core

package
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 Go to latest Published: Dec 12, 2025 License: MIT Imports: 4 Imported by: 0

Documentation

Overview

Package core provides validation and state management for WebGPU resources.

This package implements the core layer between the user-facing API and the hardware abstraction layer (HAL). It handles:

  • Type-safe resource identifiers (ID system)
  • Resource lifecycle management (Registry)
  • State tracking and validation
  • Error handling with detailed messages

Architecture: 

types/  → Data structures (no logic)
core/   → Validation + State tracking (this package)
hal/    → Hardware abstraction layer

The design follows wgpu-core from the Rust wgpu project, adapted for idiomatic Go 1.25+ with generics and modern concurrency patterns.

ID System:

Resources are identified by type-safe IDs that combine an index and epoch: 

type DeviceID = ID[deviceMarker]
id := NewID[deviceMarker](index, epoch)
index, epoch := id.Unzip()

The epoch prevents use-after-free bugs by invalidating old IDs when resources are recycled.

Registry Pattern:

Resources are stored in typed registries that manage their lifecycle: 

registry := NewRegistry[Device, deviceMarker]()
id, err := registry.Register(device)
device, err := registry.Get(id)
registry.Unregister(id)

Thread Safety:

All types in this package are safe for concurrent use unless explicitly documented otherwise.

Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrInvalidID is returned when an ID is invalid or zero.
	ErrInvalidID = errors.New("invalid resource ID")

	// ErrResourceNotFound is returned when a resource is not found in the registry.
	ErrResourceNotFound = errors.New("resource not found")

	// ErrEpochMismatch is returned when the epoch of an ID doesn't match the stored resource.
	ErrEpochMismatch = errors.New("epoch mismatch: resource was recycled")

	// ErrRegistryFull is returned when the registry cannot allocate more IDs.
	ErrRegistryFull = errors.New("registry full: maximum resources reached")

	// ErrResourceInUse is returned when trying to unregister a resource that is still in use.
	ErrResourceInUse = errors.New("resource is still in use")

	// ErrAlreadyDestroyed is returned when operating on an already destroyed resource.
	ErrAlreadyDestroyed = errors.New("resource already destroyed")
)

Base errors for the core package.

Functions

func AdapterDrop 

func AdapterDrop(id AdapterID) error

AdapterDrop releases the specified adapter and its associated resources. After calling this function, the adapter ID becomes invalid.

Returns an error if the adapter ID is invalid or if the adapter cannot be released (e.g., devices are still using it).

Note: Currently this is a simple unregister. In a full implementation, this would check for active devices and properly clean up resources.

func DeviceDrop 

func DeviceDrop(id DeviceID) error

DeviceDrop destroys the device and its queue. After calling this function, the device ID and its queue ID become invalid.

Returns an error if the device ID is invalid or if the device cannot be released (e.g., resources are still using it).

Note: Currently this is a simple unregister. In a full implementation, this would check for active resources and properly clean up.

func GetAdapterFeatures 

func GetAdapterFeatures(id AdapterID) (types.Features, error)

GetAdapterFeatures returns the features supported by the specified adapter. Returns an error if the adapter ID is invalid.

func GetAdapterInfo 

func GetAdapterInfo(id AdapterID) (types.AdapterInfo, error)

GetAdapterInfo returns information about the specified adapter. Returns an error if the adapter ID is invalid.

func GetAdapterLimits 

func GetAdapterLimits(id AdapterID) (types.Limits, error)

GetAdapterLimits returns the resource limits of the specified adapter. Returns an error if the adapter ID is invalid.

func GetDeviceFeatures 

func GetDeviceFeatures(id DeviceID) (types.Features, error)

GetDeviceFeatures returns the device's enabled features. Returns an error if the device ID is invalid.

func GetDeviceLimits 

func GetDeviceLimits(id DeviceID) (types.Limits, error)

GetDeviceLimits returns the device's limits. Returns an error if the device ID is invalid.

func IsFeatureError 

func IsFeatureError(err error) bool

IsFeatureError returns true if the error is a FeatureError.

func IsIDError 

func IsIDError(err error) bool

IsIDError returns true if the error is an IDError.

func IsLimitError 

func IsLimitError(err error) bool

IsLimitError returns true if the error is a LimitError.

func IsValidationError 

func IsValidationError(err error) bool

IsValidationError returns true if the error is a ValidationError.

func QueueOnSubmittedWorkDone 

func QueueOnSubmittedWorkDone(id QueueID) error

QueueOnSubmittedWorkDone returns when all submitted work completes. In the Pure Go implementation, this is synchronous for now.

