func (w *Window) createContext() {
var err error
w.Context, err = sdl.GL_CreateContext(w.Window)
if err != nil {
panic(err)
}
}
func NewWindowedWindow(title string, width, height int) Window {
// FOR GLFW event handling
runtime.LockOSThread()
windowSDL, err := sdl.CreateWindow(title, sdl.WINDOWPOS_UNDEFINED,
sdl.WINDOWPOS_UNDEFINED,
width, height, sdl.WINDOW_OPENGL)
if err != nil {
panic(err)
}
if windowSDL == nil {
panic(sdl.GetError())
}
context, err := sdl.GL_CreateContext(windowSDL)
sdl.GL_MakeCurrent(windowSDL, context)
if err != nil {
panic("Error loading window: " + err.Error())
}
w := Window{title: title, Width: width, Height: height, full: false, windowSDL: windowSDL, contextSDL: context, running: false}
w.init()
var current sdl.DisplayMode
if err := sdl.GetCurrentDisplayMode(0, ¤t); err != nil {
fmt.Println("COuld not get display mode: " + err.Error())
}
fmt.Printf("Display #%d: current display mode is %dx%dpx @ %dhz. \n", 0, current.W, current.H, current.RefreshRate)
return w
}
func main() {
var winTitle string = "Go-SDL2 + Go-GL"
var winWidth, winHeight int = 800, 600
var window *sdl.Window
var context sdl.GLContext
var event sdl.Event
var running bool
var err error
if err = sdl.Init(sdl.INIT_EVERYTHING); err != nil {
panic(err)
}
defer sdl.Quit()
if err = gl.Init(); err != nil {
panic(err)
}
window, err = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight, sdl.WINDOW_OPENGL)
if err != nil {
panic(err)
}
defer window.Destroy()
context, err = sdl.GL_CreateContext(window)
if err != nil {
panic(err)
}
defer sdl.GL_DeleteContext(context)
gl.Enable(gl.DEPTH_TEST)
gl.ClearColor(0.2, 0.2, 0.3, 1.0)
gl.ClearDepth(1)
gl.DepthFunc(gl.LEQUAL)
gl.Viewport(0, 0, int32(winWidth), int32(winHeight))
running = true
for running {
for event = sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
switch t := event.(type) {
case *sdl.QuitEvent:
running = false
case *sdl.MouseMotionEvent:
fmt.Printf("[%d ms] MouseMotion\tid:%d\tx:%d\ty:%d\txrel:%d\tyrel:%d\n", t.Timestamp, t.Which, t.X, t.Y, t.XRel, t.YRel)
}
}
drawgl()
sdl.GL_SwapWindow(window)
}
}
func initGL(window *sdl.Window) sdl.GLContext {
// sdl.GL_SetAttribute(sdl.GL_CONTEXT_FLAGS, sdl.GL_CONTEXT_DEBUG_FLAG)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, sdl.GL_CONTEXT_PROFILE_CORE)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MAJOR_VERSION, 3)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MINOR_VERSION, 2)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_FLAGS, sdl.GL_CONTEXT_FORWARD_COMPATIBLE_FLAG)
sdl.GL_SetAttribute(sdl.GL_ACCELERATED_VISUAL, 1)
sdl.GL_SetAttribute(sdl.GL_DOUBLEBUFFER, 1)
sdl.GL_SetAttribute(sdl.GL_DEPTH_SIZE, 24)
context, err := sdl.GL_CreateContext(window)
if err != nil {
panic(err)
}
if err := gl.InitGlew(); err != nil {
panic(err)
}
return context
}
func main() {
var (
err error
window *sdl.Window
context sdl.GLContext
)
if err = sdl.Init(sdl.INIT_EVERYTHING); err != nil {
panic(err)
}
defer sdl.Quit()
sdl.GL_SetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, sdl.GL_CONTEXT_PROFILE_COMPATIBILITY)
window, err = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, winWidth, winHeight, sdl.WINDOW_OPENGL)
if err != nil {
panic(err)
}
defer window.Destroy()
context, err = sdl.GL_CreateContext(window)
if err != nil {
panic(err)
}
defer sdl.GL_DeleteContext(context)
if err = sdl.GL_MakeCurrent(window, context); err != nil {
panic(err)
}
if err = gl.Init(); err != nil {
panic(err)
}
sdl.GL_SetSwapInterval(1)
printGLInfo()
setupGL()
windowLoop(window)
}
func main() {
var (
err error
window *sdl.Window
context sdl.GLContext
)
if err = sdl.Init(sdl.INIT_EVERYTHING); err != nil {
panic(err)
}
defer sdl.Quit()
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MAJOR_VERSION, 3)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MINOR_VERSION, 2)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, sdl.GL_CONTEXT_PROFILE_CORE)
