SpineAtlasResource.cpp

//
// Created by Raymond_Lx on 2020/6/2.
//

#include "SpineAtlasResource.h"
#include "core/io/json.h"

#include <spine/Atlas.h>

class RaiixSpineTextureLoader : public spine::TextureLoader {
private:
    Array *tex_list, *ntex_list;
    String normal_tex_prefix;
public:

    RaiixSpineTextureLoader(Array *t, Array *nt, const String &p):tex_list(t), ntex_list(nt), normal_tex_prefix(p){
        if (tex_list) tex_list->clear();
        if (ntex_list) ntex_list->clear();
    }

    String fixPathIssue(const String &path){
        if(path.size() > 5 && path[4] == '/' && path[5] == '/') return path;
        const String prefix = "res:/";
        auto i = path.find(prefix);
//        print_line(String("Found i at ") + String(Variant(i)));
        auto sub_str_pos = i+prefix.size()-1;
        if(sub_str_pos < 0) return path;
        auto res = path.substr(sub_str_pos);
//        print_line(String("rest of it: ") + res);
        if(res.size() > 0)
        {
            if(res[0] != '/')
            {
                return prefix + "/" + res;
            } else
            {
                return  prefix + res;
            }
        }
        return path;
    }

    virtual void load(spine::AtlasPage &page, const spine::String &path){
        Error err = OK;

//		print_line(String("Spine is loading texture: ") + String(path.buffer()));
        auto fixed_path = fixPathIssue(String(path.buffer()));
//        print_line("Fixed path: " + fixed_path);

		// Load texture (e.g. tex.png)
		Ref<Texture> tex = ResourceLoader::load(fixed_path, "", false, &err);
		if (err != OK) {
            print_error(vformat("Can't load texture: \"%s\"", String(path.buffer())));
            page.setRendererObject((void*)memnew(SpineRendererObject {nullptr}));
            return;
		}

		if (tex_list) tex_list->append(tex);
		auto p_spine_renderer_object = memnew(SpineRendererObject);
		p_spine_renderer_object->tex = tex;

		// Load normal texture (e.g. n_tex.png)
		String temppath = fixed_path;
		String newpath = vformat("%s/%s_%s", temppath.get_base_dir(), normal_tex_prefix, temppath.get_file());
//        print_line(vformat("try n tex: %s", newpath));
		if (ResourceLoader::exists(newpath)){
			Ref<Texture> normal_tex = ResourceLoader::load(newpath);
			if (ntex_list) ntex_list->append(normal_tex);
			p_spine_renderer_object->normal_tex = normal_tex;

			// print_line(String("From atlas resource load: ") + String(" ro ") + String(Variant((long long) p_spine_renderer_object)));
			// print_line(String("From atlas resource load: ") + String(Variant(p_spine_renderer_object->tex)) + String(", ") + String(Variant(p_spine_renderer_object->normal_tex)));
		}

		page.setRendererObject((void*)p_spine_renderer_object);		

		page.width = tex->get_width();
		page.height = tex->get_height();
    }

    virtual void unload(void *p){
		// print_line("I'm out.");
		auto p_spine_renderer_object = (SpineRendererObject*) p;
        Ref<Texture> &tex = p_spine_renderer_object->tex;
		Ref<Texture> &normal_tex = p_spine_renderer_object->normal_tex;

		if (tex.is_valid()) tex.unref();
		if (normal_tex.is_valid()) normal_tex.unref();

		memdelete(p_spine_renderer_object);
    }
};

SpineAtlasResource::SpineAtlasResource():atlas(nullptr), normal_texture_prefix("n"){}
SpineAtlasResource::~SpineAtlasResource(){
    if (atlas) delete atlas;
}

void SpineAtlasResource::_bind_methods(){
    ClassDB::bind_method(D_METHOD("load_from_atlas_file", "path"), &SpineAtlasResource::load_from_atlas_file);

    ClassDB::bind_method(D_METHOD("get_source_path"), &SpineAtlasResource::get_source_path);

	ClassDB::bind_method(D_METHOD("get_textures"), &SpineAtlasResource::get_textures);
	ClassDB::bind_method(D_METHOD("get_normal_textures"), &SpineAtlasResource::get_normal_textures);

	ADD_PROPERTY(PropertyInfo(Variant::STRING, "source_path"), "", "get_source_path");
	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "textures"), "", "get_textures");
	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "normal_textures"), "", "get_normal_textures");
}


Array SpineAtlasResource::get_textures() {
	return tex_list;
}

Array SpineAtlasResource::get_normal_textures() {
    return ntex_list;
}

String SpineAtlasResource::get_source_path() {
    return source_path;
}

Error SpineAtlasResource::load_from_atlas_file(const String &p_path) {
//    print_line(vformat("Importing atlas file: %s", p_path));
    source_path = p_path;

    Error err;

    atlas_data = FileAccess::get_file_as_string(p_path, &err);
    if (err != OK) return err;

    if (atlas) delete atlas;
    tex_list.clear();
    ntex_list.clear();
    atlas = new spine::Atlas(atlas_data.utf8(), atlas_data.size(), source_path.get_base_dir().utf8(), new RaiixSpineTextureLoader(&tex_list, &ntex_list, normal_texture_prefix));

//    print_line(vformat("atlas loaded!"));

    if (atlas)
        return OK;

    tex_list.clear();
    ntex_list.clear();

    return ERR_FILE_UNRECOGNIZED;
}

Error SpineAtlasResource::load_from_file(const String &p_path) {
    Error err;

    String json_string = FileAccess::get_file_as_string(p_path, &err);
    if (err != OK) return err;

    String error_string;
    int error_line;
    JSON json;
    Variant result;
    err = json.parse(json_string, result, error_string, error_line);
    if (err != OK) {
        return err;
    }

    Dictionary content = Dictionary(result);

    source_path = content["source_path"];
    atlas_data = content["atlas_data"];
    normal_texture_prefix = content["normal_texture_prefix"];

    if (atlas) delete atlas;
    tex_list.clear();
    ntex_list.clear();
    atlas = new spine::Atlas(atlas_data.utf8(), atlas_data.size(), source_path.get_base_dir().utf8(), new RaiixSpineTextureLoader(&tex_list, &ntex_list, normal_texture_prefix));

    if (atlas)
        return OK;

    tex_list.clear();
    ntex_list.clear();
    return ERR_FILE_UNRECOGNIZED;
}

Error SpineAtlasResource::save_to_file(const String &p_path) {
    Error err;
    FileAccess *file = FileAccess::open(p_path, FileAccess::WRITE, &err);
    if (err != OK) {
//        print_line(vformat("save file err: %d", err));
        if (file) file->close();
        return err;
    }

    Dictionary content;
    content["source_path"] = source_path;
    content["atlas_data"] = atlas_data;
    content["normal_texture_prefix"] = normal_texture_prefix;

//    print_line(vformat("storing source_path: %s", source_path));

    file->store_string(JSON::print(content));
    file->close();

    return OK;
}