2016-07-26 19:27:02 +00:00
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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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2016-07-27 08:23:36 +00:00
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** Copyright 2016 Magnus Norddahl
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2016-07-26 19:27:02 +00:00
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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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** 4. When not used as part of GZDoom or a GZDoom derivative, this code will be
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** covered by the terms of the GNU Lesser General Public License as published
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** by the Free Software Foundation; either version 2.1 of the License, or (at
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** your option) any later version.
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** 5. Full disclosure of the entire project's source code, except for third
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** party libraries is mandatory. (NOTE: This clause is non-negotiable!)
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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/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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2016-08-17 21:18:47 +00:00
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#include "gl/system/gl_debug.h"
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2016-07-26 19:27:02 +00:00
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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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2016-07-30 13:33:30 +00:00
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CVAR(Int, gl_multisample, 1, CVAR_ARCHIVE|CVAR_GLOBALCONFIG);
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2016-09-02 22:36:23 +00:00
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CVAR(Bool, gl_renderbuffers, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
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2016-07-29 19:31:20 +00:00
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2016-07-26 19:27:02 +00:00
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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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2016-08-27 04:24:36 +00:00
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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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2016-07-26 19:27:02 +00:00
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*)&mOutputFB);
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2016-08-17 15:59:47 +00:00
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glGetIntegerv(GL_MAX_SAMPLES, &mMaxSamples);
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2016-07-26 19:27:02 +00:00
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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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2016-07-30 13:33:30 +00:00
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ClearScene();
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2016-08-04 15:16:49 +00:00
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ClearPipeline();
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2016-09-07 18:31:42 +00:00
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ClearEyeBuffers();
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2016-07-30 13:33:30 +00:00
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ClearBloom();
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2016-07-27 19:50:30 +00:00
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}
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2016-07-30 13:33:30 +00:00
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void FGLRenderBuffers::ClearScene()
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{
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DeleteFrameBuffer(mSceneFB);
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DeleteRenderBuffer(mSceneMultisample);
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DeleteRenderBuffer(mSceneDepthStencil);
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DeleteRenderBuffer(mSceneDepth);
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DeleteRenderBuffer(mSceneStencil);
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}
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2016-08-04 15:16:49 +00:00
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void FGLRenderBuffers::ClearPipeline()
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2016-07-30 13:33:30 +00:00
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{
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2016-08-04 15:16:49 +00:00
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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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2016-07-30 13:33:30 +00:00
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}
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void FGLRenderBuffers::ClearBloom()
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2016-07-27 19:50:30 +00:00
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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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2016-07-29 19:31:20 +00:00
