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84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
/* -----------------------------------------------------------------------------
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Copyright (c) 2006 Simon Brown si@sjbrown.co.uk
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Copyright (c) 2006 Ignacio Castano icastano@nvidia.com
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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-------------------------------------------------------------------------- */
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#ifndef NVTT_CLUSTERFIT_H
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#define NVTT_CLUSTERFIT_H
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#include "nvmath/SimdVector.h"
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#include "nvmath/Vector.h"
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#include "nvcore/Memory.h"
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// Use SIMD version if altivec or SSE are available.
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#define NVTT_USE_SIMD (NV_USE_ALTIVEC || NV_USE_SSE)
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//#define NVTT_USE_SIMD 0
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namespace nv {
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struct ColorSet;
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class ClusterFit
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{
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public:
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ClusterFit();
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//void setColorSet(const ColorSet * set);
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void setColorSet(const Vector3 * colors, const float * weights, int count);
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void setColorWeights(const Vector4 & w);
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float bestError() const;
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bool compress3(Vector3 * start, Vector3 * end);
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bool compress4(Vector3 * start, Vector3 * end);
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private:
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uint m_count;
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// IC: Color and weight arrays are larger than necessary to avoid compiler warning.
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#if NVTT_USE_SIMD
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NV_ALIGN_16 SimdVector m_weighted[17]; // color | weight
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SimdVector m_metric; // vec3
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SimdVector m_metricSqr; // vec3
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SimdVector m_xxsum; // color | weight
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SimdVector m_xsum; // color | weight (wsum)
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SimdVector m_besterror; // scalar
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#else
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Vector3 m_weighted[17];
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float m_weights[17];
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Vector3 m_metric;
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Vector3 m_metricSqr;
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Vector3 m_xxsum;
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Vector3 m_xsum;
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float m_wsum;
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float m_besterror;
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#endif
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};
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} // nv namespace
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#endif // NVTT_CLUSTERFIT_H
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