Files
Faset_Engine/tests/render_temporal_diagnostics_tests.cpp
T

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#include "render_temporal_fixtures.hpp"
#include <cstdint>
#include <iostream>
#include <stdexcept>
using namespace faset::render;
using namespace faset::render::temporal_test;
namespace {
void pixel_decisions_are_diagnostic_only(VisibilityMode visibility) {
constexpr std::uint32_t width = 96, height = 72;
auto config = headless_config(width, height, visibility);
config.temporal_mode = TemporalMode::TAA;
Renderer renderer(config);
Renderer reference(config);
auto frame = lit_scene(width, height);
frame.draws.push_back(cube({0, 0, 0}, {.9f, .4f, .2f, 1}, "diagnostic-cube"));
renderer.render(frame);
reference.render(frame);
require(!renderer.stats().temporal_counters_valid &&
renderer.stats().temporal_accepted_pixels == 0 &&
renderer.stats().temporal_rejected_pixels == 0,
"Normal TAA must not read back per-pixel history diagnostics");
renderer.set_temporal_diagnostics(true);
renderer.render(frame);
reference.render(frame);
const auto accepted = renderer.stats().temporal_accepted_pixels;
const auto rejected = renderer.stats().temporal_rejected_pixels;
require(renderer.stats().temporal_counters_valid && accepted > 0 &&
accepted + rejected == width * height,
"Requested TAA diagnostics count each scene pixel and reuse eligible history");
require(renderer.pixels() == reference.pixels(),
"Counting pixels must not alter the TAA image");
frame.camera_cut = true;
renderer.render(frame);
reference.render(frame);
require(renderer.stats().temporal_counters_valid &&
renderer.stats().temporal_accepted_pixels == 0 &&
renderer.stats().temporal_rejected_pixels == width * height,
"A camera cut rejects every per-pixel history sample");
frame.camera_cut = false;
frame.scene_rect = {7, 9, 80, 50};
renderer.render(frame);
reference.render(frame);
require(renderer.stats().temporal_counters_valid &&
renderer.stats().temporal_accepted_pixels == 0 &&
renderer.stats().temporal_rejected_pixels == 80 * 50,
"The counter covers the scene rectangle, excluding output chrome pixels");
renderer.set_temporal_diagnostics(false);
renderer.render(frame);
reference.render(frame);
require(!renderer.stats().temporal_counters_valid &&
renderer.stats().temporal_accepted_pixels == 0 &&
renderer.stats().temporal_rejected_pixels == 0,
"Disabled diagnostics expose no stale values and perform no readback");
renderer.set_temporal_mode(TemporalMode::Off);
reference.set_temporal_mode(TemporalMode::Off);
renderer.set_temporal_diagnostics(true);
renderer.render(frame);
reference.render(frame);
require(!renderer.stats().temporal_counters_valid,
"Off mode does not claim temporal pixel diagnostics");
require(renderer.stats().validation_errors == 0,
"Diagnostic counter transitions pass Vulkan validation");
require(renderer.pixels() == reference.pixels(),
"Diagnostic toggles preserve the Off image");
}
} // namespace
int main() {
try {
pixel_decisions_are_diagnostic_only(VisibilityMode::Direct);
pixel_decisions_are_diagnostic_only(VisibilityMode::GpuFrustum);
std::cout << "Temporal pixel diagnostics are opt-in and exact\n";
return 0;
} catch (const std::exception& error) {
std::cerr << error.what() << '\n';
return 1;
}
}