Golang gl.Disable函数代码示例

// initGL initializes GLFW and OpenGL.
func initGL() error {
	err := glfw.Init()
	if err != nil {
		return err
	}

	err = glfw.OpenWindow(AtlasSize, AtlasSize, 8, 8, 8, 8, 0, 0, glfw.Windowed)
	if err != nil {
		glfw.Terminate()
		return err
	}

	glfw.SetWindowTitle("Texture atlas example")
	glfw.SetSwapInterval(1)
	glfw.SetWindowSizeCallback(onResize)
	glfw.SetKeyCallback(onKey)

	gl.Init()
	if err = glh.CheckGLError(); err != nil {
		return err
	}

	gl.Disable(gl.DEPTH_TEST)
	gl.Disable(gl.LIGHTING)
	gl.Enable(gl.TEXTURE_2D)
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.ClearColor(0.2, 0.2, 0.23, 1.0)
	return nil
}

// initGL initializes GLFW and OpenGL.
func initGL(c *cpu.CPU, width, height int) error {
	err := glfw.Init()
	if err != nil {
		return err
	}

	glfw.OpenWindowHint(glfw.WindowNoResize, 1)

	err = glfw.OpenWindow(width, height, 8, 8, 8, 8, 8, 0, glfw.Windowed)
	if err != nil {
		glfw.Terminate()
		return err
	}

	glfw.SetWindowTitle("DCPU")
	glfw.SetSwapInterval(1)
	glfw.SetWindowSizeCallback(onResize)

	gl.Init()
	err = glh.CheckGLError()
	if err != nil {
		return err
	}

	gl.Disable(gl.LIGHTING)
	gl.Disable(gl.DEPTH_TEST)
	gl.Enable(gl.TEXTURE_2D)
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.ClearColor(0, 0, 0, 1)
	return err
}

func (r *RenderTarget) resetGlStates() {
	// Define the default OpenGL states
	gl.Disable(gl.CULL_FACE)
	gl.Disable(gl.LIGHTING)
	gl.Disable(gl.DEPTH_TEST)
	gl.Disable(gl.ALPHA_TEST)
	gl.Enable(gl.TEXTURE_2D)
	gl.Enable(gl.BLEND)
	gl.MatrixMode(gl.MODELVIEW)
	gl.EnableClientState(gl.VERTEX_ARRAY)
	gl.EnableClientState(gl.COLOR_ARRAY)
	gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
	r.glStatesSet = true

	// Apply the default SFML states
	r.applyBlendMode(BlendAlpha)
	r.applyTransform(IdentityTransform())
	r.applyTexture(nil)
	/*if (Shader::isAvailable()){
		r.applyShader(nil)
	}*/
	r.useVertexCache = false

	// Set the default view
	r.SetView(r.View())
}

// initGL initializes GLFW and OpenGL.
func initGL() error {
	err := glfw.Init()
	if err != nil {
		return err
	}

	err = glfw.OpenWindow(640, 480, 8, 8, 8, 8, 0, 0, glfw.Windowed)
	if err != nil {
		glfw.Terminate()
		return err
	}

	glfw.SetWindowTitle("go-gl/gltext: Bitmap font example")
	glfw.SetSwapInterval(1)
	glfw.SetWindowSizeCallback(onResize)
	glfw.SetKeyCallback(onKey)

	errno := gl.Init()
	if errno != gl.NO_ERROR {
		str, err := glu.ErrorString(errno)
		if err != nil {
			return fmt.Errorf("Unknown openGL error: %d", errno)
		}
		return fmt.Errorf(str)
	}

	gl.Disable(gl.DEPTH_TEST)
	gl.Disable(gl.LIGHTING)
	gl.ClearColor(0.2, 0.2, 0.23, 0.0)
	return nil
}

func initGL() error {
	gl.Init()
	if err := glh.CheckGLError(); err != nil {
		return err
	}

	gl.Disable(gl.DEPTH_TEST)
	gl.Enable(gl.MULTISAMPLE)
	gl.Disable(gl.LIGHTING)
	gl.Enable(gl.COLOR_MATERIAL)
	gl.ClearColor(0, 0, 0, 1)

	return nil
}

func (v *Video) Reshape(width int, height int) {
	x_offset := 0
	y_offset := 0

	r := ((float64)(height)) / ((float64)(width))

	if r > 0.9375 { // Height taller than ratio
		h := (int)(math.Floor((float64)(0.9375 * (float64)(width))))
		y_offset = (height - h) / 2
		height = h
	} else if r < 0.9375 { // Width wider
		var scrW, scrH float64
		if ppu.OverscanEnabled {
			scrW = 240.0
			scrH = 224.0
		} else {
			scrW = 256.0
			scrH = 240.0
		}

		w := (int)(math.Floor((float64)((scrH / scrW) * (float64)(height))))
		x_offset = (width - w) / 2
		width = w
	}

	gl.Viewport(x_offset, y_offset, width, height)
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	gl.Ortho(-1, 1, -1, 1, -1, 1)
	gl.MatrixMode(gl.MODELVIEW)
	gl.LoadIdentity()
	gl.Disable(gl.DEPTH_TEST)
}

