417 lines
15 KiB
C++
417 lines
15 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 Kicad Developers, see change_log.txt for contributors.
|
|
*
|
|
* 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/graphics_abstraction_layer.h>
|
|
#include <wx/dcbuffer.h>
|
|
|
|
#include <memory>
|
|
|
|
#if defined(__WXMSW__)
|
|
#define SCREEN_DEPTH 24
|
|
#else
|
|
#if wxCHECK_VERSION( 2, 9, 0 )
|
|
#define SCREEN_DEPTH wxBITMAP_SCREEN_DEPTH
|
|
#else
|
|
#define SCREEN_DEPTH 32
|
|
#endif
|
|
#endif
|
|
|
|
/**
|
|
* @brief Class CAIRO_GAL is 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. "
|
|
* <br>
|
|
* 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 CAIRO_GAL : public GAL, public wxWindow
|
|
{
|
|
public:
|
|
/**
|
|
* Constructor CAIRO_GAL
|
|
*
|
|
* @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( wxWindow* aParent, wxEvtHandler* aMouseListener = NULL,
|
|
wxEvtHandler* aPaintListener = NULL, const wxString& aName = wxT( "CairoCanvas" ) );
|
|
|
|
virtual ~CAIRO_GAL();
|
|
|
|
///> @copydoc GAL::IsVisible()
|
|
bool IsVisible() const override {
|
|
return IsShownOnScreen();
|
|
}
|
|
|
|
// ---------------
|
|
// Drawing methods
|
|
// ---------------
|
|
|
|
/// @copydoc GAL::BeginDrawing()
|
|
virtual void BeginDrawing() override;
|
|
|
|
/// @copydoc GAL::EndDrawing()
|
|
virtual void EndDrawing() override;
|
|
|
|
/// @copydoc GAL::DrawLine()
|
|
virtual void DrawLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint ) override;
|
|
|
|
/// @copydoc GAL::DrawSegment()
|
|
virtual void DrawSegment( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint, double aWidth ) override;
|
|
|
|
/// @copydoc GAL::DrawCircle()
|
|
virtual void DrawCircle( const VECTOR2D& aCenterPoint, double aRadius ) override;
|
|
|
|
/// @copydoc GAL::DrawArc()
|
|
virtual void DrawArc( const VECTOR2D& aCenterPoint, double aRadius,
|
|
double aStartAngle, double aEndAngle ) override;
|
|
|
|
/// @copydoc GAL::DrawRectangle()
|
|
virtual void DrawRectangle( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint ) override;
|
|
|
|
/// @copydoc GAL::DrawPolyline()
|
|
virtual void DrawPolyline( const std::deque<VECTOR2D>& aPointList ) override { drawPoly( aPointList ); }
|
|
virtual void DrawPolyline( const VECTOR2D aPointList[], int aListSize ) override { drawPoly( aPointList, aListSize ); }
|
|
|
|
/// @copydoc GAL::DrawPolygon()
|
|
virtual void DrawPolygon( const std::deque<VECTOR2D>& aPointList ) override { drawPoly( aPointList ); }
|
|
virtual void DrawPolygon( const VECTOR2D aPointList[], int aListSize ) override { drawPoly( aPointList, aListSize ); }
|
|
|
|
/// @copydoc GAL::DrawCurve()
|
|
virtual void DrawCurve( const VECTOR2D& startPoint, const VECTOR2D& controlPointA,
|
|
const VECTOR2D& controlPointB, const VECTOR2D& endPoint ) override;
|
|
|
|
// --------------
|
|
// Screen methods
|
|
// --------------
|
|
|
|
/// @brief Resizes the canvas.
