1 files changed, 187 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/Buffer.cpp b/gfx/angle/src/libANGLE/Buffer.cpp
new file mode 100755
index 000000000..c69d1c671
--- /dev/null
+++ b/gfx/angle/src/libANGLE/Buffer.cpp
@@ -0,0 +1,187 @@
+//
+// Copyright (c) 2002-2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// Buffer.cpp: Implements the gl::Buffer class, representing storage of vertex and/or
+// index data. Implements GL buffer objects and related functionality.
+// [OpenGL ES 2.0.24] section 2.9 page 21.
+
+#include "libANGLE/Buffer.h"
+#include "libANGLE/renderer/BufferImpl.h"
+#include "libANGLE/renderer/GLImplFactory.h"
+
+namespace gl
+{
+
+BufferState::BufferState()
+    : mLabel(),
+      mUsage(GL_STATIC_DRAW),
+      mSize(0),
+      mAccessFlags(0),
+      mAccess(GL_WRITE_ONLY_OES),
+      mMapped(GL_FALSE),
+      mMapPointer(nullptr),
+      mMapOffset(0),
+      mMapLength(0)
+{
+}
+
+BufferState::~BufferState()
+{
+}
+
+Buffer::Buffer(rx::GLImplFactory *factory, GLuint id)
+    : RefCountObject(id), mImpl(factory->createBuffer(mState))
+{
+}
+
+Buffer::~Buffer()
+{
+    SafeDelete(mImpl);
+}
+
+void Buffer::setLabel(const std::string &label)
+{
+    mState.mLabel = label;
+}
+
+const std::string &Buffer::getLabel() const
+{
+    return mState.mLabel;
+}
+
+Error Buffer::bufferData(GLenum target, const void *data, GLsizeiptr size, GLenum usage)
+{
+    ANGLE_TRY(mImpl->setData(target, data, size, usage));
+
+    mIndexRangeCache.clear();
+    mState.mUsage = usage;
+    mState.mSize  = size;
+
+    return NoError();
+}
+
+Error Buffer::bufferSubData(GLenum target, const void *data, GLsizeiptr size, GLintptr offset)
+{
+    ANGLE_TRY(mImpl->setSubData(target, data, size, offset));
+
+    mIndexRangeCache.invalidateRange(static_cast<unsigned int>(offset), static_cast<unsigned int>(size));
+
+    return NoError();
+}
+
+Error Buffer::copyBufferSubData(Buffer* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size)
+{
+    ANGLE_TRY(mImpl->copySubData(source->getImplementation(), sourceOffset, destOffset, size));
+
+    mIndexRangeCache.invalidateRange(static_cast<unsigned int>(destOffset), static_cast<unsigned int>(size));
+
+    return NoError();
+}
+
+Error Buffer::map(GLenum access)
+{
+    ASSERT(!mState.mMapped);
+
+    Error error = mImpl->map(access, &mState.mMapPointer);
+    if (error.isError())
+    {
+        mState.mMapPointer = nullptr;
+        return error;
+    }
+
+    ASSERT(access == GL_WRITE_ONLY_OES);
+
+    mState.mMapped      = GL_TRUE;
+    mState.mMapOffset   = 0;
+    mState.mMapLength   = mState.mSize;
+    mState.mAccess      = access;
+    mState.mAccessFlags = GL_MAP_WRITE_BIT;
+    mIndexRangeCache.clear();
+
+    return error;
+}
+
+Error Buffer::mapRange(GLintptr offset, GLsizeiptr length, GLbitfield access)
+{
+    ASSERT(!mState.mMapped);
+    ASSERT(offset + length <= mState.mSize);
+
+    Error error = mImpl->mapRange(offset, length, access, &mState.mMapPointer);
+    if (error.isError())
+    {
+        mState.mMapPointer = nullptr;
+        return error;
+    }
+
+    mState.mMapped      = GL_TRUE;
+    mState.mMapOffset   = static_cast<GLint64>(offset);
+    mState.mMapLength   = static_cast<GLint64>(length);
+    mState.mAccess      = GL_WRITE_ONLY_OES;
+    mState.mAccessFlags = access;
+
+    // The OES_mapbuffer extension states that GL_WRITE_ONLY_OES is the only valid
+    // value for GL_BUFFER_ACCESS_OES because it was written against ES2.  Since there is
+    // no update for ES3 and the GL_READ_ONLY and GL_READ_WRITE enums don't exist for ES,
+    // we cannot properly set GL_BUFFER_ACCESS_OES when glMapBufferRange is called.
+
+    if ((access & GL_MAP_WRITE_BIT) > 0)
+    {
+        mIndexRangeCache.invalidateRange(static_cast<unsigned int>(offset), static_cast<unsigned int>(length));
+    }
+
+    return error;
+}
+
+Error Buffer::unmap(GLboolean *result)
+{
+    ASSERT(mState.mMapped);
+
+    Error error = mImpl->unmap(result);
+    if (error.isError())
+    {
+        *result = GL_FALSE;
+        return error;
+    }
+
+    mState.mMapped      = GL_FALSE;
+    mState.mMapPointer  = nullptr;
+    mState.mMapOffset   = 0;
+    mState.mMapLength   = 0;
+    mState.mAccess      = GL_WRITE_ONLY_OES;
+    mState.mAccessFlags = 0;
+
+    return error;
+}
+
+void Buffer::onTransformFeedback()
+{
+    mIndexRangeCache.clear();
+}
+
+void Buffer::onPixelUnpack()
+{
+    mIndexRangeCache.clear();
+}
+
+Error Buffer::getIndexRange(GLenum type,
+                            size_t offset,
+                            size_t count,
+                            bool primitiveRestartEnabled,
+                            IndexRange *outRange) const
+{
+    if (mIndexRangeCache.findRange(type, offset, count, primitiveRestartEnabled, outRange))
+    {
+        return NoError();
+    }
+
+    ANGLE_TRY(mImpl->getIndexRange(type, offset, count, primitiveRestartEnabled, outRange));
+
+    mIndexRangeCache.addRange(type, offset, count, primitiveRestartEnabled, *outRange);
+
+    return NoError();
+}
+
+}  // namespace gl