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GS/HW: Optimize sw/hdr colclip on some blend formulas. 

Alpha is either As or Af.
`Cd*Alpha, Cd*(1 - Alpha).`
When Alpha <= 128 we can let hw blend do it's thing as it won't be able to wrap.
This commit is contained in:
lightningterror 2024-05-08 21:34:35 +02:00
parent 8ad08706aa
commit 8b9b7f7baf
1 changed files with 7 additions and 1 deletions
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8
pcsx2/GS/Renderers/HW/GSRendererHW.cpp
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@ -4039,6 +4039,9 @@ void GSRendererHW::EmulateBlending(int rt_alpha_min, int rt_alpha_max, bool& DAT
// HW blend can handle Cd output.
bool color_dest_blend = !!(blend_flag & BLEND_CD);
// HW blend can handle it, no need for sw blend or hdr, Cd*Alpha or Cd*(1 - Alpha) where Alpha <= 128, Alpha is As or Af.
bool color_dest_blend2 = alpha_less_one && ((blend_flag & BLEND_HW2) || (m_conf.ps.blend_b == m_conf.ps.blend_d == 1 && m_conf.ps.blend_a == 2));
// Do the multiplication in shader for blending accumulation: Cs*As + Cd or Cs*Af + Cd
bool accumulation_blend = !!(blend_flag & BLEND_ACCU);
// If alpha == 1.0, almost everything is an accumulation blend!
@ -4111,6 +4114,7 @@ void GSRendererHW::EmulateBlending(int rt_alpha_min, int rt_alpha_max, bool& DAT
case AccBlendLevel::Basic:
// Prefer sw blend if possible.
color_dest_blend &= !prefer_sw_blend;
color_dest_blend2 &= !prefer_sw_blend;
accumulation_blend &= !prefer_sw_blend;
// Enable sw blending for barriers.
sw_blending |= blend_requires_barrier;
@ -4150,6 +4154,7 @@ void GSRendererHW::EmulateBlending(int rt_alpha_min, int rt_alpha_max, bool& DAT
case AccBlendLevel::Basic:
// Prefer sw blend if possible.
color_dest_blend &= !prefer_sw_blend;
color_dest_blend2 &= !prefer_sw_blend;
accumulation_blend &= !prefer_sw_blend;
// Enable sw blending for reading fb.
sw_blending |= prefer_sw_blend;
@ -4189,10 +4194,11 @@ void GSRendererHW::EmulateBlending(int rt_alpha_min, int rt_alpha_max, bool& DAT
free_colclip = blend_non_recursive;
GL_DBG("COLCLIP Info (Blending: %u/%u/%u/%u, OVERLAP: %d)", m_conf.ps.blend_a, m_conf.ps.blend_b, m_conf.ps.blend_c, m_conf.ps.blend_d, m_prim_overlap);
if (color_dest_blend)
if (color_dest_blend || color_dest_blend2)
{
// No overflow, disable colclip.
GL_INS("COLCLIP mode DISABLED");
sw_blending = false;
}
else if (free_colclip)
{