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#include "assetFactory.h"
#include "collections.h"
#include "cuboid.h"
#include "cylinder.h"
#include "filesystem.h"
#include "gfx/image.h"
#include "gfx/models/texture.h"
#include "object.h"
#include "plane.h"
#include "saxParse-persistence.h"
#include "texturePacker.h"
#include <fstream>
#include <numeric>
AssetFactory::AssetFactory() :
shapes {
{"plane", std::make_shared<Plane>()},
{"cuboid", std::make_shared<Cuboid>()},
{"cylinder", std::make_shared<Cylinder>()},
},
colours {parseX11RGB("/usr/share/X11/rgb.txt")}
{
}
std::shared_ptr<AssetFactory>
AssetFactory::loadXML(const std::filesystem::path & filename)
{
filesystem::FileStar file {filename.c_str(), "r"};
return Persistence::SAXParsePersistence {}.loadState<std::shared_ptr<AssetFactory>>(file);
}
AssetFactory::Assets
AssetFactory::loadAll(const std::filesystem::path & root)
{
return std::accumulate(std::filesystem::recursive_directory_iterator {root},
std::filesystem::recursive_directory_iterator {}, Assets {}, [](auto out, const auto & path) {
if (path.path().extension() == ".xml") {
out.merge(loadXML(path)->assets);
}
return std::move(out);
});
}
AssetFactory::Colours
AssetFactory::parseX11RGB(const char * path)
{
std::ifstream rgb {path};
Colours out;
while (rgb.good()) {
Colour colour;
std::string name;
rgb >> colour.r >> colour.g >> colour.b;
std::getline(rgb, name);
if (rgb.good()) {
normalizeColourName(name);
out.emplace(std::move(name), colour / 255.F);
}
}
return out;
}
void
AssetFactory::normalizeColourName(std::string & name)
{
std::erase_if(name, ::isblank);
name *= [l = std::locale {}](auto & ch) {
ch = std::tolower(ch, l);
};
}
AssetFactory::ColourAlpha
AssetFactory::parseColour(std::string_view in) const
{
if (in.empty()) {
throw std::runtime_error("Empty colour specification");
}
if (in[0] == '#') {
if (in.length() > 9 || in.length() % 2 == 0) {
throw std::runtime_error("Invalid hex colour specification");
}
ColourAlpha out {0, 0, 0, 1};
std::generate_n(&out.r, (in.length() - 1) / 2, [in = in.substr(1)]() mutable {
const auto hexpair = in.substr(0, 2);
uint8_t channel = 0;
std::from_chars(hexpair.begin(), hexpair.end(), channel, 16);
in.remove_prefix(2);
return static_cast<float>(channel) / 255.F;
});
return out;
}
if (auto mf = Persistence::ParseBase::getShared<const AssetFactory>("assetFactory")) {
if (const auto colour = mf->colours.find(in); colour != mf->colours.end()) {
return {colour->second, 1};
}
}
throw std::runtime_error("No such asset factory colour");
}
GLuint
AssetFactory::getMaterialIndex(std::string_view id) const
{
createTexutre();
return textureFragmentPositions.at(id);
}
Asset::TexturePtr
AssetFactory::getTexture() const
{
createTexutre();
return texture;
}
void
AssetFactory::createTexutre() const
{
if (!textureFragments.empty() && !texture) {
// * layout images
std::map<const TextureFragment *, std::unique_ptr<const Image>> images;
std::transform(
textureFragments.begin(), textureFragments.end(), std::inserter(images, images.end()), [](auto && tf) {
return decltype(images)::value_type {tf.second.get(), tf.second->image->get()};
});
std::vector<TexturePacker::Image> imageSizes;
std::transform(images.begin(), images.end(), std::back_inserter(imageSizes), [](const auto & i) {
return TexturePacker::Image {i.second->width, i.second->height};
});
const auto [layout, outSize] = TexturePacker {imageSizes}.pack();
// * create texture
texture = std::make_shared<TextureAtlas>(outSize.x, outSize.y, layout.size());
std::transform(images.begin(), images.end(),
std::inserter(textureFragmentPositions, textureFragmentPositions.end()),
[position = layout.begin(), size = imageSizes.begin(), this](const auto & i) mutable {
const auto m = texture->add(*position, *size, i.second->data.data(),
{
.wrapU = i.first->mapmodeU,
.wrapV = i.first->mapmodeV,
});
position++;
size++;
return decltype(textureFragmentPositions)::value_type {i.first->id, m};
});
}
}
bool
AssetFactory::persist(Persistence::PersistenceStore & store)
{
using MapObjects = Persistence::MapByMember<Shapes, std::shared_ptr<Object>>;
using MapAssets = Persistence::MapByMember<Assets>;
using MapTextureFragments = Persistence::MapByMember<TextureFragments>;
using MapAssImp = Persistence::MapByMember<AssImps, std::shared_ptr<AssImp>, &AssImp::path>;
return STORE_TYPE && STORE_NAME_HELPER("object", shapes, MapObjects)
&& STORE_NAME_HELPER("textureFragment", textureFragments, MapTextureFragments)
&& STORE_NAME_HELPER("assimp", assimps, MapAssImp) && STORE_NAME_HELPER("asset", assets, MapAssets);
}
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