mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-14 15:07:26 +01:00
138 lines
2.8 KiB
Go
138 lines
2.8 KiB
Go
// Copyright 2018 The Ebiten Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package glfw
|
|
|
|
import (
|
|
"fmt"
|
|
"unsafe"
|
|
|
|
"golang.org/x/sys/windows"
|
|
)
|
|
|
|
type dll struct {
|
|
d *windows.LazyDLL
|
|
procs map[string]*windows.LazyProc
|
|
}
|
|
|
|
func (d *dll) call(name string, args ...uintptr) uintptr {
|
|
if d.procs == nil {
|
|
d.procs = map[string]*windows.LazyProc{}
|
|
}
|
|
if _, ok := d.procs[name]; !ok {
|
|
d.procs[name] = d.d.NewProc(name)
|
|
}
|
|
// It looks like there is no way to handle Windows errors correctly.
|
|
r, _, _ := d.procs[name].Call(args...)
|
|
return r
|
|
}
|
|
|
|
func (d *dll) unload() error {
|
|
if err := windows.FreeLibrary(windows.Handle(d.d.Handle())); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func bytePtrToString(ptr *byte) string {
|
|
var bs []byte
|
|
for i := uintptr(0); ; i++ {
|
|
b := *(*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(ptr)) + i))
|
|
if b == 0 {
|
|
break
|
|
}
|
|
bs = append(bs, b)
|
|
}
|
|
return string(bs)
|
|
}
|
|
|
|
type glfwError struct {
|
|
code ErrorCode
|
|
desc string
|
|
}
|
|
|
|
func (e *glfwError) Error() string {
|
|
return fmt.Sprintf("glfw: %s: %s", e.code.String(), e.desc)
|
|
}
|
|
|
|
var lastErr = make(chan *glfwError, 1)
|
|
|
|
func fetchError() *glfwError {
|
|
select {
|
|
case err := <-lastErr:
|
|
return err
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func panicError() {
|
|
if err := acceptError(); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
|
|
func flushErrors() {
|
|
if err := fetchError(); err != nil {
|
|
panic(fmt.Sprintf("glfw: uncaught error: %s", err.Error()))
|
|
}
|
|
}
|
|
|
|
func acceptError(codes ...ErrorCode) error {
|
|
err := fetchError()
|
|
if err == nil {
|
|
return nil
|
|
}
|
|
for _, c := range codes {
|
|
if err.code == c {
|
|
return err
|
|
}
|
|
}
|
|
switch err.code {
|
|
case PlatformError:
|
|
// TODO: Should we log this?
|
|
return nil
|
|
case NotInitialized, NoCurrentContext, InvalidEnum, InvalidValue, OutOfMemory:
|
|
panic(err)
|
|
default:
|
|
panic(fmt.Sprintf("glfw: uncaught error: %s", err.Error()))
|
|
}
|
|
}
|
|
|
|
func goGLFWErrorCallback(code uintptr, desc *byte) uintptr {
|
|
flushErrors()
|
|
err := &glfwError{
|
|
code: ErrorCode(code),
|
|
desc: bytePtrToString(desc),
|
|
}
|
|
select {
|
|
case lastErr <- err:
|
|
default:
|
|
panic(fmt.Sprintf("glfw: uncaught error: %s", err.Error()))
|
|
}
|
|
return 0
|
|
}
|
|
|
|
var glfwDLL *dll
|
|
|
|
func init() {
|
|
dll, err := loadDLL()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
glfwDLL = dll
|
|
|
|
glfwDLL.call("glfwSetErrorCallback", windows.NewCallbackCDecl(goGLFWErrorCallback))
|
|
}
|