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GS-hw: Prefer sw blend when one barrier is already enabled and prims don't overlap. 

More accurate, speed will be the same.
This commit is contained in:
lightningterror 2022-02-09 14:14:19 +01:00
parent ad415945a6
commit 38f1ae34ad
1 changed files with 7 additions and 3 deletions
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10
pcsx2/GS/Renderers/HW/GSRendererNew.cpp
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@ -590,6 +590,10 @@ void GSRendererNew::EmulateBlending(bool& DATE_PRIMID, bool& DATE_BARRIER)
bool sw_blending = false;
if (g_gs_device->Features().texture_barrier)
{
// Condition 1: Require full sw blend for full barrier.
// Condition 2: One barrier is already enabled, prims don't overlap so let's use sw blend instead.
const bool prefer_sw_blend = m_conf.require_full_barrier || (m_conf.require_one_barrier && m_prim_overlap == PRIM_OVERLAP_NO);
// SW Blend is (nearly) free. Let's use it.
const bool impossible_or_free_blend = (blend_flag & BLEND_A_MAX) // Impossible blending
|| blend_non_recursive // Free sw blending, doesn't require barriers or reading fb
@ -618,9 +622,9 @@ void GSRendererNew::EmulateBlending(bool& DATE_PRIMID, bool& DATE_BARRIER)
// SW FBMASK, needs sw blend, avoid hitting any hw blend pre enabled (accumulation, blend mix, blend cd),
// fixes shadows in Superman shadows of Apokolips.
// DATE_BARRIER already does full barrier so also makes more sense to do full sw blend.
color_dest_blend &= !m_conf.require_full_barrier;
color_dest_blend &= !prefer_sw_blend;
// If prims don't overlap prefer full sw blend on blend_ad_alpha_masked cases.
accumulation_blend &= !(m_conf.require_full_barrier || (blend_ad_alpha_masked && m_prim_overlap == PRIM_OVERLAP_NO));
accumulation_blend &= !(prefer_sw_blend || (blend_ad_alpha_masked && m_prim_overlap == PRIM_OVERLAP_NO));
sw_blending |= impossible_or_free_blend;
// Try to do hw blend for clr2 case.
sw_blending &= !clr_blend1_2;
@ -634,7 +638,7 @@ void GSRendererNew::EmulateBlending(bool& DATE_PRIMID, bool& DATE_BARRIER)
}
else
{
// FBMASK already reads the fb so it is safe to enable sw blend when there is no overlap.
// FBMASK or channel shuffle already reads the fb so it is safe to enable sw blend when there is no overlap.
const bool fbmask_no_overlap = m_conf.require_one_barrier && (m_prim_overlap == PRIM_OVERLAP_NO);
switch (GSConfig.AccurateBlendingUnit)