|
|
virtual void ResizeScreen( int aWidth, int aHeight ) override;
|
|
|
|
/// @brief Shows/hides the GAL canvas
|
|
virtual bool Show( bool aShow ) override;
|
|
|
|
/// @copydoc GAL::Flush()
|
|
virtual void Flush() override;
|
|
|
|
/// @copydoc GAL::ClearScreen()
|
|
virtual void ClearScreen( const COLOR4D& aColor ) override;
|
|
|
|
// -----------------
|
|
// Attribute setting
|
|
// -----------------
|
|
|
|
/// @copydoc GAL::SetIsFill()
|
|
virtual void SetIsFill( bool aIsFillEnabled ) override;
|
|
|
|
/// @copydoc GAL::SetIsStroke()
|
|
virtual void SetIsStroke( bool aIsStrokeEnabled ) override;
|
|
|
|
/// @copydoc GAL::SetStrokeColor()
|
|
virtual void SetStrokeColor( const COLOR4D& aColor ) override;
|
|
|
|
/// @copydoc GAL::SetFillColor()
|
|
virtual void SetFillColor( const COLOR4D& aColor ) override;
|
|
|
|
/// @copydoc GAL::SetLineWidth()
|
|
virtual void SetLineWidth( double aLineWidth ) override;
|
|
|
|
/// @copydoc GAL::SetLayerDepth()
|
|
virtual void SetLayerDepth( double aLayerDepth ) override;
|
|
|
|
// --------------
|
|
// Transformation
|
|
// --------------
|
|
|
|
/// @copydoc GAL::Transform()
|
|
virtual void Transform( const MATRIX3x3D& aTransformation ) override;
|
|
|
|
/// @copydoc GAL::Rotate()
|
|
virtual void Rotate( double aAngle ) override;
|
|
|
|
/// @copydoc GAL::Translate()
|
|
virtual void Translate( const VECTOR2D& aTranslation ) override;
|
|
|
|
/// @copydoc GAL::Scale()
|
|
virtual void Scale( const VECTOR2D& aScale ) override;
|
|
|
|
/// @copydoc GAL::Save()
|
|
virtual void Save() override;
|
|
|
|
/// @copydoc GAL::Restore()
|
|
virtual void Restore() override;
|
|
|
|
// --------------------------------------------
|
|
// Group methods
|
|
// ---------------------------------------------
|
|
|
|
/// @copydoc GAL::BeginGroup()
|
|
virtual int BeginGroup() override;
|
|
|
|
/// @copydoc GAL::EndGroup()
|
|
virtual void EndGroup() override;
|
|
|
|
/// @copydoc GAL::DrawGroup()
|
|
virtual void DrawGroup( int aGroupNumber ) override;
|
|
|
|
/// @copydoc GAL::ChangeGroupColor()
|
|
virtual void ChangeGroupColor( int aGroupNumber, const COLOR4D& aNewColor ) override;
|
|
|
|
/// @copydoc GAL::ChangeGroupDepth()
|
|
virtual void ChangeGroupDepth( int aGroupNumber, int aDepth ) override;
|
|
|
|
/// @copydoc GAL::DeleteGroup()
|
|
virtual void DeleteGroup( int aGroupNumber ) override;
|
|
|
|
/// @copydoc GAL::ClearCache()
|
|
virtual void ClearCache() override;
|
|
|
|
// --------------------------------------------------------
|
|
// Handling the world <-> screen transformation
|
|
// --------------------------------------------------------
|
|
|
|
/// @copydoc GAL::SaveScreen()
|
|
virtual void SaveScreen() override;
|
|
|
|
/// @copydoc GAL::RestoreScreen()
|
|
virtual void RestoreScreen() override;
|
|
|
|
/// @copydoc GAL::SetTarget()
|
|
virtual void SetTarget( RENDER_TARGET aTarget ) override;
|
|
|
|
/// @copydoc GAL::GetTarget()
|
|
virtual RENDER_TARGET GetTarget() const override;
|
|
|
|
/// @copydoc GAL::ClearTarget()
|
|
virtual void ClearTarget( RENDER_TARGET aTarget ) override;
|
|
|
|
// -------
|
|
// Cursor
|
|
// -------
|
|
|
|
/// @copydoc GAL::SetCursorSize()
|
|
virtual void SetCursorSize( unsigned int aCursorSize ) override;
|
|
|
|
/// @copydoc GAL::DrawCursor()
|
|
virtual void DrawCursor( const VECTOR2D& aCursorPosition ) override;
|
|
|
|
/**
|
|
* Function PostPaint
|
|
* posts 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.
