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C++: make the PhysicalRegion::rectangles non-overlapping

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This commit is contained in:
Olivier Goffart 2024-07-09 14:25:38 +02:00
parent 256ff1a5f5
commit 42d7661ec6
4 changed files with 39 additions and 14 deletions
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30
api/cpp/include/slint-platform.h
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@ -590,6 +590,7 @@ public:
}
/// Returns a view on all the rectangles in this region.
/// The rectangles do not overlap.
/// The returned type is a C++ view over PhysicalRegion::Rect structs.
///
/// It can be used like so:
@ -600,14 +601,27 @@ public:
/// ```
auto rectangles() const
{
return std::views::counted(inner.rectangles, inner.count)
| std::views::transform([](const auto &box) {
return Rect {
.origin = PhysicalPosition({ .x = box.min.x, .y = box.min.y }),
.size = PhysicalSize({ .width = uint32_t(box.max.x - box.min.x),
.height = uint32_t(box.max.y - box.min.y) })
};
});
SharedVector<cbindgen_private::IntRect> rectangles;
slint_software_renderer_region_to_rects(&inner, &rectangles);
# if __cpp_lib_ranges >= 202110L // DR20 P2415R2
using std::ranges::owning_view;
# else
struct owning_view : std::ranges::view_interface<owning_view>
{
SharedVector<cbindgen_private::IntRect> rectangles;
owning_view(SharedVector<cbindgen_private::IntRect> &&rectangles)
: rectangles(rectangles)
{
}
auto begin() const { return rectangles.begin(); }
auto end() const { return rectangles.end(); }
};
# endif
return owning_view(std::move(rectangles)) | std::views::transform([](const auto &r) {
return Rect { .origin = PhysicalPosition({ .x = r.x, .y = r.y }),
.size = PhysicalSize({ .width = uint32_t(r.width),
.height = uint32_t(r.height) }) };
});
}
/// A Rectangle defined with an origin and a size.