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/operators/src/processing/raster_scaling.rs

use crate::engine::{
    CanonicOperatorName, ExecutionContext, InitializedRasterOperator, InitializedSources, Operator,
    OperatorName, RasterOperator, RasterQueryProcessor, RasterResultDescriptor, SingleRasterSource,
    TypedRasterQueryProcessor, WorkflowOperatorPath,
};
use crate::util::Result;
use async_trait::async_trait;
use futures::{StreamExt, TryStreamExt};

use geoengine_datatypes::raster::{
    CheckedMulThenAddTransformation, CheckedSubThenDivTransformation, ElementScaling,
    ScalingTransformation,
};
use geoengine_datatypes::{
    primitives::Measurement,
    raster::{Pixel, RasterPropertiesKey, RasterTile2D},
};
use num::FromPrimitive;
use num_traits::AsPrimitive;
use rayon::ThreadPool;
use serde::{Deserialize, Serialize};
use std::marker::PhantomData;
use std::sync::Arc;

#[derive(Debug, Serialize, Deserialize, Clone)]
#[serde(rename_all = "camelCase")]
pub struct RasterScalingParams {
    slope: SlopeOffsetSelection,
    offset: SlopeOffsetSelection,
    output_measurement: Option<Measurement>,
    scaling_mode: ScalingMode,
}

#[derive(Debug, Serialize, Deserialize, Clone, Copy)]
#[serde(rename_all = "camelCase")]
pub enum ScalingMode {
    MulSlopeAddOffset,
    SubOffsetDivSlope,
}

#[derive(Debug, Serialize, Deserialize, Clone)]
#[serde(rename_all = "camelCase", tag = "type")]
enum SlopeOffsetSelection {
    Auto,
    MetadataKey(RasterPropertiesKey),
    Constant { value: f64 },
}

impl Default for SlopeOffsetSelection {
    fn default() -> Self {
        Self::Auto
    }
}

/// The raster scaling operator scales/unscales the values of a raster by a given scale factor and offset.
/// This is done by applying the following formulas to every pixel.
/// For unscaling the formula is:
///
/// `p_new = p_old * slope + offset`
///
/// For scaling the formula is:
///
/// `p_new = (p_old - offset) / slope`
///
/// `p_old` and `p_new` refer to the old and new pixel values,
/// The slope and offset values are either properties attached to the input raster or a fixed value.
///
/// An example for Meteosat Second Generation properties is:
///
/// - offset: `msg.calibration_offset`
/// - slope: `msg.calibration_slope`
pub type RasterScaling = Operator<RasterScalingParams, SingleRasterSource>;

impl OperatorName for RasterScaling {
    const TYPE_NAME: &'static str = "RasterScaling";
}

pub struct InitializedRasterScalingOperator {
    name: CanonicOperatorName,
    slope: SlopeOffsetSelection,
    offset: SlopeOffsetSelection,
    result_descriptor: RasterResultDescriptor,
    source: Box<dyn InitializedRasterOperator>,
    scaling_mode: ScalingMode,
}

#[typetag::serde]
#[async_trait]
impl RasterOperator for RasterScaling {
    async fn _initialize(
        self: Box<Self>,
        path: WorkflowOperatorPath,
        context: &dyn ExecutionContext,
    ) -> Result<Box<dyn InitializedRasterOperator>> {
        let name = CanonicOperatorName::from(&self);

        let input = self.sources.initialize_sources(path, context).await?;
        let in_desc = input.raster.result_descriptor();

        let out_desc = RasterResultDescriptor {
            spatial_reference: in_desc.spatial_reference,
            data_type: in_desc.data_type,
            measurement: self
                .params
                .output_measurement
                .unwrap_or_else(|| in_desc.measurement.clone()),
            bbox: in_desc.bbox,
            time: in_desc.time,
            resolution: in_desc.resolution,
        };

        let initialized_operator = InitializedRasterScalingOperator {
            name,
            slope: self.params.slope,
            offset: self.params.offset,
            result_descriptor: out_desc,
            source: input.raster,
            scaling_mode: self.params.scaling_mode,
        };

        Ok(initialized_operator.boxed())
    }

    span_fn!(RasterScaling);
}

impl InitializedRasterOperator for InitializedRasterScalingOperator {
    fn result_descriptor(&self) -> &RasterResultDescriptor {
        &self.result_descriptor
    }

    fn query_processor(&self) -> Result<TypedRasterQueryProcessor> {
        let slope = self.slope.clone();
        let offset = self.offset.clone();
        let source = self.source.query_processor()?;
        let scaling_mode = self.scaling_mode;

        let res = match scaling_mode {
            ScalingMode::SubOffsetDivSlope => {
                call_on_generic_raster_processor!(source, source_proc => { TypedRasterQueryProcessor::from(create_boxed_processor::<_,_, CheckedSubThenDivTransformation>(slope, offset,  source_proc)) })
            }
            ScalingMode::MulSlopeAddOffset => {
                call_on_generic_raster_processor!(source, source_proc => { TypedRasterQueryProcessor::from(create_boxed_processor::<_,_, CheckedMulThenAddTransformation>(slope, offset,  source_proc)) })
            }
        };

