playcanvas
Version:
PlayCanvas WebGL game engine
75 lines (73 loc) • 2.25 kB
JavaScript
class WebgpuBindGroup {
update(bindGroup) {
this.destroy();
var device = bindGroup.device;
var desc = this.createDescriptor(device, bindGroup);
this.bindGroup = device.wgpu.createBindGroup(desc);
}
destroy() {
this.bindGroup = null;
}
createDescriptor(device, bindGroup) {
var entries = [];
var format = bindGroup.format;
var uniformBufferFormats = bindGroup.format.uniformBufferFormats;
bindGroup.uniformBuffers.forEach((ub, i)=>{
var slot = uniformBufferFormats[i].slot;
var buffer = ub.persistent ? ub.impl.buffer : ub.allocation.gpuBuffer.buffer;
entries.push({
binding: slot,
resource: {
buffer: buffer,
offset: 0,
size: ub.format.byteSize
}
});
});
var textureFormats = bindGroup.format.textureFormats;
bindGroup.textures.forEach((tex, textureIndex)=>{
var wgpuTexture = tex.impl;
var textureFormat = format.textureFormats[textureIndex];
var slot = textureFormats[textureIndex].slot;
var view = wgpuTexture.getView(device);
entries.push({
binding: slot,
resource: view
});
if (textureFormat.hasSampler) {
var sampler = wgpuTexture.getSampler(device, textureFormat.sampleType);
entries.push({
binding: slot + 1,
resource: sampler
});
}
});
var storageTextureFormats = bindGroup.format.storageTextureFormats;
bindGroup.storageTextures.forEach((tex, textureIndex)=>{
var wgpuTexture = tex.impl;
var slot = storageTextureFormats[textureIndex].slot;
var view = wgpuTexture.getView(device);
entries.push({
binding: slot,
resource: view
});
});
var storageBufferFormats = bindGroup.format.storageBufferFormats;
bindGroup.storageBuffers.forEach((buffer, bufferIndex)=>{
var wgpuBuffer = buffer.impl.buffer;
var slot = storageBufferFormats[bufferIndex].slot;
entries.push({
binding: slot,
resource: {
buffer: wgpuBuffer
}
});
});
var desc = {
layout: bindGroup.format.impl.bindGroupLayout,
entries: entries
};
return desc;
}
}
export { WebgpuBindGroup };