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export const description = `API Operation Tests for RenderPass StoreOp.
Tests a render pass with a resolveTarget resolves correctly for many combinations of:
- number of color attachments, some with and some without a resolveTarget
- renderPass storeOp set to {'store', 'discard'}
- resolveTarget mip level {0, >0} (TODO?: different mip level from colorAttachment)
- resolveTarget {2d array layer, TODO: 3d slice} {0, >0} with {2d, TODO: 3d} resolveTarget
(TODO?: different z from colorAttachment)
- TODO: test all renderable color formats
- TODO: test that any not-resolved attachments are rendered to correctly.
- TODO: test different loadOps
- TODO?: resolveTarget mip level {0, >0} (TODO?: different mip level from colorAttachment)
- TODO?: resolveTarget {2d array layer, TODO: 3d slice} {0, >0} with {2d, TODO: 3d} resolveTarget
(different z from colorAttachment)
`;
import { makeTestGroup } from '../../../../common/framework/test_group.js';
import { GPUTest } from '../../../gpu_test.js';
const kSlotsToResolve = [
[0, 2],
[1, 3],
[0, 1, 2, 3],
];
const kSize = 4;
const kFormat: GPUTextureFormat = 'rgba8unorm';
export const g = makeTestGroup(GPUTest);
g.test('render_pass_resolve')
.params(u =>
u
.combine('storeOperation', ['discard', 'store'] as const)
.beginSubcases()
.combine('numColorAttachments', [2, 4] as const)
.combine('slotsToResolve', kSlotsToResolve)
.combine('resolveTargetBaseMipLevel', [0, 1] as const)
.combine('resolveTargetBaseArrayLayer', [0, 1] as const)
)
.fn(t => {
const targets: GPUColorTargetState[] = [];
for (let i = 0; i < t.params.numColorAttachments; i++) {
targets.push({ format: kFormat });
}
// These shaders will draw a white triangle into a texture. After draw, the top left
// half of the texture will be white, and the bottom right half will be unchanged. When this
// texture is resolved, there will be two distinct colors in each portion of the texture, as
// well as a line between the portions that contain the midpoint color due to the multisample
// resolve.
const pipeline = t.device.createRenderPipeline({
layout: 'auto',
vertex: {
module: t.device.createShaderModule({
code: `
@vertex fn main(
@builtin(vertex_index) VertexIndex : u32
) -> @builtin(position) vec4<f32> {
var pos : array<vec2<f32>, 3> = array<vec2<f32>, 3>(
vec2<f32>(-1.0, -1.0),
vec2<f32>(-1.0, 1.0),
vec2<f32>( 1.0, 1.0));
return vec4<f32>(pos[VertexIndex], 0.0, 1.0);
}`,
}),
entryPoint: 'main',
},
fragment: {
module: t.device.createShaderModule({
code: `
struct Output {
@location(0) fragColor0 : vec4<f32>,
@location(1) fragColor1 : vec4<f32>,
@location(2) fragColor2 : vec4<f32>,
@location(3) fragColor3 : vec4<f32>,
};
@fragment fn main() -> Output {
return Output(
vec4<f32>(1.0, 1.0, 1.0, 1.0),
vec4<f32>(1.0, 1.0, 1.0, 1.0),
vec4<f32>(1.0, 1.0, 1.0, 1.0),
vec4<f32>(1.0, 1.0, 1.0, 1.0)
);
}`,
}),
entryPoint: 'main',
targets,
},
primitive: { topology: 'triangle-list' },
multisample: { count: 4 },
});
const resolveTargets: GPUTexture[] = [];
const renderPassColorAttachments: GPURenderPassColorAttachment[] = [];
// The resolve target must be the same size as the color attachment. If we're resolving to mip
// level 1, the resolve target base mip level should be 2x the color attachment size.
