예제 #1
0
// OpenGL draw function
func draw() {
	gl.Clear(gl.COLOR_BUFFER_BIT)
	gl.Enable(gl.BLEND)
	gl.Enable(gl.POINT_SMOOTH)
	gl.Enable(gl.LINE_SMOOTH)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.LoadIdentity()

	gl.Begin(gl.LINES)
	gl.Color3f(.2, .2, .2)
	for i := range staticLines {
		x := staticLines[i].GetAsSegment().A.X
		y := staticLines[i].GetAsSegment().A.Y
		gl.Vertex3f(float32(x), float32(y), 0)
		x = staticLines[i].GetAsSegment().B.X
		y = staticLines[i].GetAsSegment().B.Y
		gl.Vertex3f(float32(x), float32(y), 0)
	}
	gl.End()

	gl.Color4f(.3, .3, 1, .8)
	// draw balls
	for _, ball := range balls {
		gl.PushMatrix()
		pos := ball.Body.Position()
		rot := ball.Body.Angle() * chipmunk.DegreeConst
		gl.Translatef(float32(pos.X), float32(pos.Y), 0.0)
		gl.Rotatef(float32(rot), 0, 0, 1)
		drawCircle(float64(ballRadius), 60)
		gl.PopMatrix()
	}
}
예제 #2
0
func (c *Context) init() {
	if err := gl.Init(); err != nil {
		panic(err)
	}
	// Textures' pixel formats are alpha premultiplied.
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA)
}
예제 #3
0
파일: opengl.go 프로젝트: manyminds/tmx
func main() {
	err := glfw.Init()
	if err != nil {
		panic(err)
	}
	defer glfw.Terminate()
	fp, err := os.Open("example.tmx")
	if err != nil {
		panic(err)
	}

	m, err := tmx.NewMap(fp)
	if err != nil {
		panic(err)
	}

	var monitor *glfw.Monitor
	window, err := glfw.CreateWindow(screenWidth, screenHeight, "Map Renderer", monitor, nil)
	if err != nil {
		panic(err)
	}

	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		panic(err)
	}

	width, height := window.GetFramebufferSize()
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
	gl.ClearColor(1.0, 1.0, 1.0, 1.0)
	gl.Viewport(0, 0, int32(width), int32(height))
	gl.MatrixMode(gl.PROJECTION)
	gl.LoadIdentity()
	gl.Ortho(0, float64(width), float64(height), 0, -1, 1)
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	canvas := newOpenGLCanvas(width, height, float32(width)/float32(screenWidth), float32(height)/float32(screenHeight))
	renderer := tmx.NewRenderer(*m, canvas)
	fps := 0
	startTime := time.Now().UnixNano()
	timer := tmx.CreateTimer()
	timer.Start()
	for !window.ShouldClose() {
		elapsed := float64(timer.GetElapsedTime()) / (1000 * 1000)
		renderer.Render(int64(math.Ceil(elapsed)))
		fps++
		if time.Now().UnixNano()-startTime > 1000*1000*1000 {
			log.Println(fps)
			startTime = time.Now().UnixNano()
			fps = 0
		}

		window.SwapBuffers()
		glfw.PollEvents()
		timer.UpdateTime()
	}
}
예제 #4
0
func (c *Context) BlendFunc(mode CompositeMode) {
	_ = c.runOnContextThread(func() error {
		if c.lastCompositeMode == mode {
			return nil
		}
		c.lastCompositeMode = mode
		s, d := operations(mode)
		gl.BlendFunc(uint32(s), uint32(d))
		return nil
	})
}
예제 #5
0
func draw() {
	gl.Clear(gl.COLOR_BUFFER_BIT)
	gl.Enable(gl.BLEND)
	gl.Enable(gl.POINT_SMOOTH)
	gl.Enable(gl.LINE_SMOOTH)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.LoadIdentity()

	//Transform screen to keep player in middle. Added intentation to make obvious the push matrix is like a block
	gl.PushMatrix()
	// gl.Translatef((1280/2)-float32(player.x), 0, 0.0)

	// gl.Begin(gl.LINES)
	// gl.Color3f(.2, .5, .2)
	// for i := range staticLines {
	// 	x := staticLines[i].GetAsSegment().A.X
	// 	y := staticLines[i].GetAsSegment().A.Y
	// 	gl.Vertex3f(float32(x), float32(y), 0)
	// 	x = staticLines[i].GetAsSegment().B.X
	// 	y = staticLines[i].GetAsSegment().B.Y
	// 	gl.Vertex3f(float32(x), float32(y), 0)
	// }
	// gl.End()

	gl.Color4f(player.color_r, player.color_g, player.color_b, player.color_a)

	//Draw Player
	gl.PushMatrix()
	rot := player.rot
	pos_x := player.x
	pos_y := player.y

	gl.Translatef(pos_x, pos_y, 0.0)
	gl.Rotatef(float32(rot), 0, 0, 1)
	drawCircle(float64(BALL_RADIUS), 20)
	gl.PopMatrix()

	//Draw the grapple
	gl.PushMatrix()
	gl.Translatef(player.hook.x_end, player.hook.y_end, 0.0)
	drawCircle(float64(5), 5)
	gl.PopMatrix()

	//Grapple Line
	gl.LineWidth(2.5)
	gl.Color3f(1.0, 0.0, 0.0)
	gl.Begin(gl.LINES)
	gl.Vertex3f(player.x, player.y, 0.0)
	gl.Vertex3f(player.hook.x_end, player.hook.y_end, 0)
	gl.End()

