axmol/cocos2dx/textures/CCTextureCache.cpp

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

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#include <stack>
#include <string>
#include <cctype>
#include "CCTextureCache.h"
#include "CCTexture2D.h"
#include "ccMacros.h"
#include "CCData.h"
#include "CCDirector.h"
#include "platform/platform.h"
#include "CCFileUtils.h"
#include "CCImage.h"
#include "support/file_support/FileData.h"

namespace   cocos2d {

class CCAsyncObject : CCObject
{
public:
	fpAsyncCallback m_pfnCallback;
	CCObject* m_pTarget;
	std::string *  m_pData;
public:
	CCAsyncObject();
	~CCAsyncObject()
	{
		CCLOGINFO("cocos2d: deallocing CCAsyncObject.");
		CC_SAFE_DELETE(m_pTarget);
		CC_SAFE_DELETE(m_pData);
	}
};

// implementation CCTextureCache

// TextureCache - Alloc, Init & Dealloc
static CCTextureCache *g_sharedTextureCache;

CCTextureCache * CCTextureCache::sharedTextureCache()
{
	if (!g_sharedTextureCache)
		g_sharedTextureCache = new CCTextureCache();

	return g_sharedTextureCache;
}

CCTextureCache::CCTextureCache()
{
	CCAssert(g_sharedTextureCache == NULL, "Attempted to allocate a second instance of a singleton.");
	
	m_pTextures = new CCMutableDictionary<std::string, CCTexture2D*>();
	m_pDictLock = new CCLock();
	m_pContextLock = new CCLock();
}

CCTextureCache::~CCTextureCache()
{
	CCLOG("cocos2d: deallocing CCTextureCache.");

	CC_SAFE_RELEASE(m_pTextures);
	CC_SAFE_DELETE(m_pDictLock);
	CC_SAFE_DELETE(m_pContextLock);
}

void CCTextureCache::purgeSharedTextureCache()
{
	CC_SAFE_RELEASE_NULL(g_sharedTextureCache);
}


char * CCTextureCache::description()
{
	char *ret = new char[100];
	sprintf(ret, "<CCTextureCache | Number of textures = %u>", m_pTextures->count());
	return ret;
}


// TextureCache - Add Images
/* @todo EAGLContext
void CCTextureCache::addImageWithAsyncObject(CCAsyncObject* async)
{
	
	CCAutoreleasePool *autoreleasepool = [[CCAutoreleasePool alloc] init];

	// textures will be created on the main OpenGL context
	// it seems that in SDK 2.2.x there can't be 2 threads creating textures at the same time
	// the lock is used for this purpose: issue #472
	[contextLock lock];
	if( auxEAGLcontext == nil ) {
		auxEAGLcontext = [[EAGLContext alloc]
initWithAPI:kEAGLRenderingAPIOpenGLES1
sharegroup:[[[[CCDirector sharedDirector] openGLView] context] sharegroup]];

		if( ! auxEAGLcontext )
			CCLOG(@"cocos2d: TextureCache: Could not create EAGL context");
	}

	if( [EAGLContext setCurrentContext:auxEAGLcontext] ) {

		// load / create the texture
		CCTexture2D *tex = [self addImage:async.data];

		// The callback will be executed on the main thread
		[async.target performSelectorOnMainThread:async.selector withObject:tex waitUntilDone:NO];

		[EAGLContext setCurrentContext:nil];
	} else {
		CCLOG(@"cocos2d: TetureCache: EAGLContext error");
	}
	[contextLock unlock];

	[autoreleasepool release];
}*/

/* @todo selector, NSThread
void CCTextureCache::addImageAsync(const char* filename, CCObject *target, fpAsyncCallback func)
{
	CCAssert(filename != NULL , "TextureCache: fileimage MUST not be nill");

	// optimization

	CCTexture2D * tex;
 
 	if ( (tex = m_pTextures->objectForKey(filename)) )

 	{

 		target->

 	}

 	
 	if( (tex=[textures objectForKey: filename] ) ) {
 		[target performSelector:selector withObject:tex];
 		return;
 	}
 
