MirOS Manual: glGetTexEnv(3), glGetTexEnvfv(3), glGetTexEnviv(3)


GLGETTEXENV(3G)     UNIX Programmer's Manual      GLGETTEXENV(3G)

NAME

     glGetTexEnvfv, glGetTexEnviv - return texture environment
     parameters

C SPECIFICATION

     void glGetTexEnvfv( GLenum target,
                         GLenum pname,
                         GLfloat *params )
     void glGetTexEnviv( GLenum target,
                         GLenum pname,
                         GLint *params )

PARAMETERS

     target  Specifies a texture environment. Must be
             GL_TEXTURE_ENV.

     pname   Specifies the symbolic name of a texture environment
             parameter. Accepted values are GL_TEXTURE_ENV_MODE
             and GL_TEXTURE_ENV_COLOR.

     params  Returns the requested data.

DESCRIPTION

     glGetTexEnv returns in params selected values of a texture
     environment that was specified with glTexEnv. target speci-
     fies a texture environment. Currently, only one texture
     environment is defined and supported: GL_TEXTURE_ENV.

     pname names a specific texture environment parameter, as
     follows:

     GL_TEXTURE_ENV_MODE
               params returns the single-valued texture environ-
               ment mode, a symbolic constant. The initial value
               is GL_MODULATE.

     GL_TEXTURE_ENV_COLOR
               params returns four integer or floating-point
               values that are the texture environment color.
               Integer values, when requested, are linearly
               mapped from the internal floating-point represen-
               tation such that 1.0 maps to the most positive
               representable integer, and -1.0 maps to the most
               negative representable integer. The initial value
               is (0, 0, 0, 0).

NOTES

     If an error is generated, no change is made to the contents
     of params.

MirOS BSD #10-current  Printed 03.04.2017                       1

GLGETTEXENV(3G)     UNIX Programmer's Manual      GLGETTEXENV(3G)

     When the GL_ARB_multitexture extension is supported,
     glGetTexEnv returns the texture environment parameters for
     the active texture unit.

ERRORS

     GL_INVALID_ENUM is generated if target or pname is not an
     accepted value.

     GL_INVALID_OPERATION is generated if glGetTexEnv is executed
     between the execution of glBegin and the corresponding exe-
     cution of glEnd.

SEE ALSO

     glActiveTextureARB(3G), glTexEnv(3G)

MirOS BSD #10-current  Printed 03.04.2017                       2

Generated on 2017-04-03 16:26:17 by $MirOS: src/scripts/roff2htm,v 1.88 2017/01/29 00:51:06 tg Exp $

These manual pages and other documentation are copyrighted by their respective writers; their source is available at our CVSweb, AnonCVS, and other mirrors. The rest is Copyright © 2002–2017 The MirOS Project, Germany.
This product includes material provided by mirabilos.

This manual page’s HTML representation is supposed to be valid XHTML/1.1; if not, please send a bug report — diffs preferred.