LUXOPHIA/bonemotion | Bitbucket.org

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1.WhatAPIshouldweusetoallowanapplicationtoindicateitwants *

10.WhatistheOES_framebuffer_objectinteraction *

11.ShouldweaddretroactivesupportforEXT_texture_type_2_10_10_10_REV *

12.DoweneeddifferenttokenvaluesfromOpenGL *

2.Shouldthisspecificationmakeanymentionof *

3.4.yinthisextensionmustbeacceptedbytheirrespectivecommands. *

3.Whatshouldbetherecommendedwaytoaddnewformatsinthefuture *

32 ,32

4.Howshouldwehandlerendervs.texturebuffers *

5.ShouldthisextensionrequireRGBA8 *

6.Whatshouldthisextensionsay ,ifanything,aboutdepthandstencil

7.Shouldwealloweverycombinationof <format>,<type>,and

8.Shouldwesplitthisextensionintomultipleextensions *

9.Shouldweaddaquerythatletstheimplementationadvertisewhich *

ALPHA *

ALPHA8_OES *

ALPHA8_OES0x803C *

ALPHAUNSIGNED_BYTE1ALPHA ,ALPHA8

AaftabMunshi *

Acceptedbythe <internalformat>argumentofRenderbufferStorageOES

Acceptedbythe <internalformat>argumentofTexImage2D,TexImage3DOES,and

AdditionstoAppendixAoftheOpenGLES1.1Specification *

AdditionstoChapter2oftheOpenGLES1.1Specification *

AdditionstoChapter3oftheOpenGLES1.1Specification *

AdditionstoChapter4oftheOpenGLES1.1Specification *

AdditionstoChapter5oftheOpenGLES1.1Specification *

AdditionstoChapter6oftheOpenGLES1.1Specification *

AdditionstotheAGL *

Allsizedformatsinthesetablesmustbestoredwithatleastthe *

Animplementationmustacceptallofthevaluesfor <internalformat>

Animplementationthatexportsthisextensioniscommittingtosupportall *

AnotheroptionwastocreateanewsetofglTexImage *

ApprovedbytheKhronosPromotersonApril26 ,2012.

AuthorRevision *

AvailabilityofRGB8renderbuffersisstillbasedonpresenceofthe *

BenjLipchak ,Apple,Inc.

