////  DeferredFrameTransform.cpp//  libraries/render-utils/src/////  Created by Sam Gateau 6/3/2016.//  Copyright 2016 High Fidelity, Inc.//  Copyright 2024 Overte e.V.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html//#include "DeferredFrameTransform.h" #include "gpu/Context.h"#include "render/Engine.h" DeferredFrameTransform::DeferredFrameTransform() {    FrameTransform frameTransform;    _frameTransformBuffer = gpu::BufferView(std::make_shared<gpu::Buffer>(gpu::Buffer::UniformBuffer, sizeof(FrameTransform), (const gpu::Byte*) &frameTransform));} void DeferredFrameTransform::update(RenderArgs* args) {     // Update the depth info with near and far (same for stereo)    auto nearZ = args->getViewFrustum().getNearClip();    auto farZ = args->getViewFrustum().getFarClip();     auto& frameTransformBuffer = _frameTransformBuffer.edit<FrameTransform>();    frameTransformBuffer.infos.depthInfo = glm::vec4(nearZ * farZ, farZ - nearZ, -farZ, 0.0f);    frameTransformBuffer.infos.pixelInfo = args->_viewport;     args->getViewFrustum().evalProjectionMatrix(frameTransformBuffer.infos.projectionMono);     // Running in stereo ?    bool isStereo = args->isStereo();    if (!isStereo) {        frameTransformBuffer.infos.stereoInfo = glm::vec4(0.0f, (float)args->_viewport.z, 0.0f, 0.0f);        frameTransformBuffer.infos.invPixelInfo = glm::vec4(1.0f / args->_viewport.z, 1.0f / args->_viewport.w, 0.0f, 0.0f);    } else {        frameTransformBuffer.infos.pixelInfo.z *= 0.5f;        frameTransformBuffer.infos.stereoInfo = glm::vec4(1.0f, (float)(args->_viewport.z >> 1), 0.0f, 1.0f);        frameTransformBuffer.infos.invPixelInfo = glm::vec4(2.0f / (float)(args->_viewport.z), 1.0f / args->_viewport.w, 0.0f, 0.0f);    }} void GenerateDeferredFrameTransform::run(const render::RenderContextPointer& renderContext, Output& frameTransform) {    if (!frameTransform) {        frameTransform = std::make_shared<DeferredFrameTransform>();    }     RenderArgs* args = renderContext->args;    frameTransform->update(args);     gpu::doInBatch("GenerateDeferredFrameTransform::run", args->_context, [&](gpu::Batch& batch) {        args->_batch = &batch;         glm::mat4 projMat;        Transform viewMat;        args->getViewFrustum().evalProjectionMatrix(projMat);        args->getViewFrustum().evalViewTransform(viewMat);        batch.setProjectionTransform(projMat);        batch.setViewTransform(viewMat);        // This is the main view / projection transform that will be reused later on        batch.saveViewProjectionTransform(_transformSlot);        // Copy it to the deferred transform for the lighting pass        batch.copySavedViewProjectionTransformToBuffer(_transformSlot, frameTransform->getFrameTransformBuffer()._buffer,                                                       sizeof(DeferredFrameTransform::DeferredFrameInfo));    });}