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#include "atlas.hpp"
#include "src/anim.hpp"
#include <opencv2/imgcodecs.hpp>
#include "compat/assert.hpp" // must go below opencv headers
namespace floormat::Serialize {
void anim_atlas_row::add_entry(const anim_atlas_entry& x)
{
auto& frame = *x.frame;
const auto& mat = x.mat;
frame.offset = { xpos, ypos };
frame.size = { (unsigned)mat.cols, (unsigned)mat.rows };
fm_assert(mat.rows > 0 && mat.cols > 0);
data.push_back(x);
xpos += (unsigned)mat.cols;
max_height = std::max((unsigned)mat.rows, max_height);
}
void anim_atlas::advance_row()
{
auto& row = rows.back();
if (row.data.empty())
return;
fm_assert(row.xpos > 0);
fm_assert(row.max_height > 0);
ypos += row.max_height;
maxx = std::max(row.xpos, maxx);
rows.push_back({ {}, 0, 0, ypos });
}
Magnum::Vector2ui anim_atlas::offset() const noexcept
{
const auto& row = rows.back();
return { row.xpos, row.ypos };
}
Magnum::Vector2ui anim_atlas::size() const noexcept
{
const anim_atlas_row& row = rows.back();
// prevent accidentally writing out of bounds by forgetting to call
// anim_atlas::advance_row() one last time prior to anim_atlas::size()
return { std::max(maxx, row.xpos), ypos + row.max_height };
}
bool anim_atlas::dump(StringView filename) const
{
auto sz = size();
cv::Mat4b mat((int)sz[1], (int)sz[0]);
mat.setTo(0);
for (const anim_atlas_row& row : rows)
for (const anim_atlas_entry& x : row.data)
{
auto offset = x.frame->offset;
auto size = x.frame->size;
cv::Rect roi = { (int)offset[0], (int)offset[1], (int)size[0], (int)size[1] };
x.mat.copyTo(mat(roi));
}
return cv::imwrite(filename.data(), mat);
}
} // namespace floormat::Serialize
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