All Known Subinterfaces:

GL, GL2, GL2ES1, GL2ES2, GL2ES3, GL2GL3, GL3, GL3bc, GL3ES3, GL4, GL4bc, GL4ES3, GLES1, GLES2, GLES3

All Known Implementing Classes:

DebugGL2, DebugGL3, DebugGL3bc, DebugGL4, DebugGL4bc, DebugGLES1, DebugGLES2, DebugGLES3, TraceGL2, TraceGL3, TraceGL3bc, TraceGL4, TraceGL4bc, TraceGLES1, TraceGLES2, TraceGLES3
```
public interface GLBase
```
The base interface from which all GL profiles derive, providing checked conversion down to concrete profiles, access to the OpenGL context associated with the GL and extension/function availability queries as described below.

While the APIs for vendor extensions are unconditionally exposed, the underlying functions may not be present. The method isFunctionAvailable(java.lang.String) should be used to query the availability of any non-core function before it is used for the first time; for example, gl.isFunctionAvailable("glProgramStringARB"). On certain platforms (Windows in particular), the most "core" functionality is only OpenGL 1.1, so in theory any routines first exposed in OpenGL 1.2, 1.3, and 1.4, 1.5, or 2.0 as well as vendor extensions should all be queried. Calling an unavailable function will cause a GLException to be raised.
isExtensionAvailable(java.lang.String) may also be used to determine whether a specific extension is available before calling the routines or using the functionality it exposes: for example, gl.isExtensionAvailable("GL_ARB_vertex_program");. However, in this case it is up to the end user to know which routines or functionality are associated with which OpenGL extensions. It may also be used to test for the availability of a particular version of OpenGL: for example, gl.isExtensionAvailable("GL_VERSION_1_5");.
Exceptions to the window system extension naming rules:
- WGL_ARB_pbuffer, WGL_ARB_pixel_format, and other platform-specific pbuffer functionality; the availability of pbuffers can be queried on Windows, X11 and Mac OS X platforms by querying isExtensionAvailable(java.lang.String) with an argument of "GL_ARB_pbuffer" or "GL_ARB_pixel_format".