//Draws all the sprites in the supplied slice
func (sheet SpriteSheet) Draw(sprites []*Sprite) {
	gl.Enable(gl.TEXTURE_2D)
	sheet.texture.Bind(gl.TEXTURE_2D)

	for _, sprite := range sprites {
		gl.Begin(gl.TRIANGLE_STRIP)
		{
			gl.TexCoord2f(sprite.left, sprite.bottom)
			gl.Vertex2f(sprite.X, sprite.Y)

			gl.TexCoord2f(sprite.left, sprite.top)
			gl.Vertex2f(sprite.X, sprite.Y+sprite.H)

			gl.TexCoord2f(sprite.right, sprite.bottom)
			gl.Vertex2f(sprite.X+sprite.W, sprite.Y)

			gl.TexCoord2f(sprite.right, sprite.top)
			gl.Vertex2f(sprite.X+sprite.W, sprite.Y+sprite.H)
		}
		gl.End()
	}

	sheet.texture.Unbind(gl.TEXTURE_2D)
	gl.Disable(gl.TEXTURE_2D)
}

func Init() {

	runtime.LockOSThread()

	// Initialize GLFW

	var err error

	if err = glfw.Init(); err != nil {
		log.Fatalf("%v\n", err)
		return
	}

	err = glfw.OpenWindow(SCREEN_WIDTH, SCREEN_HEIGHT,
		0, 0, 0, 0, 0, 0, glfw.Windowed)

	if err != nil {
		log.Fatalf("%v\n", err)
		return
	}

	glfw.SetWindowTitle("Mandelbrot")
	glfw.SetSwapInterval(1)

	glfw.SetWindowSizeCallback(onResize)
	glfw.SetWindowCloseCallback(onClose)
	glfw.SetMouseButtonCallback(onMouseBtn)
	glfw.SetMouseWheelCallback(onMouseWheel)
	glfw.SetKeyCallback(onKey)
	glfw.SetCharCallback(onChar)

	// Initialize OpenGL
	gl.Disable(gl.DEPTH_TEST)
	gl.ClearColor(0, 0, 0, 0)
}

func onKey(key, state int) {
	switch key {
	case glfw.KeyEsc:
		running = false
	case 76: // L
		if state == 1 {
			if light = !light; !light {
				gl.Disable(gl.LIGHTING)
			} else {
				gl.Enable(gl.LIGHTING)
			}
		}
	case 70: // F
		if state == 1 {
			if filter++; filter >= len(textures) {
				filter = 0
			}
		}
	case glfw.KeyPageup:
		z -= 0.2
	case glfw.KeyPagedown:
		z += 0.2
	case glfw.KeyUp:
		speed[0] -= 0.1
	case glfw.KeyDown:
		speed[0] += 0.1
	case glfw.KeyLeft:
		speed[1] -= 0.1
	case glfw.KeyRight:
		speed[1] += 0.1
	}
}

//DrawElementsInArea is used for redrawing
func (b *Backend) DrawElementsInArea(l gs.DrawPriorityList, area image.Rectangle) {
	gl.Enable(gl.SCISSOR_TEST)
	gl.Scissor(area.Min.X, area.Min.Y, area.Dx(), area.Dy())
	for _, o := range l {
		o.Draw(b)
	}
	gl.Disable(gl.SCISSOR_TEST)
}

// Binds the framebuffer for drawing.
func (fb *Framebuffer) Bind() {
	fb.Buffer.Bind()
	gl.Viewport(0, 0, fb.Width, fb.Height)
	gl.Enable(gl.TEXTURE_2D)
	gl.Disable(gl.DEPTH_TEST)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.Enable(gl.BLEND)
}

func main() {
	_ = fmt.Sprint()

	if !glfw.Init() {
		panic("Can't init glfw!")
	}
	defer glfw.Terminate()

	// antialiasing
	//glfw.WindowHint(glfw.Samples, 4)

	window, err = glfw.CreateWindow(WindowWidth, WindowHeight, "Mozaik", nil, nil)
	if err != nil {
		panic(err)
	}
	defer window.Destroy()

	// Ensure thread context
	window.MakeContextCurrent()
	//glfw.SwapInterval(1)

	window.SetKeyCallback(keyCb)
	window.SetMouseButtonCallback(mouseCb)

	gl.Init()
	gl.ClearColor(0.9, 0.85, 0.46, 0.0)
	// useless in 2D
	gl.Disable(gl.DEPTH_TEST)
	// antialiasing
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.Enable(gl.LINE_SMOOTH)

	for i := int32(32); i < 72; i++ {
		font := loadFonts(i)
		defer font.Release()
		fonts = append(fonts, font)
	}

