Cocos2D-X Resources Management

Cocos2D-X provides a class to help you easily manage your Resources – CCFileUtils

Resources Search Path

You can add additional folders to your default search path.This is helpful to select resources according to device resolution.


vector<string> searchPath;

searchPath.push_back("hd"); 
searchPath.push_back("sd");

//when looking for resources will search hd and sd folders
CCFileUtils::sharedFileUtils()->setSearchPaths(searchPath);

//example
CCSprite sprite = CCSprite::create("Player.png"); //can be either in hd,sd or under Resources

vector<string> searchPath;

searchPath.push_back("hd");

searchPath.push_back("sd");

//when looking for resources will search hd and sd folders

CCFileUtils::sharedFileUtils()->setSearchPaths(searchPath);

//example

CCSprite sprite = CCSprite::create("Player.png"); //can be either in hd,sd or under Resources

Read contents from File


string fullPath = CCFileUtils::sharedFileUtils()->fullPathForFilename("content.txt");

unsigned char* fileContent = NULL;

unsigned long bufferSize = 0;

fileContent = CCFileUtils::sharedFileUtils()->getFileData(fullPath.c_str(), "r", &bufferSize);

string fullPath = CCFileUtils::sharedFileUtils()->fullPathForFilename("content.txt");

unsigned char* fileContent = NULL;

unsigned long bufferSize = 0;

fileContent = CCFileUtils::sharedFileUtils()->getFileData(fullPath.c_str(), "r", &bufferSize);

Custom TTF Fonts

Note: for some reason in an Android project I have to put the ttf fonts under fonts folder or they wont be found.


CCLabelTTF *item1Text =  CCLabelTTF::create("Info", "atarist.ttf", 10.0*scaleFactor, CCSizeMake(200*scaleFactor,40*scaleFactor), kCCTextAlignmentLeft);

//if specifying only font name doesen't work add fonts to path,
//create fonts folder under resources if not already there
CCLabelTTF *item1Text =  CCLabelTTF::create("Info", "fonts/atarist.ttf", 10.0*scaleFactor, CCSizeMake(200*scaleFactor,40*scaleFactor), kCCTextAlignmentLeft);

CCLabelTTF *item1Text = CCLabelTTF::create("Info", "atarist.ttf", 10.0*scaleFactor, CCSizeMake(200*scaleFactor,40*scaleFactor), kCCTextAlignmentLeft);

//if specifying only font name doesen't work add fonts to path,

//create fonts folder under resources if not already there

CCLabelTTF *item1Text = CCLabelTTF::create("Info", "fonts/atarist.ttf", 10.0*scaleFactor, CCSizeMake(200*scaleFactor,40*scaleFactor), kCCTextAlignmentLeft);

Parse Xml with TinyXml2

Here is a complete example with reading contents of a file(xml) and parsing it
All the siblings of first element are being iterated
You can actually paste it into a method


//dont forget #include "support/tinyxml2/tinyxml2.h"

	string fullPath = CCFileUtils::sharedFileUtils()->getWritablePath() + "test.xml";
	unsigned long bufferSize = 0;
	unsigned char *fileContent = CCFileUtils::sharedFileUtils()->getFileData(fullPath.c_str(), "r", &bufferSize);

	if(bufferSize == 0){
		CCLOG("debug cannot read from file %", fullPath.c_str());
		return;
	}

	string content;
	content.append(reinterpret_cast<const char*>(fileContent));

	XMLDocument tinyDoc;
	tinyDoc.Parse(content.c_str());
	XMLElement *firstChild = tinyDoc.FirstChildElement()->FirstChildElement();; // root->firstChild
	while(firstChild != 0){

		const XMLAttribute *att =  firstChild->FirstAttribute();
		const XMLAttribute *att2 = att->Next(); //next attribute

		const char *content = firstChild->GetText();

		if(firstChild->NextSibling() == NULL){
			break;
		}else {
			firstChild = firstChild->NextSibling()->ToElement();
		}
	}

//dont forget #include "support/tinyxml2/tinyxml2.h"

string fullPath = CCFileUtils::sharedFileUtils()->getWritablePath() + "test.xml";

unsigned long bufferSize = 0;

unsigned char *fileContent = CCFileUtils::sharedFileUtils()->getFileData(fullPath.c_str(), "r", &bufferSize);

if(bufferSize == 0){

CCLOG("debug cannot read from file %", fullPath.c_str());

return;

}

string content;

content.append(reinterpret_cast<const char*>(fileContent));

XMLDocument tinyDoc;

tinyDoc.Parse(content.c_str());

XMLElement *firstChild = tinyDoc.FirstChildElement()->FirstChildElement();; // root->firstChild

while(firstChild != 0){

const XMLAttribute *att = firstChild->FirstAttribute();

const XMLAttribute *att2 = att->Next(); //next attribute

const char *content = firstChild->GetText();

if(firstChild->NextSibling() == NULL){

break;

}else {

firstChild = firstChild->NextSibling()->ToElement();

}

Extract files from zip

This is actually an example from stackoverflow someone had post
Unfortunately I lost my bookmarks after reinstalling my linux, otherwise I would post the link
You can actually paste it into a method


