Package org.lwjgl.opengl

Class EXTSemaphore

java.lang.Object

org.lwjgl.opengl.EXTSemaphore

public class EXTSemaphore
extends java.lang.Object

Native bindings to the EXT_semaphore extension.

The Vulkan API introduces the concept of explicit memory objects and reusable synchronization objects. This extension brings those concepts to the OpenGL API via two new object types:

• Memory objects
• Semaphores

Rather than allocating memory as a response to object allocation, memory allocation and binding are two separate operations in Vulkan. This extension allows an OpenGL application to import a Vulkan memory object, and to bind textures and/or buffer objects to it.

No methods to import memory objects are defined here. Separate platform-specific extensions are defined for this purpose.

Semaphores are synchronization primitives that can be waited on and signaled only by the GPU, or in GL terms, in the GL server. They are similar in concept to GL's "sync" objects and EGL's "EGLSync" objects, but different enough that compatibilities between the two are difficult to derive.

Rather than attempt to map Vulkan semaphores on to GL/EGL sync objects to achieve interoperability, this extension introduces a new object, GL semaphores, that map directly to the semantics of Vulkan semaphores. To achieve full image and buffer memory coherence with a Vulkan driver, the commands that manipulate semaphores also allow external usage information to be imported and exported.

Field Summary

Fields

Modifier and Type	Field and Description
static int	GL_DEVICE_UUID_EXT GL_DRIVER_UUID_EXT Accepted by the pname parameter of GetBooleanv, GetDoublev, GetFloatv, GetIntegerv, GetInteger64v, GetUnsignedBytevEXT, and the target parameter of GetBooleani_v, GetIntegeri_v,GetFloati_v, GetDoublei_v, GetInteger64i_v, and GetUnsignedBytei_vEXT.
static int	GL_LAYOUT_COLOR_ATTACHMENT_EXT GL_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_EXT GL_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_EXT GL_LAYOUT_DEPTH_STENCIL_ATTACHMENT_EXT GL_LAYOUT_DEPTH_STENCIL_READ_ONLY_EXT GL_LAYOUT_GENERAL_EXT GL_LAYOUT_SHADER_READ_ONLY_EXT GL_LAYOUT_TRANSFER_DST_EXT GL_LAYOUT_TRANSFER_SRC_EXT Accepted by the dstLayouts parameter of SignalSemaphoreEXT and the srcLayouts parameter of WaitSemaphoreEXT.
static int	GL_NUM_DEVICE_UUIDS_EXT Accepted by the pname parameter of GetBooleanv, GetDoublev, GetFloatv, GetIntegerv, GetInteger64v, GetUnsignedBytevEXT, and the target parameter of GetBooleani_v, GetIntegeri_v,GetFloati_v, GetDoublei_v, GetInteger64i_v, and GetUnsignedBytei_vEXT.
static int	GL_UUID_SIZE_EXT Constant values.

Method Summary

Modifier and Type	Method and Description
static void	glDeleteSemaphoresEXT(int semaphore)
static void	glDeleteSemaphoresEXT(int[] semaphores) Array version of: DeleteSemaphoresEXT
static void	glDeleteSemaphoresEXT(java.nio.IntBuffer semaphores)
static int	glGenSemaphoresEXT()
static void	glGenSemaphoresEXT(int[] semaphores) Array version of: GenSemaphoresEXT
static void	glGenSemaphoresEXT(java.nio.IntBuffer semaphores)
static long	glGetSemaphoreParameterui64EXT(int semaphore, int pname)
static void	glGetSemaphoreParameterui64vEXT(int semaphore, int pname, long[] params) Array version of: GetSemaphoreParameterui64vEXT
static void	glGetSemaphoreParameterui64vEXT(int semaphore, int pname, java.nio.LongBuffer params)
static void	glGetUnsignedBytei_vEXT(int target, int index, java.nio.ByteBuffer data)
static void	glGetUnsignedBytevEXT(int pname, java.nio.ByteBuffer data)
static boolean	glIsSemaphoreEXT(int semaphore)
static void	glSemaphoreParameterui64EXT(int semaphore, int pname, long param)
static void	glSemaphoreParameterui64vEXT(int semaphore, int pname, long[] params) Array version of: SemaphoreParameterui64vEXT
static void	glSemaphoreParameterui64vEXT(int semaphore, int pname, java.nio.LongBuffer params)
static void	glSignalSemaphoreEXT(int semaphore, int[] buffers, int[] textures, int[] dstLayouts) Array version of: SignalSemaphoreEXT
static void	glSignalSemaphoreEXT(int semaphore, java.nio.IntBuffer buffers, java.nio.IntBuffer textures, java.nio.IntBuffer dstLayouts)
static void	glWaitSemaphoreEXT(int semaphore, int[] buffers, int[] textures, int[] srcLayouts) Array version of: WaitSemaphoreEXT
static void	glWaitSemaphoreEXT(int semaphore, java.nio.IntBuffer buffers, java.nio.IntBuffer textures, java.nio.IntBuffer srcLayouts)

