mirror of
https://github.com/ZDoom/qzdoom.git
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d77718d422
No more 'variable is used uninitialized whenever switch default is taken' warnings reported by GCC/Clang
884 lines
28 KiB
C++
884 lines
28 KiB
C++
//
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//---------------------------------------------------------------------------
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//
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// Copyright(C) 2016 Magnus Norddahl
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// All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see http://www.gnu.org/licenses/
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//
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//--------------------------------------------------------------------------
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//
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/*
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** gl_renderbuffers.cpp
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** Render buffers used during rendering
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**
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*/
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#include "gl/system/gl_system.h"
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#include "files.h"
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#include "m_swap.h"
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#include "v_video.h"
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#include "gl/gl_functions.h"
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#include "vectors.h"
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#include "gl/system/gl_interface.h"
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#include "gl/system/gl_framebuffer.h"
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#include "gl/system/gl_cvars.h"
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#include "gl/system/gl_debug.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 "w_wad.h"
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#include "i_system.h"
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#include "doomerrors.h"
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#include <random>
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CVAR(Int, gl_multisample, 1, CVAR_ARCHIVE|CVAR_GLOBALCONFIG);
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CVAR(Bool, gl_renderbuffers, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
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//==========================================================================
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//
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// Initialize render buffers and textures used in rendering passes
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//
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//==========================================================================
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FGLRenderBuffers::FGLRenderBuffers()
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{
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for (int i = 0; i < NumPipelineTextures; i++)
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{
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mPipelineTexture[i] = 0;
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mPipelineFB[i] = 0;
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}
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for (int i = 0; i < NumAmbientRandomTextures; i++)
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{
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AmbientRandomTexture[i] = 0;
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}
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*)&mOutputFB);
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glGetIntegerv(GL_MAX_SAMPLES, &mMaxSamples);
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}
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//==========================================================================
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//
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// Free render buffer resources
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//
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//==========================================================================
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FGLRenderBuffers::~FGLRenderBuffers()
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{
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ClearScene();
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ClearPipeline();
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ClearEyeBuffers();
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ClearBloom();
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ClearExposureLevels();
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ClearAmbientOcclusion();
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}
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void FGLRenderBuffers::ClearScene()
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{
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DeleteFrameBuffer(mSceneFB);
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DeleteFrameBuffer(mSceneDataFB);
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if (mSceneUsesTextures)
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{
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DeleteTexture(mSceneMultisample);
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DeleteTexture(mSceneFog);
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DeleteTexture(mSceneNormal);
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DeleteTexture(mSceneDepthStencil);
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}
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else
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{
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DeleteRenderBuffer(mSceneMultisample);
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DeleteRenderBuffer(mSceneFog);
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DeleteRenderBuffer(mSceneNormal);
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DeleteRenderBuffer(mSceneDepthStencil);
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}
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}
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void FGLRenderBuffers::ClearPipeline()
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{
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for (int i = 0; i < NumPipelineTextures; i++)
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{
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DeleteFrameBuffer(mPipelineFB[i]);
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DeleteTexture(mPipelineTexture[i]);
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}
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}
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void FGLRenderBuffers::ClearBloom()
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{
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for (int i = 0; i < NumBloomLevels; i++)
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{
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auto &level = BloomLevels[i];
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DeleteFrameBuffer(level.HFramebuffer);
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DeleteFrameBuffer(level.VFramebuffer);
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DeleteTexture(level.HTexture);
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DeleteTexture(level.VTexture);
