124 lines
3.0 KiB
C++
124 lines
3.0 KiB
C++
//
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// Copyright 2013 Pixar
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//
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// Licensed under the terms set forth in the LICENSE.txt file available at
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// https://opensubdiv.org/license.
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//
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#include "../osd/cpuD3D11VertexBuffer.h"
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#include "../far/error.h"
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#include <D3D11.h>
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#include <cassert>
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#include <string.h>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Osd {
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CpuD3D11VertexBuffer::CpuD3D11VertexBuffer(int numElements, int numVertices)
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: _numElements(numElements), _numVertices(numVertices),
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_d3d11Buffer(NULL), _cpuBuffer(NULL) {
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}
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CpuD3D11VertexBuffer::~CpuD3D11VertexBuffer() {
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delete[] _cpuBuffer;
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if (_d3d11Buffer) _d3d11Buffer->Release();
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}
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CpuD3D11VertexBuffer *
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CpuD3D11VertexBuffer::Create(int numElements, int numVertices,
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ID3D11DeviceContext *deviceContext) {
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CpuD3D11VertexBuffer *instance =
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new CpuD3D11VertexBuffer(numElements, numVertices);
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ID3D11Device *device;
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deviceContext->GetDevice(&device);
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if (instance->allocate(device)) return instance;
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delete instance;
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return NULL;
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}
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void
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CpuD3D11VertexBuffer::UpdateData(const float *src, int startVertex,
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int numVertices,
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void * /*deviceContext*/) {
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memcpy(_cpuBuffer + startVertex * _numElements, src,
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_numElements * numVertices * sizeof(float));
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}
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int
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CpuD3D11VertexBuffer::GetNumElements() const {
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return _numElements;
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}
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int
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CpuD3D11VertexBuffer::GetNumVertices() const {
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return _numVertices;
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}
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float*
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CpuD3D11VertexBuffer::BindCpuBuffer() {
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return _cpuBuffer;
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}
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ID3D11Buffer *
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CpuD3D11VertexBuffer::BindD3D11Buffer(ID3D11DeviceContext *deviceContext) {
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assert(deviceContext);
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D3D11_MAPPED_SUBRESOURCE resource;
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HRESULT hr = deviceContext->Map(_d3d11Buffer, 0,
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D3D11_MAP_WRITE_DISCARD, 0, &resource);
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if (FAILED(hr)) {
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Far::Error(Far::FAR_RUNTIME_ERROR, "Fail to map buffer\n");
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return NULL;
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}
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int size = _numElements * _numVertices * sizeof(float);
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memcpy(resource.pData, _cpuBuffer, size);
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deviceContext->Unmap(_d3d11Buffer, 0);
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return _d3d11Buffer;
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}
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bool
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CpuD3D11VertexBuffer::allocate(ID3D11Device *device) {
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_cpuBuffer = new float[_numElements * _numVertices];
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// XXX: should move this constructor to factory for error handling
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D3D11_BUFFER_DESC hBufferDesc;
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hBufferDesc.ByteWidth = _numElements * _numVertices * sizeof(float);
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hBufferDesc.Usage = D3D11_USAGE_DYNAMIC;
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hBufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER | D3D11_BIND_SHADER_RESOURCE;
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hBufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
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hBufferDesc.MiscFlags = 0;
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hBufferDesc.StructureByteStride = sizeof(float); // XXX ?
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HRESULT hr;
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hr = device->CreateBuffer(&hBufferDesc, NULL, &_d3d11Buffer);
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if (FAILED(hr)) {
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Far::Error(Far::FAR_RUNTIME_ERROR,
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"Fail in CreateBuffer\n");
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return false;
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}
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return true;
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}
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} // end namespace Osd
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} // end namespace OPENSUBDIV_VERSION
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} // end namespace OpenSubdiv
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