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Gerbview: Polygon shape: store its drawing coordinates to avoid rebuild them. 

Previously, draw coordinates (and especially cache triangulation) were rebuild
each time the polygon was redraw. They are now cached. This is a significant
speed up, especially when a polygon is highlighted.
This commit is contained in:
jean-pierre charras 2021-08-18 10:01:29 +02:00
parent 905a8366c5
commit a9aae9b3f7
2 changed files with 16 additions and 13 deletions
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2
gerbview/gerber_draw_item.h
View File

@ -278,6 +278,8 @@ public:
* redundancy for these parameters
*/
// This polygon is to draw this item (mainly GBR_POLYGON), according to layer parameters
SHAPE_POLY_SET m_AbsolutePolygon; // the polygon to draw, in absolute coordinates
private:
// These values are used to draw this item, according to gerber layers parameters
// Because they can change inside a gerber image, they are stored here

27
gerbview/gerbview_painter.cpp
View File

@ -281,30 +281,31 @@ void GERBVIEW_PAINTER::draw( /*const*/ GERBER_DRAW_ITEM* aItem, int aLayer )
if( !isFilled )
m_gal->SetLineWidth( m_gerbviewSettings.m_outlineWidth );
std::vector<VECTOR2I> pts = aItem->m_Polygon.COutline( 0 ).CPoints();
if( aItem->m_AbsolutePolygon.OutlineCount() == 0 )
{
std::vector<VECTOR2I> pts = aItem->m_Polygon.COutline( 0 ).CPoints();
for( auto& pt : pts )
pt = aItem->GetABPosition( pt );
for( auto& pt : pts )
pt = aItem->GetABPosition( pt );
SHAPE_POLY_SET absolutePolygon;
SHAPE_LINE_CHAIN chain( pts );
chain.SetClosed( true );
absolutePolygon.AddOutline( chain );
SHAPE_LINE_CHAIN chain( pts );
chain.SetClosed( true );
aItem->m_AbsolutePolygon.AddOutline( chain );
}
// Degenerated polygons (having < 3 points) are drawn as lines
// to avoid issues in draw polygon functions
if( !isFilled || absolutePolygon.COutline( 0 ).PointCount() < 3 )
m_gal->DrawPolyline( absolutePolygon.COutline( 0 ) );
if( !isFilled || aItem->m_AbsolutePolygon.COutline( 0 ).PointCount() < 3 )
m_gal->DrawPolyline( aItem->m_AbsolutePolygon.COutline( 0 ) );
else
{
// On Opengl, a not convex filled polygon is usually drawn by using triangles as primitives.
// CacheTriangulation() can create basic triangle primitives to draw the polygon solid shape
// on Opengl
if( m_gal->IsOpenGlEngine() )
absolutePolygon.CacheTriangulation();
if( m_gal->IsOpenGlEngine() && !aItem->m_AbsolutePolygon.IsTriangulationUpToDate() )
aItem->m_AbsolutePolygon.CacheTriangulation();
m_gal->DrawPolygon( absolutePolygon );
m_gal->DrawPolygon( aItem->m_AbsolutePolygon );
}
break;