WebGLRenderingContext.blendColor() - Web APIs 编辑

The WebGLRenderingContext.blendColor() method of the WebGL API is used to set the source and destination blending factors.

Syntax

void gl.blendColor(red, green, blue, alpha);

Parameters

red

A GLclampf for the red component in the range of 0 to 1.

green

A GLclampf for the green component in the range of 0 to 1.

blue

A GLclampf for the blue component in the range of 0 to 1.

alpha

A GLclampf for the alpha component (transparency) in the range of 0 to 1.

Return value

None.

Examples

To set the blend color, use:

gl.blendColor(0, 0.5, 1, 1);

To get the blend color, query the BLEND_COLOR constant which returns a Float32Array.

gl.getParameter(gl.BLEND_COLOR);
// Float32Array[0, 0.5, 1, 1]

Specifications

Browser compatibility

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See also

• WebGLRenderingContext.blendEquation()
• WebGLRenderingContext.blendFunc()