Complete. *

Contact *

Contributors *

CopyTexImage2D *

CopyTexImage2Discalledwithavalueof <internalformat>notlistedin

Copyright *

DEPTH24_STENCIL8_OES *

DEPTH24_STENCIL8_OES0x88F0 *

DEPTH_COMPONENT16_OES *

DEPTH_COMPONENT16_OES0x81A5 *

DEPTH_COMPONENT24_OES *

DEPTH_COMPONENT24_OES0x81A6 *

DEPTH_COMPONENT24_OESshouldbedeleted. *

DEPTH_COMPONENT32_OES *

DEPTH_COMPONENT32_OES0x81A7 *

DEPTH_COMPONENT32_OESshouldbedeleted. *

DEPTH_COMPONENTUNSIGNED_INT4DEPTH_COMPONENT ,DEPTH_COMPONENT32_OES,DEPTH_COMPONENT24_OES,DEPTH_COMPONENT16_OES

DEPTH_COMPONENTUNSIGNED_SHORT2DEPTH_COMPONENT ,DEPTH_COMPONENT16_OES

DEPTH_COMPONENTasalegalvaluefor <format>whencallingTexImage2Dand

DEPTH_STENCIL_OES ,DEPTH24_STENCIL8_OES,andUNSIGNED_INT_24_8_OESshouldbe

DEPTH_STENCIL_OESUNSIGNED_INT_24_8_OES4DEPTH_STENCIL_OES ,DEPTH24_STENCIL8_OES

Dependencies *

DependenciesonEXT_texture_type_2_10_10_10_REV *

DependenciesonOES_depth24andOES_depth32 *

DependenciesonOES_depth_texture *

DependenciesonOES_framebuffer_object *

DependenciesonOES_packed_depth_stencil *

DependenciesonOES_rgb8_rgba8 *

DependenciesonOES_stencil1 ,OES_stencil4,andOES_stencil8

DependenciesonOES_texture_3D *

DependenciesonOpenGLES2.0 *

EXT_texture_type_2_10_10_10_REVaffectsthedefinitionofthisextension. *

Errors *

FOO_expanded_internalformat. *

Feature1 *

Feature2 *

Feature3 *

FormatTypeExternalBytesperPixelInternalformat *

Forreference ,

GLXProtocol *

GL_DEPTH_COMPONENT ,GL_UNSIGNED_INT,myD32TexelData

GL_OES_required_internalformat *

GL_RGBA ,GL_UNSIGNED_BYTE,myTexelData

GL_SUPPORTED_TEXTURE_INTERNALFORMATforqueryingsupportedtexture *

However ,itseemsthesimplestthingtodoistojustusethe

However ,thislatterapproachranintotheproblemthatglCopyTexImage2D

INVALID_ENUMisgenerated. *

INVALID_ENUMtoINVALID_OPERATION *

IfEXT_texture_type_2_10_10_10_REVisnotsupported ,thenallreferencesto

IfOES_depth24isnotsupported ,thenallreferencesto

IfOES_depth32isnotsupported ,thenallreferencesto

IfOES_depth_textureisnotsupported ,thenallreferencesto

IfOES_framebuffer_objectisnotsupportedandOpenGLES2.0isnot *

IfOES_packed_depth_stencilisnotsupported ,thenallreferencesto

IfOES_rgb8_rgba8isnotsupported ,thenreferencestoRGB8_OESasa

IfOES_stencil1isnotsupported ,thenallreferencestoSTENCIL_INDEX1_OES

IfOES_stencil4isnotsupported ,thenallreferencestoSTENCIL_INDEX4_OES

IfOES_stencil8isnotsupportedandOpenGLES2.0isnotsupported ,then

IfOES_texture_3Disnotsupported ,thenallreferencestoTexImage3DOES

IfOpenGLES2.0issupported ,thefollowingtokensdonothavethe

IfRenderbufferStorageOESorCopyTexImage2Discalledwithavalueof *

IfTexImage2DorTexImage3DOESiscalledwithacombinationof <format>,

Ifoneofthebase *

Inaddition ,onlycertainvaluesfor<internalformat>arevalidwhen

Inaddition ,ES1.1doesnotallowanimplementationtofailarequestto

Insection3.6.2 *

Insection3.7.9 *

Internalformat *

Issues *

JeremySandmel *

Justlikebefore ,newextensionscanaddnewvaluesfor<internalformat>

LUMINANCE *

LUMINANCE ,ALPHA,DEPTH_COMPONENT,orDEPTH_STENCIL_OES

LUMINANCE4_ALPHA4_OES *

LUMINANCE4_ALPHA4_OES0x8043 *

LUMINANCE8_ALPHA8_OES *

LUMINANCE8_ALPHA8_OES0x8045 *

LUMINANCE8_OES *

LUMINANCE8_OES0x8040 *

LUMINANCEUNSIGNED_BYTE1LUMINANCE ,LUMINANCE8

LUMINANCE_ALPHA *

LUMINANCE_ALPHAUNSIGNED_BYTE2LUMINANCE_ALPHA ,LUMINANCE8_ALPHA8,LUMINANCE4_ALPHA4

LastModifiedDate *

MembersoftheKhronosOpenGLESworkinggroup *

MyExtensionQuery *

Name *

NameStrings *

NewImplementationDependentState *

NewProceduresandFunctions *

NewState *

NewTokens *

NewTypes *

No ,we

No ,wespecificallydisallowconversionsbetween

No.Initiallysomenewtokens *

No.Novendorhasexpressedinterestinsubsettingthese3features *

None. *

Note ,thisextensiondoesnotrequireRGB8forrenderbuffers.