 	// schedule the load
 
 	CCAsyncObject *asyncObject = [[CCAsyncObject alloc] init];
 	asyncObject.selector = selector;
 	asyncObject.target = target;
 	asyncObject.data = filename;
 
 	[NSThread detachNewThreadSelector:@selector(addImageWithAsyncObject:) toTarget:self withObject:asyncObject];
 	[asyncObject release];
}*/

CCTexture2D * CCTextureCache::addImage(const char * path)
{
	CCAssert(path != NULL, "TextureCache: fileimage MUST not be NULL");

	CCTexture2D * texture = NULL;
	// Split up directory and filename
	// MUTEX:
	// Needed since addImageAsync calls this method from a different thread
	
	m_pDictLock->lock();

	// remove possible -HD suffix to prevent caching the same image twice (issue #1040)
    std::string pathKey = path;
	CCFileUtils::ccRemoveHDSuffixFromFile(pathKey);

    pathKey = CCFileUtils::fullPathFromRelativePath(pathKey.c_str());
	texture = m_pTextures->objectForKey(pathKey);

    std::string fullpath = pathKey; // (CCFileUtils::fullPathFromRelativePath(path));
	if( ! texture ) 
	{
		std::string lowerCase(path);
		for (unsigned int i = 0; i < lowerCase.length(); ++i)
		{
			lowerCase[i] = tolower(lowerCase[i]);
		}
		// all images are handled by UIImage except PVR extension that is handled by our own handler
		// if ( [[path lowercaseString] hasSuffix:@".pvr"] )
		do 
		{
			if (std::string::npos != lowerCase.find(".pvr"))
			{
#ifdef _POWERVR_SUPPORT_
				texture = this->addPVRTCImage(fullpath.c_str());
#endif
			}
			// Issue #886: TEMPORARY FIX FOR TRANSPARENT JPEGS IN IOS4
			else if (std::string::npos != lowerCase.find(".jpg") || std::string::npos != lowerCase.find(".jpeg"))
			{
				CCImage * image = new CCImage();
                FileData data;
                unsigned long nSize  = 0;
                unsigned char* pBuffer = data.getFileData(fullpath.c_str(), "rb", &nSize);
                if(! image->initWithImageData((void*)pBuffer, nSize, CCImage::kFmtJpg))
				{
					delete image;
					break;
				}
				texture = new CCTexture2D();
				texture->initWithImage(image);
				CC_SAFE_DELETE(image);// image->release();

				if( texture )
				{
					m_pTextures->setObject(texture, pathKey);
					texture->release();
				}
				else
				{
					CCLOG("cocos2d: Couldn't add image:%s in CCTextureCache", path);
				}
			}
			else
			{
				//# work around for issue #910
#if 0
				UIImage *image = [UIImage imageNamed:path];
				tex = [ [CCTexture2D alloc] initWithImage: image ];
#else
				// prevents overloading the autorelease pool
				CCImage * image = new CCImage();
                FileData data;
                unsigned long nSize  = 0;
                unsigned char* pBuffer = data.getFileData(fullpath.c_str(), "rb", &nSize);
                if(! image->initWithImageData((void*)pBuffer, nSize, CCImage::kFmtPng))
				{
					delete image;
					break;
				}
				texture = new CCTexture2D();
				texture->initWithImage(image);
				CC_SAFE_DELETE(image);// image->release();
#endif
				if( texture )
				{
					m_pTextures->setObject(texture, pathKey);
					texture->release();
				}
				else
				{
					CCLOG("cocos2d: Couldn't add image:%s in CCTextureCache", path);
				}
			}

		} while (0);
	}
	m_pDictLock->unlock();
	return texture;
}

#ifdef _POWERVR_SUPPORT_
CCTexture2D* CCTextureCache::addPVRTCImage(const char* path, int bpp, bool hasAlpha, int width)
{
	
	CCAssert(path != NULL, "TextureCache: fileimage MUST not be nill");
	CCAssert( bpp==2 || bpp==4, "TextureCache: bpp must be either 2 or 4");

	CCTexture2D * texture;
	std::string temp(path);
	if ( (texture = m_pTextures->objectForKey(temp)) )
	{
		return texture;
	}
	
	// Split up directory and filename
	std::string fullpath( CCFileUtils::fullPathFromRelativePath(path) );