This function blocks until all work submitted to the queue before this call has completed execution on the GPU.

Returns an error if the queue ID is invalid.

func QueueSubmit 

func QueueSubmit(id QueueID, commandBuffers []CommandBufferID) error

QueueSubmit submits command buffers to the queue. This is a placeholder implementation that will be expanded later.

The command buffers are executed in order. After submission, the command buffer IDs become invalid and cannot be reused.

Returns an error if the queue ID is invalid or if submission fails.

func QueueWriteBuffer 

func QueueWriteBuffer(id QueueID, buffer BufferID, offset uint64, data []byte) error

QueueWriteBuffer writes data to a buffer through the queue. This is a placeholder implementation that will be expanded later.

This is a convenience method for updating buffer data without creating a staging buffer. The data is written at the specified offset in the buffer.

Returns an error if the queue ID or buffer ID is invalid, or if the write operation fails.

func QueueWriteTexture 

func QueueWriteTexture(id QueueID, dst *types.ImageCopyTexture, data []byte, layout *types.TextureDataLayout, size *types.Extent3D) error

QueueWriteTexture writes data to a texture through the queue. This is a placeholder implementation that will be expanded later.

This is a convenience method for updating texture data without creating a staging buffer. The data is written to the specified texture region.

Returns an error if the queue ID or texture ID is invalid, or if the write operation fails.

func ResetGlobal 

func ResetGlobal()

ResetGlobal resets the global instance for testing. This allows tests to start with a clean state. Should only be used in tests.

Types

type Adapter 

type Adapter struct {
	// Info contains information about the adapter.
	Info types.AdapterInfo
	// Features contains the features supported by the adapter.
	Features types.Features
	// Limits contains the resource limits of the adapter.
	Limits types.Limits
	// Backend identifies which graphics backend this adapter uses.
	Backend types.Backend
}

Adapter represents a physical GPU adapter.

type AdapterID 

type AdapterID = ID[adapterMarker]

AdapterID identifies an Adapter resource.

type BindGroup 

type BindGroup struct{}

BindGroup represents a collection of resources bound together.

type BindGroupID 

type BindGroupID = ID[bindGroupMarker]

BindGroupID identifies a BindGroup resource.

type BindGroupLayout 

type BindGroupLayout struct{}

BindGroupLayout represents the layout of a bind group.

type BindGroupLayoutID 

type BindGroupLayoutID = ID[bindGroupLayoutMarker]

BindGroupLayoutID identifies a BindGroupLayout resource.

type Buffer 

type Buffer struct{}

Buffer represents a GPU buffer.

type BufferID 

type BufferID = ID[bufferMarker]

BufferID identifies a Buffer resource.

func DeviceCreateBuffer 

func DeviceCreateBuffer(id DeviceID, desc *types.BufferDescriptor) (BufferID, error)

DeviceCreateBuffer creates a buffer on this device. This is a placeholder implementation that will be expanded later.

Returns a buffer ID that can be used to access the buffer, or an error if buffer creation fails.

type CommandBuffer 

type CommandBuffer struct{}

CommandBuffer represents a recorded command buffer.

type CommandBufferID 

type CommandBufferID = ID[commandBufferMarker]

CommandBufferID identifies a CommandBuffer resource.

type CommandEncoder 

type CommandEncoder struct{}

CommandEncoder represents a command encoder.

type CommandEncoderID 

type CommandEncoderID = ID[commandEncoderMarker]

CommandEncoderID identifies a CommandEncoder resource.

type ComputePipeline 

type ComputePipeline struct{}

ComputePipeline represents a compute pipeline.

type ComputePipelineID 

type ComputePipelineID = ID[computePipelineMarker]

ComputePipelineID identifies a ComputePipeline resource.

type Device 

type Device struct {
	// Adapter is the adapter this device was created from.
	Adapter AdapterID
	// Label is a debug label for the device.
	Label string
	// Features contains the features enabled on this device.
	Features types.Features
	// Limits contains the resource limits of this device.
	Limits types.Limits
	// Queue is the device's default queue.
	Queue QueueID
}

Device represents a logical GPU device.

func GetDevice 

func GetDevice(id DeviceID) (*Device, error)

GetDevice retrieves device data. Returns an error if the device ID is invalid.

type DeviceID 

type DeviceID = ID[deviceMarker]

DeviceID identifies a Device resource.

func CreateDevice 

func CreateDevice(adapterID AdapterID, desc *types.DeviceDescriptor) (DeviceID, error)

CreateDevice creates a device from an adapter. This is called internally by RequestDevice in adapter.go.

