////  ToneMappingEffect.cpp//  libraries/render-utils/src////  Created by Sam Gateau on 12/7/2015.//  Copyright 2015 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 "ToneMappingEffect.h" #include <gpu/Context.h>#include <gpu/StandardShaderLib.h> #include <RenderArgs.h> #include "FramebufferCache.h" #include "toneMapping_frag.h" const int ToneMappingEffect_ParamsSlot = 0;const int ToneMappingEffect_LightingMapSlot = 0; ToneMappingEffect::ToneMappingEffect() {    Parameters parameters;    _parametersBuffer = gpu::BufferView(std::make_shared<gpu::Buffer>(sizeof(Parameters), (const gpu::Byte*) &parameters));} void ToneMappingEffect::init() {    auto blitPS = gpu::ShaderPointer(gpu::Shader::createPixel(std::string(toneMapping_frag)));     auto blitVS = gpu::StandardShaderLib::getDrawViewportQuadTransformTexcoordVS();    auto blitProgram = gpu::ShaderPointer(gpu::Shader::createProgram(blitVS, blitPS));     gpu::Shader::BindingSet slotBindings;    slotBindings.insert(gpu::Shader::Binding(std::string("toneMappingParamsBuffer"), ToneMappingEffect_ParamsSlot));    slotBindings.insert(gpu::Shader::Binding(std::string("colorMap"), ToneMappingEffect_LightingMapSlot));    gpu::Shader::makeProgram(*blitProgram, slotBindings);    auto blitState = std::make_shared<gpu::State>();    blitState->setColorWriteMask(true, true, true, true);    _blitLightBuffer = gpu::PipelinePointer(gpu::Pipeline::create(blitProgram, blitState));} void ToneMappingEffect::setExposure(float exposure) {    auto& params = _parametersBuffer.get<Parameters>();    if (params._exposure != exposure) {        _parametersBuffer.edit<Parameters>()._exposure = exposure;        _parametersBuffer.edit<Parameters>()._twoPowExposure = pow(2.0, exposure);    }} void ToneMappingEffect::setToneCurve(ToneCurve curve) {    auto& params = _parametersBuffer.get<Parameters>();    if (params._toneCurve != curve) {        _parametersBuffer.edit<Parameters>()._toneCurve = curve;    }} void ToneMappingEffect::render(RenderArgs* args, const gpu::TexturePointer& lightingBuffer, const gpu::FramebufferPointer& destinationFramebuffer) {    if (!_blitLightBuffer) {        init();    }    auto framebufferSize = glm::ivec2(lightingBuffer->getDimensions());    gpu::doInBatch(args->_context, [&](gpu::Batch& batch) {        batch.enableStereo(false);        batch.setFramebuffer(destinationFramebuffer);         // FIXME: Generate the Luminosity map        //batch.generateTextureMips(lightingBuffer);         batch.setViewportTransform(args->_viewport);        batch.setProjectionTransform(glm::mat4());        batch.resetViewTransform();        batch.setModelTransform(gpu::Framebuffer::evalSubregionTexcoordTransform(framebufferSize, args->_viewport));        batch.setPipeline(_blitLightBuffer);         batch.setUniformBuffer(ToneMappingEffect_ParamsSlot, _parametersBuffer);        batch.setResourceTexture(ToneMappingEffect_LightingMapSlot, lightingBuffer);        batch.draw(gpu::TRIANGLE_STRIP, 4);    });}  void ToneMappingDeferred::configure(const Config& config) {     _toneMappingEffect.setExposure(config.exposure);     _toneMappingEffect.setToneCurve((ToneMappingEffect::ToneCurve)config.curve);} void ToneMappingDeferred::run(const render::SceneContextPointer& sceneContext, const render::RenderContextPointer& renderContext, const Inputs& inputs) {     auto lightingBuffer = inputs.get0()->getRenderBuffer(0);    auto destFbo = inputs.get1();    _toneMappingEffect.render(renderContext->args, lightingBuffer, destFbo);}