Index for Section 3G

Alphabetical listing for G

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glGetTexEnv(3G)
NAME
  glGetTexEnv, glGetTexEnvfv, glGetTexEnviv - return texture environment
  parameters

SYNOPSIS
  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 specifies 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 environment 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 representation 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.

  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 execution of glEnd().

SEE ALSO
  glActiveTextureARB(3), glTexEnv(3)

Index for Section 3G

Alphabetical listing for G

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