axmol/cocos2dx/effects/CCGrid.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2009      On-Core

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "ccMacros.h"
#include "effects/CCGrid.h"
#include "CCDirector.h"
#include "effects/CCGrabber.h"
#include "support/ccUtils.h"
#include "shaders/CCGLProgram.h"
#include "shaders/CCShaderCache.h"
#include "shaders/ccGLStateCache.h"
#include "CCGL.h"
#include "support/CCPointExtension.h"
#include "support/TransformUtils.h"
#include "kazmath/kazmath.h"
#include "kazmath/GL/matrix.h"

NS_CC_BEGIN
// implementation of CCGridBase

CCGridBase* CCGridBase::create(const CCSize& gridSize)
{
    CCGridBase *pGridBase = new CCGridBase();

    if (pGridBase)
    {
        if (pGridBase->initWithSize(gridSize))
        {
            pGridBase->autorelease();
        }
        else
        {
            CC_SAFE_RELEASE_NULL(pGridBase);
        }
    }

    return pGridBase;
}

CCGridBase* CCGridBase::create(const CCSize& gridSize, CCTexture2D *texture, bool flipped)
{
    CCGridBase *pGridBase = new CCGridBase();

    if (pGridBase)
    {
        if (pGridBase->initWithSize(gridSize, texture, flipped))
        {
            pGridBase->autorelease();
        }
        else
        {
            CC_SAFE_RELEASE_NULL(pGridBase);
        }
    }

    return pGridBase;
}

bool CCGridBase::initWithSize(const CCSize& gridSize, CCTexture2D *pTexture, bool bFlipped)
{
    bool bRet = true;

    m_bActive = false;
    m_nReuseGrid = 0;
    m_sGridSize = gridSize;

    m_pTexture = pTexture;
    CC_SAFE_RETAIN(m_pTexture);
    m_bIsTextureFlipped = bFlipped;

    CCSize texSize = m_pTexture->getContentSize();
    m_obStep.x = texSize.width / m_sGridSize.width;
    m_obStep.y = texSize.height / m_sGridSize.height;

    m_pGrabber = new CCGrabber();
    if (m_pGrabber)
    {
        m_pGrabber->grab(m_pTexture);
    }
    else
    {
        bRet = false;
    }
    
    m_pShaderProgram = CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTexture);
    calculateVertexPoints();

    return bRet;
}

bool CCGridBase::initWithSize(const CCSize& gridSize)
{
    CCDirector *pDirector = CCDirector::sharedDirector();
    CCSize s = pDirector->getWinSizeInPixels();
    
    unsigned long POTWide = ccNextPOT((unsigned int)s.width);
    unsigned long POTHigh = ccNextPOT((unsigned int)s.height);

    // we only use rgba8888
    CCTexture2DPixelFormat format = kCCTexture2DPixelFormat_RGBA8888;

    void *data = calloc((int)(POTWide * POTHigh * 4), 1);
    if (! data)
    {
        CCLOG("cocos2d: CCGrid: not enough memory.");
        this->release();
        return false;
    }

    CCTexture2D *pTexture = new CCTexture2D();
    pTexture->initWithData(data, format, POTWide, POTHigh, s);

    free(data);

    if (! pTexture)
    {
        CCLOG("cocos2d: CCGrid: error creating texture");
        return false;
    }

    initWithSize(gridSize, pTexture, false);

    pTexture->release();

    return true;
}

CCGridBase::~CCGridBase(void)
{
    CCLOGINFO("cocos2d: deallocing %p", this);

//TODO: ? why 2.0 comments this line        setActive(false);
    CC_SAFE_RELEASE(m_pTexture);
    CC_SAFE_RELEASE(m_pGrabber);
}

// properties
void CCGridBase::setActive(bool bActive)
{
    m_bActive = bActive;
    if (! bActive)
    {
        CCDirector *pDirector = CCDirector::sharedDirector();
        ccDirectorProjection proj = pDirector->getProjection();
        pDirector->setProjection(proj);
    }
}

void CCGridBase::setTextureFlipped(bool bFlipped)
{
    if (m_bIsTextureFlipped != bFlipped)
    {
        m_bIsTextureFlipped = bFlipped;
        calculateVertexPoints();
    }
}

void CCGridBase::set2DProjection()
{
    CCDirector *director = CCDirector::sharedDirector();