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level = FGLBloomTextureLevel();
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}
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}
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void FGLRenderBuffers::ClearExposureLevels()
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{
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for (auto &level : ExposureLevels)
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{
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DeleteTexture(level.Texture);
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DeleteFrameBuffer(level.Framebuffer);
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}
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ExposureLevels.Clear();
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DeleteTexture(ExposureTexture);
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DeleteFrameBuffer(ExposureFB);
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}
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void FGLRenderBuffers::ClearEyeBuffers()
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{
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for (auto handle : mEyeFBs)
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DeleteFrameBuffer(handle);
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for (auto handle : mEyeTextures)
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DeleteTexture(handle);
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mEyeTextures.Clear();
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mEyeFBs.Clear();
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}
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void FGLRenderBuffers::ClearAmbientOcclusion()
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{
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DeleteFrameBuffer(LinearDepthFB);
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DeleteFrameBuffer(AmbientFB0);
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DeleteFrameBuffer(AmbientFB1);
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DeleteTexture(LinearDepthTexture);
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DeleteTexture(AmbientTexture0);
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DeleteTexture(AmbientTexture1);
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for (int i = 0; i < NumAmbientRandomTextures; i++)
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DeleteTexture(AmbientRandomTexture[i]);
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}
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void FGLRenderBuffers::DeleteTexture(GLuint &handle)
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{
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if (handle != 0)
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glDeleteTextures(1, &handle);
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handle = 0;
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}
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void FGLRenderBuffers::DeleteRenderBuffer(GLuint &handle)
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{
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if (handle != 0)
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glDeleteRenderbuffers(1, &handle);
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handle = 0;
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}
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void FGLRenderBuffers::DeleteFrameBuffer(GLuint &handle)
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{
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if (handle != 0)
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glDeleteFramebuffers(1, &handle);
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handle = 0;
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}
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//==========================================================================
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//
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// Makes sure all render buffers have sizes suitable for rending at the
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// specified resolution
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//
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//==========================================================================
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bool FGLRenderBuffers::Setup(int width, int height, int sceneWidth, int sceneHeight)
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{
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if (gl_renderbuffers != BuffersActive)
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{
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if (BuffersActive)
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glBindFramebuffer(GL_FRAMEBUFFER, mOutputFB);
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BuffersActive = gl_renderbuffers;
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GLRenderer->mShaderManager->ResetFixedColormap();
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}
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if (!IsEnabled())
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return false;
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if (width <= 0 || height <= 0)
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I_FatalError("Requested invalid render buffer sizes: screen = %dx%d", width, height);
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int samples = clamp((int)gl_multisample, 0, mMaxSamples);
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bool needsSceneTextures = (gl_ssao != 0);
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GLint activeTex;
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GLint textureBinding;
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glGetIntegerv(GL_ACTIVE_TEXTURE, &activeTex);
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glActiveTexture(GL_TEXTURE0);
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glGetIntegerv(GL_TEXTURE_BINDING_2D, &textureBinding);
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if (width != mWidth || height != mHeight)
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CreatePipeline(width, height);
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if (width != mWidth || height != mHeight || mSamples != samples || mSceneUsesTextures != needsSceneTextures)
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CreateScene(width, height, samples, needsSceneTextures);
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mWidth = width;
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mHeight = height;
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mSamples = samples;
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mSceneUsesTextures = needsSceneTextures;
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// Bloom bluring buffers need to match the scene to avoid bloom bleeding artifacts
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if (mSceneWidth != sceneWidth || mSceneHeight != sceneHeight)
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{
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CreateBloom(sceneWidth, sceneHeight);
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CreateExposureLevels(sceneWidth, sceneHeight);
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CreateAmbientOcclusion(sceneWidth, sceneHeight);
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mSceneWidth = sceneWidth;
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mSceneHeight = sceneHeight;
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}
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glBindTexture(GL_TEXTURE_2D, textureBinding);
