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import { unreachable } from '../../../../../common/util/util.js';
import { GPUTest } from '../../../../gpu_test.js';
import { EncoderType } from '../../../../util/command_buffer_maker.js';
interface BindGroupIndices {
a: number;
b: number;
out: number;
}
export class ProgrammableStateTest extends GPUTest {
private commonBindGroupLayouts: Map<string, GPUBindGroupLayout> = new Map();
getBindGroupLayout(type: GPUBufferBindingType): GPUBindGroupLayout {
if (!this.commonBindGroupLayouts.has(type)) {
this.commonBindGroupLayouts.set(
type,
this.device.createBindGroupLayout({
entries: [
{
binding: 0,
visibility: GPUShaderStage.COMPUTE | GPUShaderStage.FRAGMENT,
buffer: { type },
},
],
})
);
}
return this.commonBindGroupLayouts.get(type)!;
}
getBindGroupLayouts(indices: BindGroupIndices): GPUBindGroupLayout[] {
const bindGroupLayouts: GPUBindGroupLayout[] = [];
bindGroupLayouts[indices.a] = this.getBindGroupLayout('read-only-storage');
bindGroupLayouts[indices.b] = this.getBindGroupLayout('read-only-storage');
bindGroupLayouts[indices.out] = this.getBindGroupLayout('storage');
return bindGroupLayouts;
}
createBindGroup(buffer: GPUBuffer, type: GPUBufferBindingType): GPUBindGroup {
return this.device.createBindGroup({
layout: this.getBindGroupLayout(type),
entries: [{ binding: 0, resource: { buffer } }],
});
}
setBindGroup(
encoder: GPUBindingCommandsMixin,
index: number,
factory: (index: number) => GPUBindGroup
) {
encoder.setBindGroup(index, factory(index));
}
// Create a compute pipeline that performs an operation on data from two bind groups,
// then writes the result to a third bind group.
createBindingStatePipeline<T extends EncoderType>(
encoderType: T,
groups: BindGroupIndices,
algorithm: string = 'a.value - b.value'
): GPUComputePipeline | GPURenderPipeline {
switch (encoderType) {
case 'compute pass': {
const wgsl = `struct Data {
value : i32
};
@group(${groups.a}) @binding(0) var<storage> a : Data;
@group(${groups.b}) @binding(0) var<storage> b : Data;
@group(${groups.out}) @binding(0) var<storage, read_write> out : Data;
@compute @workgroup_size(1) fn main() {
out.value = ${algorithm};
return;
}
`;
return this.device.createComputePipeline({
layout: this.device.createPipelineLayout({
bindGroupLayouts: this.getBindGroupLayouts(groups),
}),
compute: {
module: this.device.createShaderModule({
code: wgsl,
}),
entryPoint: 'main',
},
});
}
case 'render pass':
case 'render bundle': {
const wgslShaders = {
vertex: `
@vertex fn vert_main() -> @builtin(position) vec4<f32> {
return vec4<f32>(0.5, 0.5, 0.0, 1.0);
}
`,
fragment: `
struct Data {
value : i32
};
@group(${groups.a}) @binding(0) var<storage> a : Data;
@group(${groups.b}) @binding(0) var<storage> b : Data;
@group(${groups.out}) @binding(0) var<storage, read_write> out : Data;
@fragment fn frag_main() -> @location(0) vec4<f32> {
out.value = ${algorithm};
return vec4<f32>(1.0, 0.0, 0.0, 1.0);
}
`,
};
return this.device.createRenderPipeline({
layout: this.device.createPipelineLayout({
bindGroupLayouts: this.getBindGroupLayouts(groups),
}),
vertex: {
module: this.device.createShaderModule({
code: wgslShaders.vertex,
}),
entryPoint: 'vert_main',
},
fragment: {
module: this.device.createShaderModule({
code: wgslShaders.fragment,
}),
entryPoint: 'frag_main',
targets: [{ format: 'rgba8unorm' }],
},
primitive: { topology: 'point-list' },
});
}
default:
unreachable();
}
}
setPipeline(pass: GPUBindingCommandsMixin, pipeline: GPUComputePipeline | GPURenderPipeline) {
if (pass instanceof GPUComputePassEncoder) {
pass.setPipeline(pipeline as GPUComputePipeline);
} else if (pass instanceof GPURenderPassEncoder || pass instanceof GPURenderBundleEncoder) {
pass.setPipeline(pipeline as GPURenderPipeline);
}
}
dispatchOrDraw(pass: GPUBindingCommandsMixin) {
if (pass instanceof GPUComputePassEncoder) {
pass.dispatchWorkgroups(1);
} else if (pass instanceof GPURenderPassEncoder) {
pass.draw(1);
} else if (pass instanceof GPURenderBundleEncoder) {
pass.draw(1);
}
}
}
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