glTexSubImage1D man page on Oracle
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GLTEXSUBIMAGE1D(3G) OpenGL Manual GLTEXSUBIMAGE1D(3G)
NAME
glTexSubImage1D - specify a one-dimensional texture subimage
C SPECIFICATION
void glTexSubImage1D(GLenum target, GLint level, GLint xoffset,
GLsizei width, GLenum format, GLenum type,
const GLvoid * data);
PARAMETERS
target
Specifies the target texture. Must be GL_TEXTURE_1D.
level
Specifies the level-of-detail number. Level 0 is the base image
level. Level n is the nth mipmap reduction image.
xoffset
Specifies a texel offset in the x direction within the texture
array.
width
Specifies the width of the texture subimage.
format
Specifies the format of the pixel data. The following symbolic
values are accepted: GL_RED, GL_RG, GL_RGB, GL_BGR, GL_RGBA, and
GL_BGRA.
type
Specifies the data type of the pixel data. The following symbolic
values are accepted: GL_UNSIGNED_BYTE, GL_BYTE, GL_UNSIGNED_SHORT,
GL_SHORT, GL_UNSIGNED_INT, GL_INT, GL_FLOAT,
GL_UNSIGNED_BYTE_3_3_2, GL_UNSIGNED_BYTE_2_3_3_REV,
GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT_5_6_5_REV,
GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_SHORT_4_4_4_4_REV,
GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_SHORT_1_5_5_5_REV,
GL_UNSIGNED_INT_8_8_8_8, GL_UNSIGNED_INT_8_8_8_8_REV,
GL_UNSIGNED_INT_10_10_10_2, and GL_UNSIGNED_INT_2_10_10_10_REV.
data
Specifies a pointer to the image data in memory.
DESCRIPTION
Texturing maps a portion of a specified texture image onto each
graphical primitive for which texturing is enabled. To enable or
disable one-dimensional texturing, call glEnable() and glDisable() with
argument GL_TEXTURE_1D.
glTexSubImage1D redefines a contiguous subregion of an existing
one-dimensional texture image. The texels referenced by data replace
the portion of the existing texture array with x indices xoffset and
xoffset + width - 1, inclusive. This region may not include any texels
outside the range of the texture array as it was originally specified.
It is not an error to specify a subtexture with width of 0, but such a
specification has no effect.
If a non-zero named buffer object is bound to the
GL_PIXEL_UNPACK_BUFFER target (see glBindBuffer()) while a texture
image is specified, data is treated as a byte offset into the buffer
object's data store.
NOTES
glPixelStore() modes affect texture images.
glTexSubImage1D specifies a one-dimensional subtexture for the current
texture unit, specified with glActiveTexture().
ERRORS
GL_INVALID_ENUM is generated if target is not one of the allowable
values.
GL_INVALID_ENUM is generated if format is not an accepted format
constant.
GL_INVALID_ENUM is generated if type is not a type constant.
GL_INVALID_VALUE is generated if level is less than 0.
GL_INVALID_VALUE may be generated if level is greater than log 2max,
where max is the returned value of GL_MAX_TEXTURE_SIZE.
GL_INVALID_VALUE is generated if xoffset < - b, or if xoffset + width >
w - b, where w is the GL_TEXTURE_WIDTH, and b is the width of the
GL_TEXTURE_BORDER of the texture image being modified. Note that w
includes twice the border width.
GL_INVALID_VALUE is generated if width is less than 0.
GL_INVALID_OPERATION is generated if the texture array has not been
defined by a previous glTexImage1D() operation.
GL_INVALID_OPERATION is generated if type is one of
GL_UNSIGNED_BYTE_3_3_2, GL_UNSIGNED_BYTE_2_3_3_REV,
GL_UNSIGNED_SHORT_5_6_5, or GL_UNSIGNED_SHORT_5_6_5_REV and format is
not GL_RGB.
GL_INVALID_OPERATION is generated if type is one of
GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_SHORT_4_4_4_4_REV,
GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_SHORT_1_5_5_5_REV,
GL_UNSIGNED_INT_8_8_8_8, GL_UNSIGNED_INT_8_8_8_8_REV,
GL_UNSIGNED_INT_10_10_10_2, or GL_UNSIGNED_INT_2_10_10_10_REV and
format is neither GL_RGBA nor GL_BGRA.
GL_INVALID_OPERATION is generated if a non-zero buffer object name is
bound to the GL_PIXEL_UNPACK_BUFFER target and the buffer object's data
store is currently mapped.
GL_INVALID_OPERATION is generated if a non-zero buffer object name is
bound to the GL_PIXEL_UNPACK_BUFFER target and the data would be
unpacked from the buffer object such that the memory reads required
would exceed the data store size.
GL_INVALID_OPERATION is generated if a non-zero buffer object name is
bound to the GL_PIXEL_UNPACK_BUFFER target and data is not evenly
divisible into the number of bytes needed to store in memory a datum
indicated by type.
ASSOCIATED GETS
glGetTexImage()
glGet() with argument GL_PIXEL_UNPACK_BUFFER_BINDING
SEE ALSO
glActiveTexture(), glCopyTexImage1D(), glCopyTexImage2D(),
glCopyTexSubImage1D(), glCopyTexSubImage2D(), glCopyTexSubImage3D(),
glPixelStore(), glTexImage1D(), glTexImage2D(), glTexImage3D(),
glTexParameter(), glTexSubImage2D(), glTexSubImage3D()
COPYRIGHT
Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
under the SGI Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.
AUTHORS
opengl.org
opengl.org 04/29/2014 GLTEXSUBIMAGE1D(3G)
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