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[d3d11] Chjeck whether input layouts are identical

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Prevents redundant state changes when a game switches between
identical input layouts. Reduces the the number of Vulkan
calls in Grim Dawn by ~30%.
This commit is contained in:
Philip Rebohle 2018-05-27 01:10:49 +02:00
parent de9ffdcfa3
commit 8cd97959f2
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GPG Key ID: C8CC613427A31C99
3 changed files with 49 additions and 15 deletions
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10
src/d3d11/d3d11_context.cpp
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@ -1235,7 +1235,17 @@ namespace dxvk {
auto inputLayout = static_cast<D3D11InputLayout*>(pInputLayout);
if (m_state.ia.inputLayout != inputLayout) {
bool equal = false;
// Some games (e.g. Grim Dawn) create lots and lots of
// identical input layouts, so we'll only apply the state
// if the input layouts has actually changed between calls.
if (m_state.ia.inputLayout != nullptr && inputLayout != nullptr)
equal = m_state.ia.inputLayout->Compare(inputLayout);
m_state.ia.inputLayout = inputLayout;
if (!equal)
ApplyInputLayout();
}
}

21
src/d3d11/d3d11_input_layout.cpp
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@ -55,4 +55,25 @@ namespace dxvk {
m_bindings.data());
}
bool D3D11InputLayout::Compare(const D3D11InputLayout* pOther) const {
bool eq = m_attributes.size() == pOther->m_attributes.size()
&& m_bindings.size() == pOther->m_bindings.size();
for (uint32_t i = 0; eq && i < m_attributes.size(); i++) {
eq &= m_attributes[i].location == pOther->m_attributes[i].location
&& m_attributes[i].binding == pOther->m_attributes[i].binding
&& m_attributes[i].format == pOther->m_attributes[i].format
&& m_attributes[i].offset == pOther->m_attributes[i].offset;
}
for (uint32_t i = 0; eq && i < m_bindings.size(); i++) {
eq &= m_bindings[i].binding == pOther->m_bindings[i].binding
&& m_bindings[i].fetchRate == pOther->m_bindings[i].fetchRate
&& m_bindings[i].inputRate == pOther->m_bindings[i].inputRate;
}
return eq;
}
}

5
src/d3d11/d3d11_input_layout.h
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@ -24,11 +24,14 @@ namespace dxvk {
void** ppvObject) final;
void STDMETHODCALLTYPE GetDevice(
ID3D11Device **ppDevice) final;
ID3D11Device** ppDevice) final;
void BindToContext(
const Rc<DxvkContext>& ctx);
bool Compare(
const D3D11InputLayout* pOther) const;
private:
Com<D3D11Device> m_device;