forked from teamnwah/openmw-tes3coop
94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
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/*!
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@file
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@author Albert Semenov
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@date 04/2009
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@module
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*/
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#include "MyGUI_OgreVertexBuffer.h"
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#include "Ogre.h"
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#include "MyGUI_LastHeader.h"
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namespace MyGUI
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{
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const size_t VERTEX_IN_QUAD = 6;
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const size_t RENDER_ITEM_STEEP_REALLOCK = 5 * VERTEX_IN_QUAD;
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OgreVertexBuffer::OgreVertexBuffer() :
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mVertexCount(RENDER_ITEM_STEEP_REALLOCK),
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mNeedVertexCount(0)
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{
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createVertexBuffer();
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}
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OgreVertexBuffer::~OgreVertexBuffer()
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{
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destroyVertexBuffer();
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}
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void OgreVertexBuffer::createVertexBuffer()
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{
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mRenderOperation.vertexData = new Ogre::VertexData();
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mRenderOperation.vertexData->vertexStart = 0;
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Ogre::VertexDeclaration* vd = mRenderOperation.vertexData->vertexDeclaration;
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vd->addElement( 0, 0, Ogre::VET_FLOAT3, Ogre::VES_POSITION );
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vd->addElement( 0, Ogre::VertexElement::getTypeSize( Ogre::VET_FLOAT3 ), Ogre::VET_COLOUR, Ogre::VES_DIFFUSE );
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vd->addElement( 0, Ogre::VertexElement::getTypeSize( Ogre::VET_FLOAT3 ) +
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Ogre::VertexElement::getTypeSize( Ogre::VET_COLOUR ),
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Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES );
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// Create the Vertex Buffer, using the Vertex Structure we previously declared in _declareVertexStructure.
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mVertexBuffer = Ogre::HardwareBufferManager::getSingleton( ).createVertexBuffer(
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mRenderOperation.vertexData->vertexDeclaration->getVertexSize(0), // declared Vertex used
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mVertexCount,
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Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE,
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false );
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// Bind the created buffer to the renderOperation object. Now we can manipulate the buffer, and the RenderOp keeps the changes.
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mRenderOperation.vertexData->vertexBufferBinding->setBinding( 0, mVertexBuffer );
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mRenderOperation.operationType = Ogre::RenderOperation::OT_TRIANGLE_LIST;
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mRenderOperation.useIndexes = false;
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}
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void OgreVertexBuffer::destroyVertexBuffer()
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{
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delete mRenderOperation.vertexData;
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mRenderOperation.vertexData = 0;
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mVertexBuffer.setNull();
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}
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void OgreVertexBuffer::resizeVertexBuffer()
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{
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mVertexCount = mNeedVertexCount + RENDER_ITEM_STEEP_REALLOCK;
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destroyVertexBuffer();
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createVertexBuffer();
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}
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void OgreVertexBuffer::setVertextCount(size_t _count)
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{
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mNeedVertexCount = _count;
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}
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size_t OgreVertexBuffer::getVertextCount()
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{
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return mNeedVertexCount;
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}
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Vertex* OgreVertexBuffer::lock()
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{
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if (mNeedVertexCount > mVertexCount) resizeVertexBuffer();
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return (Vertex*)mVertexBuffer->lock(Ogre::HardwareVertexBuffer::HBL_DISCARD);
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}
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void OgreVertexBuffer::unlock()
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{
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mVertexBuffer->unlock();
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}
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} // namespace MyGUI
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