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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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2016-07-27 19:50:30 +00:00
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level = FGLBloomTextureLevel();
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}
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2016-07-26 19:27:02 +00:00
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}
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2016-09-07 18:31:42 +00:00
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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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2016-09-07 19:52:43 +00:00
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for (auto handle : mEyeTextures)
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DeleteTexture(handle);
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2016-09-07 18:31:42 +00:00
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mEyeTextures.Clear();
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mEyeFBs.Clear();
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}
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2016-07-29 19:31:20 +00:00
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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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2016-07-26 19:27:02 +00:00
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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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2016-08-28 16:07:44 +00:00
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bool FGLRenderBuffers::Setup(int width, int height, int sceneWidth, int sceneHeight)
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2016-07-26 19:27:02 +00:00
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{
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2016-09-02 22:13:05 +00:00
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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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2016-09-02 22:36:23 +00:00
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GLRenderer->mShaderManager->ResetFixedColormap();
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2016-09-02 22:13:05 +00:00
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}
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2016-08-06 21:42:37 +00:00
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if (!IsEnabled())
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2016-08-28 16:07:44 +00:00
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return false;
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2016-08-13 16:43:30 +00:00
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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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2016-08-06 21:42:37 +00:00
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2016-08-17 15:59:47 +00:00
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int samples = clamp((int)gl_multisample, 0, mMaxSamples);
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2016-07-30 13:33:30 +00:00
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2016-08-13 20:24:21 +00:00
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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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2016-07-30 13:33:30 +00:00
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if (width == mWidth && height == mHeight && mSamples != samples)
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{
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CreateScene(mWidth, mHeight, samples);
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mSamples = samples;
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}
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2016-08-12 15:44:59 +00:00
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else if (width != mWidth || height != mHeight)
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2016-07-30 13:33:30 +00:00
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{
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2016-08-04 15:16:49 +00:00
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CreatePipeline(width, height);
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2016-07-30 13:33:30 +00:00
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CreateScene(width, height, samples);
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mWidth = width;
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mHeight = height;
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mSamples = samples;
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}
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2016-08-12 15:44:59 +00:00
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// Bloom bluring buffers need to match the scene to avoid bloom bleeding artifacts
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if (mBloomWidth != sceneWidth || mBloomHeight != sceneHeight)
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{
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CreateBloom(sceneWidth, sceneHeight);
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mBloomWidth = sceneWidth;
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mBloomHeight = sceneHeight;
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}
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2016-08-17 19:25:31 +00:00