	//Second Pop
	gl.PopMatrix()
}
예제 #6
0
func main() {
	runtime.LockOSThread()

	if err := glfw.Init(); err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	window, err := glfw.CreateWindow(800, 600, "fontstash example", nil, nil)
	if err != nil {
		panic(err)
	}

	window.MakeContextCurrent()
	glfw.SwapInterval(1)
	gl.Init()

	data, err := ioutil.ReadFile(filepath.Join("..", "ClearSans-Regular.ttf"))
	if err != nil {
		panic(err)
	}

	gl.Enable(gl.TEXTURE_2D)

	tmpBitmap := make([]byte, 512*512)
	cdata, err, _, tmpBitmap := truetype.BakeFontBitmap(data, 0, 32, tmpBitmap, 512, 512, 32, 96)
	var ftex uint32
	gl.GenTextures(1, &ftex)
	gl.BindTexture(gl.TEXTURE_2D, ftex)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	gl.TexImage2D(gl.TEXTURE_2D, 0, gl.ALPHA, 512, 512, 0,
		gl.ALPHA, gl.UNSIGNED_BYTE, unsafe.Pointer(&tmpBitmap[0]))

	gl.ClearColor(0.3, 0.3, 0.32, 1.)

	for !window.ShouldClose() {
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
		gl.MatrixMode(gl.PROJECTION)
		gl.LoadIdentity()
		gl.Ortho(0, 800, 600, 0, 0, 1)
		gl.MatrixMode(gl.MODELVIEW)
		gl.LoadIdentity()
		gl.Disable(gl.DEPTH_TEST)
		gl.Color4ub(255, 255, 255, 255)
		gl.Enable(gl.BLEND)
		gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

		my_print(100, 100, "The quick brown fox jumps over the fence", ftex, cdata)

		window.SwapBuffers()
		glfw.PollEvents()
	}
}
예제 #7
0
파일: window.go 프로젝트: fmd/gogol
func setModelViewOptions() {
	gl.Enable(gl.TEXTURE_2D)
	gl.Disable(gl.LIGHTING)
	gl.Disable(gl.DITHER)
	gl.Enable(gl.CULL_FACE)
	gl.CullFace(gl.FRONT)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.Enable(gl.BLEND)
	gl.Enable(gl.ALPHA_TEST)
	gl.DepthFunc(gl.LEQUAL)
	gl.Disable(gl.DEPTH_TEST)
}
예제 #8
0
func reshape(window *glfw.Window, w, h int) {
	gl.ClearColor(1, 1, 1, 1)
	//fmt.Println(gl.GetString(gl.EXTENSIONS))
	gl.Viewport(0, 0, int32(w), int32(h))         /* Establish viewing area to cover entire window. */
	gl.MatrixMode(gl.PROJECTION)                  /* Start modifying the projection matrix. */
	gl.LoadIdentity()                             /* Reset project matrix. */
	gl.Ortho(0, float64(w), 0, float64(h), -1, 1) /* Map abstract coords directly to window coords. */
	gl.Scalef(1, -1, 1)                           /* Invert Y axis so increasing Y goes down. */
	gl.Translatef(0, float32(-h), 0)              /* Shift origin up to upper-left corner. */
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.Disable(gl.DEPTH_TEST)
	width, height = w, h
}
예제 #9
0
// OpenGL draw function
func draw() {
	gl.Clear(gl.COLOR_BUFFER_BIT)
	gl.Enable(gl.BLEND)
	gl.Enable(gl.POINT_SMOOTH)
	gl.Enable(gl.LINE_SMOOTH)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.LoadIdentity()

	player := game.Player

	//Transform screen.
	gl.PushMatrix()
	gl.Translatef((1280/2)-float32((player.Body.Position().X)), 0, 0.0)

	gl.Begin(gl.LINES)
	gl.Color3f(.2, .5, .2)
	for _, segment := range game.Level.GetChipmunkSegments() {
		x := segment.GetAsSegment().A.X
		y := segment.GetAsSegment().A.Y
		gl.Vertex3f(float32(x), float32(y), 0)
		x = segment.GetAsSegment().B.X
		y = segment.GetAsSegment().B.Y
		gl.Vertex3f(float32(x), float32(y), 0)
	}
	gl.End()

	gl.Color4f(.9, .1, 1, .9)
	// draw balls
	for _, enemy := range game.Enemies {
		gl.PushMatrix()
		pos := enemy.Body.Position()
		rot := enemy.Body.Angle() * game.DegreeConst
		gl.Translatef(float32(pos.X), float32(pos.Y), 0.0)
		gl.Rotatef(float32(rot), 0, 0, 1)
		drawCircle(float64(enemy.Radius), 60)
		gl.PopMatrix()
	}
	gl.Color4f(.3, .3, 1, .8)
	//Draw Player
	gl.PushMatrix()
	pos := player.Body.Position()
	rot := player.Body.Angle() * game.DegreeConst
	gl.Translatef(float32(pos.X), float32(pos.Y), 0.0)
	gl.Rotatef(float32(rot), 0, 0, 1)
	drawCircle(float64(player.Radius), 60)
	gl.PopMatrix()

	gl.PopMatrix()
}
예제 #10
0
func onDisplay(program uint32, coords uint32) {
	gl.ClearColor(1.0, 1.0, 1.0, 1.0)
	gl.Clear(gl.COLOR_BUFFER_BIT)

	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	gl.UseProgram(program)
	gl.EnableVertexAttribArray(coords)

	gl.VertexAttribPointer(coords, 2, gl.FLOAT, false, 0, nil)
	gl.DrawArrays(gl.TRIANGLES, 0, 3)
	gl.DisableVertexAttribArray(coords)

}
예제 #11
0
func (atlas *FontAtlas) Draw(text string, b Bounds) {
	atlas.LoadGlyphs(text)

	gl.Enable(gl.BLEND)
	defer gl.Disable(gl.BLEND)
	gl.BlendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA)

	gl.Enable(gl.TEXTURE_2D)
	defer gl.Disable(gl.TEXTURE_2D)
	gl.BindTexture(gl.TEXTURE_2D, atlas.Texture)

	x := b.Min.X + atlas.drawPadding
	y := (b.Max.Y+b.Min.Y)/2 + (ceilPxf(atlas.maxBounds.Min.Y)+ceilPxf(atlas.maxBounds.Max.Y))/2

	p := rune(0)
	for _, r := range text {
		glyph := atlas.Rendered[r]

		dx := float32(glyph.Loc.Dx())
		dy := float32(glyph.Loc.Dy())

		px := x + ceilPxf(glyph.Bounds.Min.X) - glyphPadding
		py := y + ceilPxf(glyph.Bounds.Min.Y) - glyphPadding

