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open_toontown_panda3d/panda/src/gobj/geomVertexArrayFormat.cxx

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// Filename: geomVertexArrayFormat.cxx
// Created by: drose (06Mar05)
//
////////////////////////////////////////////////////////////////////
//
// 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."
//
////////////////////////////////////////////////////////////////////
#include "geomVertexFormat.h"
#include "geomVertexColumn.h"
#include "geomVertexData.h"
#include "geomVertexReader.h"
#include "indent.h"
#include "bamReader.h"
#include "bamWriter.h"
#include "indirectLess.h"
#include "lightMutexHolder.h"
GeomVertexArrayFormat::Registry *GeomVertexArrayFormat::_registry = NULL;
TypeHandle GeomVertexArrayFormat::_type_handle;
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Constructor
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
GeomVertexArrayFormat::
GeomVertexArrayFormat() :
_is_registered(false),
_stride(0),
_total_bytes(0),
_pad_to(1),
_columns_unsorted(false)
{
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Constructor
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
GeomVertexArrayFormat::
GeomVertexArrayFormat(InternalName *name0, int num_components0,
GeomVertexArrayFormat::NumericType numeric_type0,
GeomVertexArrayFormat::Contents contents0) :
_is_registered(false),
_stride(0),
_total_bytes(0),
_pad_to(1),
_columns_unsorted(false)
{
add_column(name0, num_components0, numeric_type0, contents0);
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Constructor
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
GeomVertexArrayFormat::
GeomVertexArrayFormat(InternalName *name0, int num_components0,
GeomVertexArrayFormat::NumericType numeric_type0,
GeomVertexArrayFormat::Contents contents0,
InternalName *name1, int num_components1,
GeomVertexArrayFormat::NumericType numeric_type1,
GeomVertexArrayFormat::Contents contents1) :
_is_registered(false),
_stride(0),
_total_bytes(0),
_pad_to(1),
_columns_unsorted(false)
{
add_column(name0, num_components0, numeric_type0, contents0);
add_column(name1, num_components1, numeric_type1, contents1);
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Constructor
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
GeomVertexArrayFormat::
GeomVertexArrayFormat(InternalName *name0, int num_components0,
GeomVertexArrayFormat::NumericType numeric_type0,
GeomVertexArrayFormat::Contents contents0,
InternalName *name1, int num_components1,
GeomVertexArrayFormat::NumericType numeric_type1,
GeomVertexArrayFormat::Contents contents1,
InternalName *name2, int num_components2,
GeomVertexArrayFormat::NumericType numeric_type2,
GeomVertexArrayFormat::Contents contents2) :
_is_registered(false),
_stride(0),
_total_bytes(0),
_pad_to(1),
_columns_unsorted(false)
{
add_column(name0, num_components0, numeric_type0, contents0);
add_column(name1, num_components1, numeric_type1, contents1);
add_column(name2, num_components2, numeric_type2, contents2);
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Constructor
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
GeomVertexArrayFormat::
GeomVertexArrayFormat(InternalName *name0, int num_components0,
GeomVertexArrayFormat::NumericType numeric_type0,
GeomVertexArrayFormat::Contents contents0,
InternalName *name1, int num_components1,
GeomVertexArrayFormat::NumericType numeric_type1,
GeomVertexArrayFormat::Contents contents1,
InternalName *name2, int num_components2,
GeomVertexArrayFormat::NumericType numeric_type2,
GeomVertexArrayFormat::Contents contents2,
InternalName *name3, int num_components3,
GeomVertexArrayFormat::NumericType numeric_type3,
GeomVertexArrayFormat::Contents contents3) :
_is_registered(false),
_stride(0),
_total_bytes(0),
_pad_to(1),
_columns_unsorted(false)
{
add_column(name0, num_components0, numeric_type0, contents0);
add_column(name1, num_components1, numeric_type1, contents1);
add_column(name2, num_components2, numeric_type2, contents2);
add_column(name3, num_components3, numeric_type3, contents3);
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Copy Constructor
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
GeomVertexArrayFormat::
GeomVertexArrayFormat(const GeomVertexArrayFormat &copy) :
_is_registered(false),
_stride(copy._stride),
_total_bytes(copy._total_bytes),
_pad_to(copy._pad_to),
_columns_unsorted(copy._columns_unsorted)
{
Columns::const_iterator dti;
for (dti = copy._columns.begin(); dti != copy._columns.end(); ++dti) {
add_column(*(*dti));
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Copy Assignment Operator
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
operator = (const GeomVertexArrayFormat &copy) {
nassertv(!_is_registered);
_stride = copy._stride;
_total_bytes = copy._total_bytes;
_pad_to = copy._pad_to;
_columns.clear();
_columns_by_name.clear();
_columns_unsorted = false;
Columns::const_iterator dti;
for (dti = copy._columns.begin(); dti != copy._columns.end(); ++dti) {
add_column(*(*dti));
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Destructor
// Access: Published, Virtual
// Description:
////////////////////////////////////////////////////////////////////
GeomVertexArrayFormat::
~GeomVertexArrayFormat() {
// unref() should have unregistered us.
