mirror of
https://github.com/sal063/AC6_recomp
synced 2026-08-22 07:04:31 -04:00
Dipshet
23e463737c
The cutscene DoF chain is authored for the 640×360 guest grid; at render scale > 1 its guest-granular blur kernels alias against host-granular content, visible as streaks and ghost outlines. Fix: snap the two CoC pre-blur passes to guest texel centers and densify the two 13-tap gather passes per axis. Hash-allowlisted, behind ac6_fix_dof (on), inert at 1x.
130 lines
8.5 KiB
C++
130 lines
8.5 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2020 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*
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* @modified Tom Clay, 2026 - Adapted for ReXGlue runtime
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*/
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#include <rex/graphics/flags.h>
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#include <rex/logging.h>
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#include <rex/ui/renderdoc_api.h>
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REXCVAR_DEFINE_BOOL(gpu_allow_invalid_fetch_constants, false, "GPU",
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"Allow invalid fetch constants");
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REXCVAR_DEFINE_BOOL(native_2x_msaa, true, "GPU", "Enable native 2x MSAA");
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REXCVAR_DEFINE_BOOL(depth_float24_round, false, "GPU", "Round float24 depth values");
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REXCVAR_DEFINE_BOOL(depth_float24_convert_in_pixel_shader, false, "GPU",
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"Convert float24 depth in pixel shader");
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REXCVAR_DEFINE_BOOL(depth_transfer_not_equal_test, true, "GPU",
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"Use not-equal test for depth transfer");
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REXCVAR_DEFINE_BOOL(gamma_render_target_as_unorm16, true, "GPU",
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"Use R16G16B16A16_UNORM for gamma render targets (more accurate than sRGB)")
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.lifecycle(rex::cvar::Lifecycle::kHotReload);
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REXCVAR_DEFINE_STRING(dump_shaders, "", "GPU", "Path to dump shaders to");
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REXCVAR_DEFINE_BOOL(use_fuzzy_alpha_epsilon, true, "GPU",
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"Use approximate compare for alpha test values to prevent "
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"flickering on NVIDIA graphics cards");
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REXCVAR_DEFINE_BOOL(vfetch_index_rounding_bias, false, "GPU/Shader",
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"Apply small epsilon bias to vertex fetch indices before "
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"flooring to fix black triangles caused by RCP precision");
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REXCVAR_DEFINE_BOOL(draw_resolution_scaled_texture_offsets, true, "GPU/Shader",
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"Scale texture offsets with draw resolution");
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REXCVAR_DEFINE_BOOL(param_gen_integer_guest_position, false, "GPU/Shader",
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"At >1x draw resolution scale, floor the PsParamGen pixel "
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"position to the integer guest-pixel index instead of keeping "
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"the sub-guest-pixel fraction. Fixes the mosaic in games that "
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"feed the position into their own integer pixel-address math "
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"(e.g. AC6's deferred EDRAM restore/de-swizzle passes), whose "
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"frac()-based bit extraction otherwise sees a doubled period and "
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"scrambles the sample coordinate. Those passes then sample at "
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"guest resolution. Off by default; harmless for shaders that pass "
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"the position straight to tfetch only at 1x.");
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REXCVAR_DEFINE_BOOL(param_gen_host_subpixel_restore, false, "GPU/Shader",
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"Builds on param_gen_integer_guest_position (and implies it): for "
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"resolution-scaled, position-derived 2D samples in pixel shaders "
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"that use PsParamGen, re-adds the host sub-pixel offset to the "
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"sample coordinate so the de-swizzle restore passes sample at full "
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"host resolution instead of the guest-texel center. Turns the "
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"mosaic fix from clean-but-soft into true resolution-scaled detail. "
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"Off by default; may need per-shader scoping if it disturbs other "
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"passes that read scaled render targets via interpolated coords.");
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REXCVAR_DEFINE_STRING(ac6_neutralize_deswizzle_hashes, "", "GPU/Shader",
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"AC6: comma/space-separated tokens \"<hash>[:<slot>[+<slot>...]]\" "
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"naming guest pixel-shader ucode hashes (hex) whose param_gen 2D "
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"texture samples manually de-swizzle the raw EDRAM sub-tile order of "
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"their source. The emulator's texture cache detiles everything to "
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"linear, so that de-swizzle is always a wrong texel permutation here "
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"(the mosaic/streak class). For a matching fetch the sample "
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"coordinate is replaced unconditionally with the identity host-texel "
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"UV (SV_Position.xy / (guest_size * scale)) -- a 1:1 copy. A bare "
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"hash overrides ALL of that shader's fetches; \":4\" limits it to "
