654 lines
15 KiB
C++
654 lines
15 KiB
C++
/**
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* @file llrendertarget.cpp
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* @brief LLRenderTarget implementation
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#include "linden_common.h"
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#include "llrendertarget.h"
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#include "llrender.h"
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#include "llgl.h"
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void check_framebuffer_status()
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{
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if (gDebugGL)
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{
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GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
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switch (status)
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{
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case GL_FRAMEBUFFER_COMPLETE_EXT:
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break;
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case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
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llerrs << "WTF?" << llendl;
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break;
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default:
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llerrs << "WTF?" << llendl;
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}
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}
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}
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BOOL LLRenderTarget::sUseFBO = FALSE;
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LLRenderTarget::LLRenderTarget() :
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mResX(0),
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mResY(0),
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mTex(0),
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mFBO(0),
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mDepth(0),
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mStencil(0),
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mUseDepth(FALSE),
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mRenderDepth(FALSE),
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mUsage(LLTexUnit::TT_TEXTURE),
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mSamples(0),
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mSampleBuffer(NULL)
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{
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}
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LLRenderTarget::~LLRenderTarget()
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{
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release();
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}
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void LLRenderTarget::setSampleBuffer(LLMultisampleBuffer* buffer)
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{
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mSampleBuffer = buffer;
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}
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void LLRenderTarget::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil, LLTexUnit::eTextureType usage, BOOL use_fbo)
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{
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stop_glerror();
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mResX = resx;
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mResY = resy;
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mStencil = stencil;
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mUsage = usage;
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mUseDepth = depth;
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release();
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if ((sUseFBO || use_fbo) && gGLManager.mHasFramebufferObject)
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{
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if (depth)
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{
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stop_glerror();
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allocateDepth();
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stop_glerror();
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}
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glGenFramebuffersEXT(1, (GLuint *) &mFBO);
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if (mDepth)
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{
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
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if (mStencil)
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{
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
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stop_glerror();
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
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stop_glerror();
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}
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else
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{
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
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stop_glerror();
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}
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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}
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stop_glerror();
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}
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addColorAttachment(color_fmt);
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}
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void LLRenderTarget::addColorAttachment(U32 color_fmt)
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{
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if (color_fmt == 0)
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{
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return;
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}
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U32 offset = mTex.size();
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if (offset >= 4 ||
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(offset > 0 && (mFBO == 0 || !gGLManager.mHasDrawBuffers)))
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{
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llerrs << "Too many color attachments!" << llendl;
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}
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U32 tex;
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LLImageGL::generateTextures(1, &tex);
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gGL.getTexUnit(0)->bindManual(mUsage, tex);
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stop_glerror();
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LLImageGL::setManualImage(LLTexUnit::getInternalType(mUsage), 0, color_fmt, mResX, mResY, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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stop_glerror();
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if (offset == 0)
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{
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gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_BILINEAR);
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}
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else
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{ //don't filter data attachments
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gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_POINT);
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}
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if (mUsage != LLTexUnit::TT_RECT_TEXTURE)
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{
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gGL.getTexUnit(0)->setTextureAddressMode(LLTexUnit::TAM_MIRROR);
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}
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else
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{
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// ATI doesn't support mirrored repeat for rectangular textures.
