WebGLRenderingContext.getProgramParameter()

WebGLRenderingContext.getProgramParameter() 方法返回WebGLProgram的信息。

语法

any gl.getProgramParameter(program, pname);

参数

program
A WebGLProgram to get parameter information from.
pname
A Glenum (en-US) specifying the information to query. Possible values:
  • gl.DELETE_STATUS: Returns a GLboolean (en-US) indicating whether or not the program is flagged for deletion.
  • gl.LINK_STATUS: Returns a GLboolean (en-US) indicating whether or not the last link operation was successful.
  • gl.VALIDATE_STATUS: Returns a GLboolean (en-US) indicating whether or not the last validation operation was successful.
  • gl.ATTACHED_SHADERS: Returns a GLint (en-US) indicating the number of attached shaders to a program.
  • gl.ACTIVE_ATTRIBUTES: Returns a GLint (en-US) indicating the number of active attribute variables to a program.
  • gl.ACTIVE_UNIFORMS: Returns a GLint (en-US) indicating the number of active uniform variables to a program.
  • When using a WebGL 2 context, the following values are available additionally:
    • gl.TRANSFORM_FEEDBACK_BUFFER_MODE: Returns a GLenum (en-US) indicating the buffer mode when transform feedback is active. May be gl.SEPARATE_ATTRIBS or gl.INTERLEAVED_ATTRIBS.
    • gl.TRANSFORM_FEEDBACK_VARYINGS: Returns a GLint (en-US) indicating the number of varying variables to capture in transform feedback mode.
    • gl.ACTIVE_UNIFORM_BLOCKS: Returns a GLint (en-US) indicating the number of uniform blocks containing active uniforms.

返回值

Returns the requested program information (as specified with pname).

例子

gl.getProgramParameter(program, gl.DELETE_STATUS);

Specifications

Specification Status Comment
WebGL 1.0
getProgramParameter		 Recommendation Initial definition.
OpenGL ES 2.0
glGetProgramiv		 Standard Man page of the (similar) OpenGL API.
WebGL 2.0
getProgramParameter		 Editor's Draft Adds new pname values:
gl.TRANSFORM_FEEDBACK_BUFFER_MODE,
gl.TRANSFORM_FEEDBACK_VARYINGS,
gl.ACTIVE_UNIFORM_BLOCKS

Browser compatibility

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See also