    CCSize    size = director->getWinSizeInPixels();

    glViewport(0, 0, (GLsizei)(size.width * CC_CONTENT_SCALE_FACTOR()), (GLsizei)(size.height * CC_CONTENT_SCALE_FACTOR()) );
    kmGLMatrixMode(KM_GL_PROJECTION);
    kmGLLoadIdentity();

    kmMat4 orthoMatrix;
    kmMat4OrthographicProjection(&orthoMatrix, 0, size.width * CC_CONTENT_SCALE_FACTOR(), 0, size.height * CC_CONTENT_SCALE_FACTOR(), -1, 1);
    kmGLMultMatrix( &orthoMatrix );

    kmGLMatrixMode(KM_GL_MODELVIEW);
    kmGLLoadIdentity();


    ccSetProjectionMatrixDirty();
}

void CCGridBase::beforeDraw(void)
{
    // save projection
    CCDirector *director = CCDirector::sharedDirector();
    m_directorProjection = director->getProjection();

    // 2d projection
    //    [director setProjection:kCCDirectorProjection2D];
    set2DProjection();
    m_pGrabber->beforeRender(m_pTexture);
}

void CCGridBase::afterDraw(cocos2d::CCNode *pTarget)
{
    m_pGrabber->afterRender(m_pTexture);

    // restore projection
    CCDirector *director = CCDirector::sharedDirector();
    director->setProjection(m_directorProjection);

    if (pTarget->getCamera()->isDirty())
    {
        CCPoint offset = pTarget->getAnchorPointInPoints();

        //
        // XXX: Camera should be applied in the AnchorPoint
        //
        kmGLTranslatef(offset.x, offset.y, 0);
        pTarget->getCamera()->locate();
        kmGLTranslatef(-offset.x, -offset.y, 0);
    }

    ccGLBindTexture2D(m_pTexture->getName());

    // restore projection for default FBO .fixed bug #543 #544
//TODO:         CCDirector::sharedDirector()->setProjection(CCDirector::sharedDirector()->getProjection());
//TODO:         CCDirector::sharedDirector()->applyOrientation();
    blit();
}

void CCGridBase::blit(void)
{
    CCAssert(0, "");
}

void CCGridBase::reuse(void)
{
    CCAssert(0, "");
}

void CCGridBase::calculateVertexPoints(void)
{
    CCAssert(0, "");
}

// implementation of CCGrid3D

CCGrid3D* CCGrid3D::create(const CCSize& gridSize, CCTexture2D *pTexture, bool bFlipped)
{
    CCGrid3D *pRet= new CCGrid3D();

    if (pRet)
    {
        if (pRet->initWithSize(gridSize, pTexture, bFlipped))
        {
            pRet->autorelease();
        }
        else
        {
            delete pRet;
            pRet = NULL;
        }
    }

    return pRet;
}

CCGrid3D* CCGrid3D::create(const CCSize& gridSize)
{
    CCGrid3D *pRet= new CCGrid3D();

    if (pRet)
    {
        if (pRet->initWithSize(gridSize))
        {
            pRet->autorelease();
        }
        else
        {
            delete pRet;
            pRet = NULL;
        }
    }

    return pRet;
}


CCGrid3D::CCGrid3D()
    : m_pTexCoordinates(NULL)
    , m_pVertices(NULL)
    , m_pOriginalVertices(NULL)
    , m_pIndices(NULL)
{

}

CCGrid3D::~CCGrid3D(void)
{
    CC_SAFE_FREE(m_pTexCoordinates);
    CC_SAFE_FREE(m_pVertices);
    CC_SAFE_FREE(m_pIndices);
    CC_SAFE_FREE(m_pOriginalVertices);
}

void CCGrid3D::blit(void)
{
    int n = m_sGridSize.width * m_sGridSize.height;

    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position | kCCVertexAttribFlag_TexCoords );
    m_pShaderProgram->use();
    m_pShaderProgram->setUniformsForBuiltins();;

