all: rename the gioui.org/ui module to gioui.org

The "ui" is redundant and stutters.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

app/gl_macos.go

@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+// +build darwin,!ios
+
+package app
+
+import (
+	"gioui.org/app/internal/gl"
+)
+
+/*
+#cgo CFLAGS: -DGL_SILENCE_DEPRECATION -fmodules -fobjc-arc -x objective-c
+
+#include <CoreFoundation/CoreFoundation.h>
+#include <CoreGraphics/CoreGraphics.h>
+#include <AppKit/AppKit.h>
+#include <OpenGL/gl3.h>
+#include "gl_macos.h"
+*/
+import "C"
+
+type context struct {
+	c    *gl.Functions
+	ctx  C.CFTypeRef
+	view C.CFTypeRef
+}
+
+func init() {
+	viewFactory = func() C.CFTypeRef {
+		return C.gio_createGLView()
+	}
+}
+
+func newContext(w *window) (*context, error) {
+	view := w.contextView()
+	ctx := C.gio_contextForView(view)
+	c := &context{
+		ctx:  ctx,
+		c:    new(gl.Functions),
+		view: view,
+	}
+	return c, nil
+}
+
+func (c *context) Functions() *gl.Functions {
+	return c.c
+}
+
+func (c *context) Release() {
+	c.Lock()
+	defer c.Unlock()
+	C.gio_clearCurrentContext()
+}
+
+func (c *context) Present() error {
+	// Assume the caller already locked the context.
+	C.glFlush()
+	return nil
+}
+
+func (c *context) Lock() {
+	C.gio_lockContext(c.ctx)
+}
+
+func (c *context) Unlock() {
+	C.gio_unlockContext(c.ctx)
+}
+
+func (c *context) MakeCurrent() error {
+	c.Lock()
+	defer c.Unlock()
+	C.gio_makeCurrentContext(c.ctx)
+	return nil
+}