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`getBoundBuffer(int target)`
`int`	`getBoundFramebuffer(int target)`	Return the framebuffer name bound to this context, see `GL.glBindFramebuffer(int, int)`.
`GLBufferStorage`	`getBufferStorage(int bufferName)`
`GLContext`	`getContext()`	Returns the GLContext associated which this GL object.
`int`	`getDefaultDrawBuffer()`	Returns the default color buffer within the current bound `getDefaultReadFramebuffer()`, i.e.
`int`	`getDefaultDrawFramebuffer()`	Return the default draw framebuffer name.
`int`	`getDefaultReadBuffer()`	Returns the default color buffer within the current bound `getDefaultReadFramebuffer()`, i.e.
`int`	`getDefaultReadFramebuffer()`	Return the default read framebuffer name.
`GL`	`getDownstreamGL()`	Returns the downstream GL instance in case this is a wrapping pipeline, otherwise `null`.
`Object`	`getExtension(String extensionName)`	Returns an object providing access to the specified OpenGL extension.
`GL`	`getGL()`	Casts this object to the GL interface.
`GL2`	`getGL2()`	Casts this object to the GL2 interface.
`GL2ES1`	`getGL2ES1()`	Casts this object to the GL2ES1 interface.
`GL2ES2`	`getGL2ES2()`	Casts this object to the GL2ES2 interface.
`GL2ES3`	`getGL2ES3()`	Casts this object to the GL2ES3 interface.
`GL2GL3`	`getGL2GL3()`	Casts this object to the GL2GL3 interface.
`GL3`	`getGL3()`	Casts this object to the GL3 interface.
`GL3bc`	`getGL3bc()`	Casts this object to the GL3bc interface.
`GL3ES3`	`getGL3ES3()`	Casts this object to the GL3ES3 interface.
`GL4`	`getGL4()`	Casts this object to the GL4 interface.
`GL4bc`	`getGL4bc()`	Casts this object to the GL4bc interface.
`GL4ES3`	`getGL4ES3()`	Casts this object to the GL4ES3 interface.
`GLES1`	`getGLES1()`	Casts this object to the GLES1 interface.
`GLES2`	`getGLES2()`	Casts this object to the GLES2 interface.
`GLES3`	`getGLES3()`	Casts this object to the GLES3 interface.
`GLProfile`	`getGLProfile()`	Returns the GLProfile associated with this GL object.
`int`	`getMaxRenderbufferSamples()`	Returns the maximum number of FBO RENDERBUFFER samples if `full FBO is supported`, otherwise false.
`Object`	`getPlatformGLExtensions()`	Returns an object through which platform-specific OpenGL extensions (EGL, GLX, WGL, etc.) may be accessed.
`GL`	`getRootGL()`	Returns the implementing root instance, considering a wrapped pipelined hierarchy, see `getDownstreamGL()`.
`int`	`getSwapInterval()`	Return the current swap interval.
`void`	`glClearDepth(double depth)`	Aliased entrypoint of `void glClearDepth(GLclampd depth);` and `void glClearDepthf(GLclampf depth);` .
`void`	`glDepthRange(double zNear, double zFar)`	Aliased entrypoint of `void glDepthRange(GLclampd depth);` and `void glDepthRangef(GLclampf depth);` .
`boolean`	`hasBasicFBOSupport()`	Returns `true` if basic FBO support is available, otherwise `false`.
`boolean`	`hasFullFBOSupport()`	Returns `true` if full FBO support is available, otherwise `false`.
`boolean`	`hasGLSL()`	Indicates whether this GL object supports GLSL.
`boolean`	`isExtensionAvailable(String glExtensionName)`	Returns true if the specified OpenGL extension can be used successfully through this GL instance given the current host (OpenGL client) and display (OpenGL server) configuration.
`boolean`	`isFunctionAvailable(String glFunctionName)`	Returns true if the specified OpenGL core- or extension-function can be used successfully through this GL instance given the current host (OpenGL client) and display (OpenGL server) configuration.
`boolean`	`isGL()`	Indicates whether this GL object conforms to any of the OpenGL profiles.
`boolean`	`isGL2()`	Indicates whether this GL object conforms to the OpenGL ≤ 3.0 profile.
`boolean`	`isGL2ES1()`	Indicates whether this GL object conforms to a GL2ES1 compatible profile.
`boolean`	`isGL2ES2()`	Indicates whether this GL object conforms to a GL2ES2 compatible profile.
`boolean`	`isGL2ES3()`	Indicates whether this GL object conforms to a either a GL2GL3 or GL3ES3 compatible profile.
`boolean`	`isGL2GL3()`	Indicates whether this GL object conforms to a GL2GL3 compatible profile.
`boolean`	`isGL3()`	Indicates whether this GL object conforms to the OpenGL ≥ 3.1 core profile.
`boolean`	`isGL3bc()`	Indicates whether this GL object conforms to the OpenGL ≥ 3.1 compatibility profile.
`boolean`	`isGL3core()`	Indicates whether this GL object uses a GL3 core profile.
`boolean`	`isGL3ES3()`	Indicates whether this GL object conforms to a GL3ES3 compatible profile.
`boolean`	`isGL4()`	Indicates whether this GL object conforms to the OpenGL ≥ 4.0 core profile.
`boolean`	`isGL4bc()`	Indicates whether this GL object conforms to the OpenGL ≥ 4.0 compatibility profile.
`boolean`	`isGL4core()`	Indicates whether this GL object uses a GL4 core profile.
`boolean`	`isGL4ES3()`	Returns true if this GL object conforms to a GL4ES3 compatible profile, i.e.
`boolean`	`isGLcore()`	Indicates whether this GL object uses a GL core profile.
`boolean`	`isGLES()`	Indicates whether this GL object conforms to one of the OpenGL ES profiles, see `isGLES1()`, `isGLES2()` and `isGLES3()`.
`boolean`	`isGLES1()`	Indicates whether this GL object conforms to the OpenGL ES ≥ 1.0 profile.
`boolean`	`isGLES2()`	Indicates whether this GL object conforms to the OpenGL ES ≥ 2.0 profile.
`boolean`	`isGLES2Compatible()`	Indicates whether this GL object is compatible with the core OpenGL ES2 functionality.
`boolean`	`isGLES3()`	Indicates whether this GL object conforms to the OpenGL ES ≥ 3.0 profile.
`boolean`	`isGLES31Compatible()`	Indicates whether this GL object is compatible with the core OpenGL ES3.1 functionality.
`boolean`	`isGLES32Compatible()`	Indicates whether this GL object is compatible with the core OpenGL ES3.2 functionality.
`boolean`	`isGLES3Compatible()`	Indicates whether this GL object is compatible with the core OpenGL ES3 functionality.
`boolean`	`isNPOTTextureAvailable()`	Returns true if the GL context supports non power of two (NPOT) textures, otherwise false.
`boolean`	`isTextureFormatBGRA8888Available()`
`boolean`	`isVBOArrayBound()`
`boolean`	`isVBOElementArrayBound()`
`GLBufferStorage`	`mapBuffer(int target, int access)`	Returns the `GLBufferStorage` instance as mapped via OpenGL's native `glMapBuffer(..)` implementation.
`GLBufferStorage`	`mapBufferRange(int target, long offset, long length, int access)`	Returns the `GLBufferStorage` instance as mapped via OpenGL's native `glMapBufferRange(..)` implementation.
`void`	`setSwapInterval(int interval)`	Set the swap interval of the current context and attached onscreen `GLDrawable`.

