84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
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#include "ltpch.h"
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#include "dxBlender.h"
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#include "dxSharedContext.h"
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namespace Light {
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dxBlender::dxBlender(std::shared_ptr<dxSharedContext> sharedContext)
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: m_Context(sharedContext)
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{
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// factor map
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m_FactorMap = {
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// constants
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{ BlendFactor::ZERO, D3D11_BLEND_ZERO },
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{ BlendFactor::ONE, D3D11_BLEND_ONE },
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// source
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{ BlendFactor::SRC_COLOR, D3D11_BLEND_SRC_COLOR },
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{ BlendFactor::INVERSE_SRC_COLOR, D3D11_BLEND_INV_SRC_COLOR },
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{ BlendFactor::SRC_ALPHA, D3D11_BLEND_SRC_ALPHA },
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{ BlendFactor::INVERSE_SRC_ALPHA, D3D11_BLEND_INV_SRC_ALPHA },
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// destination
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{ BlendFactor::DST_COLOR, D3D11_BLEND_DEST_COLOR },
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{ BlendFactor::INVERSE_DST_COLOR, D3D11_BLEND_INV_DEST_COLOR },
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{ BlendFactor::DST_ALPHA, D3D11_BLEND_DEST_ALPHA },
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{ BlendFactor::INVERSE_DST_ALPHA, D3D11_BLEND_INV_DEST_ALPHA },
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// source1
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{ BlendFactor::SRC1_COLOR, D3D11_BLEND_SRC1_COLOR },
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{ BlendFactor::INVERSE_SRC1_COLOR, D3D11_BLEND_INV_SRC1_COLOR },
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{ BlendFactor::SRC1_ALPHA, D3D11_BLEND_SRC1_ALPHA },
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{ BlendFactor::INVERSE_SRC1_ALPHA, D3D11_BLEND_INV_SRC1_ALPHA }
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};
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// blender desc
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m_Desc = { };
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m_Desc.RenderTarget[0].BlendEnable = true;
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m_Desc.RenderTarget[0].SrcBlend = D3D11_BLEND_ZERO;
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m_Desc.RenderTarget[0].DestBlend = D3D11_BLEND_ZERO;
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m_Desc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
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m_Desc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ZERO;
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m_Desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
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m_Desc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
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m_Desc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
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// create blend state
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HRESULT hr;
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DXC(m_Context->GetDevice()->CreateBlendState( &m_Desc, &m_BlendState ) );
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}
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void dxBlender::Enable(BlendFactor srcFactor, BlendFactor dstFactor)
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{
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// update desc
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m_Desc.RenderTarget[0].BlendEnable = true;
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m_Desc.RenderTarget[0].SrcBlend = m_FactorMap[srcFactor];
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m_Desc.RenderTarget[0].DestBlend = m_FactorMap[dstFactor];
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// re-create blind state
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HRESULT hr;
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DXC(m_Context->GetDevice()->CreateBlendState(&m_Desc, &m_BlendState));
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// bind blend state
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m_Context->GetDeviceContext()->OMSetBlendState(m_BlendState.Get(), nullptr, 0xffffffff);
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}
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void dxBlender::Disable()
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{
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// update desc
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m_Desc.RenderTarget[0].BlendEnable = false;
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// re-create blind state
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HRESULT hr;
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DXC(m_Context->GetDevice()->CreateBlendState(&m_Desc, &m_BlendState));
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// bind blend state
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m_Context->GetDeviceContext()->OMSetBlendState(m_BlendState.Get(), nullptr, 0xffffffff);
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}
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}
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