		// this is not the ideal way of positioning the letters
		// will create positioning artifacts
		// but it the result is more
		px = float32(math.Trunc(float64(px)))
		py = float32(math.Trunc(float64(py)))

		gl.Begin(gl.QUADS)
		{
			gl.TexCoord2f(glyph.RelLoc.Min.X, glyph.RelLoc.Min.Y)
			gl.Vertex2f(px, py)
			gl.TexCoord2f(glyph.RelLoc.Max.X, glyph.RelLoc.Min.Y)
			gl.Vertex2f(px+dx, py)
			gl.TexCoord2f(glyph.RelLoc.Max.X, glyph.RelLoc.Max.Y)
			gl.Vertex2f(px+dx, py+dy)
			gl.TexCoord2f(glyph.RelLoc.Min.X, glyph.RelLoc.Max.Y)
			gl.Vertex2f(px, py+dy)
		}
		gl.End()

		k := atlas.Face.Kern(p, r)
		p = r
		x += ceilPxf(glyph.Advance + k)
	}
}
예제 #12
0
func (atlas *FontAtlas) draw(rendered *image.RGBA, b Bounds) {
	var texture uint32
	gl.Enable(gl.TEXTURE_2D)
	gl.GenTextures(1, &texture)
	gl.BindTexture(gl.TEXTURE_2D, texture)

	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	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.TexImage2D(
		gl.TEXTURE_2D,
		0,
		gl.RGBA,
		int32(rendered.Bounds().Dx()),
		int32(rendered.Bounds().Dy()),
		0,
		gl.RGBA,
		gl.UNSIGNED_BYTE,
		gl.Ptr(rendered.Pix))

	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA)

	gl.Begin(gl.QUADS)
	{
		gl.TexCoord2f(0, 0)
		gl.Vertex2f(b.Min.X, b.Min.Y)
		gl.TexCoord2f(1, 0)
		gl.Vertex2f(b.Max.X, b.Min.Y)
		gl.TexCoord2f(1, 1)
		gl.Vertex2f(b.Max.X, b.Max.Y)
		gl.TexCoord2f(0, 1)
		gl.Vertex2f(b.Min.X, b.Max.Y)
	}
	gl.End()

	gl.Disable(gl.BLEND)

	gl.DeleteTextures(1, &texture)
	gl.Disable(gl.TEXTURE_2D)
}
예제 #13
0
파일: graphics.go 프로젝트: gonutz/settlers
func (g *graphics) init() error {
	if err := g.loadImages(); err != nil {
		return err
	}

	gl.ClearColor(0, 0, 0.7, 1)
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	g.fontStash = fontstash.New(512, 512)
	fontID, err := g.fontStash.AddFont(resourcePath("MorrisRoman-Black.ttf"))
	if err != nil {
		return err
	}
	g.fontStash.SetYInverted(true)
	g.font = NewGLFont(g.fontStash, fontID, 45, [4]float32{0, 0, 0, 1})

	return nil
}
예제 #14
0
파일: render.go 프로젝트: egonelbre/spector
func List(width, height int, list *draw.List) {
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	gl.Enable(gl.SCISSOR_TEST)
	defer gl.Disable(gl.SCISSOR_TEST)

	gl.EnableClientState(gl.VERTEX_ARRAY)
	defer gl.DisableClientState(gl.VERTEX_ARRAY)

	gl.EnableClientState(gl.COLOR_ARRAY)
	defer gl.DisableClientState(gl.COLOR_ARRAY)

	gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
	defer gl.DisableClientState(gl.TEXTURE_COORD_ARRAY)

	gl.VertexPointer(2, gl.FLOAT, vertexStride, unsafe.Pointer(&(list.Vertices[0].P)))
	gl.TexCoordPointer(2, gl.FLOAT, vertexStride, unsafe.Pointer(&(list.Vertices[0].UV)))
	gl.ColorPointer(4, gl.UNSIGNED_BYTE, vertexStride, unsafe.Pointer(&(list.Vertices[0].Color)))

	offset := 0
	for _, cmd := range list.Commands {
		if cmd.Count == 0 {
			continue
		}
		if cmd.Texture == 0 {
			gl.Disable(gl.TEXTURE_2D)
		} else {
			gl.Enable(gl.TEXTURE_2D)
			gl.BindTexture(gl.TEXTURE_2D, uint32(cmd.Texture))
		}

		x, y, w, h := cmd.Clip.AsInt32()
		gl.Scissor(x, int32(height)-y-h, w, h)
		gl.DrawElements(gl.TRIANGLES, int32(cmd.Count), indexType, gl.Ptr(list.Indicies[offset:]))
		offset += int(cmd.Count)
	}
}
예제 #15
0
func onDisplay(program uint32) {
	coords := uint32(attributeCoord2d)
	vcolor := uint32(attributeVColor)

	gl.ClearColor(1.0, 1.0, 1.0, 1.0)
	gl.Clear(gl.COLOR_BUFFER_BIT)

	gl.UseProgram(program)
	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.Uniform1f(uniformFade, curFade)

	gl.EnableVertexAttribArray(coords)
	gl.EnableVertexAttribArray(vcolor)
	gl.BindBuffer(gl.ARRAY_BUFFER, vboTriangle)
	gl.VertexAttribPointer(coords, 2, gl.FLOAT, false, 5*floatSize, nil)
	gl.VertexAttribPointer(vcolor, 3, gl.FLOAT, false, 5*floatSize, gl.PtrOffset(2*floatSize))

	gl.DrawArrays(gl.TRIANGLES, 0, 3)