- Method Detail
  - isGL
```
boolean isGL()
```
    Indicates whether this GL object conforms to any of the OpenGL profiles.
  - isGL4bc
```
boolean isGL4bc()
```
    Indicates whether this GL object conforms to the OpenGL ≥ 4.0 compatibility profile. The GL4 compatibility profile includes the GL2, GL2ES1, GL2ES2, GL3, GL3bc and GL4 profile.
    
    See Also:
    
    GLContext.isGL4bc()
  - isGL4
```
boolean isGL4()
```
    Indicates whether this GL object conforms to the OpenGL ≥ 4.0 core profile. The GL4 core profile includes the GL2ES2, and GL3 profile.
    
    See Also:
    
    GLContext.isGL4()
  - isGL3bc
```
boolean isGL3bc()
```
    Indicates whether this GL object conforms to the OpenGL ≥ 3.1 compatibility profile. The GL3 compatibility profile includes the GL2, GL2ES1, GL2ES2 and GL3 profile.
    
    See Also:
    
    GLContext.isGL3bc()
  - isGL3
```
boolean isGL3()
```
    Indicates whether this GL object conforms to the OpenGL ≥ 3.1 core profile. The GL3 core profile includes the GL2ES2 profile.
    
    See Also:
    
    GLContext.isGL3()
  - isGL2
```
boolean isGL2()
```
    Indicates whether this GL object conforms to the OpenGL ≤ 3.0 profile. The GL2 profile includes the GL2ES1 and GL2ES2 profile.
    
    See Also:
    
    GLContext.isGL2()
  - isGLES1
```
boolean isGLES1()
```
    Indicates whether this GL object conforms to the OpenGL ES ≥ 1.0 profile.
    
    See Also:
    
    GLContext.isGLES1()
  - isGLES2
```
boolean isGLES2()
```
    Indicates whether this GL object conforms to the OpenGL ES ≥ 2.0 profile.
    Remark: ES2 compatible desktop profiles are not included. To query whether core ES2 functionality is provided, use isGLES2Compatible().
    
    See Also:
    
    isGLES2Compatible(), GLContext.isGLES2()
  - isGLES3
```
boolean isGLES3()
```
    Indicates whether this GL object conforms to the OpenGL ES ≥ 3.0 profile.
    Remark: ES3 compatible desktop profiles are not included. To query whether core ES3 functionality is provided, use isGLES3Compatible().
    
    See Also:
    
    isGLES3Compatible(), GLContext.isGLES3()
  - isGLES
```
boolean isGLES()
```
    Indicates whether this GL object conforms to one of the OpenGL ES profiles, see isGLES1(), isGLES2() and isGLES3().
    
    See Also:
    
    GLContext.isGLES()
  - isGL2ES1
```
boolean isGL2ES1()
```
    Indicates whether this GL object conforms to a GL2ES1 compatible profile.
    
    See Also:
    
    GLContext.isGL2ES1()
  - isGL2ES2
```
boolean isGL2ES2()
```
    Indicates whether this GL object conforms to a GL2ES2 compatible profile.
    
