historical/toontown-classic.git/panda/include/transparencyAttrib.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 transparencyAttrib.h
* @author drose
* @date 2002-02-28
*/
#ifndef TRANSPARENCYATTRIB_H
#define TRANSPARENCYATTRIB_H
#include "pandabase.h"
#include "renderAttrib.h"
class FactoryParams;
/**
* This controls the enabling of transparency. Simply setting an alpha
* component to non-1 does not in itself make an object transparent; you must
* also enable transparency mode with a suitable TransparencyAttrib.
* Similarly, it is wasteful to render an object with a TransparencyAttrib in
* effect unless you actually want it to be at least partially transparent
* (and it has alpha components less than 1).
*/
class EXPCL_PANDA_PGRAPH TransparencyAttrib : public RenderAttrib {
PUBLISHED:
enum Mode {
// The first two should be specifically 0 and 1, for historical reasons
// (NodePath::set_transparency() used to accept a boolean value, which
// corresponded to M_none or M_alpha).
M_none = 0, // No transparency.
M_alpha = 1, // Normal transparency, panda will sort back-to-front.
M_premultiplied_alpha, // Assume textures use premultiplied alpha.
M_multisample, // Uses ms buffer, alpha values modified to 1.0.
M_multisample_mask, // Uses ms buffer, alpha values not modified.
M_binary, // Only writes pixels with alpha >= 0.5.
M_dual, // opaque parts first, then sorted transparent parts.
};
private:
INLINE TransparencyAttrib(Mode mode = M_none);
PUBLISHED:
static CPT(RenderAttrib) make(Mode mode);
static CPT(RenderAttrib) make_default();
INLINE Mode get_mode() const;
MAKE_PROPERTY(mode, get_mode);
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:
Mode _mode;
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, "TransparencyAttrib",
RenderAttrib::get_class_type());
_attrib_slot = register_slot(_type_handle, 100, new TransparencyAttrib);
}
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 "transparencyAttrib.I"
#endif