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Use optimized function to draw horizontal/vertical lines only with wxCOPY raster operation mode

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Optimized function to draw H/V lines is based on ExtTextOut() API and therefore raster operations modes other than wxCOPY are not applicable.

Closes #18635.
This commit is contained in:
Artur Wieczorek
2019-12-19 22:32:11 +01:00
parent 00d113c341
commit 9689bd124e
1 changed files with 5 additions and 1 deletions
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6
src/msw/dc.cpp
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@@ -831,7 +831,9 @@ void wxMSWDCImpl::DoCrossHair(wxCoord x, wxCoord y)
// outside the view and visible line ends are always square.
// - DC which coordinate system is not rotated (graphics mode
// of the DC != GM_ADVANCED) and not scaled.
// - wxCOPY raster operation mode becaue it is based on ExtTextOut() API.
if ( IsNonTransformedDC(GetHdc()) &&
m_logicalFunction == wxCOPY &&
m_pen.IsNonTransparent() && // this calls IsOk() too
m_pen.GetStyle() == wxPENSTYLE_SOLID
)
@@ -859,13 +861,15 @@ void wxMSWDCImpl::DoCrossHair(wxCoord x, wxCoord y)
void wxMSWDCImpl::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
{
// We have optimized function to draw physical vertical or horizontal lines
// with solid color and square ends.
// with solid color and square ends. It is based on ExtTextOut() API
// so it can be used only with wxCOPY raster operation mode.
// Because checking wheteher the line would be horizontal/vertical
// in the device coordinate system is complex so we only check whether
// the line is horizontal/vertical in the logical coordinates and use
// optimized function only for DC which coordinate system is for sure
// not rotated (graphics mode of the DC != GM_ADVANCED) and not scaled.
if ( (x1 == x2 || y1 == y2) &&
m_logicalFunction == wxCOPY &&
IsNonTransformedDC(GetHdc()) &&
m_pen.IsNonTransparent() && // this calls IsOk() too
m_pen.GetStyle() == wxPENSTYLE_SOLID &&