mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
139 lines
4.5 KiB
Go
139 lines
4.5 KiB
Go
// Copyright 2022 The Ebitengine Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cocoa
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import (
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"reflect"
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"unsafe"
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"github.com/ebitengine/purego/objc"
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)
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var (
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class_NSInvocation = objc.GetClass("NSInvocation")
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class_NSMethodSignature = objc.GetClass("NSMethodSignature")
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class_NSAutoreleasePool = objc.GetClass("NSAutoreleasePool")
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class_NSString = objc.GetClass("NSString")
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)
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var (
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sel_alloc = objc.RegisterName("alloc")
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sel_new = objc.RegisterName("new")
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sel_release = objc.RegisterName("release")
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sel_invocationWithMethodSignature = objc.RegisterName("invocationWithMethodSignature:")
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sel_setSelector = objc.RegisterName("setSelector:")
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sel_setTarget = objc.RegisterName("setTarget:")
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sel_setArgumentAtIndex = objc.RegisterName("setArgument:atIndex:")
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sel_getReturnValue = objc.RegisterName("getReturnValue:")
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sel_invoke = objc.RegisterName("invoke")
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sel_instanceMethodSignatureForSelector = objc.RegisterName("instanceMethodSignatureForSelector:")
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sel_signatureWithObjCTypes = objc.RegisterName("signatureWithObjCTypes:")
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sel_initWithUTF8String = objc.RegisterName("initWithUTF8String:")
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sel_UTF8String = objc.RegisterName("UTF8String")
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sel_length = objc.RegisterName("length")
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)
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type CGFloat float64
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type CGSize struct {
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Width, Height CGFloat
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}
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type NSError struct {
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objc.ID
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}
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// NSInvocation is being used to call functions that can't be called directly with purego.SyscallN.
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// See the downsides of that function for what it cannot do.
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type NSInvocation struct {
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objc.ID
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}
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func NSInvocation_invocationWithMethodSignature(sig NSMethodSignature) NSInvocation {
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return NSInvocation{objc.ID(class_NSInvocation).Send(sel_invocationWithMethodSignature, sig.ID)}
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}
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func (inv NSInvocation) SetSelector(_cmd objc.SEL) {
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inv.Send(sel_setSelector, _cmd)
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}
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func (inv NSInvocation) SetTarget(target objc.ID) {
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inv.Send(sel_setTarget, target)
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}
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func (inv NSInvocation) SetArgumentAtIndex(arg unsafe.Pointer, idx int) {
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inv.Send(sel_setArgumentAtIndex, arg, idx)
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}
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func (inv NSInvocation) GetReturnValue(ret unsafe.Pointer) {
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inv.Send(sel_getReturnValue, ret)
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}
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func (inv NSInvocation) Invoke() {
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inv.Send(sel_invoke)
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}
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type NSMethodSignature struct {
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objc.ID
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}
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func NSMethodSignature_instanceMethodSignatureForSelector(self objc.ID, _cmd objc.SEL) NSMethodSignature {
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return NSMethodSignature{self.Send(sel_instanceMethodSignatureForSelector, _cmd)}
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}
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// NSMethodSignature_signatureWithObjCTypes takes a string that represents the type signature of a method.
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// It follows the encoding specified in the Apple Docs.
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//
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// [Apple Docs]: https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtTypeEncodings.html#//apple_ref/doc/uid/TP40008048-CH100
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func NSMethodSignature_signatureWithObjCTypes(types string) NSMethodSignature {
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return NSMethodSignature{objc.ID(class_NSMethodSignature).Send(sel_signatureWithObjCTypes, types)}
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}
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type NSAutoreleasePool struct {
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objc.ID
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}
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func NSAutoreleasePool_new() NSAutoreleasePool {
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return NSAutoreleasePool{objc.ID(class_NSAutoreleasePool).Send(sel_new)}
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}
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func (pool NSAutoreleasePool) Release() {
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pool.Send(sel_release)
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}
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type NSString struct {
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objc.ID
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}
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func NSString_alloc() NSString {
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return NSString{objc.ID(class_NSString).Send(sel_alloc)}
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}
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func (s NSString) InitWithUTF8String(utf8 string) NSString {
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return NSString{s.Send(sel_initWithUTF8String, utf8)}
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}
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func (s NSString) String() string {
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// this will be nicer with unsafe.Slice once ebitengine requires 1.17
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// reflect.SliceHeader is used because it will force Go to copy the string
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// into Go memory when casted to a string
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var b []byte
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header := (*reflect.SliceHeader)(unsafe.Pointer(&b))
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header.Data = uintptr(s.Send(sel_UTF8String))
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header.Len = int(s.Send(sel_length))
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header.Cap = header.Len
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return string(b)
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}
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