////  DeferredFramebuffer.h//  libraries/render-utils/src/////  Created by Sam Gateau 7/11/2016.//  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 "DeferredFramebuffer.h" #include "DeferredBufferWrite_shared.slh" #include "gpu/Batch.h"#include "gpu/Context.h"  DeferredFramebuffer::DeferredFramebuffer() {}  void DeferredFramebuffer::updatePrimaryDepth(const gpu::TexturePointer& depthBuffer) {    //If the depth buffer or size changed, we need to delete our FBOs    bool reset = false;    if ((_primaryDepthTexture != depthBuffer)) {        _primaryDepthTexture = depthBuffer;        reset = true;    }    if (_primaryDepthTexture) {        auto newFrameSize = glm::ivec2(_primaryDepthTexture->getDimensions());        if (_frameSize != newFrameSize) {            _frameSize = newFrameSize;            reset = true;        }    }     if (reset) {        _deferredFramebuffer.reset();        _deferredFramebufferDepthColor.reset();        _deferredColorTexture.reset();        _deferredNormalTexture.reset();        _deferredSpecularTexture.reset();        _deferredVelocityTexture.reset();        _lightingTexture.reset();        _lightingFramebuffer.reset();        _lightingWithVelocityFramebuffer.reset();    }} void DeferredFramebuffer::allocate() {     _deferredFramebuffer = gpu::FramebufferPointer(gpu::Framebuffer::create("deferred"));    _deferredFramebufferDepthColor = gpu::FramebufferPointer(gpu::Framebuffer::create("deferredDepthColor"));     const auto colorFormat = gpu::Element::COLOR_SRGBA_32;    const auto linearFormat = gpu::Element::COLOR_RGBA_32;    const auto halfFormat = gpu::Element(gpu::VEC2, gpu::HALF, gpu::XY);    auto width = _frameSize.x;    auto height = _frameSize.y;     auto defaultSampler = Sampler(Sampler::FILTER_MIN_MAG_POINT);     _deferredColorTexture = gpu::Texture::createRenderBuffer(colorFormat, width, height, gpu::Texture::SINGLE_MIP, defaultSampler);    _deferredNormalTexture = gpu::Texture::createRenderBuffer(linearFormat, width, height, gpu::Texture::SINGLE_MIP, defaultSampler);    _deferredSpecularTexture = gpu::Texture::createRenderBuffer(linearFormat, width, height, gpu::Texture::SINGLE_MIP, defaultSampler);    _deferredVelocityTexture = gpu::Texture::createRenderBuffer(halfFormat, width, height, gpu::Texture::SINGLE_MIP, defaultSampler);     _deferredFramebuffer->setRenderBuffer(DEFERRED_COLOR_SLOT, _deferredColorTexture);    _deferredFramebuffer->setRenderBuffer(DEFERRED_NORMAL_SLOT, _deferredNormalTexture);    _deferredFramebuffer->setRenderBuffer(DEFERRED_SPECULAR_SLOT, _deferredSpecularTexture);    _deferredFramebuffer->setRenderBuffer(DEFERRED_VELOCITY_SLOT, _deferredVelocityTexture);     _deferredFramebufferDepthColor->setRenderBuffer(0, _deferredColorTexture);     auto depthFormat = gpu::Element(gpu::SCALAR, gpu::UINT32, gpu::DEPTH_STENCIL); // Depth24_Stencil8 texel format    if (!_primaryDepthTexture) {        _primaryDepthTexture = gpu::Texture::createRenderBuffer(depthFormat, width, height, gpu::Texture::SINGLE_MIP, defaultSampler);    }     _deferredFramebuffer->setDepthStencilBuffer(_primaryDepthTexture, depthFormat);     _deferredFramebufferDepthColor->setDepthStencilBuffer(_primaryDepthTexture, depthFormat);      auto smoothSampler = Sampler(Sampler::FILTER_MIN_MAG_LINEAR_MIP_POINT, Sampler::WRAP_CLAMP);     _lightingTexture = gpu::Texture::createRenderBuffer(gpu::Element(gpu::SCALAR, gpu::FLOAT, gpu::R11G11B10), width, height, gpu::Texture::SINGLE_MIP, smoothSampler);    _lightingFramebuffer = gpu::FramebufferPointer(gpu::Framebuffer::create("lighting"));    _lightingFramebuffer->setRenderBuffer(0, _lightingTexture);    _lightingFramebuffer->setDepthStencilBuffer(_primaryDepthTexture, depthFormat);     _lightingWithVelocityFramebuffer = gpu::FramebufferPointer(gpu::Framebuffer::create("lighting_velocity"));    _lightingWithVelocityFramebuffer->setRenderBuffer(0, _lightingTexture);    _lightingWithVelocityFramebuffer->setRenderBuffer(1, _deferredVelocityTexture);    _lightingWithVelocityFramebuffer->setDepthStencilBuffer(_primaryDepthTexture, depthFormat);     _deferredFramebuffer->setRenderBuffer(DEFERRED_LIGHTING_SLOT, _lightingTexture);}  gpu::TexturePointer DeferredFramebuffer::getPrimaryDepthTexture() {    if (!_primaryDepthTexture) {        allocate();    }    return _primaryDepthTexture;} gpu::FramebufferPointer DeferredFramebuffer::getDeferredFramebuffer() {    if (!_deferredFramebuffer) {        allocate();    }    return _deferredFramebuffer;} gpu::FramebufferPointer DeferredFramebuffer::getDeferredFramebufferDepthColor() {    if (!_deferredFramebufferDepthColor) {        allocate();    }    return _deferredFramebufferDepthColor;} gpu::TexturePointer DeferredFramebuffer::getDeferredColorTexture() {    if (!_deferredColorTexture) {        allocate();    }    return _deferredColorTexture;} gpu::TexturePointer DeferredFramebuffer::getDeferredNormalTexture() {    if (!_deferredNormalTexture) {        allocate();    }    return _deferredNormalTexture;} gpu::TexturePointer DeferredFramebuffer::getDeferredSpecularTexture() {    if (!_deferredSpecularTexture) {        allocate();    }    return _deferredSpecularTexture;} gpu::TexturePointer DeferredFramebuffer::getDeferredVelocityTexture() {    if (!_deferredVelocityTexture) {        allocate();    }    return _deferredVelocityTexture;} gpu::FramebufferPointer DeferredFramebuffer::getLightingFramebuffer() {    if (!_lightingFramebuffer) {        allocate();    }    return _lightingFramebuffer;} gpu::FramebufferPointer DeferredFramebuffer::getLightingWithVelocityFramebuffer() {    if (!_lightingWithVelocityFramebuffer) {        allocate();    }    return _lightingWithVelocityFramebuffer;} gpu::TexturePointer DeferredFramebuffer::getLightingTexture() {    if (!_lightingTexture) {        allocate();    }    return _lightingTexture;}