axmol/cocos/2d/CCTileMapAtlas.cpp

/****************************************************************************
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2011      Zynga Inc.
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

http://www.cocos2d-x.org

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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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****************************************************************************/
#include "2d/CCTileMapAtlas.h"
#include "platform/CCFileUtils.h"
#include "renderer/CCTextureAtlas.h"
#include "base/TGAlib.h"
#include "base/CCDirector.h"
#include "base/ccUTF8.h"

NS_CC_BEGIN

// implementation TileMapAtlas

TileMapAtlas * TileMapAtlas::create(const std::string& tile, const std::string& mapFile, int tileWidth, int tileHeight)
{
    TileMapAtlas *ret = new (std::nothrow) TileMapAtlas();
    if (ret->initWithTileFile(tile, mapFile, tileWidth, tileHeight))
    {
        ret->autorelease();
        return ret;
    }
    CC_SAFE_DELETE(ret);
    return nullptr;
}

bool TileMapAtlas::initWithTileFile(const std::string& tile, const std::string& mapFile, int tileWidth, int tileHeight)
{
    this->loadTGAfile(mapFile);
    this->calculateItemsToRender();

    if( AtlasNode::initWithTileFile(tile, tileWidth, tileHeight, _itemsToRender) )
    {
        this->updateAtlasValues();
        this->setContentSize(Size((float)(_TGAInfo->width*_itemWidth),
                                        (float)(_TGAInfo->height*_itemHeight)));
        return true;
    }
    return false;
}

TileMapAtlas::TileMapAtlas()
 : _itemsToRender(0)
 , _TGAInfo(nullptr)
{
}

TileMapAtlas::~TileMapAtlas()
{
    if (_TGAInfo)
    {
        tgaDestroy(_TGAInfo);
    }
}

void TileMapAtlas::releaseMap()
{
    if (_TGAInfo)
    {
        tgaDestroy(_TGAInfo);
    }
    _TGAInfo = nullptr;
}

void TileMapAtlas::calculateItemsToRender()
{
    CCASSERT( _TGAInfo != nullptr, "tgaInfo must be non-nil");

    _itemsToRender = 0;
    for(int x=0;x < _TGAInfo->width; x++ ) 
    {
        for( int y=0; y < _TGAInfo->height; y++ ) 
        {
            Color3B *ptr = (Color3B*) _TGAInfo->imageData;
            Color3B value = ptr[x + y * _TGAInfo->width];
            if( value.r )
            {
                ++_itemsToRender;
            }
        }
    }
}

void TileMapAtlas::loadTGAfile(const std::string& file)
{
    std::string fullPath = FileUtils::getInstance()->fullPathForFilename(file);

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

    _TGAInfo = tgaLoad( fullPath.c_str() );
#if 1
    if( _TGAInfo->status != TGA_OK ) 
    {
        CCASSERT(0, "TileMapAtlasLoadTGA : TileMapAtlas cannot load TGA file");
    }
#endif
}

// TileMapAtlas - Atlas generation / updates
void TileMapAtlas::setTile(const Color3B& tile, const Vec2& position)
{
    CCASSERT(_TGAInfo != nullptr, "tgaInfo must not be nil");
    CCASSERT(position.x < _TGAInfo->width, "Invalid position.x");
    CCASSERT(position.y < _TGAInfo->height, "Invalid position.x");
    CCASSERT(tile.r != 0, "R component must be non 0");

    Color3B *ptr = (Color3B*)_TGAInfo->imageData;
    Color3B value = ptr[(unsigned int)(position.x + position.y * _TGAInfo->width)];
    if( value.r == 0 )
    {
        CCLOG("cocos2d: Value.r must be non 0.");
    } 
    else
    {
        ptr[(unsigned int)(position.x + position.y * _TGAInfo->width)] = tile;

        // FIXME:: this method consumes a lot of memory
        // FIXME:: a tree of something like that shall be implemented
        std::string key = StringUtils::toString(position.x) + "," + StringUtils::toString(position.y);
        int num = _posToAtlasIndex[key].asInt();

        this->updateAtlasValueAt(position, tile, num);
    }    
}

Color3B TileMapAtlas::getTileAt(const Vec2& position) const
{
    CCASSERT( _TGAInfo != nullptr, "tgaInfo must not be nil");
    CCASSERT( position.x < _TGAInfo->width, "Invalid position.x");
    CCASSERT( position.y < _TGAInfo->height, "Invalid position.y");

    Color3B *ptr = (Color3B*)_TGAInfo->imageData;
    Color3B value = ptr[(unsigned int)(position.x + position.y * _TGAInfo->width)];

    return value;    
}

void TileMapAtlas::updateAtlasValueAt(const Vec2& pos, const Color3B& value, int index)
{
    CCASSERT( index >= 0 && index < _textureAtlas->getCapacity(), "updateAtlasValueAt: Invalid index");

    V3F_C4B_T2F_Quad* quad = &((_textureAtlas->getQuads())[index]);

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

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

    float itemWidthInPixels = _itemWidth * CC_CONTENT_SCALE_FACTOR();
    float itemHeightInPixels = _itemHeight * 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 * _itemWidth);
    quad->bl.vertices.y = (float) (y * _itemHeight);
    quad->bl.vertices.z = 0.0f;
    quad->br.vertices.x = (float)(x * _itemWidth + _itemWidth);
    quad->br.vertices.y = (float)(y * _itemHeight);
    quad->br.vertices.z = 0.0f;
    quad->tl.vertices.x = (float)(x * _itemWidth);
    quad->tl.vertices.y = (float)(y * _itemHeight + _itemHeight);
    quad->tl.vertices.z = 0.0f;
    quad->tr.vertices.x = (float)(x * _itemWidth + _itemWidth);
    quad->tr.vertices.y = (float)(y * _itemHeight + _itemHeight);
    quad->tr.vertices.z = 0.0f;

    Color4B color(_displayedColor.r, _displayedColor.g, _displayedColor.b, _displayedOpacity);
    quad->tr.colors = color;
    quad->tl.colors = color;
    quad->br.colors = color;
    quad->bl.colors = color;

    _textureAtlas->setDirty(true);
    ssize_t totalQuads = _textureAtlas->getTotalQuads();
    if (index + 1 > totalQuads) {
        _textureAtlas->increaseTotalQuadsWith(index + 1 - totalQuads);
    }
}

void TileMapAtlas::updateAtlasValues()
{
    CCASSERT( _TGAInfo != nullptr, "tgaInfo must be non-nil");

    int total = 0;

    for(int x=0;x < _TGAInfo->width; x++ ) 
    {
        for( int y=0; y < _TGAInfo->height; y++ ) 
        {
            if( total < _itemsToRender ) 
            {
                Color3B *ptr = (Color3B*) _TGAInfo->imageData;
                Color3B value = ptr[x + y * _TGAInfo->width];

                if( value.r != 0 )
                {
                    this->updateAtlasValueAt(Vec2(x,y), value, total);

                    std::string key = StringUtils::toString(x) + "," + StringUtils::toString(y);
                    _posToAtlasIndex[key] = total;

                    total++;
                }
            }
        }
    }
}


NS_CC_END