Package org.lwjgl.opencl

Class KHRGLSharing

java.lang.Object

org.lwjgl.opencl.KHRGLSharing

public class KHRGLSharing
extends java.lang.Object

Native bindings to the khr_gl_sharing extension.

Field Summary

Fields

Modifier and Type	Field	Description
static int	CL_CGL_SHAREGROUP_KHR	Accepted as an attribute name in the properties argument of CreateContext and CreateContextFromType.
static int	CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR CL_DEVICES_FOR_GL_CONTEXT_KHR	Accepted as the param_name argument of GetGLContextInfoKHR.
static int	CL_EGL_DISPLAY_KHR CL_GL_CONTEXT_KHR CL_GLX_DISPLAY_KHR	Accepted as an attribute name in the properties argument of CreateContext and CreateContextFromType.
static int	CL_INVALID_GL_SHAREGROUP_REFERENCE_KHR	Returned by CreateContext, CreateContextFromType, and GetGLContextInfoKHR when an invalid OpenGL context or share group object handle is specified in properties.
static int	CL_WGL_HDC_KHR	Accepted as an attribute name in the properties argument of CreateContext and CreateContextFromType.

Method Summary

Modifier and Type	Method	Description
static int	clGetGLContextInfoKHR(PointerBuffer properties, int param_name, java.nio.ByteBuffer param_value, PointerBuffer param_value_size_ret)	Queries the OpenCL device currently corresponding to an OpenGL context.
static int	clGetGLContextInfoKHR(PointerBuffer properties, int param_name, PointerBuffer param_value, PointerBuffer param_value_size_ret)	Queries the OpenCL device currently corresponding to an OpenGL context.
static int	nclGetGLContextInfoKHR(long properties, int param_name, long param_value_size, long param_value, long param_value_size_ret)	Unsafe version of: GetGLContextInfoKHR

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CL_INVALID_GL_SHAREGROUP_REFERENCE_KHR

Returned by CreateContext, CreateContextFromType, and GetGLContextInfoKHR when an invalid OpenGL context or share group object handle is specified in properties.

CL_DEVICES_FOR_GL_CONTEXT_KHR

Accepted as the param_name argument of GetGLContextInfoKHR. Returns a list of all CL devices which may be associated with the specified OpenGL context.

CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR

Accepted as the param_name argument of GetGLContextInfoKHR. Returns the CL device currently associated with the specified OpenGL context.

CL_GL_CONTEXT_KHR, CL_EGL_DISPLAY_KHR, CL_GLX_DISPLAY_KHR, CL_WGL_HDC_KHR, CL_CGL_SHAREGROUP_KHR

Accepted as an attribute name in the properties argument of CreateContext and CreateContextFromType.

Method Detail

nclGetGLContextInfoKHR

public static int nclGetGLContextInfoKHR(long properties,
                                         int param_name,
                                         long param_value_size,
                                         long param_value,
                                         long param_value_size_ret)

Unsafe version of: GetGLContextInfoKHR

Parameters:

param_value_size - the size in bytes of memory pointed to by param_value. This size must be ≥ size of return type. If param_value is NULL, it is ignored.

clGetGLContextInfoKHR

public static int clGetGLContextInfoKHR(PointerBuffer properties,
                                        int param_name,
                                        @Nullable
                                        java.nio.ByteBuffer param_value,
                                        @Nullable
                                        PointerBuffer param_value_size_ret)

public static int clGetGLContextInfoKHR(PointerBuffer properties,
                                        int param_name,
                                        @Nullable
                                        PointerBuffer param_value,
                                        @Nullable
                                        PointerBuffer param_value_size_ret)

Queries the OpenCL device currently corresponding to an OpenGL context.

Such a device may not always exist (for example, if an OpenGL context is specified on a GPU not supporting OpenCL command queues, but which does support shared CL/GL objects), and if it does exist, may change over time. When such a device does exist, acquiring and releasing shared CL/GL objects may be faster on a command queue corresponding to this device than on command queues corresponding to other devices available to an OpenCL context.

Parameters:

properties - points to an attribute list whose format and valid contents are identical to the {code properties} argument of CreateContext. properties must identify a single valid GL context or GL share group object.

param_name - a constant that specifies the GL context information to query. One of:

DEVICES_FOR_GL_CONTEXT_KHR

CURRENT_DEVICE_FOR_GL_CONTEXT_KHR

param_value - a pointer to memory where the appropriate result being queried is returned. If param_value is NULL, it is ignored.

param_value_size_ret - the actual size in bytes of data being queried by param_value. If NULL, it is ignored.

Returns:

SUCCESS if the function is executed successfully. If no device(s) exist corresponding to param_name, the call will not fail, but the value of param_value_size_ret will be zero.

Returns INVALID_GL_SHAREGROUP_REFERENCE_KHR if a context was specified by any of the following means:

• A context was specified for an EGL-based OpenGL ES or OpenGL implementation by setting the attributes GL_CONTEXT_KHR and EGL_DISPLAY_KHR.
• A context was specified for a GLX-based OpenGL implementation by setting the attributes GL_CONTEXT_KHR and GLX_DISPLAY_KHR.
• A context was specified for a WGL-based OpenGL implementation by setting the attributes GL_CONTEXT_KHR and WGL_HDC_KHR.

and any of the following conditions hold:

• The specified display and context attributes do not identify a valid OpenGL or OpenGL ES context.
• The specified context does not support buffer and renderbuffer objects.
• The specified context is not compatible with the OpenCL context being created (for example, it exists in a physically distinct address space, such as another hardware device; or it does not support sharing data with OpenCL due to implementation restrictions).

Returns INVALID_GL_SHAREGROUP_REFERENCE_KHR if a share group was specified for a CGL-based OpenGL implementation by setting the attribute CGL_SHAREGROUP_KHR, and the specified share group does not identify a valid CGL share group object.

Returns INVALID_OPERATION if a context was specified as described above and any of the following conditions hold:

• A context or share group object was specified for one of CGL, EGL, GLX, or WGL and the OpenGL implementation does not support that window-system binding API.
• More than one of the attributes CGL_SHAREGROUP_KHR, EGL_DISPLAY_KHR, GLX_DISPLAY_KHR, and WGL_HDC_KHR is set to a non-default value.
• Both of the attributes CGL_SHAREGROUP_KHR and GL_CONTEXT_KHR are set to non-default values.
• Any of the devices specified in the devices argument cannot support OpenCL objects which share the data store of an OpenGL object.

Returns INVALID_VALUE if an invalid attribute name is specified in properties.

Additionally, returns INVALID_VALUE if param_name is invalid, or if the size in bytes specified by param_value_size is less than the size of the return type and param_value is not a NULL value, OUT_OF_RESOURCES if there is a failure to allocate resources required by the OpenCL implementation on the device, or OUT_OF_HOST_MEMORY if there is a failure to allocate resources required by the OpenCL implementation on the host.