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#include "../defs.hpp"
#include "serialize.hpp"
#include <Corrade/Utility/Arguments.h>
#include <Corrade/Utility/Debug.h>
#include <Corrade/Utility/DebugStl.h>
#include <opencv2/core/mat.hpp>
#include <opencv2/imgcodecs/imgcodecs.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui.hpp>
#include <optional>
#include <tuple>
#include <filesystem>
#include <algorithm>
#include <utility>
#include <cstring>
#include <cmath>
#undef MIN
#undef MAX
#ifdef _WIN32
# define EX_OK 0 /* successful termination */
# define EX_USAGE 64 /* command line usage error */
# define EX_SOFTWARE 70 /* internal software error */
# define EX_IOERR 74 /* input/output error */
#else
# include <sysexits.h>
#endif
#if 0
static std::string fix_path_separators(const std::filesystem::path& path)
{
auto str = path.string();
std::replace(str.begin(), str.end(), '\\', '/');
return str;
}
#endif
struct file
{
std::filesystem::path name;
cv::Mat4b mat;
cv::Point2i offset;
};
struct dir
{
std::filesystem::path name;
std::vector<file> files;
};
using Corrade::Utility::Error;
using Corrade::Utility::Debug;
static struct options_ {
std::optional<unsigned> width, height;
std::optional<double> scale;
cv::Vec2i offset{-1, -1};
} options;
static
std::tuple<cv::Vec2i, cv::Vec2i, bool>
find_image_bounds(const std::filesystem::path& path, const cv::Mat4b& mat)
{
cv::Vec2i start{mat.cols, mat.rows}, end{0, 0};
for (int y = 0; y < mat.rows; y++)
{
const auto* ptr = mat.ptr<cv::Vec4b>(y);
for (int x = 0; x < mat.cols; x++)
{
enum {R, G, B, A};
cv::Vec4b px = ptr[x];
if (px[A] != 0)
{
start[0] = std::min(x, start[0]);
start[1] = std::min(y, start[1]);
end[0] = std::max(x+1, end[0]);
end[1] = std::max(y+1, end[1]);
}
}
}
if (start[0] >= end[0] || start[1] >= end[1])
{
Error{} << "image" << path.string() << "contains only fully transparent pixels!";
return {{}, {}, false};
}
return {start, end, true};
}
static std::optional<file> load_file(const std::filesystem::path& filename)
{
auto mat = progn(
cv::Mat mat_ = cv::imread(filename.string(), cv::IMREAD_UNCHANGED);
if (mat_.empty() || mat_.type() != CV_8UC4)
{
Error{} << "failed to load" << filename.string() << "as RGBA32 image";
return cv::Mat4b{};
}
return cv::Mat4b(std::move(mat_));
);
if (mat.empty())
return {};
auto [start, end, bounds_ok] = find_image_bounds(filename, mat);
if (!bounds_ok)
return {};
cv::Size size{end - start}, dest_size;
if (!options.scale)
{
if (options.width)
options.scale = (double)*options.width / size.width;
else if (options.height)
options.scale = (double)*options.height / size.height;
else
std::abort();
}
cv::Vec2i offset = {
(int)std::round((options.offset[0] - start[0]) * *options.scale),
(int)std::round((options.offset[1] - start[1]) * *options.scale),
};
dest_size = {(int)std::round(*options.scale * size.width),
(int)std::round(*options.scale * size.height)};
if (size.width < dest_size.width || size.height < dest_size.height)
{
Error{} << "refusing to upscale image" << filename.string();
return {};
}
Debug{} << "file" << filename.string() << offset[0] << offset[1];
cv::Mat4b resized{size};
cv::resize(mat({start, size}), resized, dest_size, 0, 0, cv::INTER_LANCZOS4);
file ret { filename, resized.clone(), offset };
return std::make_optional(std::move(ret));
}
static std::optional<dir> load_directory(const std::filesystem::path& dirname)
{
if (std::error_code ec{}; !std::filesystem::exists(dirname / ".", ec))
{
Error{} << "can't open directory" << dirname.string() << ":" << ec.message();
return std::nullopt;
}
dir ret;
for (int i = 1; i <= 9999; i++)
{
char buf[9];
sprintf(buf, "%04d.png", i);
auto path = dirname / buf;
if (!std::filesystem::exists(path))
break;
auto file = load_file(path);
if (!file)
return std::nullopt;
ret.files.push_back(std::move(*file));
}
if (ret.files.empty())
{
Error{} << "directory" << dirname.string() << "is empty!";
return std::nullopt;
}
return std::make_optional(std::move(ret));
}
int main(int argc, char** argv)
{
Corrade::Utility::Arguments args{};
#ifdef _WIN32
if (auto* c = strrchr(argv[0], '\\'); c && c[1])
{
if (auto* s = strrchr(c, '.'); s && !strcmp(".exe", s))
*s = '\0';
args.setCommand(c+1);
}
#else
if (auto* c = strrchr(argv[0], '/'); c && c[1])
args.setCommand(c+1);
#endif
args.addOption('o', "output", "./output")
.addArgument("directory")
.addOption('W', "width", "")
.addOption('H', "height", "")
.addOption('x', "offset")
.setHelp("offset", {}, "WxH");
args.parse(argc, argv);
std::filesystem::path output = args.value<std::string>("output");
std::filesystem::path pathname = args.value<std::string>("directory");
std::vector<dir> dirs;
auto anim_info = anim::from_json(pathname / "atlas.json");
if (!anim_info)
goto usage;
if (unsigned w = args.value<unsigned>("width"); w != 0)
options.width = w;
if (unsigned h = args.value<unsigned>("height"); h != 0)
options.height = h;
if (!(!options.width ^ !options.height))
{
Error{} << "exactly one of --width, --height must be given";
goto usage;
}
{
auto str = args.value<std::string>("offset");
if (str.empty())
{
Error{} << "offset argument is required";
goto usage;
}
int x, y;
int ret = std::sscanf(str.c_str(), "%dx%d", &x, &y);
if (ret != 2)
{
Error{} << "can't parse offset --" << str;
goto usage;
}
options.offset = {x, y};
}
using anim_dir_t = std::underlying_type_t<anim_direction>;
for (auto i = (anim_dir_t)anim_direction::MIN; i < (anim_dir_t)anim_direction::MAX; i++)
{
auto name = anim_direction_group::anim_direction_string((anim_direction)i);
auto result = load_directory(pathname / name);
if (!result)
goto usage;
dirs.push_back(std::move(*result));
}
return 0;
usage:
Error{Error::Flag::NoNewlineAtTheEnd} << Corrade::Containers::StringView{args.usage()};
return EX_USAGE;
}
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