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#include "wall-atlas.hpp"
#include "tile-constants.hpp"
#include "compat/exception.hpp"
#include <utility>
#include <Corrade/Containers/StridedArrayView.h>
#include <Magnum/ImageView.h>
#include <Magnum/GL/TextureFormat.h>
namespace floormat::Wall {
uint8_t direction_index_from_name(StringView s) noexcept(false)
{
for (uint8_t i = 0; auto [n, _] : wall_atlas::directions)
if (n == s)
return i;
else
i++;
fm_throw("bad rotation name '{}'"_cf, s);
}
StringView direction_index_to_name(size_t i) noexcept(false)
{
fm_soft_assert(i < arraySize(wall_atlas::directions));
return wall_atlas::directions[i].name;
}
void resolve_wall_rotations(Array<Wall::Direction>& array, const std::array<DirArrayIndex, Direction_COUNT>& map) noexcept(false)
{
for (auto [dir_name, dir] : wall_atlas::directions)
{
auto DAI = map[(size_t)dir];
if (!DAI)
continue;
auto& D = array[DAI.val];
for (auto [group_name, ptr, gr] : Direction::groups)
{
auto& G = D.*ptr;
if (!G.is_defined)
continue;
if (G.from_rotation != (uint8_t)-1)
{
const auto& DAI2 = map[G.from_rotation];
if (!DAI2)
fm_throw("from_rotation for '{}/{}' points to nonexistent rotation {}"_cf,
dir_name, group_name, direction_index_to_name(G.from_rotation));
const auto& D2 = array[DAI2.val];
const auto& G2 = D2.*ptr;
if (!G2.is_defined || G2.from_rotation != (uint8_t)-1)
fm_throw("from_rotation for '{}/{}' points to empty group '{}/{}'"_cf,
dir_name, group_name, direction_index_to_name(G.from_rotation), group_name);
G.from_rotation = DAI2.val;
}
}
}
}
} // namespace floormat::Wall
namespace floormat {
using namespace floormat::Wall;
namespace {
Vector2ui get_image_size(const ImageView2D& img)
{
const Size<3> size = img.pixels().size();
const auto width = size[1], height = size[0];
fm_soft_assert(size[2] >= 3 && size[2] <= 4);
fm_soft_assert(width > 0 && height > 0);
return { (unsigned)width, (unsigned)height };
}
} // namespace
wall_atlas::wall_atlas() noexcept = default;
wall_atlas::~wall_atlas() noexcept = default;
Vector2ui wall_atlas::expected_size(unsigned depth, Group_ group)
{
constexpr auto size = Vector3ui{iTILE_SIZE};
static_assert(size.x() == size.y());
fm_assert(depth > 0 && depth < 1<<15);
CORRADE_ASSUME(group < Group_::COUNT);
switch (group)
{
using enum Group_;
case wall:
return { size.x(), size.z() };
case top:
return { depth, size.x() };
case side:
case corner:
return { depth, size.z() };
case COUNT:
break;
}
fm_assert(false);
}
wall_atlas::wall_atlas(wall_atlas_def def, String path, const ImageView2D& img)
: _dir_array{move(def.direction_array)},
_frame_array{move(def.frames)},
_info{move(def.header)}, _path{move(path)},
_image_size{get_image_size(img)},
_direction_map{def.direction_map}
{
//Debug{} << "make wall_atlas" << _info.name;
{
const auto frame_count = _frame_array.size();
fm_soft_assert(frame_count > 0);
bool found = false;
for (auto [dir_name, dir] : wall_atlas::directions)
{
const auto* D = direction((size_t)dir);
fm_soft_assert(!!D == def.direction_mask[(size_t)dir]);
if (!D)
continue;
for (auto [group_name, gmemb, gr] : Direction::groups)
{
const auto& G = D->*gmemb;
fm_soft_assert(G.is_defined == !!G.count);
fm_soft_assert(G.is_defined == (G.index != (uint32_t)-1));
fm_soft_assert(G.from_rotation == (uint8_t)-1 || G.is_defined);
if (!G.is_defined)
continue;
found = true;
fm_soft_assert(G.index < frame_count && G.index + G.count <= frame_count);
const auto size = expected_size(_info.depth, gr);
for (const auto& frame : ArrayView { &_frame_array[G.index], G.count })
{
fm_soft_assert(frame.size == size);
fm_soft_assert(frame.offset + frame.size <= _image_size);
}
}
}
if (!found) [[unlikely]]
fm_throw("wall_atlas '{}' is empty!"_cf, _path);
}
resolve_wall_rotations(_dir_array, _direction_map);
_texture.setLabel(_path)
.setWrapping(GL::SamplerWrapping::ClampToEdge)
.setMagnificationFilter(GL::SamplerFilter::Nearest)
.setMinificationFilter(GL::SamplerFilter::Linear)
.setMaxAnisotropy(1) // todo?
