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114 lines
3.5 KiB
C++
114 lines
3.5 KiB
C++
// Copyright (c) 2009-2011 Ignacio Castano <castano@gmail.com>
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#ifndef NVTT_CUBEIMAGE_H
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#define NVTT_CUBEIMAGE_H
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#include "nvtt.h"
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#include "Surface.h"
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#include "nvimage/FloatImage.h"
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#include "nvmath/Vector.h"
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#include "nvcore/RefCounted.h"
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#include "nvcore/Ptr.h"
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#include "nvcore/Array.h"
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namespace nvtt
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{
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struct TexelTable {
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TexelTable(uint edgeLength);
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float solidAngle(uint f, uint x, uint y) const;
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const nv::Vector3 & direction(uint f, uint x, uint y) const;
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uint size;
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nv::Array<float> solidAngleArray;
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nv::Array<nv::Vector3> directionArray;
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};
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struct CubeSurface::Private : public nv::RefCounted
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{
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void operator=(const Private &);
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public:
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Private()
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{
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nvDebugCheck( refCount() == 0 );
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edgeLength = 0;
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texelTable = NULL;
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}
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Private(const Private & p) : RefCounted() // Copy ctor. inits refcount to 0.
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{
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nvDebugCheck( refCount() == 0 );
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edgeLength = p.edgeLength;
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for (uint i = 0; i < 6; i++) {
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face[i] = p.face[i];
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}
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texelTable = NULL; // @@ Transfer tables. Needs refcounting?
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}
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~Private()
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{
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delete texelTable;
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}
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void allocate(uint edgeLength)
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{
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this->edgeLength = edgeLength;
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for (uint i = 0; i < 6; i++) {
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face[i].detach();
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face[i].m->image = new nv::FloatImage;
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face[i].m->image->allocate(4, edgeLength, edgeLength, 1);
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}
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}
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void allocateTexelTable()
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{
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if (edgeLength == 0) {
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edgeLength = face[0].width();
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}
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if (texelTable == NULL) {
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texelTable = new TexelTable(edgeLength);
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}
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}
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// Filtering helpers:
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nv::Vector3 applyAngularFilter(const nv::Vector3 & dir, float coneAngle, float * filterTable, int tableSize);
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nv::Vector3 applyCosinePowerFilter(const nv::Vector3 & dir, float coneAngle, float cosinePower);
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nv::Vector3 sample(const nv::Vector3 & dir);
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uint edgeLength;
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Surface face[6];
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TexelTable * texelTable;
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};
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} // nvtt namespace
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#endif // NVTT_CUBEIMAGE_H
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