const kResolveTargetSize = kSize << t.params.resolveTargetBaseMipLevel;
for (let i = 0; i < t.params.numColorAttachments; i++) {
const colorAttachment = t.device.createTexture({
format: kFormat,
size: { width: kSize, height: kSize, depthOrArrayLayers: 1 },
sampleCount: 4,
mipLevelCount: 1,
usage:
GPUTextureUsage.COPY_DST | GPUTextureUsage.COPY_SRC | GPUTextureUsage.RENDER_ATTACHMENT,
});
if (t.params.slotsToResolve.includes(i)) {
const colorAttachment = t.device.createTexture({
format: kFormat,
size: { width: kSize, height: kSize, depthOrArrayLayers: 1 },
sampleCount: 4,
mipLevelCount: 1,
usage:
GPUTextureUsage.COPY_DST | GPUTextureUsage.COPY_SRC | GPUTextureUsage.RENDER_ATTACHMENT,
});
const resolveTarget = t.device.createTexture({
format: kFormat,
size: {
width: kResolveTargetSize,
height: kResolveTargetSize,
depthOrArrayLayers: t.params.resolveTargetBaseArrayLayer + 1,
},
sampleCount: 1,
mipLevelCount: t.params.resolveTargetBaseMipLevel + 1,
usage: GPUTextureUsage.COPY_SRC | GPUTextureUsage.RENDER_ATTACHMENT,
});
// Clear to black for the load operation. After the draw, the top left half of the attachment
// will be white and the bottom right half will be black.
renderPassColorAttachments.push({
view: colorAttachment.createView(),
clearValue: { r: 0.0, g: 0.0, b: 0.0, a: 0.0 },
loadOp: 'clear',
storeOp: t.params.storeOperation,
resolveTarget: resolveTarget.createView({
baseMipLevel: t.params.resolveTargetBaseMipLevel,
baseArrayLayer: t.params.resolveTargetBaseArrayLayer,
}),
});
resolveTargets.push(resolveTarget);
} else {
renderPassColorAttachments.push({
view: colorAttachment.createView(),
clearValue: { r: 0.0, g: 0.0, b: 0.0, a: 0.0 },
loadOp: 'clear',
storeOp: t.params.storeOperation,
});
}
}
const encoder = t.device.createCommandEncoder();
const pass = encoder.beginRenderPass({
colorAttachments: renderPassColorAttachments,
});
pass.setPipeline(pipeline);
pass.draw(3);
pass.end();
t.device.queue.submit([encoder.finish()]);
// Verify the resolve targets contain the correct values.
for (const resolveTarget of resolveTargets) {
// Test top left pixel, which should be {255, 255, 255, 255}.
t.expectSinglePixelIn2DTexture(
resolveTarget,
kFormat,
{ x: 0, y: 0 },
{
exp: new Uint8Array([0xff, 0xff, 0xff, 0xff]),
slice: t.params.resolveTargetBaseArrayLayer,
layout: { mipLevel: t.params.resolveTargetBaseMipLevel },
}
);
// Test bottom right pixel, which should be {0, 0, 0, 0}.
t.expectSinglePixelIn2DTexture(
resolveTarget,
kFormat,
{ x: kSize - 1, y: kSize - 1 },
{
exp: new Uint8Array([0x00, 0x00, 0x00, 0x00]),
slice: t.params.resolveTargetBaseArrayLayer,
layout: { mipLevel: t.params.resolveTargetBaseMipLevel },
}
);
// Test top right pixel, which should be {127, 127, 127, 127} due to the multisampled resolve.
t.expectSinglePixelBetweenTwoValuesIn2DTexture(
resolveTarget,
kFormat,
{ x: kSize - 1, y: 0 },
{
exp: [new Uint8Array([0x7f, 0x7f, 0x7f, 0x7f]), new Uint8Array([0x80, 0x80, 0x80, 0x80])],
slice: t.params.resolveTargetBaseArrayLayer,
layout: { mipLevel: t.params.resolveTargetBaseMipLevel },
}
);
}
});
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