rubidium@9628: /* $Id$ */
rubidium@9628: 
rubidium@10455: /** @file factory.hpp Factory to 'query' all available blitters. */
rubidium@10455: 
rubidium@9628: #ifndef BLITTER_FACTORY_HPP
rubidium@9628: #define BLITTER_FACTORY_HPP
rubidium@9628: 
rubidium@9628: #include "base.hpp"
rubidium@9703: #include "../debug.h"
rubidium@9723: #include "../string_func.h"
rubidium@9628: #include <string>
rubidium@9628: #include <map>
rubidium@9628: 
rubidium@9628: /**
rubidium@9628:  * The base factory, keeping track of all blitters.
rubidium@9628:  */
rubidium@9628: class BlitterFactoryBase {
rubidium@9628: private:
rubidium@9628: 	char *name;
rubidium@9628: 	typedef std::map<std::string, BlitterFactoryBase *> Blitters;
rubidium@9628: 
rubidium@9628: 	static Blitters &GetBlitters()
rubidium@9628: 	{
rubidium@9628: 		static Blitters &s_blitters = *new Blitters();
rubidium@9628: 		return s_blitters;
rubidium@9628: 	}
rubidium@9628: 
rubidium@9628: 	static Blitter **GetActiveBlitter()
rubidium@9628: 	{
rubidium@9628: 		static Blitter *s_blitter = NULL;
rubidium@9628: 		return &s_blitter;
rubidium@9628: 	}
rubidium@9628: 
rubidium@9628: protected:
rubidium@9628: 	/**
rubidium@9628: 	 * Register a blitter internally, based on his name.
rubidium@9628: 	 * @param name the name of the blitter.
rubidium@9628: 	 * @note an assert() will be trigger if 2 blitters with the same name try to register.
rubidium@9628: 	 */
rubidium@9628: 	void RegisterBlitter(const char *name)
rubidium@9628: 	{
rubidium@9628: 		/* Don't register nameless Blitters */
rubidium@9628: 		if (name == NULL) return;
rubidium@9628: 
rubidium@9628: 		this->name = strdup(name);
rubidium@9723: #if !defined(NDEBUG) || defined(WITH_ASSERT)
rubidium@9686: 		/* NDEBUG disables asserts and gives a warning: unused variable 'P' */
rubidium@9686: 		std::pair<Blitters::iterator, bool> P =
rubidium@9686: #endif /* !NDEBUG */
rubidium@9686: 		GetBlitters().insert(Blitters::value_type(name, this));
rubidium@9628: 		assert(P.second);
rubidium@9628: 	}
rubidium@9628: 
rubidium@9628: public:
rubidium@9628: 	BlitterFactoryBase() :
rubidium@9628: 		name(NULL)
rubidium@9628: 	{}
rubidium@9628: 
rubidium@9628: 	virtual ~BlitterFactoryBase() { if (this->name != NULL) GetBlitters().erase(this->name); free(this->name); }
rubidium@9628: 
rubidium@9628: 	/**
rubidium@9628: 	 * Find the requested blitter and return his class.
rubidium@9628: 	 * @param name the blitter to select.
rubidium@9628: 	 * @post Sets the blitter so GetCurrentBlitter() returns it too.
rubidium@9628: 	 */
rubidium@9628: 	static Blitter *SelectBlitter(const char *name)
rubidium@9628: 	{
rubidium@9703: 		const char *default_blitter = "8bpp-optimized";
rubidium@9703: 
rubidium@9628: 		if (GetBlitters().size() == 0) return NULL;
rubidium@9703: 		const char *bname = (StrEmpty(name)) ? default_blitter : name;
rubidium@9628: 
rubidium@9628: 		Blitters::iterator it = GetBlitters().begin();
rubidium@9628: 		for (; it != GetBlitters().end(); it++) {
rubidium@9628: 			BlitterFactoryBase *b = (*it).second;
rubidium@9703: 			if (strcasecmp(bname, b->name) == 0) {
rubidium@9628: 				Blitter *newb = b->CreateInstance();
rubidium@9631: 				delete *GetActiveBlitter();
rubidium@9628: 				*GetActiveBlitter() = newb;
rubidium@9703: 
rubidium@9703: 				DEBUG(driver, 1, "Successfully %s blitter '%s'",StrEmpty(name) ? "probed" : "loaded", bname);
rubidium@9628: 				return newb;
rubidium@9628: 			}
rubidium@9628: 		}
rubidium@9628: 		return NULL;
rubidium@9628: 	}
rubidium@9628: 
rubidium@9628: 	/**
rubidium@9628: 	 * Get the current active blitter (always set by calling SelectBlitter).
rubidium@9628: 	 */
rubidium@9628: 	static Blitter *GetCurrentBlitter()
rubidium@9628: 	{
rubidium@9628: 		return *GetActiveBlitter();
rubidium@9628: 	}
rubidium@9628: 
rubidium@9628: 
rubidium@9628: 	static char *GetBlittersInfo(char *p, const char *last)
rubidium@9628: 	{
rubidium@9628: 		p += snprintf(p, last - p, "List of blitters:\n");
rubidium@9628: 		Blitters::iterator it = GetBlitters().begin();
rubidium@9628: 		for (; it != GetBlitters().end(); it++) {
rubidium@9628: 			BlitterFactoryBase *b = (*it).second;
rubidium@9628: 			p += snprintf(p, last - p, "%18s: %s\n", b->name, b->GetDescription());
rubidium@9628: 		}
rubidium@9628: 		p += snprintf(p, last - p, "\n");
rubidium@9628: 
rubidium@9628: 		return p;
rubidium@9628: 	}
rubidium@9628: 
rubidium@9628: 	/**
rubidium@9628: 	 * Get a nice description of the blitter-class.
rubidium@9628: 	 */
rubidium@9628: 	virtual const char *GetDescription() = 0;
rubidium@9628: 
rubidium@9628: 	/**
rubidium@9628: 	 * Create an instance of this Blitter-class.
rubidium@9628: 	 */
rubidium@9628: 	virtual Blitter *CreateInstance() = 0;
rubidium@9628: };
rubidium@9628: 
rubidium@9628: /**
rubidium@9628:  * A template factory, so ->GetName() works correctly. This because else some compiler will complain.
rubidium@9628:  */
rubidium@9628: template <class T>
rubidium@9628: class BlitterFactory: public BlitterFactoryBase {
rubidium@9628: public:
rubidium@9628: 	BlitterFactory() { this->RegisterBlitter(((T *)this)->GetName()); }
rubidium@9628: 
rubidium@9628: 	/**
rubidium@9628: 	 * Get the long, human readable, name for the Blitter-class.
rubidium@9628: 	 */
rubidium@9628: 	const char *GetName();
rubidium@9628: };
rubidium@9628: 
rubidium@9724: extern char _ini_blitter[32];
rubidium@9724: 
rubidium@9628: #endif /* BLITTER_FACTORY_HPP */