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GS/HW: Clear GS memory if not zero or target overwrite

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This commit is contained in:
refractionpcsx2 2025-12-14 12:54:43 +00:00
parent cf4412ecbe
commit 53d2809cca
1 changed files with 23 additions and 2 deletions
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25
pcsx2/GS/Renderers/HW/GSRendererHW.cpp
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@ -2826,7 +2826,7 @@ void GSRendererHW::Draw()
const bool page_aligned = (m_r.w % pgs.y) == (pgs.y - 1) || (m_r.w % pgs.y) == 0;
const bool is_zero_color_clear = (GetConstantDirectWriteMemClearColor() == 0 && !preserve_rt_color && page_aligned);
const bool is_zero_depth_clear = (GetConstantDirectWriteMemClearDepth() == 0 && !preserve_depth && page_aligned);
bool gs_mem_cleared = false;
// If it's an invalid-sized draw, do the mem clear on the CPU, we don't want to create huge targets.
// If clearing to zero, don't bother creating the target. Games tend to clear more than they use, wasting VRAM/bandwidth.
if (is_zero_color_clear || is_zero_depth_clear || height_invalid)
@ -2858,7 +2858,7 @@ void GSRendererHW::Draw()
{
g_texture_cache->InvalidateTemporaryZ();
}
gs_mem_cleared |= overwriting_whole_rt && overwriting_whole_ds && (!no_rt || !no_ds);
if (overwriting_whole_rt && overwriting_whole_ds &&
TryGSMemClear(no_rt, preserve_rt_color, is_zero_color_clear, rt_end_bp,
no_ds, preserve_depth, is_zero_depth_clear, ds_end_bp))
@ -2888,6 +2888,27 @@ void GSRendererHW::Draw()
return;
}
}
// If not a zero clear or the RT's aren't fully overwritten, we need to see if this is clearing for a future operation.
// So if the FBP or Z being cleared isn't getting used next frame, clear the actual GS memory.
if (!gs_mem_cleared)
{
const int get_next_ctx = m_env.PRIM.CTXT;
const GSDrawingContext& next_ctx = m_env.CTXT[get_next_ctx];
if ((!no_rt && next_ctx.FRAME.FBP != m_cached_ctx.FRAME.FBP) || (!no_ds && next_ctx.ZBUF.ZBP != m_cached_ctx.ZBUF.ZBP))
{
bool frame_masked = no_rt || (m_cached_ctx.FRAME.FBMSK & GSLocalMemory::m_psm[m_cached_ctx.FRAME.PSM].fmsk) || !IsOpaque() || !IsRTWritten();
const bool z_masked = no_ds || m_cached_ctx.ZBUF.ZMSK;
if (frame_masked && m_cached_ctx.FRAME.PSM == PSMCT32 && m_cached_ctx.FRAME.FBMSK == 0xFF000000u)
{
frame_masked = no_rt || !IsOpaque() || !IsRTWritten();
}
// Force clear of memory but don't invalidate anything.
TryGSMemClear(frame_masked, false, false, 0, z_masked, false, false, 0);
}
}
}
GIFRegTEX0 TEX0 = {};