    //
    // Attributes
    //

    // position
    glVertexAttribPointer(kCCVertexAttrib_Position, 3, GL_FLOAT, GL_FALSE, 0, m_pVertices);

    // texCoords
    glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, 0, m_pTexCoordinates);

    glDrawElements(GL_TRIANGLES, (GLsizei) n*6, GL_UNSIGNED_SHORT, m_pIndices);
    CC_INCREMENT_GL_DRAWS(1);
}

void CCGrid3D::calculateVertexPoints(void)
{
    float width = (float)m_pTexture->getPixelsWide();
    float height = (float)m_pTexture->getPixelsHigh();
    float imageH = m_pTexture->getContentSizeInPixels().height;

    int x, y, i;
    CC_SAFE_FREE(m_pVertices);
    CC_SAFE_FREE(m_pOriginalVertices);
    CC_SAFE_FREE(m_pTexCoordinates);
    CC_SAFE_FREE(m_pIndices);

    unsigned int numOfPoints = (m_sGridSize.width+1) * (m_sGridSize.height+1);

    m_pVertices = malloc(numOfPoints * sizeof(ccVertex3F));
    m_pOriginalVertices = malloc(numOfPoints * sizeof(ccVertex3F));
    m_pTexCoordinates = malloc(numOfPoints * sizeof(ccVertex2F));
    m_pIndices = (GLushort*)malloc(m_sGridSize.width * m_sGridSize.height * sizeof(GLushort) * 6);

    GLfloat *vertArray = (GLfloat*)m_pVertices;
    GLfloat *texArray = (GLfloat*)m_pTexCoordinates;
    GLushort *idxArray = m_pIndices;

    for (x = 0; x < m_sGridSize.width; ++x)
    {
        for (y = 0; y < m_sGridSize.height; ++y)
        {
            int idx = (y * m_sGridSize.width) + x;

            GLfloat x1 = x * m_obStep.x;
            GLfloat x2 = x1 + m_obStep.x;
            GLfloat y1 = y * m_obStep.y;
            GLfloat y2= y1 + m_obStep.y;

            GLushort a = (GLushort)(x * (m_sGridSize.height + 1) + y);
            GLushort b = (GLushort)((x + 1) * (m_sGridSize.height + 1) + y);
            GLushort c = (GLushort)((x + 1) * (m_sGridSize.height + 1) + (y + 1));
            GLushort d = (GLushort)(x * (m_sGridSize.height + 1) + (y + 1));

            GLushort tempidx[6] = {a, b, d, b, c, d};

            memcpy(&idxArray[6*idx], tempidx, 6*sizeof(GLushort));

            int l1[4] = {a*3, b*3, c*3, d*3};
            ccVertex3F e = {x1, y1, 0};
            ccVertex3F f = {x2, y1, 0};
            ccVertex3F g = {x2, y2, 0};
            ccVertex3F h = {x1, y2, 0};

            ccVertex3F l2[4] = {e, f, g, h};

            int tex1[4] = {a*2, b*2, c*2, d*2};
            CCPoint tex2[4] = {ccp(x1, y1), ccp(x2, y1), ccp(x2, y2), ccp(x1, y2)};

            for (i = 0; i < 4; ++i)
            {
                vertArray[l1[i]] = l2[i].x;
                vertArray[l1[i] + 1] = l2[i].y;
                vertArray[l1[i] + 2] = l2[i].z;

                texArray[tex1[i]] = tex2[i].x / width;
                if (m_bIsTextureFlipped)
                {
                    texArray[tex1[i] + 1] = (imageH - tex2[i].y) / height;
                }
                else
                {
                    texArray[tex1[i] + 1] = tex2[i].y / height;
                }
            }
        }
    }

    memcpy(m_pOriginalVertices, m_pVertices, (m_sGridSize.width+1) * (m_sGridSize.height+1) * sizeof(ccVertex3F));
}

ccVertex3F CCGrid3D::vertex(const CCPoint& pos)
{
    CCAssert( pos.x == (unsigned int)pos.x && pos.y == (unsigned int) pos.y , "Numbers must be integers");
    
    int index = (pos.x * (m_sGridSize.height+1) + pos.y) * 3;
    float *vertArray = (float*)m_pVertices;