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glBindTexture(GL_TEXTURE_2D, textureBinding);
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2016-08-13 20:24:21 +00:00
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glActiveTexture(activeTex);
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2016-07-30 13:33:30 +00:00
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glBindRenderbuffer(GL_RENDERBUFFER, 0);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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2016-08-28 16:07:44 +00:00
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if (FailedCreate)
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{
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ClearScene();
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ClearPipeline();
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2016-09-07 18:31:42 +00:00
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ClearEyeBuffers();
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2016-08-28 16:07:44 +00:00
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ClearBloom();
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mWidth = 0;
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mHeight = 0;
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mSamples = 0;
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mBloomWidth = 0;
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mBloomHeight = 0;
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}
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return !FailedCreate;
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2016-07-30 13:33:30 +00:00
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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)
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{
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ClearScene();
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2016-07-26 19:27:02 +00:00
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2016-07-30 13:33:30 +00:00
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if (samples > 1)
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2016-09-02 22:13:05 +00:00
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mSceneMultisample = CreateRenderBuffer("SceneMultisample", GL_RGBA16F, samples, width, height);
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2016-07-26 19:27:02 +00:00
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2016-09-01 09:52:52 +00:00
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mSceneDepthStencil = CreateRenderBuffer("SceneDepthStencil", GL_DEPTH24_STENCIL8, samples, width, height);
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mSceneFB = CreateFrameBuffer("SceneFB", samples > 1 ? mSceneMultisample : mPipelineTexture[0], mSceneDepthStencil, samples > 1);
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2016-07-30 13:33:30 +00:00
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}
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//==========================================================================
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//
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2016-08-04 15:16:49 +00:00
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// Creates the buffers needed for post processing steps
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2016-07-30 13:33:30 +00:00
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//
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//==========================================================================
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2016-07-28 22:36:43 +00:00
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2016-08-04 15:16:49 +00:00
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void FGLRenderBuffers::CreatePipeline(int width, int height)
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2016-07-30 13:33:30 +00:00
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{
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2016-08-04 15:16:49 +00:00
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ClearPipeline();
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2016-09-07 18:31:42 +00:00
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ClearEyeBuffers();
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2016-08-04 15:16:49 +00:00
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for (int i = 0; i < NumPipelineTextures; i++)
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{
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2016-09-02 22:13:05 +00:00
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mPipelineTexture[i] = Create2DTexture("PipelineTexture", GL_RGBA16F, width, height);
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2016-08-17 21:18:47 +00:00
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mPipelineFB[i] = CreateFrameBuffer("PipelineFB", mPipelineTexture[i]);
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2016-08-04 15:16:49 +00:00
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}
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2016-07-30 13:33:30 +00:00
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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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2016-08-13 16:43:30 +00:00
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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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2016-07-28 22:36:43 +00:00
