axmol/cocos2dx/tilemap_parallax_nodes/CCTileMapAtlas.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2011      Zynga Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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all copies or substantial portions of the Software.

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****************************************************************************/
#include "CCTileMapAtlas.h"
#include "platform/CCFileUtils.h"
#include "textures/CCTextureAtlas.h"
#include "support/image_support/TGAlib.h"
#include "ccConfig.h"
#include "cocoa/CCDictionary.h"
#include "cocoa/CCInteger.h"
#include "CCDirector.h"

NS_CC_BEGIN

// implementation CCTileMapAtlas

CCTileMapAtlas * CCTileMapAtlas::create(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_tColor = ccWHITE;
        m_pPosToAtlasIndex = new CCDictionary();
        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);
    }
    CC_SAFE_RELEASE(m_pPosToAtlasIndex);
}

void CCTileMapAtlas::releaseMap()
{
    if (m_pTGAInfo)
    {
        tgaDestroy(m_pTGAInfo);
    }
    m_pTGAInfo = NULL;

    CC_SAFE_RELEASE_NULL(m_pPosToAtlasIndex);
}

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");

    const char* pPath = CCFileUtils::sharedFileUtils()->fullPathFromRelativePath(file);

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

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

// CCTileMapAtlas - Atlas generation / updates
void CCTileMapAtlas::setTile(const ccColor3B& tile, const 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 implemented
        CCInteger *num = (CCInteger*)m_pPosToAtlasIndex->objectForKey(CCString::createWithFormat("%ld,%ld", 
                                                                                                 (long)position.x, 
                                                                                                 (long)position.y)->getCString());
        this->updateAtlasValueAt(position, tile, num->getValue());
    }    
}

ccColor3B CCTileMapAtlas::tileAt(const 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(const ccGridSize& pos, const ccColor3B& value, unsigned 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());

    float itemWidthInPixels = m_uItemWidth * CC_CONTENT_SCALE_FACTOR();
    float itemHeightInPixels = m_uItemHeight * CC_CONTENT_SCALE_FACTOR();

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

    ccColor4B color = { m_tColor.r, m_tColor.g, m_tColor.b, m_cOpacity };
    quad.tr.colors = color;
    quad.tl.colors = color;
    quad.br.colors = color;
    quad.bl.colors = color;

    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);

                    CCString *key = CCString::createWithFormat("%d,%d", x,y);
                    CCInteger *num = CCInteger::create(total);
                    m_pPosToAtlasIndex->setObject(num, key->getCString());

                    total++;
                }
            }
        }
    }
}

void CCTileMapAtlas::setTGAInfo(struct sImageTGA* var)
{
    m_pTGAInfo = var;
}

struct sImageTGA * CCTileMapAtlas::getTGAInfo()
{
    return m_pTGAInfo;
}

NS_CC_END