The device is created with the specified features and limits, and a default queue is automatically created.

Returns the device ID and an error if device creation fails.

func RequestDevice 

func RequestDevice(adapterID AdapterID, desc *types.DeviceDescriptor) (DeviceID, error)

RequestDevice creates a logical device from the specified adapter. The device is configured according to the provided descriptor.

The descriptor specifies:

  • Required features the device must support
  • Required limits the device must meet
  • Debug label for the device

Returns a DeviceID that can be used to access the device, or an error if device creation fails.

Common failure reasons:

  • Invalid adapter ID
  • Requested features not supported by adapter
  • Requested limits exceed adapter capabilities

type Epoch 

type Epoch = uint32

Epoch is the generation component of a resource ID. It prevents use-after-free by invalidating old IDs.

type FeatureError 

type FeatureError struct {
	Feature  string // Name of the missing feature
	Resource string // Resource that requires it
}

FeatureError represents a missing required feature.

func NewFeatureError 

func NewFeatureError(resource, feature string) *FeatureError

NewFeatureError creates a new feature error.

func (*FeatureError) Error 

func (e *FeatureError) Error() string

Error implements the error interface.

type Global 

type Global struct {
	// contains filtered or unexported fields
}

Global is the singleton managing global WebGPU state. It holds the Hub (for GPU resources) and the surface registry.

The Global provides the top-level API for resource management, coordinating between surfaces and the GPU resource hub.

Thread-safe for concurrent use via singleton pattern.

func GetGlobal 

func GetGlobal() *Global

GetGlobal returns the singleton Global instance. The instance is created lazily on first call.

func (*Global) Clear 

func (g *Global) Clear()

Clear removes all resources from the global state. Note: This does not release IDs properly - use only for cleanup/testing.

func (*Global) GetSurface 

func (g *Global) GetSurface(id SurfaceID) (Surface, error)

GetSurface retrieves a surface by ID.

func (*Global) Hub 

func (g *Global) Hub() *Hub

Hub returns the GPU resource hub. The hub manages all GPU resources (adapters, devices, buffers, etc.).

func (*Global) RegisterSurface 

func (g *Global) RegisterSurface(surface Surface) SurfaceID

RegisterSurface allocates a new ID and stores the surface. Surfaces are managed separately from other GPU resources because they're tied to windowing systems and created before adapters.

func (*Global) Stats 

func (g *Global) Stats() map[string]uint64

Stats returns statistics about global resource usage. Returns surface count and all hub resource counts.

func (*Global) SurfaceCount 

func (g *Global) SurfaceCount() uint64

SurfaceCount returns the number of registered surfaces.

func (*Global) UnregisterSurface 

func (g *Global) UnregisterSurface(id SurfaceID) (Surface, error)

UnregisterSurface removes a surface by ID.

type Hub 

type Hub struct {
	// contains filtered or unexported fields
}

Hub manages all resource registries for WebGPU. It's the central storage for all GPU resources (adapters, devices, buffers, etc.).

The Hub is organized by resource type, with each type having its own registry. This provides type-safe access to resources and automatic ID management.

Thread-safe for concurrent use.

func NewHub 

func NewHub() *Hub

NewHub creates a new hub with initialized registries for all resource types.

func (*Hub) Clear 

func (h *Hub) Clear()

Clear removes all resources from the hub. Note: This does not release IDs properly - use only for cleanup/testing.

func (*Hub) GetAdapter 

func (h *Hub) GetAdapter(id AdapterID) (Adapter, error)

GetAdapter retrieves an adapter by ID.

func (*Hub) GetBindGroup 

func (h *Hub) GetBindGroup(id BindGroupID) (BindGroup, error)

GetBindGroup retrieves a bind group by ID.

func (*Hub) GetBindGroupLayout 

func (h *Hub) GetBindGroupLayout(id BindGroupLayoutID) (BindGroupLayout, error)

GetBindGroupLayout retrieves a bind group layout by ID.

func (*Hub) GetBuffer 

func (h *Hub) GetBuffer(id BufferID) (Buffer, error)

GetBuffer retrieves a buffer by ID.

func (*Hub) GetCommandBuffer 

func (h *Hub) GetCommandBuffer(id CommandBufferID) (CommandBuffer, error)

GetCommandBuffer retrieves a command buffer by ID.

func (*Hub) GetCommandEncoder 

func (h *Hub) GetCommandEncoder(id CommandEncoderID) (CommandEncoder, error)

GetCommandEncoder retrieves a command encoder by ID.