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2016-07-27 19:50:30 +00:00
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int bloomWidth = MAX(width / 2, 1);
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int bloomHeight = MAX(height / 2, 1);
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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 = MAX(bloomWidth / 2, 1);
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level.Height = MAX(bloomHeight / 2, 1);
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2016-09-02 22:13:05 +00:00
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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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2016-08-17 21:18:47 +00:00
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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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2016-07-27 19:50:30 +00:00
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bloomWidth = level.Width;
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bloomHeight = level.Height;
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}
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2016-07-30 13:33:30 +00:00
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}
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2016-07-27 19:50:30 +00:00
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2016-09-07 18:31:42 +00:00
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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() > 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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2016-09-07 19:52:43 +00:00
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while (mEyeFBs.Size() <= eye)
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2016-09-07 18:31:42 +00:00
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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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|
|
|
|
2016-07-29 19:31:20 +00:00
|
|
|
//==========================================================================
|
|
|
|
//
|
|
|
|
// Creates a 2D texture defaulting to linear filtering and clamp to edge
|
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
2016-08-17 21:18:47 +00:00
|
|
|
GLuint FGLRenderBuffers::Create2DTexture(const FString &name, GLuint format, int width, int height)
|
2016-07-29 19:31:20 +00:00
|
|
|
{
|
2016-08-28 08:12:06 +00:00
|
|
|
GLuint type = (format == GL_RGBA16F) ? GL_FLOAT : GL_UNSIGNED_BYTE;
|
2016-07-29 19:31:20 +00:00
|
|
|
GLuint handle = 0;
|
|
|
|
glGenTextures(1, &handle);
|
|
|
|
glBindTexture(GL_TEXTURE_2D, handle);
|
2016-08-17 21:18:47 +00:00
|
|
|
FGLDebug::LabelObject(GL_TEXTURE, handle, name);
|
2016-07-29 19:31:20 +00:00
|
|
|
glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, GL_RGBA, type, nullptr);
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
//==========================================================================
|
|
|
|
//
|
|
|
|
// Creates a render buffer
|
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
2016-08-17 21:18:47 +00:00
|
|
|
GLuint FGLRenderBuffers::CreateRenderBuffer(const FString &name, GLuint format, int width, int height)
|
2016-07-29 19:31:20 +00:00
|
|
|
{
|
|
|
|
GLuint handle = 0;
|
|
|
|
glGenRenderbuffers(1, &handle);
|
|
|
|
glBindRenderbuffer(GL_RENDERBUFFER, handle);
|
2016-08-17 21:18:47 +00:00
|
|
|
FGLDebug::LabelObject(GL_RENDERBUFFER, handle, name);
|
2016-07-29 19:31:20 +00:00
|
|
|
glRenderbufferStorage(GL_RENDERBUFFER, format, width, height);
|
|
|
|
return handle;
|
|
|
|
}
|
|
|
|
|
2016-08-17 21:18:47 +00:00
|
|
|
GLuint FGLRenderBuffers::CreateRenderBuffer(const FString &name, GLuint format, int samples, int width, int height)
|
2016-07-30 13:33:30 +00:00
|
|
|
{
|
|
|
|
if (samples <= 1)
|
2016-08-17 21:18:47 +00:00
|
|
|
return CreateRenderBuffer(name, format, width, height);
|
2016-07-30 13:33:30 +00:00
|
|
|
|
|
|
|
GLuint handle = 0;
|
|
|
|
glGenRenderbuffers(1, &handle);
|
|
|
|
glBindRenderbuffer(GL_RENDERBUFFER, handle);
|
2016-08-17 21:18:47 +00:00
|
|
|
FGLDebug::LabelObject(GL_RENDERBUFFER, handle, name);
|
2016-07-30 13:33:30 +00:00
|
|
|
glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, format, width, height);
|
|
|
|
return handle;
|
|
|
|
}
|
|
|
|
|
2016-07-29 19:31:20 +00:00
|
|
|
//==========================================================================
|
|
|
|
//
|
|
|
|
// Creates a frame buffer
|
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
2016-08-17 21:18:47 +00:00
|
|
|
GLuint FGLRenderBuffers::CreateFrameBuffer(const FString &name, GLuint colorbuffer)
|
2016-07-29 19:31:20 +00:00
|
|
|
{
|
|
|
|
GLuint handle = 0;
|
|
|
|
glGenFramebuffers(1, &handle);
|
|
|
|
glBindFramebuffer(GL_FRAMEBUFFER, handle);
|
2016-08-17 21:18:47 +00:00
|
|
|
FGLDebug::LabelObject(GL_FRAMEBUFFER, handle, name);
|
2016-07-29 19:31:20 +00:00
|
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorbuffer, 0);
|
2016-08-28 16:07:44 +00:00
|
|
|
if (CheckFrameBufferCompleteness())
|
|
|
|
ClearFrameBuffer(false, false);
|
2016-07-29 19:31:20 +00:00
|
|
|
return handle;
|
|
|
|
}
|
|
|
|
|
2016-08-17 21:18:47 +00:00
|
|
|
GLuint FGLRenderBuffers::CreateFrameBuffer(const FString &name, GLuint colorbuffer, GLuint depthstencil, bool colorIsARenderBuffer)
|
2016-07-29 19:31:20 +00:00
|
|
|
{
|
|
|
|
GLuint handle = 0;
|
|
|
|
glGenFramebuffers(1, &handle);
|
|
|
|
glBindFramebuffer(GL_FRAMEBUFFER, handle);
|
2016-08-17 21:18:47 +00:00
|
|
|
