer; ///< Handle to the main buffer
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unsigned int overlayBuffer; ///< Handle to the overlay buffer
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RENDER_TARGET currentTarget; ///< Current rendering target
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bool validCompositor; ///< Compositor initialization flag
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// Variables related to wxWidgets
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wxWindow* parentWindow; ///< Parent window
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wxEvtHandler* mouseListener; ///< Mouse listener
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wxEvtHandler* paintListener; ///< Paint listener
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unsigned int bufferSize; ///< Size of buffers cairoOutput, bitmapBuffers
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unsigned char* wxOutput; ///< wxImage comaptible buffer
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// Variables related to Cairo <-> wxWidgets
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unsigned int* bitmapBuffer; ///< Storage of the cairo image
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unsigned int* bitmapBufferBackup; ///< Backup storage of the cairo image
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int stride; ///< Stride value for Cairo
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int wxBufferWidth;
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bool isInitialized; ///< Are Cairo image & surface ready to use
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COLOR4D backgroundColor; ///< Background color
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int wxBufferWidth;
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/// @copydoc GAL::BeginDrawing()
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virtual void beginDrawing() override;
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/// @copydoc GAL::EndDrawing()
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virtual void endDrawing() override;
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///> Cairo-specific update handlers
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bool updatedGalDisplayOptions( const GAL_DISPLAY_OPTIONS& aOptions ) override;
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void flushPath();
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// Methods
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void storePath(); ///< Store the actual path
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// Event handlers
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/**
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* @brief Paint event handler.
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*
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* @param aEvent is the paint event.
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*/
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void onPaint( wxPaintEvent& aEvent );
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/**
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* @brief Mouse event handler, forwards the event to the child.
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*
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* @param aEvent is the mouse event to be forwarded.
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*/
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void skipMouseEvent( wxMouseEvent& aEvent );
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/**
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* @brief Blits cursor into the current screen.
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*/
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virtual void blitCursor( wxMemoryDC& clientDC );
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/// Prepare Cairo surfaces for drawing
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void initSurface();
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@ -398,24 +413,25 @@ private:
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/// Prepare the compositor
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void setCompositor();
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/// Drawing polygons & polylines is the same in cairo, so here is the common code
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void drawPoly( const std::deque<VECTOR2D>& aPointList );
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void drawPoly( const VECTOR2D aPointList[], int aListSize );
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void drawPoly( const SHAPE_LINE_CHAIN& aLineChain );
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// Event handlers
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/**
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* @brief Paint event handler.
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*
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* @param aEvent is the paint event.
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*/
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void onPaint( wxPaintEvent& aEvent );
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/**
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* @brief Returns a valid key that can be used as a new group number.
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* @brief Mouse event handler, forwards the event to the child.
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*
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* @return An unique group number that is not used by any other group.
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* @param aEvent is the mouse event to be forwarded.
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*/
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unsigned int getNewGroupNumber();
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void skipMouseEvent( wxMouseEvent& aEvent );
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/// Format used to store pixels
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static const cairo_format_t GAL_FORMAT = CAIRO_FORMAT_RGB24;
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///> Opacity of a single layer
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static const float LAYER_ALPHA;
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///> Cairo-specific update handlers
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bool updatedGalDisplayOptions( const GAL_DISPLAY_OPTIONS& aOptions ) override;
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};
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} // namespace KIGFX
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#endif // CAIROGAL_H_
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@ -640,6 +640,11 @@ public:
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worldUnitLength = aWorldUnitLength;
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}
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inline void SetScreenSize( const VECTOR2I& aSize )
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{
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screenSize = aSize;
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}
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/**
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* @brief Set the dots per inch of the screen.
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*
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