nassertv(!is_registered());
Columns::iterator ci;
for (ci = _columns.begin(); ci != _columns.end(); ++ci) {
delete (*ci);
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::unref
// Access: Published, Virtual
// Description: This method overrides ReferenceCount::unref() to
// unregister the object when its reference count goes
// to zero.
////////////////////////////////////////////////////////////////////
bool GeomVertexArrayFormat::
unref() const {
Registry *registry = get_registry();
LightMutexHolder holder(registry->_lock);
if (ReferenceCount::unref()) {
return true;
}
if (is_registered()) {
registry->unregister_format((GeomVertexArrayFormat *)this);
}
return false;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::add_column
// Access: Published
// Description: Adds a new column to the specification. This is a
// table of per-vertex floating-point numbers such as
// "vertex" or "normal"; you must specify where in each
// record the table starts, and how many components
// (dimensions) exist per vertex.
//
// The return value is the index number of the new data
// type.
////////////////////////////////////////////////////////////////////
int GeomVertexArrayFormat::
add_column(InternalName *name, int num_components,
GeomVertexArrayFormat::NumericType numeric_type,
GeomVertexArrayFormat::Contents contents, int start,
int column_alignment) {
if (start < 0) {
start = _total_bytes;
}
return add_column(GeomVertexColumn(name, num_components, numeric_type, contents,
start, column_alignment));
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::add_column
// Access: Published
// Description: Adds a new column to the specification. This is a
// table of per-vertex floating-point numbers such as
// "vertex" or "normal"; you must specify where in each
// record the table starts, and how many components
// (dimensions) exist per vertex.
//
// Adding a column with the same name as a previous
// type, or that overlaps with one or more previous
// types, quietly removes the previous type(s).
//
// The return value is the index number of the new data
// type.
////////////////////////////////////////////////////////////////////
int GeomVertexArrayFormat::
add_column(const GeomVertexColumn &column) {
nassertr(!_is_registered, -1);
// Make sure there isn't already a column with this name.
remove_column(column.get_name());
// Also make sure there aren't any columns that overlap with this
// one.
const GeomVertexColumn *orig_column = get_column(column.get_start(), column.get_total_bytes());
while (orig_column != (const GeomVertexColumn *)NULL) {
remove_column(orig_column->get_name());
orig_column = get_column(column.get_start(), column.get_total_bytes());
}
_total_bytes = max(_total_bytes, column.get_start() + column.get_total_bytes());
_pad_to = max(_pad_to, column.get_column_alignment());
_stride = max(_stride, _total_bytes);
if (_pad_to > 1) {
_stride = ((_stride + _pad_to - 1) / _pad_to) * _pad_to;
}
GeomVertexColumn *new_column = new GeomVertexColumn(column);
if (!_columns.empty() && *new_column < *_columns.back()) {
_columns_unsorted = true;
}
int new_index = (int)_columns.size();
_columns.push_back(new_column);
_columns_by_name.insert(ColumnsByName::value_type(new_column->get_name(), new_column));
return new_index;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::remove_column
// Access: Published
// Description: Removes the column with the indicated name, if
// any. This leaves a gap in the byte structure.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
remove_column(const InternalName *name) {
nassertv(!_is_registered);
ColumnsByName::iterator ni;
ni = _columns_by_name.find(name);
if (ni != _columns_by_name.end()) {
GeomVertexColumn *column = (*ni).second;
_columns_by_name.erase(ni);
Columns::iterator ci;
ci = find(_columns.begin(), _columns.end(), column);
nassertv(ci != _columns.end());
_columns.erase(ci);
delete column;
// Maybe we just removed the tail column. If that's so, we
// should recompute _total_bytes to reflect the new tail.
