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web api instance method

WebGLRenderingContext: copyTexImage2D() method

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The copyTexImage2D() method of the WebGLRenderingContext interface of the WebGL API copies pixels from the current WebGLFramebuffer into a 2D texture image.

Syntax

copyTexImage2D(target, level, internalformat, x, y, width, height, border)

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 n-th mipmap reduction level.
  • internalformat
    • : A GLenum specifying how the texture should be stored after it’s loaded. Possible values:
      • gl.ALPHA: Discards the red, green and blue components and reads the alpha component.
      • gl.RGB: Discards the alpha components and reads the red, green and blue components.
      • gl.RGBA: Red, green, blue and alpha components are read from the color buffer.
      • gl.LUMINANCE: Each color component is a luminance component, alpha is 1.0.
      • gl.LUMINANCE_ALPHA: Each component is a luminance/alpha component.
  • 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 in texels.
  • height
    • : A GLsizei specifying the height of the texture in texels.
  • border
    • : A GLint specifying the width of the border. Must be 0.

Return value

None (undefined).

Examples

gl.copyTexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 0, 0, 512, 512, 0);

Specifications

SpecificationsStandards references are available on the canonical MDN page.

Browser compatibility

Browser compatibilityCompatibility data is available on the canonical MDN page.

See also