fglcopytexsubimage1d man page on IRIX

Man page or keyword search:  
man Server   31559 pages
apropos Keyword Search (all sections)
Output format
IRIX logo
[printable version]



fglCopyTexSubImage1D(3G)       OpenGL Reference	      fglCopyTexSubImage1D(3G)

NAME
     fglCopyTexSubImage1D - copy a one-dimensional texture subimage

FORTRAN SPECIFICATION
     SUBROUTINE fglCopyTexSubImage1D( INTEGER*4 target,
				      INTEGER*4 level,
				      INTEGER*4 xoffset,
				      INTEGER*4 x,
				      INTEGER*4 y,
				      INTEGER*4 width )

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 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.

DESCRIPTION
     fglCopyTexSubImage1D replaces a portion of a one-dimensional texture
     image with pixels from the current GL_READ_BUFFER (rather than from main
     memory, as is the case for fglTexSubImage1D).

     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 xoffset + width - 1, inclusive. The destination in the texture
     array may not include any texels outside the texture array as it was
     originally specified.

     The pixels in the row are processed exactly as if fglCopyPixels 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 format for storage in the texel
     array.

     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, then 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.

									Page 1

fglCopyTexSubImage1D(3G)       OpenGL Reference	      fglCopyTexSubImage1D(3G)

NOTES
     fglCopyTexSubImage1D is available only if the GL version is 1.1 or
     greater.

     Texturing has no effect in color index mode.

     fglPixelStore and fglPixelTransfer modes affect texture images in exactly
     the way they affect fglDrawPixels.

     When the GL_ARB_imaging extension is supported, the RGBA components
     copied from the framebuffer may be processed by the imaging pipeline.
     See fglTexImage1D for specific details.

ERRORS
     GL_INVALID_ENUM is generated if target is not GL_TEXTURE_1D.

     GL_INVALID_OPERATION is generated if the texture array has not been
     defined by a previous fglTexImage1D or fglCopyTexImage1D operation.

     GL_INVALID_VALUE is generated if level is less than 0.

     GL_INVALID_VALUE may be generated if level>log  max, where max is the
						   2
     returned value of GL_MAX_TEXTURE_SIZE.

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

     GL_INVALID_VALUE is generated if xoffset <	 -b, or
     (xoffset + width) > (w-b), where w is the GL_TEXTURE_WIDTH, and b is the
     GL_TEXTURE_BORDER of the texture image being modified.  Note that w
     includes twice the border width.

ASSOCIATED GETS
     fglGetTexImage
     fglIsEnabled with argument GL_TEXTURE_1D

MACHINE DEPENDENCIES
     fglCopyTexSubImage1D and fglCopyTexSubImage1DEXT are not supported on
     RealityEngine, RealityEngine2, and VTX systems.

     On InfiniteReality systems, there is a performance benefit when the width
     of the image to be transferred to texture memory is a multiple of 8.

     Texture borders are not supported on InfiniteReality systems.
     Applications should use borderless textures and GL_CLAMP_TO_EDGE_SGIS
     wrap mode.

     On High Impact and Maximum Impact systems, if the right side of the image
     to be transferred to texture memory is not the right side of the texture,
     then its index must be a multiple of 32, where index = xoffset+width.
     Otherwise it will generate a GL_INVALID_VALUE error.

									Page 2

fglCopyTexSubImage1D(3G)       OpenGL Reference	      fglCopyTexSubImage1D(3G)

SEE ALSO
     fglCopyPixels, fglCopyTexImage1D, fglCopyTexImage2D,
     fglCopyTexSubImage2D, fglCopyTexSubImage3D, fglPixelStore,
     fglPixelTransfer, fglReadBuffer, fglTexEnv, fglTexGen, fglTexImage1D,
     fglTexImage2D, fglTexImage3D, fglTexParameter, fglTexSubImage1D,
     fglTexSubImage2D, fglTexSubImage3D

									Page 3

[top]

List of man pages available for IRIX

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