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gpu: add Device.enumerateFeaturesOwned helper

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
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Stephen Gutekanst 2022-08-11 12:52:28 -07:00 • committed by Stephen Gutekanst
parent 94568052f5
commit b369635193
2 changed files with 13 additions and 1 deletions
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2
gpu/README.md
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@ -155,6 +155,7 @@ The slice helpers are:
* `Buffer.getConstMappedRange` * `Buffer.getConstMappedRange`
* `Buffer.getMappedRange` * `Buffer.getMappedRange`
* `CommandEncoder.writeBuffer` * `CommandEncoder.writeBuffer`
* `Device.enumerateFeaturesOwned`
* `Queue.writeTexture` * `Queue.writeTexture`
* `Queue.writeBuffer` * `Queue.writeBuffer`
* `RenderPassEncoder.executeBundles` * `RenderPassEncoder.executeBundles`
@ -220,7 +221,6 @@ There may be other opportunities for helpers, to improve the existing APIs, or a
The following are definitive candidates for helpers we haven't implemented yet: The following are definitive candidates for helpers we haven't implemented yet:
* `gpu.ComputePassEncoder.setBindGroup` (slice param) * `gpu.ComputePassEncoder.setBindGroup` (slice param)
* `gpu.Device.enumerateFeatures` (owned slice)
* `gpu.RenderBundleEncoder.setBindGroup` (slice param) * `gpu.RenderBundleEncoder.setBindGroup` (slice param)
* `gpu.RenderPassEncoder.setBindGroup` (slice param) * `gpu.RenderPassEncoder.setBindGroup` (slice param)
* Other `next_in_chain` extensions (look at dawn.json after the bug to get this documented was fixed) * Other `next_in_chain` extensions (look at dawn.json after the bug to get this documented was fixed)

12
gpu/src/device.zig
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@ -181,10 +181,22 @@ pub const Device = opaque {
Impl.deviceDestroy(device); Impl.deviceDestroy(device);
} }
/// Call once with null to determine the array length, and again to fetch the feature list.
///
/// Consider using the enumerateFeaturesOwned helper.
pub inline fn enumerateFeatures(device: *Device, features: [*]FeatureName) usize { pub inline fn enumerateFeatures(device: *Device, features: [*]FeatureName) usize {
return Impl.deviceEnumerateFeatures(device, features); return Impl.deviceEnumerateFeatures(device, features);
} }
/// Enumerates the adapter features, storing the result in an allocated slice which is owned by
/// the caller.
pub inline fn enumerateFeaturesOwned(device: *Device, allocator: std.mem.Allocator) ![]FeatureName {
const count = device.enumerateFeatures(null);
var data = try allocator.alloc(FeatureName, count);
_ = device.enumerateFeatures(data.ptr);
return data;
}
pub inline fn getLimits(device: *Device, limits: *SupportedLimits) bool { pub inline fn getLimits(device: *Device, limits: *SupportedLimits) bool {
return Impl.deviceGetLimits(device, limits); return Impl.deviceGetLimits(device, limits);
} }