func (*Hub) GetComputePipeline 

func (h *Hub) GetComputePipeline(id ComputePipelineID) (ComputePipeline, error)

GetComputePipeline retrieves a compute pipeline by ID.

func (*Hub) GetDevice 

func (h *Hub) GetDevice(id DeviceID) (Device, error)

GetDevice retrieves a device by ID.

func (*Hub) GetPipelineLayout 

func (h *Hub) GetPipelineLayout(id PipelineLayoutID) (PipelineLayout, error)

GetPipelineLayout retrieves a pipeline layout by ID.

func (*Hub) GetQuerySet 

func (h *Hub) GetQuerySet(id QuerySetID) (QuerySet, error)

GetQuerySet retrieves a query set by ID.

func (*Hub) GetQueue 

func (h *Hub) GetQueue(id QueueID) (Queue, error)

GetQueue retrieves a queue by ID.

func (*Hub) GetRenderPipeline 

func (h *Hub) GetRenderPipeline(id RenderPipelineID) (RenderPipeline, error)

GetRenderPipeline retrieves a render pipeline by ID.

func (*Hub) GetSampler 

func (h *Hub) GetSampler(id SamplerID) (Sampler, error)

GetSampler retrieves a sampler by ID.

func (*Hub) GetShaderModule 

func (h *Hub) GetShaderModule(id ShaderModuleID) (ShaderModule, error)

GetShaderModule retrieves a shader module by ID.

func (*Hub) GetTexture 

func (h *Hub) GetTexture(id TextureID) (Texture, error)

GetTexture retrieves a texture by ID.

func (*Hub) GetTextureView 

func (h *Hub) GetTextureView(id TextureViewID) (TextureView, error)

GetTextureView retrieves a texture view by ID.

func (*Hub) RegisterAdapter 

func (h *Hub) RegisterAdapter(adapter *Adapter) AdapterID

RegisterAdapter allocates a new ID and stores the adapter.

func (*Hub) RegisterBindGroup 

func (h *Hub) RegisterBindGroup(group BindGroup) BindGroupID

RegisterBindGroup allocates a new ID and stores the bind group.

func (*Hub) RegisterBindGroupLayout 

func (h *Hub) RegisterBindGroupLayout(layout BindGroupLayout) BindGroupLayoutID

RegisterBindGroupLayout allocates a new ID and stores the bind group layout.

func (*Hub) RegisterBuffer 

func (h *Hub) RegisterBuffer(buffer Buffer) BufferID

RegisterBuffer allocates a new ID and stores the buffer.

func (*Hub) RegisterCommandBuffer 

func (h *Hub) RegisterCommandBuffer(buffer CommandBuffer) CommandBufferID

RegisterCommandBuffer allocates a new ID and stores the command buffer.

func (*Hub) RegisterCommandEncoder 

func (h *Hub) RegisterCommandEncoder(encoder CommandEncoder) CommandEncoderID

RegisterCommandEncoder allocates a new ID and stores the command encoder.

func (*Hub) RegisterComputePipeline 

func (h *Hub) RegisterComputePipeline(pipeline ComputePipeline) ComputePipelineID

RegisterComputePipeline allocates a new ID and stores the compute pipeline.

func (*Hub) RegisterDevice 

func (h *Hub) RegisterDevice(device Device) DeviceID

RegisterDevice allocates a new ID and stores the device.

func (*Hub) RegisterPipelineLayout 

func (h *Hub) RegisterPipelineLayout(layout PipelineLayout) PipelineLayoutID

RegisterPipelineLayout allocates a new ID and stores the pipeline layout.

func (*Hub) RegisterQuerySet 

func (h *Hub) RegisterQuerySet(querySet QuerySet) QuerySetID

RegisterQuerySet allocates a new ID and stores the query set.

func (*Hub) RegisterQueue 

func (h *Hub) RegisterQueue(queue Queue) QueueID

RegisterQueue allocates a new ID and stores the queue.

func (*Hub) RegisterRenderPipeline 

func (h *Hub) RegisterRenderPipeline(pipeline RenderPipeline) RenderPipelineID

RegisterRenderPipeline allocates a new ID and stores the render pipeline.

func (*Hub) RegisterSampler 

func (h *Hub) RegisterSampler(sampler Sampler) SamplerID

RegisterSampler allocates a new ID and stores the sampler.

func (*Hub) RegisterShaderModule 

func (h *Hub) RegisterShaderModule(module ShaderModule) ShaderModuleID

RegisterShaderModule allocates a new ID and stores the shader module.

func (*Hub) RegisterTexture 

func (h *Hub) RegisterTexture(texture Texture) TextureID

RegisterTexture allocates a new ID and stores the texture.