    ccVertex3F vert = {vertArray[index], vertArray[index+1], vertArray[index+2]};

    return vert;
}

ccVertex3F CCGrid3D::originalVertex(const CCPoint& pos)
{
    CCAssert( pos.x == (unsigned int)pos.x && pos.y == (unsigned int) pos.y , "Numbers must be integers");
    
    int index = (pos.x * (m_sGridSize.height+1) + pos.y) * 3;
    float *vertArray = (float*)m_pOriginalVertices;

    ccVertex3F vert = {vertArray[index], vertArray[index+1], vertArray[index+2]};

    return vert;
}

void CCGrid3D::setVertex(const CCPoint& pos, const ccVertex3F& vertex)
{
    CCAssert( pos.x == (unsigned int)pos.x && pos.y == (unsigned int) pos.y , "Numbers must be integers");
    int index = (pos.x * (m_sGridSize.height + 1) + pos.y) * 3;
    float *vertArray = (float*)m_pVertices;
    vertArray[index] = vertex.x;
    vertArray[index+1] = vertex.y;
    vertArray[index+2] = vertex.z;
}

void CCGrid3D::reuse(void)
{
    if (m_nReuseGrid > 0)
    {
        memcpy(m_pOriginalVertices, m_pVertices, (m_sGridSize.width+1) * (m_sGridSize.height+1) * sizeof(ccVertex3F));
        --m_nReuseGrid;
    }
}

// implementation of CCTiledGrid3D

CCTiledGrid3D::CCTiledGrid3D()
    : m_pTexCoordinates(NULL)
    , m_pVertices(NULL)
    , m_pOriginalVertices(NULL)
    , m_pIndices(NULL)
{

}

CCTiledGrid3D::~CCTiledGrid3D(void)
{
    CC_SAFE_FREE(m_pTexCoordinates);
    CC_SAFE_FREE(m_pVertices);
    CC_SAFE_FREE(m_pOriginalVertices);
    CC_SAFE_FREE(m_pIndices);
}

CCTiledGrid3D* CCTiledGrid3D::create(const CCSize& gridSize, CCTexture2D *pTexture, bool bFlipped)
{
    CCTiledGrid3D *pRet= new CCTiledGrid3D();

    if (pRet)
    {
        if (pRet->initWithSize(gridSize, pTexture, bFlipped))
        {
            pRet->autorelease();
        }
        else
        {
            delete pRet;
            pRet = NULL;
        }
    }

    return pRet;
}

CCTiledGrid3D* CCTiledGrid3D::create(const CCSize& gridSize)
{
    CCTiledGrid3D *pRet= new CCTiledGrid3D();

    if (pRet)
    {
        if (pRet->initWithSize(gridSize))
        {
            pRet->autorelease();
        }
        else
        {
            delete pRet;
            pRet = NULL;
        }
    }

    return pRet;
}

void CCTiledGrid3D::blit(void)
{
    int n = m_sGridSize.width * m_sGridSize.height;

    
    m_pShaderProgram->use();
    m_pShaderProgram->setUniformsForBuiltins();

    //
    // Attributes
    //
    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position | kCCVertexAttribFlag_TexCoords );
    // position
    glVertexAttribPointer(kCCVertexAttrib_Position, 3, GL_FLOAT, GL_FALSE, 0, m_pVertices);

    // texCoords
    glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, 0, m_pTexCoordinates);

    glDrawElements(GL_TRIANGLES, (GLsizei)n*6, GL_UNSIGNED_SHORT, m_pIndices);

    CC_INCREMENT_GL_DRAWS(1);
}

void CCTiledGrid3D::calculateVertexPoints(void)
{
    float width = (float)m_pTexture->getPixelsWide();
    float height = (float)m_pTexture->getPixelsHigh();
    float imageH = m_pTexture->getContentSizeInPixels().height;
    
    int numQuads = m_sGridSize.width * m_sGridSize.height;
    CC_SAFE_FREE(m_pVertices);
    CC_SAFE_FREE(m_pOriginalVertices);
    CC_SAFE_FREE(m_pTexCoordinates);
    CC_SAFE_FREE(m_pIndices);

    m_pVertices = malloc(numQuads*4*sizeof(ccVertex3F));
    m_pOriginalVertices = malloc(numQuads*4*sizeof(ccVertex3F));
    m_pTexCoordinates = malloc(numQuads*4*sizeof(ccVertex2F));
    m_pIndices = (GLushort*)malloc(numQuads*6*sizeof(GLushort));

