historical/toontown-classic.git/panda/include/auxBitplaneAttrib.h

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