if (_columns.empty()) {
_total_bytes = 0;
} else {
consider_sort_columns();
GeomVertexColumn *last = _columns.back();
_total_bytes = last->get_start() + last->get_total_bytes();
}
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::clear_columns
// Access: Published
// Description: Removes all columns previously added, sets the
// stride to zero, and prepares to start over.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
clear_columns() {
nassertv(!_is_registered);
_columns.clear();
_columns_by_name.clear();
_columns_unsorted = false;
_stride = 0;
_total_bytes = 0;
_pad_to = 1;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::pack_columns
// Access: Published
// Description: Removes wasted space between columns.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
pack_columns() {
nassertv(!_is_registered);
Columns orig_columns;
orig_columns.swap(_columns);
clear_columns();
Columns::const_iterator ci;
for (ci = orig_columns.begin(); ci != orig_columns.end(); ++ci) {
GeomVertexColumn *column = (*ci);
add_column(column->get_name(), column->get_num_components(),
column->get_numeric_type(), column->get_contents());
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::align_columns_for_animation
// Access: Published
// Description: Reprocesses the columns in the format to align the
// C_point and C_vector columns to 16-byte boundaries to
// allow for the more efficient SSE2 operations
// (assuming SSE2 is enabled in the build).
//
// The caller is responsible for testing
// vertex_animation_align_16 to decide whether to call
// this method.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
align_columns_for_animation() {
nassertv(!_is_registered);
Columns orig_columns;
orig_columns.swap(_columns);
clear_columns();
Columns::const_iterator ci;
for (ci = orig_columns.begin(); ci != orig_columns.end(); ++ci) {
GeomVertexColumn *column = (*ci);
if ((column->get_contents() == C_point || column->get_contents() == C_vector) &&
(column->get_numeric_type() == NT_float32 || column->get_numeric_type() == NT_float64) &&
column->get_num_components() >= 3) {
add_column(column->get_name(), 4, column->get_numeric_type(), column->get_contents(), -1, 16);
} else {
add_column(column->get_name(), column->get_num_components(),
column->get_numeric_type(), column->get_contents());
}
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::get_column
// Access: Published
// Description: Returns the specification with the indicated name, or
// NULL if the name is not used.
////////////////////////////////////////////////////////////////////
const GeomVertexColumn *GeomVertexArrayFormat::
get_column(const InternalName *name) const {
ColumnsByName::const_iterator ni;
ni = _columns_by_name.find(name);
if (ni != _columns_by_name.end()) {
return (*ni).second;
}
return NULL;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::get_column
// Access: Published
// Description: Returns the first specification that overlaps with
// any of the indicated bytes in the range, or NULL if
// none do.
////////////////////////////////////////////////////////////////////
const GeomVertexColumn *GeomVertexArrayFormat::
get_column(int start_byte, int num_bytes) const {
consider_sort_columns();
Columns::const_iterator ci;
for (ci = _columns.begin(); ci != _columns.end(); ++ci) {
const GeomVertexColumn *column = (*ci);
if (column->overlaps_with(start_byte, num_bytes)) {
return column;
}
}
return NULL;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::is_data_subset_of
// Access: Published
// Description: Returns true if all of the fields in this array
// format are also present and equivalent in the other
// array format, and in the same byte positions, and the
// stride is the same. That is, true if this format can
// share the same data pointer as the other format (with
// possibly some unused gaps).
////////////////////////////////////////////////////////////////////
bool GeomVertexArrayFormat::
is_data_subset_of(const GeomVertexArrayFormat &other) const {
if (_columns.size() > other._columns.size() ||
get_stride() != other.get_stride()) {
return false;
}
consider_sort_columns();
other.consider_sort_columns();
size_t i = 0;
size_t j = 0;
while (i < _columns.size() && j < other._columns.size()) {
if (*_columns[i] == *other._columns[j]) {
++i;
}
++j;
}
// If we reached the end of our list, all fields matched.
return (i == _columns.size());
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::count_unused_space
// Access: Published
// Description: Returns the number of bytes per row that are not
// assigned to any column.