    See Also:
    
    GLContext.isGL2ES2()
  - isGL2ES3
```
boolean isGL2ES3()
```
    Indicates whether this GL object conforms to a either a GL2GL3 or GL3ES3 compatible profile.
    
    See Also:
    
    GLContext.isGL2ES3()
  - isGL3ES3
```
boolean isGL3ES3()
```
    Indicates whether this GL object conforms to a GL3ES3 compatible profile.
    
    See Also:
    
    GLContext.isGL3ES3()
  - isGL4ES3
```
boolean isGL4ES3()
```
    Returns true if this GL object conforms to a GL4ES3 compatible profile, i.e. if isGLES3Compatible() returns true.
    Includes [ GL ≥ 4.3, GL ≥ 3.1 w/ GL_ARB_ES3_compatibility and GLES3 ]
    
    See Also:
    
    GLContext.isGL4ES3()
  - isGL2GL3
```
boolean isGL2GL3()
```
    Indicates whether this GL object conforms to a GL2GL3 compatible profile.
    
    See Also:
    
    GLContext.isGL2GL3()
  - isGL4core
```
boolean isGL4core()
```
    Indicates whether this GL object uses a GL4 core profile.
    Includes [ GL4 ].
    
    See Also:
    
    GLContext.isGL4core()
  - isGL3core
```
boolean isGL3core()
```
    Indicates whether this GL object uses a GL3 core profile.
    Includes [ GL4, GL3 ].
    
    See Also:
    
    GLContext.isGL3core()
  - isGLcore
```
boolean isGLcore()
```
    Indicates whether this GL object uses a GL core profile.
    Includes [ GL4, GL3, GLES3, GL2ES2 ].
    
    See Also:
    
    GLContext.isGLcore()
  - isGLES2Compatible
```
boolean isGLES2Compatible()
```
    Indicates whether this GL object is compatible with the core OpenGL ES2 functionality.
    
    Returns:
    
    true if this context is an ES2 context or implements the extension GL_ARB_ES2_compatibility, otherwise false
    
    See Also:
    
    GLContext.isGLES2Compatible()
  - isGLES3Compatible
```
boolean isGLES3Compatible()
```
    Indicates whether this GL object is compatible with the core OpenGL ES3 functionality.
    Return true if the underlying context is an ES3 context or implements the extension GL_ARB_ES3_compatibility, otherwise false.
    
    Includes [ GL ≥ 4.3, GL ≥ 3.1 w/ GL_ARB_ES3_compatibility and GLES3 ]
    
    See Also:
    
    GLContext.isGLES3Compatible()
  - isGLES31Compatible
```
boolean isGLES31Compatible()
```
    Indicates whether this GL object is compatible with the core OpenGL ES3.1 functionality.
    Return true if the underlying context is an ES3 context ≥ 3.1 or implements the extension GL_ARB_ES3_1_compatibility, otherwise false.
    
    Includes [ GL ≥ 4.5, GL ≥ 3.1 w/ GL_ARB_ES3_1_compatibility and GLES3 ≥ 3.1 ]
    
    See Also:
    
    GLContext.isGLES31Compatible()
  - isGLES32Compatible
```
boolean isGLES32Compatible()
```
    Indicates whether this GL object is compatible with the core OpenGL ES3.2 functionality.
    Return true if the underlying context is an ES3 context ≥ 3.2 or implements the extension GL_ARB_ES3_2_compatibility, otherwise false.
    
    Includes [ GL ≥ 4.5, GL ≥ 3.1 w/ GL_ARB_ES3_2_compatibility and GLES3 ≥ 3.2 ]
    
    See Also:
    
    GLContext.isGLES32Compatible()
  - hasGLSL
```
boolean hasGLSL()
```
    Indicates whether this GL object supports GLSL.
    
    See Also:
    
    GLContext.hasGLSL()
  - getDownstreamGL
```
GL getDownstreamGL()
            throws GLException
```
    Returns the downstream GL instance in case this is a wrapping pipeline, otherwise null.
    See getRootGL() for retrieving the implementing root instance.
    
