Package org.lwjgl.opengles

Class EXTDisjointTimerQuery


  • public class EXTDisjointTimerQuery
extends java.lang.Object
    Native bindings to the EXT_disjoint_timer_query extension.

    Applications can benefit from accurate timing information in a number of different ways. During application development, timing information can help identify application or driver bottlenecks. At run time, applications can use timing information to dynamically adjust the amount of detail in a scene to achieve constant frame rates. OpenGL implementations have historically provided little to no useful timing information. Applications can get some idea of timing by reading timers on the CPU, but these timers are not synchronized with the graphics rendering pipeline. Reading a CPU timer does not guarantee the completion of a potentially large amount of graphics work accumulated before the timer is read, and will thus produce wildly inaccurate results. glFinish() can be used to determine when previous rendering commands have been completed, but will idle the graphics pipeline and adversely affect application performance.

    This extension provides a query mechanism that can be used to determine the amount of time it takes to fully complete a set of GL commands, and without stalling the rendering pipeline. It uses the query object mechanisms first introduced in the occlusion query extension, which allow time intervals to be polled asynchronously by the application.

    Requires GLES 2.0.

    • Field Detail

      • GL_QUERY_COUNTER_BITS_EXT

        public static final int GL_QUERY_COUNTER_BITS_EXT
        Accepted by the pname parameter of GetQueryivEXT.
        See Also:
        Constant Field Values

      • GL_CURRENT_QUERY_EXT

        public static final int GL_CURRENT_QUERY_EXT
        Accepted by the pname parameter of GetQueryivEXT.
        See Also:
        Constant Field Values

      • GL_QUERY_RESULT_EXT

        public static final int GL_QUERY_RESULT_EXT
        Accepted by the pname parameter of GetQueryObjectivEXT, GetQueryObjectuivEXT, GetQueryObjecti64vEXT, and GetQueryObjectui64vEXT.
        See Also:
        Constant Field Values

      • GL_QUERY_RESULT_AVAILABLE_EXT

        public static final int GL_QUERY_RESULT_AVAILABLE_EXT
        Accepted by the pname parameter of GetQueryObjectivEXT, GetQueryObjectuivEXT, GetQueryObjecti64vEXT, and GetQueryObjectui64vEXT.
        See Also:
        Constant Field Values

      • GL_TIME_ELAPSED_EXT

        public static final int GL_TIME_ELAPSED_EXT
        Accepted by the target parameter of BeginQueryEXT, EndQueryEXT, and GetQueryivEXT.
        See Also:
        Constant Field Values

      • GL_TIMESTAMP_EXT

        public static final int GL_TIMESTAMP_EXT
        Accepted by the target parameter of GetQueryiv and QueryCounter. Accepted by the value parameter of GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.
        See Also:
        Constant Field Values

      • GL_GPU_DISJOINT_EXT

        public static final int GL_GPU_DISJOINT_EXT
        Accepted by the value parameter of GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.
        See Also:
        Constant Field Values

    • Method Detail

      • glGenQueriesEXT

        public static void glGenQueriesEXT(java.nio.IntBuffer ids)

      • glGenQueriesEXT

        public static int glGenQueriesEXT()

      • glDeleteQueriesEXT

        public static void glDeleteQueriesEXT(java.nio.IntBuffer ids)

      • glDeleteQueriesEXT

        public static void glDeleteQueriesEXT(int id)

      • glIsQueryEXT

        public static boolean glIsQueryEXT(int id)

      • glBeginQueryEXT

        public static void glBeginQueryEXT(int target,
                                   int id)

      • glEndQueryEXT

        public static void glEndQueryEXT(int target)

      • glQueryCounterEXT

        public static void glQueryCounterEXT(int id,
                                     int target)

      • glGetQueryivEXT

        public static void glGetQueryivEXT(int target,
                                   int pname,
                                   java.nio.IntBuffer params)

      • glGetQueryiEXT

        public static int glGetQueryiEXT(int target,
                                 int pname)

      • glGetQueryObjectivEXT

        public static void glGetQueryObjectivEXT(int id,
                                         int pname,
                                         java.nio.IntBuffer params)

      • glGetQueryObjectiEXT

        public static int glGetQueryObjectiEXT(int id,
                                       int pname)

      • glGetQueryObjectuivEXT

        public static void glGetQueryObjectuivEXT(int id,
                                          int pname,
                                          java.nio.IntBuffer params)

      • glGetQueryObjectuiEXT

        public static int glGetQueryObjectuiEXT(int id,
                                        int pname)

      • glGetQueryObjecti64vEXT

        public static void glGetQueryObjecti64vEXT(int id,
                                           int pname,
                                           java.nio.LongBuffer params)

      • glGetQueryObjecti64EXT

        public static long glGetQueryObjecti64EXT(int id,
                                          int pname)

      • glGetQueryObjectui64vEXT

        public static void glGetQueryObjectui64vEXT(int id,
                                            int pname,
                                            java.nio.LongBuffer params)

      • glGetQueryObjectui64EXT

        public static long glGetQueryObjectui64EXT(int id,
                                           int pname)

      • glGenQueriesEXT

        public static void glGenQueriesEXT(int[] ids)
        Array version of: GenQueriesEXT

      • glDeleteQueriesEXT

        public static void glDeleteQueriesEXT(int[] ids)
        Array version of: DeleteQueriesEXT

      • glGetQueryivEXT

        public static void glGetQueryivEXT(int target,
                                   int pname,
                                   int[] params)
        Array version of: GetQueryivEXT

      • glGetQueryObjectivEXT

        public static void glGetQueryObjectivEXT(int id,
                                         int pname,
                                         int[] params)
        Array version of: GetQueryObjectivEXT

      • glGetQueryObjectuivEXT

        public static void glGetQueryObjectuivEXT(int id,
                                          int pname,
                                          int[] params)
        Array version of: GetQueryObjectuivEXT

      • glGetQueryObjecti64vEXT

        public static void glGetQueryObjecti64vEXT(int id,
                                           int pname,
                                           long[] params)
        Array version of: GetQueryObjecti64vEXT

      • glGetQueryObjectui64vEXT

        public static void glGetQueryObjectui64vEXT(int id,
                                            int pname,
                                            long[] params)
        Array version of: GetQueryObjectui64vEXT