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()
}
}
func (back *glbackend) Stroke(b Bounds) {
gl.Color4ub(back.current.fore.RGBA())
gl.Begin(gl.LINE_LOOP)
{
gl.Vertex2f(b.Min.X, b.Min.Y)
gl.Vertex2f(b.Max.X, b.Min.Y)
gl.Vertex2f(b.Max.X, b.Max.Y)
gl.Vertex2f(b.Min.X, b.Max.Y)
}
gl.End()
}
func (back *glbackend) Fill(b Bounds) {
gl.Color4ub(back.current.back.RGBA())
gl.Begin(gl.QUADS)
{
gl.Vertex2f(b.Min.X, b.Min.Y)
gl.Vertex2f(b.Max.X, b.Min.Y)
gl.Vertex2f(b.Max.X, b.Max.Y)
gl.Vertex2f(b.Min.X, b.Max.Y)
}
gl.End()
}
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()
}
}
func (back *glbackend) Text(text string, bounds Bounds) {
gl.Color4ub(back.current.fontColor.RGBA())
back.atlas.Draw(text, bounds)
}