glDrawTransformFeedback - render primitives using a count derived from a transform feedback object

voidglDrawTransformFeedback(GLenummode,GLuintid);

       Copyright © 2010-2014 Khronos Group.

[FIXME: source]                                    11/18/2024                           GLDRAWTRANSFORMFEEDB(3G)

glDrawTransformFeedback draws primitives of a type specified by mode using a count retrieved from the
       transform feedback specified by id. Calling glDrawTransformFeedback is equivalent to calling
       glDrawArrays() with mode as specified, first set to zero, and count set to the number of vertices
       captured on vertex stream zero the last time transform feedback was active on the transform feedback
       object named by id.

GL_INVALID_ENUM is generated if mode is not an accepted value.

       GL_INVALID_VALUE is generated if id is not the name of a transform feedback object.

       GL_INVALID_OPERATION is generated if a non-zero buffer object name is bound to an enabled array and the
       buffer object's data store is currently mapped.

       GL_INVALID_OPERATION is generated if a geometry shader is active and mode is incompatible with the input
       primitive type of the geometry shader in the currently installed program object.

       GL_INVALID_OPERATION is generated if mode is GL_PATCHES and no tessellation control shader is active.

       GL_INVALID_OPERATION is generated if

       glEndTransformFeedback has never been called while the transform feedback object named by id was bound.

       glDrawTransformFeedback - render primitives using a count derived from a transform feedback object

mode
           Specifies what kind of primitives to render. Symbolic constants GL_POINTS, GL_LINE_STRIP,
           GL_LINE_LOOP, GL_LINES, GL_LINE_STRIP_ADJACENCY, GL_LINES_ADJACENCY, GL_TRIANGLE_STRIP,
           GL_TRIANGLE_FAN, GL_TRIANGLES, GL_TRIANGLE_STRIP_ADJACENCY, GL_TRIANGLES_ADJACENCY, and GL_PATCHES
           are accepted.

       id
           Specifies the name of a transform feedback object from which to retrieve a primitive count.

glDrawArrays(), glDrawArraysInstanced(), glDrawElements(), glDrawRangeElements(),
       glDrawTransformFeedbackStream()

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       │ Function                │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
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       │ Feature                 │     │     │     │     │     │     │     │     │     │     │     │     │
       │ Name                    │     │     │     │     │     │     │     │     │     │     │     │     │
       ├─────────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │ glDrawTransformFeedback │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └─────────────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