func (*Hub) RegisterTextureView 

func (h *Hub) RegisterTextureView(view TextureView) TextureViewID

RegisterTextureView allocates a new ID and stores the texture view.

func (*Hub) ResourceCounts 

func (h *Hub) ResourceCounts() map[string]uint64

ResourceCounts returns the count of each resource type in the hub. Useful for debugging and diagnostics.

func (*Hub) UnregisterAdapter 

func (h *Hub) UnregisterAdapter(id AdapterID) (Adapter, error)

UnregisterAdapter removes an adapter by ID.

func (*Hub) UnregisterBindGroup 

func (h *Hub) UnregisterBindGroup(id BindGroupID) (BindGroup, error)

UnregisterBindGroup removes a bind group by ID.

func (*Hub) UnregisterBindGroupLayout 

func (h *Hub) UnregisterBindGroupLayout(id BindGroupLayoutID) (BindGroupLayout, error)

UnregisterBindGroupLayout removes a bind group layout by ID.

func (*Hub) UnregisterBuffer 

func (h *Hub) UnregisterBuffer(id BufferID) (Buffer, error)

UnregisterBuffer removes a buffer by ID.

func (*Hub) UnregisterCommandBuffer 

func (h *Hub) UnregisterCommandBuffer(id CommandBufferID) (CommandBuffer, error)

UnregisterCommandBuffer removes a command buffer by ID.

func (*Hub) UnregisterCommandEncoder 

func (h *Hub) UnregisterCommandEncoder(id CommandEncoderID) (CommandEncoder, error)

UnregisterCommandEncoder removes a command encoder by ID.

func (*Hub) UnregisterComputePipeline 

func (h *Hub) UnregisterComputePipeline(id ComputePipelineID) (ComputePipeline, error)

UnregisterComputePipeline removes a compute pipeline by ID.

func (*Hub) UnregisterDevice 

func (h *Hub) UnregisterDevice(id DeviceID) (Device, error)

UnregisterDevice removes a device by ID.

func (*Hub) UnregisterPipelineLayout 

func (h *Hub) UnregisterPipelineLayout(id PipelineLayoutID) (PipelineLayout, error)

UnregisterPipelineLayout removes a pipeline layout by ID.

func (*Hub) UnregisterQuerySet 

func (h *Hub) UnregisterQuerySet(id QuerySetID) (QuerySet, error)

UnregisterQuerySet removes a query set by ID.

func (*Hub) UnregisterQueue 

func (h *Hub) UnregisterQueue(id QueueID) (Queue, error)

UnregisterQueue removes a queue by ID.

func (*Hub) UnregisterRenderPipeline 

func (h *Hub) UnregisterRenderPipeline(id RenderPipelineID) (RenderPipeline, error)

UnregisterRenderPipeline removes a render pipeline by ID.

func (*Hub) UnregisterSampler 

func (h *Hub) UnregisterSampler(id SamplerID) (Sampler, error)

UnregisterSampler removes a sampler by ID.

func (*Hub) UnregisterShaderModule 

func (h *Hub) UnregisterShaderModule(id ShaderModuleID) (ShaderModule, error)

UnregisterShaderModule removes a shader module by ID.

func (*Hub) UnregisterTexture 

func (h *Hub) UnregisterTexture(id TextureID) (Texture, error)

UnregisterTexture removes a texture by ID.

func (*Hub) UnregisterTextureView 

func (h *Hub) UnregisterTextureView(id TextureViewID) (TextureView, error)

UnregisterTextureView removes a texture view by ID.

func (*Hub) UpdateQueue 

func (h *Hub) UpdateQueue(id QueueID, queue Queue) error

UpdateQueue updates a queue by ID.

type ID 

type ID[T Marker] struct {
	// contains filtered or unexported fields
}

ID is a type-safe resource identifier parameterized by a marker type. Different resource types (Device, Buffer, Texture, etc.) have different marker types, preventing accidental misuse of IDs.

func FromRaw 

func FromRaw[T Marker](raw RawID) ID[T]

FromRaw creates an ID from a raw representation. Use with caution - the caller must ensure type safety.

func NewID 

func NewID[T Marker](index Index, epoch Epoch) ID[T]

NewID creates a new ID from index and epoch components.

func (ID[T]) Epoch 

func (id ID[T]) Epoch() Epoch

Epoch returns the epoch component of the ID.

func (ID[T]) Index 

func (id ID[T]) Index() Index

Index returns the index component of the ID.

func (ID[T]) IsZero 

func (id ID[T]) IsZero() bool

IsZero returns true if the ID is zero (invalid).

