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 specifying the information to query. Possible values:
  • gl.DELETE_STATUS: Returns a GLboolean indicating whether or not the program is flagged for deletion.
  • gl.LINK_STATUS: Returns a GLboolean indicating whether or not the last link operation was successful.
  • gl.VALIDATE_STATUS: Returns a GLboolean indicating whether or not the last validation operation was successful.
  • gl.ATTACHED_SHADERS: Returns a GLint indicating the number of attached shaders to a program.
  • gl.ACTIVE_ATTRIBUTES: Returns a GLint indicating the number of active attribute variables to a program.
  • gl.ACTIVE_UNIFORMS: Returns a GLint 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 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 indicating the number of varying variables to capture in transform feedback mode.
    • gl.ACTIVE_UNIFORM_BLOCKS: Returns a GLint 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