glTexSubImage1D — specify a one-dimensional texture subimage
void glTexSubImage1D( | GLenum | target, |
GLint | level, | |
GLint | xoffset, | |
GLsizei | width, | |
GLenum | format, | |
GLenum | type, | |
const GLvoid * | data) ; |
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_COLOR_INDEX
,
GL_RED
,
GL_GREEN
,
GL_BLUE
,
GL_ALPHA
,
GL_RGB
,
GL_BGR
,
GL_RGBA
,
GL_BGRA
,
GL_LUMINANCE
, and
GL_LUMINANCE_ALPHA
.
type
Specifies the data type of the pixel data.
The following symbolic values are accepted:
GL_UNSIGNED_BYTE
,
GL_BYTE
,
GL_BITMAP
,
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.
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
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.
glTexSubImage1D
is available only if the GL version is 1.1 or greater.
Texturing has no effect in color index mode.
glPixelStore and glPixelTransfer modes affect texture images in exactly the way they affect glDrawPixels.
Formats GL_BGR
, and GL_BGRA
and types
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
are available only if the GL version
is 1.2 or greater.
For OpenGL versions 1.3 and greater, or when the ARB_multitexture
extension is supported, glTexSubImage1D
specifies a one-dimensional subtexture for the current texture unit,
specified with glActiveTexture.
When the ARB_imaging
extension is supported, the RGBA components
specified in data
may be processed by the imaging pipeline. See
glTexImage1D for specific details.
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_ENUM
is generated if type
is GL_BITMAP
and
format
is not GL_COLOR_INDEX
.
GL_INVALID_VALUE
is generated if level
is less than 0.
GL_INVALID_VALUE
may be generated if level
is greater
than
GL_MAX_TEXTURE_SIZE
.
GL_INVALID_VALUE
is generated if
GL_TEXTURE_WIDTH
, and
GL_TEXTURE_BORDER
of the texture image being modified.
Note that
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
.
GL_INVALID_OPERATION
is generated if glTexSubImage1D
is executed
between the execution of glBegin and the corresponding
execution of glEnd.
glIsEnabled with argument GL_TEXTURE_1D
glGet with argument GL_PIXEL_UNPACK_BUFFER_BINDING
glActiveTexture, glCopyTexImage1D, glCopyTexImage2D, glCopyTexSubImage1D, glCopyTexSubImage2D, glCopyTexSubImage3D, glDrawPixels, glPixelStore, glPixelTransfer, glTexEnv, glTexGen, glTexImage1D, glTexImage2D, glTexImage3D, glTexParameter, glTexSubImage2D, glTexSubImage3D
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/.