public static ReadTexture cretaeReadTexture(NativeStructs.D3D11_TEXTURE2D_DESC a_TextureDesc)
{
a_TextureDesc.BindFlags = 0;
a_TextureDesc.MiscFlags = 0;
a_TextureDesc.CPUAccessFlags = NativeStructs.D3D11_CPU_ACCESS_READ | NativeStructs.D3D11_CPU_ACCESS_WRITE;;
a_TextureDesc.Usage = NativeStructs.D3D11_USAGE_STAGING;
ReadTexture l_return = new ReadTexture();
l_return.m_read_texture = Direct3D11Device.Instance.Device.CreateTexture2D(a_TextureDesc);
using (var lImmediateContext = Direct3D11Device.Instance.Device.GetImmediateContext())
{
D3D11_MAPPED_SUBRESOURCE resource = new D3D11_MAPPED_SUBRESOURCE();
var subresource = D3D11DeviceContext.D3D11CalcSubresource(0, 0, 0);
var lres = lImmediateContext.Map(l_return.m_read_texture.getD3D11Resource(), subresource, D3D11DeviceContext.D3D11_MAP_READ_WRITE, 0, resource);
l_return.m_BufferLength = resource.RowPitch * a_TextureDesc.Height;
lImmediateContext.Unmap(l_return.m_read_texture.getD3D11Resource(), subresource);
}
return(l_return);
}
public void Read(SharedTexture a_TargetTexture, IntPtr aDest)
{
using (var lImmediateContext = Direct3D11Device.Instance.Device.GetImmediateContext())
{
// Copy image into CPU access texture
lImmediateContext.CopyResource(this.m_read_texture.getD3D11Resource(), a_TargetTexture.getD3D11Resource());
lImmediateContext.Flush();
// Copy from CPU access texture to bitmap buffer
D3D11_MAPPED_SUBRESOURCE resource = new D3D11_MAPPED_SUBRESOURCE();
var subresource = D3D11DeviceContext.D3D11CalcSubresource(0, 0, 0);
var lres = lImmediateContext.Map(this.m_read_texture.getD3D11Resource(), subresource, D3D11DeviceContext.D3D11_MAP_READ_WRITE, 0, resource);
NativeMethods.memcpy(aDest, resource.pData, m_BufferLength);
lImmediateContext.Unmap(this.m_read_texture.getD3D11Resource(), subresource);
}
}
public int Map(D3D11Resource pResource, uint Subresource, uint MapType, uint MapFlags, D3D11_MAPPED_SUBRESOURCE pMappedResource)
{
return(map(this.comObject, pResource.ComObject, Subresource, MapType, MapFlags, pMappedResource));
}