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270 lines
7.2 KiB
270 lines
7.2 KiB
/*==LICENSE==* |
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CyanWorlds.com Engine - MMOG client, server and tools |
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Copyright (C) 2011 Cyan Worlds, Inc. |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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You can contact Cyan Worlds, Inc. by email legal@cyan.com |
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or by snail mail at: |
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Cyan Worlds, Inc. |
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14617 N Newport Hwy |
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Mead, WA 99021 |
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*==LICENSE==*/ |
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#include "hsTypes.h" |
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#include "plAccessSnapShot.h" |
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#include "hsGeometry3.h" |
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#include <memory.h> |
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void plAccessSnapShot::Clear() |
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{ |
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ClearVerts(); |
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int i; |
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for( i = 0; i < kNumValidChans; i++ ) |
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fChanSize[i] = 0; |
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} |
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void plAccessSnapShot::Destroy() |
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{ |
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Clear(); |
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delete [] fData; |
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fRefCnt = 0; |
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} |
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void plAccessSnapShot::Release() |
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{ |
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hsAssert(fRefCnt, "Releasing a snapshot with no refs. Check matching TakeSnapShot/ReleaseSnapShot calls."); |
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if( !--fRefCnt ) |
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{ |
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Destroy(); |
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} |
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} |
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UInt32 plAccessSnapShot::ICheckAlloc(const plAccessVtxSpan& src, UInt32 chanMask, UInt32 chan, UInt16 chanSize) |
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{ |
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if( ((1 << chan) & chanMask) && src.fStrides[chan] ) |
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{ |
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if( fChanSize[chan] ) |
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{ |
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// We already have this one |
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chanMask &= ~(1 << chan); |
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} |
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else |
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{ |
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// We'll get this one |
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fChanSize[chan] = chanSize; |
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} |
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} |
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else |
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{ |
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// either we haven't been asked for this or src doesn't have it. |
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// either way, we're never going to get it. |
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chanMask &= ~(1 << chan); |
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} |
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return chanMask; |
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} |
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void plAccessSnapShot::IRecordSizes(UInt16 sizes[]) const |
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{ |
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int chan; |
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for( chan = 0; chan < kNumValidChans; chan++ ) |
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sizes[chan] = fChanSize[chan]; |
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} |
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UInt16 plAccessSnapShot::IComputeStride() const |
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{ |
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UInt16 stride = 0; |
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int chan; |
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for( chan = 0; chan < kNumValidChans; chan++ ) |
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stride += fChanSize[chan]; |
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return stride; |
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} |
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void plAccessSnapShot::ICopyOldData(UInt8* data, const UInt16* const oldSizes, UInt16 oldStride, UInt16 newStride) |
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{ |
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UInt32 oldOffset = 0; |
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UInt32 newOffset = 0; |
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UInt8* srcChannels[kNumValidChans]; |
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UInt8* dstChannels[kNumValidChans]; |
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int chan; |
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for( chan = 0; chan < kNumValidChans; chan++ ) |
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{ |
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if( oldSizes[chan] ) |
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{ |
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hsAssert(fChanSize[chan], "Copying a channel we don't have"); |
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srcChannels[chan] = data + oldOffset; |
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oldOffset += oldSizes[chan]; |
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} |
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if( fChanSize[chan] ) |
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{ |
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dstChannels[chan] = fData + newOffset; |
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newOffset += fChanSize[chan]; |
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} |
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} |
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int i; |
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for( i = 0; i < fNumVerts; i++ ) |
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{ |
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for( chan = 0; chan < kNumValidChans; chan++ ) |
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{ |
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if( oldSizes[chan] ) |
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{ |
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memcpy(dstChannels[chan], srcChannels[chan], oldSizes[chan]); |
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dstChannels[chan] += newStride; |
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srcChannels[chan] += oldStride; |
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} |
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} |
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} |
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} |
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void plAccessSnapShot::ISetupPointers(UInt16 newStride) |
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{ |
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fData = TRACKED_NEW UInt8[fNumVerts * newStride]; |
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int size = 0; |
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int chan; |
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for( chan = 0; chan < kNumValidChans; chan++ ) |