Notethatintheoppositesituationwhereanapplicationprovideshigher *

Notice *

Number *

OES_depth24andOES_depth32affectthedefinitionofthisextension. *

OES_depth_textureaffectsthedefinitionofthisextension. *

OES_framebuffer_objectaffectsthedefinitionofthisextension. *

OES_packed_depth_stencilaffectsthedefinitionofthisextension. *

OES_required_internalformat *

OES_rgb8_rgba8affectsthedefinitionofthisextension. *

OES_rgb8_rgba8extension. *

OES_stencil1 ,OES_stencil4,andOES_stencil8affectthedefinitionofthis

OES_texture_3Daffectsthedefinitionofthisextension. *

OES_texture_cube_map *

OpenGL *

OpenGLES1.0isrequired. *

OpenGLES2.0affectsthedefinitionofthisextension. *

OperationsandtheFrameBuffer *

Otherextensionsmayintroducenewvaluesfor <internalformat>.Ifthey

Overview *

RENDERBUFFER_INTERNALFORMAT.Oninput <count>isthemaximum

RENDERBUFFER_OESsection *

RESOLVED ,allthevaluesfor<internalformat>inTables3.4,3.4.x,and

RESOLVED *

RGB *

RGB10_A2_EXT *

RGB10_A2_EXT ,RGB10_EXT,andUNSIGNED_INT_2_10_10_10_REV_EXTshouldbe

RGB10_A2_EXT0x8059 *

RGB10_EXT *

RGB10_EXT.Thisformatcontinuestobeunrenderable ,consistentwith

RGB10_EXT0x8052 *

RGB565_OES *

RGB565_OES0x8D62 *

RGB5_A1_OES *

RGB5_A1_OES0x8057 *

RGB8_OES *

RGB8_OES0x8051 *

RGBA *

RGBA4_OES *

RGBA4_OES0x8056 *

RGBA8_OES *

RGBA8_OES0x8058 *

RGBAUNSIGNED_BYTE4RGBA ,RGBA8,RGB5_A1,RGBA4

RGBAUNSIGNED_INT_2_10_10_10_REV_EXT4RGBA ,RGB10_A2_EXT,RGB5_A1

RGBAUNSIGNED_SHORT_4_4_4_42RGBA ,RGBA4

RGBAUNSIGNED_SHORT_5_5_5_12RGBA ,RGB5_A1

RGBAandLUMINANCE_ALPHA ,forinstance

RGBUNSIGNED_BYTE3RGB ,RGB8,RGB565

RGBUNSIGNED_INT_2_10_10_10_REV_EXT4RGB ,RGB10_EXT,RGB8,RGB565

RGBUNSIGNED_SHORT_5_6_52RGB ,RGB565

RenderbufferStorageOES *

RenderbufferStorageOESiscalledwithavalueof <internalformat>not

Requests *

RevisionHistory *

STENCIL_INDEX1_OES *

STENCIL_INDEX4_OES *

STENCIL_INDEX8_OES *

SampleCode *

Sizedformathintsandminimumprecisionguaranteesfortexturesare *

Status *

StencilanddepthformatsarelistedintheTable3.4.x.Ifan *

Table3.4 ,eveniftheimplementationdoesnotnativelysupportdatastored

Table3.4 *

Table3.4.x *

Table3.4.y ,thenINVALID_ENUMisgenerated.

