llrendertarget.cpp
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- /**
- * @file llrendertarget.cpp
- * @brief LLRenderTarget implementation
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #include "linden_common.h"
- #include "llrendertarget.h"
- #include "llrender.h"
- #include "llgl.h"
- LLRenderTarget* LLRenderTarget::sBoundTarget = NULL;
- void check_framebuffer_status()
- {
- if (gDebugGL)
- {
- GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
- switch (status)
- {
- case GL_FRAMEBUFFER_COMPLETE_EXT:
- break;
- default:
- ll_fail("check_framebuffer_status failed");
- break;
- }
- }
- }
- BOOL LLRenderTarget::sUseFBO = FALSE;
- LLRenderTarget::LLRenderTarget() :
- mResX(0),
- mResY(0),
- mTex(0),
- mFBO(0),
- mDepth(0),
- mStencil(0),
- mUseDepth(FALSE),
- mRenderDepth(FALSE),
- mUsage(LLTexUnit::TT_TEXTURE),
- mSamples(0),
- mSampleBuffer(NULL)
- {
- }
- LLRenderTarget::~LLRenderTarget()
- {
- release();
- }
- void LLRenderTarget::setSampleBuffer(LLMultisampleBuffer* buffer)
- {
- mSampleBuffer = buffer;
- }
- void LLRenderTarget::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil, LLTexUnit::eTextureType usage, BOOL use_fbo)
- {
- stop_glerror();
- mResX = resx;
- mResY = resy;
- mStencil = stencil;
- mUsage = usage;
- mUseDepth = depth;
- release();
- if ((sUseFBO || use_fbo) && gGLManager.mHasFramebufferObject)
- {
- if (depth)
- {
- stop_glerror();
- allocateDepth();
- stop_glerror();
- }
- glGenFramebuffersEXT(1, (GLuint *) &mFBO);
- if (mDepth)
- {
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
- if (mStencil)
- {
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
- stop_glerror();
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
- stop_glerror();
- }
- else
- {
- glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
- stop_glerror();
- }
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- }
-
- stop_glerror();
- }
- addColorAttachment(color_fmt);
- }
- void LLRenderTarget::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;
- LLImageGL::generateTextures(1, &tex);
- gGL.getTexUnit(0)->bindManual(mUsage, tex);
- stop_glerror();
- LLImageGL::setManualImage(LLTexUnit::getInternalType(mUsage), 0, color_fmt, mResX, mResY, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
- stop_glerror();
- if (offset == 0)
- {
- gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_BILINEAR);
- }
- else
- { //don't filter data attachments
- gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_POINT);
- }
- if (mUsage != LLTexUnit::TT_RECT_TEXTURE)
- {
- gGL.getTexUnit(0)->setTextureAddressMode(LLTexUnit::TAM_MIRROR);
- }
- else
- {
- // ATI doesn't support mirrored repeat for rectangular textures.
- gGL.getTexUnit(0)->setTextureAddressMode(LLTexUnit::TAM_CLAMP);
- }
- if (mFBO)
- {
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
- glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+offset,
- LLTexUnit::getInternalType(mUsage), tex, 0);
- stop_glerror();
- check_framebuffer_status();
-
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- }
- mTex.push_back(tex);
- }
- void LLRenderTarget::allocateDepth()
- {
- if (mStencil)
- {
- //use render buffers where stencil buffers are in play
- glGenRenderbuffersEXT(1, (GLuint *) &mDepth);
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mDepth);
- glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT, mResX, mResY);
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
- }
- else
- {
- LLImageGL::generateTextures(1, &mDepth);
- gGL.getTexUnit(0)->bindManual(mUsage, mDepth);
- U32 internal_type = LLTexUnit::getInternalType(mUsage);
- gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_POINT);
- LLImageGL::setManualImage(internal_type, 0, GL_DEPTH_COMPONENT32_ARB, mResX, mResY, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL);
- }
- }
- void LLRenderTarget::shareDepthBuffer(LLRenderTarget& target)
- {
- if (!mFBO || !target.mFBO)
- {
- llerrs << "Cannot share depth buffer between non FBO render targets." << llendl;
- }
- if (mDepth)
- {
- stop_glerror();
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, target.mFBO);
- stop_glerror();
- if (mStencil)
- {
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
- stop_glerror();