FGLDebug::LabelObject(GL_FRAMEBUFFER, handle, name);
|
2016-07-31 01:16:48 +00:00
|
|
|
if (colorIsARenderBuffer)
|
|
|
|
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, colorbuffer);
|
|
|
|
else
|
|
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorbuffer, 0);
|
2016-07-29 19:31:20 +00:00
|
|
|
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, depthstencil);
|
2016-08-28 16:07:44 +00:00
|
|
|
if (CheckFrameBufferCompleteness())
|
|
|
|
ClearFrameBuffer(true, true);
|
2016-07-29 19:31:20 +00:00
|
|
|
return handle;
|
|
|
|
}
|
|
|
|
|
2016-08-17 21:18:47 +00:00
|
|
|
GLuint FGLRenderBuffers::CreateFrameBuffer(const FString &name, GLuint colorbuffer, GLuint depth, GLuint stencil, bool colorIsARenderBuffer)
|
2016-07-29 19:31:20 +00:00
|
|
|
{
|
|
|
|
GLuint handle = 0;
|
|
|
|
glGenFramebuffers(1, &handle);
|
|
|
|
glBindFramebuffer(GL_FRAMEBUFFER, handle);
|
2016-08-17 21:18:47 +00:00
|
|
|
FGLDebug::LabelObject(GL_FRAMEBUFFER, handle, name);
|
2016-07-31 01:16:48 +00:00
|
|
|
if (colorIsARenderBuffer)
|
|
|
|
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, colorbuffer);
|
|
|
|
else
|
|
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorbuffer, 0);
|
2016-07-29 19:31:20 +00:00
|
|
|
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth);
|
|
|
|
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, stencil);
|
2016-08-28 16:07:44 +00:00
|
|
|
if (CheckFrameBufferCompleteness())
|
|
|
|
ClearFrameBuffer(true, true);
|
2016-07-29 19:31:20 +00:00
|
|
|
return handle;
|
|
|
|
}
|
|
|
|
|
2016-07-26 19:27:02 +00:00
|
|
|
//==========================================================================
|
|
|
|
//
|
2016-07-30 13:33:30 +00:00
|
|
|
// Verifies that the frame buffer setup is valid
|
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
2016-08-28 16:07:44 +00:00
|
|
|
bool FGLRenderBuffers::CheckFrameBufferCompleteness()
|
2016-07-30 13:33:30 +00:00
|
|
|
{
|
|
|
|
GLenum result = glCheckFramebufferStatus(GL_FRAMEBUFFER);
|
|
|
|
if (result == GL_FRAMEBUFFER_COMPLETE)
|
2016-08-28 16:07:44 +00:00
|
|
|
return true;
|
|
|
|
|
|
|
|
FailedCreate = true;
|
2016-07-30 13:33:30 +00:00
|
|
|
|
2016-08-28 16:07:44 +00:00
|
|
|
#if 0
|
2016-07-30 13:33:30 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
I_FatalError(error);
|
2016-08-28 16:07:44 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
return false;
|
2016-07-30 13:33:30 +00:00
|
|
|
}
|
|
|
|
|
2016-08-13 16:25:25 +00:00
|
|
|
//==========================================================================
|
|
|
|
//
|
|
|
|
// Clear frame buffer to make sure it never contains uninitialized data
|
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
2016-08-17 22:21:33 +00:00
|
|
|
void FGLRenderBuffers::ClearFrameBuffer(bool stencil, bool depth)
|
2016-08-13 16:25:25 +00:00
|
|
|
{
|
2016-08-13 20:24:21 +00:00
|
|
|
GLboolean scissorEnabled;
|
|
|
|
GLint stencilValue;
|
2016-08-13 16:25:25 +00:00
|
|
|
GLdouble depthValue;
|
2016-08-13 20:24:21 +00:00
|
|
|
glGetBooleanv(GL_SCISSOR_TEST, &scissorEnabled);
|
2016-08-13 16:25:25 +00:00
|
|
|
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);
|
2016-08-17 22:21:33 +00:00
|
|
|
GLenum flags = GL_COLOR_BUFFER_BIT;
|
|
|
|
if (stencil)
|
|
|
|
flags |= GL_STENCIL_BUFFER_BIT;
|
|
|
|
if (depth)
|
|
|
|
flags |= GL_DEPTH_BUFFER_BIT;
|
|
|
|
glClear(flags);
|
2016-08-13 16:25:25 +00:00
|
|
|
glClearStencil(stencilValue);
|
|
|
|
glClearDepth(depthValue);
|
|
|
|
if (scissorEnabled)
|
|
|
|
glEnable(GL_SCISSOR_TEST);
|
|
|
|
}
|
|
|
|
|
2016-07-30 13:33:30 +00:00
|
|
|
//==========================================================================
|
|
|
|
//
|
|
|
|
// Resolves the multisample frame buffer by copying it to the scene texture
|
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
|
|
|
void FGLRenderBuffers::BlitSceneToTexture()
|
|
|
|
{
|
2016-08-04 15:16:49 +00:00
|
|
|
mCurrentPipelineTexture = 0;
|
|
|
|
|
2016-07-30 13:33:30 +00:00
|
|
|
if (mSamples <= 1)
|
|
|
|
return;
|
|
|
|
|
|
|
|
glBindFramebuffer(GL_READ_FRAMEBUFFER, mSceneFB);
|
2016-08-04 15:16:49 +00:00
|
|
|
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, mPipelineFB[mCurrentPipelineTexture]);
|
2016-07-30 13:33:30 +00:00
|
|
|
glBlitFramebuffer(0, 0, mWidth, mHeight, 0, 0, mWidth, mHeight, GL_COLOR_BUFFER_BIT, GL_NEAREST);
|
2016-08-17 15:37:49 +00:00
|
|
|
|
2016-08-18 23:11:11 +00:00
|
|
|
if ((gl.flags & RFL_INVALIDATE_BUFFER) != 0)
|
2016-08-17 15:37:49 +00:00
|
|
|
{
|
|
|
|
GLenum attachments[2] = { GL_COLOR_ATTACHMENT0, GL_DEPTH_STENCIL_ATTACHMENT };
|
|
|
|
glInvalidateFramebuffer(GL_READ_FRAMEBUFFER, 2, attachments);
|
|
|
|
}
|
|
|
|
|
2016-07-30 13:33:30 +00:00
|
|
|
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
|
|
|
|
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
|
|
|
|
}
|
|
|
|
|
2016-09-07 18:31:42 +00:00
|
|
|
//==========================================================================
|
|
|
|
//
|
|
|
|
// 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]);
|
|
|
|
}
|
|
|
|
|
2016-09-07 19:52:43 +00:00
|
|
|
void FGLRenderBuffers::BindEyeFB(int eye, bool readBuffer)
|
2016-09-07 18:31:42 +00:00
|
|
|
{
|
|
|
|
CreateEyeBuffers(eye);
|
2016-09-07 19:52:43 +00:00
|
|
|
glBindFramebuffer(readBuffer ? GL_READ_FRAMEBUFFER : GL_FRAMEBUFFER, mEyeFBs[eye]);
|
2016-09-07 18:31:42 +00:00
|
|
|
}
|
|
|
|
|
2016-07-30 13:33:30 +00:00
|
|
|
//==========================================================================
|
|
|
|
//
|
|
|
|
// Makes the scene frame buffer active (multisample, depth, stecil, etc.)