        Ok(res)
    }

    fn canonic_name(&self) -> CanonicOperatorName {
        self.name.clone()
    }
}

struct RasterTransformationProcessor<Q, P, S>
where
    Q: RasterQueryProcessor<RasterType = P>,
{
    source: Q,
    slope: SlopeOffsetSelection,
    offset: SlopeOffsetSelection,
    _transformation: PhantomData<S>,
}

fn create_boxed_processor<Q, P, S>(
    slope: SlopeOffsetSelection,
    offset: SlopeOffsetSelection,
    source: Q,
) -> Box<dyn RasterQueryProcessor<RasterType = P>>
where
    Q: RasterQueryProcessor<RasterType = P> + 'static,
    P: Pixel + FromPrimitive + 'static + Default,
    f64: AsPrimitive<P>,
    S: Send + Sync + 'static + ScalingTransformation<P>,
{
    RasterTransformationProcessor::<Q, P, S>::create(slope, offset, source).boxed()
}

impl<Q, P, S> RasterTransformationProcessor<Q, P, S>
where
    Q: RasterQueryProcessor<RasterType = P> + 'static,
    P: Pixel + FromPrimitive + 'static + Default,
    f64: AsPrimitive<P>,
    S: Send + Sync + 'static + ScalingTransformation<P>,
{
    pub fn create(
        slope: SlopeOffsetSelection,
        offset: SlopeOffsetSelection,
        source: Q,
    ) -> RasterTransformationProcessor<Q, P, S> {
        RasterTransformationProcessor {
            source,
            slope,
            offset,
            _transformation: PhantomData,
        }
    }

    async fn scale_tile_async(
        &self,
        tile: RasterTile2D<P>,
        _pool: Arc<ThreadPool>,
    ) -> Result<RasterTile2D<P>> {
        // either use the provided metadata/constant or the default values from the properties
        let offset = match &self.offset {
            SlopeOffsetSelection::MetadataKey(key) => tile.properties.number_property::<P>(key)?,
            SlopeOffsetSelection::Constant { value } => value.as_(),
            SlopeOffsetSelection::Auto => tile.properties.offset().as_(),
        };

        let slope = match &self.slope {
            SlopeOffsetSelection::MetadataKey(key) => tile.properties.number_property::<P>(key)?,
            SlopeOffsetSelection::Constant { value } => value.as_(),
            SlopeOffsetSelection::Auto => tile.properties.scale().as_(),
        };

        let res_tile =
            crate::util::spawn_blocking(move || tile.transform_elements::<S>(slope, offset))
                .await?;

        Ok(res_tile)
    }
}

#[async_trait]
impl<Q, P, S> RasterQueryProcessor for RasterTransformationProcessor<Q, P, S>
where
    P: Pixel + FromPrimitive + 'static + Default,
    f64: AsPrimitive<P>,
    Q: RasterQueryProcessor<RasterType = P> + 'static,
    S: Send + Sync + 'static + ScalingTransformation<P>,
{
    type RasterType = P;

    async fn raster_query<'a>(
        &'a self,
        query: geoengine_datatypes::primitives::RasterQueryRectangle,
        ctx: &'a dyn crate::engine::QueryContext,
    ) -> Result<
        futures::stream::BoxStream<
            'a,
            Result<geoengine_datatypes::raster::RasterTile2D<Self::RasterType>>,
        >,
    > {
        let src = self.source.raster_query(query, ctx).await?;
        let rs = src.and_then(move |tile| self.scale_tile_async(tile, ctx.thread_pool().clone()));
        Ok(rs.boxed())
    }
}

#[cfg(test)]
mod tests {

    use geoengine_datatypes::{
        primitives::{SpatialPartition2D, SpatialResolution, TimeInterval},
        raster::{
            Grid2D, GridOrEmpty2D, GridShape, MaskedGrid2D, RasterDataType, RasterProperties,
            TileInformation, TilingSpecification,
        },
        spatial_reference::SpatialReference,
        util::test::TestDefault,
    };

    use crate::{
        engine::{ChunkByteSize, MockExecutionContext},
        mock::{MockRasterSource, MockRasterSourceParams},
    };

    use super::*;

