120 lines
3.3 KiB
C++
120 lines
3.3 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file auxBitplaneAttrib.h
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* @author drose
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* @date 2002-03-04
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*/
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#ifndef AUXBITPLANEATTRIB_H
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#define AUXBITPLANEATTRIB_H
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#include "pandabase.h"
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#include "renderAttrib.h"
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class FactoryParams;
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/**
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* Modern frame buffers can have 'aux' bitplanes, which are additional
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* bitplanes above and beyond the standard depth and color. This attrib
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* controls what gets rendered into those additional bitplanes. It can also
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* affect what goes into the alpha channel of the primary color buffer.
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*
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* ABO_glow: copy the glow map into the alpha channel of the primary frame
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* buffer. If there is no glow map, set it to zero. Caveat: it is not
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* possible to write glow or depth values to the framebuffer alpha channel at
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* the same time as using alpha blending or alpha testing. Any attempt to use
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* transparency, blending, or alpha testing will cause this flag to be
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* overridden.
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*
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* ABO_aux_normal: put the camera-space normal into the into the R,G
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* components of the first auxiliary bitplane.
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*
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* ABO_aux_modelz: put the clip-space Z coordinate of the center of the model
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* (after perspective divide) into the B channel of the first auxiliary
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* bitplane.
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*
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* ABO_aux_glow: put a copy of the glow map into the alpha channel of the
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* first auxiliary bitplane. If there is no glow map, set it to zero.
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*
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* AuxBitplaneAttrib is relevant only when shader generation is enabled.
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* Otherwise, it has no effect.
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*
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*/
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class EXPCL_PANDA_PGRAPH AuxBitplaneAttrib : public RenderAttrib {
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private:
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INLINE AuxBitplaneAttrib(int outputs);
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PUBLISHED:
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enum AuxBitplaneOutput {
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ABO_glow = 1,
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ABO_aux_normal = 2,
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ABO_aux_glow = 4,
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};
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static CPT(RenderAttrib) make();
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static CPT(RenderAttrib) make(int outputs);
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static CPT(RenderAttrib) make_default();
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INLINE int get_outputs() const;
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PUBLISHED:
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MAKE_PROPERTY(outputs, get_outputs);
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public:
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virtual void output(std::ostream &out) const;
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protected:
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virtual int compare_to_impl(const RenderAttrib *other) const;
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virtual size_t get_hash_impl() const;
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private:
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int _outputs;
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static CPT(RenderAttrib) _default;
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PUBLISHED:
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static int get_class_slot() {
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return _attrib_slot;
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}
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virtual int get_slot() const {
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return get_class_slot();
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}
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MAKE_PROPERTY(class_slot, get_class_slot);
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public:
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static void register_with_read_factory();
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virtual void write_datagram(BamWriter *manager, Datagram &dg);
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protected:
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static TypedWritable *make_from_bam(const FactoryParams ¶ms);
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void fillin(DatagramIterator &scan, BamReader *manager);
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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RenderAttrib::init_type();
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register_type(_type_handle, "AuxBitplaneAttrib",
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RenderAttrib::get_class_type());
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_attrib_slot = register_slot(_type_handle, 100, new AuxBitplaneAttrib(0));
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}
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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private:
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static TypeHandle _type_handle;
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static int _attrib_slot;
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};
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#include "auxBitplaneAttrib.I"
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#endif
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