forked from joejulian/gio
Elias Naur
b34216c124
To prepare package headless for multiple backends, refactor the common headless driver to no longer assume an OpenGL context. Instead, introduce a headless backend type and the OpenGL implementation, glBackend. Signed-off-by: Elias Naur <mail@eliasnaur.com>
57 lines
1.1 KiB
Go
57 lines
1.1 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package headless
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import (
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"gioui.org/app/internal/glimpl"
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"gioui.org/gpu"
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"gioui.org/gpu/gl"
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)
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/*
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#cgo CFLAGS: -DGL_SILENCE_DEPRECATION -Werror -Wno-deprecated-declarations -fmodules -fobjc-arc -x objective-c
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#include <CoreFoundation/CoreFoundation.h>
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#include "headless_darwin.h"
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*/
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import "C"
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type nsContext struct {
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c *glimpl.Functions
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ctx C.CFTypeRef
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prepared bool
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}
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func newGLContext() (glContext, error) {
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ctx := C.gio_headless_newContext()
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return &nsContext{ctx: ctx, c: new(glimpl.Functions)}, nil
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}
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func (c *nsContext) MakeCurrent() error {
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C.gio_headless_makeCurrentContext(c.ctx)
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if !c.prepared {
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C.gio_headless_prepareContext(c.ctx)
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c.prepared = true
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}
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return nil
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}
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func (c *nsContext) ReleaseCurrent() {
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C.gio_headless_clearCurrentContext(c.ctx)
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}
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func (c *nsContext) Backend() (gpu.Backend, error) {
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return gl.NewBackend(c.c)
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}
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func (c *nsContext) Functions() *glimpl.Functions {
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return c.c
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}
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func (d *nsContext) Release() {
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if d.ctx != 0 {
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C.gio_headless_releaseContext(d.ctx)
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d.ctx = 0
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}
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}
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