    #[tokio::test]
    async fn test_unscale() {
        let grid_shape = [2, 2].into();

        let tiling_specification = TilingSpecification {
            origin_coordinate: [0.0, 0.0].into(),
            tile_size_in_pixels: grid_shape,
        };

        let raster = MaskedGrid2D::from(Grid2D::new(grid_shape, vec![7_u8, 7, 7, 6]).unwrap());

        let ctx = MockExecutionContext::new_with_tiling_spec(tiling_specification);
        let query_ctx = ctx.mock_query_context(ChunkByteSize::test_default());

        let mut raster_props = RasterProperties::default();
        raster_props.set_scale(2.0);
        raster_props.set_offset(1.0);

        let raster_tile = RasterTile2D::new_with_tile_info_and_properties(
            TimeInterval::default(),
            TileInformation {
                global_geo_transform: TestDefault::test_default(),
                global_tile_position: [0, 0].into(),
                tile_size_in_pixels: grid_shape,
            },
            raster.into(),
            raster_props,
        );

        let spatial_resolution = raster_tile.spatial_resolution();

        let mrs = MockRasterSource {
            params: MockRasterSourceParams {
                data: vec![raster_tile],
                result_descriptor: RasterResultDescriptor {
                    data_type: RasterDataType::U8,
                    spatial_reference: SpatialReference::epsg_4326().into(),
                    measurement: Measurement::Unitless,
                    bbox: None,
                    time: None,
                    resolution: Some(spatial_resolution),
                },
            },
        }
        .boxed();

        let scaling_mode = ScalingMode::MulSlopeAddOffset;

        let output_measurement = None;

        let op = RasterScaling {
            params: RasterScalingParams {
                slope: SlopeOffsetSelection::Auto,
                offset: SlopeOffsetSelection::Auto,
                output_measurement,
                scaling_mode,
            },
            sources: SingleRasterSource { raster: mrs },
        }
        .boxed();

        let initialized_op = op
            .initialize(WorkflowOperatorPath::initialize_root(), &ctx)
            .await
            .unwrap();

        let result_descriptor = initialized_op.result_descriptor();

        assert_eq!(result_descriptor.data_type, RasterDataType::U8);
        assert_eq!(result_descriptor.measurement, Measurement::Unitless);

        let query_processor = initialized_op.query_processor().unwrap();

        let query = geoengine_datatypes::primitives::RasterQueryRectangle {
            spatial_bounds: SpatialPartition2D::new((0., 0.).into(), (2., -2.).into()).unwrap(),
            spatial_resolution: SpatialResolution::one(),
            time_interval: TimeInterval::default(),
        };

        let TypedRasterQueryProcessor::U8(typed_processor) = query_processor else {
            panic!("expected TypedRasterQueryProcessor::U8");
        };

        let stream = typed_processor
            .raster_query(query, &query_ctx)
            .await
            .unwrap();

        let results = stream.collect::<Vec<Result<RasterTile2D<u8>>>>().await;

        let result_tile = results.as_slice()[0].as_ref().unwrap();

        let result_grid = result_tile.grid_array.clone();

        match result_grid {
            GridOrEmpty2D::Grid(grid) => {
                assert_eq!(grid.shape(), &GridShape::new([2, 2]));

                let res = grid.masked_element_deref_iterator().collect::<Vec<_>>();

                let expected = vec![Some(15), Some(15), Some(15), Some(13)];

                assert_eq!(res, expected);
            }
            GridOrEmpty2D::Empty(_) => panic!("expected GridOrEmpty2D::Grid"),
        }
    }

    #[tokio::test]
    async fn test_scale() {
        let grid_shape = [2, 2].into();

        let tiling_specification = TilingSpecification {
            origin_coordinate: [0.0, 0.0].into(),
            tile_size_in_pixels: grid_shape,
        };

        let raster = MaskedGrid2D::from(Grid2D::new(grid_shape, vec![15_u8, 15, 15, 13]).unwrap());

        let ctx = MockExecutionContext::new_with_tiling_spec(tiling_specification);
        let query_ctx = ctx.mock_query_context(ChunkByteSize::test_default());

        let mut raster_props = RasterProperties::default();
        raster_props.set_scale(2.0);
        raster_props.set_offset(1.0);

        let raster_tile = RasterTile2D::new_with_tile_info_and_properties(
            TimeInterval::default(),
            TileInformation {
                global_geo_transform: TestDefault::test_default(),
                global_tile_position: [0, 0].into(),
                tile_size_in_pixels: grid_shape,
            },
            raster.into(),
            raster_props,
        );

        let spatial_resolution = raster_tile.spatial_resolution();

