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SharedGraphics: Add missing clipping in draw_line().

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This commit is contained in:
Andreas Kling 2019-02-03 03:37:55 +01:00
parent dd931f136e
commit 3198639730
1 changed files with 8 additions and 0 deletions
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8
SharedGraphics/Painter.cpp
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@ -270,6 +270,10 @@ void Painter::draw_line(const Point& p1, const Point& p2, Color color)
return; return;
if (point1.y() > point2.y()) if (point1.y() > point2.y())
swap(point1, point2); swap(point1, point2);
if (point1.y() > m_clip_rect.bottom())
return;
if (point2.y() < m_clip_rect.top())
return;
int min_y = max(point1.y(), m_clip_rect.top()); int min_y = max(point1.y(), m_clip_rect.top());
int max_y = min(point2.y(), m_clip_rect.bottom()); int max_y = min(point2.y(), m_clip_rect.bottom());
for (int y = min_y; y <= max_y; ++y) for (int y = min_y; y <= max_y; ++y)
@ -287,6 +291,10 @@ void Painter::draw_line(const Point& p1, const Point& p2, Color color)
return; return;
if (point1.x() > point2.x()) if (point1.x() > point2.x())
swap(point1, point2); swap(point1, point2);
if (point1.x() > m_clip_rect.right())
return;
if (point2.x() < m_clip_rect.left())
return;
int min_x = max(point1.x(), m_clip_rect.left()); int min_x = max(point1.x(), m_clip_rect.left());
int max_x = min(point2.x(), m_clip_rect.right()); int max_x = min(point2.x(), m_clip_rect.right());
auto* pixels = m_target->scanline(point1.y()); auto* pixels = m_target->scanline(point1.y());