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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