mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-27 04:08:53 +01:00
101 lines
2.9 KiB
Go
101 lines
2.9 KiB
Go
// Copyright 2023 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 nintendosdk
|
|
|
|
package opengl
|
|
|
|
// #cgo !darwin LDFLAGS: -Wl,-unresolved-symbols=ignore-all
|
|
// #cgo darwin LDFLAGS: -Wl,-undefined,dynamic_lookup
|
|
//
|
|
// #include <EGL/egl.h>
|
|
// #include <EGL/eglext.h>
|
|
import "C"
|
|
|
|
import (
|
|
"fmt"
|
|
)
|
|
|
|
type egl struct {
|
|
display C.EGLDisplay
|
|
surface C.EGLSurface
|
|
context C.EGLContext
|
|
}
|
|
|
|
func newEGL(nativeWindowHandle uintptr) (*egl, error) {
|
|
e := &egl{}
|
|
|
|
e.display = C.eglGetDisplay(C.NativeDisplayType(C.EGL_DEFAULT_DISPLAY))
|
|
if e.display == 0 {
|
|
return nil, fmt.Errorf("opengl: eglGetDisplay failed")
|
|
}
|
|
|
|
if r := C.eglInitialize(e.display, nil, nil); r == 0 {
|
|
return nil, fmt.Errorf("opengl: eglInitialize failed")
|
|
}
|
|
|
|
configAttribs := []C.EGLint{
|
|
C.EGL_RENDERABLE_TYPE, C.EGL_OPENGL_BIT,
|
|
C.EGL_SURFACE_TYPE, C.EGL_WINDOW_BIT,
|
|
C.EGL_RED_SIZE, 8,
|
|
C.EGL_GREEN_SIZE, 8,
|
|
C.EGL_BLUE_SIZE, 8,
|
|
C.EGL_ALPHA_SIZE, 8,
|
|
C.EGL_NONE}
|
|
var numConfigs C.EGLint
|
|
var config C.EGLConfig
|
|
if r := C.eglChooseConfig(e.display, &configAttribs[0], &config, 1, &numConfigs); r == 0 {
|
|
return nil, fmt.Errorf("opengl: eglChooseConfig failed")
|
|
}
|
|
if numConfigs != 1 {
|
|
return nil, fmt.Errorf("opengl: eglChooseConfig failed: numConfigs must be 1 but %d", numConfigs)
|
|
}
|
|
|
|
e.surface = C.eglCreateWindowSurface(e.display, config, C.NativeWindowType(nativeWindowHandle), nil)
|
|
if e.surface == C.EGLSurface(C.EGL_NO_SURFACE) {
|
|
return nil, fmt.Errorf("opengl: eglCreateWindowSurface failed")
|
|
}
|
|
|
|
// Set the current rendering API.
|
|
if r := C.eglBindAPI(C.EGL_OPENGL_API); r == 0 {
|
|
return nil, fmt.Errorf("opengl: eglBindAPI failed")
|
|
}
|
|
|
|
// Create new context and set it as current.
|
|
contextAttribs := []C.EGLint{
|
|
// Set target graphics api version.
|
|
C.EGL_CONTEXT_MAJOR_VERSION, 3,
|
|
C.EGL_CONTEXT_MINOR_VERSION, 2,
|
|
// For debug callback
|
|
C.EGL_CONTEXT_FLAGS_KHR, C.EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR,
|
|
C.EGL_NONE}
|
|
e.context = C.eglCreateContext(e.display, config, C.EGLContext(C.EGL_NO_CONTEXT), &contextAttribs[0])
|
|
if e.context == C.EGLContext(C.EGL_NO_CONTEXT) {
|
|
return nil, fmt.Errorf("opengl: eglCreateContext failed: error: %d", C.eglGetError())
|
|
}
|
|
|
|
return e, nil
|
|
}
|
|
|
|
func (e *egl) makeContextCurrent() error {
|
|
if r := C.eglMakeCurrent(e.display, e.surface, e.surface, e.context); r == 0 {
|
|
return fmt.Errorf("opengl: eglMakeCurrent failed")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (e *egl) swapBuffers() {
|
|
C.eglSwapBuffers(e.display, e.surface)
|
|
}
|