func (ID[T]) Raw 

func (id ID[T]) Raw() RawID

Raw returns the underlying RawID.

func (ID[T]) String 

func (id ID[T]) String() string

String returns a string representation of the ID.

func (ID[T]) Unzip 

func (id ID[T]) Unzip() (Index, Epoch)

Unzip extracts the index and epoch from the ID.

type IDError 

type IDError struct {
	ID      RawID  // The problematic ID
	Message string // Error description
	Cause   error  // Underlying cause
}

IDError represents an error related to resource IDs.

func NewIDError 

func NewIDError(id RawID, message string, cause error) *IDError

NewIDError creates a new ID error.

func (*IDError) Error 

func (e *IDError) Error() string

Error implements the error interface.

func (*IDError) Unwrap 

func (e *IDError) Unwrap() error

Unwrap returns the underlying cause.

type IdentityManager 

type IdentityManager[T Marker] struct {
	// contains filtered or unexported fields
}

IdentityManager allocates and manages type-safe resource IDs.

It maintains a pool of available indices and tracks epochs to prevent use-after-free bugs. When an ID is released, its index is recycled but with an incremented epoch, ensuring old IDs become invalid.

Thread-safe for concurrent use.

func NewIdentityManager 

func NewIdentityManager[T Marker]() *IdentityManager[T]

NewIdentityManager creates a new identity manager for the given marker type.

func (*IdentityManager[T]) Alloc 

func (m *IdentityManager[T]) Alloc() ID[T]

Alloc allocates a fresh, never-before-seen ID.

If there are released IDs available, their indices are reused with an incremented epoch. Otherwise, a new index is allocated.

The epoch starts at 1 (not 0) so that zero IDs are always invalid.

func (*IdentityManager[T]) Count 

func (m *IdentityManager[T]) Count() uint64

Count returns the number of currently allocated IDs.

func (*IdentityManager[T]) FreeCount 

func (m *IdentityManager[T]) FreeCount() int

FreeCount returns the number of IDs available for reuse (for testing).

func (*IdentityManager[T]) NextIndex 

func (m *IdentityManager[T]) NextIndex() Index

NextIndex returns the next index that would be allocated (for testing).

func (*IdentityManager[T]) Release 

func (m *IdentityManager[T]) Release(id ID[T])

Release marks an ID as freed, making its index available for reuse.

After release, the ID becomes invalid. Any attempt to use it will fail with an epoch mismatch error.

type Index 

type Index = uint32

Index is the index component of a resource ID. It identifies the slot in the storage array.

type Instance 

type Instance struct {
	// contains filtered or unexported fields
}

Instance represents a WebGPU instance for GPU discovery and initialization. The instance is responsible for enumerating available GPU adapters and creating adapters based on application requirements.

An instance maintains the list of available backends and their configuration. It is the entry point for all WebGPU operations.

Thread-safe for concurrent use.

func NewInstance 

func NewInstance(desc *types.InstanceDescriptor) *Instance

NewInstance creates a new WebGPU instance with the given descriptor. If desc is nil, default settings are used.

The instance will enumerate available GPU adapters based on the enabled backends specified in the descriptor.

func (*Instance) Backends 

func (i *Instance) Backends() types.Backends

Backends returns the enabled backends for this instance.

func (*Instance) EnumerateAdapters 

func (i *Instance) EnumerateAdapters() []AdapterID

EnumerateAdapters returns a list of all available GPU adapters. The adapters are filtered based on the backends enabled in the instance.

This method returns a snapshot of available adapters at the time of the call. The adapter list may change if GPUs are added or removed from the system.

func (*Instance) Flags 

func (i *Instance) Flags() types.InstanceFlags

Flags returns the instance flags.

func (*Instance) RequestAdapter 

func (i *Instance) RequestAdapter(options *types.RequestAdapterOptions) (AdapterID, error)

RequestAdapter requests an adapter matching the given options. Returns the first adapter that meets the requirements, or an error if none found.

