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export const description = `
Samples a depth texture and compares the sampled depth values against a reference value.
The textureSampleCompareLevel function is the same as textureSampleCompare, except that:
* textureSampleCompareLevel always samples texels from mip level 0.
* The function does not compute derivatives.
* There is no requirement for textureSampleCompareLevel to be invoked in uniform control flow.
* textureSampleCompareLevel may be invoked in any shader stage.
`;
import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
import { GPUTest } from '../../../../../gpu_test.js';
import { generateCoordBoundaries, generateOffsets } from './utils.js';
export const g = makeTestGroup(GPUTest);
g.test('stage')
.specURL('https://www.w3.org/TR/WGSL/#texturesamplecomparelevel')
.desc(
`
Tests that 'textureSampleCompareLevel' maybe called in any shader stage.
`
)
.params(u => u.combine('stage', ['fragment', 'vertex', 'compute'] as const))
.unimplemented();
g.test('control_flow')
.specURL('https://www.w3.org/TR/WGSL/#texturesamplecomparelevel')
.desc(
`
Tests that 'textureSampleCompareLevel' maybe called in non-uniform control flow.
`
)
.params(u => u.combine('stage', ['fragment', 'vertex', 'compute'] as const))
.unimplemented();
g.test('2d_coords')
.specURL('https://www.w3.org/TR/WGSL/#texturesamplecomparelevel')
.desc(
`
fn textureSampleCompareLevel(t: texture_depth_2d, s: sampler_comparison, coords: vec2<f32>, depth_ref: f32) -> f32
fn textureSampleCompareLevel(t: texture_depth_2d, s: sampler_comparison, coords: vec2<f32>, depth_ref: f32, offset: vec2<i32>) -> f32
Parameters:
* t The depth texture to sample.
* s The sampler_comparision type.
* coords The texture coordinates used for sampling.
* depth_ref The reference value to compare the sampled depth value against.
* offset
* The optional texel offset applied to the unnormalized texture coordinate before sampling the texture.
* This offset is applied before applying any texture wrapping modes.
* The offset expression must be a creation-time expression (e.g. vec2<i32>(1, 2)).
* Each offset component must be at least -8 and at most 7.
Values outside of this range will result in a shader-creation error.
`
)
.paramsSubcasesOnly(u =>
u
.combine('S', ['clamp-to-edge', 'repeat', 'mirror-repeat'])
.combine('coords', generateCoordBoundaries(2))
.combine('depth_ref', [-1 /* smaller ref */, 0 /* equal ref */, 1 /* larger ref */] as const)
.combine('offset', generateOffsets(2))
)
.unimplemented();
g.test('3d_coords')
.specURL('https://www.w3.org/TR/WGSL/#texturesamplecomparelevel')
.desc(
`
fn textureSampleCompareLevel(t: texture_depth_cube, s: sampler_comparison, coords: vec3<f32>, depth_ref: f32) -> f32
Parameters:
* t The depth texture to sample.
* s The sampler_comparision type.
* coords The texture coordinates used for sampling.
* depth_ref The reference value to compare the sampled depth value against.
`
)
.paramsSubcasesOnly(u =>
u
.combine('S', ['clamp-to-edge', 'repeat', 'mirror-repeat'])
.combine('coords', generateCoordBoundaries(3))
.combine('depth_ref', [-1 /* smaller ref */, 0 /* equal ref */, 1 /* larger ref */] as const)
)
.unimplemented();
g.test('arrayed_2d_coords')
.specURL('https://www.w3.org/TR/WGSL/#texturesamplecomparelevel')
.desc(
`
C is i32 or u32
fn textureSampleCompareLevel(t: texture_depth_2d_array, s: sampler_comparison, coords: vec2<f32>, array_index: C, depth_ref: f32) -> f32
fn textureSampleCompareLevel(t: texture_depth_2d_array, s: sampler_comparison, coords: vec2<f32>, array_index: C, depth_ref: f32, offset: vec2<i32>) -> f32
Parameters:
* t The depth texture to sample.
* s The sampler_comparision type.
* coords The texture coordinates used for sampling.
* array_index: The 0-based texture array index to sample.
* depth_ref The reference value to compare the sampled depth value against.
* offset
* The optional texel offset applied to the unnormalized texture coordinate before sampling the texture.
* This offset is applied before applying any texture wrapping modes.
* The offset expression must be a creation-time expression (e.g. vec2<i32>(1, 2)).
* Each offset component must be at least -8 and at most 7.
Values outside of this range will result in a shader-creation error.
`
)
.paramsSubcasesOnly(u =>
u
.combine('S', ['clamp-to-edge', 'repeat', 'mirror-repeat'])
.combine('coords', generateCoordBoundaries(2))
.combine('C', ['i32', 'u32'] as const)
.combine('C_value', [-1, 0, 1, 2, 3, 4] as const)
/* array_index not param'd as out-of-bounds is implementation specific */
.combine('depth_ref', [-1 /* smaller ref */, 0 /* equal ref */, 1 /* larger ref */] as const)
.combine('offset', generateOffsets(2))
)
.unimplemented();
g.test('arrayed_3d_coords')
.specURL('https://www.w3.org/TR/WGSL/#texturesamplecomparelevel')
.desc(
`
C is i32 or u32
fn textureSampleCompareLevel(t: texture_depth_cube_array, s: sampler_comparison, coords: vec3<f32>, array_index: C, depth_ref: f32) -> f32
Parameters:
* t The depth texture to sample.
* s The sampler_comparision type.
* coords The texture coordinates used for sampling.
* array_index: The 0-based texture array index to sample.
* depth_ref The reference value to compare the sampled depth value against.
`
)
.paramsSubcasesOnly(u =>
u
.combine('S', ['clamp-to-edge', 'repeat', 'mirror-repeat'])
.combine('coords', generateCoordBoundaries(3))
.combine('C', ['i32', 'u32'] as const)
.combine('C_value', [-1, 0, 1, 2, 3, 4] as const)
/* array_index not param'd as out-of-bounds is implementation specific */
.combine('depth_ref', [-1 /* smaller ref */, 0 /* equal ref */, 1 /* larger ref */] as const)
)
.unimplemented();
|