|
2016-07-26 19:27:02 +00:00
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
|
|
|
void FGLRenderBuffers::BindSceneFB()
|
|
|
|
{
|
|
|
|
glBindFramebuffer(GL_FRAMEBUFFER, mSceneFB);
|
|
|
|
}
|
|
|
|
|
2016-07-30 13:33:30 +00:00
|
|
|
//==========================================================================
|
|
|
|
//
|
2016-08-04 15:16:49 +00:00
|
|
|
// Binds the current scene/effect/hud texture to the specified texture unit
|
2016-07-30 13:33:30 +00:00
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
2016-08-04 15:16:49 +00:00
|
|
|
void FGLRenderBuffers::BindCurrentTexture(int index)
|
2016-07-30 13:33:30 +00:00
|
|
|
{
|
2016-08-04 15:16:49 +00:00
|
|
|
glActiveTexture(GL_TEXTURE0 + index);
|
2016-08-27 04:24:36 +00:00
|
|
|
glBindTexture(GL_TEXTURE_2D, mPipelineTexture[mCurrentPipelineTexture]);
|
2016-07-30 13:33:30 +00:00
|
|
|
}
|
|
|
|
|
2016-07-28 22:36:43 +00:00
|
|
|
//==========================================================================
|
|
|
|
//
|
2016-08-04 15:16:49 +00:00
|
|
|
// Makes the frame buffer for the current texture active
|
2016-07-28 22:36:43 +00:00
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
2016-08-04 15:16:49 +00:00
|
|
|
void FGLRenderBuffers::BindCurrentFB()
|
2016-07-28 22:36:43 +00:00
|
|
|
{
|
2016-08-04 15:16:49 +00:00
|
|
|
glBindFramebuffer(GL_FRAMEBUFFER, mPipelineFB[mCurrentPipelineTexture]);
|
2016-07-28 22:36:43 +00:00
|
|
|
}
|
|
|
|
|
2016-07-26 19:27:02 +00:00
|
|
|
//==========================================================================
|
|
|
|
//
|
2016-08-04 15:16:49 +00:00
|
|
|
// Makes the frame buffer for the next texture active
|
2016-07-26 19:27:02 +00:00
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
2016-08-04 15:16:49 +00:00
|
|
|
void FGLRenderBuffers::BindNextFB()
|
2016-07-26 19:27:02 +00:00
|
|
|
{
|
2016-08-04 15:16:49 +00:00
|
|
|
int out = (mCurrentPipelineTexture + 1) % NumPipelineTextures;
|
|
|
|
glBindFramebuffer(GL_FRAMEBUFFER, mPipelineFB[out]);
|
2016-07-26 19:27:02 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
//==========================================================================
|
|
|
|
//
|
2016-08-04 15:16:49 +00:00
|
|
|
// Next pipeline texture now contains the output
|
2016-07-26 19:27:02 +00:00
|
|
|
//
|
|
|
|
//==========================================================================
|
|
|
|
|
2016-08-04 15:16:49 +00:00
|
|
|
void FGLRenderBuffers::NextTexture()
|
2016-07-26 19:27:02 +00:00
|
|
|
{
|
2016-08-04 15:16:49 +00:00
|
|
|
mCurrentPipelineTexture = (mCurrentPipelineTexture + 1) % NumPipelineTextures;
|
2016-07-26 19:27:02 +00:00
|
|
|
}
|
2016-07-28 22:36:43 +00:00
|
|
|
|
|
|
|
//==========================================================================
|
|
|
|
//
|
2016-08-04 15:16:49 +00:00
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// Makes the screen frame buffer active
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2016-07-28 22:36:43 +00:00
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//
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|
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//==========================================================================
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2016-08-04 15:16:49 +00:00
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void FGLRenderBuffers::BindOutputFB()
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2016-07-28 22:36:43 +00:00
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{
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2016-08-04 15:16:49 +00:00
|
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glBindFramebuffer(GL_FRAMEBUFFER, mOutputFB);
|
2016-07-29 19:31:20 +00:00
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}
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|
//==========================================================================
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|
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//
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|
// Returns true if render buffers are supported and should be used
|
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|
|
//
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|
|
|
//==========================================================================
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|
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bool FGLRenderBuffers::IsEnabled()
|
|
|
|
{
|
2016-09-02 22:13:05 +00:00
|
|
|
return BuffersActive && !gl.legacyMode && !FailedCreate;
|
2016-07-28 22:36:43 +00:00
|
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|
}
|
2016-08-28 16:07:44 +00:00
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|
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bool FGLRenderBuffers::FailedCreate = false;
|
2016-09-02 22:13:05 +00:00
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|
|
bool FGLRenderBuffers::BuffersActive = false;
|