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gGL.getTexUnit(0)->setTextureAddressMode(LLTexUnit::TAM_CLAMP);
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}
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if (mFBO)
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{
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+offset,
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LLTexUnit::getInternalType(mUsage), tex, 0);
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stop_glerror();
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check_framebuffer_status();
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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}
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mTex.push_back(tex);
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}
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void LLRenderTarget::allocateDepth()
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{
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if (mStencil)
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{
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//use render buffers where stencil buffers are in play
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glGenRenderbuffersEXT(1, (GLuint *) &mDepth);
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mDepth);
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glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT, mResX, mResY);
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
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}
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else
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{
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LLImageGL::generateTextures(1, &mDepth);
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gGL.getTexUnit(0)->bindManual(mUsage, mDepth);
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U32 internal_type = LLTexUnit::getInternalType(mUsage);
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gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_POINT);
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LLImageGL::setManualImage(internal_type, 0, GL_DEPTH24_STENCIL8_EXT, mResX, mResY, GL_DEPTH_STENCIL_EXT, GL_UNSIGNED_INT_24_8_EXT, NULL);
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}
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}
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void LLRenderTarget::shareDepthBuffer(LLRenderTarget& target)
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{
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if (!mFBO || !target.mFBO)
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{
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llerrs << "Cannot share depth buffer between non FBO render targets." << llendl;
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}
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if (mDepth)
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{
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stop_glerror();
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, target.mFBO);
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stop_glerror();
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if (mStencil)
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{
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
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stop_glerror();
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
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stop_glerror();
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}
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else
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{
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
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stop_glerror();
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if (mStencil)
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{
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
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stop_glerror();
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}
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}
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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target.mUseDepth = TRUE;
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}
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}
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void LLRenderTarget::release()
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{
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if (mFBO)
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{
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glDeleteFramebuffersEXT(1, (GLuint *) &mFBO);
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mFBO = 0;
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}
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if (mTex.size() > 0)
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{
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LLImageGL::deleteTextures(mTex.size(), &mTex[0]);
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mTex.clear();
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}
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if (mDepth)
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{
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if (mStencil)
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{
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glDeleteRenderbuffersEXT(1, (GLuint*) &mDepth);
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stop_glerror();
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}
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else
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{
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LLImageGL::deleteTextures(1, &mDepth);
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stop_glerror();
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}
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mDepth = 0;
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}
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mSampleBuffer = NULL;
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}
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void LLRenderTarget::bindTarget()
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{
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if (mFBO)
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{
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stop_glerror();
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if (mSampleBuffer)
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{
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mSampleBuffer->bindTarget(this);
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stop_glerror();
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}
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else
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{
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
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stop_glerror();
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if (gGLManager.mHasDrawBuffers)
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{ //setup multiple render targets
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GLenum drawbuffers[] = {GL_COLOR_ATTACHMENT0_EXT,
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GL_COLOR_ATTACHMENT1_EXT,
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GL_COLOR_ATTACHMENT2_EXT,
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GL_COLOR_ATTACHMENT3_EXT};
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glDrawBuffersARB(mTex.size(), drawbuffers);
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}
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if (mTex.empty())
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{ //no color buffer to draw to
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glDrawBuffer(GL_NONE);
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glReadBuffer(GL_NONE);
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}
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check_framebuffer_status();
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stop_glerror();
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}
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}
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glViewport(0, 0, mResX, mResY);
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}
