glGetTexEnvfv function
The glGetTexEnvfv and glGetTexEnviv functions return texture environment parameters.
Syntax
void WINAPI glGetTexEnvfv(
GLenum target,
GLenum pname,
GLfloat *params
);
Parameters
-
target
-
A texture environment. Must be GL_TEXTURE_ENV.
-
pname
-
The symbolic name of a texture environment parameter. The following values are accepted.
Value Meaning - GL_TEXTURE_ENV_MODE
The params parameter returns the single-valued texture environment mode, a symbolic constant. - GL_TEXTURE_ENV_COLOR
The params parameter 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. -
params
-
Returns the requested data.
Return value
This function does not return a value.
Error codes
The following error codes can be retrieved by the glGetError function.
| Name | Meaning |
|---|---|
|
target or pname was not an accepted value. |
|
The function was called between a call to glBegin and the corresponding call to glEnd. |
Remarks
The glGetTexEnv function returns in params selected values of a texture environment that was specified with glTexEnv. The target parameter specifies a texture environment. Currently, only one texture environment is defined and supported: GL_TEXTURE_ENV.
The pname parameter names a specific texture environment parameter.
If an error is generated, no change is made to the contents of params.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows 2000 Professional [desktop apps only] |
| Minimum supported server |
Windows 2000 Server [desktop apps only] |
| Header |
|
| Library |
|
| DLL |
|