        let mrs = MockRasterSource {
            params: MockRasterSourceParams {
                data: vec![raster_tile],
                result_descriptor: RasterResultDescriptor {
                    data_type: RasterDataType::U8,
                    spatial_reference: SpatialReference::epsg_4326().into(),
                    measurement: Measurement::Unitless,
                    bbox: None,
                    time: None,
                    resolution: Some(spatial_resolution),
                },
            },
        }
        .boxed();

        let scaling_mode = ScalingMode::SubOffsetDivSlope;

        let output_measurement = None;

        let params = RasterScalingParams {
            slope: SlopeOffsetSelection::Auto,
            offset: SlopeOffsetSelection::Auto,
            output_measurement,
            scaling_mode,
        };

        let op = RasterScaling {
            params,
            sources: SingleRasterSource { raster: mrs },
        }
        .boxed();

        let initialized_op = op
            .initialize(WorkflowOperatorPath::initialize_root(), &ctx)
            .await
            .unwrap();

        let result_descriptor = initialized_op.result_descriptor();

        assert_eq!(result_descriptor.data_type, RasterDataType::U8);
        assert_eq!(result_descriptor.measurement, Measurement::Unitless);

        let query_processor = initialized_op.query_processor().unwrap();

        let query = geoengine_datatypes::primitives::RasterQueryRectangle {
            spatial_bounds: SpatialPartition2D::new((0., 0.).into(), (2., -2.).into()).unwrap(),
            spatial_resolution: SpatialResolution::one(),
            time_interval: TimeInterval::default(),
        };

        let TypedRasterQueryProcessor::U8(typed_processor) = query_processor else {
            panic!("expected TypedRasterQueryProcessor::U8");
        };

        let stream = typed_processor
            .raster_query(query, &query_ctx)
            .await
            .unwrap();

        let results = stream.collect::<Vec<Result<RasterTile2D<u8>>>>().await;

        let result_tile = results.as_slice()[0].as_ref().unwrap();

        let result_grid = result_tile.grid_array.clone();

        match result_grid {
            GridOrEmpty2D::Grid(grid) => {
                assert_eq!(grid.shape(), &GridShape::new([2, 2]));

                let res = grid.masked_element_deref_iterator().collect::<Vec<_>>();

                let expected = vec![Some(7), Some(7), Some(7), Some(6)];

                assert_eq!(res, expected);
            }
            GridOrEmpty2D::Empty(_) => panic!("expected GridOrEmpty2D::Grid"),
        }
    }
}