////////////////////////////////////////////////////////////////////
int GeomVertexArrayFormat::
count_unused_space() const {
consider_sort_columns();
int unused_space = 0;
int last_pos = 0;
Columns::const_iterator ci;
for (ci = _columns.begin(); ci != _columns.end(); ++ci) {
const GeomVertexColumn *column = (*ci);
if (column->get_start() > last_pos) {
unused_space += (column->get_start() - last_pos);
}
last_pos = column->get_start() + column->get_total_bytes();
}
if (_stride > last_pos) {
unused_space += (_stride - last_pos);
}
return unused_space;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::output
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
output(ostream &out) const {
Columns::const_iterator ci;
int last_pos = 0;
out << "[";
for (ci = _columns.begin(); ci != _columns.end(); ++ci) {
const GeomVertexColumn *column = (*ci);
if (column->get_start() > last_pos) {
out << " (..." << (column->get_start() - last_pos) << "...)";
}
out << " " << *column;
last_pos = column->get_start() + column->get_total_bytes();
}
if (_stride > last_pos) {
out << " ..." << (_stride - last_pos) << "...";
}
out << " ]";
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::write
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
write(ostream &out, int indent_level) const {
indent(out, indent_level)
<< "Array format (stride = " << get_stride() << "):\n";
consider_sort_columns();
Columns::const_iterator ci;
for (ci = _columns.begin(); ci != _columns.end(); ++ci) {
const GeomVertexColumn *column = (*ci);
indent(out, indent_level + 2)
<< *column
<< " " << column->get_numeric_type()
<< " " << column->get_contents()
<< " start at " << column->get_start() << "\n";
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::write_with_data
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
write_with_data(ostream &out, int indent_level,
const GeomVertexArrayData *array_data) const {
consider_sort_columns();
int num_rows = array_data->get_num_rows();
GeomVertexReader reader(array_data);
for (int i = 0; i < num_rows; i++) {
indent(out, indent_level)
<< "row " << i << ":\n";
reader.set_row_unsafe(i);
Columns::const_iterator ci;
for (ci = _columns.begin(); ci != _columns.end(); ++ci) {
const GeomVertexColumn *column = (*ci);
int num_values = min(column->get_num_values(), 4);
reader.set_column(0, column);
const LVecBase4f &d = reader.get_data4f();
indent(out, indent_level + 2)
<< *column->get_name();
for (int v = 0; v < num_values; v++) {
out << " " << d[v];
}
out << "\n";
}
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::compare_to
// Access: Public
// Description:
////////////////////////////////////////////////////////////////////
int GeomVertexArrayFormat::
compare_to(const GeomVertexArrayFormat &other) const {
if (_stride != other._stride) {
return _stride - other._stride;
}
if (_total_bytes != other._total_bytes) {
return _total_bytes - other._total_bytes;
}
if (_pad_to != other._pad_to) {
return _pad_to - other._pad_to;
}
if (_columns.size() != other._columns.size()) {
return (int)_columns.size() - (int)other._columns.size();
}
consider_sort_columns();
other.consider_sort_columns();
for (size_t i = 0; i < _columns.size(); i++) {
int compare = _columns[i]->compare_to(*other._columns[i]);
if (compare != 0) {
return compare;
}
}
return 0;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::sort_columns
// Access: Private
// Description: Resorts the _columns vector so that the columns
// are listed in the same order they appear in the
// record.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
sort_columns() {
sort(_columns.begin(), _columns.end(), IndirectLess<GeomVertexColumn>());
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::make_registry
// Access: Private
// Description: Returns the global registry object.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
make_registry() {
if (_registry == (Registry *)NULL) {
_registry = new Registry;
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::do_register
// Access: Private
// Description: Called internally when the format is registered.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
do_register() {
nassertv(!_is_registered);
_is_registered = true;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::do_unregister
// Access: Private
// Description: Called internally when the format is unregistered.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
do_unregister() {
nassertv(_is_registered);
_is_registered = false;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::register_with_read_factory
// Access: Public, Static
// Description: Tells the BamReader how to create objects of type
// GeomVertexArrayFormat.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
register_with_read_factory() {
BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::write_datagram
// Access: Public, Virtual
// Description: Writes the contents of this object to the datagram
// for shipping out to a Bam file.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
write_datagram(BamWriter *manager, Datagram &dg) {
TypedWritableReferenceCount::write_datagram(manager, dg);
dg.add_uint16(_stride);
dg.add_uint16(_total_bytes);
dg.add_uint8(_pad_to);
consider_sort_columns();
dg.add_uint16(_columns.size());
Columns::iterator ci;
for (ci = _columns.begin(); ci != _columns.end(); ++ci) {
GeomVertexColumn *column = (*ci);
column->write_datagram(manager, dg);
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::complete_pointers
// Access: Public, Virtual
// Description: Receives an array of pointers, one for each time
// manager->read_pointer() was called in fillin().