	gl.DisableVertexAttribArray(vcolor)
	gl.DisableVertexAttribArray(coords)
}
예제 #16
0
파일: gl_gl2.go 프로젝트: EngoEngine/gl
func (c *Context) BlendFunc(src, dst int) {
	gl.BlendFunc(uint32(src), uint32(dst))
}
예제 #17
0
func main() {
	runtime.LockOSThread()

	if err := glfw.Init(); err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	window, err := glfw.CreateWindow(800, 600, "fontstash example", nil, nil)
	if err != nil {
		panic(err)
	}

	window.MakeContextCurrent()
	glfw.SwapInterval(1)
	gl.Init()

	stash := fontstash.New(512, 512)

	clearSansRegular, err := stash.AddFont(filepath.Join("..", "ClearSans-Regular.ttf"))
	if err != nil {
		panic(err)
	}

	clearSansItalic, err := stash.AddFont(filepath.Join("..", "ClearSans-Italic.ttf"))
	if err != nil {
		panic(err)
	}

	clearSansBold, err := stash.AddFont(filepath.Join("..", "ClearSans-Bold.ttf"))
	if err != nil {
		panic(err)
	}

	droidJapanese, err := stash.AddFont(filepath.Join("..", "DroidSansJapanese.ttf"))
	if err != nil {
		panic(err)
	}

	gl.ClearColor(0.3, 0.3, 0.32, 1.)

	for !window.ShouldClose() {
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
		gl.MatrixMode(gl.PROJECTION)
		gl.LoadIdentity()
		gl.Ortho(0, 800, 0, 600, -1, 1)
		gl.MatrixMode(gl.MODELVIEW)
		gl.LoadIdentity()
		gl.Disable(gl.DEPTH_TEST)
		gl.Color4ub(255, 255, 255, 255)
		gl.Enable(gl.BLEND)
		gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

		gl.Disable(gl.TEXTURE_2D)
		gl.Begin(gl.QUADS)
		gl.Vertex2i(0, -5)
		gl.Vertex2i(5, -5)
		gl.Vertex2i(5, -11)
		gl.Vertex2i(0, -11)
		gl.End()

		sx := float64(100)
		sy := float64(250)

		stash.BeginDraw()

		dx := sx
		dy := sy
		dx = stash.DrawText(clearSansRegular, 24, dx, dy, "The quick ", [4]float32{0, 0, 0, 1})
		dx = stash.DrawText(clearSansItalic, 48, dx, dy, "brown ", [4]float32{1, 1, 0.5, 1})
		dx = stash.DrawText(clearSansRegular, 24, dx, dy, "fox ", [4]float32{0, 1, 0.5, 1})
		_, _, lh := stash.VMetrics(clearSansItalic, 24)
		dx = sx
		dy -= lh * 1.2
		dx = stash.DrawText(clearSansItalic, 24, dx, dy, "jumps over ", [4]float32{0, 1, 1, 1})
		dx = stash.DrawText(clearSansBold, 24, dx, dy, "the lazy ", [4]float32{1, 0, 1, 1})
		dx = stash.DrawText(clearSansRegular, 24, dx, dy, "dog.", [4]float32{0, 1, 0, 1})
		dx = sx
		dy -= lh * 1.2
		dx = stash.DrawText(clearSansRegular, 12, dx, dy, "Now is the time for all good men to come to the aid of the party.", [4]float32{0, 0, 1, 1})
		_, _, lh = stash.VMetrics(clearSansItalic, 12)
		dx = sx
		dy -= lh * 1.2 * 2
		dx = stash.DrawText(clearSansItalic, 18, dx, dy, "Ég get etið gler án þess að meiða mig.", [4]float32{1, 0, 0, 1})
		_, _, lh = stash.VMetrics(clearSansItalic, 18)
		dx = sx
		dy -= lh * 1.2
		stash.DrawText(droidJapanese, 18, dx, dy, "どこかに置き忘れた、サングラスと打ち明け話。", [4]float32{1, 1, 1, 1})

		stash.EndDraw()
		gl.Enable(gl.DEPTH_TEST)

		window.SwapBuffers()
		glfw.PollEvents()
	}
}
예제 #18
0
func main() {
	if err := glfw.Init(); err != nil {
		fmt.Println("glfw.Init():", err)
		return
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Decorated, glfw.True)
	glfw.WindowHint(glfw.ContextVersionMajor, 1)
	glfw.WindowHint(glfw.ContextVersionMinor, 0)
	glfw.WindowHint(glfw.Resizable, glfw.True)

	window, err := glfw.CreateWindow(10, 10, "Settlers", nil, nil)
	if err != nil {
		fmt.Println("glfw.CreateWindow():", err)
		return
	}
	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		fmt.Println("gl.Init():", err)
		return
	}

	stash := fontstash.New(512, 512)
	fontID, err := stash.AddFont(resourcePath("MorrisRoman-Black.ttf"))
	if err != nil {
		fmt.Println(err)
		return
	}
	stash.SetYInverted(true)
	font := &font{stash, fontID, 35}

	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.MatrixMode(gl.MODELVIEW)
	gl.LoadIdentity()

	rand.Seed(time.Now().UnixNano())
	g := game.New([]game.Color{game.Red, game.White, game.Blue}, rand.Int())

