//---------------------------------------------------------------------
void PanelOverlayElement::_releaseManualHardwareResources()
{
if(!mInitialised)
return;
VertexBufferBinding* bind = mRenderOp.vertexData->vertexBufferBinding;
bind->unsetBinding(POSITION_BINDING);
// Remove all texcoord element declarations
if(mNumTexCoordsInBuffer > 0)
{
bind->unsetBinding(TEXCOORD_BINDING);
VertexDeclaration* decl = mRenderOp.vertexData->vertexDeclaration;
for(size_t i = mNumTexCoordsInBuffer; i > 0; --i)
{
decl->removeElement(VES_TEXTURE_COORDINATES,
static_cast<unsigned short>(i - 1));
}
mNumTexCoordsInBuffer = 0;
}
}
//---------------------------------------------------------------------
void PanelOverlayElement::updateTextureGeometry(void)
{
// Generate for as many texture layers as there are in material
if (!mpMaterial.isNull() && mInitialised)
{
// Assume one technique and pass for the moment
size_t numLayers = mpMaterial->getTechnique(0)->getPass(0)->getNumTextureUnitStates();
VertexDeclaration* decl = mRenderOp.vertexData->vertexDeclaration;
// Check the number of texcoords we have in our buffer now
if (mNumTexCoordsInBuffer > numLayers)
{
// remove extras
for (size_t i = mNumTexCoordsInBuffer; i > numLayers; --i)
{
decl->removeElement(VES_TEXTURE_COORDINATES,
static_cast<unsigned short>(i));
}
}
else if (mNumTexCoordsInBuffer < numLayers)
{
// Add extra texcoord elements
size_t offset = VertexElement::getTypeSize(VET_FLOAT2) * mNumTexCoordsInBuffer;
for (size_t i = mNumTexCoordsInBuffer; i < numLayers; ++i)
{
decl->addElement(TEXCOORD_BINDING,
offset, VET_FLOAT2, VES_TEXTURE_COORDINATES,
static_cast<unsigned short>(i));
offset += VertexElement::getTypeSize(VET_FLOAT2);
}
}
// if number of layers changed at all, we'll need to reallocate buffer
if (mNumTexCoordsInBuffer != numLayers)
{
// NB reference counting will take care of the old one if it exists
HardwareVertexBufferSharedPtr newbuf =
HardwareBufferManager::getSingleton().createVertexBuffer(
decl->getVertexSize(TEXCOORD_BINDING), mRenderOp.vertexData->vertexCount,
HardwareBuffer::HBU_STATIC_WRITE_ONLY // mostly static except during resizing
);
// Bind buffer, note this will unbind the old one and destroy the buffer it had
mRenderOp.vertexData->vertexBufferBinding->setBinding(TEXCOORD_BINDING, newbuf);
// Set num tex coords in use now
mNumTexCoordsInBuffer = numLayers;
}
// Get the tcoord buffer & lock
if (mNumTexCoordsInBuffer)
{
HardwareVertexBufferSharedPtr vbuf =
mRenderOp.vertexData->vertexBufferBinding->getBuffer(TEXCOORD_BINDING);
float* pVBStart = static_cast<float*>(
vbuf->lock(HardwareBuffer::HBL_DISCARD) );
size_t uvSize = VertexElement::getTypeSize(VET_FLOAT2) / sizeof(float);
size_t vertexSize = decl->getVertexSize(TEXCOORD_BINDING) / sizeof(float);
for (ushort i = 0; i < numLayers; ++i)
{
// Calc upper tex coords
Real upperX = mU2 * mTileX[i];
Real upperY = mV2 * mTileY[i];
/*
0-----2
| /|
| / |
|/ |
1-----3
*/
// Find start offset for this set
float* pTex = pVBStart + (i * uvSize);
pTex[0] = mU1;
pTex[1] = mV1;
pTex += vertexSize; // jump by 1 vertex stride
pTex[0] = mU1;
pTex[1] = upperY;
pTex += vertexSize;
pTex[0] = upperX;
pTex[1] = mV1;
pTex += vertexSize;
pTex[0] = upperX;
pTex[1] = upperY;
}
vbuf->unlock();
}
}
}