    Throws:
    
    GLException - if the downstream instance is not null and not a GL implementation
    
    See Also:
    
    getRootGL()
  - getRootGL
```
GL getRootGL()
      throws GLException
```
    Returns the implementing root instance, considering a wrapped pipelined hierarchy, see getDownstreamGL().
    If this instance is not a wrapping pipeline, i.e. has no downstream instance, this instance is returned.
    
    Throws:
    
    GLException - if the root instance is not a GL implementation
  - getGL
```
GL getGL()
  throws GLException
```
    Casts this object to the GL interface.
    
    Throws:
    
    GLException - if this object is not a GL implementation
  - getGL4bc
```
GL4bc getGL4bc()
        throws GLException
```
    Casts this object to the GL4bc interface.
    
    Throws:
    
    GLException - if this object is not a GL4bc implementation
  - getGL4
```
GL4 getGL4()
    throws GLException
```
    Casts this object to the GL4 interface.
    
    Throws:
    
    GLException - if this object is not a GL4 implementation
  - getGL3bc
```
GL3bc getGL3bc()
        throws GLException
```
    Casts this object to the GL3bc interface.
    
    Throws:
    
    GLException - if this object is not a GL3bc implementation
  - getGL3
```
GL3 getGL3()
    throws GLException
```
    Casts this object to the GL3 interface.
    
    Throws:
    
    GLException - if this object is not a GL3 implementation
  - getGL2
```
GL2 getGL2()
    throws GLException
```
    Casts this object to the GL2 interface.
    
    Throws:
    
    GLException - if this object is not a GL2 implementation
  - getGLES1
```
GLES1 getGLES1()
        throws GLException
```
    Casts this object to the GLES1 interface.
    
    Throws:
    
    GLException - if this object is not a GLES1 implementation
  - getGLES2
```
GLES2 getGLES2()
        throws GLException
```
    Casts this object to the GLES2 interface.
    
    Throws:
    
    GLException - if this object is not a GLES2 implementation
  - getGLES3
```
GLES3 getGLES3()
        throws GLException
```
    Casts this object to the GLES3 interface.
    
    Throws:
    
    GLException - if this object is not a GLES3 implementation
  - getGL2ES1
```
GL2ES1 getGL2ES1()
          throws GLException
```
    Casts this object to the GL2ES1 interface.
    
    Throws:
    
    GLException - if this object is not a GL2ES1 implementation
  - getGL2ES2
```
GL2ES2 getGL2ES2()
          throws GLException
```
    Casts this object to the GL2ES2 interface.
    
    Throws:
    
    GLException - if this object is not a GL2ES2 implementation
  - getGL2ES3
```
GL2ES3 getGL2ES3()
          throws GLException
```
    Casts this object to the GL2ES3 interface.
    
    Throws:
    
    GLException - if this object is not a GL2ES3 implementation
  - getGL3ES3
```
GL3ES3 getGL3ES3()
          throws GLException
```
    Casts this object to the GL3ES3 interface.
    
    Throws:
    
    GLException - if this object is not a GL3ES3 implementation
  - getGL4ES3
```
GL4ES3 getGL4ES3()
          throws GLException
```
    Casts this object to the GL4ES3 interface.
    
    Throws:
    
    GLException - if this object is not a GL4ES3 implementation
  - getGL2GL3
```
GL2GL3 getGL2GL3()
          throws GLException
```
    Casts this object to the GL2GL3 interface.
    
    Throws:
    
    GLException - if this object is not a GL2GL3 implementation
  - getGLProfile
```
GLProfile getGLProfile()
```
    Returns the GLProfile associated with this GL object.
  - getContext
```
GLContext getContext()
```
    Returns the GLContext associated which this GL object.
  - isFunctionAvailable
```
boolean isFunctionAvailable(String glFunctionName)
```
    Returns true if the specified OpenGL core- or extension-function can be used successfully through this GL instance given the current host (OpenGL client) and display (OpenGL server) configuration.
    By "successfully" we mean that the function is both callable on the machine running the program and available on the current display.
    In order to call a function successfully, the function must be both callable on the machine running the program and available on the display device that is rendering the output (note: on non-networked, single-display machines these two conditions are identical; on networked and/or multi-display machines this becomes more complicated). These conditions are met if the function is either part of the core OpenGL version supported by both the host and display, or it is an OpenGL extension function that both the host and display support.
    A GL function is callable if it is successfully linked at runtime, hence the GLContext must be made current at least once.
    
