//
// print OpenGl Version Info
// Prints the OpenGL Version to the Console
//
func printOpenGlVersionInfo() {
version := gl.GoStr(gl.GetString(gl.VERSION))
renderer := gl.GoStr(gl.GetString(gl.RENDERER))
shaderVersion := gl.GoStr(gl.GetString(gl.SHADING_LANGUAGE_VERSION))
fmt.Println("OpenGL version", version)
fmt.Println("OpenGL renderer", renderer)
fmt.Println("Max supported shader language version", shaderVersion)
}
func (glr *GlRenderer) initSystem() {
// Lock goroutine to main thread - required for GL
runtime.LockOSThread()
var err error
if err = glfw.Init(); err != nil {
panic(err)
}
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 3)
glfw.WindowHint(glfw.ContextVersionMinor, 3)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
glr.window, err = glfw.CreateWindow(glr.width, glr.height, "rt", nil, nil)
if err != nil {
panic(err)
}
glr.window.MakeContextCurrent()
if err = gl.Init(); err != nil {
panic(err)
}
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL version", version)
}
func CreateRenderer(windowWidth, windowHeight int) *Renderer {
if err := glfw.Init(); err != nil {
log.Fatalln("failed to initialize glfw:", err)
}
// defer glfw.Terminate()
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
if windowWidth == 0 && windowHeight == 0 {
windowWidth, windowHeight = glfw.GetPrimaryMonitor().GetPhysicalSize()
}
fmt.Println("Window Width -", windowWidth, "Window Height -", windowHeight)
window, err := glfw.CreateWindow(windowWidth, windowHeight, "Karma", glfw.GetPrimaryMonitor(), nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
window.SetKeyCallback(testCallback)
// Initialize Glow
if err := gl.Init(); err != nil {
panic(err)
}
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL version", version)
shaders := Shaders{}
textureFlatUniforms := []string{"projection", "camera", "modelView", "tex"}
textureFlatAttributes := []string{"vert", "vertTexCoord"}
fmt.Println(textureFlatUniforms)
fmt.Println(textureFlatAttributes)
shader, err := createProgram("./assets/shaders/texture_flat.vs", "./assets/shaders/texture_flat.fs", textureFlatUniforms, textureFlatAttributes)
if err != nil {
panic(err)
}
shaders.textureFlat = shader
meshes := []*Mesh{}
previousTime := glfw.GetTime()
return &Renderer{
PreviousTime: previousTime,
Window: window,
Shaders: &shaders,
Meshes: meshes,
}
}