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#include "assetFactory.h"
#include "collections.hpp"
#include "cuboid.h"
#include "cylinder.h"
#include "filesystem.h"
#include "gfx/image.h"
#include "gfx/models/texture.h"
#include "modelFactoryMesh_fwd.h"
#include "object.h"
#include "plane.h"
#include "resource.h"
#include "saxParse-persistence.h"
#include "texturePacker.h"
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::Colours
AssetFactory::parseX11RGB(const char * path)
{
filesystem::FileStar rgb {path, "r"};
Colours out;
Colour colour;
char inname[BUFSIZ];
while (fscanf(rgb, "%f %f %f %[^\n\r]s", &colour.r, &colour.g, &colour.b, inname) == 4) {
std::string name {inname};
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.data() + 1]() mutable {
uint8_t channel;
std::from_chars(in, in + 2, channel, 16);
in += 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");
}
AssetFactory::TextureFragmentCoords
AssetFactory::getTextureCoords(std::string_view id) const
{
createTexutre();
const auto & fragmentUV = textureFragmentPositions.at(id);
return {
fragmentUV.xy(),
fragmentUV.zy(),
fragmentUV.zw(),
fragmentUV.xw(),
};
}
Asset::TexturePtr
AssetFactory::getTexture() const
{
createTexutre();
return texture;
}
void
AssetFactory::createTexutre() const
{
if (!textureFragments.empty() && (!texture || textureFragmentPositions.empty())) {
// * layout images
std::vector<TexturePacker::Image> imageSizes;
std::transform(
textureFragments.begin(), textureFragments.end(), std::back_inserter(imageSizes), [](const auto & tf) {
return TexturePacker::Image {tf.second->image->width, tf.second->image->height};
});
const auto [layout, outSize] = TexturePacker {imageSizes}.pack();
// * create texture
texture = std::make_shared<Texture>(outSize.x, outSize.y, TextureOptions {.wrap = GL_CLAMP_TO_EDGE});
std::transform(textureFragments.begin(), textureFragments.end(),
std::inserter(textureFragmentPositions, textureFragmentPositions.end()),
[position = layout.begin(), size = imageSizes.begin(), outSize = glm::vec2 {outSize}](
const auto & tf) mutable {
const auto positionFraction = glm::vec4 {*position, *position + *size} / outSize.xyxy();
glTexSubImage2D(GL_TEXTURE_2D, 0, static_cast<GLint>(position->x), static_cast<GLint>(position->y),
static_cast<GLint>(size->x), static_cast<GLint>(size->y), GL_RGBA, GL_UNSIGNED_BYTE,
tf.second->image->data.data());
position++;
size++;
return decltype(textureFragmentPositions)::value_type {tf.first, positionFraction};
});
}
}
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>;
return STORE_TYPE && STORE_NAME_HELPER("object", shapes, MapObjects)
&& STORE_NAME_HELPER("textureFragment", textureFragments, MapTextureFragments)
&& STORE_NAME_HELPER("asset", assets, MapAssets);
}
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