DirectX11でメモリからテクスチャを作成する

gistfile1.cpp

HRESULT loadTextureFromMemory(unsigned char* image, int w, int h, LPCSTR shaderTextureName, ID3D11Device* pd3dDevice, ID3DX11Effect* effect)
{
	D3D11_TEXTURE2D_DESC desc;
	D3D11_SUBRESOURCE_DATA initialData;
	ID3D11Texture2D* texture = NULL;

	ZeroMemory(&desc, sizeof(D3D11_TEXTURE2D_DESC));
	desc.Width  = w;
	desc.Height = h;
	desc.MipLevels = 1;
	desc.ArraySize = 1;
	desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
	desc.SampleDesc.Count = 1;
	desc.SampleDesc.Quality = 0;
	desc.Usage = D3D11_USAGE_DEFAULT;
	desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
	desc.CPUAccessFlags = 0;
	desc.MiscFlags = 0;
	
	ZeroMemory(&initialData, sizeof(D3D11_SUBRESOURCE_DATA));
	initialData.pSysMem = image;
	initialData.SysMemPitch = w*4;

	HRESULT hr;
	V_RETURN(pd3dDevice->CreateTexture2D(&desc, &initialData, &texture));

	if (texture) {
		ID3D11ShaderResourceView* textureRview = NULL;
		ID3DX11EffectShaderResourceVariable* textureRVar = NULL;	

		D3D11_SHADER_RESOURCE_VIEW_DESC SRVDesc;
		ZeroMemory( &SRVDesc, sizeof(SRVDesc) );
		SRVDesc.Format = desc.Format;
		SRVDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
		SRVDesc.Texture2D.MostDetailedMip = 0;
		SRVDesc.Texture2D.MipLevels = 1;
		V_RETURN(pd3dDevice->CreateShaderResourceView(texture, &SRVDesc, &textureRview));
		textureRVar = effect->GetVariableByName( shaderTextureName )->AsShaderResource();
		V_RETURN(textureRVar->SetResource( textureRview ));

		SAFE_RELEASE( texture );
		SAFE_RELEASE( textureRview );
	}	
	return S_OK;
}