|
|
*/
|
|
void PostPaint()
|
|
{
|
|
if( paintListener )
|
|
{
|
|
wxPaintEvent redrawEvent;
|
|
wxPostEvent( paintListener, redrawEvent );
|
|
}
|
|
}
|
|
|
|
void SetMouseListener( wxEvtHandler* aMouseListener )
|
|
{
|
|
mouseListener = aMouseListener;
|
|
}
|
|
|
|
void SetPaintListener( wxEvtHandler* aPaintListener )
|
|
{
|
|
paintListener = aPaintListener;
|
|
}
|
|
|
|
protected:
|
|
virtual void drawGridLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint ) override;
|
|
|
|
private:
|
|
/// Super class definition
|
|
typedef GAL super;
|
|
|
|
// Compositing variables
|
|
std::shared_ptr<CAIRO_COMPOSITOR> compositor; ///< Object for layers compositing
|
|
unsigned int mainBuffer; ///< Handle to the main buffer
|
|
unsigned int overlayBuffer; ///< Handle to the overlay buffer
|
|
RENDER_TARGET currentTarget; ///< Current rendering target
|
|
bool validCompositor; ///< Compositor initialization flag
|
|
|
|
// Variables related to wxWidgets
|
|
wxWindow* parentWindow; ///< Parent window
|
|
wxEvtHandler* mouseListener; ///< Mouse listener
|
|
wxEvtHandler* paintListener; ///< Paint listener
|
|
unsigned int bufferSize; ///< Size of buffers cairoOutput, bitmapBuffers
|
|
unsigned char* wxOutput; ///< wxImage comaptible buffer
|
|
|
|
// Cursor variables
|
|
std::deque<wxColour> savedCursorPixels; ///< Saved pixels of the cursor
|
|
bool isDeleteSavedPixels; ///< True, if the saved pixels can be discarded
|
|
wxPoint savedCursorPosition; ///< The last cursor position
|
|
wxBitmap* cursorPixels; ///< Cursor pixels
|
|
wxBitmap* cursorPixelsSaved; ///< Saved cursor pixels
|
|
|
|
/// 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
|
|
typedef struct
|
|
{
|
|
GRAPHICS_COMMAND command; ///< Command to execute
|
|
union {
|
|
double dblArg[MAX_CAIRO_ARGUMENTS]; ///< Arguments for Cairo commands
|
|
bool boolArg; ///< A bool argument
|
|
int intArg; ///< An int argument
|
|
} argument;
|
|
cairo_path_t* cairoPath; ///< Pointer to a Cairo path
|
|
} GROUP_ELEMENT;
|
|
|
|
// Variables for the grouping function
|
|
bool isGrouping; ///< Is grouping enabled ?
|
|
bool isElementAdded; ///< Was an graphic element added ?
|
|
typedef std::deque<GROUP_ELEMENT> GROUP; ///< A graphic group type definition
|
|
std::map<int, GROUP> groups; ///< List of graphic groups
|
|
unsigned int groupCounter; ///< Counter used for generating keys for groups
|
|
GROUP* currentGroup; ///< Currently used group
|
|
|
|
// Variables related to Cairo <-> wxWidgets
|
|
cairo_matrix_t cairoWorldScreenMatrix; ///< Cairo world to screen transformation matrix
|
|
cairo_t* currentContext; ///< Currently used Cairo context for drawing
|
|
cairo_t* context; ///< Cairo image
|
|
cairo_surface_t* surface; ///< Cairo surface
|
|
unsigned int* bitmapBuffer; ///< Storage of the cairo image
|
|
unsigned int* bitmapBufferBackup; ///< Backup storage of the cairo image
|
|
int stride; ///< Stride value for Cairo
|
|
bool isInitialized; ///< Are Cairo image & surface ready to use
|
|
COLOR4D backgroundColor; ///< Background color
|
|
|
|
int wxBufferWidth;
|
|
|
|
void flushPath();
|
|
// Methods
|
|
void storePath(); ///< Store the actual path
|
|
|
|
// Event handlers
|
|
/**
|
|
* @brief Paint event handler.
|
|
*
|
|
* @param aEvent is the paint event.
|
|
*/
|
|
void onPaint( wxPaintEvent& aEvent );
|
|
|
|
/**
|
|
* @brief Mouse event handler, forwards the event to the child.
|
|
*
|
|
* @param aEvent is the mouse event to be forwarded.
|
|
*/
|
|
void skipMouseEvent( wxMouseEvent& aEvent );
|
|
|
|
/**
|
|
* @brief Prepares cursor bitmap.
|
|
*/
|
|
virtual void initCursor();
|
|
|
|
/**
|
|
* @brief Blits cursor into the current screen.
|
|
*/
|
|
virtual void blitCursor( wxMemoryDC& clientDC );
|
|
|
|
/// 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();
|
|
|
|
/// Drawing polygons & polylines is the same in cairo, so here is the common code
|
|
void drawPoly( const std::deque<VECTOR2D>& aPointList );
|
|
void drawPoly( const VECTOR2D aPointList[], int aListSize );
|
|
|
|
/**
|
|
* @brief Returns 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();
|
|
|
|
/// Format used to store pixels
|
|
static const cairo_format_t GAL_FORMAT = CAIRO_FORMAT_RGB24;
|
|
|
|
///> Opacity of a single layer
|
|
static const float LAYER_ALPHA;
|
|
};
|
|
} // namespace KIGFX
|
|
|
|
#endif // CAIROGAL_H_
|