ANGLE_instanced_arrays.drawElementsInstancedANGLE()

The ANGLE_instanced_arrays.drawElementsInstancedANGLE() method of the WebGL API renders primitives from array data like the gl.drawElements() method. In addition, it can execute multiple instances of a set of elements.

Note: When using WebGL2, this method is available as gl.drawElementsInstanced() by default.

Syntax

void ext.drawElementsInstancedANGLE(mode, count, type, offset, primcount);

Parameters

mode
A GLenum specifying the type primitive to render. Possible values are:
  • gl.POINTS: Draws a single dot.
  • gl.LINE_STRIP: Draws a straight line to the next vertex.
  • gl.LINE_LOOP: Draws a straight line to the next vertex, and connects the last vertex back to the first.
  • gl.LINES: Draws a line between a pair of vertices.
  • gl.TRIANGLE_STRIP
  • gl.TRIANGLE_FAN
  • gl.TRIANGLES: Draws a triangle for a group of three vertices.
count
A GLsizei specifying the number of elements to be rendered.
type
A GLenum specifying the type of the values in the element array buffer. Possible values are:
offset
A GLintptr specifying an offset in the element array buffer. Must be a valid multiple of the size of the given type.
primcount
A GLsizei specifying the number of instances of the set of elements to execute.

Return value

None.

Exceptions

  • If mode is not one of the accepted values, a gl.INVALID_ENUM error is thrown.
  • If offset is a invalid multiple of the size of the given type, a gl.INVALID_OPERATION error is thrown.
  • If count or primcount are negative, a gl.INVALID_VALUE error is thrown.

Examples

var ext = gl.getExtension('ANGLE_instanced_arrays');
ext.drawElementsInstancedANGLE(gl.POINTS, 2, gl.UNSIGNED_SHORT, 0, 4);

Specifications

Specification Status Comment
ANGLE_instanced_arrays
The definition of 'ANGLE_instanced_arrays' in that specification.
Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
drawElementsInstancedANGLEChrome Full support 30Edge Full support 12Firefox Full support 33IE Full support 11Opera Full support 17Safari Full support 7WebView Android Full support 4.4Chrome Android Full support 30Firefox Android Full support YesOpera Android Full support 18Safari iOS Full support YesSamsung Internet Android Full support 2.0

Legend

Full support  
Full support

See also