diff options
Diffstat (limited to 'nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/copytexsubimage2d.gl')
| -rw-r--r-- | nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/copytexsubimage2d.gl | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/copytexsubimage2d.gl b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/copytexsubimage2d.gl new file mode 100644 index 000000000..850b17014 --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/copytexsubimage2d.gl @@ -0,0 +1,154 @@ +_C_ License Applicability. Except to the extent portions of this file are +_C_ made subject to an alternative license as permitted in the SGI Free +_C_ Software License B, Version 1.1 (the "License"), the contents of this +_C_ file are subject only to the provisions of the License. You may not use +_C_ this file except in compliance with the License. You may obtain a copy +_C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 +_C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: +_C_ +_C_ http://oss.sgi.com/projects/FreeB +_C_ +_C_ Note that, as provided in the License, the Software is distributed on an +_C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS +_C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND +_C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A +_C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT. +_C_ +_C_ Original Code. The Original Code is: OpenGL Sample Implementation, +_C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, +_C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. +_C_ Copyright in any portions created by third parties is as indicated +_C_ elsewhere herein. All Rights Reserved. +_C_ +_C_ Additional Notice Provisions: The application programming interfaces +_C_ established by SGI in conjunction with the Original Code are The +_C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released +_C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version +_C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X +_C_ Window System(R) (Version 1.3), released October 19, 1998. This software +_C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation +_C_ published by SGI, but has not been independently verified as being +_C_ compliant with the OpenGL(R) version 1.2.1 Specification. +_C_ +_C_ The first character in this file must be an '_'! +_C_ Anything on a line after _C_ is ignored +_define(_filters,tbl|eqn)_C_ +_C_ eqn is automatically replaced with neqn for nroff +_header(CopyTexSubImage2D,copy a two-dimensional texture subimage) +_names(CopyTexSubImage2D) +.EQ +delim $$ +.EN +.SH PARAMETERS +_phead(_param1) +Specifies the target texture. +Must be _const(TEXTURE_2D). +_phead(_param2) +Specifies the level-of-detail number. +Level 0 is the base image level. +Level \f2n\fP is the \f2n\fPth mipmap reduction image. +_phead(_param3) +Specifies a texel offset in the x direction within the texture array. +_phead(_param4) +Specifies a texel offset in the y direction within the texture array. +_phead(_param5 _param6) +Specify the window coordinates of the lower left corner +of the rectangular region of pixels to be copied. +_phead(_param7) +Specifies the width of the texture subimage. +_phead(_param8) +Specifies the height of the texture subimage. +.SH DESCRIPTION +_cmnd replaces a rectangular portion of a two-dimensional +texture image with pixels from the current _const(READ_BUFFER) (rather +than from main memory, as is the case for _cmnd(TexSubImage2D)). +.P +The screen-aligned pixel rectangle with lower left corner at +(_param5,\ _param6) and with +width _param7 and height _param8 replaces the portion of the +texture array with x indices _param3 through _param3$~+~$_param7$~-~$1, +inclusive, and y indices _param4 through _param4$~+~$_param8$~-~$1, +inclusive, at the mipmap level specified by _param2. +.P +The pixels in the rectangle are processed exactly as if +_cmnd(CopyPixels) 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. +.P +The destination rectangle in the texture array may not include any texels +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. +.P +If any of the pixels within the specified rectangle of the current +_const(READ_BUFFER) are outside the read window associated with the current +rendering context, then the values obtained for those pixels are undefined. +.P +No change is made to the \f2internalformat\fP, \f2width\fP, +\f2height\fP, or \f2border\fP parameters of the specified texture +array or to texel values outside the specified subregion. +.SH NOTES +_cmnd is available only if the GL version is 1.1 or greater. +.P +Texturing has no effect in color index mode. +.P +_cmnd(PixelStore) and _cmnd(PixelTransfer) modes affect texture images +in exactly the way they affect _cmnd(DrawPixels). +.P +When the _arbstring(imaging) extension is supported, the RGBA components +read from the framebuffer may be processed by the imaging pipeline. See +_cmnd(TexImage1D) for specific details. +.SH ERRORS +_const(INVALID_ENUM) is generated if _param1 is not _const(TEXTURE_2D). +.P +_const(INVALID_OPERATION) is generated if the texture array has not +been defined by a previous _cmnd(TexImage2D) or _cmnd(CopyTexImage2D) operation. +.P +_const(INVALID_VALUE) is generated if _param2 is less than 0. +.P +_const(INVALID_VALUE) may be generated if _param2 is greater +than $log sub 2 max$, +where $max$ is the returned value of _const(MAX_TEXTURE_SIZE). +.P +_const(INVALID_VALUE) is generated if _param5$ ~<~ ~-b$ or if +_param6$ ~<~ ~-b$, +where $b$ is the border width of the texture array. +.P +_const(INVALID_VALUE) is generated if $_eqnparam3 ~<~ -b$, +(_param3$~+~$_param7)$~>~(w ~-~b)$, +_param4$~<~ ~-b$, or +(_param4$~+~$_param8)$~>~(h ~-~b)$, +where $w$ is the _const(TEXTURE_WIDTH), +$h$ is the _const(TEXTURE_HEIGHT), +and $b$ is the _const(TEXTURE_BORDER) +of the texture image being modified. +Note that $w$ and $h$ +include twice the border width. +.P +_const(INVALID_OPERATION) is generated if _cmnd is executed +between the execution of _cmnd(Begin) and the corresponding +execution of _cmnd(End). +.SH ASSOCIATED GETS +_cmnd(GetTexImage) +.br +_cmnd(IsEnabled) with argument _const(TEXTURE_2D) +.SH SEE ALSO +_cmnd(CopyPixels), +_cmnd(CopyTexImage1D), +_cmnd(CopyTexImage2D), +_cmnd(CopyTexSubImage1D), +_cmnd(CopyTexSubImage3D), +_cmnd(PixelStore), +_cmnd(PixelTransfer), +_cmnd(ReadBuffer), +_cmnd(TexEnv), +_cmnd(TexGen), +_cmnd(TexImage1D), +_cmnd(TexImage2D), +_cmnd(TexImage3D), +_cmnd(TexParameter), +_cmnd(TexSubImage1D), +_cmnd(TexSubImage2D), +_cmnd(TexSubImage3D) |