RAS_ListRasterizer.cpp

Go to the documentation of this file.

//
#include <iostream>

#include "RAS_ListRasterizer.h"

#ifdef WIN32
#include <windows.h>
#endif // WIN32

#include "GL/glew.h"

#include "RAS_MaterialBucket.h"
#include "RAS_TexVert.h"
#include "MT_assert.h"

//#if defined(DEBUG)
//#ifdef WIN32
//#define spit(x) std::cout << x << std::endl;
//#endif //WIN32
//#else
#define spit(x)
//#endif

RAS_ListSlot::RAS_ListSlot(RAS_ListRasterizer* rasty)
:   KX_ListSlot(),
    m_list(0),
    m_flag(LIST_MODIFY|LIST_CREATE),
    m_matnr(0),
    m_rasty(rasty)
{
}

int RAS_ListSlot::Release()
{
    if (--m_refcount > 0)
        return m_refcount;
    m_rasty->RemoveListSlot(this);
    delete this;
    return 0;
}

RAS_ListSlot::~RAS_ListSlot()
{
    RemoveList();
}


void RAS_ListSlot::RemoveList()
{
    if(m_list != 0) {
        spit("Releasing display list (" << m_list << ")");
        glDeleteLists((GLuint)m_list, 1);
        m_list =0;
    }
}

void RAS_ListSlot::DrawList()
{
    if(m_flag &LIST_STREAM || m_flag& LIST_NOCREATE) {
        RemoveList();
        return;
    }
    if(m_flag &LIST_MODIFY) {
        if(m_flag &LIST_CREATE) {
            if(m_list == 0) {
                m_list = (unsigned int)glGenLists(1);
                m_flag =  m_flag &~ LIST_CREATE;
                spit("Created display list (" << m_list << ")");
            }
        }
        if(m_list != 0)
            glNewList((GLuint)m_list, GL_COMPILE);
    
        m_flag |= LIST_BEGIN;
        return;
    }
    glCallList(m_list);
}

void RAS_ListSlot::EndList()
{
    if(m_flag & LIST_BEGIN) {
        glEndList();
        m_flag = m_flag &~(LIST_BEGIN|LIST_MODIFY);
        m_flag |= LIST_END;
        glCallList(m_list);
    }
}

void RAS_ListSlot::SetModified(bool mod)
{
    if(mod && !(m_flag & LIST_MODIFY)) {
        spit("Modifying list (" << m_list << ")");
        m_flag = m_flag &~ LIST_END;
        m_flag |= LIST_STREAM;
    }
}

bool RAS_ListSlot::End()
{
    return (m_flag &LIST_END)!=0;
}



RAS_ListRasterizer::RAS_ListRasterizer(RAS_ICanvas* canvas, bool useVertexArrays, bool lock)
:   RAS_VAOpenGLRasterizer(canvas, lock),
    mUseVertexArrays(useVertexArrays),
    mATI(false)
{
    if (!strcmp((const char*)glGetString(GL_VENDOR), "ATI Technologies Inc."))
        mATI = true;
}

RAS_ListRasterizer::~RAS_ListRasterizer() 
{
    ReleaseAlloc();
}

void RAS_ListRasterizer::RemoveListSlot(RAS_ListSlot* list)
{
    if (list->m_flag & LIST_DERIVEDMESH) {
        RAS_DerivedMeshLists::iterator it = mDerivedMeshLists.begin();
        while(it != mDerivedMeshLists.end()) {
            RAS_ListSlots *slots = it->second;
            if (slots->size() > list->m_matnr && slots->at(list->m_matnr) == list) {
                (*slots)[list->m_matnr] = NULL;
                // check if all slots are NULL and if yes, delete the entry
                int i;
                for (i=slots->size(); i-- > 0; ) {
                    if (slots->at(i) != NULL)
                        break;
                }
                if (i < 0) {
                    slots->clear();
                    delete slots;
                    mDerivedMeshLists.erase(it);
                }
                break;
            }
            ++it;
        }
    } else {
        RAS_ArrayLists::iterator it = mArrayLists.begin();
        while(it != mArrayLists.end()) {
            if (it->second == list) {
                mArrayLists.erase(it);
                break;
            }
            it++;
        }
    }
}

