ARB_program_interface_query
Contents
Overview
Numbers ARB Extension #134
Requires OpenGL 2.0
Affected By
- ARB_transform_feedback
- EXT_transform_feedback
- ARB_uniform_buffer_object
- ARB_shader_subroutine
- ARB_shader_atomic_counters
- ARB_shader_storage_buffer_object
- ARB_arrays_of_arrays
- ARB_compute_shader
- ARB_explicit_uniform_location
Since OpenGL 4.3 Core Profile Specification
这个扩展给应用程序提供一组统一的查询命令。这组命令用来查询被program objects用来与应用程序代码或其它program object通信的各种interfaces和resources的属性。
这个扩展定义了两个概念:interfaces和active resources
Interfaces
Provides a way for the program to communicate with application code, fixed-function OpenGL pipeline stages, and other programs.
例如:
- inputs
- outputs
- uniforms
- uniform blocks
- subroutines and subroutine uniforms
- atomic counter buffers
Active Resources
Each interface of a program has a set of active resources used by the program.