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- /*
- * Bael'Zharon's Respite
- * Copyright (C) 2014 Daniel Skorupski
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #include "graphics/Renderer.h"
- #include "graphics/LandRenderer.h"
- #include "graphics/ModelRenderer.h"
- #include "graphics/SkyRenderer.h"
- #include "graphics/StructureRenderer.h"
- #include "Camera.h"
- #include "Config.h"
- #include "Core.h"
- #include "util.h"
- #include <glm/gtc/matrix_transform.hpp>
- #ifdef OCULUSVR
- #include <SDL_syswm.h>
- #include <algorithm>
- #endif
- Renderer::Renderer() : videoInit_(false), window_(nullptr), context_(nullptr)
- #ifdef OCULUSVR
- , hmd_(nullptr), renderTex_(0), depthTex_(0), framebuffer_(0)
- #endif
- {
- if(SDL_InitSubSystem(SDL_INIT_VIDEO) < 0)
- {
- throwSDLError();
- }
- videoInit_ = true;
- #ifdef __APPLE__
- // Apple's drivers don't support the compatibility profile on GL >v2.1
- SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
- #endif
- // 32 crashes mysteriously on my laptop
- SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
- Config& config = Core::get().config();
- int multisamples = config.getInt("Renderer.multisamples", 16);
- if(multisamples != 0)
- {
- // Enable MSAA
- SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
- SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, multisamples);
- }
- createWindow();
- context_ = SDL_GL_CreateContext(window_);
- if(context_ == nullptr)
- {
- throwSDLError();
- }
- #ifdef _MSC_VER
- GLenum glewErr = glewInit();
- if(glewErr != GLEW_OK)
- {
- string err("Unable to initialize GLEW: ");
- err.append((const char*)glewGetErrorString(glewErr));
- throw runtime_error(err);
- }
- #endif
- fieldOfView_ = config.getFloat("Renderer.fieldOfView", 90.0);
- string textureFiltering = config.getString("Renderer.textureFiltering", "trilinear");
- if(textureFiltering == "bilinear")
- {
- textureMinFilter_ = GL_LINEAR_MIPMAP_NEAREST;
- }
- else if(textureFiltering == "trilinear")
- {
- textureMinFilter_ = GL_LINEAR_MIPMAP_LINEAR;
- }
- else
- {
- throw runtime_error("Bad value for Renderer.textureFiltering");
- }
- textureMaxAnisotropy_ = static_cast<GLfloat>(config.getFloat("Renderer.anisotropyLevel", 0.0));
- if(textureMaxAnisotropy_ != 0.0f)
- {
- #ifdef _MSC_VER
- if(!GLEW_EXT_texture_filter_anisotropic)
- {
- throw runtime_error("Anisotropic filtering not supported");
- }
- #endif
- GLfloat driverMaxAnisotropy;
- glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &driverMaxAnisotropy);
- if(textureMaxAnisotropy_ < 0.0f || textureMaxAnisotropy_ > driverMaxAnisotropy)
- {
- throw runtime_error("Bad value for Renderer.maxAnisotropyLevel");
- }
- }
- renderHitGeometry_ = config.getBool("Renderer.renderHitGeometry", false);
- }
- Renderer::~Renderer()
- {
- modelRenderer_.reset();
- landRenderer_.reset();
- structureRenderer_.reset();
- skyRenderer_.reset();
- #ifdef OCULUSVR
- cleanupOVR();
- #endif
- if(context_ != nullptr)
- {
- SDL_GL_DeleteContext(context_);
- }
- if(window_ != nullptr)
- {
- SDL_DestroyWindow(window_);
- }
- if(videoInit_)
- {
