/*
Crafter®.Graphics
Copyright (C) 2025 Catcrafts®
Catcrafts.net

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3.0 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
*/

module;
#include "../lib/stb_image.h"
module Crafter.Graphics:Image_impl;
import :Image;
import std;

using namespace Crafter;

Image::Image(const std::string_view path) {
    std::filesystem::path abs = std::filesystem::absolute(path);
    int xSize;
    int ySize;
    unsigned char* bgData = stbi_load(abs.string().c_str(), &xSize, &ySize, nullptr, 4);

    buffer.resize(xSize*ySize);
    width = xSize;
    height = ySize;

    opaque = OpaqueType::FullyOpaque;

    for(std::uint_fast32_t x = 0; x < xSize; x++) {
        for(std::uint_fast32_t y = 0; y < ySize; y++) {
            std::uint_fast32_t idx = (x*ySize+y)*4;
            buffer[x*ySize+y].r = bgData[idx];
            buffer[x*ySize+y].g = bgData[idx+1];
            buffer[x*ySize+y].b = bgData[idx+2];
            buffer[x*ySize+y].a = bgData[idx+3];
        }
    }

    for(std::uint_fast32_t i = 0; i < xSize*ySize; i++) {
        if(buffer[i].a != 255) {
            opaque = OpaqueType::SemiOpaque;
            for(std::uint_fast32_t i2 = 0; i2 < xSize*ySize; i2++) {
                if(buffer[i2].a != 0 && buffer[i2].a != 255) {
                    opaque = OpaqueType::Transparent;
                    return;
                }
            }
            return;
        }
    }
}