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// Copyright 2025 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_webgl_projection_layer.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_xr_gpu_projection_layer_init.h"
#include "third_party/blink/renderer/modules/webgl/webgl_rendering_context_base.h"
#include "third_party/blink/renderer/modules/xr/xr_frame_provider.h"
#include "third_party/blink/renderer/modules/xr/xr_session.h"
#include "third_party/blink/renderer/modules/xr/xr_system.h"
#include "third_party/blink/renderer/modules/xr/xr_webgl_binding.h"
#include "third_party/blink/renderer/modules/xr/xr_webgl_swap_chain.h"
#include "third_party/blink/renderer/platform/graphics/accelerated_static_bitmap_image.h"
namespace blink {
XRWebGLProjectionLayer::XRWebGLProjectionLayer(
XRWebGLBinding* binding,
XRWebGLSwapChain* color_swap_chain,
XRWebGLSwapChain* depth_stencil_swap_chain)
: XRProjectionLayer(binding),
webgl_context_(binding->context()),
color_swap_chain_(color_swap_chain),
depth_stencil_swap_chain_(depth_stencil_swap_chain) {
CHECK(color_swap_chain_);
color_swap_chain_->SetLayer(this);
if (depth_stencil_swap_chain_) {
depth_stencil_swap_chain_->SetLayer(this);
}
}
uint16_t XRWebGLProjectionLayer::textureWidth() const {
return color_swap_chain_->descriptor().width;
}
uint16_t XRWebGLProjectionLayer::textureHeight() const {
return color_swap_chain_->descriptor().height;
}
uint16_t XRWebGLProjectionLayer::textureArrayLength() const {
return color_swap_chain_->descriptor().layers;
}
void XRWebGLProjectionLayer::OnFrameStart() {
color_swap_chain_->OnFrameStart();
if (depth_stencil_swap_chain_) {
depth_stencil_swap_chain_->OnFrameStart();
}
}
void XRWebGLProjectionLayer::OnFrameEnd() {
color_swap_chain_->OnFrameEnd();
if (depth_stencil_swap_chain_) {
depth_stencil_swap_chain_->OnFrameEnd();
}
XRFrameProvider* frame_provider = session()->xr()->frameProvider();
if (viewport_updated_) {
frame_provider->UpdateLayerViewports(this);
viewport_updated_ = false;
}
frame_provider->SubmitWebGLLayer(this,
color_swap_chain_->texture_was_queried());
}
scoped_refptr<StaticBitmapImage>
XRWebGLProjectionLayer::TransferToStaticBitmapImage() {
return color_swap_chain_->TransferToStaticBitmapImage();
}
void XRWebGLProjectionLayer::OnResize() {}
void XRWebGLProjectionLayer::Trace(Visitor* visitor) const {
visitor->Trace(webgl_context_);
visitor->Trace(color_swap_chain_);
visitor->Trace(depth_stencil_swap_chain_);
XRProjectionLayer::Trace(visitor);
}
} // namespace blink
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