/
window.go
73 lines (61 loc) · 1.74 KB
/
window.go
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package gl
import (
"log"
"github.com/dfirebaugh/tortuga/config"
"github.com/go-gl/gl/v4.1-core/gl"
"github.com/go-gl/glfw/v3.3/glfw"
)
var (
Texture uint32
Framebuffer uint32
)
func InitGLFW() *glfw.Window {
log.Println("GLFW version:", glfw.GetVersionString())
log.Println("GLFW window classname:", glfw.X11ClassName)
// glfw.InitHint(glfw.X11ClassName)
if err := glfw.Init(); err != nil {
panic(err)
}
c := config.Default()
glfw.WindowHint(glfw.Resizable, glfw.True)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(
c.GetScreenWidth()*c.GetScaleFactor(),
c.GetScreenHeight()*c.GetScaleFactor(),
c.GetTitle(), nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
return window
}
func InitGL() {
err := gl.Init()
if err != nil {
panic(err)
}
}
func InitFrameBuffer() {
{
gl.GenTextures(1, &Texture)
gl.BindTexture(gl.TEXTURE_2D, Texture)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.BindImageTexture(0, Texture, 0, false, 0, gl.WRITE_ONLY, gl.RGBA8)
}
{
gl.GenFramebuffers(1, &Framebuffer)
gl.BindFramebuffer(gl.FRAMEBUFFER, Framebuffer)
gl.FramebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, Texture, 0)
gl.BindFramebuffer(gl.READ_FRAMEBUFFER, Framebuffer)
gl.BindFramebuffer(gl.DRAW_FRAMEBUFFER, 0)
}
}
func Terminate() {
glfw.Terminate()
}