	var lines []string
	window.SetCharCallback(func(_ *glfw.Window, r rune) {
		if len(lines) == 0 {
			lines = []string{""}
		}
		lines[len(lines)-1] += string(r)
	})
	window.SetCharModsCallback(func(_ *glfw.Window, r rune, _ glfw.ModifierKey) {
	})
	window.SetKeyCallback(func(_ *glfw.Window, key glfw.Key, _ int, action glfw.Action, _ glfw.ModifierKey) {
		if action == glfw.Release {
			return
		}
		if key == glfw.KeyEscape {
			window.SetShouldClose(true)
		}
		if key == glfw.Key1 {
			g.CurrentPlayer = 0
		}
		if key == glfw.Key2 {
			g.CurrentPlayer = 1
		}
		if key == glfw.Key3 {
			g.CurrentPlayer = 2
		}
		if key == glfw.Key4 {
			g.CurrentPlayer = 3
		}
		if key == glfw.KeyR {
			state = buildingRoad
		}
		if key == glfw.KeyS {
			state = buildingSettlement
		}
		if key == glfw.KeyKP2 {
			g.DealResources(2)
		}
		if key == glfw.KeyKP3 {
			g.DealResources(3)
		}
		if key == glfw.KeyKP4 {
			g.DealResources(4)
		}
		if key == glfw.KeyKP5 {
			g.DealResources(5)
		}
		if key == glfw.KeyKP6 {
			g.DealResources(6)
		}
		if key == glfw.KeyKP8 {
			g.DealResources(8)
		}
		if key == glfw.KeyKP9 {
			g.DealResources(9)
		}
		if key == glfw.KeyKP0 {
			g.DealResources(10)
		}
		if key == glfw.KeyKP1 {
			g.DealResources(11)
		}
		if key == glfw.KeyKP7 {
			g.DealResources(12)
		}
		if len(lines) > 0 && key == glfw.KeyBackspace && (action == glfw.Press || action == glfw.Repeat) {
			if len(lines[len(lines)-1]) == 0 {
				lines = lines[:len(lines)-1]
			} else {
				lines[len(lines)-1] = removeLastRune(lines[len(lines)-1])
			}
		}
		if (action == glfw.Press || action == glfw.Repeat) &&
			(key == glfw.KeyEnter || key == glfw.KeyKPEnter) {
			lines = append(lines, "")
		}
	})
	window.SetInputMode(glfw.CursorMode, glfw.CursorHidden)
	window.SetInputMode(glfw.CursorMode, glfw.CursorNormal)
	window.SetSizeCallback(func(_ *glfw.Window, w, h int) {
		windowW, windowH = w, h
		cam.WindowWidth, cam.WindowHeight = w, h
		gl.Viewport(0, 0, int32(w), int32(h))
	})

	if err := loadImages(); err != nil {
		fmt.Println(err)
		return
	}

	var background image.Image
	var backImg *glImage
	go func() {
		gameW, gameH := 7*200, 7*tileYOffset+tileSlopeHeight
		back := image.NewRGBA(image.Rect(0, 0, gameW, gameH))
		clearToTransparent(back)
		drawGameBackgroundIntoImage(back, g)
		background = back
	}()

	gameColorToString := func(c game.Color) string {
		switch c {
		case game.Red:
			return "red"
		case game.Orange:
			return "orange"
		case game.Blue:
			return "blue"
		default:
			return "white"
		}
	}

	roadImage := func(pos game.TileEdge, c game.Color) *glImage {
		color := gameColorToString(c)
		dir := "up"
		if isEdgeVertical(pos) {
			dir = "vertical"
		}
		if isEdgeGoingDown(pos) {
			dir = "down"
		}
		return glImages["road_"+color+"_"+dir]
	}

	settlementImage := func(c game.Color) *glImage {
		return glImages["settlement_"+gameColorToString(c)]
	}

	cityImage := func(c game.Color) *glImage {
		return glImages["city_"+gameColorToString(c)]
	}

	// TODO this is for showing the road/settlement being built currently
	var movingSettlementCorner game.TileCorner
	var movingSettlementVisible bool
	var movingRoadEdge game.TileEdge
	var movingRoadVisible bool
	window.SetCursorPosCallback(func(_ *glfw.Window, x, y float64) {
		mouseX, mouseY = x, y
		gameX, gameY := cam.screenToGame(x, y)
		movingSettlementCorner, movingSettlementVisible = screenToCorner(gameX, gameY)
		movingRoadEdge, movingRoadVisible = screenToEdge(gameX, gameY)
	})
	window.SetCursorEnterCallback(func(_ *glfw.Window, entered bool) {
		mouseIn = entered
		if entered == false {
			movingSettlementVisible = false
			movingRoadVisible = true
		}
	})
	//////////////////////////////////////////////////////////////////

	drawGame := func() {
		if backImg == nil && background != nil {
			backImg, _ = NewGLImageFromImage(background)
		}
		if backImg != nil {
			backImg.DrawAtXY(0, 0)

			for _, p := range g.GetPlayers() {
				for _, r := range p.GetBuiltRoads() {
					x, y := edgeToScreen(r.Position)
					img := roadImage(r.Position, p.Color)
					img.DrawAtXY(x-img.Width/2, y-img.Height/2)
				}
				for _, s := range p.GetBuiltSettlements() {
					x, y := cornerToScreen(s.Position)
					img := settlementImage(p.Color)
					img.DrawAtXY(x-img.Width/2, y-(5*img.Height/8))
				}
				for _, c := range p.GetBuiltCities() {
					x, y := cornerToScreen(c.Position)
					img := cityImage(p.Color)
					img.DrawAtXY(x-img.Width/2, y-(5*img.Height/8))
				}
			}

			if state == buildingSettlement && movingSettlementVisible && mouseIn {
				color := [4]float32{1, 1, 1, 1}
				x, y := cornerToScreen(movingSettlementCorner)
				if !movingSettlementVisible || !g.CanBuildSettlementAt(movingSettlementCorner) {
					color = [4]float32{0.7, 0.7, 0.7, 0.7}
					x, y = cam.screenToGame(mouseX, mouseY)
				}
				img := settlementImage(g.GetCurrentPlayer().Color)
				// TODO duplicate code:
				img.DrawColoredAtXY(x-img.Width/2, y-(5*img.Height/8), color)
			}
			if state == buildingRoad && movingRoadVisible && mouseIn {
				color := [4]float32{1, 1, 1, 1}
				x, y := edgeToScreen(movingRoadEdge)
				if !(!movingRoadVisible || !g.CanBuildRoadAt(movingRoadEdge)) {
					img := roadImage(movingRoadEdge, g.GetCurrentPlayer().Color)
					// TODO duplicate code:
					img.DrawColoredAtXY(x-img.Width/2, y-(5*img.Height/8), color)
				}
			}

