richk@6720: /* $Id$ */
richk@6720: 
richk@6720: #ifndef BLITTER_FACTORY_HPP
richk@6720: #define BLITTER_FACTORY_HPP
richk@6720: 
richk@6720: #include "base.hpp"
rubidium@6870: #include "../debug.h"
rubidium@6872: #include "../string_func.h"
richk@6720: #include <string>
richk@6720: #include <map>
richk@6720: 
richk@6720: /**
richk@6720:  * The base factory, keeping track of all blitters.
richk@6720:  */
richk@6720: class BlitterFactoryBase {
richk@6720: private:
richk@6720: 	char *name;
richk@6720: 	typedef std::map<std::string, BlitterFactoryBase *> Blitters;
richk@6720: 
richk@6720: 	static Blitters &GetBlitters()
richk@6720: 	{
richk@6720: 		static Blitters &s_blitters = *new Blitters();
richk@6720: 		return s_blitters;
richk@6720: 	}
richk@6720: 
richk@6720: 	static Blitter **GetActiveBlitter()
richk@6720: 	{
richk@6720: 		static Blitter *s_blitter = NULL;
richk@6720: 		return &s_blitter;
richk@6720: 	}
richk@6720: 
richk@6720: protected:
richk@6720: 	/**
richk@6720: 	 * Register a blitter internally, based on his name.
richk@6720: 	 * @param name the name of the blitter.
richk@6720: 	 * @note an assert() will be trigger if 2 blitters with the same name try to register.
richk@6720: 	 */
richk@6720: 	void RegisterBlitter(const char *name)
richk@6720: 	{
richk@6720: 		/* Don't register nameless Blitters */
richk@6720: 		if (name == NULL) return;
richk@6720: 
richk@6720: 		this->name = strdup(name);
rubidium@6872: #if !defined(NDEBUG) || defined(WITH_ASSERT)
richk@6725: 		/* NDEBUG disables asserts and gives a warning: unused variable 'P' */
richk@6725: 		std::pair<Blitters::iterator, bool> P =
richk@6725: #endif /* !NDEBUG */
richk@6725: 		GetBlitters().insert(Blitters::value_type(name, this));
richk@6720: 		assert(P.second);
richk@6720: 	}
richk@6720: 
richk@6720: public:
richk@6720: 	BlitterFactoryBase() :
richk@6720: 		name(NULL)
richk@6720: 	{}
richk@6720: 
richk@6720: 	virtual ~BlitterFactoryBase() { if (this->name != NULL) GetBlitters().erase(this->name); free(this->name); }
richk@6720: 
richk@6720: 	/**
richk@6720: 	 * Find the requested blitter and return his class.
richk@6720: 	 * @param name the blitter to select.
richk@6720: 	 * @post Sets the blitter so GetCurrentBlitter() returns it too.
richk@6720: 	 */
richk@6720: 	static Blitter *SelectBlitter(const char *name)
richk@6720: 	{
rubidium@6870: 		const char *default_blitter = "8bpp-optimized";
rubidium@6870: 
richk@6720: 		if (GetBlitters().size() == 0) return NULL;
rubidium@6870: 		const char *bname = (StrEmpty(name)) ? default_blitter : name;
richk@6720: 
richk@6720: 		Blitters::iterator it = GetBlitters().begin();
richk@6720: 		for (; it != GetBlitters().end(); it++) {
richk@6720: 			BlitterFactoryBase *b = (*it).second;
rubidium@6870: 			if (strcasecmp(bname, b->name) == 0) {
richk@6720: 				Blitter *newb = b->CreateInstance();
richk@6720: 				delete *GetActiveBlitter();
richk@6720: 				*GetActiveBlitter() = newb;
rubidium@6870: 
rubidium@6870: 				DEBUG(driver, 1, "Successfully %s blitter '%s'",StrEmpty(name) ? "probed" : "loaded", bname);
richk@6720: 				return newb;
richk@6720: 			}
richk@6720: 		}
richk@6720: 		return NULL;
richk@6720: 	}
richk@6720: 
richk@6720: 	/**
richk@6720: 	 * Get the current active blitter (always set by calling SelectBlitter).
richk@6720: 	 */
richk@6720: 	static Blitter *GetCurrentBlitter()
richk@6720: 	{
richk@6720: 		return *GetActiveBlitter();
richk@6720: 	}
richk@6720: 
richk@6720: 
richk@6720: 	static char *GetBlittersInfo(char *p, const char *last)
richk@6720: 	{
richk@6720: 		p += snprintf(p, last - p, "List of blitters:\n");
richk@6720: 		Blitters::iterator it = GetBlitters().begin();
richk@6720: 		for (; it != GetBlitters().end(); it++) {
richk@6720: 			BlitterFactoryBase *b = (*it).second;
richk@6720: 			p += snprintf(p, last - p, "%18s: %s\n", b->name, b->GetDescription());
richk@6720: 		}
richk@6720: 		p += snprintf(p, last - p, "\n");
richk@6720: 
richk@6720: 		return p;
richk@6720: 	}
richk@6720: 
richk@6720: 	/**
richk@6720: 	 * Get a nice description of the blitter-class.
richk@6720: 	 */
richk@6720: 	virtual const char *GetDescription() = 0;
richk@6720: 
richk@6720: 	/**
richk@6720: 	 * Create an instance of this Blitter-class.
richk@6720: 	 */
richk@6720: 	virtual Blitter *CreateInstance() = 0;
richk@6720: };
richk@6720: 
richk@6720: /**
richk@6720:  * A template factory, so ->GetName() works correctly. This because else some compiler will complain.
richk@6720:  */
richk@6720: template <class T>
richk@6720: class BlitterFactory: public BlitterFactoryBase {
richk@6720: public:
richk@6720: 	BlitterFactory() { this->RegisterBlitter(((T *)this)->GetName()); }
richk@6720: 
richk@6720: 	/**
richk@6720: 	 * Get the long, human readable, name for the Blitter-class.
richk@6720: 	 */
richk@6720: 	const char *GetName();
richk@6720: };
richk@6720: 
rubidium@6872: extern char _ini_blitter[32];
rubidium@6872: 
richk@6720: #endif /* BLITTER_FACTORY_HPP */