1 files changed, 311 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libANGLE/renderer/d3d/VertexBuffer.cpp b/src/3rdparty/angle/src/libANGLE/renderer/d3d/VertexBuffer.cpp
new file mode 100644
index 0000000000..19bd548fce
--- /dev/null
+++ b/src/3rdparty/angle/src/libANGLE/renderer/d3d/VertexBuffer.cpp
@@ -0,0 +1,311 @@
+//
+// Copyright (c) 2002-2012 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.
+//
+
+// VertexBuffer.cpp: Defines the abstract VertexBuffer class and VertexBufferInterface
+// class with derivations, classes that perform graphics API agnostic vertex buffer operations.
+
+#include "libANGLE/renderer/d3d/VertexBuffer.h"
+#include "libANGLE/renderer/d3d/BufferD3D.h"
+#include "libANGLE/renderer/d3d/RendererD3D.h"
+#include "libANGLE/VertexAttribute.h"
+
+#include "common/mathutil.h"
+
+namespace rx
+{
+
+unsigned int VertexBuffer::mNextSerial = 1;
+
+VertexBuffer::VertexBuffer()
+{
+    updateSerial();
+}
+
+VertexBuffer::~VertexBuffer()
+{
+}
+
+void VertexBuffer::updateSerial()
+{
+    mSerial = mNextSerial++;
+}
+
+unsigned int VertexBuffer::getSerial() const
+{
+    return mSerial;
+}
+
+VertexBufferInterface::VertexBufferInterface(BufferFactoryD3D *factory, bool dynamic)
+    : mFactory(factory)
+{
+    mDynamic = dynamic;
+    mWritePosition = 0;
+    mReservedSpace = 0;
+
+    mVertexBuffer = factory->createVertexBuffer();
+}
+
+VertexBufferInterface::~VertexBufferInterface()
+{
+    delete mVertexBuffer;
+}
+
+unsigned int VertexBufferInterface::getSerial() const
+{
+    return mVertexBuffer->getSerial();
+}
+
+unsigned int VertexBufferInterface::getBufferSize() const
+{
+    return mVertexBuffer->getBufferSize();
+}
+
+gl::Error VertexBufferInterface::setBufferSize(unsigned int size)
+{
+    if (mVertexBuffer->getBufferSize() == 0)
+    {
+        return mVertexBuffer->initialize(size, mDynamic);
+    }
+    else
+    {
+        return mVertexBuffer->setBufferSize(size);
+    }
+}
+
+unsigned int VertexBufferInterface::getWritePosition() const
+{
+    return mWritePosition;
+}
+
+void VertexBufferInterface::setWritePosition(unsigned int writePosition)
+{
+    mWritePosition = writePosition;
+}
+
+gl::Error VertexBufferInterface::discard()
+{
+    return mVertexBuffer->discard();
+}
+
+gl::Error VertexBufferInterface::storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData &currentValue,
+                                                       GLint start, GLsizei count, GLsizei instances, unsigned int *outStreamOffset)
+{
+    gl::Error error(GL_NO_ERROR);
+
+    unsigned int spaceRequired;
+    error = mVertexBuffer->getSpaceRequired(attrib, count, instances, &spaceRequired);
+    if (error.isError())
+    {
+        return error;
+    }
+
+    if (mWritePosition + spaceRequired < mWritePosition)
+    {
+        return gl::Error(GL_OUT_OF_MEMORY, "Internal error, new vertex buffer write position would overflow.");
+    }
+
+    error = reserveSpace(mReservedSpace);
+    if (error.isError())
+    {
+        return error;
+    }
+    mReservedSpace = 0;
+
+    error = mVertexBuffer->storeVertexAttributes(attrib, currentValue, start, count, instances, mWritePosition);
+    if (error.isError())
+    {
+        return error;
+    }
+
+    if (outStreamOffset)
+    {
+        *outStreamOffset = mWritePosition;
+    }
+
+    mWritePosition += spaceRequired;
+
+    // Align to 16-byte boundary
+    mWritePosition = roundUp(mWritePosition, 16u);
+
+    return gl::Error(GL_NO_ERROR);
+}
+
+gl::Error VertexBufferInterface::reserveVertexSpace(const gl::VertexAttribute &attrib, GLsizei count, GLsizei instances)
+{
+    gl::Error error(GL_NO_ERROR);
+
+    unsigned int requiredSpace;
+    error = mVertexBuffer->getSpaceRequired(attrib, count, instances, &requiredSpace);
+    if (error.isError())
+    {
+        return error;
+    }
+
+    // Protect against integer overflow
+    if (mReservedSpace + requiredSpace < mReservedSpace)
+    {
+        return gl::Error(GL_OUT_OF_MEMORY, "Unable to reserve %u extra bytes in internal vertex buffer, "
+                         "it would result in an overflow.", requiredSpace);
+    }
+
+    mReservedSpace += requiredSpace;
+
+    // Align to 16-byte boundary
+    mReservedSpace = roundUp(mReservedSpace, 16u);
+
+    return gl::Error(GL_NO_ERROR);
+}
+
+VertexBuffer* VertexBufferInterface::getVertexBuffer() const
+{
+    return mVertexBuffer;
+}
+
+bool VertexBufferInterface::directStoragePossible(const gl::VertexAttribute &attrib,
+                                                  const gl::VertexAttribCurrentValueData &currentValue) const
+{
+    gl::Buffer *buffer = attrib.buffer.get();
+    BufferD3D *storage = buffer ? GetImplAs<BufferD3D>(buffer) : NULL;
+
+    if (!storage || !storage->supportsDirectBinding())
+    {
+        return false;
+    }
+
+    // Alignment restrictions: In D3D, vertex data must be aligned to
+    //  the format stride, or to a 4-byte boundary, whichever is smaller.
