WebGLRenderingContext.copyTexSubImage2D()

The WebGLRenderingContext.copyTexSubImage2D() method of the WebGL API copies pixels from the current WebGLFramebuffer into an existing 2D texture sub-image.

Syntax

void gl.copyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);

Parameters

target
A GLenum specifying the binding point (target) of the active texture. Possible values:
  • gl.TEXTURE_2D: A two-dimensional texture.
  • gl.TEXTURE_CUBE_MAP_POSITIVE_X: Positive X face for a cube-mapped texture.
  • gl.TEXTURE_CUBE_MAP_NEGATIVE_X: Negative X face for a cube-mapped texture.
  • gl.TEXTURE_CUBE_MAP_POSITIVE_Y: Positive Y face for a cube-mapped texture.
  • gl.TEXTURE_CUBE_MAP_NEGATIVE_Y: Negative Y face for a cube-mapped texture.
  • gl.TEXTURE_CUBE_MAP_POSITIVE_Z: Positive Z face for a cube-mapped texture.
  • gl.TEXTURE_CUBE_MAP_NEGATIVE_Z: Negative Z face for a cube-mapped texture.
level
A GLint specifying the level of detail. Level 0 is the base image level and level n is the nth mipmap reduction level.
xoffset
A GLint specifying the horizontal offset within the texture image.
yoffset
A GLint specifying the vertical offset within the texture image.
x
A GLint specifying the x coordinate of the lower left corner where to start copying.
y
A GLint specifying the y coordinate of the lower left corner where to start copying.
width
A GLsizei specifying the width of the texture.
height
A GLsizei specifying the height of the texture.

Return value

None.

Examples

gl.copyTexSubImage2D(gl.TEXTURE_2D, 0, 0,0, 0, 0, 16, 16);

Specifications

Specification
WebGL Specification (WebGL)
# 5.14.8

Browser compatibility

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See also