	CCData * data = CCData::dataWithContentsOfFile(fullpath);
	texture = new CCTexture2D();
	texture->initWithPVRTCData(data->bytes(), 0, bpp, hasAlpha, width);
	if( texture )
	{
		m_pTextures->setObject(texture, temp);
		texture->autorelease();
	}
	else
	{
		CCLOG("cocos2d: Couldn't add PVRTCImage:%s in CCTextureCache",path);
	}
	CC_SAFE_DELETE(data);

	return texture;
}

CCTexture2D * CCTextureCache::addPVRTCImage(const char* fileimage)
{
	CCAssert(fileimage != NULL, "TextureCache: fileimage MUST not be nill");

	CCTexture2D * texture;
	std::string key(fileimage);
	if( (texture = m_pTextures->objectForKey(key)) ) 
	{
		return texture;
	}

	texture = new CCTexture2D();
	texture = texture->initWithPVRTCFile(fileimage);
	if( texture )
	{
		m_pTextures-> setObject( texture, key);
		texture->autorelease();
	}
	else
	{
		CCLOG("cocos2d: Couldn't add PVRTCImage:%s in CCTextureCache",fileimage);
	}

	return texture;
}
#endif

/* @todo CGImageRef
-(CCTexture2D*) addCGImage: (CGImageRef) imageref forKey: (string & )key
{
	CCAssert(imageref != nil, @"TextureCache: image MUST not be nill");

	CCTexture2D * tex = nil;

	// If key is nil, then create a new texture each time
	if( key && (tex=[textures objectForKey: key] ) ) {
		return tex;
	}

	// prevents overloading the autorelease pool
	UIImage *image = [[UIImage alloc] initWithCGImage:imageref];
	tex = [[CCTexture2D alloc] initWithImage: image];
	[image release];

	if(tex && key)
		[textures setObject: tex forKey:key];
	else
		CCLOG(@"cocos2d: Couldn't add CGImage in CCTextureCache");

	return [tex autorelease];
}*/
CCTexture2D* CCTextureCache::addUIImage(CCImage *image, const char *key)
{
	CCAssert(image != NULL && key != NULL, "TextureCache: image MUST not be nill");

	CCTexture2D * texture = NULL;
	std::string forKey = key;

	m_pDictLock->lock();

	do 
	{
		// If key is nil, then create a new texture each time
		if(texture = m_pTextures->objectForKey(forKey))
		{
			break;
		}

		// prevents overloading the autorelease pool
		texture = new CCTexture2D();
		texture->initWithImage(image);

		if(texture)
		{
			m_pTextures->setObject(texture, forKey);
			texture->autorelease();
		}
		else
		{
			CCLOG("cocos2d: Couldn't add UIImage in CCTextureCache");
		}

	} while (0);
	
	m_pDictLock->unlock();

	return texture;
}

// TextureCache - Remove

void CCTextureCache::removeAllTextures()
{
	m_pTextures->removeAllObjects();
}

void CCTextureCache::removeUnusedTextures()
{
	std::vector<std::string> keys = m_pTextures->allKeys();
	std::vector<std::string>::iterator it;
	for (it = keys.begin(); it != keys.end(); it++)
	{
		CCTexture2D *value = m_pTextures->objectForKey(*it);
		if (value->retainCount() == 1)
		{
			CCLOG("cocos2d: CCTextureCache: removing unused texture: %s", (*it).c_str());
			m_pTextures->removeObjectForKey(*it);
		}
	}
}

void CCTextureCache::removeTexture(CCTexture2D* texture)
{
	if( ! texture )
		return;

	std::vector<std::string> keys = m_pTextures->allKeysForObject(texture);

	for (unsigned int i = 0; i < keys.size(); i++)
	{
		m_pTextures->removeObjectForKey(keys[i]);
	}
}

void CCTextureCache::removeTextureForKey(const char *textureKeyName)
{
	if (textureKeyName == NULL)
	{
		return;
	}

	m_pTextures->removeObjectForKey(string(textureKeyName));
}

CCTexture2D* CCTextureCache::textureForKey(const char* key)
{
	return m_pTextures->objectForKey(string(key));
}

}//namespace   cocos2d