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VideoCommon: Better logic op invert approximation

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This commit is contained in:
TellowKrinkle 2022-07-13 03:56:33 -05:00
commit 600ad5f498
6 changed files with 139 additions and 33 deletions
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38
Source/Core/VideoCommon/ShaderCache.cpp
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@ -601,16 +601,6 @@ AbstractPipelineConfig ShaderCache::GetGXPipelineConfig(
config.depth_state = depth_state;
config.blending_state = blending_state;
config.framebuffer_state = g_framebuffer_manager->GetEFBFramebufferState();
// We can use framebuffer fetch to emulate logic ops in the fragment shader.
if (config.blending_state.logicopenable && !g_ActiveConfig.backend_info.bSupportsLogicOp &&
!g_ActiveConfig.backend_info.bSupportsFramebufferFetch)
{
WARN_LOG_FMT(VIDEO,
"Approximating logic op with blending, this will produce incorrect rendering.");
config.blending_state.ApproximateLogicOpWithBlending();
}
return config;
}
@ -628,6 +618,22 @@ static GXPipelineUid ApplyDriverBugs(const GXPipelineUid& in)
ps->ztest = EmulatedZ::Early;
}
// If framebuffer fetch is available, we can emulate logic ops in the fragment shader
// and don't need the below blend approximation
if (blend.logicopenable && !g_ActiveConfig.backend_info.bSupportsLogicOp &&
!g_ActiveConfig.backend_info.bSupportsFramebufferFetch)
{
if (!blend.LogicOpApproximationIsExact())
WARN_LOG_FMT(VIDEO,
"Approximating logic op with blending, this will produce incorrect rendering.");
if (blend.LogicOpApproximationWantsShaderHelp())
{
ps->emulate_logic_op_with_blend = true;
ps->logic_op_mode = static_cast<u32>(blend.logicmode.Value());
}
blend.ApproximateLogicOpWithBlending();
}
const bool benefits_from_ps_dual_source_off =
(!g_ActiveConfig.backend_info.bSupportsDualSourceBlend &&
g_ActiveConfig.backend_info.bSupportsFramebufferFetch) ||
@ -775,6 +781,18 @@ static GXUberPipelineUid ApplyDriverBugs(const GXUberPipelineUid& in)
memcpy(&out, &in, sizeof(out)); // Copy padding
if (g_ActiveConfig.backend_info.bSupportsDynamicVertexLoader)
out.vertex_format = nullptr;
// If framebuffer fetch is available, we can emulate logic ops in the fragment shader
// and don't need the below blend approximation
if (out.blending_state.logicopenable && !g_ActiveConfig.backend_info.bSupportsLogicOp &&
!g_ActiveConfig.backend_info.bSupportsFramebufferFetch)
{
if (!out.blending_state.LogicOpApproximationIsExact())
WARN_LOG_FMT(VIDEO,
"Approximating logic op with blending, this will produce incorrect rendering.");
out.blending_state.ApproximateLogicOpWithBlending();
}
if (g_ActiveConfig.backend_info.bSupportsFramebufferFetch)
{
// Always blend in shader