glCopyTexSubImage3D man page on Darwin

Man page or keyword search:  
man Server   23457 pages
apropos Keyword Search (all sections)
Output format
Darwin logo
[printable version]

GLCOPYTEXSUBIMAGE3D(3G)				       GLCOPYTEXSUBIMAGE3D(3G)

NAME
       glCopyTexSubImage3D - copy a three-dimensional texture subimage

C SPECIFICATION
       void glCopyTexSubImage3D( GLenum target,
				 GLint level,
				 GLint xoffset,
				 GLint yoffset,
				 GLint zoffset,
				 GLint x,
				 GLint y,
				 GLsizei width,
				 GLsizei height )

PARAMETERS
       target	Specifies the target texture.  Must be GL_TEXTURE_3D

       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.

       yoffset	Specifies a texel offset in the y direction within the texture
		array.

       zoffset	Specifies a texel offset in the z direction within the texture
		array.

       x, y	Specify the window coordinates of the lower left corner of the
		rectangular region of pixels to be copied.

       width	Specifies the width of the texture subimage.

       height	Specifies the height of the texture subimage.

DESCRIPTION
       glCopyTexSubImage3D replaces a rectangular portion  of  a  three-dimen‐
       sional  texture	image  with  pixels  from  the	current GL_READ_BUFFER
       (rather than from main memory, as is the case for glTexSubImage3D).

       The screen-aligned pixel rectangle with lower left corner at (x, y) and
       with  width width and height height replaces the portion of the texture
       array with x indices xoffset through xoffset+width-1, inclusive, and  y
       indices yoffset through yoffset+height-1, inclusive, at z index zoffset
       and at the mipmap level specified by level.

       The pixels in the rectangle 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
       [0, 1] and then converted to the texture's internal  for storage in the
       texel array.

       The destination rectangle in the texture array may not include any tex‐
       els  outside  the  texture array as it was originally specified.	 It is
       not an error to specify a subtexture with zero  width  or  height,  but
       such a specification has no effect.

       If  any	of  the	 pixels	 within the specified rectangle of the current
       GL_READ_BUFFER are outside the read window associated with the  current
       rendering  context, then the values obtained for those pixels are unde‐
       fined.

       No change is made to the internalformat, width, height, depth, or  bor‐
       der  parameters	of the specified texture array or to texel values out‐
       side the specified subregion.

NOTES
       glCopyTexSubImage3D is available only if	 the  GL  version  is  1.2  or
       greater.

       Texturing has no effect in color index mode.

       glPixelStore and glPixelTransfer modes affect texture images in exactly
       the way they affect glDrawPixels.

       When the GL_ARB_imaging extension is  supported,	 the  RGBA  components
       copied  from  the framebuffer may be processed by the imaging pipeline,
       as if they were a two-dimensional texture.  See glTexImage2D  for  spe‐
       cific details.

ERRORS
       GL_INVALID_ENUM is generated if target is not GL_TEXTURE_3D.

       GL_INVALID_OPERATION  is	 generated  if	the texture array has not been
       defined by a previous glTexImage3D operation.

       GL_INVALID_VALUE is generated if level is less than 0.

       GL_INVALID_VALUE may be generated if level is greater  than  log2(max),
       where max is the returned value of GL_MAX_3D_TEXTURE_SIZE.

       GL_INVALID_VALUE	 is  generated	if x < -b or if y < -b, where b is the
       border width of the texture array.

       GL_INVALID_VALUE is generated if xoffset < -b, (xoffset+width)>(w  -b),
       yoffset< -b, (yoffset+height) >(h -b), zoffset< -b, or zoffset >(d -b),
       where w is the GL_TEXTURE_WIDTH, h is the  GL_TEXTURE_HEIGHT, d is  the
       GL_TEXTURE_DEPTH,  and  b is the GL_TEXTURE_BORDER of the texture image
       being modified.	Note that w, h, and d include twice the border width.

       GL_INVALID_OPERATION is generated if  glCopyTexSubImage3D  is  executed
       between	the  execution	of  glBegin and the corresponding execution of
       glEnd.

ASSOCIATED GETS
       glGetTexImage
       glIsEnabled with argument GL_TEXTURE_3D

SEE ALSO
       glCopyPixels, glCopyTexImage1D, glCopyTexImage2D,  glCopyTexSubImage1D,
       glCopyTexSubImage2D,   glPixelStore,   glPixelTransfer,	 glReadBuffer,
       glTexEnv,   glTexGen,   glTexImage1D,	glTexImage2D,	 glTexImage3D,
       glTexParameter, glTexSubImage1D, glTexSubImage2D, glTexSubImage3D

						       GLCOPYTEXSUBIMAGE3D(3G)
[top]

List of man pages available for Darwin

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net