forked from joejulian/gio
Elias Naur
bdafb3564f
CFTypeRefs may not always contain valid pointers, so they must not be stored in pointer types lest the Go runtime treats them as such. Signed-off-by: Elias Naur <mail@eliasnaur.com>
73 lines
1.4 KiB
Go
73 lines
1.4 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
|
|
|
|
package headless
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"gioui.org/gpu"
|
|
_ "gioui.org/internal/cocoainit"
|
|
)
|
|
|
|
/*
|
|
#cgo CFLAGS: -Werror -Wno-deprecated-declarations -fmodules -fobjc-arc -x objective-c
|
|
#cgo LDFLAGS: -framework CoreGraphics
|
|
|
|
@import Metal;
|
|
|
|
static CFTypeRef createDevice(void) {
|
|
@autoreleasepool {
|
|
id dev = MTLCreateSystemDefaultDevice();
|
|
return CFBridgingRetain(dev);
|
|
}
|
|
}
|
|
|
|
static CFTypeRef newCommandQueue(CFTypeRef devRef) {
|
|
@autoreleasepool {
|
|
id<MTLDevice> dev = (__bridge id<MTLDevice>)devRef;
|
|
return CFBridgingRetain([dev newCommandQueue]);
|
|
}
|
|
}
|
|
*/
|
|
import "C"
|
|
|
|
type mtlContext struct {
|
|
dev C.CFTypeRef
|
|
queue C.CFTypeRef
|
|
}
|
|
|
|
func init() {
|
|
newContextPrimary = func() (context, error) {
|
|
dev := C.createDevice()
|
|
if dev == 0 {
|
|
return nil, errors.New("headless: failed to create Metal device")
|
|
}
|
|
queue := C.newCommandQueue(dev)
|
|
if queue == 0 {
|
|
C.CFRelease(dev)
|
|
return nil, errors.New("headless: failed to create MTLQueue")
|
|
}
|
|
return &mtlContext{dev: dev, queue: queue}, nil
|
|
}
|
|
}
|
|
|
|
func (c *mtlContext) API() gpu.API {
|
|
return gpu.Metal{
|
|
Device: uintptr(c.dev),
|
|
Queue: uintptr(c.queue),
|
|
PixelFormat: int(C.MTLPixelFormatRGBA8Unorm_sRGB),
|
|
}
|
|
}
|
|
|
|
func (c *mtlContext) MakeCurrent() error {
|
|
return nil
|
|
}
|
|
|
|
func (c *mtlContext) ReleaseCurrent() {}
|
|
|
|
func (d *mtlContext) Release() {
|
|
C.CFRelease(d.dev)
|
|
C.CFRelease(d.queue)
|
|
*d = mtlContext{}
|
|
}
|