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#include "impl.hpp"
#include "src/loader.hpp"
#include "src/tile-atlas.hpp"
#include "compat/assert.hpp"
#include "compat/alloca.hpp"
#include "src/anim-atlas.hpp"
#include "src/emplacer.hpp"
#include <unordered_map>
#include <utility>
#include <memory>
#include <optional>
#include <Corrade/Containers/Pair.h>
#include <Corrade/Containers/ArrayViewStl.h>
#include <Corrade/Containers/StringView.h>
#include <Corrade/Containers/StringStlHash.h>
#include <Corrade/PluginManager/PluginManager.h>
#include <Corrade/Utility/Resource.h>
#include <Corrade/Utility/Path.h>
#include <Magnum/ImageView.h>
#include <Magnum/Trade/AbstractImporter.h>
#include <Magnum/Trade/ImageData.h>
#include <Magnum/Trade/AbstractImageConverter.h>
#ifdef __GNUG__
#pragma GCC diagnostic ignored "-Walloca"
#endif
namespace floormat {
struct loader_impl final : loader_
{
std::optional<Utility::Resource> shader_res;
PluginManager::Manager<Trade::AbstractImporter> importer_plugins;
Containers::Pointer<Trade::AbstractImporter> image_importer =
importer_plugins.loadAndInstantiate("StbImageImporter");
Containers::Pointer<Trade::AbstractImporter> tga_importer =
importer_plugins.loadAndInstantiate("TgaImporter");
std::unordered_map<StringView, std::shared_ptr<struct tile_atlas>> tile_atlas_map;
std::unordered_map<StringView, std::shared_ptr<struct anim_atlas>> anim_atlas_map;
std::vector<String> anim_atlases;
StringView shader(StringView filename) override;
template<std::size_t N> Trade::ImageData2D texture(const char(&prefix)[N], StringView filename);
std::shared_ptr<struct tile_atlas> tile_atlas(StringView filename, Vector2ub size) override;
ArrayView<String> anim_atlas_list() override;
std::shared_ptr<struct anim_atlas> anim_atlas(StringView name) override;
void get_anim_atlas_list();
static void set_application_working_directory();
explicit loader_impl();
~loader_impl() override;
};
StringView loader_impl::shader(StringView filename)
{
if (!shader_res)
shader_res = std::make_optional<Utility::Resource>("floormat/shaders");
auto ret = shader_res->getString(filename);
if (ret.isEmpty())
fm_abort("can't find shader resource '%s'", filename.cbegin());
return ret;
}
std::shared_ptr<tile_atlas> loader_impl::tile_atlas(StringView name, Vector2ub size)
{
const emplacer e{[&] { return std::make_shared<struct tile_atlas>(name, texture(FM_IMAGE_PATH, name), size); }};
auto atlas = tile_atlas_map.try_emplace(name, e).first->second;
tile_atlas_map[atlas->name()] = atlas;
return atlas;
}
template<std::size_t N>
fm_noinline
Trade::ImageData2D loader_impl::texture(const char(&prefix)[N], StringView filename_)
{
if constexpr(N > 1)
fm_assert(prefix[N-2] == '/');
fm_assert(filename_.size() < 4096);
fm_assert(filename_.find('\\') == filename_.end());
fm_assert(filename_.find('\0') == filename_.end());
fm_assert(tga_importer);
constexpr std::size_t max_extension_length = 16;
char* const filename = (char*)alloca(filename_.size() + N + max_extension_length);
const std::size_t len = fm_begin(
std::size_t off = N-1;
if constexpr(N > 1)
std::memcpy(filename, prefix, off);
std::memcpy(filename + off, filename_.cbegin(), filename_.size());
return off + filename_.size();
);
for (const auto& extension : std::initializer_list<StringView>{ ".tga", ".png", ".webp", })
{
std::memcpy(filename + len, extension.data(), extension.size());
filename[len + extension.size()] = '\0';
auto& importer = extension == StringView(".tga") ? tga_importer : image_importer;
if (Path::exists(filename) && importer->openFile(filename))
{
auto img = importer->image2D(0);
if (!img)
fm_abort("can't allocate image for '%s'", filename);
auto ret = std::move(*img);
return ret;
}
}
const auto path = Path::currentDirectory();
filename[len] = '\0';
fm_abort("can't open image '%s' (cwd '%s')", filename, path ? path->data() : "(null)");
}
ArrayView<String> loader_impl::anim_atlas_list()
{
if (anim_atlases.empty())
get_anim_atlas_list();
return anim_atlases;
}
std::shared_ptr<anim_atlas> loader_impl::anim_atlas(StringView name)
{
if (auto it = anim_atlas_map.find(name); it != anim_atlas_map.end())
return it->second;
else
{
const auto path = Path::join(FM_ANIM_PATH, Path::splitExtension(name).first());
auto anim_info = loader_detail::deserialize_anim(path + ".json");
auto tex = texture("", path);
fm_assert(!anim_info.anim_name.isEmpty() && !anim_info.object_name.isEmpty());
fm_assert(anim_info.pixel_size.product() > 0);
fm_assert(!anim_info.groups.empty());
fm_assert(anim_info.nframes > 0);
fm_assert(anim_info.nframes == 1 || anim_info.fps > 0);
auto atlas = std::make_shared<struct anim_atlas>(path, tex, std::move(anim_info));
return anim_atlas_map[atlas->name()] = atlas;
}
}
void loader_impl::get_anim_atlas_list()
{
anim_atlases.clear();
anim_atlases.reserve(64);
using f = Path::ListFlag;
constexpr auto flags = f::SkipDirectories | f::SkipDotAndDotDot | f::SkipSpecial | f::SortAscending;
if (const auto list = Path::list(FM_ANIM_PATH, flags); list)
for (StringView str : *list)
if (str.hasSuffix(".json"))
anim_atlases.emplace_back(str.exceptSuffix(std::size(".json")-1));
}
void loader_::destroy()
{
loader.~loader_();
new (&loader) loader_impl();
}
void loader_impl::set_application_working_directory()
{
static bool once = false;
if (once)
return;
once = true;
if (const auto loc = Path::executableLocation())
{
auto path = *loc;
if (const auto pos = path.findLast('/'); pos)
{
const auto size = std::size_t(pos.data() - path.data());
path = path.prefix(size);
loader_detail::chdir(Path::join(path, ".."));
return;
}
}
fm_warn("can't find install prefix!");
}
loader_impl::loader_impl()
{
set_application_working_directory();
}
loader_impl::~loader_impl() = default;
static loader_& make_default_loader()
{
static loader_impl loader_singleton{};
return loader_singleton;
}
// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
loader_& loader = make_default_loader();
} // namespace floormat
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