Methods inherited from class java.lang.Object

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

Field Detail

GL_NUM_DEVICE_UUIDS_EXT, GL_DEVICE_UUID_EXT, GL_DRIVER_UUID_EXT

Accepted by the pname parameter of GetBooleanv, GetDoublev, GetFloatv, GetIntegerv, GetInteger64v, GetUnsignedBytevEXT, and the target parameter of GetBooleani_v, GetIntegeri_v,GetFloati_v, GetDoublei_v, GetInteger64i_v, and GetUnsignedBytei_vEXT.

GL_UUID_SIZE_EXT

Constant values.

GL_LAYOUT_GENERAL_EXT, GL_LAYOUT_COLOR_ATTACHMENT_EXT, GL_LAYOUT_DEPTH_STENCIL_ATTACHMENT_EXT, GL_LAYOUT_DEPTH_STENCIL_READ_ONLY_EXT, GL_LAYOUT_SHADER_READ_ONLY_EXT, GL_LAYOUT_TRANSFER_SRC_EXT, GL_LAYOUT_TRANSFER_DST_EXT, GL_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_EXT, GL_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_EXT

Accepted by the dstLayouts parameter of SignalSemaphoreEXT and the srcLayouts parameter of WaitSemaphoreEXT.

Method Detail

glGetUnsignedBytevEXT

public static void glGetUnsignedBytevEXT(int pname,
                                         java.nio.ByteBuffer data)

glGetUnsignedBytei_vEXT

public static void glGetUnsignedBytei_vEXT(int target,
                                           int index,
                                           java.nio.ByteBuffer data)

glGenSemaphoresEXT

public static void glGenSemaphoresEXT(java.nio.IntBuffer semaphores)

glGenSemaphoresEXT

public static int glGenSemaphoresEXT()

glDeleteSemaphoresEXT

public static void glDeleteSemaphoresEXT(java.nio.IntBuffer semaphores)

glDeleteSemaphoresEXT

public static void glDeleteSemaphoresEXT(int semaphore)

glIsSemaphoreEXT

public static boolean glIsSemaphoreEXT(int semaphore)

glSemaphoreParameterui64vEXT

public static void glSemaphoreParameterui64vEXT(int semaphore,
                                                int pname,
                                                java.nio.LongBuffer params)

glSemaphoreParameterui64EXT

public static void glSemaphoreParameterui64EXT(int semaphore,
                                               int pname,
                                               long param)

glGetSemaphoreParameterui64vEXT

public static void glGetSemaphoreParameterui64vEXT(int semaphore,
                                                   int pname,
                                                   java.nio.LongBuffer params)

glGetSemaphoreParameterui64EXT

public static long glGetSemaphoreParameterui64EXT(int semaphore,
                                                  int pname)

glWaitSemaphoreEXT

public static void glWaitSemaphoreEXT(int semaphore,
                                      java.nio.IntBuffer buffers,
                                      java.nio.IntBuffer textures,
                                      java.nio.IntBuffer srcLayouts)

glSignalSemaphoreEXT

public static void glSignalSemaphoreEXT(int semaphore,
                                        java.nio.IntBuffer buffers,
                                        java.nio.IntBuffer textures,
                                        java.nio.IntBuffer dstLayouts)

glGenSemaphoresEXT

public static void glGenSemaphoresEXT(int[] semaphores)

Array version of: GenSemaphoresEXT

glDeleteSemaphoresEXT

public static void glDeleteSemaphoresEXT(int[] semaphores)

Array version of: DeleteSemaphoresEXT

glSemaphoreParameterui64vEXT

public static void glSemaphoreParameterui64vEXT(int semaphore,
                                                int pname,
                                                long[] params)

Array version of: SemaphoreParameterui64vEXT

glGetSemaphoreParameterui64vEXT

public static void glGetSemaphoreParameterui64vEXT(int semaphore,
                                                   int pname,
                                                   long[] params)

Array version of: GetSemaphoreParameterui64vEXT

glWaitSemaphoreEXT

public static void glWaitSemaphoreEXT(int semaphore,
                                      int[] buffers,
                                      int[] textures,
                                      int[] srcLayouts)

Array version of: WaitSemaphoreEXT

glSignalSemaphoreEXT

public static void glSignalSemaphoreEXT(int semaphore,
                                        int[] buffers,
                                        int[] textures,
                                        int[] dstLayouts)

Array version of: SignalSemaphoreEXT