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GLGETTEXENV() GLGETTEXENV()

glGetTexEnvfv, glGetTexEnviv - return texture environment parameters

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

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.

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).

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

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.

glTexEnv

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