- SDL_QuitSubSystem(SDL_INIT_VIDEO);
- }
- }
- void Renderer::init()
- {
- #ifdef OCULUSVR
- initOVR();
- #endif
- SDL_GL_SetSwapInterval(1); // vsync
- glEnable(GL_DEPTH_TEST);
- glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
- //glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // the default is 4
- glEnable(GL_PRIMITIVE_RESTART);
- glPrimitiveRestartIndex(0xFFFF);
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- skyRenderer_.reset(new SkyRenderer());
- landRenderer_.reset(new LandRenderer());
- structureRenderer_.reset(new StructureRenderer());
- modelRenderer_.reset(new ModelRenderer());
- landRenderer_->setLightPosition(skyRenderer_->sunVector() * fp_t(1000.0));
- }
- void Renderer::render(fp_t interp)
- {
- UNUSED(interp);
- #ifdef OCULUSVR
- if(hmd_ != nullptr)
- {
- return renderOVR(interp);
- }
- #endif
- int windowWidth, windowHeight;
- SDL_GetWindowSize(window_, &windowWidth, &windowHeight);
- // projection * view * model * vertex
- glm::mat4 projectionMat = glm::perspective(fieldOfView_ / fp_t(180.0) * pi(), static_cast<fp_t>(windowWidth) / static_cast<fp_t>(windowHeight), fp_t(0.1), fp_t(1000.0));
- const glm::mat4& viewMat = Core::get().camera().viewMatrix();
- glClear(GL_DEPTH_BUFFER_BIT);
- skyRenderer_->render();
- landRenderer_->render(projectionMat, viewMat);
- structureRenderer_->render(projectionMat, viewMat);
- modelRenderer_->render(projectionMat, viewMat);
- SDL_GL_SwapWindow(window_);
- }
- GLenum Renderer::textureMinFilter() const
- {
- return textureMinFilter_;
- }
- GLfloat Renderer::textureMaxAnisotropy() const
- {
- return textureMaxAnisotropy_;
- }
- bool Renderer::renderHitGeometry() const
- {
- return renderHitGeometry_;
- }
- void Renderer::createWindow()
- {
- Config& config = Core::get().config();
- int displayNum = config.getInt("Renderer.displayNum", 0);
- string windowMode = config.getString("Renderer.windowMode", "windowed");
- int width = config.getInt("Renderer.width", 1024);
- int height = config.getInt("Renderer.height", 768);
- if(displayNum < 0 || displayNum >= SDL_GetNumVideoDisplays())
- {
- throw runtime_error("Bad value for Renderer.displayNum");
- }
- SDL_Rect displayBounds;
- SDL_GetDisplayBounds(displayNum, &displayBounds);
- SDL_Rect windowBounds;
- Uint32 windowFlags = SDL_WINDOW_OPENGL;
- if(windowMode == "fullscreen")
- {
- windowBounds.x = displayBounds.x;
- windowBounds.y = displayBounds.y;
- windowBounds.w = width;
- windowBounds.h = height;
- windowFlags |= SDL_WINDOW_FULLSCREEN;
- }
- else if(windowMode == "fullscreenDesktop")
- {
- windowBounds = displayBounds;
- windowFlags |= SDL_WINDOW_BORDERLESS;
- }
- else if(windowMode == "windowed")
- {
- windowBounds.x = displayBounds.x + (displayBounds.w - width) / 2;
- windowBounds.y = displayBounds.y + (displayBounds.h - height) / 2;
- windowBounds.w = width;
- windowBounds.h = height;
- }
- else
- {
- throw runtime_error("Bad value for Renderer.windowMode");
- }
- window_ = SDL_CreateWindow("Bael'Zharon's Respite",
- windowBounds.x, windowBounds.y, windowBounds.w, windowBounds.h, windowFlags);
- if(window_ == nullptr)
- {
- throwSDLError();