1	use crate::engine::{
2	CanonicOperatorName, ExecutionContext, InitializedRasterOperator, InitializedSources, Operator,
3	OperatorName, RasterOperator, RasterQueryProcessor, RasterResultDescriptor, SingleRasterSource,
4	TypedRasterQueryProcessor, WorkflowOperatorPath,
5	};
6	use crate::util::Result;
7	use async_trait::async_trait;
8	use futures::{StreamExt, TryStreamExt};
9
10	use geoengine_datatypes::raster::{
11	CheckedMulThenAddTransformation, CheckedSubThenDivTransformation, ElementScaling,
12	ScalingTransformation,
13	};
14	use geoengine_datatypes::{
15	primitives::Measurement,
16	raster::{Pixel, RasterPropertiesKey, RasterTile2D},
17	};
18	use num::FromPrimitive;
19	use num_traits::AsPrimitive;
20	use rayon::ThreadPool;
21	use serde::{Deserialize, Serialize};
22	use std::marker::PhantomData;
23	use std::sync::Arc;
24
25	#[derive(Debug, Serialize, Deserialize, Clone)]	2✔
26	#[serde(rename_all = "camelCase")]
27	pub struct RasterScalingParams {
28	slope: SlopeOffsetSelection,
29	offset: SlopeOffsetSelection,
30	output_measurement: Option<Measurement>,
31	scaling_mode: ScalingMode,
32	}
33
34	#[derive(Debug, Serialize, Deserialize, Clone, Copy)]	2✔
35	#[serde(rename_all = "camelCase")]
36	pub enum ScalingMode {
37	MulSlopeAddOffset,
38	SubOffsetDivSlope,
39	}
40
41	#[derive(Debug, Serialize, Deserialize, Clone)]	4✔
42	#[serde(rename_all = "camelCase", tag = "type")]
43	enum SlopeOffsetSelection {
44	Auto,
45	MetadataKey(RasterPropertiesKey),
46	Constant { value: f64 },
47	}
48
49	impl Default for SlopeOffsetSelection {
50	fn default() -> Self {	×
51	Self::Auto	×
52	}	×
53	}
54
55	/// The raster scaling operator scales/unscales the values of a raster by a given scale factor and offset.
56	/// This is done by applying the following formulas to every pixel.
57	/// For unscaling the formula is:
58	///
59	/// `p_new = p_old * slope + offset`
60	///
61	/// For scaling the formula is:
62	///
63	/// `p_new = (p_old - offset) / slope`
64	///
65	/// `p_old` and `p_new` refer to the old and new pixel values,
66	/// The slope and offset values are either properties attached to the input raster or a fixed value.
67	///
68	/// An example for Meteosat Second Generation properties is:
69	///
70	/// - offset: `msg.calibration_offset`
71	/// - slope: `msg.calibration_slope`
72	pub type RasterScaling = Operator<RasterScalingParams, SingleRasterSource>;
73
74	impl OperatorName for RasterScaling {
75	const TYPE_NAME: &'static str = "RasterScaling";
76	}
77
78	pub struct InitializedRasterScalingOperator {
79	name: CanonicOperatorName,
80	slope: SlopeOffsetSelection,
81	offset: SlopeOffsetSelection,
82	result_descriptor: RasterResultDescriptor,
83	source: Box<dyn InitializedRasterOperator>,
84	scaling_mode: ScalingMode,
85	}
86
87	#[typetag::serde]	×
88	#[async_trait]
89	impl RasterOperator for RasterScaling {
90	async fn _initialize(	2✔
91	self: Box<Self>,	2✔
92	path: WorkflowOperatorPath,	2✔
93	context: &dyn ExecutionContext,	2✔
94	) -> Result<Box<dyn InitializedRasterOperator>> {	2✔
95	let name = CanonicOperatorName::from(&self);	2✔
96
97	let input = self.sources.initialize_sources(path, context).await?;	2✔
98	let in_desc = input.raster.result_descriptor();	2✔
99		2✔
100	let out_desc = RasterResultDescriptor {	2✔
101	spatial_reference: in_desc.spatial_reference,	2✔
102	data_type: in_desc.data_type,	2✔
103	measurement: self	2✔
104	.params	2✔
105	.output_measurement	2✔
106	.unwrap_or_else(\|\| in_desc.measurement.clone()),	2✔
107	bbox: in_desc.bbox,	2✔
108	time: in_desc.time,	2✔
109	resolution: in_desc.resolution,	2✔
110	};	2✔
111		2✔
112	let initialized_operator = InitializedRasterScalingOperator {	2✔
113	name,	2✔
114	slope: self.params.slope,	2✔
115	offset: self.params.offset,	2✔
116	result_descriptor: out_desc,	2✔
117	source: input.raster,	2✔
118	scaling_mode: self.params.scaling_mode,	2✔
119	};	2✔
120		2✔
121	Ok(initialized_operator.boxed())	2✔
122	}	4✔
123
124	span_fn!(RasterScaling);	×
125	}
126