			x, y, w, h := tileToScreen(g.Robber.Position)
			robber := glImages["robber"]
			robber.DrawAtXY(x+(w-robber.Width)/2, y+(h-robber.Height)/2)
		}
	}

	buildMenu := &menu{color{0.5, 0.4, 0.8, 0.9}, rect{0, 500, 800, 250}}

	showCursor := 0
	start := time.Now()
	frames := 0

	window.SetSize(windowW, windowH)

	for !window.ShouldClose() {
		glfw.PollEvents()

		gl.MatrixMode(gl.PROJECTION)
		gl.LoadIdentity()
		const controlsHeight = 0 // TODO reserve are for stats and menus
		gameW, gameH := 7.0*200, 7.0*tileYOffset+tileSlopeHeight+controlsHeight
		gameRatio := gameW / gameH
		windowRatio := float64(windowW) / float64(windowH)
		var left, right, bottom, top float64
		if windowRatio > gameRatio {
			// window is wider than game => borders left and right
			border := (windowRatio*gameH - gameW) / 2
			left, right = -border, border+gameW
			bottom, top = gameH, 0
		} else {
			// window is higher than game => borders on top and bottom
			border := (gameW/windowRatio - gameH) / 2
			left, right = 0, gameW
			bottom, top = gameH+border, -border
		}
		gl.Ortho(left, right, bottom, top, -1, 1)
		cam.Left, cam.Right, cam.Bottom, cam.Top = left, right, bottom, top
		gl.ClearColor(0, 0, 1, 1)
		gl.Clear(gl.COLOR_BUFFER_BIT)

		drawGame()

		lines = make([]string, g.PlayerCount*6)
		for i, player := range g.GetPlayers() {
			lines[i*6+0] = fmt.Sprintf("player %v has %v ore", i+1, player.Resources[game.Ore])
			lines[i*6+1] = fmt.Sprintf("player %v has %v grain", i+1, player.Resources[game.Grain])
			lines[i*6+2] = fmt.Sprintf("player %v has %v lumber", i+1, player.Resources[game.Lumber])
			lines[i*6+3] = fmt.Sprintf("player %v has %v wool", i+1, player.Resources[game.Wool])
			lines[i*6+4] = fmt.Sprintf("player %v has %v brick", i+1, player.Resources[game.Brick])
		}

		if len(lines) > 0 {
			stash.BeginDraw()
			const fontSize = 35
			const cursorText = "" //"_"
			cursor := ""
			if showCursor > 60 {
				cursor = cursorText
			}
			for i, line := range lines {
				output := line
				if i == len(lines)-1 {
					output += cursor
				}
				font.Write(output, 0, float64(i+1)*fontSize)
			}
			if len(lines) == 0 {
				font.Write(cursor, 0, fontSize)
			}
			stash.EndDraw()
		}

		buildMenu.draw()

		window.SwapBuffers()

		showCursor = (showCursor + 1) % 120
		frames++
		if time.Now().Sub(start).Seconds() >= 1.0 {
			fmt.Println(frames, "fps")
			frames = 0
			start = time.Now()
		}
	}
}
예제 #19
0
파일: gg.go 프로젝트: dmac/gg
func (*backend) BlendFunc(sfactor, dfactor gg.Enum) {
	gl.BlendFunc(uint32(sfactor), uint32(dfactor))
}
예제 #20
0
파일: main.go 프로젝트: rexposadas/gx
func main() {
	if err := glfw.Init(nopContextWatcher{}); err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Samples, 8) // Anti-aliasing.

	window, err := glfw.CreateWindow(400, 400, "", nil, nil)
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		panic(err)
	}

	glfw.SwapInterval(1) // Vsync.

	InitFont()
	defer DeinitFont()

	framebufferSizeCallback := func(w *glfw.Window, framebufferSize0, framebufferSize1 int) {
		gl.Viewport(0, 0, int32(framebufferSize0), int32(framebufferSize1))

		var windowSize [2]int
		windowSize[0], windowSize[1] = w.GetSize()

		// Update the projection matrix.
		gl.MatrixMode(gl.PROJECTION)
		gl.LoadIdentity()
		gl.Ortho(0, float64(windowSize[0]), float64(windowSize[1]), 0, -1, 1)
		gl.MatrixMode(gl.MODELVIEW)
	}
	{
		var framebufferSize [2]int
		framebufferSize[0], framebufferSize[1] = window.GetFramebufferSize()
		framebufferSizeCallback(window, framebufferSize[0], framebufferSize[1])
	}
	window.SetFramebufferSizeCallback(framebufferSizeCallback)

	var inputEventQueue []events.InputEvent
	mousePointer = &events.Pointer{VirtualCategory: events.POINTING}

	window.SetMouseMovementCallback(func(w *glfw.Window, xpos, ypos, xdelta, ydelta float64) {
		inputEvent := events.InputEvent{
			Pointer:    mousePointer,
			EventTypes: map[events.EventType]struct{}{events.SLIDER_EVENT: {}},
			InputId:    0,
			Buttons:    nil,
			Sliders:    []float64{xdelta, ydelta},
		}
		if w.GetInputMode(glfw.CursorMode) != glfw.CursorDisabled {
			inputEvent.EventTypes[events.AXIS_EVENT] = struct{}{}
			inputEvent.Axes = []float64{xpos, ypos}
		}
		inputEventQueue = events.EnqueueInputEvent(inputEventQueue, inputEvent)
	})

	window.SetMouseButtonCallback(func(w *glfw.Window, button glfw.MouseButton, action glfw.Action, mods glfw.ModifierKey) {
		inputEvent := events.InputEvent{
			Pointer:     mousePointer,
			EventTypes:  map[events.EventType]struct{}{events.BUTTON_EVENT: {}},
			InputId:     uint16(button),
			Buttons:     []bool{action != glfw.Release},
			Sliders:     nil,
			Axes:        nil,
			ModifierKey: uint8(mods),
		}
		inputEventQueue = events.EnqueueInputEvent(inputEventQueue, inputEvent)
	})

	go func() {
		<-time.After(5 * time.Second)
		log.Println("trigger!")
		boxUpdated = true

		glfw.PostEmptyEvent()
	}()