- }
- }
- #ifdef OCULUSVR
- static glm::quat convertOvrQuatf(const ovrQuatf& quat)
- {
- return glm::quat{quat.w, quat.x, quat.y, quat.z};
- }
- static glm::vec3 convertOvrVector3f(const ovrVector3f& vec)
- {
- // ovr has +x right, +y up, and +z back
- // we have +x right, +y forward, +z up,
- return glm::vec3{vec.x, -vec.z, vec.y};
- }
- static glm::mat4 convertOvrMatrix4f(const ovrMatrix4f& mat)
- {
- glm::mat4 result;
- for(int j = 0; j < 4; j++)
- {
- for(int i = 0; i < 4; i++)
- {
- result[i][j] = mat.M[i][j];
- }
- }
- return result;
- }
- void Renderer::initOVR()
- {
- ovr_Initialize();
- Config& config = Core::get().config();
- if(!config.getBool("Renderer.OVR", false))
- {
- return;
- }
- hmd_ = ovrHmd_Create(0);
- if(!hmd_)
- {
- fprintf(stderr, "Failed to create OVR HMD, falling back to fake one\n");
- hmd_ = ovrHmd_CreateDebug(ovrHmd_DK2);
- }
- ovrSizei leftEyeTexSize = ovrHmd_GetFovTextureSize(hmd_, ovrEye_Left, hmd_->DefaultEyeFov[ovrEye_Left], 1.0f);
- ovrSizei rightEyeTexSize = ovrHmd_GetFovTextureSize(hmd_, ovrEye_Right, hmd_->DefaultEyeFov[ovrEye_Right], 1.0f);
- renderTexSize_.w = leftEyeTexSize.w + rightEyeTexSize.w;
- renderTexSize_.h = max(leftEyeTexSize.h, rightEyeTexSize.h);
- glGenTextures(1, &renderTex_);
- glBindTexture(GL_TEXTURE_2D, renderTex_);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, renderTexSize_.w, renderTexSize_.h, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &renderTexSize_.w);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &renderTexSize_.h);
- glGenTextures(1, &depthTex_);
- glBindTexture(GL_TEXTURE_2D, depthTex_);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT24, renderTexSize_.w, renderTexSize_.h, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, nullptr);
- eyeViewport_[ovrEye_Left].Pos.x = 0;
- eyeViewport_[ovrEye_Left].Pos.y = 0;
- eyeViewport_[ovrEye_Left].Size.w = renderTexSize_.w / 2;
- eyeViewport_[ovrEye_Left].Size.h = renderTexSize_.h;
- eyeViewport_[ovrEye_Right].Pos.x = renderTexSize_.w / 2;
- eyeViewport_[ovrEye_Right].Pos.y = 0;
- eyeViewport_[ovrEye_Right].Size.w = renderTexSize_.w / 2;
- eyeViewport_[ovrEye_Right].Size.h = renderTexSize_.h;
- eyeTexture_[ovrEye_Left].OGL.Header.API = ovrRenderAPI_OpenGL;
- eyeTexture_[ovrEye_Left].OGL.Header.TextureSize = renderTexSize_;
- eyeTexture_[ovrEye_Left].OGL.Header.RenderViewport = eyeViewport_[ovrEye_Left];
- eyeTexture_[ovrEye_Left].OGL.TexId = renderTex_;
- eyeTexture_[ovrEye_Right].OGL.Header.API = ovrRenderAPI_OpenGL;
- eyeTexture_[ovrEye_Right].OGL.Header.TextureSize = renderTexSize_;
- eyeTexture_[ovrEye_Right].OGL.Header.RenderViewport = eyeViewport_[ovrEye_Right];
- eyeTexture_[ovrEye_Right].OGL.TexId = renderTex_;
- ovrSizei targetSize;
- SDL_GetWindowSize(window_, &targetSize.w, &targetSize.h);
- SDL_SysWMinfo wmInfo;
- SDL_VERSION(&wmInfo.version);
- if(!SDL_GetWindowWMInfo(window_, &wmInfo))
- {
- throw runtime_error("Failed to get window info");
- }
- ovrGLConfig cfg;
- cfg.OGL.Header.API = ovrRenderAPI_OpenGL;
- cfg.OGL.Header.RTSize = targetSize;
- cfg.OGL.Header.Multisample = 1; // yes?
