mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 04:57:26 +01:00
120 lines
3.2 KiB
Go
120 lines
3.2 KiB
Go
// Copyright 2022 The Ebitengine Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build !android && !ios && !js && !nintendosdk && !playstation5
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package opengl
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import (
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"fmt"
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"runtime"
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"github.com/hajimehoshi/ebiten/v2/internal/glfw"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/opengl/gl"
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"github.com/hajimehoshi/ebiten/v2/internal/microsoftgdk"
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)
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type graphicsPlatform struct {
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window *glfw.Window
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}
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// NewGraphics creates an implementation of graphicsdriver.Graphics for OpenGL.
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// The returned graphics value is nil iff the error is not nil.
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func NewGraphics() (graphicsdriver.Graphics, error) {
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if microsoftgdk.IsXbox() {
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return nil, fmt.Errorf("opengl: OpenGL is not supported on Xbox")
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}
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ctx, err := gl.NewDefaultContext()
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if err != nil {
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return nil, err
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}
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if err := setGLFWClientAPI(ctx.IsES()); err != nil {
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return nil, err
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}
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return newGraphics(ctx), nil
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}
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func setGLFWClientAPI(isES bool) error {
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if isES {
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if err := glfw.WindowHint(glfw.ClientAPI, glfw.OpenGLESAPI); err != nil {
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return err
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}
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if err := glfw.WindowHint(glfw.ContextVersionMajor, 3); err != nil {
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return err
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}
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if err := glfw.WindowHint(glfw.ContextVersionMinor, 0); err != nil {
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return err
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}
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if err := glfw.WindowHint(glfw.ContextCreationAPI, glfw.EGLContextAPI); err != nil {
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return err
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}
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return nil
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}
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if err := glfw.WindowHint(glfw.ClientAPI, glfw.OpenGLAPI); err != nil {
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return err
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}
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if err := glfw.WindowHint(glfw.ContextVersionMajor, 3); err != nil {
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return err
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}
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if err := glfw.WindowHint(glfw.ContextVersionMinor, 2); err != nil {
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return err
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}
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// macOS requires forward-compatible and a core profile.
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if runtime.GOOS == "darwin" {
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if err := glfw.WindowHint(glfw.OpenGLForwardCompat, glfw.True); err != nil {
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return err
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}
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if err := glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile); err != nil {
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return err
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}
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}
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return nil
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}
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func (g *Graphics) SetGLFWWindow(window *glfw.Window) {
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g.window = window
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}
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func (g *Graphics) makeContextCurrent() error {
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return g.window.MakeContextCurrent()
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}
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func (g *Graphics) swapBuffers() error {
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// Call SwapIntervals even though vsync is not changed.
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// When toggling to fullscreen, vsync state might be reset unexpectedly (#1787).
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// SwapInterval is affected by the current monitor of the window.
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// This needs to be called at least after SetMonitor.
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// Without SwapInterval after SetMonitor, vsynch doesn't work (#375).
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if g.vsync {
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if err := glfw.SwapInterval(1); err != nil {
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return err
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}
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} else {
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if err := glfw.SwapInterval(0); err != nil {
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return err
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}
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}
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if err := g.window.SwapBuffers(); err != nil {
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return err
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}
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return nil
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}
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