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texel / texelFetch
A texel is one pixel of a texture; texelFetch grabs exactly that pixel with no smoothing.
A texture is an image made of texels (texture elements). Normal texture reads blend neighbouring texels for smooth results, but texelFetch reads a single texel at exact integer coordinates, bypassing all filtering. That is what you want when a texture holds precise data rather than a smoothable picture.
See also
- texture samplingReading a smoothly-interpolated colour from a texture image inside a shader.
- texel bufferA plain memory buffer that a shader can read as if it were a one-dimensional texture.
- storage imageAn image that shaders can both read from and write to directly, like a 2D array in memory.
Referenced by
storage image · subgroup quad · swizzle · texel buffer · texture sampling