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// static
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void LLRenderTarget::unbindTarget()
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{
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if (gGLManager.mHasFramebufferObject)
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{
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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}
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}
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void LLRenderTarget::clear(U32 mask_in)
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{
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U32 mask = GL_COLOR_BUFFER_BIT;
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if (mUseDepth)
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{
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mask |= GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;
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}
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if (mFBO)
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{
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check_framebuffer_status();
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stop_glerror();
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glClear(mask & mask_in);
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stop_glerror();
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}
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else
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{
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LLGLEnable scissor(GL_SCISSOR_TEST);
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glScissor(0, 0, mResX, mResY);
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stop_glerror();
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glClear(mask & mask_in);
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}
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}
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U32 LLRenderTarget::getTexture(U32 attachment) const
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{
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if (attachment > mTex.size()-1)
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{
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llerrs << "Invalid attachment index." << llendl;
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}
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return mTex[attachment];
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}
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void LLRenderTarget::bindTexture(U32 index, S32 channel)
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{
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if (index > mTex.size()-1)
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{
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llerrs << "Invalid attachment index." << llendl;
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}
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gGL.getTexUnit(channel)->bindManual(mUsage, mTex[index]);
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}
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void LLRenderTarget::flush(BOOL fetch_depth)
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{
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gGL.flush();
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if (!mFBO)
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{
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gGL.getTexUnit(0)->bind(this);
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glCopyTexSubImage2D(LLTexUnit::getInternalType(mUsage), 0, 0, 0, 0, 0, mResX, mResY);
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if (fetch_depth)
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{
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if (!mDepth)
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{
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allocateDepth();
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}
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gGL.getTexUnit(0)->bind(this, true);
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glCopyTexImage2D(LLTexUnit::getInternalType(mUsage), 0, GL_DEPTH24_STENCIL8_EXT, 0, 0, mResX, mResY, 0);
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}
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gGL.getTexUnit(0)->disable();
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}
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else
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{
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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if (mSampleBuffer)
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{
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LLGLEnable multisample(GL_MULTISAMPLE_ARB);
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stop_glerror();
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
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stop_glerror();
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check_framebuffer_status();
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glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, mSampleBuffer->mFBO);
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check_framebuffer_status();
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stop_glerror();
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glBlitFramebufferEXT(0, 0, mResX, mResY, 0, 0, mResX, mResY, GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
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stop_glerror();
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if (mTex.size() > 1)
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{
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for (U32 i = 1; i < mTex.size(); ++i)
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{
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glFramebufferTexture2DEXT(GL_DRAW_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
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LLTexUnit::getInternalType(mUsage), mTex[i], 0);
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stop_glerror();
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glFramebufferRenderbufferEXT(GL_READ_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, mSampleBuffer->mTex[i]);
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stop_glerror();
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glBlitFramebufferEXT(0, 0, mResX, mResY, 0, 0, mResX, mResY, GL_COLOR_BUFFER_BIT, GL_NEAREST);
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stop_glerror();
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}
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for (U32 i = 0; i < mTex.size(); ++i)
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{
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glFramebufferTexture2DEXT(GL_DRAW_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+i,
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LLTexUnit::getInternalType(mUsage), mTex[i], 0);
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stop_glerror();
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glFramebufferRenderbufferEXT(GL_READ_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+i, GL_RENDERBUFFER_EXT, mSampleBuffer->mTex[i]);
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stop_glerror();
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}
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}
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}
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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glFlush();
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}
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}
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void LLRenderTarget::copyContents(LLRenderTarget& source, S32 srcX0, S32 srcY0, S32 srcX1, S32 srcY1,
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S32 dstX0, S32 dstY0, S32 dstX1, S32 dstY1, U32 mask, U32 filter)
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{
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if (!source.mFBO || !mFBO)
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{
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llerrs << "Cannot copy framebuffer contents for non FBO render targets." << llendl;
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}
