gioui.org/ui@v0.0.0-20190926171558-ce74bc0cbaea/app/gl_macos.go (about)

     1  // SPDX-License-Identifier: Unlicense OR MIT
     2  
     3  // +build darwin,!ios
     4  
     5  package app
     6  
     7  import (
     8  	"gioui.org/ui/app/internal/gl"
     9  )
    10  
    11  /*
    12  #cgo CFLAGS: -DGL_SILENCE_DEPRECATION -fmodules -fobjc-arc -x objective-c
    13  
    14  #include <CoreFoundation/CoreFoundation.h>
    15  #include <CoreGraphics/CoreGraphics.h>
    16  #include <AppKit/AppKit.h>
    17  #include <OpenGL/gl3.h>
    18  #include "gl_macos.h"
    19  */
    20  import "C"
    21  
    22  type context struct {
    23  	c    *gl.Functions
    24  	ctx  C.CFTypeRef
    25  	view C.CFTypeRef
    26  }
    27  
    28  func init() {
    29  	viewFactory = func() C.CFTypeRef {
    30  		return C.gio_createGLView()
    31  	}
    32  }
    33  
    34  func newContext(w *window) (*context, error) {
    35  	view := w.contextView()
    36  	ctx := C.gio_contextForView(view)
    37  	c := &context{
    38  		ctx:  ctx,
    39  		c:    new(gl.Functions),
    40  		view: view,
    41  	}
    42  	return c, nil
    43  }
    44  
    45  func (c *context) Functions() *gl.Functions {
    46  	return c.c
    47  }
    48  
    49  func (c *context) Release() {
    50  	c.Lock()
    51  	defer c.Unlock()
    52  	C.gio_clearCurrentContext()
    53  }
    54  
    55  func (c *context) Present() error {
    56  	// Assume the caller already locked the context.
    57  	C.glFlush()
    58  	return nil
    59  }
    60  
    61  func (c *context) Lock() {
    62  	C.gio_lockContext(c.ctx)
    63  }
    64  
    65  func (c *context) Unlock() {
    66  	C.gio_unlockContext(c.ctx)
    67  }
    68  
    69  func (c *context) MakeCurrent() error {
    70  	c.Lock()
    71  	defer c.Unlock()
    72  	C.gio_makeCurrentContext(c.ctx)
    73  	return nil
    74  }