Move emulator GLES from development.git to sdk.git

The emulator GLES support has two interfaces: a host shared library
interface used by QEMU, and a protocol between the platform and the
host. The host library interface is not versioned; QEMU and the GLES
renderer must match. The protocol on the other hand must be backwards
compatible: a new GLES renderer must support an older platform image.

Thus for branching purposes it makes more sense to put the GLES
renderer in sdk.git, which is branched along with qemu.git for SDK
releases. Platform images will be built against the protocol version
in the platform branch of sdk.git.

Change-Id: I2c3bce627ecfd0a4b3e688d1839fe10755a21e58

1 files changed, 73 insertions, 0 deletions

diff --git a/emulator/opengl/host/libs/libOpenglRender/ReadBuffer.cpp b/emulator/opengl/host/libs/libOpenglRender/ReadBuffer.cpp
new file mode 100644
index 000000000..837b0943b
--- /dev/null
+++ b/emulator/opengl/host/libs/libOpenglRender/ReadBuffer.cpp
@@ -0,0 +1,73 @@
+/*
+* 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 "ReadBuffer.h"
+#include <string.h>
+#include <assert.h>
+#include <limits.h>
+#include "ErrorLog.h"
+
+ReadBuffer::ReadBuffer(IOStream *stream, size_t bufsize)
+{
+    m_size = bufsize;
+    m_stream = stream;
+    m_buf = (unsigned char*)malloc(m_size*sizeof(unsigned char));
+    m_validData = 0;
+    m_readPtr = m_buf;
+}
+
+ReadBuffer::~ReadBuffer()
+{
+    free(m_buf);
+}
+
+int ReadBuffer::getData()
+{
+    if ((m_validData > 0) && (m_readPtr > m_buf)) {
+        memmove(m_buf, m_readPtr, m_validData);
+    }
+    // get fresh data into the buffer;
+    size_t len = m_size - m_validData;
+    if (len==0) {
+        //we need to inc our buffer
+        size_t new_size = m_size*2;
+        unsigned char* new_buf;
+        if (new_size < m_size) { // overflow check
+            new_size = INT_MAX;
+        }
+
+        new_buf = (unsigned char*)realloc(m_buf, new_size);
+        if (!new_buf) {
+            ERR("Failed to alloc %zu bytes for ReadBuffer\n", new_size);
+            return -1;
+        }
+        m_size = new_size;
+        m_buf  = new_buf;
+        len    = m_size - m_validData;
+    }
+    m_readPtr = m_buf;
+    if (NULL != m_stream->read(m_buf + m_validData, &len)) {
+        m_validData += len;
+        return len;
+    }
+    return -1;
+}
+
+void ReadBuffer::consume(size_t amount)
+{
+    assert(amount <= m_validData);
+    m_validData -= amount;
+    m_readPtr += amount;
+}