update-compressed-texture ( tdt level loc dim compressed-data -- )
GPU-accelerated rendering » Texture objects

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Vocabulary
gpu.textures

Inputs

tdt	a texture-data-target
level	an integer
loc	an integer or sequence of integers
dim	an integer or sequence of integers
compressed-data	a texture-data

Outputs
None

Word description
Updates the linear, rectangular, or cubic subregion of a compressed texture-data-target bounded by loc and dim with the data referenced by the given compressed-texture-data tuple. The given level of detail of the texture must have been previously allocated for compressed data with allocate-compressed-texture.

Notes
Using a buffer-ptr as the ptr of a compressed-texture-data object requires OpenGL 2.1 or later or the GL_ARB_pixel_buffer_object extension.

See also
update-texture, update-texture-image

Definition

IN: gpu.textures

GENERIC#: update-compressed-texture 4
    ( tdt level loc dim compressed-data -- )

Methods

USING: gpu.textures gpu.textures.private opengl.gl ;

M: texture-1d-data-target update-compressed-texture
    [ ] [ glCompressedTexSubImage1D ]
    (update-compressed-texture) ;


USING: gpu.textures gpu.textures.private opengl.gl sequences ;

M: texture-2d-data-target update-compressed-texture
    [ first2 ] [ glCompressedTexSubImage2D ]
    (update-compressed-texture) ;


USING: gpu.textures gpu.textures.private opengl.gl sequences ;

M: texture-3d-data-target update-compressed-texture
    [ first3 ] [ glCompressedTexSubImage3D ]
    (update-compressed-texture) ;