mirror of
https://github.com/DrBeef/Raze.git
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95f917a408
All games combined there's 11(!!!) scene render blocks, not counting the sub-blocks for ROR and mirrors. Does it surprise anyone that most of these sub-blocks do not feature all engine capabilities?
471 lines
13 KiB
C++
471 lines
13 KiB
C++
/*
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** gl_framebuffer.cpp
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** Implementation of the non-hardware specific parts of the
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** OpenGL frame buffer
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**
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**---------------------------------------------------------------------------
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** Copyright 2010-2020 Christoph Oelckers
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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*/
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#include "gl_load/gl_system.h"
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#include "v_video.h"
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#include "m_png.h"
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#include "printf.h"
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#include "templates.h"
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#include "glbackend/glbackend.h"
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#include "gl_load/gl_interface.h"
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#include "gl/system/gl_framebuffer.h"
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#include "gl/renderer/gl_renderer.h"
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#include "gl/renderer/gl_renderbuffers.h"
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#include "hwrenderer/data/flatvertices.h"
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/*
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#include "gl/textures/gl_samplers.h"
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#include "hwrenderer/utility/hw_clock.h"
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#include "hwrenderer/utility/hw_vrmodes.h"
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#include "hwrenderer/models/hw_models.h"
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#include "hwrenderer/scene/hw_skydome.h"
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#include "hwrenderer/data/hw_viewpointbuffer.h"
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#include "hwrenderer/dynlights/hw_lightbuffer.h"
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#include "gl/shaders/gl_shaderprogram.h"
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*/
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#include "gl_debug.h"
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#include "r_videoscale.h"
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//#include "gl_buffers.h"
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//#include "hwrenderer/data/flatvertices.h"
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EXTERN_CVAR (Bool, vid_vsync)
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EXTERN_CVAR(Bool, r_drawvoxels)
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EXTERN_CVAR(Int, gl_tonemap)
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EXTERN_CVAR(Bool, gl_texture_usehires)
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EXTERN_CVAR(Int, gl_ssao)
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void gl_LoadExtensions();
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void gl_PrintStartupLog();
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//void Draw2D(F2DDrawer *drawer, FRenderState &state);
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extern bool vid_hdr_active;
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void DrawFullscreenBlends();
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namespace OpenGLRenderer
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{
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FGLRenderer *GLRenderer;
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//==========================================================================
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//
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//
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//
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//==========================================================================
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OpenGLFrameBuffer::OpenGLFrameBuffer(void *hMonitor, bool fullscreen) :
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Super(hMonitor, fullscreen)
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{
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// SetVSync needs to be at the very top to workaround a bug in Nvidia's OpenGL driver.
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// If wglSwapIntervalEXT is called after glBindFramebuffer in a frame the setting is not changed!
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Super::SetVSync(vid_vsync);
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#ifdef IMPLEMENT_IT
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// Make sure all global variables tracking OpenGL context state are reset..
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FHardwareTexture::InitGlobalState();
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gl_RenderState.Reset();
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#endif
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GLRenderer = nullptr;
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}
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OpenGLFrameBuffer::~OpenGLFrameBuffer()
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{
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PPResource::ResetAll();
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if (mVertexData != nullptr) delete mVertexData;
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#ifdef IMPLEMENT_IT
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if (mSkyData != nullptr) delete mSkyData;
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if (mViewpoints != nullptr) delete mViewpoints;
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if (mLights != nullptr) delete mLights;
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mShadowMap.Reset();
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#endif
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if (GLRenderer)
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{
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delete GLRenderer;
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GLRenderer = nullptr;
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}
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}
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//==========================================================================
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//
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// Initializes the GL renderer
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//
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//==========================================================================
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void OpenGLFrameBuffer::InitializeState()
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{
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static bool first=true;
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if (first)
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{
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if (ogl_LoadFunctions() == ogl_LOAD_FAILED)
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{
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I_FatalError("Failed to load OpenGL functions.");
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}
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}
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gl_LoadExtensions();
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// Move some state to the framebuffer object for easier access.
