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Responsive: OPENGL_GAL::DrawArc reserve linequads to reduce drawing time 

(cherry picked from commit 77576e1a80)
This commit is contained in:
Yon Uriarte 2024-03-04 09:18:25 +01:00 committed by Wayne Stambaugh
parent 8b281b4d1c
commit 4e8d6de1de
1 changed files with 11 additions and 2 deletions
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13
common/gal/opengl/opengl_gal.cpp
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@ -1005,11 +1005,20 @@ void OPENGL_GAL::DrawArc( const VECTOR2D& aCenterPoint, double aRadius,
VECTOR2D p( cos( startAngle ) * aRadius, sin( startAngle ) * aRadius );
double alpha;
unsigned int lineCount = 0;
for( alpha = startAngle + alphaIncrement; alpha <= endAngle; alpha += alphaIncrement )
lineCount++;
if( alpha != endAngle )
lineCount++;
reserveLineQuads( lineCount );
for( alpha = startAngle + alphaIncrement; alpha <= endAngle; alpha += alphaIncrement )
{
VECTOR2D p_next( cos( alpha ) * aRadius, sin( alpha ) * aRadius );
DrawLine( p, p_next );
drawLineQuad( p, p_next, false );
p = p_next;
}
@ -1018,7 +1027,7 @@ void OPENGL_GAL::DrawArc( const VECTOR2D& aCenterPoint, double aRadius,
if( alpha != endAngle )
{
VECTOR2D p_last( cos( endAngle ) * aRadius, sin( endAngle ) * aRadius );
DrawLine( p, p_last );
drawLineQuad( p, p_last, false );
}
}