Import goldfish HAL sources from devices/generic/goldfish

We import all code here so we can customize and keep in sync with what
we do on the host side more easily.

android/opengl/system/OpenglSystemCommon/HostConnection.h

@@ -0,0 +1,61 @@
+/*
+* 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.
+*/
+#ifndef __COMMON_HOST_CONNECTION_H
+#define __COMMON_HOST_CONNECTION_H
+
+#include "IOStream.h"
+#include "renderControl_enc.h"
+#include "ChecksumCalculator.h"
+
+class GLEncoder;
+class gl_client_context_t;
+class GL2Encoder;
+class gl2_client_context_t;
+
+class HostConnection
+{
+public:
+    static HostConnection *get();
+    ~HostConnection();
+
+    GLEncoder *glEncoder();
+    GL2Encoder *gl2Encoder();
+    renderControl_encoder_context_t *rcEncoder();
+    ChecksumCalculator *checksumHelper() { return &m_checksumHelper; }
+
+    void flush() {
+        if (m_stream) {
+            m_stream->flush();
+        }
+    }
+
+private:
+    HostConnection();
+    static gl_client_context_t  *s_getGLContext();
+    static gl2_client_context_t *s_getGL2Context();
+    // setProtocol initilizes GL communication protocol for checksums
+    // should be called when m_rcEnc is created
+    void setChecksumHelper(renderControl_encoder_context_t *rcEnc);
+
+private:
+    IOStream *m_stream;
+    GLEncoder   *m_glEnc;
+    GL2Encoder  *m_gl2Enc;
+    renderControl_encoder_context_t *m_rcEnc;
+    ChecksumCalculator m_checksumHelper;
+};
+
+#endif