emulator opengl: OpenglSystemCommon library shared between gralloc/EGL/GLES.

This is a static library of utilities shared between the emulator opengl
system components, gralloc, EGL, GLES. In includes host connection functionality
and access to OpenGL TLS info.

Change-Id: Ic63a6f7384a2035308ca6d316c747f0e6c6f2ef3

tools/emulator/opengl/system/OpenglSystemCommon/HostConnection.cpp

@@ -0,0 +1,100 @@
+/*
+* Copyright (C) 2011 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+#include "HostConnection.h"
+#include "TcpStream.h"
+#include "ThreadInfo.h"
+#include <cutils/log.h>
+
+#define STREAM_BUFFER_SIZE  4*1024*1024
+#define STREAM_PORT_NUM     4141
+
+HostConnection::HostConnection() :
+    m_stream(NULL),
+    m_glEnc(NULL),
+    m_rcEnc(NULL)
+{
+}
+
+HostConnection::~HostConnection()
+{
+    delete m_stream;
+    delete m_glEnc;
+    delete m_rcEnc;
+}
+
+HostConnection *HostConnection::get()
+{
+    // Get thread info
+    EGLThreadInfo *tinfo = getEGLThreadInfo();
+    if (!tinfo) {
+        return NULL;
+    }
+
+    //
+    // create new host connection for that thread if needed
+    //
+    if (tinfo->hostConn == NULL) {
+        HostConnection *con = new HostConnection();
+        if (NULL == con) {
+            return NULL;
+        }
+
+        TcpStream *stream = new TcpStream(STREAM_BUFFER_SIZE);
+        if (!stream) {
+            LOGE("Failed to create TcpStream for host connection!!!\n");
+            delete con;
+            return NULL;
+        }
+
+        if (stream->connect("10.0.2.2", STREAM_PORT_NUM) < 0) {
+            LOGE("Failed to connect to host !!!\n");
+            delete con;
+            return NULL;
+        }
+        LOGD("Host Connection established \n");
+
+        con->m_stream = stream;
+        tinfo->hostConn = con;
+    }
+
+    return tinfo->hostConn;
+}
+
+GLEncoder *HostConnection::glEncoder()
+{
+    if (!m_glEnc) {
+        m_glEnc = new GLEncoder(m_stream);
+        m_glEnc->setContextAccessor(s_getGLContext);
+    }
+    return m_glEnc;
+}
+
+renderControl_encoder_context_t *HostConnection::rcEncoder()
+{
+    if (!m_rcEnc) {
+        m_rcEnc = new renderControl_encoder_context_t(m_stream);
+    }
+    return m_rcEnc;
+}
+
+gl_client_context_t *HostConnection::s_getGLContext()
+{
+    EGLThreadInfo *ti = getEGLThreadInfo();
+    if (ti->hostConn) {
+        return ti->hostConn->m_glEnc;
+    }
+    return NULL;
+}