Options control adapter selection:

  • PowerPreference: prefer low-power or high-performance adapters
  • ForceFallbackAdapter: use software rendering
  • CompatibleSurface: adapter must support the given surface

If options is nil, the first available adapter is returned.

type LimitError 

type LimitError struct {
	Limit    string // Name of the limit
	Actual   uint64 // Actual value
	Maximum  uint64 // Maximum allowed value
	Resource string // Resource type affected
}

LimitError represents exceeding a resource limit.

func NewLimitError 

func NewLimitError(resource, limit string, actual, maximum uint64) *LimitError

NewLimitError creates a new limit error.

func (*LimitError) Error 

func (e *LimitError) Error() string

Error implements the error interface.

type Marker 

type Marker interface {
	// contains filtered or unexported methods
}

Marker is a constraint for marker types used to distinguish ID types. Marker types are empty structs that provide compile-time type safety.

type PipelineLayout 

type PipelineLayout struct{}

PipelineLayout represents the layout of a pipeline.

type PipelineLayoutID 

type PipelineLayoutID = ID[pipelineLayoutMarker]

PipelineLayoutID identifies a PipelineLayout resource.

type QuerySet 

type QuerySet struct{}

QuerySet represents a set of queries.

type QuerySetID 

type QuerySetID = ID[querySetMarker]

QuerySetID identifies a QuerySet resource.

type Queue 

type Queue struct {
	// Device is the device this queue belongs to.
	Device DeviceID
	// Label is a debug label for the queue.
	Label string
}

Queue represents a command queue for a device.

func GetQueue 

func GetQueue(id QueueID) (*Queue, error)

GetQueue retrieves queue data. Returns an error if the queue ID is invalid.

type QueueID 

type QueueID = ID[queueMarker]

QueueID identifies a Queue resource.

func GetDeviceQueue 

func GetDeviceQueue(id DeviceID) (QueueID, error)

GetDeviceQueue returns the device's queue. Returns an error if the device ID is invalid.

type RawID 

type RawID uint64

RawID is the underlying 64-bit representation of a resource identifier. Layout: lower 32 bits = index, upper 32 bits = epoch.

func Zip 

func Zip(index Index, epoch Epoch) RawID

Zip combines an index and epoch into a RawID.

func (RawID) Epoch 

func (id RawID) Epoch() Epoch

Epoch returns the epoch component of the RawID.

func (RawID) Index 

func (id RawID) Index() Index

Index returns the index component of the RawID.

func (RawID) IsZero 

func (id RawID) IsZero() bool

IsZero returns true if both index and epoch are zero.

func (RawID) String 

func (id RawID) String() string

String returns a string representation of the RawID.

func (RawID) Unzip 

func (id RawID) Unzip() (Index, Epoch)

Unzip extracts the index and epoch from a RawID.

type Registry 

type Registry[T any, M Marker] struct {
	// contains filtered or unexported fields
}

Registry manages the lifecycle of resources of a specific type.

It combines IdentityManager (for ID allocation) with Storage (for item storage) to provide a complete resource management solution.

Thread-safe for concurrent use.

func NewRegistry 

func NewRegistry[T any, M Marker]() *Registry[T, M]

NewRegistry creates a new registry for the given types.

func (*Registry[T, M]) Clear 

func (r *Registry[T, M]) Clear()

Clear removes all items from the registry. Note: This does not release IDs properly - use only for cleanup.

func (*Registry[T, M]) Contains 

func (r *Registry[T, M]) Contains(id ID[M]) bool

Contains checks if an item exists at the given ID.

func (*Registry[T, M]) Count 

func (r *Registry[T, M]) Count() uint64

Count returns the number of registered items.

func (*Registry[T, M]) ForEach 

func (r *Registry[T, M]) ForEach(fn func(ID[M], T) bool)

ForEach iterates over all registered items. The callback receives the ID and item for each entry. Return false from the callback to stop iteration.

func (*Registry[T, M]) Get 

func (r *Registry[T, M]) Get(id ID[M]) (T, error)

Get retrieves an item by ID. Returns the item and nil error if found, or zero value and error if not found or epoch mismatch.

func (*Registry[T, M]) GetMut 

func (r *Registry[T, M]) GetMut(id ID[M], fn func(*T)) error

GetMut retrieves an item by ID for mutation. The callback is called with a pointer to the item if found. Returns nil if successful, or error if not found.

func (*Registry[T, M]) Register 

func (r *Registry[T, M]) Register(item T) ID[M]

Register allocates a new ID and stores the item. Returns the allocated ID.

func (*Registry[T, M]) Unregister 

func (r *Registry[T, M]) Unregister(id ID[M]) (T, error)

Unregister removes an item by ID and releases the ID for reuse. Returns the removed item and nil error, or zero value and error if not found.

type RenderPipeline 

type RenderPipeline struct{}

RenderPipeline represents a render pipeline.

type RenderPipelineID 

type RenderPipelineID = ID[renderPipelineMarker]

RenderPipelineID identifies a RenderPipeline resource.

type Sampler 

type Sampler struct{}

Sampler represents a texture sampler.

type SamplerID 

type SamplerID = ID[samplerMarker]

SamplerID identifies a Sampler resource.

type ShaderModule 

type ShaderModule struct{}

ShaderModule represents a compiled shader module.

type ShaderModuleID 

type ShaderModuleID = ID[shaderModuleMarker]

ShaderModuleID identifies a ShaderModule resource.

func DeviceCreateShaderModule 

func DeviceCreateShaderModule(id DeviceID, desc *types.ShaderModuleDescriptor) (ShaderModuleID, error)

DeviceCreateShaderModule creates a shader module. This is a placeholder implementation that will be expanded later.