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if (mSampleBuffer)
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{
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mSampleBuffer->copyContents(source, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
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}
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else
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{
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glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, source.mFBO);
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glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, mFBO);
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glBlitFramebufferEXT(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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}
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}
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BOOL LLRenderTarget::isComplete() const
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{
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return (!mTex.empty() || mDepth) ? TRUE : FALSE;
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}
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void LLRenderTarget::getViewport(S32* viewport)
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{
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viewport[0] = 0;
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viewport[1] = 0;
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viewport[2] = mResX;
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viewport[3] = mResY;
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}
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//==================================================
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// LLMultisampleBuffer implementation
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//==================================================
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LLMultisampleBuffer::LLMultisampleBuffer()
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{
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}
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LLMultisampleBuffer::~LLMultisampleBuffer()
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{
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releaseSampleBuffer();
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}
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void LLMultisampleBuffer::releaseSampleBuffer()
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{
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if (mFBO)
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{
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glDeleteFramebuffersEXT(1, (GLuint *) &mFBO);
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mFBO = 0;
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}
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if (mTex.size() > 0)
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{
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glDeleteRenderbuffersEXT(mTex.size(), (GLuint *) &mTex[0]);
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mTex.clear();
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}
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if (mDepth)
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{
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glDeleteRenderbuffersEXT(1, (GLuint *) &mDepth);
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mDepth = 0;
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}
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}
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void LLMultisampleBuffer::bindTarget()
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{
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bindTarget(this);
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}
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void LLMultisampleBuffer::bindTarget(LLRenderTarget* ref)
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{
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if (!ref)
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{
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ref = this;
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}
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
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if (gGLManager.mHasDrawBuffers)
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{ //setup multiple render targets
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GLenum drawbuffers[] = {GL_COLOR_ATTACHMENT0_EXT,
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GL_COLOR_ATTACHMENT1_EXT,
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GL_COLOR_ATTACHMENT2_EXT,
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GL_COLOR_ATTACHMENT3_EXT};
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glDrawBuffersARB(ref->mTex.size(), drawbuffers);
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}
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check_framebuffer_status();
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glViewport(0, 0, mResX, mResY);
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}
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void LLMultisampleBuffer::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil, LLTexUnit::eTextureType usage, BOOL use_fbo )
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{
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allocate(resx,resy,color_fmt,depth,stencil,usage,use_fbo,2);
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|
}
|
|
|
|
void LLMultisampleBuffer::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil, LLTexUnit::eTextureType usage, BOOL use_fbo, U32 samples )
|
|
{
|
|
stop_glerror();
|
|
mResX = resx;
|
|
mResY = resy;
|
|
|
|
mUsage = usage;
|
|
mUseDepth = depth;
|
|
mStencil = stencil;
|
|
|
|
releaseSampleBuffer();
|
|
|
|
if (!gGLManager.mHasFramebufferMultisample)
|
|
{
|
|
llerrs << "Attempting to allocate unsupported render target type!" << llendl;
|
|
}
|
|
|
|
mSamples = samples;
|
|
|
|
if (mSamples <= 1)
|
|
{
|
|
llerrs << "Cannot create a multisample buffer with less than 2 samples." << llendl;
|
|
}
|
|
|
|
stop_glerror();
|
|
|
|
if ((sUseFBO || use_fbo) && gGLManager.mHasFramebufferObject)
|
|
{
|
|
|
|
if (depth)
|
|
{
|
|
stop_glerror();
|
|
allocateDepth();
|
|
stop_glerror();
|
|
}
|
|
|
|
glGenFramebuffersEXT(1, (GLuint *) &mFBO);
|
|
|
|
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
|
|
|
|
if (mDepth)
|
|
{
|
|
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
|
|
if (mStencil)
|
|
{
|
|
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
|
|
}
|
|
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
|
|
}
|
|
|
|
stop_glerror();
|
|
|
|
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
|
|
stop_glerror();
|
|
}
|
|
|
|
addColorAttachment(color_fmt);
|
|
}
|
|
|
|
void LLMultisampleBuffer::addColorAttachment(U32 color_fmt)
|
|
{
|
|
if (color_fmt == 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
U32 offset = mTex.size();
|
|
if (offset >= 4 ||
|
|
(offset > 0 && (mFBO == 0 || !gGLManager.mHasDrawBuffers)))
|
|
{
|
|
llerrs << "Too many color attachments!" << llendl;
|
|
}
|
|
|
|
U32 tex;
|
|
glGenRenderbuffersEXT(1, &tex);
|
|
|
|
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, tex);
|
|
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, mSamples, color_fmt, mResX, mResY);
|
|
stop_glerror();
|
|
|
|
if (mFBO)
|
|
{
|
|
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
|
|
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+offset, GL_RENDERBUFFER_EXT, tex);
|
|
stop_glerror();
|
|
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
|
|
switch (status)
|
|
{
|
|
case GL_FRAMEBUFFER_COMPLETE_EXT:
|
|
break;
|
|
case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
|
|
llerrs << "WTF?" << llendl;
|
|
break;
|
|
default:
|
|
llerrs << "WTF?" << llendl;
|
|
}
|
|
|
|
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
|
|
}
|
|
|
|
mTex.push_back(tex);
|
|
}
|
|
|
|
void LLMultisampleBuffer::allocateDepth()
|
|
{
|
|
glGenRenderbuffersEXT(1, (GLuint* ) &mDepth);
|
|
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mDepth);
|
|
if (mStencil)
|
|
{
|
|
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, mSamples, GL_DEPTH24_STENCIL8_EXT, mResX, mResY);
|
|
}
|
|
else
|
|
{
|
|
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, mSamples, GL_DEPTH_COMPONENT16_ARB, mResX, mResY);
|
|
}
|
|
}
|
|
|