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The WebGLRenderingContext.clearColor() method of the WebGL API specifies the color values used when clearing color buffers.
This specifies what color values to use when calling the clear() method. The values are clamped between 0 and 1.
Syntax
void gl.clearColor(red, green, blue, alpha);
Parameters
red- A
GLclampfspecifying the red color value used when the color buffers are cleared. Default value: 0. green- A
GLclampfspecifying the green color value used when the color buffers are cleared. Default value: 0. blue- A
GLclampfspecifying the blue color value used when the color buffers are cleared. Default value: 0. alpha- A
GLclampfspecifying the alpha (transparency) value used when the color buffers are cleared. Default value: 0.
Return value
None.
Examples
gl.clearColor(1, 0.5, 0.5, 3);
To get the current clear color, query the COLOR_CLEAR_VALUE constant which returns a Float32Array.
gl.getParameter(gl.COLOR_CLEAR_VALUE); // Float32Array[1, 0.5, 0.5, 1]
Specifications
| Specification | Status | Comment |
|---|---|---|
| WebGL 1.0 The definition of 'clearColor' in that specification. |
Recommendation | Initial definition. |
| OpenGL ES 2.0 The definition of 'glClearColor' in that specification. |
Standard | Man page of the OpenGL API. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 9 | 4.0 (2.0) | 11 | 12 | 5.1 |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | ? | 25 | (Yes) | ? | 12 | 8.1 |