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Code Issues Activity Actions

Tidy up the h/v line drawing loops a bit.

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This commit is contained in:
Andreas Kling 2019-01-12 16:39:56 +01:00
parent b4bd4f4b29
commit 8d78b0a8df
1 changed files with 6 additions and 2 deletions
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8
Widgets/Painter.cpp
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@ -144,7 +144,9 @@ void Painter::drawLine(const Point& p1, const Point& p2, Color color)
return;
if (point1.y() > point2.y())
swap(point1, point2);
for (int y = max(point1.y(), m_clipRect.top()); y <= min(point2.y(), m_clipRect.bottom()); ++y)
int min_y = max(point1.y(), m_clipRect.top());
int max_y = min(point2.y(), m_clipRect.bottom());
for (int y = min_y; y <= max_y; ++y)
set_pixel_with_draw_op(m_target->scanline(y)[x], color);
return;
}
@ -159,8 +161,10 @@ void Painter::drawLine(const Point& p1, const Point& p2, Color color)
return;
if (point1.x() > point2.x())
swap(point1, point2);
int min_x = max(point1.x(), m_clipRect.left());
int max_x = min(point2.x(), m_clipRect.right());
auto* pixels = m_target->scanline(point1.y());
for (int x = max(point1.x(), m_clipRect.left()); x <= min(point2.x(), m_clipRect.right()); ++x)
for (int x = min_x; x <= max_x; ++x)
set_pixel_with_draw_op(pixels[x], color);
return;
}