What's the possible usage of glFramebufferRenderbuffer ...

OpenGL glFramebufferRenderbuffer() get error - Stack Overflow 2022DeveloperSurveyisopen!Takesurvey. Home Public Questions Tags Users Companies Collectives ExploreCollectives Teams StackOverflowforTeams –Startcollaboratingandsharingorganizationalknowledge. CreateafreeTeam WhyTeams? Teams CreatefreeTeam Collectives™onStackOverflow Findcentralized,trustedcontentandcollaboratearoundthetechnologiesyouusemost. Learnmore Teams Q&Aforwork Connectandshareknowledgewithinasinglelocationthatisstructuredandeasytosearch. Learnmore What'sthepossibleusageofglFramebufferRenderbufferunderGLES2? AskQuestion Asked 5years,1monthago Modified 5years,1monthago Viewed 1ktimes 2 I'mtryingtogetmyopenglframeworktorunonaraspberrypi3,usingGLES2. Onthecoreprofile,Idothis: glGenRenderbuffers(1,&ColorBufferGLID); glBindRenderbuffer(GL_RENDERBUFFER,ColorBufferGLID); glRenderbufferStorage(GL_RENDERBUFFER,GL_RGBA,Dimensions.x,Dimensions.y); glFramebufferRenderbuffer(GL_FRAMEBUFFER,GL_COLOR_ATTACHMENT0,GL_RENDERBUFFER,ColorBufferGLID); glGenRenderbuffers(1,&DepthBufferGLID); glBindRenderbuffer(GL_RENDERBUFFER,DepthBufferGLID); glRenderbufferStorage(GL_RENDERBUFFER,GL_DEPTH_COMPONENT32F,Dimensions.x,Dimensions.y); glFramebufferRenderbuffer(GL_FRAMEBUFFER,GL_DEPTH_ATTACHMENT,GL_RENDERBUFFER,DepthBufferGLID); glBindFramebuffer(GL_READ_FRAMEBUFFER,OpenGLID); glBindFramebuffer(GL_DRAW_FRAMEBUFFER,0); glBlitFramebuffer(In_LowerLeft.x,In_LowerLeft.y,In_UpperRight.x,In_UpperRight.y, In_LowerLeft.x,In_LowerLeft.y,In_UpperRight.x,In_UpperRight.y, GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT, GL_NEAREST); AndunderGLES2,Idothesame,butwithdifferentenums,butlateron,thereisnoglBlitFramebuffer,soIcannotdisplayit. IknowIcandothesamewithatextureinsteadofarenderbuffer,usingglFramebufferTexture2D,butthenI'dhavetodrawascreen-sizedquadjusttoshowit. IfIcannotblitorreadfromtherenderbuffer,what'sthepointofit?Howcanitbeused?HowelsecanIadaptthispieceofcodetoGLES2? opengl-esopengl-es-2.0 Share Follow editedMar31,2017at15:23 genpfault 49.3k1010goldbadges7979silverbadges128128bronzebadges askedMar31,2017at15:19 JoaoPinchoJoaoPincho 86911goldbadge1111silverbadges2525bronzebadges Addacomment  |  1Answer 1 Sortedby: Resettodefault Highestscore(default) Datemodified(newestfirst) Datecreated(oldestfirst) 0 AsnotedbythedocumentationforRenderbufferObjectsontheOpenGLWiki, theonlywaytousearenderbufferobjectistoattachittoa FramebufferObject.AfteryoubindthatFBOtothecontext,andsetup thedraworreadbuffersappropriately,youcanusepixeltransfer operationstoreadandwritetoit. So,youcanusepixeltransferoperationstoread/writeto/fromit(eg.glReadPixels/glDrawPixels).It'salsousefulifyoudon'tneeddirectaccesstothebuffer,butrequireitforrendering.Forexample,adepthbuffer,usedtorenderanoffscreentarget,butwhichisneverdirectlysampleditself. Toyourquestionofhowtoportthecode-glBlitFramebufferisavailableinOpenGLES3.0.IfyoumusttargetOpenGL2.0,yoursuggestionofdrawingascreen-sizedquadisareasonablesolution.Althoughpossible,IwouldnotsuggestusingglReadPixelsandglDrawPixels,asthisrequiresalldatabedownloadedintosystemmemory,whichwillbeveryslow. Share Follow answeredApr7,2017at13:21 MuertoExcobitoMuertoExcobito 9,26822goldbadges3333silverbadges7171bronzebadges Addacomment  |  YourAnswer ThanksforcontributingananswertoStackOverflow!Pleasebesuretoanswerthequestion.Providedetailsandshareyourresearch!Butavoid…Askingforhelp,clarification,orrespondingtootheranswers.Makingstatementsbasedonopinion;backthemupwithreferencesorpersonalexperience.Tolearnmore,seeourtipsonwritinggreatanswers. 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