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glActiveTexture(activeTex);
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glBindRenderbuffer(GL_RENDERBUFFER, 0);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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if (FailedCreate)
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{
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ClearScene();
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ClearPipeline();
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ClearEyeBuffers();
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ClearBloom();
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ClearExposureLevels();
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mWidth = 0;
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mHeight = 0;
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mSamples = 0;
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mSceneWidth = 0;
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mSceneHeight = 0;
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}
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return !FailedCreate;
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}
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//==========================================================================
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//
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// Creates the scene buffers
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//
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//==========================================================================
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void FGLRenderBuffers::CreateScene(int width, int height, int samples, bool needsSceneTextures)
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{
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ClearScene();
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if (samples > 1)
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{
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if (needsSceneTextures)
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{
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mSceneMultisample = Create2DMultisampleTexture("SceneMultisample", GL_RGBA16F, width, height, samples, false);
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mSceneDepthStencil = Create2DMultisampleTexture("SceneDepthStencil", GL_DEPTH24_STENCIL8, width, height, samples, false);
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mSceneFog = Create2DMultisampleTexture("SceneFog", GL_RGBA8, width, height, samples, false);
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mSceneNormal = Create2DMultisampleTexture("SceneNormal", GL_RGB10_A2, width, height, samples, false);
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mSceneFB = CreateFrameBuffer("SceneFB", mSceneMultisample, 0, 0, mSceneDepthStencil, true);
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mSceneDataFB = CreateFrameBuffer("SceneGBufferFB", mSceneMultisample, mSceneFog, mSceneNormal, mSceneDepthStencil, true);
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}
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else
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{
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mSceneMultisample = CreateRenderBuffer("SceneMultisample", GL_RGBA16F, width, height, samples);
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mSceneDepthStencil = CreateRenderBuffer("SceneDepthStencil", GL_DEPTH24_STENCIL8, width, height, samples);
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mSceneFB = CreateFrameBuffer("SceneFB", mSceneMultisample, mSceneDepthStencil, true);
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mSceneDataFB = CreateFrameBuffer("SceneGBufferFB", mSceneMultisample, mSceneDepthStencil, true);
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}
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}
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else
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{
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if (needsSceneTextures)
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{
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mSceneDepthStencil = Create2DTexture("SceneDepthStencil", GL_DEPTH24_STENCIL8, width, height);
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mSceneFog = Create2DTexture("SceneFog", GL_RGBA8, width, height);
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mSceneNormal = Create2DTexture("SceneNormal", GL_RGB10_A2, width, height);
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mSceneFB = CreateFrameBuffer("SceneFB", mPipelineTexture[0], 0, 0, mSceneDepthStencil, false);
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mSceneDataFB = CreateFrameBuffer("SceneGBufferFB", mPipelineTexture[0], mSceneFog, mSceneNormal, mSceneDepthStencil, false);
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}
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else
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{
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mSceneDepthStencil = CreateRenderBuffer("SceneDepthStencil", GL_DEPTH24_STENCIL8, width, height);
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mSceneFB = CreateFrameBuffer("SceneFB", mPipelineTexture[0], mSceneDepthStencil, false);
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mSceneDataFB = CreateFrameBuffer("SceneGBufferFB", mPipelineTexture[0], mSceneDepthStencil, false);
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}
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}
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}
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//==========================================================================
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//
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// Creates the buffers needed for post processing steps
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//
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//==========================================================================
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void FGLRenderBuffers::CreatePipeline(int width, int height)
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{
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ClearPipeline();
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ClearEyeBuffers();
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for (int i = 0; i < NumPipelineTextures; i++)
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{
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mPipelineTexture[i] = Create2DTexture("PipelineTexture", GL_RGBA16F, width, height);
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mPipelineFB[i] = CreateFrameBuffer("PipelineFB", mPipelineTexture[i]);
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}
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}
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//==========================================================================
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//
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// Creates bloom pass working buffers
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//
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//==========================================================================
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void FGLRenderBuffers::CreateBloom(int width, int height)
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{
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ClearBloom();
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// No scene, no bloom!