.setBorderColor(Color4{1, 0, 0, 1})
.setStorage(1, GL::textureFormat(img.format()), img.size())
.setSubImage(0, {}, img);
}
auto wall_atlas::get_Direction(Direction_ num) const -> Direction*
{
fm_debug_assert(num < Direction_::COUNT);
if (auto DAI = _direction_map[(uint8_t)num])
return const_cast<Direction*>(&_dir_array[DAI.val]);
else [[unlikely]]
return {};
}
auto wall_atlas::frames(const Group& group) const -> ArrayView<const Frame>
{
if (_frame_array.isEmpty()) [[unlikely]]
return {};
const auto size = _frame_array.size(); (void)size;
const auto index = group.index, count = group.count;
fm_assert(index < size && index <= index + count && index + count <= size);
return { &_frame_array[index], count };
}
auto wall_atlas::frames(Direction_ dir, Group_ gr) const -> ArrayView<const Frame>
{
const auto* D = get_Direction(dir);
if (!D) [[unlikely]]
fm_throw("no such direction: {}"_cf, (int)dir);
const auto* G = group(*D, gr);
if (!G) [[unlikely]]
fm_throw("no such group {} for direction {}"_cf, (int)gr, (int)dir);
return { _frame_array.data() + G->index, G->count };
}
auto wall_atlas::group(Direction_ dir, Group_ gr) const -> const Group* { return group((size_t)dir, (size_t)gr); }
auto wall_atlas::group(size_t dir, Group_ gr) const -> const Group* { return group(dir, (size_t)gr); }
auto wall_atlas::group(size_t dir, size_t tag) const -> const Group*
{
fm_assert(tag < Group_COUNT);
if (const auto* D = direction(dir))
return group(*D, (Group_)tag);
else
return {};
}
auto wall_atlas::group(const Direction& dir, Group_ tag) -> const Group*
{
fm_assert(tag < Group_::COUNT);
const auto memfn = dir.groups[(size_t)tag].member;
if (const Group& ret = dir.*memfn; ret.is_defined)
return &ret;
else
return {};
}
auto wall_atlas::direction(size_t dir) const -> const Direction* { return get_Direction(Direction_(dir)); }
auto wall_atlas::direction(Direction_ dir) const -> const Direction* { return get_Direction(dir); }
auto wall_atlas::calc_direction(Direction_ dir) const -> const Direction&
{
if (auto dai = _direction_map[(size_t)dir]) [[likely]]
return _dir_array[dai.val];
CORRADE_ASSUME(dir < Direction_::COUNT);
Direction_ other;
switch (dir)
{
case Direction_::N: other = Direction_::W; break;
case Direction_::W: other = Direction_::N; break;
default: other = Direction_::COUNT;
}
if (other != Direction_::COUNT)
if (auto dai = _direction_map[(size_t)Direction_::N])
return _dir_array[dai.val];
fm_abort("wall_atlas: can't find direction '%d'", (int)dir);
}
uint8_t wall_atlas::direction_count() const { return (uint8_t)_dir_array.size(); }
auto wall_atlas::raw_frame_array() const -> ArrayView<const Frame> { return _frame_array; }
GL::Texture2D& wall_atlas::texture() { fm_debug_assert(_texture.id()); return _texture; }
Vector2ui wall_atlas::image_size() const { return _image_size; }
size_t wall_atlas::enum_to_index(enum rotation r)
{
static_assert(rotation_COUNT == rotation{8});
fm_debug_assert(r < rotation_COUNT);
auto x = uint8_t(r);
x >>= 1;
return x;
}
} // namespace floormat
namespace floormat::Wall {
const Group& Direction::group(Group_ i) const { return const_cast<Direction&>(*this).group((size_t)i); }
const Group& Direction::group(size_t i) const { return const_cast<Direction&>(*this).group(i); }
Group& Direction::group(Group_ i) { return group((size_t)i); }
Group& Direction::group(size_t i)
{
fm_assert(i < Group_COUNT);
auto ptr = groups[i].member;
return this->*ptr;
}
bool Frame::operator==(const Frame&) const noexcept = default;
bool Direction::operator==(const Direction&) const noexcept = default;
bool Info::operator==(const Info&) const noexcept = default;
bool DirArrayIndex::operator==(const DirArrayIndex&) const noexcept = default;
bool Group::operator==(const Group&) const noexcept = default;
} // namespace floormat::Wall
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