WEBGL_draw_buffers: drawBuffersWEBGL() method
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The WEBGL_draw_buffers.drawBuffersWEBGL() method is part
of the WebGL API and allows you to define
the draw buffers to which all fragment colors are written.
This method is part of the WEBGL_draw_buffers extension.
Note:
When using WebGL2,
this method is available as gl.drawBuffers()
by default and the constants are named gl.COLOR_ATTACHMENT1 etc. without the "WEBGL" suffix.
Syntax
js
drawBuffersWEBGL(buffers)
Parameters
buffers-
An
ArrayofGLenumconstants defining drawing buffers. Possible values:gl.NONE: The fragment shader is not written to any color buffer.gl.BACK: The fragment shader is written to the back color buffer.ext.COLOR_ATTACHMENT0_WEBGLThe fragment shader is written the n-th color attachment of the framebuffer.ext.COLOR_ATTACHMENT1_WEBGLext.COLOR_ATTACHMENT2_WEBGLext.COLOR_ATTACHMENT3_WEBGLext.COLOR_ATTACHMENT4_WEBGLext.COLOR_ATTACHMENT5_WEBGLext.COLOR_ATTACHMENT6_WEBGLext.COLOR_ATTACHMENT7_WEBGLext.COLOR_ATTACHMENT8_WEBGLext.COLOR_ATTACHMENT9_WEBGLext.COLOR_ATTACHMENT10_WEBGLext.COLOR_ATTACHMENT11_WEBGLext.COLOR_ATTACHMENT12_WEBGLext.COLOR_ATTACHMENT13_WEBGLext.COLOR_ATTACHMENT14_WEBGLext.COLOR_ATTACHMENT15_WEBGL
Return value
None (undefined).
Examples
See WEBGL_draw_buffers for more context with this example code.
js
ext.drawBuffersWEBGL([
ext.COLOR_ATTACHMENT0_WEBGL, // gl_FragData[0]
ext.COLOR_ATTACHMENT1_WEBGL, // gl_FragData[1]
ext.COLOR_ATTACHMENT2_WEBGL, // gl_FragData[2]
ext.COLOR_ATTACHMENT3_WEBGL, // gl_FragData[3]
]);
Specifications
| Specification |
|---|
| WebGL WEBGL_draw_buffers Khronos Ratified Extension Specification |
Browser compatibility
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