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if (width <= 0 || height <= 0)
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return;
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int bloomWidth = (width + 1) / 2;
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int bloomHeight = (height + 1) / 2;
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for (int i = 0; i < NumBloomLevels; i++)
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{
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auto &level = BloomLevels[i];
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level.Width = (bloomWidth + 1) / 2;
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level.Height = (bloomHeight + 1) / 2;
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level.VTexture = Create2DTexture("Bloom.VTexture", GL_RGBA16F, level.Width, level.Height);
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level.HTexture = Create2DTexture("Bloom.HTexture", GL_RGBA16F, level.Width, level.Height);
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level.VFramebuffer = CreateFrameBuffer("Bloom.VFramebuffer", level.VTexture);
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level.HFramebuffer = CreateFrameBuffer("Bloom.HFramebuffer", level.HTexture);
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bloomWidth = level.Width;
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bloomHeight = level.Height;
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}
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}
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//==========================================================================
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//
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// Creates ambient occlusion working buffers
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//
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//==========================================================================
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void FGLRenderBuffers::CreateAmbientOcclusion(int width, int height)
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{
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ClearAmbientOcclusion();
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if (width <= 0 || height <= 0)
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return;
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AmbientWidth = (width + 1) / 2;
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AmbientHeight = (height + 1) / 2;
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LinearDepthTexture = Create2DTexture("LinearDepthTexture", GL_R32F, AmbientWidth, AmbientHeight);
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AmbientTexture0 = Create2DTexture("AmbientTexture0", GL_RG16F, AmbientWidth, AmbientHeight);
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AmbientTexture1 = Create2DTexture("AmbientTexture1", GL_RG16F, AmbientWidth, AmbientHeight);
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LinearDepthFB = CreateFrameBuffer("LinearDepthFB", LinearDepthTexture);
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AmbientFB0 = CreateFrameBuffer("AmbientFB0", AmbientTexture0);
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AmbientFB1 = CreateFrameBuffer("AmbientFB1", AmbientTexture1);
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// Must match quality enum in FSSAOShader::GetDefines
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double numDirections[NumAmbientRandomTextures] = { 2.0, 4.0, 8.0 };
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std::mt19937 generator(1337);
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std::uniform_real_distribution<double> distribution(0.0, 1.0);
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for (int quality = 0; quality < NumAmbientRandomTextures; quality++)
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{
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int16_t randomValues[16 * 4];
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for (int i = 0; i < 16; i++)
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{
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double angle = 2.0 * M_PI * distribution(generator) / numDirections[quality];
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double x = cos(angle);
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double y = sin(angle);
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double z = distribution(generator);
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double w = distribution(generator);
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randomValues[i * 4 + 0] = (int16_t)clamp(x * 32767.0, -32768.0, 32767.0);
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randomValues[i * 4 + 1] = (int16_t)clamp(y * 32767.0, -32768.0, 32767.0);
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randomValues[i * 4 + 2] = (int16_t)clamp(z * 32767.0, -32768.0, 32767.0);
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randomValues[i * 4 + 3] = (int16_t)clamp(w * 32767.0, -32768.0, 32767.0);
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}
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AmbientRandomTexture[quality] = Create2DTexture("AmbientRandomTexture", GL_RGBA16_SNORM, 4, 4, randomValues);
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}
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}