// Returns the number of pointers processed.
////////////////////////////////////////////////////////////////////
int GeomVertexArrayFormat::
complete_pointers(TypedWritable **p_list, BamReader *manager) {
int pi = TypedWritableReferenceCount::complete_pointers(p_list, manager);
Columns::iterator ci;
for (ci = _columns.begin(); ci != _columns.end(); ++ci) {
GeomVertexColumn *column = (*ci);
pi += column->complete_pointers(p_list + pi, manager);
}
return pi;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::finalize
// Access: Public, Virtual
// Description: Called by the BamReader to perform any final actions
// needed for setting up the object after all objects
// have been read and all pointers have been completed.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
finalize(BamReader *manager) {
// Now we can build up the _columns_by_name index. We have to wait
// until finalize(), since the index is based on the nested name
// pointer within each column, which might not be available at the
// time complete_pointers() is called.
_columns_by_name.clear();
Columns::iterator ci;
for (ci = _columns.begin(); ci != _columns.end(); ++ci) {
GeomVertexColumn *column = (*ci);
_columns_by_name.insert(ColumnsByName::value_type(column->get_name(), column));
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::make_from_bam
// Access: Protected, Static
// Description: This function is called by the BamReader's factory
// when a new object of type GeomVertexArrayFormat is
// encountered in the Bam file. It should create the
// GeomVertexArrayFormat and extract its information
// from the file.
////////////////////////////////////////////////////////////////////
TypedWritable *GeomVertexArrayFormat::
make_from_bam(const FactoryParams &params) {
GeomVertexArrayFormat *object = new GeomVertexArrayFormat;
DatagramIterator scan;
BamReader *manager;
parse_params(params, scan, manager);
object->fillin(scan, manager);
manager->register_finalize(object);
return object;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::fillin
// Access: Protected
// Description: This internal function is called by make_from_bam to
// read in all of the relevant data from the BamFile for
// the new GeomVertexArrayFormat.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::
fillin(DatagramIterator &scan, BamReader *manager) {
TypedWritableReferenceCount::fillin(scan, manager);
nassertv(!_is_registered);
_stride = scan.get_uint16();
_total_bytes = scan.get_uint16();
_pad_to = scan.get_uint8();
int num_columns = scan.get_uint16();
_columns.reserve(num_columns);
for (int i = 0; i < num_columns; ++i) {
GeomVertexColumn *column = new GeomVertexColumn;
column->fillin(scan, manager);
_columns.push_back(column);
}
_columns_unsorted = false;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Registry::Constructor
// Access: Public
// Description:
////////////////////////////////////////////////////////////////////
GeomVertexArrayFormat::Registry::
Registry() {
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Registry::register_format
// Access: Public
// Description: Adds the indicated format to the registry, if there
// is not an equivalent format already there; in either
// case, returns the pointer to the equivalent format
// now in the registry.
//
// This must be called before a format may be used in a
// Geom. After this call, you should discard the
// original pointer you passed in (which may or may not
// now be invalid) and let its reference count decrement
// normally; you should use only the returned value from
// this point on.
////////////////////////////////////////////////////////////////////
CPT(GeomVertexArrayFormat) GeomVertexArrayFormat::Registry::
register_format(GeomVertexArrayFormat *format) {
if (format->is_registered()) {
return format;
}
// Save the incoming pointer in a local PointerTo, so that if it has
// a zero reference count and is not added into the map below, it
// will be automatically deleted when this function returns.
PT(GeomVertexArrayFormat) pt_format = format;
GeomVertexArrayFormat *new_format;
{
LightMutexHolder holder(_lock);
ArrayFormats::iterator fi = _formats.insert(format).first;
new_format = (*fi);
if (!new_format->is_registered()) {
new_format->do_register();
}
}
return new_format;
}
////////////////////////////////////////////////////////////////////
// Function: GeomVertexArrayFormat::Registry::unregister_format
// Access: Public
// Description: Removes the indicated format from the registry.
// Normally this should not be done until the format is
// destructing.
//
// The lock should be held prior to calling this method.
////////////////////////////////////////////////////////////////////
void GeomVertexArrayFormat::Registry::
unregister_format(GeomVertexArrayFormat *format) {
nassertv(format->is_registered());
ArrayFormats::iterator fi = _formats.find(format);
nassertv(fi != _formats.end());
_formats.erase(fi);
format->do_unregister();
}
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