Struct GpuAlgebra 

pub struct GpuAlgebra;

Pure-Rust raster algebra executor.

Implementations

impl GpuAlgebra

pub fn execute( band_a: &[f32], band_b: Option<&[f32]>, op: AlgebraOp, nodata: Option<f32>, ) -> Result<Vec<f32>, GpuError>

Execute an algebra operation pixel-by-pixel (CPU fallback).

band_b is required for binary operations (Add, Subtract, Multiply, Divide, Min, Max). For unary operations it is ignored.

Errors

Returns GpuError::InvalidKernelParams if band_a is empty.

pub fn evaluate_expression( bands: &[&[f32]], expression: &BandExpression, nodata: Option<f32>, ) -> Result<Vec<f32>, GpuError>

Evaluate a multi-band expression for every pixel.

All bands in bands must have the same length. Pixels where any band holds the nodata value are written as nodata without evaluating the expression.

Errors

Returns GpuError::InvalidKernelParams if no bands are provided. Propagates any error from expression.evaluate.