	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA) // For font.

	gl.ClearColor(247.0/255, 247.0/255, 247.0/255, 1)

	var spinner int

	var widgets []events.Widgeter

	widgets = append(widgets, NewButtonWidget(mgl64.Vec2{50, 200}, func() { fmt.Println("button triggered") }))

	for !window.ShouldClose() && glfw.Press != window.GetKey(glfw.KeyEscape) {
		glfw.WaitEvents()

		// Process Input.
		inputEventQueue = events.ProcessInputEventQueue(inputEventQueue, widgets[0])

		gl.Clear(gl.COLOR_BUFFER_BIT)
		gl.LoadIdentity()

		for _, widget := range widgets {
			widget.Render()
		}

		drawSpinner(spinner)
		spinner++

		drawBox()

		gl.Color3d(1, 0, 0)
		NewOpenGlStream(mgl64.Vec2{50, 300}).PrintText(` !"#$%&'()*+,-./
0123456789:;<=>?
@ABCDEFGHIJKLMNO
PQRSTUVWXYZ[\]^_
` + "`" + `abcdefghijklmno
pqrstuvwxyz{|}~`)

		window.SwapBuffers()
		log.Println("swapped buffers")

		//runtime.Gosched()
	}
}
// OpenGL draw function
func draw(window *glfw.Window) {
	gl.Clear(gl.COLOR_BUFFER_BIT)
	gl.Enable(gl.BLEND)
	gl.Enable(gl.POINT_SMOOTH)
	gl.Enable(gl.LINE_SMOOTH)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	gl.LoadIdentity()

	gl.PushMatrix()

	gl.Disable(gl.LIGHTING)

	width, height := window.GetSize()
	x := float64(width)
	y := float64(height)
	h := 0

	gl.Color4f(.1, .1, .1, .8)
	gl.LineWidth(1.0)

	// x方向
	var x0, x1, y0, y1 float64
	var deltaX, deltaY float64
	d := width / 2

	x0 = -x
	x1 = -x
	y0 = -y
	y1 = y
	deltaX = ((2 * x) / float64(d))

	for i := 0; i < d; i++ {
		x0 = x0 + deltaX
		gl.Begin(gl.LINES)
		gl.Vertex3f(float32(x0), float32(y0), float32(h))
		gl.Vertex3f(float32(x0), float32(y1), float32(h))
		gl.End()
	}

	// y方向
	x0 = -x
	x1 = x
	deltaY = ((2 * y) / float64(d))

	for i := 0; i < d; i++ {
		y0 = y0 + deltaY
		gl.Begin(gl.LINES)
		gl.Vertex3f(float32(x0), float32(y0), float32(h))
		gl.Vertex3f(float32(x1), float32(y0), float32(h))
		gl.End()
	}

	gl.PopMatrix()

	// draw boxes
	for _, room := range rooms {
		gl.PushMatrix()
		rot := room.Box.Body.Angle() * chipmunk.DegreeConst
		gl.Rotatef(float32(rot), 0, 0, 1.0)
		x := roundm(float64(room.Box.Body.Position().X), 4.0)
		y := roundm(float64(room.Box.Body.Position().Y), 4.0)
		gl.Translated(x, y, 0.0)
		drawRoom(room)
		gl.PopMatrix()
	}
}
예제 #22
0
파일: main.go 프로젝트: mantyr/wolfengo
func main() {
	fmt.Printf(`WolfenGo v%s, Copyright (C) 2016 gdm85
https://github.com/gdm85/wolfengo
WolfenGo comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under GNU/GPLv2 license.`+"\n", version)

	if err := glfw.Init(); err != nil {
		fatalError(err)
	}
	defer glfw.Terminate()

	// create a context and activate it
	glfw.WindowHint(glfw.ContextVersionMajor, 2)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)
	glfw.WindowHint(glfw.Resizable, glfw.False)
	glfw.WindowHint(glfw.DoubleBuffer, glfw.True)
	var err error
	Window, err = glfw.CreateWindow(800, 600, "WolfenGo", nil, nil)
	if err != nil {
		fatalError(err)
	}
	Window.MakeContextCurrent()

	// gl.Init() should be called after context is current
	if err := gl.Init(); err != nil {
		fatalError(err)
	}

	glfw.SwapInterval(1) // enable vertical refresh

	fmt.Println(gl.GoStr(gl.GetString(gl.VERSION)))

	if debugGL {
		gl.DebugMessageCallback(debugCb, unsafe.Pointer(nil))
		gl.Enable(gl.DEBUG_OUTPUT)
	}

	// init graphics
	gl.ClearColor(0.0, 0.0, 0.0, 0.0)

	gl.FrontFace(gl.CW)
	gl.CullFace(gl.BACK)
	gl.Enable(gl.CULL_FACE)
	gl.Enable(gl.DEPTH_TEST)

	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	gl.Enable(gl.DEPTH_CLAMP)
	gl.Enable(gl.TEXTURE_2D)

	isRunning := false

	// load all assets
	_, err = getBasicShader()
	if err != nil {
		fatalError(err)
	}
	err = _defaultMedkit.initMedkit()
	if err != nil {
		fatalError(err)
	}
	err = _defaultMonster.initMonster()
	if err != nil {
		fatalError(err)
	}
	getDoorMesh()
	initPlayer()
	err = initGun()
	if err != nil {
		fatalError(err)
	}

