axmol/cocos2dx/tileMap_parallax_nodes/CCTileMapAtlas.cpp

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Copyright (c) 2010-2011 cocos2d-x.org
Copyright (c) 2008-2010 Ricardo Quesada

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#include "CCTileMapAtlas.h"
#include "CCFileUtils.h"
#include "CCTextureAtlas.h"
#include "support/image_support/TGAlib.h"
#include "ccConfig.h"

namespace cocos2d {


	// implementation CCTileMapAtlas

	CCTileMapAtlas * CCTileMapAtlas::tileMapAtlasWithTileFile(const char *tile, const char *mapFile, int tileWidth, int tileHeight)
	{
		CCTileMapAtlas *pRet = new CCTileMapAtlas();
		if (pRet->initWithTileFile(tile, mapFile, tileWidth, tileHeight))
		{
			pRet->autorelease();
			return pRet;
		}
		CC_SAFE_DELETE(pRet);
		return NULL;
	}
	bool CCTileMapAtlas::initWithTileFile(const char *tile, const char *mapFile, int tileWidth, int tileHeight)
	{
		this->loadTGAfile(mapFile);
		this->calculateItemsToRender();
		if( CCAtlasNode::initWithTileFile(tile, tileWidth, tileHeight, m_nItemsToRender) )
		{
			m_pPosToAtlasIndex = new StringToIntegerDictionary();
			this->updateAtlasValues();
			this->setContentSize(CCSizeMake((float)(m_pTGAInfo->width*m_uItemWidth),
											(float)(m_pTGAInfo->height*m_uItemHeight)));
			return true;
		}
		return false;
	}
	CCTileMapAtlas::CCTileMapAtlas()
        :m_pTGAInfo(NULL)
		,m_pPosToAtlasIndex(NULL)
		,m_nItemsToRender(0)
	{
	}
	CCTileMapAtlas::~CCTileMapAtlas()
	{
		if (m_pTGAInfo)
		{
			tgaDestroy(m_pTGAInfo);
		}
		if (m_pPosToAtlasIndex)
		{
			m_pPosToAtlasIndex->clear();
			delete m_pPosToAtlasIndex;
			m_pPosToAtlasIndex = NULL;
		}
	}
	void CCTileMapAtlas::releaseMap()
	{
		if (m_pTGAInfo)
		{
			tgaDestroy(m_pTGAInfo);
		}
		m_pTGAInfo = NULL;

		if (m_pPosToAtlasIndex)
		{
			m_pPosToAtlasIndex->clear();
			delete m_pPosToAtlasIndex;
			m_pPosToAtlasIndex = NULL;
		}
	}
	void CCTileMapAtlas::calculateItemsToRender()
	{
		CCAssert( m_pTGAInfo != NULL, "tgaInfo must be non-nil");

		m_nItemsToRender = 0;
		for(int x=0;x < m_pTGAInfo->width; x++ ) 
		{
			for( int y=0; y < m_pTGAInfo->height; y++ ) 
			{
				ccColor3B *ptr = (ccColor3B*) m_pTGAInfo->imageData;
				ccColor3B value = ptr[x + y * m_pTGAInfo->width];
				if( value.r )
				{
					++m_nItemsToRender;
				}
			}
		}
	}
	void CCTileMapAtlas::loadTGAfile(const char *file)
	{
		CCAssert( file != NULL, "file must be non-nil");

		//	//Find the path of the file
		//	NSBundle *mainBndl = [CCDirector sharedDirector].loadingBundle;
		//	CCString *resourcePath = [mainBndl resourcePath];
		//	CCString * path = [resourcePath stringByAppendingPathComponent:file];

		m_pTGAInfo = tgaLoad( CCFileUtils::fullPathFromRelativePath(file) );
	#if 1
		if( m_pTGAInfo->status != TGA_OK ) 
		{
			CCAssert(0, "TileMapAtlasLoadTGA : TileMapAtas cannot load TGA file");
		}
	#endif
	}

	// CCTileMapAtlas - Atlas generation / updates
	void CCTileMapAtlas::setTile(ccColor3B tile, ccGridSize position)
	{
		CCAssert( m_pTGAInfo != NULL, "tgaInfo must not be nil");
		CCAssert( m_pPosToAtlasIndex != NULL, "posToAtlasIndex must not be nil");
		CCAssert( position.x < m_pTGAInfo->width, "Invalid position.x");
		CCAssert( position.y < m_pTGAInfo->height, "Invalid position.x");
		CCAssert( tile.r != 0, "R component must be non 0");

		ccColor3B *ptr = (ccColor3B*)m_pTGAInfo->imageData;
		ccColor3B value = ptr[position.x + position.y * m_pTGAInfo->width];
		if( value.r == 0 )
		{
			CCLOG("cocos2d: Value.r must be non 0.");
		} 
		else
		{
			ptr[position.x + position.y * m_pTGAInfo->width] = tile;

