src/webgpu/compat/api/validation/createBindGroupLayout_limits.spec.ts

export const description = `
Tests that, in compat mode, you can not create a bind group layout with with
more than the max in stage limit even if the per stage limit is higher.
`;

import { makeTestGroup } from '../../../../common/framework/test_group.js';
import { range } from '../../../../common/util/util.js';
import { RequiredLimitsTestMixin } from '../../../gpu_test.js';
import { CompatibilityTest } from '../../compatibility_test.js';

export const g = makeTestGroup(
  RequiredLimitsTestMixin(CompatibilityTest, {
    getRequiredLimits(adapter: GPUAdapter) {
      return {
        maxStorageBuffersInFragmentStage: adapter.limits.maxStorageBuffersInFragmentStage! / 2,
        maxStorageBuffersInVertexStage: adapter.limits.maxStorageBuffersInVertexStage! / 2,
        maxStorageBuffersPerShaderStage: adapter.limits.maxStorageBuffersPerShaderStage,
        maxStorageTexturesInFragmentStage: adapter.limits.maxStorageTexturesInFragmentStage! / 2,
        maxStorageTexturesInVertexStage: adapter.limits.maxStorageTexturesInVertexStage! / 2,
        maxStorageTexturesPerShaderStage: adapter.limits.maxStorageTexturesPerShaderStage,
      };
    },
    key() {
      return `
      maxStorageBuffersInFragmentStage/2,
      maxStorageBuffersInVertexStage/2,
      maxStorageTexturesInFragmentStage/2,
      maxStorageTexturesInVertexStage/2,
      maxStorageBuffersPerShaderStage
      maxStorageTexturesPerShaderStage
    `;
    },
  })
);

g.test('maxStorageBuffersTexturesInVertexFragmentStage')
  .desc(
    `
      Tests that you can't use more than maxStorage(Buffers/Textures)In(Fragment/Vertex)Stage when
      the limit is less than maxStorage(Buffers/Textures)PerShaderStage
    `
  )
  .params(u =>
    u
      .combine('limit', [
        'maxStorageBuffersInFragmentStage',
        'maxStorageBuffersInVertexStage',
        'maxStorageTexturesInFragmentStage',
        'maxStorageTexturesInVertexStage',
      ] as const)
      .beginSubcases()
      .combine('extra', [0, 1] as const)
  )
  .fn(t => {
    const { limit, extra } = t.params;
    const { device } = t;

    const isBuffer = limit.includes('Buffers');
    const inStageLimit = device.limits[limit]!;
    const perStageLimitName = isBuffer
      ? 'maxStorageBuffersPerShaderStage'
      : 'maxStorageTexturesPerShaderStage';
    const perStageLimit = device.limits[perStageLimitName];

    t.debug(`${limit}(${inStageLimit}), ${perStageLimitName}(${perStageLimit})`);

    t.skipIf(inStageLimit === 0, `${limit} is 0`);
    t.skipIf(
      !(inStageLimit < perStageLimit),
      `${limit}(${inStageLimit}) is not less than ${perStageLimitName}(${perStageLimit})`
    );

    const visibility = limit.includes('Fragment') ? GPUShaderStage.FRAGMENT : GPUShaderStage.VERTEX;

    const expectFailure = extra > 0;
    t.expectValidationError(() => {
      device.createBindGroupLayout({
        entries: range(inStageLimit + extra, i => ({
          binding: i,
          visibility,
          ...(isBuffer
            ? { buffer: { type: 'read-only-storage' } }
            : { storageTexture: { format: 'r32float', access: 'read-only' } }),
        })),
      });
    }, expectFailure);
  });