Unsere Freiwilligen haben diesen Artikel noch nicht in Deutsch übersetzt. Machen Sie mit und helfen Sie, das zu erledigen!
The WebGLRenderingContext.getProgramParameter() method of the WebGL API returns information about the given program.
Syntax
any gl.getProgramParameter(program, pname);
Parameters
- program
- A
WebGLProgramto get parameter information from. - pname
- A
Glenumspecifying the information to query. Possible values:gl.DELETE_STATUS: Returns aGLbooleanindicating whether or not the program is flagged for deletion.gl.LINK_STATUS: Returns aGLbooleanindicating whether or not the last link operation was successful.gl.VALIDATE_STATUS: Returns aGLbooleanindicating whether or not the last validation operation was successful.gl.ATTACHED_SHADERS: Returns aGLintindicating the number of attached shaders to a program.gl.ACTIVE_ATTRIBUTES: Returns aGLintindicating the number of active attribute variables to a program.gl.ACTIVE_UNIFORMS: Returns aGLintindicating 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 aGLenumindicating the buffer mode when transform feedback is active. May begl.SEPARATE_ATTRIBSorgl.INTERLEAVED_ATTRIBS.gl.TRANSFORM_FEEDBACK_VARYINGS: Returns aGLintindicating the number of varying variables to capture in transform feedback mode.gl.ACTIVE_UNIFORM_BLOCKS: Returns aGLintindicating 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
| Specification | Status | Comment |
|---|---|---|
| WebGL 1.0 The definition of 'getProgramParameter' in that specification. |
Recommendation | Initial definition. |
| OpenGL ES 2.0 The definition of 'glGetProgramiv' in that specification. |
Standard | Man page of the (similar) OpenGL API. |
| WebGL 2.0 The definition of 'getProgramParameter' in that specification. |
Editor's Draft | Adds new pname values:gl.TRANSFORM_FEEDBACK_BUFFER_MODE,gl.TRANSFORM_FEEDBACK_VARYINGS,gl.ACTIVE_UNIFORM_BLOCKS |
Browser compatibility
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 9 | 12 | 4.0 (2.0) | 11 | 12 | 5.1 |
| WebGL 2 | No support [2] | No support | Nightly build [1] | No support | No support | No support |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | ? | 25 | 4.0 (2.0) | 1.0 | ? | 12 | 8.0 |
| WebGL 2 | No support | No support | No support | No support | No support | No support | No support |
[1] WebGL 2 is enabled by default in Firefox Nightly. To enable it in a release version of Firefox, set the preference webgl.enable-prototype-webgl2 to true in about:config.
[2] To use an experimental implementation of WebGL 2 in Chrome, you have to start Chrome with the runtime flag --enable-unsafe-es3-apis.