glDrawTransformFeedback man page on RedHat
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GLDRAWTRANSFORMFEEDB(3G) OpenGL Manual GLDRAWTRANSFORMFEEDB(3G)
NAME
glDrawTransformFeedback - render primitives using a count derived from
a transform feedback object
C SPECIFICATION
void glDrawTransformFeedback(GLenum mode, GLuint id);
PARAMETERS
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.
DESCRIPTION
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.
ERRORS
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.
SEE ALSO
glDrawArrays(), glDrawArraysInstanced(), glDrawElements(),
glDrawRangeElements(), glDrawTransformFeedbackStream()
COPYRIGHT
Copyright © 2010 Khronos Group. This material may be distributed
subject to the terms and conditions set forth in the Open Publication
License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.
AUTHORS
opengl.org
opengl.org 03/16/2013 GLDRAWTRANSFORMFEEDB(3G)
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