As such, OpenGL has many language bindings, some of the most noteworthy being the JavaScript binding WebGL (API, based on OpenGL ES 2.0, for 3D rendering from within a web browser) the C bindings WGL, GLX and CGL the C binding provided by iOS and the Java and C bindings provided by Android. Although the function definitions are superficially similar to those of the programming language C, they are language-independent. The API is defined as a set of functions which may be called by the client program, alongside a set of named integer constants (for example, the constant GL_TEXTURE_2D, which corresponds to the decimal number 3553). Although it is possible for the API to be implemented entirely in software, it is designed to be implemented mostly or entirely in hardware. The OpenGL specification describes an abstract API for drawing 2D and 3D graphics. Īn illustration of the graphics pipeline process Since 2006, OpenGL has been managed by the non-profit technology consortium Khronos Group. (SGI) began developing OpenGL in 1991 and released it on Japplications use it extensively in the fields of computer-aided design (CAD), virtual reality, scientific visualization, information visualization, flight simulation, and video games.
The API is typically used to interact with a graphics processing unit (GPU), to achieve hardware-accelerated rendering. OpenGL ( Open Graphics Library ) is a cross-language, cross-platform application programming interface (API) for rendering 2D and 3D vector graphics.
: This is a Free Software License B closely modeled on BSD, X, and Mozilla licenses. Open source license for use of the S.I.Speaking of bugs, these are best filed on Bitbucket, not this forum. glVertexAttribDivisor is one of them, but that’s more of a coincidence in your case. Because 99% of the functions that are exposed in higher versions come from core extensions, they are loaded by the part that loads extension functions.īut you’re right, this is a bug there will be functions that are missed by this. They simply aren’t available.Īs far as I can tell this doesn’t handle anything past 3.2. If that was the reason you switched, the apparent lack of post-3.2 functions loaded by GLEW, then you’re not going to get them any more with GLLoad than with GLEW. And glVertexAttribDivisor is a GL 3.3 function that’s why you’re not getting the function loaded. OSX simply does not support anything higher than 3.2. You don’t have a 4.3 context you have 4.3-capable hardware but that’s not the same thing. At least, it doesn’t advertise itself as such. gleIntLoad_Version_4_3_Comp() makes everything work as intended. ProcExtFromExtString((const char *)glGetString(GL_EXTENSIONS), gleIntExtensionMap, gleIntExtensionMapSize) Īs far as I can tell this doesn’t handle anything past 3.2. Use different methods if glGetStringi is available. If(!gleIntLoad_Version_3_2()) eCurrLoadStatus = LS_LOAD_FUNCTIONS_SOME If(!gleIntLoad_Version_3_2_Comp()) eCurrLoadStatus = LS_LOAD_FUNCTIONS_SOME If(iProfileMask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT) GlGetIntegerv(GL_CONTEXT_PROFILE_MASK, &iProfileMask) If(!gleIntLoad_Version_3_1()) eCurrLoadStatus = LS_LOAD_FUNCTIONS_SOME If(!gleIntLoad_Version_3_1_Comp()) eCurrLoadStatus = LS_LOAD_FUNCTIONS_SOME If(!gleIntLoad_Version_3_0()) eCurrLoadStatus = LS_LOAD_FUNCTIONS_SOME If(!gleIntLoad_Version_2_1()) eCurrLoadStatus = LS_LOAD_FUNCTIONS_SOME Įlse if(iMajorVersion = 3 & iMinorVersion < 2) GetGLVersion(&iMajorVersion, &iMinorVersion) Get the base functions that we need just to process OpenGL. Clear the extensions, in case we loaded already. Int eCurrLoadStatus = LS_LOAD_FUNCTIONS_ALL LoadFunctions taken from the newest version of GLLoad: int LoadFunctions() As far as I can tell the method is suppose to load the various functions specified for each version successively. When trying to figure out why I took a look in how GLLoad was implemented inside the LoadFunctions.
GLLoad is now causing a problem when trying to use 3.3 core gl::VertexAttribDivisor which is undefined even on a 4.3 context. I recently converted from using GLEW to GLLoad from the Unofficial SDK - Due to the fact that GLEW doesn’t really support OSX.