////  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 <gpu/GPUConfig.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;        _primaryFramebuffer.reset();        _primaryDepthTexture.reset();        _primaryColorTexture.reset();        _primaryNormalTexture.reset();        _primarySpecularTexture.reset();    }} void FramebufferCache::createPrimaryFramebuffer() {    _primaryFramebuffer = gpu::FramebufferPointer(gpu::Framebuffer::create());     auto colorFormat = gpu::Element(gpu::VEC4, gpu::NUINT8, gpu::RGBA);    auto width = _frameBufferSize.width();    auto height = _frameBufferSize.height();     auto defaultSampler = gpu::Sampler(gpu::Sampler::FILTER_MIN_MAG_POINT);    _primaryColorTexture = gpu::TexturePointer(gpu::Texture::create2D(colorFormat, width, height, defaultSampler));    _primaryNormalTexture = gpu::TexturePointer(gpu::Texture::create2D(colorFormat, width, height, defaultSampler));    _primarySpecularTexture = gpu::TexturePointer(gpu::Texture::create2D(colorFormat, width, height, defaultSampler));     _primaryFramebuffer->setRenderBuffer(0, _primaryColorTexture);    _primaryFramebuffer->setRenderBuffer(1, _primaryNormalTexture);    _primaryFramebuffer->setRenderBuffer(2, _primarySpecularTexture);      auto depthFormat = gpu::Element(gpu::SCALAR, gpu::FLOAT, gpu::DEPTH);    _primaryDepthTexture = gpu::TexturePointer(gpu::Texture::create2D(depthFormat, width, height, defaultSampler));     _primaryFramebuffer->setDepthStencilBuffer(_primaryDepthTexture, depthFormat);} gpu::FramebufferPointer FramebufferCache::getPrimaryFramebuffer() {    if (!_primaryFramebuffer) {        createPrimaryFramebuffer();    }    return _primaryFramebuffer;}   gpu::TexturePointer FramebufferCache::getPrimaryDepthTexture() {    if (!_primaryDepthTexture) {        createPrimaryFramebuffer();    }    return _primaryDepthTexture;} gpu::TexturePointer FramebufferCache::getPrimaryColorTexture() {    if (!_primaryColorTexture) {        createPrimaryFramebuffer();    }    return _primaryColorTexture;} gpu::TexturePointer FramebufferCache::getPrimaryNormalTexture() {    if (!_primaryNormalTexture) {        createPrimaryFramebuffer();    }    return _primaryNormalTexture;} gpu::TexturePointer FramebufferCache::getPrimarySpecularTexture() {    if (!_primarySpecularTexture) {        createPrimaryFramebuffer();    }    return _primarySpecularTexture;} void FramebufferCache::setPrimaryDrawBuffers(gpu::Batch& batch, bool color, bool normal, bool specular) {    GLenum buffers[3];    int bufferCount = 0;    if (color) {        buffers[bufferCount++] = GL_COLOR_ATTACHMENT0;    }    if (normal) {        buffers[bufferCount++] = GL_COLOR_ATTACHMENT1;    }    if (specular) {        buffers[bufferCount++] = GL_COLOR_ATTACHMENT2;    }    batch._glDrawBuffers(bufferCount, buffers);}  gpu::FramebufferPointer FramebufferCache::getFramebuffer() {    if (_cachedFramebuffers.isEmpty()) {        _cachedFramebuffers.push_back(gpu::FramebufferPointer(gpu::Framebuffer::create(gpu::Element::COLOR_RGBA_32, _frameBufferSize.width(), _frameBufferSize.height())));    }    gpu::FramebufferPointer result = _cachedFramebuffers.front();    _cachedFramebuffers.pop_front();    return result;}  void FramebufferCache::releaseFramebuffer(const gpu::FramebufferPointer& framebuffer) {    _cachedFramebuffers.push_back(framebuffer);} gpu::FramebufferPointer FramebufferCache::getShadowFramebuffer() {    if (!_shadowFramebuffer) {        const int SHADOW_MAP_SIZE = 2048;        _shadowFramebuffer = gpu::FramebufferPointer(gpu::Framebuffer::createShadowmap(SHADOW_MAP_SIZE));    }    return _shadowFramebuffer;}