glGetFragDataLocation — query the bindings of color numbers to user-defined varying out variables
GLint glGetFragDataLocation(
|
GLuint program, |
const char * name); |
program
The name of the program containing varying out variable whose binding to query
name
The name of the user-defined varying out variable whose binding to query
glGetFragDataLocation retrieves the assigned color number binding for the user-defined
varying out variable name for program program. program
must have previously been linked. name must be a null-terminated string. If name
is not the name of an active user-defined varying out fragment shader variable within program, -1 will
be returned.
In OpenGL ES Shading Language version 3.00, output variables must be explicitly bound to fragment colors within the shader text. This query simply returns that binding information.
GL_INVALID_OPERATION is generated if program is not the name of a program object.
| OpenGL ES API Version | ||
|---|---|---|
| Function Name | 2.0 | 3.0 |
| glGetFragDataLocation | - | ✔ |
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