//go:build cgo

package wgpu

/*

#include <stdlib.h>

#include "./lib/wgpu.h"

*/

import "C"

import "unsafe"

// cBool / goBool convert between Go bool and WGPUBool.

func cBool(b bool) C.WGPUBool {

if b {

return 1

}

return 0

}

func goBool(b C.WGPUBool) bool { return b != 0 }

// newStringView allocates a C copy of s and wraps it in a WGPUStringView.

// The caller must release it with freeStringView once the C call returns.

// An empty string yields the null view {NULL, 0}.

func newStringView(s string) C.WGPUStringView {

if len(s) == 0 {

return C.WGPUStringView{data: nil, length: 0}

}

return C.WGPUStringView{

data: C.CString(s),

length: C.size_t(len(s)),

}

}

func freeStringView(sv C.WGPUStringView) {

if sv.data != nil {

C.free(unsafe.Pointer(sv.data))

}

}

// goStringView copies an (output) WGPUStringView into a Go string.

func goStringView(sv C.WGPUStringView) string {

if sv.data == nil || sv.length == 0 || sv.length == C.size_t(^uintptr(0)) {

return ""

}

return C.GoStringN(sv.data, C.int(sv.length))

}

// errOr returns msg if non-empty, else fallback.

func errOr(msg, fallback string) string {

if msg != "" {

return msg

}

return fallback

}

// ---- opaque handle types with trivial Release (mirrors cogentcore/wgpu.go) ----

type (

BindGroup struct{ ref C.WGPUBindGroup }

BindGroupLayout struct{ ref C.WGPUBindGroupLayout }

CommandBuffer struct{ ref C.WGPUCommandBuffer }

PipelineLayout struct{ ref C.WGPUPipelineLayout }

QuerySet struct{ ref C.WGPUQuerySet }

ShaderModule struct{ ref C.WGPUShaderModule }

)

func (p *BindGroup) Release() { C.wgpuBindGroupRelease(p.ref) }

func (p *BindGroupLayout) Release() { C.wgpuBindGroupLayoutRelease(p.ref) }

func (p *CommandBuffer) Release() { C.wgpuCommandBufferRelease(p.ref) }

func (p *PipelineLayout) Release() { C.wgpuPipelineLayoutRelease(p.ref) }

func (p *QuerySet) Release() { C.wgpuQuerySetRelease(p.ref) }

func (p *ShaderModule) Release() { C.wgpuShaderModuleRelease(p.ref) }

// GetCount returns the number of queries in the set.

func (p *QuerySet) GetCount() uint32 { return uint32(C.wgpuQuerySetGetCount(p.ref)) }