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LibGfx: Add support for dashed lines

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Non-configurable for now.
This commit is contained in:
Linus Groh 2020-05-10 16:17:26 +01:00 • committed by Andreas Kling
parent 3667677008
commit 0669dbcf5d
3 changed files with 32 additions and 11 deletions
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14
Libraries/LibGfx/Painter.cpp
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@ -992,6 +992,12 @@ void Painter::draw_line(const Point& p1, const Point& p2, Color color, int thick
if (style == LineStyle::Dotted) {
for (int y = min_y; y <= max_y; y += thickness * 2)
draw_pixel({ x, y }, color, thickness);
} else if (style == LineStyle::Dashed) {
for (int y = min_y; y <= max_y; y += thickness * 6) {
draw_pixel({ x, y }, color, thickness);
draw_pixel({ x, min(y + thickness, max_y) }, color, thickness);
draw_pixel({ x, min(y + thickness * 2, max_y) }, color, thickness);
}
} else {
for (int y = min_y; y <= max_y; ++y)
draw_pixel({ x, y }, color, thickness);
@ -1015,6 +1021,12 @@ void Painter::draw_line(const Point& p1, const Point& p2, Color color, int thick
if (style == LineStyle::Dotted) {
for (int x = min_x; x <= max_x; x += thickness * 2)
draw_pixel({ x, y }, color, thickness);
} else if (style == LineStyle::Dashed) {
for (int x = min_x; x <= max_x; x += thickness * 6) {
draw_pixel({ x, y }, color, thickness);
draw_pixel({ min(x + thickness, max_x), y }, color, thickness);
draw_pixel({ min(x + thickness * 2, max_x), y }, color, thickness);
}
} else {
for (int x = min_x; x <= max_x; ++x)
draw_pixel({ x, y }, color, thickness);
@ -1022,7 +1034,7 @@ void Painter::draw_line(const Point& p1, const Point& p2, Color color, int thick
return;
}
// FIXME: Implement dotted diagonal lines.
// FIXME: Implement dotted/dashed diagonal lines.
ASSERT(style == LineStyle::Solid);
const double adx = abs(point2.x() - point1.x());