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hwcaps = gl.flags;
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glslversion = gl.glslversion;
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uniformblockalignment = gl.uniformblockalignment;
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maxuniformblock = gl.maxuniformblock;
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vendorstring = gl.vendorstring;
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if (first)
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{
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first=false;
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gl_PrintStartupLog();
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}
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glDepthFunc(GL_LESS);
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glEnable(GL_DITHER);
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glDisable(GL_CULL_FACE);
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glDisable(GL_POLYGON_OFFSET_FILL);
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glEnable(GL_POLYGON_OFFSET_LINE);
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glEnable(GL_BLEND);
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glEnable(GL_DEPTH_CLAMP);
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glDisable(GL_DEPTH_TEST);
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glDisable(GL_LINE_SMOOTH);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glClearDepth(1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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SetViewportRects(nullptr);
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mVertexData = new FFlatVertexBuffer(GetWidth(), GetHeight());
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#ifdef IMPLEMENT_IT
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mSkyData = new FSkyVertexBuffer;
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mViewpoints = new HWViewpointBuffer;
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mLights = new FLightBuffer();
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#endif
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GLRenderer = new FGLRenderer(this);
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GLRenderer->Initialize(GetWidth(), GetHeight());
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#ifdef IMPLEMENT_IT
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static_cast<GLDataBuffer*>(mLights->GetBuffer())->BindBase();
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#endif
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mDebug = std::make_shared<FGLDebug>();
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mDebug->Update();
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}
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//==========================================================================
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//
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// Updates the screen
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//
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//==========================================================================
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void OpenGLFrameBuffer::Update()
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{
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#if 0
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twoD.Reset();
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Flush3D.Reset();
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Flush3D.Clock();
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#endif
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GLRenderer->Flush();
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// Flush3D.Unclock();
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Swap();
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Super::Update();
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}
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const char* OpenGLFrameBuffer::DeviceName() const
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{
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return gl.modelstring;
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}
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//==========================================================================
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//
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// Swap the buffers
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//
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//==========================================================================
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CVAR(Bool, gl_finishbeforeswap, false, CVAR_ARCHIVE|CVAR_GLOBALCONFIG);
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void OpenGLFrameBuffer::Swap()
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{
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bool swapbefore = gl_finishbeforeswap && camtexcount == 0;
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//Finish.Reset();
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//Finish.Clock();
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if (swapbefore) glFinish();
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FPSLimit();
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SwapBuffers();
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if (!swapbefore) glFinish();
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//Finish.Unclock();
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camtexcount = 0;
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//FHardwareTexture::UnbindAll();
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mDebug->Update();
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}
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//==========================================================================
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//
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// Enable/disable vertical sync
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//
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//==========================================================================
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void OpenGLFrameBuffer::SetVSync(bool vsync)
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{
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// Switch to the default frame buffer because some drivers associate the vsync state with the bound FB object.
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GLint oldDrawFramebufferBinding = 0, oldReadFramebufferBinding = 0;
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glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldDrawFramebufferBinding);
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glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &oldReadFramebufferBinding);
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glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
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glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
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Super::SetVSync(vsync);
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glBindFramebuffer(GL_DRAW_FRAMEBUFFER, oldDrawFramebufferBinding);
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glBindFramebuffer(GL_READ_FRAMEBUFFER, oldReadFramebufferBinding);
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}
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//===========================================================================
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//
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//
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//===========================================================================
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void OpenGLFrameBuffer::CleanForRestart()
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{
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}
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#ifdef IMPLEMENT_IT
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void OpenGLFrameBuffer::SetTextureFilterMode()
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{
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//if (GLRenderer != nullptr && GLRenderer->mSamplerManager != nullptr) GLRenderer->mSamplerManager->SetTextureFilterMode();
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}
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IHardwareTexture *OpenGLFrameBuffer::CreateHardwareTexture()
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{
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return nullptr;// new FHardwareTexture(true/*tex->bNoCompress*/);
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}
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void OpenGLFrameBuffer::PrecacheMaterial(FMaterial *mat, int translation)
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{
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auto tex = mat->tex;
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if (tex->isSWCanvas()) return;
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// Textures that are already scaled in the texture lump will not get replaced by hires textures.
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int flags = mat->isExpanded() ? CTF_Expand : (gl_texture_usehires && !tex->isScaled()) ? CTF_CheckHires : 0;
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int numLayers = mat->GetLayers();
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auto base = static_cast<FHardwareTexture*>(mat->GetLayer(0, translation));
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if (base->BindOrCreate(tex, 0, CLAMP_NONE, translation, flags))
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{
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for (int i = 1; i < numLayers; i++)
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{
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FTexture *layer;
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auto systex = static_cast<FHardwareTexture*>(mat->GetLayer(i, 0, &layer));
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systex->BindOrCreate(layer, i, CLAMP_NONE, 0, mat->isExpanded() ? CTF_Expand : 0);
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}
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}
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// unbind everything.