window, err = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, winWidth, winHeight, sdl.WINDOW_OPENGL)
if err != nil {
panic(err)
}
defer window.Destroy()
context, err = sdl.GL_CreateContext(window)
if err != nil {
panic(err)
}
defer sdl.GL_DeleteContext(context)
if err = sdl.GL_MakeCurrent(window, context); err != nil {
panic(err)
}
if err = gl.Init(); err != nil {
panic(err)
}
printGLInfo()
cameraMatrixUniform := setupGL()
windowLoop(window, cameraMatrixUniform)
}
func TestTexture(t *testing.T) {
if sdl.Init(sdl.INIT_EVERYTHING) != 0 {
panic(sdl.GetError())
}
defer sdl.Quit()
window := sdl.CreateWindow("test", 0, 0, 320, 200, sdl.WINDOW_HIDDEN|sdl.WINDOW_OPENGL)
defer window.Destroy()
sdl.GL_SetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, sdl.GL_CONTEXT_PROFILE_ES)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MAJOR_VERSION, 2)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MINOR_VERSION, 0)
glctx := sdl.GL_CreateContext(window)
defer sdl.GL_DeleteContext(glctx)
tex := gl.CreateTexture()
gl.BindTexture(gl.TEXTURE_2D, tex)
if !gl.IsTexture(tex) {
t.Error(tex, "is not a texture")
}
}
// createWindowAndContext is the actual interface with SDL to create window and context
func createWindowAndContext(config *windowConfig, windowflags uint32) (*window, error) {
setGLFramebufferAttributes(config.Msaa, config.Srgb)
_, debug := os.LookupEnv("AMORE_DEBUG")
setGLContextAttributes(2, 1, debug)
new_window, err := sdl.CreateWindow(config.Title, int(config.X), int(config.Y), int(config.Width), int(config.Height), windowflags)
if err != nil {
panic(err)
}
context, err := sdl.GL_CreateContext(new_window)
if err != nil {
panic(err)
}
current_window = &window{
sdl_window: new_window,
context: context,
should_close: false,
Config: config,
}
return current_window, nil
}
func main() {
var window *sdl.Window
var context sdl.GLContext
var event sdl.Event
var running bool
var err error
runtime.LockOSThread()
if err = sdl.Init(sdl.INIT_EVERYTHING); err != nil {
panic(err)
}
defer sdl.Quit()
window, err = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED,
sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight, sdl.WINDOW_OPENGL)
if err != nil {
panic(err)
}
defer window.Destroy()
context, err = sdl.GL_CreateContext(window)
if err != nil {
panic(err)
}
defer sdl.GL_DeleteContext(context)
gl.Init()
gl.Viewport(0, 0, gl.Sizei(winWidth), gl.Sizei(winHeight))
// OPENGL FLAGS
gl.ClearColor(0.0, 0.1, 0.0, 1.0)
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
// VERTEX BUFFER
var vertexbuffer gl.Uint
gl.GenBuffers(1, &vertexbuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, vertexbuffer)
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(len(triangle_vertices)*4), gl.Pointer(&triangle_vertices[0]), gl.STATIC_DRAW)
// COLOUR BUFFER
var colourbuffer gl.Uint
gl.GenBuffers(1, &colourbuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, colourbuffer)
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(len(triangle_colours)*4), gl.Pointer(&triangle_colours[0]), gl.STATIC_DRAW)
// GUESS WHAT
program := createprogram()
// VERTEX ARRAY
var VertexArrayID gl.Uint
gl.GenVertexArrays(1, &VertexArrayID)
gl.BindVertexArray(VertexArrayID)
gl.EnableVertexAttribArray(0)
gl.BindBuffer(gl.ARRAY_BUFFER, vertexbuffer)
gl.VertexAttribPointer(0, 3, gl.FLOAT, gl.FALSE, 0, nil)
// VERTEX ARRAY HOOK COLOURS
gl.EnableVertexAttribArray(1)
gl.BindBuffer(gl.ARRAY_BUFFER, colourbuffer)
gl.VertexAttribPointer(1, 3, gl.FLOAT, gl.FALSE, 0, nil)
//UNIFORM HOOK
unistring := gl.GLString("scaleMove")
UniScale = gl.GetUniformLocation(program, unistring)
fmt.Printf("Uniform Link: %v\n", UniScale+1)
gl.UseProgram(program)
running = true
for running {
for event = sdl.PollEvent(); event != nil; event =
sdl.PollEvent() {
switch t := event.(type) {
case *sdl.QuitEvent:
running = false
case *sdl.MouseMotionEvent:
xrot = float32(t.Y) / 2