127	impl InitializedRasterOperator for InitializedRasterScalingOperator {
128	fn result_descriptor(&self) -> &RasterResultDescriptor {	2✔
129	&self.result_descriptor	2✔
130	}	2✔
131
132	fn query_processor(&self) -> Result<TypedRasterQueryProcessor> {	2✔
133	let slope = self.slope.clone();	2✔
134	let offset = self.offset.clone();	2✔
135	let source = self.source.query_processor()?;	2✔
136	let scaling_mode = self.scaling_mode;	2✔
137
138	let res = match scaling_mode {	2✔
139	ScalingMode::SubOffsetDivSlope => {
140	call_on_generic_raster_processor!(source, source_proc => { TypedRasterQueryProcessor::from(create_boxed_processor::<_,_, CheckedSubThenDivTransformation>(slope, offset, source_proc)) })	1✔
141	}
142	ScalingMode::MulSlopeAddOffset => {
143	call_on_generic_raster_processor!(source, source_proc => { TypedRasterQueryProcessor::from(create_boxed_processor::<_,_, CheckedMulThenAddTransformation>(slope, offset, source_proc)) })	1✔
144	}
145	};
146
147	Ok(res)	2✔
148	}	2✔
149
150	fn canonic_name(&self) -> CanonicOperatorName {	×
151	self.name.clone()	×
152	}	×
153	}
154
155	struct RasterTransformationProcessor<Q, P, S>
156	where
157	Q: RasterQueryProcessor<RasterType = P>,
158	{
159	source: Q,
160	slope: SlopeOffsetSelection,
161	offset: SlopeOffsetSelection,
162	_transformation: PhantomData<S>,
163	}
164
165	fn create_boxed_processor<Q, P, S>(	2✔
166	slope: SlopeOffsetSelection,	2✔
167	offset: SlopeOffsetSelection,	2✔
168	source: Q,	2✔
169	) -> Box<dyn RasterQueryProcessor<RasterType = P>>	2✔
170	where	2✔
171	Q: RasterQueryProcessor<RasterType = P> + 'static,	2✔
172	P: Pixel + FromPrimitive + 'static + Default,	2✔
173	f64: AsPrimitive<P>,	2✔
174	S: Send + Sync + 'static + ScalingTransformation<P>,	2✔
175	{	2✔
176	RasterTransformationProcessor::<Q, P, S>::create(slope, offset, source).boxed()	2✔
177	}	2✔
178
179	impl<Q, P, S> RasterTransformationProcessor<Q, P, S>
180	where
181	Q: RasterQueryProcessor<RasterType = P> + 'static,
182	P: Pixel + FromPrimitive + 'static + Default,
183	f64: AsPrimitive<P>,
184	S: Send + Sync + 'static + ScalingTransformation<P>,
185	{
186	pub fn create(	2✔
187	slope: SlopeOffsetSelection,	2✔
188	offset: SlopeOffsetSelection,	2✔
189	source: Q,	2✔
190	) -> RasterTransformationProcessor<Q, P, S> {	2✔
191	RasterTransformationProcessor {	2✔
192	source,	2✔
193	slope,	2✔
194	offset,	2✔
195	_transformation: PhantomData,	2✔
196	}	2✔
197	}	2✔
198
199	async fn scale_tile_async(	2✔
200	&self,	2✔
201	tile: RasterTile2D<P>,	2✔
202	_pool: Arc<ThreadPool>,	2✔
203	) -> Result<RasterTile2D<P>> {	2✔
204	// either use the provided metadata/constant or the default values from the properties
205	let offset = match &self.offset {	2✔
206	SlopeOffsetSelection::MetadataKey(key) => tile.properties.number_property::<P>(key)?,	×
207	SlopeOffsetSelection::Constant { value } => value.as_(),	×
208	SlopeOffsetSelection::Auto => tile.properties.offset().as_(),	2✔
209	};
210
211	let slope = match &self.slope {	2✔
212	SlopeOffsetSelection::MetadataKey(key) => tile.properties.number_property::<P>(key)?,	×
213	SlopeOffsetSelection::Constant { value } => value.as_(),	×
214	SlopeOffsetSelection::Auto => tile.properties.scale().as_(),	2✔
215	};
216
217	let res_tile =	2✔
218	crate::util::spawn_blocking(move \|\| tile.transform_elements::<S>(slope, offset))	2✔
219	.await?;	2✔
220
221	Ok(res_tile)	2✔
222	}	2✔
223	}
224
225	#[async_trait]
226	impl<Q, P, S> RasterQueryProcessor for RasterTransformationProcessor<Q, P, S>
227	where
228	P: Pixel + FromPrimitive + 'static + Default,
229	f64: AsPrimitive<P>,
230	Q: RasterQueryProcessor<RasterType = P> + 'static,
231	S: Send + Sync + 'static + ScalingTransformation<P>,
232	{
233	type RasterType = P;
234
235	async fn raster_query<'a>(	2✔
236	&'a self,	2✔
237	query: geoengine_datatypes::primitives::RasterQueryRectangle,	2✔
238	ctx: &'a dyn crate::engine::QueryContext,	2✔
239	) -> Result<	2✔
240	futures::stream::BoxStream<	2✔
241	'a,	2✔
242	Result<geoengine_datatypes::raster::RasterTile2D<Self::RasterType>>,	2✔
