glDrawTransformFeedbackStreamInstanced man page on RedHat
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GLDRAWTRANSFORMFEEDB(3G) OpenGL Manual GLDRAWTRANSFORMFEEDB(3G)
NAME
glDrawTransformFeedbackStreamInstanced - render multiple instances of
primitives using a count derived from a specifed stream of a transform
feedback object
C SPECIFICATION
void glDrawTransformFeedbackStreamInstanced(GLenum mode, GLuint id,
GLuint stream,
GLsizei primcount);
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.
stream
Specifies the index of the transform feedback stream from which to
retrieve a primitive count.
primcount
Specifies the number of instances of the geometry to render.
DESCRIPTION
glDrawTransformFeedbackStreamInstanced draws multiple copies of a range
of primitives of a type specified by mode using a count retrieved from
the transform feedback stream specified by stream of the transform
feedback object specified by id. Calling
glDrawTransformFeedbackStreamInstanced is equivalent to calling
glDrawArraysInstanced() with mode and primcount as specified, first set
to zero, and count set to the number of vertices captured on vertex
stream stream the last time transform feedback was active on the
transform feedback object named by id.
Calling glDrawTransformFeedbackInstanced() is equivalent to calling
glDrawTransformFeedbackStreamInstanced with stream set to zero.
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_VALUE is generated if stream is greater than or equal to the
value of GL_MAX_VERTEX_STREAMS.
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(), glDrawTransformFeedback(),
glDrawTransformFeedbackStream().
COPYRIGHT
Copyright © 2010-2011 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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