Returns a shader module ID that can be used to access the module, or an error if module creation fails.

type Storage 

type Storage[T any, M Marker] struct {
	// contains filtered or unexported fields
}

Storage is an indexed array that stores items by their ID index.

It provides O(1) access to items using the index component of an ID, while validating the epoch to prevent use-after-free.

Thread-safe for concurrent use.

func NewStorage 

func NewStorage[T any, M Marker](capacity int) *Storage[T, M]

NewStorage creates a new storage with optional initial capacity.

func (*Storage[T, M]) Capacity 

func (s *Storage[T, M]) Capacity() int

Capacity returns the current capacity of the storage.

func (*Storage[T, M]) Clear 

func (s *Storage[T, M]) Clear()

Clear removes all items from storage.

func (*Storage[T, M]) Contains 

func (s *Storage[T, M]) Contains(id ID[M]) bool

Contains checks if an item exists at the given ID with matching epoch.

func (*Storage[T, M]) ForEach 

func (s *Storage[T, M]) ForEach(fn func(ID[M], T) bool)

ForEach iterates over all valid items in storage. The callback receives the ID and item for each valid entry. Iteration order is by index.

func (*Storage[T, M]) Get 

func (s *Storage[T, M]) Get(id ID[M]) (T, bool)

Get retrieves an item by ID, validating the epoch. Returns the item and true if found with matching epoch, zero value and false otherwise.

func (*Storage[T, M]) GetMut 

func (s *Storage[T, M]) GetMut(id ID[M], fn func(*T)) bool

GetMut retrieves an item by ID for mutation. The callback is called with the item if found, while holding the write lock. Returns true if the item was found and the callback was called.

func (*Storage[T, M]) Insert 

func (s *Storage[T, M]) Insert(id ID[M], item T)

Insert stores an item at the given ID's index with its epoch. If the index is beyond current capacity, the storage grows automatically.

func (*Storage[T, M]) Len 

func (s *Storage[T, M]) Len() int

Len returns the number of valid items in storage.

func (*Storage[T, M]) Remove 

func (s *Storage[T, M]) Remove(id ID[M]) (T, bool)

Remove removes an item by ID, returning it if found. Returns the item and true if found, zero value and false otherwise.

type StorageItem 

type StorageItem interface {
}

StorageItem is a constraint for items that can be stored in Storage. Items must have an associated marker type for type-safe ID access.

type Surface 

type Surface struct{}

Surface represents a rendering surface.

type SurfaceID 

type SurfaceID = ID[surfaceMarker]

SurfaceID identifies a Surface resource.

type Texture 

type Texture struct{}

Texture represents a GPU texture.

type TextureID 

type TextureID = ID[textureMarker]

TextureID identifies a Texture resource.

func DeviceCreateTexture 

func DeviceCreateTexture(id DeviceID, desc *types.TextureDescriptor) (TextureID, error)

DeviceCreateTexture creates a texture on this device. This is a placeholder implementation that will be expanded later.

Returns a texture ID that can be used to access the texture, or an error if texture creation fails.

type TextureView 

type TextureView struct{}

TextureView represents a view into a texture.

type TextureViewID 

type TextureViewID = ID[textureViewMarker]

TextureViewID identifies a TextureView resource.

type ValidationError 

type ValidationError struct {
	Resource string // Resource type (e.g., "Buffer", "Texture")
	Field    string // Field that failed validation
	Message  string // Detailed error message
	Cause    error  // Underlying cause, if any
}

ValidationError represents a validation failure with context.

func NewValidationError 

func NewValidationError(resource, field, message string) *ValidationError

NewValidationError creates a new validation error.

func NewValidationErrorf 

func NewValidationErrorf(resource, field, format string, args ...any) *ValidationError

NewValidationErrorf creates a new validation error with formatted message.

func (*ValidationError) Error 

func (e *ValidationError) Error() string

Error implements the error interface.

func (*ValidationError) Unwrap 

func (e *ValidationError) Unwrap() error

Unwrap returns the underlying cause.

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