d8223ffa75
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!
(cherry picked from commit c7bc44d5ad)
274 lines
7.2 KiB
C++
274 lines
7.2 KiB
C++
/*************************************************************************/
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/* packet_peer.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "packet_peer.h"
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#include "io/marshalls.h"
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#include "globals.h"
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/* helpers / binders */
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PacketPeer::PacketPeer() {
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last_get_error=OK;
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}
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Error PacketPeer::get_packet_buffer(DVector<uint8_t> &r_buffer) const {
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const uint8_t *buffer;
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int buffer_size;
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Error err = get_packet(&buffer,buffer_size);
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if (err)
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return err;
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r_buffer.resize(buffer_size);
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if (buffer_size==0)
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return OK;
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DVector<uint8_t>::Write w = r_buffer.write();
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for(int i=0;i<buffer_size;i++)
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w[i]=buffer[i];
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return OK;
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}
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Error PacketPeer::put_packet_buffer(const DVector<uint8_t> &p_buffer) {
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int len = p_buffer.size();
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if (len==0)
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return OK;
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DVector<uint8_t>::Read r = p_buffer.read();
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return put_packet(&r[0],len);
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}
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Error PacketPeer::get_var(Variant &r_variant) const {
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const uint8_t *buffer;
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int buffer_size;
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Error err = get_packet(&buffer,buffer_size);
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if (err)
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return err;
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return decode_variant(r_variant,buffer,buffer_size);
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}
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Error PacketPeer::put_var(const Variant& p_packet) {
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int len;
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Error err = encode_variant(p_packet,NULL,len); // compute len first
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if (err)
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return err;
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if (len==0)
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return OK;
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uint8_t *buf = (uint8_t*)alloca(len);
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ERR_FAIL_COND_V(!buf,ERR_OUT_OF_MEMORY);
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err = encode_variant(p_packet,buf,len);
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ERR_FAIL_COND_V(err, err);
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return put_packet(buf, len);
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}
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Variant PacketPeer::_bnd_get_var() const {
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Variant var;
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get_var(var);
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return var;
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};
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Error PacketPeer::_put_packet(const DVector<uint8_t> &p_buffer) {
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return put_packet_buffer(p_buffer);
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}
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DVector<uint8_t> PacketPeer::_get_packet() const {
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DVector<uint8_t> raw;
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last_get_error=get_packet_buffer(raw);
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return raw;
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}
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Error PacketPeer::_get_packet_error() const {
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return last_get_error;
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}
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void PacketPeer::_bind_methods() {
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ObjectTypeDB::bind_method(_MD("get_var:Variant"),&PacketPeer::_bnd_get_var);
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ObjectTypeDB::bind_method(_MD("put_var", "var:Variant"),&PacketPeer::put_var);
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ObjectTypeDB::bind_method(_MD("get_packet"),&PacketPeer::_get_packet);
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ObjectTypeDB::bind_method(_MD("put_packet:Error", "buffer"),&PacketPeer::_put_packet);
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ObjectTypeDB::bind_method(_MD("get_packet_error:Error"),&PacketPeer::_get_packet_error);
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ObjectTypeDB::bind_method(_MD("get_available_packet_count"),&PacketPeer::get_available_packet_count);
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};
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/***************/
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void PacketPeerStream::_set_stream_peer(REF p_peer) {
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ERR_FAIL_COND(p_peer.is_null());
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set_stream_peer(p_peer);
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}
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void PacketPeerStream::_bind_methods() {
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ObjectTypeDB::bind_method(_MD("set_stream_peer","peer:StreamPeer"),&PacketPeerStream::_set_stream_peer);
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}
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Error PacketPeerStream::_poll_buffer() const {
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ERR_FAIL_COND_V(peer.is_null(),ERR_UNCONFIGURED);
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int read = 0;
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Error err = peer->get_partial_data(&temp_buffer[0], ring_buffer.space_left(), read);
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if (err)
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return err;
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if (read==0)
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return OK;
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int w = ring_buffer.write(&temp_buffer[0],read);
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ERR_FAIL_COND_V(w!=read,ERR_BUG);
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return OK;
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}
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int PacketPeerStream::get_available_packet_count() const {
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_poll_buffer();
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uint32_t remaining = ring_buffer.data_left();
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int ofs=0;
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int count=0;
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while(remaining>=4) {
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uint8_t lbuf[4];
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ring_buffer.copy(lbuf,ofs,4);
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uint32_t len = decode_uint32(lbuf);
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remaining-=4;
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ofs+=4;
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if (len>remaining)
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break;
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remaining-=len;
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ofs+=len;
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count++;
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}
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return count;
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}
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Error PacketPeerStream::get_packet(const uint8_t **r_buffer,int &r_buffer_size) const {
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ERR_FAIL_COND_V(peer.is_null(),ERR_UNCONFIGURED);
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_poll_buffer();
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int remaining = ring_buffer.data_left();
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ERR_FAIL_COND_V(remaining<4,ERR_UNAVAILABLE);
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uint8_t lbuf[4];
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ring_buffer.copy(lbuf,0,4);
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remaining-=4;
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uint32_t len = decode_uint32(lbuf);
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ERR_FAIL_COND_V(remaining<(int)len,ERR_UNAVAILABLE);
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ring_buffer.read(lbuf,4); //get rid of first 4 bytes
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ring_buffer.read(&temp_buffer[0],len); // read packet
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*r_buffer=&temp_buffer[0];
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r_buffer_size=len;
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return OK;
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}
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Error PacketPeerStream::put_packet(const uint8_t *p_buffer,int p_buffer_size) {
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ERR_FAIL_COND_V(peer.is_null(),ERR_UNCONFIGURED);
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Error err = _poll_buffer(); //won't hurt to poll here too
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if (err)
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return err;
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if (p_buffer_size==0)
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return OK;
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ERR_FAIL_COND_V( p_buffer_size<0, ERR_INVALID_PARAMETER);
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ERR_FAIL_COND_V( p_buffer_size+4 > temp_buffer.size(), ERR_INVALID_PARAMETER );
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encode_uint32(p_buffer_size,&temp_buffer[0]);
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uint8_t *dst=&temp_buffer[4];
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for(int i=0;i<p_buffer_size;i++)
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dst[i]=p_buffer[i];
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return peer->put_data(&temp_buffer[0],p_buffer_size+4);
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}
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int PacketPeerStream::get_max_packet_size() const {
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return temp_buffer.size();
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}
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void PacketPeerStream::set_stream_peer(const Ref<StreamPeer> &p_peer) {
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//ERR_FAIL_COND(p_peer.is_null());
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if (p_peer.ptr() != peer.ptr()) {
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ring_buffer.advance_read(ring_buffer.data_left()); // reset the ring buffer
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};
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peer=p_peer;
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}
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void PacketPeerStream::set_input_buffer_max_size(int p_max_size) {
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//warning may lose packets
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ERR_EXPLAIN("Buffer in use, resizing would cause loss of data");
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ERR_FAIL_COND(ring_buffer.data_left());
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ring_buffer.resize(nearest_shift(p_max_size+4));
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temp_buffer.resize(nearest_power_of_2(p_max_size+4));
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}
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PacketPeerStream::PacketPeerStream() {
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int rbsize=GLOBAL_DEF( "core/packet_stream_peer_max_buffer_po2",(16));
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ring_buffer.resize(rbsize);
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temp_buffer.resize(1<<rbsize);
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}
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