From OpenGL Reference
Jump to navigation Jump to search

Load a single texel from an image.


gvec4 imageLoad( gimage1D image, int P );
gvec4 imageLoad( gimage2D image, ivec2 P );
gvec4 imageLoad( gimage3D image, ivec3 P );
gvec4 imageLoad( gimage2DRect image, ivec2 P );
gvec4 imageLoad( gimageCube image, ivec3 P );
gvec4 imageLoad( gimageBuffer image, int P );
gvec4 imageLoad( gimage1DArray image, ivec2 P );
gvec4 imageLoad( gimage2DArray image, ivec3 P );
gvec4 imageLoad( gimageCubeArray image, ivec3 P );
gvec4 imageLoad( gimage2DMS image, ivec2 P, int sample );
gvec4 imageLoad( gimage2DMSArray image, ivec3 P, int sample );


image - Specify the image unit from which to load a texel.
P - Specify the coordinate from which to load the texel.
sample - When present, specifies the sample within the image to load


 imageLoad loads the texel at the coordinate P from the image unit image . For multi-sample loads, the sample number is given by sample . When image , P , sample identify a valid texel, the bits used to represent the selected texel in memory are converted to a vec4, ivec4, or uvec4 in the manner described in the OpenGL Specification and returned.

Version Support[edit]

imageLoad 4.2+

See Also[edit]

 imageStore , imageAtomicAdd , imageAtomicMin , imageAtomicMax , imageAtomicAnd , imageAtomicOr , imageAtomicXor , imageAtomicExchange , imageAtomicCompSwap 


Copyright© 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999.