Function glGetTexEnvfv

glGetTexEnv returns in params selected values of a texture environment that was specified with glTexEnv. target specifies a texture environment.

When target is GL_TEXTURE_FILTER_CONTROL, pname must be GL_TEXTURE_LOD_BIAS. When target is GL_POINT_SPRITE, pname must be GL_COORD_REPLACE. When target is GL_TEXTURE_ENV, pname can be GL_TEXTURE_ENV_MODE, GL_TEXTURE_ENV_COLOR, GL_COMBINE_RGB, GL_COMBINE_ALPHA, GL_RGB_SCALE, GL_ALPHA_SCALE, GL_SRC0_RGB, GL_SRC1_RGB, GL_SRC2_RGB, GL_SRC0_ALPHA, GL_SRC1_ALPHA, or GL_SRC2_ALPHA.

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_LOD_BIAS params returns a single floating-point value that is the texture level-of-detail bias. The initial value is 0.

• GL_COMBINE_RGB params returns a single symbolic constant value representing the current RGB combine mode. The initial value is GL_MODULATE.

• GL_COMBINE_ALPHA params returns a single symbolic constant value representing the current alpha combine mode. The initial value is GL_MODULATE.

• GL_SRC0_RGB params returns a single symbolic constant value representing the texture combiner zero's RGB source. The initial value is GL_TEXTURE.

• GL_SRC1_RGB params returns a single symbolic constant value representing the texture combiner one's RGB source. The initial value is GL_PREVIOUS.

• GL_SRC2_RGB params returns a single symbolic constant value representing the texture combiner two's RGB source. The initial value is GL_CONSTANT.

• GL_SRC0_ALPHA params returns a single symbolic constant value representing the texture combiner zero's alpha source. The initial value is GL_TEXTURE.

• GL_SRC1_ALPHA params returns a single symbolic constant value representing the texture combiner one's alpha source. The initial value is GL_PREVIOUS.

• GL_SRC2_ALPHA params returns a single symbolic constant value representing the texture combiner two's alpha source. The initial value is GL_CONSTANT.

• GL_OPERAND0_RGB params returns a single symbolic constant value representing the texture combiner zero's RGB operand. The initial value is GL_SRC_COLOR.

• GL_OPERAND1_RGB params returns a single symbolic constant value representing the texture combiner one's RGB operand. The initial value is GL_SRC_COLOR.

• GL_OPERAND2_RGB params returns a single symbolic constant value representing the texture combiner two's RGB operand. The initial value is GL_SRC_ALPHA.

• GL_OPERAND0_ALPHA params returns a single symbolic constant value representing the texture combiner zero's alpha operand. The initial value is GL_SRC_ALPHA.

• GL_OPERAND1_ALPHA params returns a single symbolic constant value representing the texture combiner one's alpha operand. The initial value is GL_SRC_ALPHA.

• GL_OPERAND2_ALPHA params returns a single symbolic constant value representing the texture combiner two's alpha operand. The initial value is GL_SRC_ALPHA.

• GL_RGB_SCALE params returns a single floating-point value representing the current RGB texture combiner scaling factor. The initial value is 1.0.

• GL_ALPHA_SCALE params returns a single floating-point value representing the current alpha texture combiner scaling factor. The initial value is 1.0.

• GL_COORD_REPLACE params returns a single boolean value representing the current point sprite texture coordinate replacement enable state. The initial value is GL_FALSE.

Summary

return texture environment parameters

See

glGetTexEnv