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{ |
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if( fChanSize[chan] ) |
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{ |
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fStrides[chan] = newStride; |
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fChannels[chan] = fData + size; |
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size += fChanSize[chan]; |
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} |
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} |
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} |
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UInt32 plAccessSnapShot::CopyFrom(const plAccessVtxSpan& src, UInt32 chanMask) |
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{ |
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hsAssert(!fNumVerts || (fNumVerts == src.fNumVerts), "Copying from a different sized span"); |
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fNumVerts = src.fNumVerts; |
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UInt16 oldSize[kNumValidChans]; |
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UInt8* oldData = fData; |
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IRecordSizes(oldSize); |
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UInt16 oldStride = IComputeStride(); |
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// First, allocate any storage we need. Kill any requested channels out of the |
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// mask that we already have. |
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chanMask = ICheckAlloc(src, chanMask, kPosition, sizeof(hsPoint3)); |
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chanMask = ICheckAlloc(src, chanMask, kWeight, sizeof(hsScalar) * src.fNumWeights); |
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if( fChanSize[kWeight] ) |
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fNumWeights = src.fNumWeights; |
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chanMask = ICheckAlloc(src, chanMask, kWgtIndex, sizeof(UInt32)); |
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chanMask = ICheckAlloc(src, chanMask, kNormal, sizeof(hsVector3)); |
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chanMask = ICheckAlloc(src, chanMask, kDiffuse, sizeof(UInt32)); |
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chanMask = ICheckAlloc(src, chanMask, kSpecular, sizeof(UInt32)); |
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chanMask = ICheckAlloc(src, chanMask, kUVW, sizeof(hsPoint3) * src.fNumUVWsPerVert); |
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if( fChanSize[kUVW] ) |
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fNumUVWsPerVert = src.fNumUVWsPerVert; |
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// If our chanMask has gone to zero, we've only been asked to record |
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// channels we already have, so there's nothing to do. |
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if( !chanMask ) |
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return 0; |
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UInt16 newStride = IComputeStride(); |
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ISetupPointers(newStride); |
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ICopyOldData(oldData, oldSize, oldStride, newStride); |
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UInt8* srcChannels[kNumValidChans]; |
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UInt8* dstChannels[kNumValidChans]; |
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int chan; |
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for( chan = 0; chan < kNumValidChans; chan++ ) |
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{ |
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srcChannels[chan] = src.fChannels[chan]; |
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dstChannels[chan] = fChannels[chan]; |
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} |
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int i; |
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for( i = 0; i < src.VertCount(); i++ ) |
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{ |
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for( chan = 0; chan < kNumValidChans; chan++ ) |
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{ |
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if( (1<< chan) & chanMask ) |
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{ |
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memcpy(dstChannels[chan], srcChannels[chan], fChanSize[chan]); |
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dstChannels[chan] += fStrides[chan]; |
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srcChannels[chan] += src.fStrides[chan]; |
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} |
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} |
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} |
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return chanMask; |
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} |
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UInt32 plAccessSnapShot::CopyTo(const plAccessVtxSpan& dst, UInt32 chanMask) |
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{ |
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hsAssert(fNumVerts == dst.fNumVerts, "Vertex count mismatch, is this our real source?"); |
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int chan; |
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for( chan = 0; chan < kNumValidChans; chan++ ) |
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{ |
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if( !(fChanSize[chan] && dst.fStrides[chan]) ) |
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chanMask &= ~(1 << chan); |
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} |
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// If chanMask has gone to zero, either we don't have any of the requested channels |
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// recorded, or dst doesn't have them. Both being true is valid, but |
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// us having a channel recorded that's not in dst is probably an error. |
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if( !chanMask ) |
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return 0; |
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int i; |
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for( i = 0; i < fNumVerts; i++ ) |
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{ |
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for( chan = 0; chan < kNumValidChans; chan++ ) |
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{ |
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if( (1 << chan) & chanMask ) |
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{ |
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memcpy( |
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dst.fChannels[chan] + dst.fStrides[chan] * i, |
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fChannels[chan] + fStrides[chan] * i, |
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fChanSize[chan]); |
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} |
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} |
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} |
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return chanMask; |
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} |
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void plAccessSnapShot::SetupChannels(plAccessVtxSpan& dst) const |
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{ |
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int chan; |
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for( chan = 0; chan < kNumValidChans; chan++ ) |
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{ |
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if( fChanSize[chan] ) |
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{ |
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dst.fChannels[chan] = fChannels[chan]; |
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dst.fStrides[chan] = fStrides[chan]; |
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dst.fOffsets[chan] = 0; |
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} |
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} |
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}
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