bionic (3) glDepthRangeIndexed.3G.gz

Provided by: opengl-4-man-doc_1.0~svn33624-1_all bug

NAME
       glDepthRangeIndexed - specify mapping of depth values from normalized device coordinates to window
       coordinates for a specified viewport


C SPECIFICATION
       void glDepthRangeIndexed(GLuint index, GLdouble nearVal, GLdouble farVal);


PARAMETERS
       index
           Specifies the index of the viewport whose depth range to update.

       nearVal
           Specifies the mapping of the near clipping plane to window coordinates. The initial value is 0.

       farVal
           Specifies the mapping of the far clipping plane to window coordinates. The initial value is 1.


DESCRIPTION
       After clipping and division by w, depth coordinates range from -1 to 1, corresponding to the near and far
       clipping planes. Each viewport has an independent depth range specified as a linear mapping of the
       normalized depth coordinates in this range to window depth coordinates. Regardless of the actual depth
       buffer implementation, window coordinate depth values are treated as though they range from 0 through 1
       (like color components).  glDepthRangeIndexed specifies a linear mapping of the normalized depth
       coordinates in this range to window depth coordinates for a specified viewport. Thus, the values accepted
       by glDepthRangeIndexed are both clamped to this range before they are accepted.

       The index parameter specifies the index of first viewport whose depth range to modify and must be less
       than the value of GL_MAX_VIEWPORTS.  nearVal and farVal specify near and far values of the depth range
       for the specified viewport, respectively.

       The setting of (0,1) maps the near plane to 0 and the far plane to 1. With this mapping, the depth buffer
       range is fully utilized.


NOTES
       It is not necessary that the near plane distance be less than the far plane distance. Reverse mappings
       such as nearVal = 1, and farVal = 0 are acceptable.

       The type of the nearVal and farVal parameters was changed from GLclampd to GLdouble. This change is
       transparent to user code and is described in detail on the removedTypes() page.


ERRORS
       GL_INVALID_VALUE is generated if index is greater than or equal to the value of GL_MAX_VIEWPORTS.


ASSOCIATED GETS
       glGet() with argument GL_DEPTH_RANGE


VERSION SUPPORT
       ┌────────────────────┬───────────────────────────────────────────────────────────────────────┐
       │                    │                OpenGL Version                                         │
       ├────────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │Function            │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
       │/                   │     │     │     │     │     │     │     │     │     │     │     │     │
       │Feature             │     │     │     │     │     │     │     │     │     │     │     │     │
       │Name                │     │     │     │     │     │     │     │     │     │     │     │     │
       ├────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │glDepthRangeIndexed │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └────────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘


SEE ALSO
       glDepthFunc(), glDepthRange(), glDepthRangeArray(), glPolygonOffset(), glViewportArray(), glViewport(),
       removedTypes()


       Copyright © 2010-2014 Khronos Group. This material may be distributed subject to the terms and conditions
       set forth in the Open Publication License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.


       Copyright © 2010-2014 Khronos Group

[FIXME: source]                                    01/03/2018                            GLDEPTHRANGEINDEXED(3G)