    GLfloat *vertArray = (GLfloat*)m_pVertices;
    GLfloat *texArray = (GLfloat*)m_pTexCoordinates;
    GLushort *idxArray = m_pIndices;
    
    int x, y;
    
    for( x = 0; x < m_sGridSize.width; x++ )
    {
        for( y = 0; y < m_sGridSize.height; y++ )
        {
            float x1 = x * m_obStep.x;
            float x2 = x1 + m_obStep.x;
            float y1 = y * m_obStep.y;
            float y2 = y1 + m_obStep.y;
            
            *vertArray++ = x1;
            *vertArray++ = y1;
            *vertArray++ = 0;
            *vertArray++ = x2;
            *vertArray++ = y1;
            *vertArray++ = 0;
            *vertArray++ = x1;
            *vertArray++ = y2;
            *vertArray++ = 0;
            *vertArray++ = x2;
            *vertArray++ = y2;
            *vertArray++ = 0;
            
            float newY1 = y1;
            float newY2 = y2;
            
            if (m_bIsTextureFlipped) 
            {
                newY1 = imageH - y1;
                newY2 = imageH - y2;
            }

            *texArray++ = x1 / width;
            *texArray++ = newY1 / height;
            *texArray++ = x2 / width;
            *texArray++ = newY1 / height;
            *texArray++ = x1 / width;
            *texArray++ = newY2 / height;
            *texArray++ = x2 / width;
            *texArray++ = newY2 / height;
        }
    }
    
    for (x = 0; x < numQuads; x++)
    {
        idxArray[x*6+0] = (GLushort)(x * 4 + 0);
        idxArray[x*6+1] = (GLushort)(x * 4 + 1);
        idxArray[x*6+2] = (GLushort)(x * 4 + 2);
        
        idxArray[x*6+3] = (GLushort)(x * 4 + 1);
        idxArray[x*6+4] = (GLushort)(x * 4 + 2);
        idxArray[x*6+5] = (GLushort)(x * 4 + 3);
    }
    
    memcpy(m_pOriginalVertices, m_pVertices, numQuads * 12 * sizeof(GLfloat));
}

void CCTiledGrid3D::setTile(const CCPoint& pos, const ccQuad3& coords)
{
    CCAssert( pos.x == (unsigned int)pos.x && pos.y == (unsigned int) pos.y , "Numbers must be integers");
    int idx = (m_sGridSize.height * pos.x + pos.y) * 4 * 3;
    float *vertArray = (float*)m_pVertices;
    memcpy(&vertArray[idx], &coords, sizeof(ccQuad3));
}

ccQuad3 CCTiledGrid3D::originalTile(const CCPoint& pos)
{
    CCAssert( pos.x == (unsigned int)pos.x && pos.y == (unsigned int) pos.y , "Numbers must be integers");
    int idx = (m_sGridSize.height * pos.x + pos.y) * 4 * 3;
    float *vertArray = (float*)m_pOriginalVertices;

    ccQuad3 ret;
    memcpy(&ret, &vertArray[idx], sizeof(ccQuad3));

    return ret;
}

ccQuad3 CCTiledGrid3D::tile(const CCPoint& pos)
{
    CCAssert( pos.x == (unsigned int)pos.x && pos.y == (unsigned int) pos.y , "Numbers must be integers");
    int idx = (m_sGridSize.height * pos.x + pos.y) * 4 * 3;
    float *vertArray = (float*)m_pVertices;

    ccQuad3 ret;
    memcpy(&ret, &vertArray[idx], sizeof(ccQuad3));

    return ret;
}

void CCTiledGrid3D::reuse(void)
{
    if (m_nReuseGrid > 0)
    {
        int numQuads = m_sGridSize.width * m_sGridSize.height;

        memcpy(m_pOriginalVertices, m_pVertices, numQuads * 12 * sizeof(GLfloat));
        --m_nReuseGrid;
    }
}

NS_CC_END