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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_DATAERR 65 /* data format error */
# define EX_SOFTWARE 70 /* internal software error */
# define EX_CANTCREAT 73 /* can't create (user) output file */
# define EX_IOERR 74 /* input/output error */
#else
# include <sysexits.h>
#endif
struct file
{
cv::Mat4b mat;
Magnum::Vector2i ground_offset;
};
using Corrade::Utility::Error;
using Corrade::Utility::Debug;
static struct options_ {
std::optional<unsigned> width, height;
std::optional<double> scale;
} options;
using std::filesystem::path;
static
std::tuple<cv::Vec2i, cv::Vec2i, bool>
find_image_bounds(const 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 << "contains only fully transparent pixels!";
return {{}, {}, false};
}
return {start, end, true};
}
static bool load_file(anim_group& group, const path& filename, const path& output_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 << "as RGBA32 image";
return cv::Mat4b{};
}
return cv::Mat4b(std::move(mat_));
);
if (mat.empty())
return false;
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();
}
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;
return {};
}
cv::Mat4b resized{size};
cv::resize(mat({start, size}), resized, dest_size, 0, 0, cv::INTER_LANCZOS4);
if (!cv::imwrite(output_filename.string(), resized))
{
Error{} << "failed writing image" << output_filename;
return false;
}
Magnum::Vector2i ground = {
(int)std::round((group.ground[0] - start[0]) * *options.scale),
(int)std::round((group.ground[1] - start[1]) * *options.scale),
};
group.frames.push_back({ground});
return true;
}
static bool load_directory(anim_group& group, const path& dirname, const path& output_dir)
{
if (std::error_code ec{}; !std::filesystem::exists(dirname / ".", ec))
{
Error{} << "can't open directory" << dirname << ':' << ec.message();
return {};
}
int i;
for (i = 1; i <= 9999; i++)
{
char buf[9];
sprintf(buf, "%04d.png", i);
if (!std::filesystem::exists(dirname/buf))
break;
if (!load_file(group, dirname/buf, output_dir/buf))
return false;
}
if (i == 1)
{
Error{} << "no files in anim group directory" << dirname;
return false;
}
return true;
}
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", "");
args.parse(argc, argv);
const path output_dir = args.value<std::string>("output");
const path input_dir = args.value<std::string>("directory");
auto anim_info = anim::from_json(input_dir / "atlas.json");
//std::vector<dir> dirs; dirs.reserve((std::size_t)anim_direction::COUNT);
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;
}
try {
std::filesystem::create_directory(output_dir);
} catch (const std::filesystem::filesystem_error& error) {
Error{} << "failed to create output directory" << output_dir << ':' << error.what();
return EX_CANTCREAT;
}
for (std::size_t i = 0; i < (std::size_t)anim_direction::COUNT; i++)
{
auto group_name = anim_group::direction_to_string((anim_direction)i);
try {
std::filesystem::remove_all(output_dir/group_name);
std::filesystem::create_directory(output_dir/group_name);
} catch (const std::filesystem::filesystem_error& e) {
Error{} << "failed creating output directory" << group_name << ':' << e.what();
return EX_CANTCREAT;
}
auto& group = anim_info->groups[i];
group.frames.clear(); group.frames.reserve(64);
if (!load_directory(group, input_dir/group_name, input_dir/group_name))
return EX_DATAERR;
if (!anim_info->to_json(output_dir/"atlas.json"))
return EX_CANTCREAT;
}
return 0;
usage:
Error{Error::Flag::NoNewlineAtTheEnd} << Corrade::Containers::StringView{args.usage()};
return EX_USAGE;
}
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