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//==========================================================================
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//
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// Creates camera exposure level buffers
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//
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//==========================================================================
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void FGLRenderBuffers::CreateExposureLevels(int width, int height)
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{
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ClearExposureLevels();
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int i = 0;
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do
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{
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width = MAX(width / 2, 1);
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height = MAX(height / 2, 1);
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FString textureName, fbName;
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textureName.Format("Exposure.Texture%d", i);
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fbName.Format("Exposure.Framebuffer%d", i);
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i++;
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FGLExposureTextureLevel level;
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level.Width = width;
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level.Height = height;
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level.Texture = Create2DTexture(textureName, GL_R32F, level.Width, level.Height);
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level.Framebuffer = CreateFrameBuffer(fbName, level.Texture);
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ExposureLevels.Push(level);
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} while (width > 1 || height > 1);
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ExposureTexture = Create2DTexture("Exposure.CameraTexture", GL_R32F, 1, 1);
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ExposureFB = CreateFrameBuffer("Exposure.CameraFB", ExposureTexture);
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FirstExposureFrame = true;
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}
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//==========================================================================
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//
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// Creates eye buffers if needed
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//
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//==========================================================================
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void FGLRenderBuffers::CreateEyeBuffers(int eye)
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{
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if (mEyeFBs.Size() > unsigned(eye))
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return;
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GLint activeTex, textureBinding, frameBufferBinding;
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glGetIntegerv(GL_ACTIVE_TEXTURE, &activeTex);
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glActiveTexture(GL_TEXTURE0);
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glGetIntegerv(GL_TEXTURE_BINDING_2D, &textureBinding);
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &frameBufferBinding);
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while (mEyeFBs.Size() <= unsigned(eye))
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{
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GLuint texture = Create2DTexture("EyeTexture", GL_RGBA16F, mWidth, mHeight);
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mEyeTextures.Push(texture);
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mEyeFBs.Push(CreateFrameBuffer("EyeFB", texture));
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}
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glBindTexture(GL_TEXTURE_2D, textureBinding);
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glActiveTexture(activeTex);
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glBindFramebuffer(GL_FRAMEBUFFER, frameBufferBinding);
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}
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//==========================================================================
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//
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// Creates a 2D texture defaulting to linear filtering and clamp to edge
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//
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//==========================================================================
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GLuint FGLRenderBuffers::Create2DTexture(const FString &name, GLuint format, int width, int height, const void *data)
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{
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GLuint handle = 0;
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glGenTextures(1, &handle);
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glBindTexture(GL_TEXTURE_2D, handle);