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FHardwareTexture::UnbindAll();
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}
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FModelRenderer *OpenGLFrameBuffer::CreateModelRenderer(int mli)
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{
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return new FHWModelRenderer(nullptr, gl_RenderState, mli);
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}
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#endif
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IVertexBuffer *OpenGLFrameBuffer::CreateVertexBuffer()
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{
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return new GLVertexBuffer;
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}
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IIndexBuffer *OpenGLFrameBuffer::CreateIndexBuffer()
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{
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return new GLIndexBuffer;
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}
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IDataBuffer *OpenGLFrameBuffer::CreateDataBuffer(int bindingpoint, bool ssbo, bool needsresize)
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{
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return new GLDataBuffer(bindingpoint, ssbo);
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}
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#ifdef IMPLEMENT_IT
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void OpenGLFrameBuffer::TextureFilterChanged()
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{
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if (GLRenderer != NULL && GLRenderer->mSamplerManager != NULL) GLRenderer->mSamplerManager->SetTextureFilterMode();
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}
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#endif
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void OpenGLFrameBuffer::BlurScene(float amount)
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{
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GLRenderer->BlurScene(amount);
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}
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#if 0
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void OpenGLFrameBuffer::UpdatePalette()
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{
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if (GLRenderer)
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GLRenderer->ClearTonemapPalette();
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}
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#endif
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//===========================================================================
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//
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//
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//
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//===========================================================================
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void OpenGLFrameBuffer::BeginFrame()
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{
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SetViewportRects(nullptr);
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if (GLRenderer != nullptr)
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GLRenderer->BeginFrame();
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}
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//===========================================================================
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//
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// Takes a screenshot
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//
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//===========================================================================
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TArray<uint8_t> OpenGLFrameBuffer::GetScreenshotBuffer(int &pitch, ESSType &color_type, float &gamma)
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{
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const auto &viewport = mOutputLetterbox;
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// Grab what is in the back buffer.
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// We cannot rely on SCREENWIDTH/HEIGHT here because the output may have been scaled.
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TArray<uint8_t> pixels;
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pixels.Resize(viewport.width * viewport.height * 3);
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glPixelStorei(GL_PACK_ALIGNMENT, 1);
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glReadPixels(viewport.left, viewport.top, viewport.width, viewport.height, GL_RGB, GL_UNSIGNED_BYTE, &pixels[0]);
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glPixelStorei(GL_PACK_ALIGNMENT, 4);
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// Copy to screenshot buffer:
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int w = SCREENWIDTH;
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int h = SCREENHEIGHT;
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TArray<uint8_t> ScreenshotBuffer(w * h * 3, true);
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float rcpWidth = 1.0f / w;
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float rcpHeight = 1.0f / h;
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for (int y = 0; y < h; y++)
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{
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for (int x = 0; x < w; x++)
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{
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float u = (x + 0.5f) * rcpWidth;
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float v = (y + 0.5f) * rcpHeight;
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int sx = u * viewport.width;
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int sy = v * viewport.height;
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int sindex = (sx + sy * viewport.width) * 3;
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int dindex = (x + (h - y - 1) * w) * 3;
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ScreenshotBuffer[dindex] = pixels[sindex];
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ScreenshotBuffer[dindex + 1] = pixels[sindex + 1];
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ScreenshotBuffer[dindex + 2] = pixels[sindex + 2];
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}
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}
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pitch = w * 3;
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color_type = SS_RGB;
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// Screenshot should not use gamma correction if it was already applied to rendered image
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gamma = 1;
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return ScreenshotBuffer;
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}
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//===========================================================================
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//
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// 2D drawing
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//
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//===========================================================================
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void OpenGLFrameBuffer::Draw2D()
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{
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if (GLRenderer != nullptr)
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{
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GLRenderer->mBuffers->BindCurrentFB();
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::DrawFullscreenBlends();
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DrawRateStuff();
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GLInterface.Draw2D(&twodgen);
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}
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}
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void OpenGLFrameBuffer::PostProcessScene(int fixedcm, const std::function<void()> &afterBloomDrawEndScene2D)
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{
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GLRenderer->PostProcessScene(fixedcm, afterBloomDrawEndScene2D);
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}
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}
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void videoShowFrame(int32_t w)
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{
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static GLenum buffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2 };
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if (gl_ssao)
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{
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glDrawBuffers(1, buffers);
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OpenGLRenderer::GLRenderer->AmbientOccludeScene(GLInterface.GetProjectionM5());
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glViewport(screen->mSceneViewport.left, screen->mSceneViewport.top, screen->mSceneViewport.width, screen->mSceneViewport.height);
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OpenGLRenderer::GLRenderer->mBuffers->BindSceneFB(true);
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glDrawBuffers(3, buffers);
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// To do: the translucent part of the scene should be drawn here
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glDrawBuffers(1, buffers);
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}
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OpenGLRenderer::GLRenderer->mBuffers->BlitSceneToTexture(); // Copy the resulting scene to the current post process texture
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screen->PostProcessScene(0, []() {
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GLInterface.Draw2D(&twodpsp); // draws the weapon sprites
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});
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screen->Update();
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// After finishing the frame, reset everything for the next frame. This needs to be done better.
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screen->BeginFrame();
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if (gl_ssao)
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{
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OpenGLRenderer::GLRenderer->mBuffers->BindSceneFB(true);
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glDrawBuffers(3, buffers);
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}
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else
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{
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OpenGLRenderer::GLRenderer->mBuffers->BindSceneFB(false);
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}
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twodpsp.Clear();
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twodgen.Clear();
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GLInterface.ResetFrame();
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}
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