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepth);
- stop_glerror();
- }
- else
- {
- glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
- stop_glerror();
- if (mStencil)
- {
- glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, LLTexUnit::getInternalType(mUsage), mDepth, 0);
- stop_glerror();
- }
- }
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- target.mUseDepth = TRUE;
- }
- }
- void LLRenderTarget::release()
- {
- if (mFBO)
- {
- glDeleteFramebuffersEXT(1, (GLuint *) &mFBO);
- mFBO = 0;
- }
- if (mTex.size() > 0)
- {
- LLImageGL::deleteTextures(mTex.size(), &mTex[0]);
- mTex.clear();
- }
- if (mDepth)
- {
- if (mStencil)
- {
- glDeleteRenderbuffersEXT(1, (GLuint*) &mDepth);
- stop_glerror();
- }
- else
- {
- LLImageGL::deleteTextures(1, &mDepth);
- stop_glerror();
- }
- mDepth = 0;
- }
- mSampleBuffer = NULL;
- sBoundTarget = NULL;
- }
- void LLRenderTarget::bindTarget()
- {
- if (mFBO)
- {
- stop_glerror();
- if (mSampleBuffer)
- {
- mSampleBuffer->bindTarget(this);
- stop_glerror();
- }
- else
- {
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
- stop_glerror();
- if (gGLManager.mHasDrawBuffers)
- { //setup multiple render targets
- GLenum drawbuffers[] = {GL_COLOR_ATTACHMENT0_EXT,
- GL_COLOR_ATTACHMENT1_EXT,
- GL_COLOR_ATTACHMENT2_EXT,
- GL_COLOR_ATTACHMENT3_EXT};
- glDrawBuffersARB(mTex.size(), drawbuffers);
- }
-
- if (mTex.empty())
- { //no color buffer to draw to
- glDrawBuffer(GL_NONE);
- glReadBuffer(GL_NONE);
- }
- check_framebuffer_status();
- stop_glerror();
- }
- }
- glViewport(0, 0, mResX, mResY);
- sBoundTarget = this;
- }
- // static
- void LLRenderTarget::unbindTarget()
- {
- if (gGLManager.mHasFramebufferObject)
- {
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- }
- sBoundTarget = NULL;
- }
- void LLRenderTarget::clear(U32 mask_in)
- {
- U32 mask = GL_COLOR_BUFFER_BIT;
- if (mUseDepth)
- {
- mask |= GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;
- }
- if (mFBO)
- {
- check_framebuffer_status();
- stop_glerror();
- glClear(mask & mask_in);
- stop_glerror();
- }
- else
- {
- LLGLEnable scissor(GL_SCISSOR_TEST);
- glScissor(0, 0, mResX, mResY);
- stop_glerror();
- glClear(mask & mask_in);
- }
- }
- U32 LLRenderTarget::getTexture(U32 attachment) const
- {
- if (attachment > mTex.size()-1)
- {
- llerrs << "Invalid attachment index." << llendl;
- }
- return mTex[attachment];
- }
- void LLRenderTarget::bindTexture(U32 index, S32 channel)
- {
- if (index > mTex.size()-1)
- {
- llerrs << "Invalid attachment index." << llendl;
- }
- gGL.getTexUnit(channel)->bindManual(mUsage, mTex[index]);
- }
- void LLRenderTarget::flush(BOOL fetch_depth)
- {
- gGL.flush();
- if (!mFBO)
- {
- gGL.getTexUnit(0)->bind(this);
- glCopyTexSubImage2D(LLTexUnit::getInternalType(mUsage), 0, 0, 0, 0, 0, mResX, mResY);
- if (fetch_depth)
- {
- if (!mDepth)
- {
- allocateDepth();
- }
- gGL.getTexUnit(0)->bind(this);
- glCopyTexImage2D(LLTexUnit::getInternalType(mUsage), 0, GL_DEPTH24_STENCIL8_EXT, 0, 0, mResX, mResY, 0);
- }
- gGL.getTexUnit(0)->disable();
- }
- else
- {
- #if !LL_DARWIN
- stop_glerror();
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- stop_glerror();
-
- if (mSampleBuffer)
- {
- LLGLEnable multisample(GL_MULTISAMPLE_ARB);
- stop_glerror();
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
- stop_glerror();
- check_framebuffer_status();
- glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, mSampleBuffer->mFBO);
- check_framebuffer_status();
-
- stop_glerror();
- glBlitFramebufferEXT(0, 0, mResX, mResY, 0, 0, mResX, mResY, GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
- stop_glerror();
- if (mTex.size() > 1)
- {
- for (U32 i = 1; i < mTex.size(); ++i)
- {
- glFramebufferTexture2DEXT(GL_DRAW_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
- LLTexUnit::getInternalType(mUsage), mTex[i], 0);
- stop_glerror();
- glFramebufferRenderbufferEXT(GL_READ_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, mSampleBuffer->mTex[i]);
- stop_glerror();
- glBlitFramebufferEXT(0, 0, mResX, mResY, 0, 0, mResX, mResY, GL_COLOR_BUFFER_BIT, GL_NEAREST);
- stop_glerror();
- }
- for (U32 i = 0; i < mTex.size(); ++i)
- {
- glFramebufferTexture2DEXT(GL_DRAW_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+i,