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FGLDebug::LabelObject(GL_TEXTURE, handle, name);
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GLenum dataformat = 0, datatype = 0;
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switch (format)
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{
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case GL_RGBA8: dataformat = GL_RGBA; datatype = GL_UNSIGNED_BYTE; break;
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case GL_RGBA16: dataformat = GL_RGBA; datatype = GL_UNSIGNED_SHORT; break;
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case GL_RGBA16F: dataformat = GL_RGBA; datatype = GL_FLOAT; break;
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case GL_RGBA32F: dataformat = GL_RGBA; datatype = GL_FLOAT; break;
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case GL_RGBA16_SNORM: dataformat = GL_RGBA; datatype = GL_SHORT; break;
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case GL_R32F: dataformat = GL_RED; datatype = GL_FLOAT; break;
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case GL_R16F: dataformat = GL_RED; datatype = GL_FLOAT; break;
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case GL_RG32F: dataformat = GL_RG; datatype = GL_FLOAT; break;
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case GL_RG16F: dataformat = GL_RG; datatype = GL_FLOAT; break;
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case GL_RGB10_A2: dataformat = GL_RGBA; datatype = GL_UNSIGNED_INT_10_10_10_2; break;
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case GL_DEPTH_COMPONENT24: dataformat = GL_DEPTH_COMPONENT; datatype = GL_FLOAT; break;
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case GL_STENCIL_INDEX8: dataformat = GL_STENCIL_INDEX; datatype = GL_INT; break;
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case GL_DEPTH24_STENCIL8: dataformat = GL_DEPTH_STENCIL; datatype = GL_UNSIGNED_INT_24_8; break;
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default: I_FatalError("Unknown format passed to FGLRenderBuffers.Create2DTexture");
|
|
}
|
|
|
|
glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, dataformat, datatype, data);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
|
|
return handle;
|
|
}
|
|
|
|
GLuint FGLRenderBuffers::Create2DMultisampleTexture(const FString &name, GLuint format, int width, int height, int samples, bool fixedSampleLocations)
|
|
{
|
|
GLuint handle = 0;
|
|
glGenTextures(1, &handle);
|
|
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, handle);
|
|
FGLDebug::LabelObject(GL_TEXTURE, handle, name);
|
|
glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, samples, format, width, height, fixedSampleLocations);
|
|
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, 0);
|
|
return handle;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Creates a render buffer
|
|
//
|
|
//==========================================================================
|
|
|
|
GLuint FGLRenderBuffers::CreateRenderBuffer(const FString &name, GLuint format, int width, int height)
|
|
{
|
|
GLuint handle = 0;
|
|
glGenRenderbuffers(1, &handle);
|
|
glBindRenderbuffer(GL_RENDERBUFFER, handle);
|
|
FGLDebug::LabelObject(GL_RENDERBUFFER, handle, name);
|
|
glRenderbufferStorage(GL_RENDERBUFFER, format, width, height);
|
|
return handle;
|
|
}
|
|
|
|
GLuint FGLRenderBuffers::CreateRenderBuffer(const FString &name, GLuint format, int width, int height, int samples)
|
|
{
|
|
if (samples <= 1)
|
|
return CreateRenderBuffer(name, format, width, height);
|
|
|
|
GLuint handle = 0;
|
|
glGenRenderbuffers(1, &handle);
|
|
glBindRenderbuffer(GL_RENDERBUFFER, handle);
|
|
FGLDebug::LabelObject(GL_RENDERBUFFER, handle, name);
|
|
glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, format, width, height);
|
|
return handle;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Creates a frame buffer
|
|
//
|
|
//==========================================================================
|
|
|
|
GLuint FGLRenderBuffers::CreateFrameBuffer(const FString &name, GLuint colorbuffer)
|
|
{
|
|
GLuint handle = 0;
|
|
glGenFramebuffers(1, &handle);
|
|
glBindFramebuffer(GL_FRAMEBUFFER, handle);
|
|
FGLDebug::LabelObject(GL_FRAMEBUFFER, handle, name);
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorbuffer, 0);
|
|
if (CheckFrameBufferCompleteness())
|
|
ClearFrameBuffer(false, false);
|
|
return handle;
|
|
}
|
|
|
|
GLuint FGLRenderBuffers::CreateFrameBuffer(const FString &name, GLuint colorbuffer, GLuint depthstencil, bool colorIsARenderBuffer)
|
|
{
|
|
GLuint handle = 0;
|
|
glGenFramebuffers(1, &handle);
|
|
glBindFramebuffer(GL_FRAMEBUFFER, handle);
|
|
FGLDebug::LabelObject(GL_FRAMEBUFFER, handle, name);
|
|
if (colorIsARenderBuffer)
|
|
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, colorbuffer);
|
|
else
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorbuffer, 0);
|
|
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, depthstencil);
|
|
if (CheckFrameBufferCompleteness())
|
|
ClearFrameBuffer(true, true);
|
|
return handle;
|
|
}
|
|
|
|
GLuint FGLRenderBuffers::CreateFrameBuffer(const FString &name, GLuint colorbuffer0, GLuint colorbuffer1, GLuint colorbuffer2, GLuint depthstencil, bool multisample)
|
|
{
|
|
GLuint handle = 0;
|
|
glGenFramebuffers(1, &handle);
|
|
glBindFramebuffer(GL_FRAMEBUFFER, handle);
|
|
FGLDebug::LabelObject(GL_FRAMEBUFFER, handle, name);
|
|
if (multisample)
|
|
{
