glGetFragDataLocation — query the bindings of color numbers to user-defined varying out variables
| ||GLuint program,|
|const char * name |
The name of the program containing varying out variable whose binding to query
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 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|
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