125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
// Filename: auxBitplaneAttrib.h
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// Created by: drose (04Mar02)
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//
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////////////////////////////////////////////////////////////////////
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//
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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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////////////////////////////////////////////////////////////////////
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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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// Class : AuxBitplaneAttrib
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// Description : Modern frame buffers can have 'aux' bitplanes, which
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// are additional bitplanes above and beyond the
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// standard depth and color. This attrib controls what
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// gets rendered into those additional bitplanes. It
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// can also affect what goes into the alpha channel
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// of the primary color buffer.
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//
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// ABO_glow: copy the glow map into the alpha channel
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// of the primary frame buffer. If there is no glow
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// map, set it to zero. Caveat: it is not
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// possible to write glow or depth values to the
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// framebuffer alpha channel at the same time as using
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// alpha blending or alpha testing. Any attempt to use
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// transparency, blending, or alpha testing will cause
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// this flag to be overridden.
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//
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// ABO_aux_normal: put the camera-space normal into
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// the into the R,G components of the first auxiliary
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// bitplane.
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//
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// ABO_aux_modelz: put the clip-space Z coordinate of
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// the center of the model (after perspective divide)
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// into the B channel of the first auxiliary bitplane.
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//
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// ABO_aux_glow: put a copy of the glow map into the
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// alpha channel of the first auxiliary bitplane.
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// If there is no glow map, set it to zero.
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//
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// AuxBitplaneAttrib is relevant only when shader
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// generation is enabled. 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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public:
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virtual void output(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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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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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, make_default);
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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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