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GLGETTEXENV() GLGETTEXENV() 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_TEX- TURE_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 environ- ment. Currently, only one texture environment is defined and sup- ported: 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 re- quested, are linearly mapped from the internal floating-point representation such that 1.0 maps to the most positive repre- sentable integer, and -1.0 maps to the most negative repre- sentable integer. The initial value is (0, 0, 0, 0). NOTES If an error is generated, no change is made to the contents of params. 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 glTexEnv GLGETTEXENV()
NAME | C SPECIFICATION | PARAMETERS | DESCRIPTION | NOTES | ERRORS | SEE ALSO
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