    Parameters:
    
    glFunctionName - the name of the OpenGL function (e.g., use "glBindRenderbufferEXT" or "glBindRenderbuffer" to check if GL.glBindRenderbuffer(int,int) is available).
  - isExtensionAvailable
```
boolean isExtensionAvailable(String glExtensionName)
```
    Returns true if the specified OpenGL extension can be used successfully through this GL instance given the current host (OpenGL client) and display (OpenGL server) configuration.
    
    Parameters:
    
    glExtensionName - the name of the OpenGL extension (e.g., "GL_ARB_vertex_program").
  - hasBasicFBOSupport
```
boolean hasBasicFBOSupport()
```
    Returns true if basic FBO support is available, otherwise false.
    Basic FBO is supported if the context is either GL-ES >= 2.0, GL >= 3.0 [core, compat] or implements the extensions GL_ARB_ES2_compatibility, GL_ARB_framebuffer_object, GL_EXT_framebuffer_object or GL_OES_framebuffer_object.
    
    Basic FBO support may only include one color attachment and no multisampling, as well as limited internal formats for renderbuffer.
    
    See Also:
    
    GLContext.hasBasicFBOSupport()
  - hasFullFBOSupport
```
boolean hasFullFBOSupport()
```
    Returns true if full FBO support is available, otherwise false.
    Full FBO is supported if the context is either GL >= core 3.0 [ES, core, compat] or implements the extensions ARB_framebuffer_object, or all of EXT_framebuffer_object, EXT_framebuffer_multisample, EXT_framebuffer_blit, GL_EXT_packed_depth_stencil.
    
    Full FBO support includes multiple color attachments and multisampling.
    
    See Also:
    
    GLContext.hasFullFBOSupport()
  - getMaxRenderbufferSamples
```
int getMaxRenderbufferSamples()
```
    Returns the maximum number of FBO RENDERBUFFER samples if full FBO is supported, otherwise false.
    
    See Also:
    
    GLContext.getMaxRenderbufferSamples()
  - isNPOTTextureAvailable
```
boolean isNPOTTextureAvailable()
```
    Returns true if the GL context supports non power of two (NPOT) textures, otherwise false.
    NPOT textures are supported in OpenGL >= 3, GLES2 or if the 'GL_ARB_texture_non_power_of_two' extension is available.
  - isTextureFormatBGRA8888Available
```
boolean isTextureFormatBGRA8888Available()
```
  - setSwapInterval
```
void setSwapInterval(int interval)
              throws GLException
```
    Set the swap interval of the current context and attached onscreen GLDrawable.
    offscreen GLDrawable are ignored and false is returned.
    
    The interval semantics:
    
    0 disables the vertical synchronization
    
    ≥1 is the number of vertical refreshes before a swap buffer occurs
    
    <0 enables late swaps to occur without synchronization to the video frame, a.k.a EXT_swap_control_tear. If supported, the absolute value is the minimum number of video frames between buffer swaps. If not supported, the absolute value is being used, see above.
    Parameters:
    
    interval - see above
    
    Throws:
    
    GLException - if the context is not current.
    
    See Also:
    
    GLContext.setSwapInterval(int), getSwapInterval()
  - getSwapInterval
```
int getSwapInterval()
```
    Return the current swap interval.
    If the context has not been made current at all, the default value 0 is returned.
    
    For a valid context w/ an onscreen GLDrawable the default value is 1, otherwise the default value is 0.
    
    See Also:
    
