Limited availability
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.
drawBuffersWEBGL(buffers)
Parameters
buffers
An Array
of GLenum
constants 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_WEBGL
The fragment shader is written the n-th color attachment of the framebuffer.ext.COLOR_ATTACHMENT1_WEBGL
ext.COLOR_ATTACHMENT2_WEBGL
ext.COLOR_ATTACHMENT3_WEBGL
ext.COLOR_ATTACHMENT4_WEBGL
ext.COLOR_ATTACHMENT5_WEBGL
ext.COLOR_ATTACHMENT6_WEBGL
ext.COLOR_ATTACHMENT7_WEBGL
ext.COLOR_ATTACHMENT8_WEBGL
ext.COLOR_ATTACHMENT9_WEBGL
ext.COLOR_ATTACHMENT10_WEBGL
ext.COLOR_ATTACHMENT11_WEBGL
ext.COLOR_ATTACHMENT12_WEBGL
ext.COLOR_ATTACHMENT13_WEBGL
ext.COLOR_ATTACHMENT14_WEBGL
ext.COLOR_ATTACHMENT15_WEBGL
None (undefined
).
See WEBGL_draw_buffers
for more context with this example code.
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]
]);
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