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LibGfx: Implement checkerboard drawing for Gfx::Painter

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This commit is contained in:
Tibor Nagy 2020-04-05 13:01:13 +02:00 • committed by Andreas Kling
parent de32fd0347
commit e14d27867c
2 changed files with 20 additions and 0 deletions
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19
Libraries/LibGfx/Painter.cpp
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@ -142,6 +142,25 @@ void Painter::fill_rect(const Rect& a_rect, Color color)
}
}
void Painter::fill_rect_with_checkerboard(const Rect& a_rect, const Size& cell_size, Color color_dark, Color color_light)
{
auto rect = a_rect.translated(translation()).intersected(clip_rect());
if (rect.is_empty())
return;
RGBA32* dst = m_target->scanline(rect.top()) + rect.left();
const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
for (int i = 0; i < rect.height(); ++i) {
for (int j = 0; j < rect.width(); ++j) {
int cell_row = i / cell_size.height();
int cell_col = j / cell_size.width();
dst[j] = ((cell_row % 2) ^ (cell_col % 2)) ? color_light.value() : color_dark.value();
}
dst += dst_skip;
}
}
void Painter::fill_rect_with_gradient(Orientation orientation, const Rect& a_rect, Color gradient_start, Color gradient_end)
{
#ifdef NO_FPU

1
Libraries/LibGfx/Painter.h
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@ -45,6 +45,7 @@ public:
~Painter();
void clear_rect(const Rect&, Color);
void fill_rect(const Rect&, Color);
void fill_rect_with_checkerboard(const Rect&, const Size&, Color color_dark, Color color_light);
void fill_rect_with_gradient(Orientation, const Rect&, Color gradient_start, Color gradient_end);
void fill_rect_with_gradient(const Rect&, Color gradient_start, Color gradient_end);
void draw_rect(const Rect&, Color, bool rough = false);