C++ (Cpp) VertexBufferBinding::getBindings示例

示例#1

文件： OgreImGui.cpp 项目： monwarez/rigs-of-rods

/// @author https://bitbucket.org/ChaosCreator/imgui-ogre2.1-binding/src/8f1a01db510f543a987c3c16859d0a33400d9097/ImguiRenderable.cpp?at=master&fileviewer=file-view-default
/// Commentary on OGRE forums: http://www.ogre3d.org/forums/viewtopic.php?f=5&t=89081#p531059
void OgreImGui::ImGUIRenderable::updateVertexData(const ImDrawVert* vtxBuf, const ImDrawIdx* idxBuf, unsigned int vtxCount, unsigned int idxCount)
{
    Ogre::VertexBufferBinding* bind = mRenderOp.vertexData->vertexBufferBinding;

    if (bind->getBindings().empty() || mVertexBufferSize != vtxCount)
    {
        mVertexBufferSize = vtxCount;

        bind->setBinding(0, Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(sizeof(ImDrawVert), mVertexBufferSize, Ogre::HardwareBuffer::HBU_WRITE_ONLY));
    }
    if (mRenderOp.indexData->indexBuffer.isNull() || mIndexBufferSize != idxCount)
    {
        mIndexBufferSize = idxCount;

        mRenderOp.indexData->indexBuffer =
            Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(Ogre::HardwareIndexBuffer::IT_16BIT, mIndexBufferSize, Ogre::HardwareBuffer::HBU_WRITE_ONLY);
    }

    // Copy all vertices
    ImDrawVert* vtxDst = (ImDrawVert*)(bind->getBuffer(0)->lock(Ogre::HardwareBuffer::HBL_DISCARD));
    ImDrawIdx* idxDst = (ImDrawIdx*)(mRenderOp.indexData->indexBuffer->lock(Ogre::HardwareBuffer::HBL_DISCARD));

    memcpy(vtxDst, vtxBuf, mVertexBufferSize * sizeof(ImDrawVert));
    memcpy(idxDst, idxBuf, mIndexBufferSize * sizeof(ImDrawIdx));

    mRenderOp.vertexData->vertexStart = 0;
    mRenderOp.vertexData->vertexCount = vtxCount;
    mRenderOp.indexData->indexStart = 0;
    mRenderOp.indexData->indexCount = idxCount;


    bind->getBuffer(0)->unlock();
    mRenderOp.indexData->indexBuffer->unlock();
}

示例#2

文件： OgreImGui.cpp 项目： disloyalpick/rigs-of-rods

void OgreImGui::ImGUIRenderable::updateVertexData(ImDrawData* draw_data,unsigned int cmdIndex)
{
    Ogre::VertexBufferBinding* bind   = mRenderOp.vertexData->vertexBufferBinding;

    const ImDrawList* cmd_list = draw_data->CmdLists[cmdIndex];

    if (bind->getBindings().empty() || mVertexBufferSize != cmd_list->VtxBuffer.size())
    {
        mVertexBufferSize = cmd_list->VtxBuffer.size();
        bind->setBinding(0,Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(sizeof(ImDrawVert),mVertexBufferSize,Ogre::HardwareBuffer::HBU_WRITE_ONLY));
    }

    if (mRenderOp.indexData->indexBuffer.isNull() || mIndexBufferSize != cmd_list->IdxBuffer.size())
    {
        mIndexBufferSize = cmd_list->IdxBuffer.size();

        mRenderOp.indexData->indexBuffer=
        Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(Ogre::HardwareIndexBuffer::IT_16BIT,mIndexBufferSize,Ogre::HardwareBuffer::HBU_WRITE_ONLY);
    }

    // Copy all vertices
    ImDrawVert* vtx_dst = (ImDrawVert*)(bind->getBuffer(0)->lock(Ogre::HardwareBuffer::HBL_DISCARD));
    ImDrawIdx* idx_dst = (ImDrawIdx*)(mRenderOp.indexData->indexBuffer->lock(Ogre::HardwareBuffer::HBL_DISCARD));

    memcpy(vtx_dst, &cmd_list->VtxBuffer[0], mVertexBufferSize * sizeof(ImDrawVert));
    memcpy(idx_dst, &cmd_list->IdxBuffer[0], mIndexBufferSize * sizeof(ImDrawIdx));

    mRenderOp.vertexData->vertexStart = 0;
    mRenderOp.vertexData->vertexCount =  cmd_list->VtxBuffer.size();
    mRenderOp.indexData->indexStart = 0;
    mRenderOp.indexData->indexCount =  cmd_list->IdxBuffer.size();

    bind->getBuffer(0)->unlock();
    mRenderOp.indexData->indexBuffer->unlock();
}