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Ptex
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Separable filter with width=4 support. More...
Public Types | |
| typedef float | KernelFn(float x, const float *c) |
Public Types inherited from PtexFilter | |
| enum | FilterType { f_point , f_bilinear , f_box , f_gaussian , f_bicubic , f_bspline , f_catmullrom , f_mitchell } |
| Filter types. More... | |
Public Member Functions | |
| PtexWidth4Filter (PtexTexture *tx, const PtexFilter::Options &opts, KernelFn k, const float *c=0) | |
| virtual void | buildKernel (PtexSeparableKernel &k, float u, float v, float uw, float vw, Res faceRes) |
Public Member Functions inherited from PtexSeparableFilter | |
| virtual void | release () |
| Release resources held by this pointer (pointer becomes invalid). | |
| virtual void | eval (float *result, int firstchan, int nchannels, int faceid, float u, float v, float uw1, float vw1, float uw2, float vw2, float width, float blur) |
| Apply filter to a ptex data file. | |
Private Member Functions | |
| float | blur (float x) |
| void | buildKernelAxis (int8_t &k_ureslog2, int &k_u, int &k_uw, float *ku, float u, float uw, int f_ureslog2) |
Private Attributes | |
| KernelFn * | _k |
| const float * | _c |
Additional Inherited Members | |
Static Public Member Functions inherited from PtexFilter | |
| static PtexFilter * | getFilter (PtexTexture *tx, const Options &opts) |
Protected Member Functions inherited from PtexSeparableFilter | |
| PtexSeparableFilter (PtexTexture *tx, const PtexFilter::Options &opts) | |
| virtual | ~PtexSeparableFilter () |
| void | splitAndApply (PtexSeparableKernel &k, int faceid, const Ptex::FaceInfo &f) |
| void | applyAcrossEdge (PtexSeparableKernel &k, int faceid, const Ptex::FaceInfo &f, int eid) |
| void | applyToCorner (PtexSeparableKernel &k, int faceid, const Ptex::FaceInfo &f, int eid) |
| void | applyToCornerFace (PtexSeparableKernel &k, const Ptex::FaceInfo &f, int eid, int cfaceid, const Ptex::FaceInfo &cf, int ceid) |
| void | apply (PtexSeparableKernel &k, int faceid, const Ptex::FaceInfo &f) |
Protected Member Functions inherited from PtexFilter | |
| virtual | ~PtexFilter () |
| Destructor not for public use. Use release() instead. | |
Protected Attributes inherited from PtexSeparableFilter | |
| PtexTexture * | _tx |
| Options | _options |
| float * | _result |
| float | _weight |
| int | _firstChanOffset |
| int | _nchan |
| int | _ntxchan |
| DataType | _dt |
| BorderMode | _uMode |
| BorderMode | _vMode |
| EdgeFilterMode | _efm |
Separable filter with width=4 support.
The kernel width is calculated as a multiple of 4 times the filter width and the texture resolution is chosen such that each kernel axis has between 4 and 8.
For kernel widths too large to handle (because the kernel would extend significantly beyond both sides of the face), a special Hermite smoothstep is used to interpolate the two nearest 2 samples along the affected axis (or axes).
Definition at line 116 of file PtexFilters.cpp.
| typedef float PtexWidth4Filter::KernelFn(float x, const float *c) |
Definition at line 119 of file PtexFilters.cpp.
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inline |
Definition at line 121 of file PtexFilters.cpp.
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inlineprivate |
Definition at line 133 of file PtexFilters.cpp.
References PtexUtils::abs().
Referenced by buildKernelAxis().
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inlinevirtual |
Implements PtexSeparableFilter.
Definition at line 124 of file PtexFilters.cpp.
References buildKernelAxis(), PtexSeparableKernel::ku, PtexSeparableKernel::kv, PtexSeparableKernel::res, PtexSeparableKernel::u, PtexSeparableKernel::uw, PtexSeparableKernel::v, and PtexSeparableKernel::vw.
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inlineprivate |
Definition at line 141 of file PtexFilters.cpp.
References _c, _k, PtexSeparableFilter::_options, blur(), PtexUtils::calcResFromWidth(), PtexFilter::Options::lerp, PtexUtils::max(), and PtexUtils::reciprocalPow2().
Referenced by buildKernel().
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private |
Definition at line 247 of file PtexFilters.cpp.
Referenced by buildKernelAxis().
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private |
Definition at line 246 of file PtexFilters.cpp.
Referenced by buildKernelAxis().