    GLContext.getSwapInterval(), setSwapInterval(int)
  - getPlatformGLExtensions
```
Object getPlatformGLExtensions()
```
    Returns an object through which platform-specific OpenGL extensions (EGL, GLX, WGL, etc.) may be accessed. The data type of the returned object and its associated capabilities are undefined. Most applications will never need to call this method. It is highly recommended that any applications which do call this method perform all accesses on the returned object reflectively to guard themselves against changes to the implementation.
  - getExtension
```
Object getExtension(String extensionName)
```
    Returns an object providing access to the specified OpenGL extension. This is intended to provide a mechanism for vendors who wish to provide access to new OpenGL extensions without changing the public API of the core package. For example, a user may request access to extension "GL_VENDOR_foo" and receive back an object which implements a vendor-specified interface which can call the OpenGL extension functions corresponding to that extension. It is up to the vendor to specify both the extension name and Java API for accessing it, including which class or interface contains the functions.
    Note: it is the intent to add new extensions as quickly as possible to the core GL API. Therefore it is unlikely that most vendors will use this extension mechanism, but it is being provided for completeness.
  - glClearDepth
```
void glClearDepth(double depth)
```
    Aliased entrypoint of void glClearDepth(GLclampd depth); and void glClearDepthf(GLclampf depth); .
  - glDepthRange
```
void glDepthRange(double zNear,
                  double zFar)
```
    Aliased entrypoint of void glDepthRange(GLclampd depth); and void glDepthRangef(GLclampf depth); .
  - getBoundBuffer
```
int getBoundBuffer(int target)
```
    Parameters:
    
    target - a GL buffer (VBO) target as used in GL.glBindBuffer(int, int), ie GL.GL_ELEMENT_ARRAY_BUFFER, GL.GL_ARRAY_BUFFER, ..
    
    Returns:
    
    the GL buffer name bound to a target via GL.glBindBuffer(int, int) or 0 if unbound.
    
    See Also:
    
    getBufferStorage(int)
  - getBufferStorage
```
GLBufferStorage getBufferStorage(int bufferName)
```
    Parameters:
    
    bufferName - a GL buffer name, generated with e.g. GL.glGenBuffers(int, int[], int) and used in GL.glBindBuffer(int, int), GL.glBufferData(int, long, java.nio.Buffer, int) or GL2.glNamedBufferDataEXT(int, long, java.nio.Buffer, int).
    
    Returns:
    
    the size of the given GL buffer storage, see GLBufferStorage
    
    See Also:
    
    getBoundBuffer(int)
  - mapBuffer
```
GLBufferStorage mapBuffer(int target,
                          int access)
                   throws GLException
```
    Returns the GLBufferStorage instance as mapped via OpenGL's native glMapBuffer(..) implementation.
    Throws a GLException if GL-function constraints are not met.
    
    GL.glMapBuffer(int, int) wrapper calls this method and returns GLBufferStorage.getMappedBuffer().
    
    A zero GLBufferStorage.getSize() will avoid a native call and returns the unmapped GLBufferStorage.
    
    A null native mapping result indicating an error will not cause a GLException but returns the unmapped GLBufferStorage. This allows the user to handle this case.
    
    Parameters:
    
    target - denotes the buffer via it's bound target
    
    access - the mapping access mode
    
    Throws:
    
    GLException - if buffer is not bound to target
    
    GLException - if buffer is not tracked
    
    GLException - if buffer is already mapped
    
    GLException - if buffer has invalid store size, i.e. less-than zero
  - mapBufferRange
```
GLBufferStorage mapBufferRange(int target,
                               long offset,
                               long length,
                               int access)
                        throws GLException
```
    Returns the GLBufferStorage instance as mapped via OpenGL's native glMapBufferRange(..) implementation.
    Throws a GLException if GL-function constraints are not met.
    
    GL.glMapBufferRange(int, long, long, int) wrapper calls this method and returns GLBufferStorage.getMappedBuffer().
    
    A zero GLBufferStorage.getSize() will avoid a native call and returns the unmapped GLBufferStorage.
    
    A null native mapping result indicating an error will not cause a GLException but returns the unmapped GLBufferStorage. This allows the user to handle this case.
    
    Parameters:
    
    target - denotes the buffer via it's bound target
    
    offset - offset of the mapped buffer's storage
    
    length - length of the mapped buffer's storage
    
    access - the mapping access mode
    
    Throws:
    
    GLException - if buffer is not bound to target
    
    GLException - if buffer is not tracked
    
    GLException - if buffer is already mapped
    
    GLException - if buffer has invalid store size, i.e. less-than zero
    
    GLException - if buffer mapping range does not fit, incl. offset
  - isVBOArrayBound
```
boolean isVBOArrayBound()
```
    Returns:
    
    true if a VBO is bound to GL.GL_ARRAY_BUFFER via GL.glBindBuffer(int, int), otherwise false
  - isVBOElementArrayBound
```
boolean isVBOElementArrayBound()
```
    Returns:
    
    true if a VBO is bound to GL.GL_ELEMENT_ARRAY_BUFFER via GL.glBindBuffer(int, int), otherwise false
  - getBoundFramebuffer
```
int getBoundFramebuffer(int target)
```
    Return the framebuffer name bound to this context, see GL.glBindFramebuffer(int, int).
    Calls GLContext.getBoundFramebuffer(int).
  - getDefaultDrawFramebuffer
```
int getDefaultDrawFramebuffer()
```
    Return the default draw framebuffer name.
    May differ from it's default zero in case an framebuffer object (FBObject) based drawable is being used.
    
