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<STRONG>NAME</STRONG>
<STRONG>glGetTexEnvfv,</STRONG> <STRONG>glGetTexEnviv</STRONG> - return texture environment
parameters
<STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>
void <STRONG>glGetTexEnvfv</STRONG>( GLenum <EM>target</EM>,
GLenum <EM>pname</EM>,
GLfloat *<EM>params</EM> )
void <STRONG>glGetTexEnviv</STRONG>( GLenum <EM>target</EM>,
GLenum <EM>pname</EM>,
GLint *<EM>params</EM> )
<STRONG>PARAMETERS</STRONG>
<EM>target</EM> Specifies a texture environment. Must be
<STRONG>GL_TEXTURE_ENV</STRONG>.
<EM>pname</EM> Specifies the symbolic name of a texture environment
parameter. Accepted values are <STRONG>GL_TEXTURE_ENV_MODE</STRONG>
and <STRONG>GL_TEXTURE_ENV_COLOR</STRONG>.
<EM>params</EM> Returns the requested data.
<STRONG>DESCRIPTION</STRONG>
<STRONG>glGetTexEnv</STRONG> returns in <EM>params</EM> selected values of a texture
environment that was specified with <STRONG>glTexEnv</STRONG>. <EM>target</EM>
specifies a texture environment. Currently, only one
texture environment is defined and supported:
<STRONG>GL_TEXTURE_ENV</STRONG>.
<EM>pname</EM> names a specific texture environment parameter, as
follows:
<STRONG>GL_TEXTURE_ENV_MODE</STRONG>
<EM>params</EM> returns the single-valued texture
environment mode, a symbolic constant. The initial
value is <STRONG>GL_MODULATE</STRONG>.
<STRONG>GL_TEXTURE_ENV_COLOR</STRONG>
<EM>params</EM> 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).
<STRONG>NOTES</STRONG>
If an error is generated, no change is made to the contents
of <EM>params</EM>.
<STRONG>ERRORS</STRONG>
<STRONG>GL_INVALID_ENUM</STRONG> is generated if <EM>target</EM> or <EM>pname</EM> is not an
accepted value.
<STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glGetTexEnv</STRONG> is executed
between the execution of <STRONG>glBegin</STRONG> and the corresponding
execution of <STRONG>glEnd</STRONG>.
<STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>
<STRONG>glTexEnv</STRONG>
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