////  FramebufferCache.cpp//  interface/src/renderer////  Created by Andrzej Kapolka on 8/6/13.//  Copyright 2013 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include "FramebufferCache.h" #include <mutex> #include <glm/glm.hpp> #include <QMap>#include <QQueue>#include <gpu/Batch.h>#include "RenderUtilsLogging.h" static QQueue<gpu::FramebufferPointer> _cachedFramebuffers; FramebufferCache::FramebufferCache() {} FramebufferCache::~FramebufferCache() {    _cachedFramebuffers.clear();} void FramebufferCache::setFrameBufferSize(QSize frameBufferSize) {    //If the size changed, we need to delete our FBOs    if (_frameBufferSize != frameBufferSize) {        _frameBufferSize = frameBufferSize;        _selfieFramebuffer.reset();        _cachedFramebuffers.clear();        _occlusionFramebuffer.reset();        _occlusionTexture.reset();        _occlusionBlurredFramebuffer.reset();        _occlusionBlurredTexture.reset();    }} void FramebufferCache::createPrimaryFramebuffer() {    auto colorFormat = gpu::Element::COLOR_SRGBA_32;    auto width = _frameBufferSize.width();    auto height = _frameBufferSize.height();     auto defaultSampler = gpu::Sampler(gpu::Sampler::FILTER_MIN_MAG_POINT);     _selfieFramebuffer = gpu::FramebufferPointer(gpu::Framebuffer::create());    auto tex = gpu::TexturePointer(gpu::Texture::create2D(colorFormat, width * 0.5, height * 0.5, defaultSampler));    _selfieFramebuffer->setRenderBuffer(0, tex);     auto smoothSampler = gpu::Sampler(gpu::Sampler::FILTER_MIN_MAG_MIP_LINEAR);       resizeAmbientOcclusionBuffers();}  void FramebufferCache::resizeAmbientOcclusionBuffers() {    _occlusionFramebuffer.reset();    _occlusionTexture.reset();    _occlusionBlurredFramebuffer.reset();    _occlusionBlurredTexture.reset();      auto width = _frameBufferSize.width() >> _AOResolutionLevel;    auto height = _frameBufferSize.height() >> _AOResolutionLevel;    auto colorFormat = gpu::Element(gpu::VEC4, gpu::NUINT8, gpu::RGB);    auto defaultSampler = gpu::Sampler(gpu::Sampler::FILTER_MIN_MAG_LINEAR);    // auto depthFormat = gpu::Element(gpu::SCALAR, gpu::UINT32, gpu::DEPTH_STENCIL); // Depth24_Stencil8 texel format     _occlusionTexture = gpu::TexturePointer(gpu::Texture::create2D(colorFormat, width, height, defaultSampler));    _occlusionFramebuffer = gpu::FramebufferPointer(gpu::Framebuffer::create());    _occlusionFramebuffer->setRenderBuffer(0, _occlusionTexture); //   _occlusionFramebuffer->setDepthStencilBuffer(_primaryDepthTexture, depthFormat);     _occlusionBlurredTexture = gpu::TexturePointer(gpu::Texture::create2D(colorFormat, width, height, defaultSampler));    _occlusionBlurredFramebuffer = gpu::FramebufferPointer(gpu::Framebuffer::create());    _occlusionBlurredFramebuffer->setRenderBuffer(0, _occlusionBlurredTexture);   // _occlusionBlurredFramebuffer->setDepthStencilBuffer(_primaryDepthTexture, depthFormat);}  gpu::FramebufferPointer FramebufferCache::getFramebuffer() {    if (_cachedFramebuffers.isEmpty()) {        _cachedFramebuffers.push_back(gpu::FramebufferPointer(gpu::Framebuffer::create(gpu::Element::COLOR_SRGBA_32, _frameBufferSize.width(), _frameBufferSize.height())));    }    gpu::FramebufferPointer result = _cachedFramebuffers.front();    _cachedFramebuffers.pop_front();    return result;} void FramebufferCache::releaseFramebuffer(const gpu::FramebufferPointer& framebuffer) {    if (QSize(framebuffer->getSize().x, framebuffer->getSize().y) == _frameBufferSize) {        _cachedFramebuffers.push_back(framebuffer);    }} gpu::FramebufferPointer FramebufferCache::getSelfieFramebuffer() {    if (!_selfieFramebuffer) {        createPrimaryFramebuffer();    }    return _selfieFramebuffer;} void FramebufferCache::setAmbientOcclusionResolutionLevel(int level) {    const int MAX_AO_RESOLUTION_LEVEL = 4;    level = std::max(0, std::min(level, MAX_AO_RESOLUTION_LEVEL));    if (level != _AOResolutionLevel) {        _AOResolutionLevel = level;        resizeAmbientOcclusionBuffers();    }} gpu::FramebufferPointer FramebufferCache::getOcclusionFramebuffer() {    if (!_occlusionFramebuffer) {        resizeAmbientOcclusionBuffers();    }    return _occlusionFramebuffer;} gpu::TexturePointer FramebufferCache::getOcclusionTexture() {    if (!_occlusionTexture) {        resizeAmbientOcclusionBuffers();    }    return _occlusionTexture;} gpu::FramebufferPointer FramebufferCache::getOcclusionBlurredFramebuffer() {    if (!_occlusionBlurredFramebuffer) {        resizeAmbientOcclusionBuffers();    }    return _occlusionBlurredFramebuffer;} gpu::TexturePointer FramebufferCache::getOcclusionBlurredTexture() {    if (!_occlusionBlurredTexture) {        resizeAmbientOcclusionBuffers();    }    return _occlusionBlurredTexture;}