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FIX: add parameter to GAL::DrawCurve to control the curve to polyline 

conversion.
Cairo supports curves, but not Opengl, that needs a conversion to polyline.
This control allows optimization in conversion
This commit is contained in:
jean-pierre charras 2019-11-09 11:37:49 +01:00
parent 1903052d79
commit 37b6552c42
7 changed files with 20 additions and 8 deletions
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2
common/bezier_curves.cpp
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@ -59,7 +59,7 @@ void BEZIER_POLY::GetPoly( std::vector<VECTOR2D>& aOutput, double aMinSegLen )
aOutput.clear();
aOutput.push_back( m_ctrlPts[0] );
// If the Bezier curve is degenerated (straight line), skip that:
// If the Bezier curve is degenerated (straight line), skip intermediate points:
bool degenerated = m_ctrlPts[0] == m_ctrlPts[1] && m_ctrlPts[2] == m_ctrlPts[3];
if( !degenerated )

5
common/gal/cairo/cairo_gal.cpp
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@ -424,8 +424,11 @@ void CAIRO_GAL_BASE::DrawPolygon( const SHAPE_LINE_CHAIN& aPolygon )
void CAIRO_GAL_BASE::DrawCurve( const VECTOR2D& aStartPoint, const VECTOR2D& aControlPointA,
const VECTOR2D& aControlPointB, const VECTOR2D& aEndPoint )
const VECTOR2D& aControlPointB, const VECTOR2D& aEndPoint,
double aFilterValue )
{
// Note: aFilterValue is not used because the cubic Bezier curve is
// supported by Cairo.
syncLineWidth();
const auto sp = roundp( xform( aStartPoint ) );

5
common/gal/opengl/opengl_gal.cpp
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@ -1035,7 +1035,8 @@ void OPENGL_GAL::DrawPolygon( const SHAPE_LINE_CHAIN& aPolygon )
void OPENGL_GAL::DrawCurve( const VECTOR2D& aStartPoint, const VECTOR2D& aControlPointA,
const VECTOR2D& aControlPointB, const VECTOR2D& aEndPoint )
const VECTOR2D& aControlPointB, const VECTOR2D& aEndPoint,
double aFilterValue )
{
std::vector<VECTOR2D> output;
std::vector<VECTOR2D> pointCtrl;
@ -1046,7 +1047,7 @@ void OPENGL_GAL::DrawCurve( const VECTOR2D& aStartPoint, const VECTOR2D& aContro
pointCtrl.push_back( aEndPoint );
BEZIER_POLY converter( pointCtrl );
converter.GetPoly( output, GetLineWidth() );
converter.GetPoly( output, aFilterValue );
DrawPolyline( &output[0], output.size() );
}

3
include/gal/cairo/cairo_gal.h
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@ -101,7 +101,8 @@ public:
/// @copydoc GAL::DrawCurve()
virtual void DrawCurve( const VECTOR2D& startPoint, const VECTOR2D& controlPointA,
const VECTOR2D& controlPointB, const VECTOR2D& endPoint ) override;
const VECTOR2D& controlPointB, const VECTOR2D& endPoint,
double aFilterValue = 0.0 ) override;
/// @copydoc GAL::DrawBitmap()
virtual void DrawBitmap( const BITMAP_BASE& aBitmap ) override;

6
include/gal/graphics_abstraction_layer.h
View File

@ -179,9 +179,13 @@ public:
* @param controlPointA is the first control point.
* @param controlPointB is the second control point.
* @param endPoint is the end point of the spline.
* @param aFilterValue is used by Bezier to segments approximation, if
* the Bezier curve is not supported and needs a curve to polyline conversion.
* aFilterValue = 0 means no filtering.
*/
virtual void DrawCurve( const VECTOR2D& startPoint, const VECTOR2D& controlPointA,
const VECTOR2D& controlPointB, const VECTOR2D& endPoint ) {};
const VECTOR2D& controlPointB, const VECTOR2D& endPoint,
double aFilterValue = 0.0 ) {};
/**
* @brief Draw a bitmap image.

3
include/gal/opengl/opengl_gal.h
View File

@ -139,7 +139,8 @@ public:
/// @copydoc GAL::DrawCurve()
virtual void DrawCurve( const VECTOR2D& startPoint, const VECTOR2D& controlPointA,
const VECTOR2D& controlPointB, const VECTOR2D& endPoint ) override;
const VECTOR2D& controlPointB, const VECTOR2D& endPoint,
double aFilterValue = 0.0 ) override;
/// @copydoc GAL::DrawBitmap()
virtual void DrawBitmap( const BITMAP_BASE& aBitmap ) override;

4
pcbnew/pcb_painter.cpp
View File

@ -1016,10 +1016,12 @@ void PCB_PAINTER::draw( const DRAWSEGMENT* aSegment, int aLayer )
m_gal->SetIsFill( false );
m_gal->SetIsStroke( true );
m_gal->SetLineWidth( thickness );
// Use thickness as filter value to convert the curve to polyline
// when the curve is not supported
m_gal->DrawCurve( VECTOR2D( aSegment->GetStart() ),
VECTOR2D( aSegment->GetBezControl1() ),
VECTOR2D( aSegment->GetBezControl2() ),
VECTOR2D( aSegment->GetEnd() ) );
VECTOR2D( aSegment->GetEnd() ), thickness );
break;
case S_LAST: