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Don't allocate all of memory when the coord system turns inside out. 

Fixes https://gitlab.com/kicad/code/kicad/issues/14088

(cherry picked from commit fe9370ceea)
This commit is contained in:
Jeff Young 2023-02-26 21:50:43 +00:00
parent 955bd5a6d1
commit 5979b8e385
1 changed files with 177 additions and 170 deletions
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347
common/widgets/mathplot.cpp
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@ -566,207 +566,214 @@ void mpFXY::Plot( wxDC& dc, mpWindow& w )
wxCHECK_RET( m_scaleY, wxS( "Y scale was not set" ) );
if( m_visible )
if( !m_visible )
return;
wxCoord startPx = m_drawOutsideMargins ? 0 : w.GetMarginLeft();
wxCoord endPx = m_drawOutsideMargins ? w.GetScrX() : w.GetScrX() - w.GetMarginRight();
wxCoord minYpx = m_drawOutsideMargins ? 0 : w.GetMarginTop();
wxCoord maxYpx = m_drawOutsideMargins ? w.GetScrY() : w.GetScrY() - w.GetMarginBottom();
// Check for a collapsed window before we try to allocate a negative number of points
if( endPx <= startPx || minYpx >= maxYpx )
return;
dc.SetPen( m_pen );
double x, y;
// Do this to reset the counters to evaluate bounding box for label positioning
Rewind();
GetNextXY( x, y );
maxDrawX = x;
minDrawX = x;
maxDrawY = y;
minDrawY = y;
// drawnPoints = 0;
Rewind();
dc.SetClippingRegion( startPx, minYpx, endPx - startPx + 1, maxYpx - minYpx + 1 );
if( !m_continuous )
{
dc.SetPen( m_pen );
bool first = true;
wxCoord ix = 0;
std::set<wxCoord> ys;
double x, y;
// Do this to reset the counters to evaluate bounding box for label positioning
Rewind(); GetNextXY( x, y );
maxDrawX = x; minDrawX = x; maxDrawY = y; minDrawY = y;
// drawnPoints = 0;
Rewind();
wxCoord startPx = m_drawOutsideMargins ? 0 : w.GetMarginLeft();
wxCoord endPx = m_drawOutsideMargins ? w.GetScrX() : w.GetScrX() - w.GetMarginRight();
wxCoord minYpx = m_drawOutsideMargins ? 0 : w.GetMarginTop();
wxCoord maxYpx = m_drawOutsideMargins ? w.GetScrY() : w.GetScrY() - w.GetMarginBottom();
dc.SetClippingRegion( startPx, minYpx, endPx - startPx + 1, maxYpx - minYpx + 1 );
if( !m_continuous )
while( GetNextXY( x, y ) )
{
bool first = true;
wxCoord ix = 0;
std::set<wxCoord> ys;
double px = m_scaleX->TransformToPlot( x );
double py = m_scaleY->TransformToPlot( y );
wxCoord newX = w.x2p( px );
while( GetNextXY( x, y ) )
if( first )
{
double px = m_scaleX->TransformToPlot( x );
double py = m_scaleY->TransformToPlot( y );
wxCoord newX = w.x2p( px );
if( first )
{
ix = newX;
first = false;
}
if( newX == ix ) // continue until a new X coordinate is reached
{
// collect all unique points
ys.insert( w.y2p( py ) );
continue;
}
for( auto& iy: ys )
{
if( m_drawOutsideMargins
|| ( (ix >= startPx) && (ix <= endPx) && (iy >= minYpx)
&& (iy <= maxYpx) ) )
{
// for some reason DrawPoint does not use the current pen,
// so we use DrawLine for fat pens
if( m_pen.GetWidth() <= 1 )
{
dc.DrawPoint( ix, iy );
}
else
{
dc.DrawLine( ix, iy, ix, iy );
}
UpdateViewBoundary( ix, iy );
}
}
ys.clear();
ix = newX;
first = false;
}
if( newX == ix ) // continue until a new X coordinate is reached
{
// collect all unique points
ys.insert( w.y2p( py ) );
continue;
}
}
else
{
int count = 0;
int x0=0; // X position of merged current vertical line
int ymin0=0; // y min coord of merged current vertical line
int ymax0=0; // y max coord of merged current vertical line
int dupx0 = 0; // count of currently merged vertical lines
wxPoint line_start; // starting point of the current line to draw
// A buffer to store coordinates of lines to draw
std::vector<wxPoint>pointList;
pointList.reserve( endPx - startPx + 1 );
// Note: we can use dc.DrawLines() only for a reasonable number or points (<10000),
// because at least on Windows dc.DrawLines() can hang for a lot of points.
// (> 10000 points) (can happens when a lot of points is calculated)
// To avoid long draw time (and perhaps hanging) one plot only not redundant lines.
// To avoid artifacts when skipping points to the same x coordinate, for each
// group of points at a give, x coordinate we also draw a vertical line at this coord,
// from the ymin to the ymax vertical coordinates of skipped points
while( GetNextXY( x, y ) )
for( auto& iy: ys )
{
double px = m_scaleX->TransformToPlot( x );
double py = m_scaleY->TransformToPlot( y );
wxCoord x1 = w.x2p( px );
wxCoord y1 = w.y2p( py );
// Store only points on the drawing area, to speed up the drawing time
// Note: x1 is a value truncated from px by w.x2p(). So to be sure the
// first point is drawn, the x1 low limit is startPx-1 in plot coordinates
if( x1 >= startPx-1 && x1 <= endPx )
if( m_drawOutsideMargins
|| ( (ix >= startPx) && (ix <= endPx) && (iy >= minYpx) && (iy <= maxYpx) ) )
{
if( !count || line_start.x != x1 )
{
if( count && dupx0 > 1 && ymin0 != ymax0 )
{
// Vertical points are merged, draw the pending vertical line
// However, if the line is one pixel length, it is not drawn,
// because the main trace show this point
dc.DrawLine( x0, ymin0, x0, ymax0 );
}
x0 = x1;
ymin0 = ymax0 = y1;
dupx0 = 0;
pointList.emplace_back( wxPoint( x1, y1 ) );
line_start.x = x1;
line_start.y = y1;
count++;
}
// for some reason DrawPoint does not use the current pen, so we use
// DrawLine for fat pens
if( m_pen.GetWidth() <= 1 )
dc.DrawPoint( ix, iy );
else
{
ymin0 = std::min( ymin0, y1 );
ymax0 = std::max( ymax0, y1 );
x0 = x1;
dupx0++;
}
dc.DrawLine( ix, iy, ix, iy );
UpdateViewBoundary( ix, iy );
}
}
if( pointList.size() > 1 )
{
// For a better look (when using dashed lines) and more optimization,
// try to merge horizontal segments, in order to plot longer lines
// we are merging horizontal segments because this is easy,
// and horizontal segments are a frequent cases
std::vector<wxPoint> drawPoints;
drawPoints.reserve( endPx - startPx + 1 );
drawPoints.push_back( pointList[0] ); // push the first point in list
for( size_t ii = 1; ii < pointList.size()-1; ii++ )
{
// Skip intermediate points between the first point and the last
// point of the segment candidate
if( drawPoints.back().y == pointList[ii].y &&
drawPoints.back().y == pointList[ii+1].y )
continue;
else
drawPoints.push_back( pointList[ii] );
}
// push the last point to draw in list
if( drawPoints.back() != pointList.back() )
drawPoints.push_back( pointList.back() );
dc.DrawLines( drawPoints.size(), &drawPoints[0] );
}
ys.clear();
ix = newX;
ys.insert( w.y2p( py ) );
}
}
else
{
int count = 0;
int x0=0; // X position of merged current vertical line
int ymin0=0; // y min coord of merged current vertical line
int ymax0=0; // y max coord of merged current vertical line
int dupx0 = 0; // count of currently merged vertical lines
wxPoint line_start; // starting point of the current line to draw
if( !m_name.IsEmpty() && m_showName )
// A buffer to store coordinates of lines to draw
std::vector<wxPoint>pointList;
pointList.reserve( endPx - startPx + 1 );
// Note: we can use dc.DrawLines() only for a reasonable number or points (<10000),
// because at least on Windows dc.DrawLines() can hang for a lot of points.
// (> 10000 points) (can happens when a lot of points is calculated)
// To avoid long draw time (and perhaps hanging) one plot only not redundant lines.
// To avoid artifacts when skipping points to the same x coordinate, for each group of
// points at a give, x coordinate we also draw a vertical line at this coord, from the
// ymin to the ymax vertical coordinates of skipped points
while( GetNextXY( x, y ) )
{
dc.SetFont( m_font );
double px = m_scaleX->TransformToPlot( x );
double py = m_scaleY->TransformToPlot( y );
wxCoord tx, ty;
dc.GetTextExtent( m_name, &tx, &ty );
wxCoord x1 = w.x2p( px );
wxCoord y1 = w.y2p( py );
// xxx implement else ... if (!HasBBox())
// Store only points on the drawing area, to speed up the drawing time
// Note: x1 is a value truncated from px by w.x2p(). So to be sure the first point
// is drawn, the x1 low limit is startPx-1 in plot coordinates
if( x1 >= startPx-1 && x1 <= endPx )
{
// const int sx = w.GetScrX();
// const int sy = w.GetScrY();
if( !count || line_start.x != x1 )
{
if( count && dupx0 > 1 && ymin0 != ymax0 )
{
// Vertical points are merged, draw the pending vertical line
// However, if the line is one pixel length, it is not drawn, because
// the main trace show this point
dc.DrawLine( x0, ymin0, x0, ymax0 );
}
if( (m_flags & mpALIGNMASK) == mpALIGN_NW )
{
tx = minDrawX + 8;
ty = maxDrawY + 8;
}
else if( (m_flags & mpALIGNMASK) == mpALIGN_NE )
{
tx = maxDrawX - tx - 8;
ty = maxDrawY + 8;
}
else if( (m_flags & mpALIGNMASK) == mpALIGN_SE )
{
tx = maxDrawX - tx - 8;
ty = minDrawY - ty - 8;
x0 = x1;
ymin0 = ymax0 = y1;
dupx0 = 0;
pointList.emplace_back( wxPoint( x1, y1 ) );
line_start.x = x1;
line_start.y = y1;
count++;
}
else
{
// mpALIGN_SW
tx = minDrawX + 8;
ty = minDrawY - ty - 8;
ymin0 = std::min( ymin0, y1 );
ymax0 = std::max( ymax0, y1 );
x0 = x1;
dupx0++;
}
}
}
if( pointList.size() > 1 )
{
// For a better look (when using dashed lines) and more optimization, try to merge
// horizontal segments, in order to plot longer lines
// We are merging horizontal segments because this is easy, and horizontal segments
// are a frequent cases
std::vector<wxPoint> drawPoints;
drawPoints.reserve( endPx - startPx + 1 );
drawPoints.push_back( pointList[0] ); // push the first point in list
for( size_t ii = 1; ii < pointList.size()-1; ii++ )
{
// Skip intermediate points between the first point and the last point of the
// segment candidate
if( drawPoints.back().y == pointList[ii].y &&
drawPoints.back().y == pointList[ii+1].y )
{
continue;
}
else
{
drawPoints.push_back( pointList[ii] );
}
}
dc.DrawText( m_name, tx, ty );
// push the last point to draw in list
if( drawPoints.back() != pointList.back() )
drawPoints.push_back( pointList.back() );
dc.DrawLines( drawPoints.size(), &drawPoints[0] );
}
}
if( !m_name.IsEmpty() && m_showName )
{
dc.SetFont( m_font );
wxCoord tx, ty;
dc.GetTextExtent( m_name, &tx, &ty );
// xxx implement else ... if (!HasBBox())
{
// const int sx = w.GetScrX();
// const int sy = w.GetScrY();
if( (m_flags & mpALIGNMASK) == mpALIGN_NW )
{
tx = minDrawX + 8;
ty = maxDrawY + 8;
}
else if( (m_flags & mpALIGNMASK) == mpALIGN_NE )
{
tx = maxDrawX - tx - 8;
ty = maxDrawY + 8;
}
else if( (m_flags & mpALIGNMASK) == mpALIGN_SE )
{
tx = maxDrawX - tx - 8;
ty = minDrawY - ty - 8;
}
else
{
// mpALIGN_SW
tx = minDrawX + 8;
ty = minDrawY - ty - 8;
}
}
dc.DrawText( m_name, tx, ty );
}
dc.DestroyClippingRegion();
}