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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| <html> | ||
| <head> | ||
| <script> | ||
| var current_screen_details; | ||
| var rendering_hdr_headroom = 1; | ||
|
|
||
| function onRenderingHdrHeadroomSliderChanged() { | ||
| rendering_hdr_headroom = Math.pow(2.0, RenderingHdrHeadroomSlider.value); | ||
| RenderingHdrHeadroomSliderLabel.innerText = 'Rendering HDR headroom: ' + rendering_hdr_headroom.toFixed(2); | ||
| drawWebGPUCanvas(); | ||
| } | ||
|
|
||
| // Clear the canvas to rendering_hdr_headroom using WebGPU. | ||
| async function drawWebGPUCanvas() { | ||
| const canvas = document.getElementById('WebGPUCanvas'); | ||
| const adapter = await navigator.gpu?.requestAdapter(); | ||
| const device = await adapter?.requestDevice(); | ||
| const context = canvas.getContext('webgpu') | ||
| if (!device || !context) { | ||
| console.error("Failed to initialize WebGPU"); | ||
| return; | ||
| } | ||
| context.configure({ | ||
| device: device, | ||
| format: 'rgba16float', | ||
| colorSpace: 'srgb-linear', | ||
| usage: GPUTextureUsage.RENDER_ATTACHMENT, | ||
| toneMapping: {mode:'clamp-to-extended'}, | ||
| }); | ||
|
|
||
| let v = rendering_hdr_headroom; | ||
| const renderPassDescriptor = { | ||
| colorAttachments: [ | ||
| { | ||
| view: context.getCurrentTexture().createView(), | ||
| clearValue: { r:v, g:v, b:v, a: 1.0 }, | ||
| loadOp: 'clear', | ||
| storeOp: 'store', | ||
| }, | ||
| ], | ||
| }; | ||
|
|
||
| const commandEncoder = device.createCommandEncoder(); | ||
| const passEncoder = commandEncoder.beginRenderPass(renderPassDescriptor); | ||
| passEncoder.setViewport(0, 0, 32, 32, 0, 1); | ||
| passEncoder.end(); | ||
| device.queue.submit([commandEncoder.finish()]); | ||
| } | ||
|
|
||
| function main() { | ||
| // Configure rendering slider. | ||
| RenderingHdrHeadroomSlider.addEventListener('input', onRenderingHdrHeadroomSliderChanged, false); | ||
|
|
||
| drawWebGPUCanvas(); | ||
| } | ||
| </script> | ||
| </head> | ||
|
|
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| <body onload='main()'> | ||
|
|
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| <h1>Screen details</h1> | ||
| <p id="DisplayValue">Screen HDR headroom: (unknown)</p> | ||
| <p><button type="button" id="ButtonDetails">Query screen HDR headroom</button></p> | ||
|
|
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| <h1>Rendering settings</h1> | ||
| <p> | ||
| <label id="RenderingHdrHeadroomSliderLabel" for="RenderingHdrHeadroomSlider">Rendering HDR headroom: 1.00</label>. | ||
| </p> | ||
| <p><input id="RenderingHdrHeadroomSlider" type="range" min="-1" max="4" step="0.1" value="0" list="tickmarks""/></p> | ||
| <datalist id="tickmarks"> | ||
| <option value="-1"></option> | ||
| <option value="0"></option> | ||
| <option value="1"></option> | ||
| <option value="2"></option> | ||
| <option value="3"></option> | ||
| <option value="4"></option> | ||
| </datalist> | ||
| </body> | ||
|
|
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| <h1>WebGPU rendering</h1> | ||
| <p> | ||
| This requires that "Experimental Web Platform features" be enabled in chrome://flags. | ||
| </p> | ||
| <p> | ||
| WebGPU canvas that clears to HDR headroom: | ||
| </p> | ||
| <canvas id="WebGPUCanvas" style="width:32px; height:32px; border:1px solid black;"></canvas> | ||
|
|
||
| </html> |