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D_MULTISAMPLE, colorbuffer0, 0);
|
|
if (colorbuffer1 != 0)
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D_MULTISAMPLE, colorbuffer1, 0);
|
|
if (colorbuffer2 != 0)
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D_MULTISAMPLE, colorbuffer2, 0);
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D_MULTISAMPLE, depthstencil, 0);
|
|
}
|
|
else
|
|
{
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorbuffer0, 0);
|
|
if (colorbuffer1 != 0)
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, colorbuffer1, 0);
|
|
if (colorbuffer2 != 0)
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, colorbuffer2, 0);
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, depthstencil, 0);
|
|
}
|
|
if (CheckFrameBufferCompleteness())
|
|
ClearFrameBuffer(true, true);
|
|
return handle;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Verifies that the frame buffer setup is valid
|
|
//
|
|
//==========================================================================
|
|
|
|
bool FGLRenderBuffers::CheckFrameBufferCompleteness()
|
|
{
|
|
GLenum result = glCheckFramebufferStatus(GL_FRAMEBUFFER);
|
|
if (result == GL_FRAMEBUFFER_COMPLETE)
|
|
return true;
|
|
|
|
FailedCreate = true;
|
|
|
|
if (gl_debug_level > 0)
|
|
{
|
|
FString error = "glCheckFramebufferStatus failed: ";
|
|
switch (result)
|
|
{
|
|
default: error.AppendFormat("error code %d", (int)result); break;
|
|
case GL_FRAMEBUFFER_UNDEFINED: error << "GL_FRAMEBUFFER_UNDEFINED"; break;
|
|
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT: error << "GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT"; break;
|
|
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: error << "GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT"; break;
|
|
case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER: error << "GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER"; break;
|
|
case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER: error << "GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER"; break;
|
|
case GL_FRAMEBUFFER_UNSUPPORTED: error << "GL_FRAMEBUFFER_UNSUPPORTED"; break;
|
|
case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE: error << "GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE"; break;
|
|
case GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS: error << "GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS"; break;
|
|
}
|
|
Printf("%s\n", error.GetChars());
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Clear frame buffer to make sure it never contains uninitialized data
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::ClearFrameBuffer(bool stencil, bool depth)
|
|
{
|
|
GLboolean scissorEnabled;
|
|
GLint stencilValue;
|
|
GLdouble depthValue;
|
|
glGetBooleanv(GL_SCISSOR_TEST, &scissorEnabled);
|
|
glGetIntegerv(GL_STENCIL_CLEAR_VALUE, &stencilValue);
|
|
glGetDoublev(GL_DEPTH_CLEAR_VALUE, &depthValue);
|
|
glDisable(GL_SCISSOR_TEST);
|
|
glClearColor(0.0, 0.0, 0.0, 0.0);
|
|
glClearDepth(0.0);
|
|
glClearStencil(0);
|
|
GLenum flags = GL_COLOR_BUFFER_BIT;
|
|
if (stencil)
|
|
flags |= GL_STENCIL_BUFFER_BIT;
|
|
if (depth)
|
|
flags |= GL_DEPTH_BUFFER_BIT;
|
|
glClear(flags);
|
|
glClearStencil(stencilValue);
|
|
glClearDepth(depthValue);
|
|
if (scissorEnabled)
|
|
glEnable(GL_SCISSOR_TEST);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Resolves the multisample frame buffer by copying it to the scene texture
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BlitSceneToTexture()
|
|
{
|
|
mCurrentPipelineTexture = 0;
|
|
|
|
if (mSamples <= 1)
|
|
return;
|
|
|
|
glBindFramebuffer(GL_READ_FRAMEBUFFER, mSceneFB);
|
|
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, mPipelineFB[mCurrentPipelineTexture]);
|
|
glBlitFramebuffer(0, 0, mWidth, mHeight, 0, 0, mWidth, mHeight, GL_COLOR_BUFFER_BIT, GL_NEAREST);
|
|
|
|
if ((gl.flags & RFL_INVALIDATE_BUFFER) != 0)
|
|
{
|
|
GLenum attachments[2] = { GL_COLOR_ATTACHMENT0, GL_DEPTH_STENCIL_ATTACHMENT };
|
|
glInvalidateFramebuffer(GL_READ_FRAMEBUFFER, 2, attachments);
|
|
}
|
|
|
|
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
|
|
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Eye textures and their frame buffers
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BlitToEyeTexture(int eye)
|
|
{
|
|
CreateEyeBuffers(eye);
|
|
|
|
glBindFramebuffer(GL_READ_FRAMEBUFFER, mPipelineFB[mCurrentPipelineTexture]);
|
|
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, mEyeFBs[eye]);
|
|
glBlitFramebuffer(0, 0, mWidth, mHeight, 0, 0, mWidth, mHeight, GL_COLOR_BUFFER_BIT, GL_NEAREST);
|
|
|
|
if ((gl.flags & RFL_INVALIDATE_BUFFER) != 0)
|
|
{
|
|
GLenum attachments[2] = { GL_COLOR_ATTACHMENT0, GL_DEPTH_STENCIL_ATTACHMENT };
|
|
glInvalidateFramebuffer(GL_READ_FRAMEBUFFER, 2, attachments);
|
|
}
|
|
|
|
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
|
|
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
|
|
}
|
|
|
|
void FGLRenderBuffers::BindEyeTexture(int eye, int texunit)
|
|
{
|
|
CreateEyeBuffers(eye);
|
|
glActiveTexture(GL_TEXTURE0 + texunit);
|
|
glBindTexture(GL_TEXTURE_2D, mEyeTextures[eye]);
|
|
}
|
|
|
|
void FGLRenderBuffers::BindEyeFB(int eye, bool readBuffer)
|
|
{
|
|
CreateEyeBuffers(eye);
|
|
glBindFramebuffer(readBuffer ? GL_READ_FRAMEBUFFER : GL_FRAMEBUFFER, mEyeFBs[eye]);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Makes the scene frame buffer active (multisample, depth, stecil, etc.)