yrot = float32(t.X) / 2
fmt.Printf("[%dms]MouseMotion\tid:%d\tx:%d\ty:%d\txrel:%d\tyrel:%d\n", t.Timestamp, t.Which, t.X, t.Y, t.XRel, t.YRel)
}
}
drawgl()
sdl.GL_SwapWindow(window)
}
}
func main() {
runtime.LockOSThread()
flag.Parse()
if *cpuprofile != "" {
f, err := os.Create(*cpuprofile)
if err != nil {
log.Fatal(err)
}
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
if err := sdl.Init(sdl.INIT_EVERYTHING); err != nil {
panic(err)
}
defer sdl.Quit()
sdl.GL_SetAttribute(sdl.GL_MULTISAMPLESAMPLES, 4)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MAJOR_VERSION, 3)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MINOR_VERSION, 3)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, sdl.GL_CONTEXT_PROFILE_CORE)
sdl.GL_SetAttribute(sdl.GL_DOUBLEBUFFER, 1)
sdl.GL_SetAttribute(sdl.GL_DEPTH_SIZE, 24)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_FLAGS, sdl.GL_CONTEXT_DEBUG_FLAG|sdl.GL_CONTEXT_FORWARD_COMPATIBLE_FLAG)
window, err := sdl.CreateWindow("TOW", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, 1024, 768, sdl.WINDOW_OPENGL|sdl.WINDOW_SHOWN|sdl.WINDOW_RESIZABLE)
if err != nil {
log.Fatal("can't create window", err)
}
defer window.Destroy()
//defer renderer.Destroy()
glcontext, err := sdl.GL_CreateContext(window)
if err != nil {
log.Fatal("can't create context", err)
}
defer sdl.GL_DeleteContext(glcontext)
sdl.GL_MakeCurrent(window, glcontext)
//err := gl.GlewInit()
//fmt.Println(gl.GlewGetErrorString(err))
//glew init
gl.Init()
sdl.GL_SetSwapInterval(1)
fmt.Println("glVersion", gl.GetString(gl.VERSION))
tw.Init(tw.OPENGL_CORE, nil)
defer tw.Terminate()
gl.GetError() // Ignore error
debugContext.InitDebugContext()
world := generation.GenerateWorld(64, 64, 2)
gs := gamestate.NewGameState(window, world)
defer gs.Delete()
worldRenderer := rendering.NewWorldRenderer(window, gs.World)
defer worldRenderer.Delete()
gs.Bar.AddButton("screen shot", worldRenderer.ScreenShot, "")
MainLoop(gs, worldRenderer)
if *memprofile != "" {
f, err := os.Create(*memprofile)
if err != nil {
panic(err)
}
pprof.WriteHeapProfile(f)
f.Close()
return
}
}
func TestBindVariables(t *testing.T) {
if sdl.Init(sdl.INIT_EVERYTHING) != 0 {
panic(sdl.GetError())
}
window := sdl.CreateWindow("test", 0, 0, 320, 200, sdl.WINDOW_HIDDEN|sdl.WINDOW_OPENGL)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, sdl.GL_CONTEXT_PROFILE_ES)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MAJOR_VERSION, 2)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MINOR_VERSION, 0)
glctx := sdl.GL_CreateContext(window)
vs := gl.CreateShader(gl.VERTEX_SHADER)
vs.Source(`
uniform mat4 u_projection;
uniform vec2 u_size;
attribute vec2 a_vertex;
attribute vec2 a_texcoord;
varying vec2 v_texcoord;
void main()
{
v_texcoord = a_texcoord;
gl_Position = u_projection * vec4(a_vertex * u_size, 0, 1);
}
`)
vs.Compile()
fs := gl.CreateShader(gl.FRAGMENT_SHADER)
fs.Source(`
precision mediump float;
uniform sampler2D u_tex;
uniform vec4 u_color;
varying vec2 v_texcoord;
void main()
{
gl_FragColor = texture2D(u_tex, v_texcoord).a * u_color;
}
`)
fs.Compile()
p := gl.CreateProgram()
p.AttachShader(vs)
p.AttachShader(fs)
p.Link()
var v struct {
Proj gl.UniformMatrix4f `glsl:"u_projection"`
Size gl.Uniform2f `glsl:"u_size"`
Tex gl.Uniform1i `glsl:"u_tex"`
Color gl.Uniform4f `glsl:"u_color"`
Vertices gl.Vec2Attrib `glsl:"a_vertex"`
TexCoords gl.Vec2Attrib `glsl:"a_texcoord"`
}
p.BindVariables(&v)
uniforms := []gl.Uniform{v.Proj, v.Size, v.Tex, v.Color}
cksum := 0
for _, u := range uniforms {
cksum |= 1 << uint(u.Location())
}
if cksum != 0xF {
t.Errorf("unexpected uniform locations: %#x", cksum)
}
attributes := []gl.VertexAttrib{v.Vertices, v.TexCoords}
cksum = 0
for _, a := range attributes {
cksum |= 1 << uint(a.Index())
}
if cksum != 0x3 {
t.Errorf("unexpected attribute locations: %#x", cksum)
}
sdl.GL_DeleteContext(glctx)
window.Destroy()
sdl.Quit()
}