RAS_ListSlot* RAS_ListRasterizer::FindOrAdd(RAS_MeshSlot& ms)
{
    /*
     Keep a copy of constant lists submitted for rendering,
        this guards against (replicated)new...delete every frame,
        and we can reuse lists!
        :: sorted by mesh slot
    */
    RAS_ListSlot* localSlot = (RAS_ListSlot*)ms.m_DisplayList;
    if(!localSlot) {
        if (ms.m_pDerivedMesh) {
            // that means that we draw based on derived mesh, a display list is possible
            // Note that we come here only for static derived mesh
            int matnr = ms.m_bucket->GetPolyMaterial()->GetMaterialIndex();
            RAS_ListSlot* nullSlot = NULL;
            RAS_ListSlots *listVector;
            RAS_DerivedMeshLists::iterator it = mDerivedMeshLists.find(ms.m_pDerivedMesh);
            if(it == mDerivedMeshLists.end()) {
                listVector = new RAS_ListSlots(matnr+4, nullSlot);
                localSlot = new RAS_ListSlot(this);
                localSlot->m_flag |= LIST_DERIVEDMESH;
                localSlot->m_matnr = matnr;
                listVector->at(matnr) = localSlot;
                mDerivedMeshLists.insert(std::pair<DerivedMesh*, RAS_ListSlots*>(ms.m_pDerivedMesh, listVector));
            } else {
                listVector = it->second;
                if (listVector->size() <= matnr)
                    listVector->resize(matnr+4, nullSlot);
                if ((localSlot = listVector->at(matnr)) == NULL) {
                    localSlot = new RAS_ListSlot(this);
                    localSlot->m_flag |= LIST_DERIVEDMESH;
                    localSlot->m_matnr = matnr;
                    listVector->at(matnr) = localSlot;
                } else {
                    localSlot->AddRef();
                }
            }
        } else {
            RAS_ArrayLists::iterator it = mArrayLists.find(ms.m_displayArrays);
            if(it == mArrayLists.end()) {
                localSlot = new RAS_ListSlot(this);
                mArrayLists.insert(std::pair<RAS_DisplayArrayList, RAS_ListSlot*>(ms.m_displayArrays, localSlot));
            } else {
                localSlot = static_cast<RAS_ListSlot*>(it->second->AddRef());
            }
        }
    }
    MT_assert(localSlot);
    return localSlot;
}

void RAS_ListRasterizer::ReleaseAlloc()
{
    for(RAS_ArrayLists::iterator it = mArrayLists.begin();it != mArrayLists.end();++it)
        delete it->second;
    mArrayLists.clear();
    for (RAS_DerivedMeshLists::iterator it = mDerivedMeshLists.begin();it != mDerivedMeshLists.end();++it) {
        RAS_ListSlots* slots = it->second;
        for (int i=slots->size(); i-- > 0; ) {
            RAS_ListSlot* slot = slots->at(i);
            if (slot)
                delete slot;
        }
        slots->clear();
        delete slots;
    }
    mDerivedMeshLists.clear();
}

void RAS_ListRasterizer::IndexPrimitives(RAS_MeshSlot& ms)
{
    RAS_ListSlot* localSlot =0;

    if(ms.m_bDisplayList) {
        localSlot = FindOrAdd(ms);
        localSlot->DrawList();
        if(localSlot->End()) {
            // save slot here too, needed for replicas and object using same mesh
            // => they have the same vertexarray but different mesh slot
            ms.m_DisplayList = localSlot;
            return;
        }
    }
    // derived mesh cannot use vertex array
    if (mUseVertexArrays && !ms.m_pDerivedMesh)
        RAS_VAOpenGLRasterizer::IndexPrimitives(ms);
    else
        RAS_OpenGLRasterizer::IndexPrimitives(ms);

    if(ms.m_bDisplayList) {
        localSlot->EndList();
        ms.m_DisplayList = localSlot;
    }
}


void RAS_ListRasterizer::IndexPrimitivesMulti(RAS_MeshSlot& ms)
{
    RAS_ListSlot* localSlot =0;

    if(ms.m_bDisplayList) {
        localSlot = FindOrAdd(ms);
        localSlot->DrawList();

        if(localSlot->End()) {
            // save slot here too, needed for replicas and object using same mesh
            // => they have the same vertexarray but different mesh slot
            ms.m_DisplayList = localSlot;
            return;
        }
    }

    // workaround: note how we do not use vertex arrays for making display
    // lists, since glVertexAttribPointerARB doesn't seem to work correct
    // in display lists on ATI? either a bug in the driver or in Blender ..
    if (mUseVertexArrays && !mATI && !ms.m_pDerivedMesh)
        RAS_VAOpenGLRasterizer::IndexPrimitivesMulti(ms);
    else
        RAS_OpenGLRasterizer::IndexPrimitivesMulti(ms);

    if(ms.m_bDisplayList) {
        localSlot->EndList();
        ms.m_DisplayList = localSlot;
    }
}

bool RAS_ListRasterizer::Init(void)
{
    if (mUseVertexArrays) {
        return RAS_VAOpenGLRasterizer::Init();
    } else {
        return RAS_OpenGLRasterizer::Init();
    }
}

void RAS_ListRasterizer::SetDrawingMode(int drawingmode)
{
    if (mUseVertexArrays) {
        RAS_VAOpenGLRasterizer::SetDrawingMode(drawingmode);
    } else {
        RAS_OpenGLRasterizer::SetDrawingMode(drawingmode);
    }
}

void RAS_ListRasterizer::Exit()
{
    if (mUseVertexArrays) {
        RAS_VAOpenGLRasterizer::Exit();
    } else {
        RAS_OpenGLRasterizer::Exit();
    }
}

// eof