243	>,	2✔
244	> {	2✔
245	let src = self.source.raster_query(query, ctx).await?;	2✔
246	let rs = src.and_then(move \|tile\| self.scale_tile_async(tile, ctx.thread_pool().clone()));	2✔
247	Ok(rs.boxed())	2✔
248	}	4✔
249	}
250
251	#[cfg(test)]
252	mod tests {
253
254	use geoengine_datatypes::{
255	primitives::{SpatialPartition2D, SpatialResolution, TimeInterval},
256	raster::{
257	Grid2D, GridOrEmpty2D, GridShape, MaskedGrid2D, RasterDataType, RasterProperties,
258	TileInformation, TilingSpecification,
259	},
260	spatial_reference::SpatialReference,
261	util::test::TestDefault,
262	};
263
264	use crate::{
265	engine::{ChunkByteSize, MockExecutionContext},
266	mock::{MockRasterSource, MockRasterSourceParams},
267	};
268
269	use super::*;
270
271	#[tokio::test]	1✔
272	async fn test_unscale() {	1✔
273	let grid_shape = [2, 2].into();	1✔
274		1✔
275	let tiling_specification = TilingSpecification {	1✔
276	origin_coordinate: [0.0, 0.0].into(),	1✔
277	tile_size_in_pixels: grid_shape,	1✔
278	};	1✔
279		1✔
280	let raster = MaskedGrid2D::from(Grid2D::new(grid_shape, vec![7_u8, 7, 7, 6]).unwrap());	1✔
281		1✔
282	let ctx = MockExecutionContext::new_with_tiling_spec(tiling_specification);	1✔
283	let query_ctx = ctx.mock_query_context(ChunkByteSize::test_default());	1✔
284		1✔
285	let mut raster_props = RasterProperties::default();	1✔
286	raster_props.set_scale(2.0);	1✔
287	raster_props.set_offset(1.0);	1✔
288		1✔
289	let raster_tile = RasterTile2D::new_with_tile_info_and_properties(	1✔
290	TimeInterval::default(),	1✔
291	TileInformation {	1✔
292	global_geo_transform: TestDefault::test_default(),	1✔
293	global_tile_position: [0, 0].into(),	1✔
294	tile_size_in_pixels: grid_shape,	1✔
295	},	1✔
296	raster.into(),	1✔
297	raster_props,	1✔
298	);	1✔
299		1✔
300	let spatial_resolution = raster_tile.spatial_resolution();	1✔
301		1✔
302	let mrs = MockRasterSource {	1✔
303	params: MockRasterSourceParams {	1✔
304	data: vec![raster_tile],	1✔
305	result_descriptor: RasterResultDescriptor {	1✔
306	data_type: RasterDataType::U8,	1✔
307	spatial_reference: SpatialReference::epsg_4326().into(),	1✔
308	measurement: Measurement::Unitless,	1✔
309	bbox: None,	1✔
310	time: None,	1✔
311	resolution: Some(spatial_resolution),	1✔
312	},	1✔
313	},	1✔
314	}	1✔
315	.boxed();	1✔
316		1✔
317	let scaling_mode = ScalingMode::MulSlopeAddOffset;	1✔
318		1✔
319	let output_measurement = None;	1✔
320		1✔
321	let op = RasterScaling {	1✔
322	params: RasterScalingParams {	1✔
323	slope: SlopeOffsetSelection::Auto,	1✔
324	offset: SlopeOffsetSelection::Auto,	1✔
325	output_measurement,	1✔
326	scaling_mode,	1✔
327	},	1✔
328	sources: SingleRasterSource { raster: mrs },	1✔
329	}	1✔
330	.boxed();	1✔
331
332	let initialized_op = op	1✔
333	.initialize(WorkflowOperatorPath::initialize_root(), &ctx)	1✔
334	.await	×
335	.unwrap();	1✔
336		1✔
337	let result_descriptor = initialized_op.result_descriptor();	1✔
338		1✔
339	assert_eq!(result_descriptor.data_type, RasterDataType::U8);	1✔
340	assert_eq!(result_descriptor.measurement, Measurement::Unitless);	1✔
341
342	let query_processor = initialized_op.query_processor().unwrap();	1✔
343		1✔
344	let query = geoengine_datatypes::primitives::RasterQueryRectangle {	1✔
345	spatial_bounds: SpatialPartition2D::new((0., 0.).into(), (2., -2.).into()).unwrap(),	1✔
346	spatial_resolution: SpatialResolution::one(),	1✔
347	time_interval: TimeInterval::default(),	1✔
348	};	1✔
349
350	let TypedRasterQueryProcessor::U8(typed_processor) = query_processor else {	1✔
351	panic!("expected TypedRasterQueryProcessor::U8");	×
352	};
353
354	let stream = typed_processor	1✔
355	.raster_query(query, &query_ctx)	1✔
356	.await	×
357	.unwrap();	1✔
358
359	let results = stream.collect::<Vec<Result<RasterTile2D<u8>>>>().await;	1✔
360
361	let result_tile = results.as_slice()[0].as_ref().unwrap();	1✔
362		1✔
363	let result_grid = result_tile.grid_array.clone();	1✔
364		1✔
365	match result_grid {	1✔
366	GridOrEmpty2D::Grid(grid) => {	1✔
367	assert_eq!(grid.shape(), &GridShape::new([2, 2]));	1✔
