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glGetTexEnvfv function

Applies to: desktop apps only

The glGetTexEnvfv and glGetTexEnviv functions return texture environment parameters.

Syntax

void WINAPI glGetTexEnvfv(
  GLenum target,
  GLenum pname,
  GLfloat *params
);

Parameters

target

A texture environment. Must be GL_TEXTURE_ENV.

pname

The symbolic name of a texture environment parameter. The following values are accepted.

ValueMeaning
GL_TEXTURE_ENV_MODE

The params parameter returns the single-valued texture environment mode, a symbolic constant.

GL_TEXTURE_ENV_COLOR

The params parameter 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 representation such that 1.0 maps to the most positive representable integer, and -1.0 maps to the most negative representable integer.

 

params

Returns the requested data.

Return value

This function does not return a value.

Error codes

The following error codes can be retrieved by the glGetError function.

NameMeaning
GL_INVALID_ENUM

target or pname was not an accepted value.

GL_INVALID_OPERATION

The function was called between a call to glBegin and the corresponding call to glEnd.

Remarks

The glGetTexEnv function returns in params selected values of a texture environment that was specified with glTexEnv. The target parameter specifies a texture environment. Currently, only one texture environment is defined and supported: GL_TEXTURE_ENV.

The pname parameter names a specific texture environment parameter.

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

Requirements

Minimum supported client

Windows 2000 Professional

Minimum supported server

Windows 2000 Server

Header

Gl.h

Library

Opengl32.lib

DLL

Opengl32.dll

See also

glBegin
glEnd
glTexEnv

 

 

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Build date: 3/6/2012

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