CUTextureLoader.h

//
//  CUTextureLoader.h
//  Cornell University Game Library (CUGL)
//
//  This module provides a specific implementation of the Loader class to load
//  textures. A texture asset is identified by both its source file and its
//  texture parameters.  Hence you may wish to load a texture asset multiple
//  times, though this is potentially wasteful regarding memory.
//
//  As with all of our loaders, this loader is designed to be attached to an
//  asset manager.  In addition, this class uses our standard shared-pointer
//  architecture.
//
//  1. The constructor does not perform any initialization; it just sets all
//     attributes to their defaults.
//
//  2. All initialization takes place via init methods, which can fail if an
//     object is initialized more than once.
//
//  3. All allocation takes place via static constructors which return a shared
//     pointer.
//
//
//  CUGL MIT License:
//      This software is provided 'as-is', without any express or implied
//      warranty.  In no event will the authors be held liable for any damages
//      arising from the use of this software.
//
//      Permission is granted to anyone to use this software for any purpose,
//      including commercial applications, and to alter it and redistribute it
//      freely, subject to the following restrictions:
//
//      1. The origin of this software must not be misrepresented; you must not
//      claim that you wrote the original software. If you use this software
//      in a product, an acknowledgment in the product documentation would be
//      appreciated but is not required.
//
//      2. Altered source versions must be plainly marked as such, and must not
//      be misrepresented as being the original software.
//
//      3. This notice may not be removed or altered from any source distribution.
//
//  Author: Walker White
//  Version: 1/7/16
//
#ifndef __CU_TEXTURE_LOADER_H__
#define __CU_TEXTURE_LOADER_H__
#include <cugl/assets/CULoader.h>
#include <cugl/renderer/CUTexture.h>
 
namespace cugl {
 
class TextureLoader : public Loader<Texture> {
private:
    CU_DISALLOW_COPY_AND_ASSIGN(TextureLoader);
    
protected:
    GLuint _minfilter;
    GLuint _magfilter;
    GLuint _wraps;
    GLuint _wrapt;
    bool _mipmaps;
    
#pragma mark Asset Loading
 
    void parseAtlas(const std::shared_ptr<JsonValue>& json, const std::shared_ptr<Texture>& texture);
    
    SDL_Surface* preload(const std::string& source);
    
    void materialize(const std::string& key, SDL_Surface* surface, LoaderCallback callback);
    
    void materialize(const std::shared_ptr<JsonValue>& json, SDL_Surface* surface, LoaderCallback callback);
    
 
    virtual bool read(const std::string& key, const std::string& source,
                      LoaderCallback callback, bool async) override;
    
    virtual bool read(const std::shared_ptr<JsonValue>& json,
                      LoaderCallback callback, bool async) override;
 
    virtual bool purge(const std::shared_ptr<JsonValue>& json) override;
    
public:
#pragma mark -
#pragma mark Constructors
 
    TextureLoader();
    
    void dispose() override {
        _assets.clear();
        _loader = nullptr;
    }
    
    static std::shared_ptr<TextureLoader> alloc() {
        std::shared_ptr<TextureLoader> result = std::make_shared<TextureLoader>();
        return (result->init() ? result : nullptr);
    }
 
    static std::shared_ptr<TextureLoader> alloc(const std::shared_ptr<ThreadPool>& threads) {
        std::shared_ptr<TextureLoader> result = std::make_shared<TextureLoader>();
        return (result->init(threads) ? result : nullptr);
    }
 
#pragma mark -
#pragma mark Properties
    
    GLuint getMinFilter() const { return _minfilter; }
    
    void setMinFilter(GLuint minFilter) { _minfilter = minFilter; }
    
    GLuint getMagFilter() const { return _magfilter; }
 
    void setMagFilter(GLuint magFilter) { _magfilter = magFilter; }
    
    GLuint getWrapS() const { return _wraps; }
    
    void setWrapS(GLuint wrap) { _wraps = wrap; }
    
    GLuint getWrapT() const { return _wrapt; }
 
    void setWrapT(GLuint wrap) { _wrapt = wrap; }
 
    bool hasMipMaps() const { return _mipmaps; }
    
    void setMipMaps(bool flag) { _mipmaps = flag; }
 
};
 
}
 
#endif /* __CU_TEXTURE_LOADER_H__ */