// dont forget #include "support/zip_support/unzip.h"

string pathName =  CCFileUtils::sharedFileUtils()->getWritablePath() + "filename.zip";

	unzFile zipfile = unzOpen(pathName.c_str());


	if ( zipfile == NULL )
	{
		printf( "%s: not foundn" ,pathName.c_str());
		return;
	}

	// Get info about the zip file
	unz_global_info global_info;
	if ( unzGetGlobalInfo( zipfile, &global_info ) != UNZ_OK )
	{
		printf( "could not read file global infon" );
		unzClose( zipfile );
		return;
	}

	// Loop to extract all files
	uLong i;
	for ( i = 0; i < global_info.number_entry; ++i )
	{
		// Get info about current file.
		unz_file_info file_info;
		char filename[ 100 ];
		if ( unzGetCurrentFileInfo(
				zipfile,
				&file_info,
				filename,
				100,
				NULL, 0, NULL, 0 ) != UNZ_OK )
		{
			CCLog( "could not read file infon" );
			unzClose( zipfile );
			return;
		}

		// Buffer to hold data read from the zip file.
		char read_buffer[ READ_SIZE ];

		string str(filename);

		//if(str.find(".png") != string::npos || str.find(".gif") != string::npos){

		CCLog("debug extracting file %s",filename );
		// Check if this entry is a directory or file.
		const size_t filename_length = strlen( filename );
		if ( filename[ filename_length-1 ] == dir_delimter )
		{
			// Entry is a directory, so create it.
			printf( "dir:%sn", filename );

		}
		else
		{
			// Entry is a file, so extract it.
			CCLog( "file:%sn", filename );
			if ( unzOpenCurrentFile( zipfile ) != UNZ_OK )
			{
				CCLog( "could not open filen" );
				unzClose( zipfile );
				return ;
			}

			// Open a file to write out the data.
			string filepath = CCFileUtils::sharedFileUtils()->getWritablePath() + packageID + "_" + filename;
			CCLog("%s",filepath.c_str());
			FILE *out = fopen( filepath.c_str(), "wb" );
			if ( out == NULL )
			{
				CCLog( "could not open destination filen" );
				//unzCloseCurrentFile( zipfile );
				//unzClose( zipfile );
				//return;
			}
			else
			{

				int error = UNZ_OK;
				do
				{
					error = unzReadCurrentFile( zipfile, read_buffer, READ_SIZE );
					if ( error < 0 )
					{
						printf( "error %dn", error );
						unzCloseCurrentFile( zipfile );
						unzClose( zipfile );
						return;
					}

					// Write data to file.
					if ( error > 0 )
					{
						int dbuf = fwrite( read_buffer, error, 1, out ); // You should check return of fwrite...
						CCLog("debug bytes written %d %s",dbuf,filename);
					}
				} while ( error > 0 );

				fclose( out );
			}
		}

		unzCloseCurrentFile( zipfile );


		// Go the the next entry listed in the zip file.
		if ( ( i+1 ) < global_info.number_entry )
		{
			if ( unzGoToNextFile( zipfile ) != UNZ_OK )
			{
				printf( "cound not read next filen" );
				unzClose( zipfile );
				return;
			}
		}

	}

	unzClose( zipfile );

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

// dont forget #include "support/zip_support/unzip.h"

string pathName = CCFileUtils::sharedFileUtils()->getWritablePath() + "filename.zip";

unzFile zipfile = unzOpen(pathName.c_str());

if ( zipfile == NULL )

{

printf( "%s: not foundn" ,pathName.c_str());

return;

}

// Get info about the zip file

unz_global_info global_info;

if ( unzGetGlobalInfo( zipfile, &global_info ) != UNZ_OK )

{

printf( "could not read file global infon" );

unzClose( zipfile );

return;

}

// Loop to extract all files

uLong i;

for ( i = 0; i < global_info.number_entry; ++i )

{

// Get info about current file.

unz_file_info file_info;

char filename[ 100 ];

if ( unzGetCurrentFileInfo(

zipfile,

&file_info,

filename,

100,

NULL, 0, NULL, 0 ) != UNZ_OK )

{

CCLog( "could not read file infon" );

unzClose( zipfile );

return;

}

// Buffer to hold data read from the zip file.

char read_buffer[ READ_SIZE ];

string str(filename);

//if(str.find(".png") != string::npos || str.find(".gif") != string::npos){

CCLog("debug extracting file %s",filename );

// Check if this entry is a directory or file.

const size_t filename_length = strlen( filename );

if ( filename[ filename_length-1 ] == dir_delimter )

{

// Entry is a directory, so create it.

printf( "dir:%sn", filename );

}

else

{

// Entry is a file, so extract it.