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BindSceneFB(bool sceneData)
|
|
{
|
|
glBindFramebuffer(GL_FRAMEBUFFER, sceneData ? mSceneDataFB : mSceneFB);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Binds the scene color texture to the specified texture unit
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BindSceneColorTexture(int index)
|
|
{
|
|
glActiveTexture(GL_TEXTURE0 + index);
|
|
if (mSamples > 1)
|
|
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, mSceneMultisample);
|
|
else
|
|
glBindTexture(GL_TEXTURE_2D, mPipelineTexture[0]);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Binds the scene fog data texture to the specified texture unit
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BindSceneFogTexture(int index)
|
|
{
|
|
glActiveTexture(GL_TEXTURE0 + index);
|
|
if (mSamples > 1)
|
|
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, mSceneFog);
|
|
else
|
|
glBindTexture(GL_TEXTURE_2D, mSceneFog);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Binds the scene normal data texture to the specified texture unit
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BindSceneNormalTexture(int index)
|
|
{
|
|
glActiveTexture(GL_TEXTURE0 + index);
|
|
if (mSamples > 1)
|
|
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, mSceneNormal);
|
|
else
|
|
glBindTexture(GL_TEXTURE_2D, mSceneNormal);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Binds the depth texture to the specified texture unit
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BindSceneDepthTexture(int index)
|
|
{
|
|
glActiveTexture(GL_TEXTURE0 + index);
|
|
if (mSamples > 1)
|
|
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, mSceneDepthStencil);
|
|
else
|
|
glBindTexture(GL_TEXTURE_2D, mSceneDepthStencil);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Binds the current scene/effect/hud texture to the specified texture unit
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BindCurrentTexture(int index)
|
|
{
|
|
glActiveTexture(GL_TEXTURE0 + index);
|
|
glBindTexture(GL_TEXTURE_2D, mPipelineTexture[mCurrentPipelineTexture]);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Makes the frame buffer for the current texture active
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BindCurrentFB()
|
|
{
|
|
glBindFramebuffer(GL_FRAMEBUFFER, mPipelineFB[mCurrentPipelineTexture]);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Makes the frame buffer for the next texture active
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BindNextFB()
|
|
{
|
|
int out = (mCurrentPipelineTexture + 1) % NumPipelineTextures;
|
|
glBindFramebuffer(GL_FRAMEBUFFER, mPipelineFB[out]);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Next pipeline texture now contains the output
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::NextTexture()
|
|
{
|
|
mCurrentPipelineTexture = (mCurrentPipelineTexture + 1) % NumPipelineTextures;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Makes the screen frame buffer active
|
|
//
|
|
//==========================================================================
|
|
|
|
void FGLRenderBuffers::BindOutputFB()
|
|
{
|
|
glBindFramebuffer(GL_FRAMEBUFFER, mOutputFB);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Returns true if render buffers are supported and should be used
|
|
//
|
|
//==========================================================================
|
|
|
|
bool FGLRenderBuffers::IsEnabled()
|
|
{
|
|
return BuffersActive && !gl.legacyMode && !FailedCreate;
|
|
}
|
|
|
|
bool FGLRenderBuffers::FailedCreate = false;
|
|
bool FGLRenderBuffers::BuffersActive = false;
|