- LLTexUnit::getInternalType(mUsage), mTex[i], 0);
- stop_glerror();
- glFramebufferRenderbufferEXT(GL_READ_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+i, GL_RENDERBUFFER_EXT, mSampleBuffer->mTex[i]);
- stop_glerror();
- }
- }
- }
- #endif
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- }
- }
- void LLRenderTarget::copyContents(LLRenderTarget& source, S32 srcX0, S32 srcY0, S32 srcX1, S32 srcY1,
- S32 dstX0, S32 dstY0, S32 dstX1, S32 dstY1, U32 mask, U32 filter)
- {
- #if !LL_DARWIN
- gGL.flush();
- if (!source.mFBO || !mFBO)
- {
- llerrs << "Cannot copy framebuffer contents for non FBO render targets." << llendl;
- }
- if (mSampleBuffer)
- {
- mSampleBuffer->copyContents(source, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
- }
- else
- {
- if (mask == GL_DEPTH_BUFFER_BIT && source.mStencil != mStencil)
- {
- stop_glerror();
-
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, source.mFBO);
- gGL.getTexUnit(0)->bind(this, true);
- stop_glerror();
- glCopyTexSubImage2D(LLTexUnit::getInternalType(mUsage), 0, srcX0, srcY0, dstX0, dstY0, dstX1, dstY1);
- stop_glerror();
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- stop_glerror();
- }
- else
- {
- glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, source.mFBO);
- stop_glerror();
- glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, mFBO);
- stop_glerror();
- check_framebuffer_status();
- stop_glerror();
- glBlitFramebufferEXT(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
- stop_glerror();
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- stop_glerror();
- }
- }
- #endif
- }
- //static
- void LLRenderTarget::copyContentsToFramebuffer(LLRenderTarget& source, S32 srcX0, S32 srcY0, S32 srcX1, S32 srcY1,
- S32 dstX0, S32 dstY0, S32 dstX1, S32 dstY1, U32 mask, U32 filter)
- {
- #if !LL_DARWIN
- if (!source.mFBO)
- {
- llerrs << "Cannot copy framebuffer contents for non FBO render targets." << llendl;
- }
- {
- glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, source.mFBO);
- stop_glerror();
- glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
- stop_glerror();
- check_framebuffer_status();
- stop_glerror();
- glBlitFramebufferEXT(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
- stop_glerror();
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- stop_glerror();
- }
- #endif
- }
- BOOL LLRenderTarget::isComplete() const
- {
- return (!mTex.empty() || mDepth) ? TRUE : FALSE;
- }
- void LLRenderTarget::getViewport(S32* viewport)
- {
- viewport[0] = 0;
- viewport[1] = 0;
- viewport[2] = mResX;
- viewport[3] = mResY;
- }
- //==================================================
- // LLMultisampleBuffer implementation
- //==================================================
- LLMultisampleBuffer::LLMultisampleBuffer()
- {
- }
- LLMultisampleBuffer::~LLMultisampleBuffer()
- {
- releaseSampleBuffer();
- }
- void LLMultisampleBuffer::releaseSampleBuffer()
- {
- if (mFBO)
- {
- glDeleteFramebuffersEXT(1, (GLuint *) &mFBO);
- mFBO = 0;
- }
- if (mTex.size() > 0)
- {
- glDeleteRenderbuffersEXT(mTex.size(), (GLuint *) &mTex[0]);
- mTex.clear();
- }
- if (mDepth)
- {
- glDeleteRenderbuffersEXT(1, (GLuint *) &mDepth);
- mDepth = 0;
- }
- }
- void LLMultisampleBuffer::bindTarget()
- {
- bindTarget(this);
- }
- void LLMultisampleBuffer::bindTarget(LLRenderTarget* ref)
- {
- if (!ref)
- {
- ref = this;
- }
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
- if (gGLManager.mHasDrawBuffers)
- { //setup multiple render targets
- GLenum drawbuffers[] = {GL_COLOR_ATTACHMENT0_EXT,
- GL_COLOR_ATTACHMENT1_EXT,
- GL_COLOR_ATTACHMENT2_EXT,
- GL_COLOR_ATTACHMENT3_EXT};
- glDrawBuffersARB(ref->mTex.size(), drawbuffers);
- }
- check_framebuffer_status();
- glViewport(0, 0, mResX, mResY);
- sBoundTarget = this;
- }
- void LLMultisampleBuffer::allocate(U32 resx, U32 resy, U32 color_fmt, BOOL depth, BOOL stencil, LLTexUnit::eTextureType usage, BOOL use_fbo )
- {
- allocate(resx,resy,color_fmt,depth,stencil,usage,use_fbo,2);
- }
- 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 !LL_DARWIN
- 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);
- #endif
- }
- void LLMultisampleBuffer::allocateDepth()
- {
- #if !LL_DARWIN
- 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);
- }
- #endif
- }