WebGLRenderingContext.getProgramParameter() - Web APIs 编辑

The WebGLRenderingContext.getProgramParameter() method of the WebGL API returns information about the given program.

Syntax

any gl.getProgramParameter(program, pname);

Parameters

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.

Return value

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

Examples

gl.getProgramParameter(program, gl.DELETE_STATUS);

Specifications

Browser compatibility

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See also

• WebGLRenderingContext.getShaderParameter()