368
369	let res = grid.masked_element_deref_iterator().collect::<Vec<_>>();	1✔
370		1✔
371	let expected = vec![Some(15), Some(15), Some(15), Some(13)];	1✔
372		1✔
373	assert_eq!(res, expected);	1✔
374	}
375	GridOrEmpty2D::Empty(_) => panic!("expected GridOrEmpty2D::Grid"),	×
376	}
377	}
378
379	#[tokio::test]	1✔
380	async fn test_scale() {	1✔
381	let grid_shape = [2, 2].into();	1✔
382		1✔
383	let tiling_specification = TilingSpecification {	1✔
384	origin_coordinate: [0.0, 0.0].into(),	1✔
385	tile_size_in_pixels: grid_shape,	1✔
386	};	1✔
387		1✔
388	let raster = MaskedGrid2D::from(Grid2D::new(grid_shape, vec![15_u8, 15, 15, 13]).unwrap());	1✔
389		1✔
390	let ctx = MockExecutionContext::new_with_tiling_spec(tiling_specification);	1✔
391	let query_ctx = ctx.mock_query_context(ChunkByteSize::test_default());	1✔
392		1✔
393	let mut raster_props = RasterProperties::default();	1✔
394	raster_props.set_scale(2.0);	1✔
395	raster_props.set_offset(1.0);	1✔
396		1✔
397	let raster_tile = RasterTile2D::new_with_tile_info_and_properties(	1✔
398	TimeInterval::default(),	1✔
399	TileInformation {	1✔
400	global_geo_transform: TestDefault::test_default(),	1✔
401	global_tile_position: [0, 0].into(),	1✔
402	tile_size_in_pixels: grid_shape,	1✔
403	},	1✔
404	raster.into(),	1✔
405	raster_props,	1✔
406	);	1✔
407		1✔
408	let spatial_resolution = raster_tile.spatial_resolution();	1✔
409		1✔
410	let mrs = MockRasterSource {	1✔
411	params: MockRasterSourceParams {	1✔
412	data: vec![raster_tile],	1✔
413	result_descriptor: RasterResultDescriptor {	1✔
414	data_type: RasterDataType::U8,	1✔
415	spatial_reference: SpatialReference::epsg_4326().into(),	1✔
416	measurement: Measurement::Unitless,	1✔
417	bbox: None,	1✔
418	time: None,	1✔
419	resolution: Some(spatial_resolution),	1✔
420	},	1✔
421	},	1✔
422	}	1✔
423	.boxed();	1✔
424		1✔
425	let scaling_mode = ScalingMode::SubOffsetDivSlope;	1✔
426		1✔
427	let output_measurement = None;	1✔
428		1✔
429	let params = RasterScalingParams {	1✔
430	slope: SlopeOffsetSelection::Auto,	1✔
431	offset: SlopeOffsetSelection::Auto,	1✔
432	output_measurement,	1✔
433	scaling_mode,	1✔
434	};	1✔
435		1✔
436	let op = RasterScaling {	1✔
437	params,	1✔
438	sources: SingleRasterSource { raster: mrs },	1✔
439	}	1✔
440	.boxed();	1✔
441
442	let initialized_op = op	1✔
443	.initialize(WorkflowOperatorPath::initialize_root(), &ctx)	1✔
444	.await	×
445	.unwrap();	1✔
446		1✔
447	let result_descriptor = initialized_op.result_descriptor();	1✔
448		1✔
449	assert_eq!(result_descriptor.data_type, RasterDataType::U8);	1✔
450	assert_eq!(result_descriptor.measurement, Measurement::Unitless);	1✔
451
452	let query_processor = initialized_op.query_processor().unwrap();	1✔
453		1✔
454	let query = geoengine_datatypes::primitives::RasterQueryRectangle {	1✔
455	spatial_bounds: SpatialPartition2D::new((0., 0.).into(), (2., -2.).into()).unwrap(),	1✔
456	spatial_resolution: SpatialResolution::one(),	1✔
457	time_interval: TimeInterval::default(),	1✔
458	};	1✔
459
460	let TypedRasterQueryProcessor::U8(typed_processor) = query_processor else {	1✔
461	panic!("expected TypedRasterQueryProcessor::U8");	×
462	};
463
464	let stream = typed_processor	1✔
465	.raster_query(query, &query_ctx)	1✔
466	.await	×
467	.unwrap();	1✔
468
469	let results = stream.collect::<Vec<Result<RasterTile2D<u8>>>>().await;	1✔
470
471	let result_tile = results.as_slice()[0].as_ref().unwrap();	1✔
472		1✔
473	let result_grid = result_tile.grid_array.clone();	1✔
474		1✔
475	match result_grid {	1✔
476	GridOrEmpty2D::Grid(grid) => {	1✔
477	assert_eq!(grid.shape(), &GridShape::new([2, 2]));	1✔
478
479	let res = grid.masked_element_deref_iterator().collect::<Vec<_>>();	1✔
480		1✔
481	let expected = vec![Some(7), Some(7), Some(7), Some(6)];	1✔
482		1✔
483	assert_eq!(res, expected);	1✔
484	}
485	GridOrEmpty2D::Empty(_) => panic!("expected GridOrEmpty2D::Grid"),	×
486	}
487	}
488	}

geo-engine / geoengine / 5006008836

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