AndrewShkrob/organicmaps
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Split path text spline if its middle points clipped.

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This commit is contained in:
Daria Volvenkova 2015-12-21 17:11:27 +03:00
parent 4f21c7442b
commit 4ffb68cf7f
1 changed files with 47 additions and 29 deletions
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76
drape_frontend/path_text_shape.cpp
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@ -55,50 +55,48 @@ public:
{
if (!df::TextHandle::Update(screen))
return false;
if (m_buffer.empty())
m_buffer.resize(4 * m_layout->GetGlyphCount());
m2::Spline pixelSpline(m_spline->GetSize());
vector<m2::PointD> const & globalPoints = m_spline->GetPath();
for (auto pos : globalPoints)
{
pos = screen.GtoP(pos);
if (screen.isPerspective())
{
if (!screen.PixelRect().IsPointInside(pos))
continue;
pos = screen.PtoP3d(pos);
}
pixelSpline.AddPoint(pos);
}
m2::Spline pixelSpline(m_spline->GetSize());
m2::Spline::iterator centerPointIter;
centerPointIter.Attach(pixelSpline);
if (screen.isPerspective())
{
if (pixelSpline.GetSize() < 2)
float pixelOffset = 0.0f;
uint32_t startIndex = 0;
for (auto pos : globalPoints)
{
pos = screen.GtoP(pos);
if (!screen.PixelRect().IsPointInside(pos))
{
if (CalculateOffsets(pixelSpline, startIndex, pixelOffset))
break;
pixelSpline = m2::Spline(m_spline->GetSize());
continue;
}
pixelSpline.AddPoint(screen.PtoP3d(pos));
}
if (pixelOffset == 0.0f && !CalculateOffsets(pixelSpline, startIndex, pixelOffset))
return false;
vector<float> offsets;
df::PathTextLayout::CalculatePositions(offsets, pixelSpline.GetLength(), 1.0,
m_layout->GetPixelLength());
if (offsets.size() <= m_textIndex)
return false;
centerPointIter.Advance(offsets[m_textIndex]);
centerPointIter.Attach(pixelSpline);
centerPointIter.Advance(pixelOffset);
m_globalPivot = screen.PtoG(screen.P3dtoP(centerPointIter.m_pos));
}
else
{
for (auto pos : globalPoints)
pixelSpline.AddPoint(screen.GtoP(pos));
centerPointIter.Attach(pixelSpline);
centerPointIter.Advance(m_globalOffset / screen.GetScale());
m_globalPivot = screen.PtoG(centerPointIter.m_pos);
}
if (m_buffer.empty())
m_buffer.resize(4 * m_layout->GetGlyphCount());
return m_layout->CacheDynamicGeometry(centerPointIter, m_depth, m_globalPivot, m_buffer);
}
@ -181,6 +179,26 @@ public:
return m_priorityFollowingMode;
}
private:
bool CalculateOffsets(const m2::Spline & pixelSpline, uint32_t & startIndex, float & pixelOffset) const
{
if (pixelSpline.GetSize() < 2)
return false;
vector<float> offsets;
df::PathTextLayout::CalculatePositions(offsets, pixelSpline.GetLength(), 1.0,
m_layout->GetPixelLength());
if (startIndex + offsets.size() <= m_textIndex)
{
startIndex += offsets.size();
return false;
}
pixelOffset = offsets[m_textIndex - startIndex];
return true;
}
private:
m2::SharedSpline m_spline;
df::SharedTextLayout m_layout;