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[d3d9] Brain-dead gamma ramp validation

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This commit is contained in:
Georg Lehmann 2021-08-19 18:07:10 +02:00 committed by Joshie
parent 3fc1f2cecb
commit 04474b761b
1 changed files with 25 additions and 0 deletions
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25
src/d3d9/d3d9_swapchain.cpp
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@ -668,6 +668,26 @@ namespace dxvk {
return D3D_OK; return D3D_OK;
} }
static bool validateGammaRamp(const WORD (&ramp)[256]) {
if (ramp[0] >= ramp[std::size(ramp) - 1]) {
Logger::err("validateGammaRamp: ramp inverted or flat");
return false;
}
for (size_t i = 1; i < std::size(ramp); i++) {
if (ramp[i] < ramp[i - 1]) {
Logger::err("validateGammaRamp: ramp not monotonically increasing");
return false;
}
if (ramp[i] - ramp[i - 1] >= UINT16_MAX / 2) {
Logger::err("validateGammaRamp: huuuge jump");
return false;
}
}
return true;
}
void D3D9SwapChainEx::SetGammaRamp( void D3D9SwapChainEx::SetGammaRamp(
DWORD Flags, DWORD Flags,
@ -677,6 +697,11 @@ namespace dxvk {
if (unlikely(pRamp == nullptr)) if (unlikely(pRamp == nullptr))
return; return;
if (unlikely(!validateGammaRamp(pRamp->red)
&& !validateGammaRamp(pRamp->blue)
&& !validateGammaRamp(pRamp->green)))
return;
m_ramp = *pRamp; m_ramp = *pRamp;
bool isIdentity = true; bool isIdentity = true;