void glCopyTexSubImage1D(GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width)
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 the texel offset within the texture array. |
x, y | Specify the window coordinates of the left corner of the row of pixels to be copied. |
width | Specifies the width of the texture subimage. |
The screen-aligned pixel row with left corner at (x, y),
and with length width replaces the portion of the texture array
with x indices xoffset through
The pixels in the row are processed exactly as if
glCopyPixels had been called, but the
process stops just before final conversion. At this point all pixel
component values are clamped to the range
It is not an error to specify a subtexture with zero width, but such a specification has no effect. If any of the pixels within the specified row of the current GL_READ_BUFFER are outside the read window associated with the current rendering context, the values obtained for those pixels are undefined.
No change is made to the internalformat, width, or border parameters of the specified texture array or to texel values outside the specified subregion.
Texturing has no effect in color index mode.
glPixelStore and glPixelTransfer modes affect texture images in exactly the way they affect glDrawPixels.
GL_INVALID_OPERATION is generated if the texture array has not been defined by a previous glTexImage1D or glCopyTexImage1D operation.
GL_INVALID_VALUE is generated if level is less than 0.
GL_INVALID_VALUE may be generated if level
is greater than
GL_INVALID_VALUE is generated if
GL_INVALID_VALUE is generated if