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"Xenos tfetch slot 4 (needed when only some fetches de-swizzle, e.g. "
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"the AC6 cloud compositor: scene fetch de-swizzles, mask/cloud "
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"fetches use plain UVs and must be left alone). Runtime, no rebuild.");
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REXCVAR_DEFINE_STRING(ac6_snap_guest_texel_hashes, "", "GPU/Shader",
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"AC6: same \"<hash>[:<slot>[+<slot>...]]\" token list as "
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"ac6_neutralize_deswizzle_hashes, naming guest pixel-shader ucode "
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"hashes whose texture taps encode fractional guest-texel bilinear "
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"positions (e.g. the cutscene depth-of-field gather pair). Sampling "
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"a resolution-scaled texture with such a kernel reinterprets every "
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"blend ratio against the finer host grid and alternates the kernel "
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"phase per output pixel, aliasing into striping at >1x. For matching "
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"fetches the normalized coordinate is snapped to the guest texel "
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"center (where host bilinear of a scaled texture returns exactly the "
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"guest texel's box average), restoring the guest sampling grid at any "
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"draw resolution scale. Applied only at >1x and only to "
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"resolution-scaled textures. Runtime, no rebuild.");
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REXCVAR_DEFINE_STRING(ac6_densify_x_fetch_hashes, "", "GPU/Shader",
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"AC6: \"<hash>[:<slot>[+<slot>...]]\" list for HORIZONTAL-axis "
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"separable filter passes (e.g. the cutscene DoF H gather "
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"6328f9c40913c82c). Each allowlisted fetch becomes the average of "
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"2*draw_resolution_scale_x samples spread along X across one "
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"guest-texel half-gap on each side of the original tap - the union "
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"of all taps' cells covers the kernel span continuously, so ghost "
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"copies of arbitrarily thin features merge at any resolution scale. "
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"Convolving the authored kernel with the 2-texel cell box widens the "
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"blur by ~2% (visually shape-faithful). Per-axis scale aware; no-op "
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"when draw_resolution_scale_x is 1. Read at shader translation.");
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REXCVAR_DEFINE_STRING(ac6_densify_y_fetch_hashes, "", "GPU/Shader",
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"AC6: as ac6_densify_x_fetch_hashes, for VERTICAL-axis separable "
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"filter passes (e.g. the cutscene DoF V gather 5bd20f9d0d911687): "
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"2*draw_resolution_scale_y samples along Y per fetch. No-op when "
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"draw_resolution_scale_y is 1.");
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REXCVAR_DEFINE_BOOL(ac6_flare_drop_quad2, true, "GPU/Shader",
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"AC6: cull the sun lens-flare's spurious second billboard "
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"(vertices 4-7) to remove the faint rectangle in the sky");
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REXCVAR_DEFINE_INT32(ac6_flare_drop_index_min, 4, "GPU/Shader",
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"AC6: first vertex index of the flare draw to cull (the "
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"spurious billboard is vertices 4-7 of 8)");
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REXCVAR_DEFINE_BOOL(gpu_debug_markers, false, "GPU",
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"Insert debug markers into GPU command streams for tools "
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"like PIX and RenderDoc. Automatically enabled when "
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"RenderDoc is detected.");
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REXCVAR_DEFINE_BOOL(ac6_fix_trails, true, "AC6",
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"Fix invisible missile/jet trails: drop stale cached vertex-buffer "
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"residency so the GPU copy of AC6's fixed-address trail history ring "
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"refreshes when the CPU writes it. On by default.");
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bool IsGpuDebugMarkersEnabled() {
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static bool cached = false;
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static bool result = false;
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if (!cached) {
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cached = true;
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if (REXCVAR_GET(gpu_debug_markers)) {
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result = true;
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REXLOG_INFO("GPU debug markers enabled via CVar");
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} else {
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auto renderdoc_api = rex::ui::RenderDocAPI::CreateIfConnected();
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if (renderdoc_api) {
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result = true;
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REXLOG_INFO("GPU debug markers auto-enabled (RenderDoc detected)");
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}
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}
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}
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return result;
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}
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