    Calls GLContext.getDefaultDrawFramebuffer().
  - getDefaultReadFramebuffer
```
int getDefaultReadFramebuffer()
```
    Return the default read framebuffer name.
    May differ from it's default zero in case an framebuffer object (FBObject) based drawable is being used.
    
    Calls GLContext.getDefaultReadFramebuffer().
  - getDefaultDrawBuffer
```
int getDefaultDrawBuffer()
```
    Returns the default color buffer within the current bound getDefaultReadFramebuffer(), i.e. GL_READ_FRAMEBUFFER, which will be used as the target (output) for (fragment shader) draw commands, settable via GL2ES2.glDrawBuffers(int, int[], int) or GL2GL3.glDrawBuffer(int).
    For offscreen framebuffer objects this is GL.GL_COLOR_ATTACHMENT0, otherwise this is GL.GL_FRONT for non-ES profile and single buffer configurations and GL.GL_BACK for double buffer configurations or ES profiles.
    
    Note-1: Neither ES1 nor ES2 supports selecting the draw buffer at all and GL.GL_BACK is the default.
    
    Note-2: ES3 only supports GL.GL_BACK, GL.GL_NONE or GL.GL_COLOR_ATTACHMENT0+i via GL2ES2.glDrawBuffers(int, int[], int).
    
    Method is only thread-safe while context is made current.
  - getDefaultReadBuffer
```
int getDefaultReadBuffer()
```
    Returns the default color buffer within the current bound getDefaultReadFramebuffer(), i.e. GL_READ_FRAMEBUFFER, which will be used as the source for pixel reading commands, like glReadPixels etc.
    For offscreen framebuffer objects this is GL.GL_COLOR_ATTACHMENT0, otherwise this is GL.GL_FRONT for non-ES profile and single buffer configurations and GL.GL_BACK for double buffer configurations or ES profiles.
    
    Note-1: Neither ES1 nor ES2 supports selecting the read buffer via glReadBuffer and GL.GL_BACK is the default.
    
    Note-2: ES3 only supports GL.GL_BACK, GL.GL_NONE or GL.GL_COLOR_ATTACHMENT0+i
    
    Note-3: See swapBuffersBeforeRead for read-pixels and swap-buffers implications.
    
    Method is only thread-safe while context is made current.

Interface GLBase

Method Summary

Method Detail

isGL

isGL4bc

isGL4

isGL3bc

isGL3

isGL2

isGLES1

isGLES2

isGLES3

isGLES

isGL2ES1

isGL2ES2

isGL2ES3

isGL3ES3

isGL4ES3

isGL2GL3

isGL4core

isGL3core

isGLcore

isGLES2Compatible

isGLES3Compatible

isGLES31Compatible

isGLES32Compatible

hasGLSL

getDownstreamGL

getRootGL

getGL

getGL4bc

getGL4

getGL3bc

getGL3

getGL2

getGLES1

getGLES2

getGLES3

getGL2ES1

getGL2ES2

getGL2ES3

getGL3ES3

getGL4ES3

getGL2GL3

getGLProfile

getContext

isFunctionAvailable

isExtensionAvailable

hasBasicFBOSupport

hasFullFBOSupport

getMaxRenderbufferSamples

isNPOTTextureAvailable

isTextureFormatBGRA8888Available

setSwapInterval

getSwapInterval

getPlatformGLExtensions

getExtension

glClearDepth

glDepthRange

getBoundBuffer

getBufferStorage

mapBuffer

mapBufferRange

isVBOArrayBound

isVBOElementArrayBound

getBoundFramebuffer

getDefaultDrawFramebuffer

getDefaultReadFramebuffer

getDefaultDrawBuffer

getDefaultReadBuffer