Table3.4.y *

Table3.4andreplacetheprecedingparagraphasfollows *

TexImage *

TexImage3DOESshouldbedeleted. *

TheES1.1APIallowsanimplementationtostoretexturedatainternally *

Theprimarymotivationformoving *

Thisextensionaddressesthesituationintwoways *

ThisextensioniswrittenagainsttheOpenGLES1.1specification. *

UNPACKparameter. *

Version *

Wehavethreetablesinthespec ,onefortexturesspecifiedwith

Weintentionallydon *

Weoriginallyhadconsideredusinganew *

Weusethe *

WhencallingTexImage2DorTexImage3DOES ,notallcombinationsof

Whilethisallowsflexibilityforimplementations ,itdoesmeanthatan

XXXTBD *

Yes ,forboth.OpenGLES2.0implementationsareverylikelytohave

Yes.Weintroducedtwonewsizedinternalformats ,RGB10_A2_EXTand

allocatedbyglRenderbufferStorageOES. *

allocation. *

allowstheusertorequestthattheGLusealowerprecisionthanthe *

allreferencestoSTENCIL_INDEX8_OESshouldbedeleted. *

andRENDERBUFFER.Also ,RenderbufferStoragedoesnothavethe

andglRenderbufferStorageOESdon *

andglRenderbufferStorageOESentrypointsthatimpliedaminimum *

andoneforCopyTexImagesinceyoucancreateadepth *

application *

applicationcanchoosean <internalformat>withadifferentbaseinternal

applicationdesiressomeminimumprecisionforinternalstorageand *

applicationdoesnothaveareliablemeanstorequesttheimplementation *

applicationtofindoutthatthishashappened. *

arenotchanged. *

asmuchprecisionaspossible ,giventhesourceargumentstothose

availablefunctionality.Well-behavedapplicationsshouldalwaysquery *

avoidingformatconversion. *

baseinternalformatof <internalformat>.

bedeleted ,includingTable3.4.x.

booldepth32_available =CheckExtension

booldepth_texture_available =CheckExtension

booleanIsPreciseInternalformatOES *

booleanQuerySupportOES *

boolreqSupportAvailable =CheckExtension

boolreqSupportAvailable =

callingRenderbufferStorageOESandCopyTexImage2D.Thevalidvaluesof *

checkingtheminimumprecisionstorageguarantee. *

chooseanarbitraryprecisionfortheinternalstorageofimagedata *

combinationsacceptedbytheGLaredefinedinTable3.4.IfTexImage2D *

commands. *

completeness *

componentfortexturesandrenderbuffers. *

componentwithatleastthenumberofbitsprescribed. *

contain <count>entries.

containsallthevaluesof <internalformat>forwhichthe

conversion.Ifsomeimplementationreallywantstoaddthis *

correspondingminimumprecision. *

definingtheparticularbaseformatandprecisionthattheapplicationwants *

deleted. *

do ,theyshouldmodifyTables3.4,3.4.x,and3.4.y.Ifan

don *

entriesthatwouldrequiretheGLtousemoreprecisionthanthe *

enum *

exit *

exporttheextension. *

exportthisextensionornot ,dependingonwhethertheysupport8bit

extension. *

external <type>wouldrequire,butthattabledoesnotincludeany

external <type>wouldrequire.