	// Compute window radius
	windowRadius = math.Sqrt(math.Pow(WindowHeight, 2) + math.Pow(WindowWidth, 2))

	// Use window coordinates
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	gl.Ortho(0, WindowWidth, WindowHeight, 0, 0, 1)
	gl.MatrixMode(gl.MODELVIEW)
	gl.LoadIdentity()

	g = NewGame()

	g.Start()
	go eventLoop(g)
	go renderLoop(g)
	Main()
	g.Stop()
}

func main() {
	err := initGL()
	if err != nil {
		log.Printf("InitGL: %v", err)
		return
	}

	defer glfw.Terminate()

	mb := createBuffer()
	defer mb.Release()

	// Perform the rendering.
	var angle float32
	for glfw.WindowParam(glfw.Opened) > 0 {
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
		gl.LoadIdentity()
		gl.Translatef(0, 0, -6)
		gl.Rotatef(angle, 1, 1, 1)

		// Render a solid cube at half the scale.
		gl.Scalef(0.2, 0.2, 0.2)
		gl.Enable(gl.COLOR_MATERIAL)
		gl.Enable(gl.POLYGON_OFFSET_FILL)
		gl.PolygonMode(gl.FRONT_AND_BACK, gl.FILL)
		mb.Render(gl.QUADS)

		// Render wireframe cubes, with incremental size.
		gl.Disable(gl.COLOR_MATERIAL)
		gl.Disable(gl.POLYGON_OFFSET_FILL)
		gl.PolygonMode(gl.FRONT_AND_BACK, gl.LINE)

		for i := 0; i < 50; i++ {
			scale := 0.004*float32(i) + 1.0
			gl.Scalef(scale, scale, scale)
			mb.Render(gl.QUADS)
		}

		angle += 0.5
		glfw.SwapBuffers()
	}
}

func onKey(key, state int) {
	switch key {
	case glfw.KeyEsc:
		running = false
	case 'L':
		if state == 1 {
			if light = !light; !light {
				gl.Disable(gl.LIGHTING)
			} else {
				gl.Enable(gl.LIGHTING)
			}
		}
	case 'F':
		if state == 1 {
			if filter++; filter >= len(textures) {
				filter = 0
			}
		}
	case 'B': // B
		if state == 1 {
			if blend = !blend; blend {
				gl.Enable(gl.BLEND)
				gl.Disable(gl.DEPTH_TEST)
			} else {
				gl.Disable(gl.BLEND)
				gl.Enable(gl.DEPTH_TEST)
			}
		}
	case glfw.KeyPageup:
		z -= 0.2
	case glfw.KeyPagedown:
		z += 0.2
	case glfw.KeyUp:
		speed[0] -= 0.1
	case glfw.KeyDown:
		speed[0] += 0.1
	case glfw.KeyLeft:
		speed[1] -= 0.1
	case glfw.KeyRight:
		speed[1] += 0.1
	}
}

func main() {
	var err error
	if err = glfw.Init(); err != nil {
		log.Fatalf("%v\n", err)
		return
	}

	defer glfw.Terminate()

	// Open window with FSAA samples (if possible).
	glfw.OpenWindowHint(glfw.FsaaSamples, 4)

	if err = glfw.OpenWindow(400, 400, 0, 0, 0, 0, 0, 0, glfw.Windowed); err != nil {
		log.Fatalf("%v\n", err)
		return
	}

	defer glfw.CloseWindow()

	glfw.SetWindowTitle("Aliasing Detector")
	glfw.SetSwapInterval(1)

	if samples := glfw.WindowParam(glfw.FsaaSamples); samples != 0 {
		fmt.Printf("Context reports FSAA is supported with %d samples\n", samples)
	} else {
		fmt.Printf("Context reports FSAA is unsupported\n")
	}

	gl.MatrixMode(gl.PROJECTION)
	glu.Perspective(0, 1, 0, 1)

	for glfw.WindowParam(glfw.Opened) == 1 {
		time := float32(glfw.Time())

		gl.Clear(gl.COLOR_BUFFER_BIT)

		gl.LoadIdentity()
		gl.Translatef(0.5, 0, 0)
		gl.Rotatef(time, 0, 0, 1)

		gl.Enable(GL_MULTISAMPLE_ARB)
		gl.Color3f(1, 1, 1)
		gl.Rectf(-0.25, -0.25, 0.25, 0.25)

		gl.LoadIdentity()
		gl.Translatef(-0.5, 0, 0)
		gl.Rotatef(time, 0, 0, 1)

		gl.Disable(GL_MULTISAMPLE_ARB)
		gl.Color3f(1, 1, 1)
		gl.Rectf(-0.25, -0.25, 0.25, 0.25)
		glfw.SwapBuffers()
	}
}