+    //  (Undocumented, and experimentally confirmed)
+    size_t alignment = 4;
+    bool requiresConversion = false;
+
+    if (attrib.type != GL_FLOAT)
+    {
+        gl::VertexFormat vertexFormat(attrib, currentValue.Type);
+
+        unsigned int outputElementSize;
+        getVertexBuffer()->getSpaceRequired(attrib, 1, 0, &outputElementSize);
+        alignment = std::min<size_t>(outputElementSize, 4);
+
+        // TODO(jmadill): add VertexFormatCaps
+        requiresConversion = (mFactory->getVertexConversionType(vertexFormat) & VERTEX_CONVERT_CPU) != 0;
+    }
+
+    bool isAligned = (static_cast<size_t>(ComputeVertexAttributeStride(attrib)) % alignment == 0) &&
+                     (static_cast<size_t>(attrib.offset) % alignment == 0);
+
+    return !requiresConversion && isAligned;
+}
+
+StreamingVertexBufferInterface::StreamingVertexBufferInterface(BufferFactoryD3D *factory, std::size_t initialSize)
+    : VertexBufferInterface(factory, true)
+{
+    setBufferSize(initialSize);
+}
+
+StreamingVertexBufferInterface::~StreamingVertexBufferInterface()
+{
+}
+
+gl::Error StreamingVertexBufferInterface::reserveSpace(unsigned int size)
+{
+    unsigned int curBufferSize = getBufferSize();
+    if (size > curBufferSize)
+    {
+        gl::Error error = setBufferSize(std::max(size, 3 * curBufferSize / 2));
+        if (error.isError())
+        {
+            return error;
+        }
+        setWritePosition(0);
+    }
+    else if (getWritePosition() + size > curBufferSize)
+    {
+        gl::Error error = discard();
+        if (error.isError())
+        {
+            return error;
+        }
+        setWritePosition(0);
+    }
+
+    return gl::Error(GL_NO_ERROR);
+}
+
+StaticVertexBufferInterface::StaticVertexBufferInterface(BufferFactoryD3D *factory)
+    : VertexBufferInterface(factory, false)
+{
+}
+
+StaticVertexBufferInterface::~StaticVertexBufferInterface()
+{
+}
+
+bool StaticVertexBufferInterface::lookupAttribute(const gl::VertexAttribute &attrib, unsigned int *outStreamOffset)
+{
+    for (unsigned int element = 0; element < mCache.size(); element++)
+    {
+        if (mCache[element].type == attrib.type &&
+            mCache[element].size == attrib.size &&
+            mCache[element].stride == ComputeVertexAttributeStride(attrib) &&
+            mCache[element].normalized == attrib.normalized &&
+            mCache[element].pureInteger == attrib.pureInteger)
+        {
+            size_t offset = (static_cast<size_t>(attrib.offset) % ComputeVertexAttributeStride(attrib));
+            if (mCache[element].attributeOffset == offset)
+            {
+                if (outStreamOffset)
+                {
+                    *outStreamOffset = mCache[element].streamOffset;
+                }
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+gl::Error StaticVertexBufferInterface::reserveSpace(unsigned int size)
+{
+    unsigned int curSize = getBufferSize();
+    if (curSize == 0)
+    {
+        return setBufferSize(size);
+    }
+    else if (curSize >= size)
+    {
+        return gl::Error(GL_NO_ERROR);
+    }
+    else
+    {
+        UNREACHABLE();
+        return gl::Error(GL_INVALID_OPERATION, "Internal error, Static vertex buffers can't be resized.");
+    }
+}
+
+gl::Error StaticVertexBufferInterface::storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData &currentValue,
+                                                             GLint start, GLsizei count, GLsizei instances, unsigned int *outStreamOffset)
+{
+    unsigned int streamOffset;
+    gl::Error error = VertexBufferInterface::storeVertexAttributes(attrib, currentValue, start, count, instances, &streamOffset);
+    if (error.isError())
+    {
+        return error;
+    }
+
+    size_t attributeOffset = static_cast<size_t>(attrib.offset) % ComputeVertexAttributeStride(attrib);
+    VertexElement element = { attrib.type, attrib.size, static_cast<GLuint>(ComputeVertexAttributeStride(attrib)), attrib.normalized, attrib.pureInteger, attributeOffset, streamOffset };
+    mCache.push_back(element);
+
+    if (outStreamOffset)
+    {
+        *outStreamOffset = streamOffset;
+    }
+
+    return gl::Error(GL_NO_ERROR);
+}
+
+}