func (w Window) init() error {
sdl.GL_SetAttribute(sdl.GL_DOUBLEBUFFER, 1)
sdl.GL_SetAttribute(sdl.GL_RED_SIZE, 8)
sdl.GL_SetAttribute(sdl.GL_GREEN_SIZE, 8)
sdl.GL_SetAttribute(sdl.GL_BLUE_SIZE, 8)
sdl.GL_SetAttribute(sdl.GL_ALPHA_SIZE, 8)
return nil
}
// Set hints on the context
func setGLContextAttributes(versionMajor, versionMinor int, debug bool) {
var profilemask, contextflags int
if debug {
profilemask = profilemask | sdl.GL_CONTEXT_PROFILE_COMPATIBILITY
contextflags = contextflags | sdl.GL_CONTEXT_DEBUG_FLAG
}
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MAJOR_VERSION, versionMajor)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_MINOR_VERSION, versionMinor)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, profilemask)
sdl.GL_SetAttribute(sdl.GL_CONTEXT_FLAGS, contextflags)
}
func (w Window) init() error {
sdl.GL_SetAttribute(sdl.GL_DOUBLEBUFFER, 1)
sdl.GL_SetAttribute(sdl.GL_RED_SIZE, 8)
sdl.GL_SetAttribute(sdl.GL_GREEN_SIZE, 8)
sdl.GL_SetAttribute(sdl.GL_BLUE_SIZE, 8)
sdl.GL_SetAttribute(sdl.GL_ALPHA_SIZE, 8)
if err := gl.Init(); err != nil {
return errors.New("Cannot initialize OGL: ")
}
gl.Viewport(0, 0, int32(w.Width), int32(w.Height))
Opengl.CreateBuffers(w.Width, w.Height)
return nil
}
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")
}
}
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 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
}
// Set hints on the sdl framebuffer
func setGLFramebufferAttributes(msaa int, sRGB bool) {
// Set GL window / framebuffer attributes.
sdl.GL_SetAttribute(sdl.GL_RED_SIZE, 8)
sdl.GL_SetAttribute(sdl.GL_GREEN_SIZE, 8)
sdl.GL_SetAttribute(sdl.GL_BLUE_SIZE, 8)
sdl.GL_SetAttribute(sdl.GL_ALPHA_SIZE, 8)
sdl.GL_SetAttribute(sdl.GL_DOUBLEBUFFER, 1)
sdl.GL_SetAttribute(sdl.GL_STENCIL_SIZE, 1)
sdl.GL_SetAttribute(sdl.GL_RETAINED_BACKING, 0)
if msaa > 0 {
sdl.GL_SetAttribute(sdl.GL_MULTISAMPLEBUFFERS, 1)
sdl.GL_SetAttribute(sdl.GL_MULTISAMPLESAMPLES, msaa)
} else {
sdl.GL_SetAttribute(sdl.GL_MULTISAMPLEBUFFERS, 0)
sdl.GL_SetAttribute(sdl.GL_MULTISAMPLESAMPLES, 0)
}
}
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()
}