- #if defined(OVR_OS_WIN32)
- cfg.OGL.Window = wmInfo.info.win.window;
- cfg.OGL.DC = GetDC(wmInfo.info.win.window);
- #elif defined(OVR_OS_MAC)
- // Mac does not have any fields
- #else
- #error Implement for this OS.
- #endif
- unsigned int distortionCaps = ovrDistortionCap_Chromatic|ovrDistortionCap_TimeWarp|ovrDistortionCap_Overdrive;
- if(!ovrHmd_ConfigureRendering(hmd_, &cfg.Config, distortionCaps, hmd_->DefaultEyeFov, eyeRenderDesc_))
- {
- throw runtime_error("Failed to configure HMD rendering");
- }
- #ifdef OVR_OS_WIN32
- if(!ovrHmd_AttachToWindow(hmd_, wmInfo.info.win.window, nullptr, nullptr))
- {
- throw runtime_error("Failed to attach HMD to window");
- }
- #endif
- glGenFramebuffers(1, &framebuffer_);
- glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_);
- glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, renderTex_, 0);
- glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthTex_, 0);
- if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
- {
- throw runtime_error("Framebuffer not complete");
- }
- glBindFramebuffer(GL_FRAMEBUFFER, 0);
- unsigned int trackingCaps = ovrTrackingCap_Orientation|ovrTrackingCap_Position;
- if(!ovrHmd_ConfigureTracking(hmd_, trackingCaps, 0))
- {
- throw runtime_error("Failed to configure HMD tracking");
- }
- // warning will disappear as soon as the timeout expires
- ovrHmd_DismissHSWDisplay(hmd_);
- }
- void Renderer::cleanupOVR()
- {
- if(hmd_)
- {
- glDeleteFramebuffers(1, &framebuffer_);
- glDeleteTextures(1, &renderTex_);
- glDeleteTextures(1, &depthTex_);
- ovrHmd_Destroy(hmd_);
- }
- ovr_Shutdown();
- }
- void Renderer::renderOVR(fp_t interp)
- {
- UNUSED(interp);
- ovrHmd_BeginFrame(hmd_, 0);
- glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_);
- glClear(GL_DEPTH_BUFFER_BIT);
- ovrPosef eyePose[ovrEye_Count];
- for(int i = 0; i < ovrEye_Count; i++)
- {
- ovrEyeType eye = hmd_->EyeRenderOrder[i];
- glViewport(eyeViewport_[eye].Pos.x, eyeViewport_[eye].Pos.y,
- eyeViewport_[eye].Size.w, eyeViewport_[eye].Size.h);
- glm::mat4 projectionMat = convertOvrMatrix4f(ovrMatrix4f_Projection(eyeRenderDesc_[eye].Fov, 0.1f, 1000.0f, /*rightHanded*/ true));
- eyePose[eye] = ovrHmd_GetEyePose(hmd_, eye);
- Core::get().camera().setHeadPosition(convertOvrVector3f(eyePose[eye].Position));
- Core::get().camera().setHeadRotation(glm::conjugate(convertOvrQuatf(eyePose[eye].Orientation)));
- glm::mat4 viewMat = glm::translate(glm::mat4{}, convertOvrVector3f(eyeRenderDesc_[eye].ViewAdjust));
- viewMat = viewMat * Core::get().camera().viewMatrix();
- skyRenderer_->render();
- landRenderer_->render(projectionMat, viewMat);
- structureRenderer_->render(projectionMat, viewMat);
- modelRenderer_->render(projectionMat, viewMat);
- }
- glBindFramebuffer(GL_FRAMEBUFFER, 0);
- ovrHmd_EndFrame(hmd_, eyePose, (ovrTexture*)eyeTexture_);
- }
- #endif
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