CCLog( "file:%sn", filename );

if ( unzOpenCurrentFile( zipfile ) != UNZ_OK )

{

CCLog( "could not open filen" );

unzClose( zipfile );

return ;

}

// Open a file to write out the data.

string filepath = CCFileUtils::sharedFileUtils()->getWritablePath() + packageID + "_" + filename;

CCLog("%s",filepath.c_str());

FILE *out = fopen( filepath.c_str(), "wb" );

if ( out == NULL )

{

CCLog( "could not open destination filen" );

//unzCloseCurrentFile( zipfile );

//unzClose( zipfile );

//return;

}

else

{

int error = UNZ_OK;

{

error = unzReadCurrentFile( zipfile, read_buffer, READ_SIZE );

if ( error < 0 )

{

printf( "error %dn", error );

unzCloseCurrentFile( zipfile );

unzClose( zipfile );

return;

}

// Write data to file.

if ( error > 0 )

{

int dbuf = fwrite( read_buffer, error, 1, out ); // You should check return of fwrite...

CCLog("debug bytes written %d %s",dbuf,filename);

}

} while ( error > 0 );

fclose( out );

}

unzCloseCurrentFile( zipfile );

// Go the the next entry listed in the zip file.

if ( ( i+1 ) < global_info.number_entry )

{

if ( unzGoToNextFile( zipfile ) != UNZ_OK )

{

printf( "cound not read next filen" );

unzClose( zipfile );

return;

}

unzClose( zipfile );

Download File

Be sure to add/configure certificates for android, because https wont work out of the box


void PackageData::downloadPackage()
{
	cocos2d::extension::CCHttpRequest* request = new cocos2d::extension::CCHttpRequest();
	CCLog("Starting download ...");
	request->setUrl("http://example.com/path/myfile.zip");

	request->setRequestType(cocos2d::extension::CCHttpRequest::kHttpGet);
	
	request->setResponseCallback(this, callfuncND_selector(PackageData::onHttpRequestCompleted));
	request->setTag("GET download");

	cocos2d::extension::CCHttpClient::getInstance()->send(request);
	request->release();

}

void PackageData::onHttpRequestCompleted(cocos2d::extension::CCHttpClient *sender, cocos2d::extension::CCHttpResponse *response)
{

	if (!response)
	{
		return;
	}

	// You can get original request type from: response->request->reqType
	if (0 != strlen(response->getHttpRequest()->getTag()))
	{
		CCLog("debug %s completed", response->getHttpRequest()->getTag());
	}

	int statusCode = response->getResponseCode();
	char statusString[64] = {};
	CCLog(statusString, "HTTP Status Code: %d, tag = %s", statusCode, response->getHttpRequest()->getTag());

	CCLog("debug response code: %d", statusCode);

	if (!response->isSucceed())
	{
		CCLog("response failed");
		CCLog("error buffer: %s", response->getErrorBuffer());
		return;
	}

	// dump data
	vector<char> *responseData = response->getResponseData();

	CCLog("debug Http Test, dump data: %d",responseData->size() );

	string filePath = CCFileUtils::sharedFileUtils()->getWritablePath();
	string fileName = "myfile.zip";
	string pathName = filePath.c_str() + fileName;

	CCLog("debug filename %s",pathName.c_str());

	FILE *fp = fopen(pathName.c_str(), "wb");

	if (!fp) {
		CCLOG("debug can not create file %s", pathName.c_str());
		return;
	}

	CCLog("debug written bytes %d",fwrite(responseData->data(), 1, responseData->size(), fp));

	fclose(fp);


}

void PackageData::downloadPackage()

{

cocos2d::extension::CCHttpRequest* request = new cocos2d::extension::CCHttpRequest();

CCLog("Starting download ...");

request->setUrl("http://example.com/path/myfile.zip");

request->setRequestType(cocos2d::extension::CCHttpRequest::kHttpGet);

request->setResponseCallback(this, callfuncND_selector(PackageData::onHttpRequestCompleted));

request->setTag("GET download");

cocos2d::extension::CCHttpClient::getInstance()->send(request);

request->release();

}

void PackageData::onHttpRequestCompleted(cocos2d::extension::CCHttpClient *sender, cocos2d::extension::CCHttpResponse *response)

{

if (!response)

{

return;

}

// You can get original request type from: response->request->reqType

if (0 != strlen(response->getHttpRequest()->getTag()))

{

CCLog("debug %s completed", response->getHttpRequest()->getTag());

}

int statusCode = response->getResponseCode();

char statusString[64] = {};

CCLog(statusString, "HTTP Status Code: %d, tag = %s", statusCode, response->getHttpRequest()->getTag());

CCLog("debug response code: %d", statusCode);

if (!response->isSucceed())

{

CCLog("response failed");

CCLog("error buffer: %s", response->getErrorBuffer());

return;

}

// dump data

vector<char> *responseData = response->getResponseData();

CCLog("debug Http Test, dump data: %d",responseData->size() );

string filePath = CCFileUtils::sharedFileUtils()->getWritablePath();

string fileName = "myfile.zip";

string pathName = filePath.c_str() + fileName;

CCLog("debug filename %s",pathName.c_str());

FILE *fp = fopen(pathName.c_str(), "wb");

if (!fp) {

CCLOG("debug can not create file %s", pathName.c_str());

return;

}

CCLog("debug written bytes %d",fwrite(responseData->data(), 1, responseData->size(), fp));

fclose(fp);

}

This entry was posted in Cocos2D-X and tagged cocos2dx,manage resources,read text file on April 15, 2013