glGetTexEnv

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 GL_TEXTURE_ENV_COLOR and GL_TEXTURE_LIGHTING_MODE_HP.

params

Returns the requested data.

Description

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).

GL_TEXTURE_LIGHTING_MODE_HP

params returns the single-valued texture lighting mode, a symbolic constant.

Notes

GL_TEXTURE_LIGHTING_MODE_HP is only supported if the GL_HP_texture_lighting extension is supported.

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