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Location: cpp/openttd-patchpack/source/src/blitter/factory.hpp - annotation
r10991:03cb1f1704fc
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(svn r15331) -Fix (r15330): remove extra semicolons
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/** @file factory.hpp Factory to 'query' all available blitters. */
#ifndef BLITTER_FACTORY_HPP
#define BLITTER_FACTORY_HPP
#include "base.hpp"
#include "../debug.h"
#include "../string_func.h"
#include "../core/string_compare_type.hpp"
#include <map>
#if defined(WITH_COCOA)
bool QZ_CanDisplay8bpp();
#endif /* defined(WITH_COCOA) */
/**
* The base factory, keeping track of all blitters.
*/
class BlitterFactoryBase {
private:
const char *name;
typedef std::map<const char *, BlitterFactoryBase *, StringCompare> Blitters;
static Blitters &GetBlitters()
{
static Blitters &s_blitters = *new Blitters();
return s_blitters;
}
static Blitter **GetActiveBlitter()
{
static Blitter *s_blitter = NULL;
return &s_blitter;
}
protected:
/**
* Register a blitter internally, based on his name.
* @param name the name of the blitter.
* @note an assert() will be trigger if 2 blitters with the same name try to register.
*/
void RegisterBlitter(const char *name)
{
/* Don't register nameless Blitters */
if (name == NULL) return;
this->name = strdup(name);
std::pair<Blitters::iterator, bool> P = GetBlitters().insert(Blitters::value_type(name, this));
assert(P.second);
}
public:
BlitterFactoryBase() :
name(NULL)
{}
virtual ~BlitterFactoryBase()
{
if (this->name == NULL) return;
GetBlitters().erase(this->name);
if (GetBlitters().empty()) delete &GetBlitters();
free((void *)this->name);
}
/**
* Find the requested blitter and return his class.
* @param name the blitter to select.
* @post Sets the blitter so GetCurrentBlitter() returns it too.
*/
static Blitter *SelectBlitter(const char *name)
{
#if defined(DEDICATED)
const char *default_blitter = "null";
#else
const char *default_blitter = "8bpp-optimized";
#if defined(WITH_COCOA)
/* Some people reported lack of fullscreen support in 8 bpp mode.
* While we prefer 8 bpp since it's faster, we will still have to test for support. */
if (!QZ_CanDisplay8bpp()) {
/* The main display can't go to 8 bpp fullscreen mode.
* We will have to switch to 32 bpp by default. */
default_blitter = "32bpp-anim";
}
#endif /* defined(WITH_COCOA) */
#endif /* defined(DEDICATED) */
if (GetBlitters().size() == 0) return NULL;
const char *bname = (StrEmpty(name)) ? default_blitter : name;
Blitters::iterator it = GetBlitters().begin();
for (; it != GetBlitters().end(); it++) {
BlitterFactoryBase *b = (*it).second;
if (strcasecmp(bname, b->name) == 0) {
Blitter *newb = b->CreateInstance();
delete *GetActiveBlitter();
*GetActiveBlitter() = newb;
DEBUG(driver, 1, "Successfully %s blitter '%s'",StrEmpty(name) ? "probed" : "loaded", bname);
return newb;
}
}
return NULL;
}
/**
* Get the current active blitter (always set by calling SelectBlitter).
*/
static Blitter *GetCurrentBlitter()
{
return *GetActiveBlitter();
}
static char *GetBlittersInfo(char *p, const char *last)
{
p += seprintf(p, last, "List of blitters:\n");
Blitters::iterator it = GetBlitters().begin();
for (; it != GetBlitters().end(); it++) {
BlitterFactoryBase *b = (*it).second;
p += seprintf(p, last, "%18s: %s\n", b->name, b->GetDescription());
}
p += seprintf(p, last, "\n");
return p;
}
/**
* Get a nice description of the blitter-class.
*/
virtual const char *GetDescription() = 0;
/**
* Create an instance of this Blitter-class.
*/
virtual Blitter *CreateInstance() = 0;
};
/**
* A template factory, so ->GetName() works correctly. This because else some compiler will complain.
*/
template <class T>
class BlitterFactory: public BlitterFactoryBase {
public:
BlitterFactory() { this->RegisterBlitter(((T *)this)->GetName()); }
/**
* Get the long, human readable, name for the Blitter-class.
*/
const char *GetName();
};
extern char *_ini_blitter;
#endif /* BLITTER_FACTORY_HPP */
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