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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/xr/xr_light_estimate.h"
#include "device/vr/public/mojom/vr_service.mojom-blink.h"
#include "third_party/blink/renderer/core/geometry/dom_point_read_only.h"
#include "third_party/blink/renderer/modules/event_target_modules.h"
namespace blink {
XRLightEstimate::XRLightEstimate(
const device::mojom::blink::XRLightProbe& light_probe) {
const device::mojom::blink::XRSphericalHarmonics& spherical_harmonics =
*light_probe.spherical_harmonics;
// We must send 9 coefficients worth of data to the page.
CHECK_EQ(spherical_harmonics.coefficients.size(), 9u);
// We need to send a red, blue, and green channel for each coefficient.
constexpr size_t kSphericalHarmonicsChannels = 3u;
sh_coefficients_ = NotShared(DOMFloat32Array::Create(
spherical_harmonics.coefficients.size() * kSphericalHarmonicsChannels));
auto sh_span = sh_coefficients_->AsSpan();
for (const auto& coefficient : spherical_harmonics.coefficients) {
sh_span[0] = coefficient.red();
sh_span[1] = coefficient.green();
sh_span[2] = coefficient.blue();
sh_span = sh_span.subspan(kSphericalHarmonicsChannels);
}
primary_light_direction_ =
DOMPointReadOnly::Create(light_probe.main_light_direction.x(),
light_probe.main_light_direction.y(),
light_probe.main_light_direction.z(), 0);
primary_light_intensity_ =
DOMPointReadOnly::Create(light_probe.main_light_intensity.red(),
light_probe.main_light_intensity.green(),
light_probe.main_light_intensity.blue(), 1);
}
void XRLightEstimate::Trace(Visitor* visitor) const {
visitor->Trace(sh_coefficients_);
visitor->Trace(primary_light_direction_);
visitor->Trace(primary_light_intensity_);
ScriptWrappable::Trace(visitor);
}
} // namespace blink
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