			// XXX: this method consumes a lot of memory
			// XXX: a tree of something like that shall be impolemented
			char buffer[32];
			/*std::string key = itoa(position.x, buffer, 10);*/
			sprintf(buffer, "%d", position.x);
			std::string key = buffer;
			
			key += ",";
			/*key += itoa(position.y, buffer, 10);*/
			sprintf(buffer, "%d", position.y);
			key += buffer;

			int num = m_pPosToAtlasIndex->find(key)->second;
			this->updateAtlasValueAt(position, tile, num);
		}	
	}
	ccColor3B CCTileMapAtlas::tileAt(ccGridSize position)
	{
		CCAssert( m_pTGAInfo != NULL, "tgaInfo must not be nil");
		CCAssert( position.x < m_pTGAInfo->width, "Invalid position.x");
		CCAssert( position.y < m_pTGAInfo->height, "Invalid position.y");

		ccColor3B *ptr = (ccColor3B*)m_pTGAInfo->imageData;
		ccColor3B value = ptr[position.x + position.y * m_pTGAInfo->width];

		return value;	
	}
	void CCTileMapAtlas::updateAtlasValueAt(ccGridSize pos, ccColor3B value, int index)
	{
		ccV3F_C4B_T2F_Quad quad;

		int x = pos.x;
		int y = pos.y;
        float row = (float) (value.r % m_uItemsPerRow);
        float col = (float) (value.r / m_uItemsPerRow);

        float textureWide = (float) (m_pTextureAtlas->getTexture()->getPixelsWide());
        float textureHigh = (float) (m_pTextureAtlas->getTexture()->getPixelsHigh());

#if CC_FIX_ARTIFACTS_BY_STRECHING_TEXEL
        float left		= (2 * row * m_uItemWidth + 1) / (2 * textureWide);
        float right		= left + (m_uItemWidth * 2 - 2) / (2 * textureWide);
        float top		= (2 * col * m_uItemHeight + 1) / (2 * textureHigh);
        float bottom	= top + (m_uItemHeight * 2 - 2) / (2 * textureHigh);
#else
        float left		= (row * m_uItemWidth) / textureWide;
        float right		= left + m_uItemWidth / textureWide;
        float top		= (col * m_uItemHeight) / textureHigh;
        float bottom	= top + m_uItemHeight / textureHigh;
#endif

        quad.tl.texCoords.u = left;
        quad.tl.texCoords.v = top;
        quad.tr.texCoords.u = right;
        quad.tr.texCoords.v = top;
        quad.bl.texCoords.u = left;
        quad.bl.texCoords.v = bottom;
        quad.br.texCoords.u = right;
        quad.br.texCoords.v = bottom;

		quad.bl.vertices.x = (float) (x * m_uItemWidth);
		quad.bl.vertices.y = (float) (y * m_uItemHeight);
		quad.bl.vertices.z = 0.0f;
		quad.br.vertices.x = (float)(x * m_uItemWidth + m_uItemWidth);
		quad.br.vertices.y = (float)(y * m_uItemHeight);
		quad.br.vertices.z = 0.0f;
		quad.tl.vertices.x = (float)(x * m_uItemWidth);
		quad.tl.vertices.y = (float)(y * m_uItemHeight + m_uItemHeight);
		quad.tl.vertices.z = 0.0f;
		quad.tr.vertices.x = (float)(x * m_uItemWidth + m_uItemWidth);
		quad.tr.vertices.y = (float)(y * m_uItemHeight + m_uItemHeight);
		quad.tr.vertices.z = 0.0f;

		m_pTextureAtlas->updateQuad(&quad, index);
	}
	void CCTileMapAtlas::updateAtlasValues()
	{
		CCAssert( m_pTGAInfo != NULL, "tgaInfo must be non-nil");

		int total = 0;

		for(int x=0;x < m_pTGAInfo->width; x++ ) 
		{
			for( int y=0; y < m_pTGAInfo->height; y++ ) 
			{
				if( total < m_nItemsToRender ) 
				{
					ccColor3B *ptr = (ccColor3B*) m_pTGAInfo->imageData;
					ccColor3B value = ptr[x + y * m_pTGAInfo->width];

					if( value.r != 0 )
					{
						this->updateAtlasValueAt(ccg(x,y), value, total);

						char buffer[32];
						/*std::string key = itoa(x, buffer, 10);*/
						sprintf(buffer, "%d", x);
						std::string key = buffer;

						key += ",";
						/*key += itoa(y, buffer, 10);*/
						sprintf(buffer, "%d", y);
						key += buffer;

						m_pPosToAtlasIndex->insert(StringToIntegerPair(key, total));

						total++;
					}
				}
			}
		}
	}
	void CCTileMapAtlas::setTGAInfo(struct sImageTGA* var)
	{
		m_pTGAInfo = var;
	}
	struct sImageTGA * CCTileMapAtlas::getTGAInfo()
	{
		return m_pTGAInfo;
	}

} // namespace cocos2d