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D3D12: native_render_suppress_mode (suppress the emulated postfx chain)

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This commit is contained in:
mchughalex 2026-07-09 04:53:12 +01:00
parent 0fcbad33e6
commit 96de5455f2
1 changed files with 62 additions and 10 deletions
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72
src/graphics/d3d12/command_processor.cpp
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@ -39,10 +39,49 @@
REXCVAR_DEFINE_BOOL(d3d12_bindless, true, "GPU/D3D12", "Use bindless resources where available")
.lifecycle(rex::cvar::Lifecycle::kRequiresRestart);
REXCVAR_DEFINE_INT32(native_render_suppress_mode, 2, "GPU",
"Which emulated passes to suppress while the native guest-output "
"renderer is active. 0 = framebuffer-sized passes only (surface "
"pitch >= 1280); the game's whole postfx chain then still executes "
"at 1152x640 x resolution scale EVERY frame and paces the pipeline "
"(~half the achievable frame rate). 1 = suppress everything (perf "
"probing; mid-gameplay lightmap page composition breaks). 2 = "
"suppress everything EXCEPT the memory-composition passes whose "
"outputs the native renderer samples from guest memory: lightmap "
"page composition (pitch 1024) and small composite surfaces (pitch "
"<= 512, CAS outfit pieces). Menus/pause/loading always render "
"fully (the native renderer yields there), so shop/outfit "
"composition is unaffected by any mode.")
.range(0, 2)
.lifecycle(rex::cvar::Lifecycle::kHotReload);
REXCVAR_DEFINE_BOOL(d3d12_readback_memexport, false, "GPU/D3D12",
"Read data written by memory export in shaders on the CPU")
.lifecycle(rex::cvar::Lifecycle::kHotReload);
namespace {
// While the native guest-output renderer is active: should the emulated pass
// currently targeting `surface_pitch`-wide surfaces be suppressed? See
// native_render_suppress_mode. Draw and resolve suppression must agree:
// executed passes need their resolves, suppressed passes leave garbage EDRAM
// that must never be copied out.
bool ShouldSuppressPassAtPitch(uint32_t surface_pitch) {
switch (REXCVAR_GET(native_render_suppress_mode)) {
case 0:
return surface_pitch >= 1280;
case 1:
return true;
default:
// Execute only the memory-composition passes the native renderer
// samples: lightmap page composition (1024) and small composite
// surfaces (<= 512, CAS outfit pieces). The <= 512 window also lets a
// few tiny postfx pyramid mips through, negligible, and safer than
// guessing which small surfaces matter.
return !(surface_pitch == 1024 || surface_pitch <= 512);
}
}
} // namespace
REXCVAR_DEFINE_BOOL(d3d12_readback_resolve, false, "GPU/D3D12",
"Read render-to-texture results on the CPU")
.lifecycle(rex::cvar::Lifecycle::kHotReload);
@ -2792,13 +2831,12 @@ bool D3D12CommandProcessor::IssueDraw(xenos::PrimitiveType primitive_type, uint3
}
#endif
if (ShouldSuppressEmulatedDraws() &&
regs.Get<reg::RB_SURFACE_INFO>().surface_pitch >= 1280) {
// Native output active: skip the resolve of the SUPPRESSED
// (framebuffer-sized) passes only. Their draws left garbage in EDRAM;
// copying it out would overwrite guest texture payloads the native
// renderer still samples. Small-surface passes (lightmap page
// composition at 1024-wide pages, CAS outfit composites, other RTT)
// now EXECUTE under suppression, so their resolves must run: skipping
ShouldSuppressPassAtPitch(regs.Get<reg::RB_SURFACE_INFO>().surface_pitch)) {
// Native output active: skip the resolves of SUPPRESSED passes; their
// draws left garbage in EDRAM, and copying it out would overwrite
// guest texture payloads the native renderer still samples. Passes
// that EXECUTE under the current suppression mode (lightmap page
// composition, CAS composites) must keep their resolves: skipping
// lightpage composition left never-composed pages sampling garbage:
// the light/dark checkerboard ground.
return true;
@ -2863,9 +2901,23 @@ bool D3D12CommandProcessor::IssueDraw(xenos::PrimitiveType primitive_type, uint3
// suppressing it left pages that streamed in during native play
// uncomposed (garbage), the light/dark checkerboard ground. CAS outfit
// composition mid-gameplay is covered by the same rule.
if (!memexport_used && ShouldSuppressEmulatedDraws() &&
regs.Get<reg::RB_SURFACE_INFO>().surface_pitch >= 1280) {
return true;
if (!memexport_used && ShouldSuppressEmulatedDraws()) {
const uint32_t pitch = regs.Get<reg::RB_SURFACE_INFO>().surface_pitch;
if (ShouldSuppressPassAtPitch(pitch)) {
return true;
}
// Census of the passes still EXECUTING under suppression (each distinct
// surface pitch logged once): the data for tightening the filter; these
// passes pace the whole pipeline (the ~160 fps ceiling was the game's
// postfx chain executing at 1152x640 x resolution scale every frame;
// gameplay census on Skate 3: pitches 1200/800/640/600/560/320/280/80).
static std::atomic<uint32_t> logged_pitch_mask[8192 / 32] = {};
if (pitch < 8192) {
const uint32_t bit = 1u << (pitch % 32);
if ((logged_pitch_mask[pitch / 32].fetch_or(bit) & bit) == 0) {
REXGPU_INFO("suppression census: executing draws at surface_pitch={}", pitch);
}
}
}
if (!BeginSubmission(true)) {