Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The drawIndexed() method of the GPURenderPassEncoder interface draws indexed primitives based on the vertex and index buffers provided by setVertexBuffer() and setIndexBuffer().
js
drawIndexed(indexCount)
drawIndexed(indexCount, instanceCount)
drawIndexed(indexCount, instanceCount, firstIndex)
drawIndexed(indexCount, instanceCount, firstIndex, baseVertex)
drawIndexed(indexCount, instanceCount, firstIndex, baseVertex, firstInstance)
indexCount
A number defining the number of indices to draw.
instanceCount Optional
A number defining the number of instances to draw. If omitted, instanceCount defaults to 1.
firstIndex Optional
A number defining the offset into the index buffer, in indices, to begin drawing from. If omitted, firstIndex defaults to 0.
baseVertex Optional
A number added to each index value before indexing into the vertex buffers. If omitted, baseVertex defaults to 0.
firstInstance Optional
A number defining the first instance to draw. If omitted, firstInstance defaults to 0.
None (Undefined).
In the WebGPU Samples Shadow Mapping example, drawIndexed() is used in two separate render passes in each animation frame, one to populate the shadow buffer and one to draw the primary view of the scene. Study the example code listing for the full context.
js
// ...
const commandEncoder = device.createCommandEncoder();
{
const shadowPass = commandEncoder.beginRenderPass(shadowPassDescriptor);
shadowPass.setPipeline(shadowPipeline);
shadowPass.setBindGroup(0, sceneBindGroupForShadow);
shadowPass.setBindGroup(1, modelBindGroup);
shadowPass.setVertexBuffer(0, vertexBuffer);
shadowPass.setIndexBuffer(indexBuffer, "uint16");
shadowPass.drawIndexed(indexCount);
shadowPass.end();
}
{
const renderPass = commandEncoder.beginRenderPass(renderPassDescriptor);
renderPass.setPipeline(pipeline);
renderPass.setBindGroup(0, sceneBindGroupForRender);
renderPass.setBindGroup(1, modelBindGroup);
renderPass.setVertexBuffer(0, vertexBuffer);
renderPass.setIndexBuffer(indexBuffer, "uint16");
renderPass.drawIndexed(indexCount);
renderPass.end();
}
// ...
| Specification |
|---|
| WebGPU # dom-gpurendercommandsmixin-drawindexed |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
drawIndexed |
113Currently supported on ChromeOS, macOS, and Windows only. |
113Currently supported on ChromeOS, macOS, and Windows only. |
previewCurrently supported on Linux and Windows only. |
No |
99Currently supported on ChromeOS, macOS, and Windows only. |
No | No | No | No | No | No | No |
© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/GPURenderPassEncoder/drawIndexed