/**
* Attach the allocated memory block to the buffer
*
* @param offset (Optional) Byte offset (from the beginning) for the memory region to bind
*
* @return VkResult of the bindBufferMemory call
*/
Result bind(ulong offset = 0)
{
return(mBuffer.BindBufferMemory(mDevice, mDeviceMemory, offset));
}
void InitializeMesh()
{
// Generate meshes
// Mg : Buffer
var indicesInBytes = (ulong)(sizeof(uint) * indicesVboData.Length);
var vertexStride = Marshal.SizeOf(typeof(Vector3));
var verticesInBytes = (ulong)(vertexStride * positionVboData.Length);
var bufferSize = indicesInBytes + verticesInBytes;
var bufferCreateInfo = new MgBufferCreateInfo
{
Usage = MgBufferUsageFlagBits.INDEX_BUFFER_BIT | MgBufferUsageFlagBits.VERTEX_BUFFER_BIT,
Size = bufferSize,
};
var device = mConfiguration.Device;
var result = device.CreateBuffer(bufferCreateInfo, null, out mBuffer);
Debug.Assert(result == Result.SUCCESS);
MgMemoryRequirements memReqs;
device.GetBufferMemoryRequirements(mBuffer, out memReqs);
const MgMemoryPropertyFlagBits memoryPropertyFlags = MgMemoryPropertyFlagBits.HOST_COHERENT_BIT;
uint memoryTypeIndex;
mConfiguration.Partition.GetMemoryType(
memReqs.MemoryTypeBits, memoryPropertyFlags, out memoryTypeIndex);
var memAlloc = new MgMemoryAllocateInfo
{
MemoryTypeIndex = memoryTypeIndex,
AllocationSize = memReqs.Size,
};
result = device.AllocateMemory(memAlloc, null, out mDeviceMemory);
Debug.Assert(result == Result.SUCCESS);
mBuffer.BindBufferMemory(device, mDeviceMemory, 0);
// COPY INDEX DATA
IntPtr dest;
result = mDeviceMemory.MapMemory(device, 0, bufferSize, 0, out dest);
Debug.Assert(result == Result.SUCCESS);
var tempIndices = new byte[indicesInBytes];
Buffer.BlockCopy(indicesVboData, 0, tempIndices, 0, (int)indicesInBytes);
Marshal.Copy(tempIndices, 0, dest, (int)indicesInBytes);
// COPY VERTEX DATA
var vertexOffset = indicesInBytes;
// Copy the struct to unmanaged memory.
int offset = (int)vertexOffset;
for (int i = 0; i < positionVboData.Length; ++i)
{
IntPtr localDest = IntPtr.Add(dest, offset);
Marshal.StructureToPtr(positionVboData[i], localDest, false);
offset += vertexStride;
}
mDeviceMemory.UnmapMemory(device);
mIndices = new BufferInfo
{
Buffer = mBuffer,
DeviceMemory = mDeviceMemory,
Offset = 0,
Length = indicesInBytes,
};
mVertices = new BufferInfo
{
Buffer = mBuffer,
DeviceMemory = mDeviceMemory,
Offset = indicesInBytes,
Length = verticesInBytes,
};
}