fail.Furthermore ,itisguaranteeingthatforanysizedinternalformat,

for *

for <internalformat>toTexImage2D,TexImage3DOES,orCopyTexImage2D,

foravailablefunctionalityonaparticularimplementation. *

forextensionstringsandotherimplementation-dependentstatetocheck *

format. *

formatoflowerprecisionthanrequested.The <param>couldbe

formats--thosewithexplicitcomponentresolutions--bystoringeach *

formatthanthesourceformatspecifiedby <format>.Theimplementationis

formatwiththecurrentlyboundcontext ,wouldresultinaninternal

fortextureorrenderbufferimageallocation. *

fromequivalentOpenGLtokens ,andaddedissue12

fromthelistbelowbeforewedroppedthequeryentirely *

functionality ,itwouldneedtocreateanadditionalextension,say

futureextensions ,newsizedinternalformatswillprovidethesamekind

generated. *

glPixelStoreithatindicatedtheexternal <format>and<type>arguments

glRenderbufferStorageOES *

glTexImage *

glTexImage2D *

glTexImage2Dforanyofthelegal <format>and<type>combinationslistedin

guaranteeminimumprecision ,likethis

if *

ifOES_rgb8_rgba8ispresent. *

implementationcansupportthenew <internalformat>values,itwill

implementationisguaranteeingthatchoosingan <internalformat>argument

implementationisstillfreetostoreatthehigherprecision ,thereby

implementationthatsupportsthisextensiondoesn *

implementationwillguaranteespecifiedprecision. <list>will

implementationwillmaintainforagiventextureorrenderbufferimage. *

instance.Further ,sinceESremovestheabilitytoquerythetextureobject

int *

internalformatsforRenderbufferStorageOES *

inthatexternal <format>and<type>.However,therearenoadditional

isgenerated. *

isthenumberofinternalformatsin <list>.Onoutput,<list>

listedinTable3.4.xthenINVALID_ENUMisgenerated.Similarly ,if

listofsized <internalformats>forwhichitwillguaranteeto

maintainaspecificprecisionortofindoutwhatprecisionthe *

maintainthespecifiedminimumprecisionwhenthoseformatsareused *

makeFBOsaprerequisite. *

mechanismin *

minimumprecisiontoday *

mustbesupportedwithno *

mustrespecttheminimumprecisionrequirementsofsizedinternal *

necessary.Todayallsizedinternalformatshaveguaranteedminimum *

nordotheyhaveexternal <format>or<type>argumentstoindicatethe

notrequiredtoexactlymatchtheprecisionspecifiedby <internalformat>

nowspecifiesanumberofformatsasbeing *

numberofinternalformatstoreturn ,andonoutput<count>

ofexistingsizedinternalformatsontherequiredlistofformatsfor *

ofminimumprecisionguaranteesastheformatsdescribedherein. *

ofthelegalvaluesfor <internalformat>inTables3.4,3.4.x,and3.4.y,

ofthestencil *

orTexImage3DOESiscalledwithacombinationof <format>,<type>,and

points.It *

precision.Forposterity ,wewereclosetochoosingquerymechanism

precisionofallavailablesizedinternalformats. *

precisionsandGL_SUPPORTED_RENDERBUFFER_INTERNALFORMATforquerying *

precisionsourcedataandasksittobestoredatlowerprecision ,an

prerequisite *

prescribedbythesizedinternalformat. *

printf *

renderbufferbutnottexture. *

renderbufferformatinTable3.4.xshouldbedeleted. *

renderbuffersallocatedwithRenderbufferStorageOES. *

renderbuffersifFBOsaren *

requested *

requiredprecision. *

requirementsplacedontheimplementation.TheESimplementationisfreeto *

respecttheminimumprecisionguarantee *

returnsGL_FALSEifanyofthem ,whenusedasasizedinternal

samesenseofalowerboundonprecision ,andthetokenvalues

separatedefinedextensions *

shouldbedeleted. *

sincethatwouldrequireexpandingthealphachannel *

sizedinternalformatsitsupportswithminimumprecision *

specifiedinTables3.4 ,3.4.x,3.4.y.Furthermore,animplementation

storageofatleastacertainprecisionforaparticularsourceformat *

storethetexturedatawithlowerprecisionthanoriginallyspecified ,for

subjecttotheextensiondependenciesdescribedherein.Thatistosay ,the

suppliedbytheapplication.Similarly ,ESallowsanimplementationto

supported *

supported ,thenallreferencestoRENDERBUFFER_OESandrenderbuffersshould

supportedrenderbufferprecisions. *

texture.ESimplementationsarestillencouraged ,however,tomaintain

thantheyprovideexternallybecauseitwouldnecessitateaformat *

thattheGLshouldnotuselessthanthespecifiedprecision. *

theEXT_texture_type_2_10_10_10_REVspec.Theseformatsjointherest *

theGLisfreetochoosetheprecisionthatitwillmaintainforthe *

thedesired *

theideathatitissupposedtocheckforerrorsinordertoqueryfor *

theimplementationtomaintainwhenstoringtheimagedata.Further ,the

theirownextensionsissothatawell-behavedapplicationnevergets *

therenderbufferortexturedatawillbestoredwithatleasttheprecision *

thissupportanyway ,andOpenGLES1.ximplementationscanchooseto

thoseenumsareNOTlistedinTable3.4.x. *

tofindoutwhatinternalformatitchose ,thereisnowayforthe

typecombination *

usefulevenonimplementationswhereFBOsaren *

values ,whichwasduetoadifferenceinthemeaningrelativeto

voidGetSupportedInternalFormatsOES *

whenchoosinganinternalstorageprecision ,butitisrequiredtomatchthe

where <param>mustbeTEXTURE_INTERNALFORMATor

where <param>mustbeTEXTUREorRENDERBUFFER_OES,and

whereasinthisextensiontheyarelowerbounds.However ,OpenGL

whichprecisionisguaranteed. *

whichtakesa <list>of<count>sizedinternalformatenumsand

witharbitraryprecision ,regardlessoftheformatandtypeofthedata

withavaluefromthesetableswillnotcauseanimageallocationrequestto *

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