internal/graphicsdriver/opengl/gl: dynamic function load for OpenGL ES

Updates #292
Updates #2450
This commit is contained in:
Hajime Hoshi 2022-11-13 06:29:55 -08:00
parent d09fd90963
commit 39b8a66359
4 changed files with 48 additions and 5 deletions

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@ -12,12 +12,9 @@
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build android || opengles
package gl
// #cgo !android pkg-config: glesv2
// #cgo android LDFLAGS: -lGLESv2
// #cgo LDFLAGS: -lGLESv2
//
// #include <GLES2/gl2.h>
// #include <stdlib.h>

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@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: 2014 Eric Woroshow
//go:build !android && !darwin && !js && !windows && !opengles
//go:build !android && !darwin && !js && !windows
package gl

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@ -0,0 +1,46 @@
// Copyright 2022 The Ebitengine 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.
//go:build !android && !darwin && !js && !nintendosdk && !windows && opengles
package gl
// #cgo LDFLAGS: -ldl
//
// #include <dlfcn.h>
// #include <stdlib.h>
//
// static void* getProcAddress(const char* name) {
// static void* libGLES;
// if (!libGLES) {
// libGLES = dlopen("libGLESv2.so", RTLD_NOW | RTLD_GLOBAL);
// }
// return dlsym(libGLES, name);
// }
import "C"
import (
"strings"
"unsafe"
)
func getProcAddress(namea string) unsafe.Pointer {
const ext = "EXT"
if strings.HasSuffix(namea, ext) {
namea = namea[:len(namea)-len(ext)]
}
cname := C.CString(namea)
defer C.free(unsafe.Pointer(cname))
return C.getProcAddress(cname)
}