	G, err = NewGame()
	if err != nil {
		fatalError(err)
	}

	// GAME STARTS
	isRunning = true

	var frames uint64
	var frameCounter time.Duration

	frameTime := time.Duration(1000/frameCap) * time.Millisecond
	lastTime := time.Now()
	var unprocessedTime time.Duration

	for isRunning {
		var render bool

		startTime := time.Now()
		passedTime := startTime.Sub(lastTime)
		lastTime = startTime

		unprocessedTime += passedTime
		frameCounter += passedTime

		for unprocessedTime > frameTime {
			render = true

			unprocessedTime -= frameTime
			if Window.ShouldClose() {
				isRunning = false
			}
			G.timeDelta = frameTime.Seconds()

			glfw.PollEvents()
			err := G.input()
			if err != nil {
				fatalError(err)
			}
			err = G.update()
			if err != nil {
				fatalError(err)
			}

			if frameCounter >= time.Second {
				if printFPS {
					fmt.Printf("%d FPS\n", frames)
				}
				frames = 0
				frameCounter -= time.Second
			}
		}

		if render {
			//TODO: Stencil Buffer
			gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

			G.render()
			frames++
			Window.SwapBuffers()
		} else {
			time.Sleep(time.Millisecond)
		}
	}

	Window.Destroy()
}
예제 #23
0
파일: Window.go 프로젝트: XO-Lib/GCXO
func (w *Window) Show() {
	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.Resizable, glfw.True)

	window, err := glfw.CreateWindow(w.W, w.H, w.Title, nil, nil)
	if err != nil {
		panic(err)
	}

	if err := gl.Init(); err != nil {
		panic(err)
	}

	window.MakeContextCurrent()

	if len(w.Icon) == 1 {
		window.SetIcon(w.Icon)

	}

	if w.RestrictionsEnabled {
		window.SetSizeLimits(w.MinW, w.MinH, w.MaxW, w.MaxH)
	}

	if w.Blend {
		gl.Enable(gl.BLEND)
		gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
	} else if w.Smooth {
		gl.Enable(gl.SMOOTH)
		gl.Enable(gl.POINT_SMOOTH)
		gl.Enable(gl.LINE_SMOOTH)
		gl.Enable(gl.POLYGON_SMOOTH)
		gl.Enable(gl.RELATIVE_SMOOTH_CUBIC_CURVE_TO_NV)
		gl.Enable(gl.RELATIVE_SMOOTH_QUADRATIC_CURVE_TO_NV)
	} else if w.Multisample {
		gl.Enable(gl.MULTISAMPLE)
	}

	reshape(w.W, w.H)
	window.SetRefreshCallback(func(g *glfw.Window) { reshape(w.W, w.H) })
	window.SetSizeCallback(func(g *glfw.Window, width int, height int) {
		reshape(width, height)
		w.W = width
		w.H = height
	})
	version := gl.GoStr(gl.GetString(gl.VERSION))
	if !silentMode {
		fmt.Println("OpenGL version", version)
	}

	for !window.ShouldClose() {
		//Reset?
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

		if w.DrawFunc != nil {
			w.DrawFunc()
		}
		// Maintenance
		gl.Flush()
		window.SwapBuffers()
		glfw.PollEvents()
	}
}
예제 #24
0
파일: gl_opengl.go 프로젝트: tanema/amore
// BlendFunc sets the pixel blending factors.
//
// http://www.khronos.org/opengles/sdk/docs/man3/html/glBlendFunc.xhtml
func BlendFunc(sfactor, dfactor Enum) {
	gl.BlendFunc(uint32(sfactor), uint32(dfactor))
}
예제 #25
0
파일: font.go 프로젝트: go-gl/gltext
// Printf draws the given string at the specified coordinates.
// It expects the string to be a single line. Line breaks are not
// handled as line breaks and are rendered as glyphs.
//
// In order to render multi-line text, it is up to the caller to split
// the text up into individual lines of adequate length and then call
// this method for each line seperately.
func (f *Font) Printf(x, y float32, fs string, argv ...interface{}) error {
	indices := []rune(fmt.Sprintf(fs, argv...))

	if len(indices) == 0 {
		return nil
	}

	// Runes form display list indices.
	// For this purpose, they need to be offset by -FontConfig.Low
	low := f.config.Low
	for i := range indices {
		indices[i] -= low
	}

	var vp [4]int32
	gl.GetIntegerv(gl.VIEWPORT, &vp[0])

	gl.PushAttrib(gl.TRANSFORM_BIT)
	gl.MatrixMode(gl.PROJECTION)
	gl.PushMatrix()
	gl.LoadIdentity()
	gl.Ortho(float64(vp[0]), float64(vp[2]), float64(vp[1]), float64(vp[3]), 0, 1)
	gl.PopAttrib()

	gl.PushAttrib(gl.LIST_BIT | gl.CURRENT_BIT | gl.ENABLE_BIT | gl.TRANSFORM_BIT)
	{
		gl.MatrixMode(gl.MODELVIEW)
		gl.Disable(gl.LIGHTING)
		gl.Disable(gl.DEPTH_TEST)
		gl.Enable(gl.BLEND)
		gl.Enable(gl.TEXTURE_2D)

		gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
		gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
		gl.BindTexture(gl.TEXTURE_2D, f.texture)
		gl.ListBase(f.listbase)

		var mv [16]float32
		gl.GetFloatv(gl.MODELVIEW_MATRIX, &mv[0])

		gl.PushMatrix()
		{
			gl.LoadIdentity()

			mgw := float32(f.maxGlyphWidth)
			mgh := float32(f.maxGlyphHeight)

			switch f.config.Dir {
			case LeftToRight, TopToBottom:
				gl.Translatef(x, float32(vp[3])-y-mgh, 0)
			case RightToLeft:
				gl.Translatef(x-mgw, float32(vp[3])-y-mgh, 0)
			}

			gl.MultMatrixf(&mv[0])
			gl.CallLists(int32(len(indices)), gl.UNSIGNED_INT, unsafe.Pointer(&indices[0]))
		}
		gl.PopMatrix()
		gl.BindTexture(gl.TEXTURE_2D, 0)
	}
	gl.PopAttrib()

	gl.PushAttrib(gl.TRANSFORM_BIT)
	gl.MatrixMode(gl.PROJECTION)
	gl.PopMatrix()
	gl.PopAttrib()
	return checkGLError()
}