48 lines
838 B
Go
48 lines
838 B
Go
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package buffer
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import (
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"fmt"
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"reflect"
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"zworld/engine/renderapi/device"
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"zworld/engine/util"
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)
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type Item[K any] interface {
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T
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// Set the data in the buffer and flushes.
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Set(data K)
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}
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type item[K any] struct {
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T
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}
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// NewItem creates a new typed single-item buffer.
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// When allocating items, the Size argument is ignored
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func NewItem[K any](device device.T, args Args) Item[K] {
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align, maxSize := GetBufferLimits(device, args.Usage)
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var empty K
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kind := reflect.TypeOf(empty)
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element := util.Align(int(kind.Size()), align)
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if element > maxSize {
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panic(fmt.Sprintf("buffer is too large for the specified usage. size: %d, max: %d", element, maxSize))
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}
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args.Size = element
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buffer := New(device, args)
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return &item[K]{
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T: buffer,
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}
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}
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func (i *item[K]) Set(data K) {
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ptr := &data
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i.Write(0, ptr)
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i.Flush()
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}
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