func (s *Display) init(title string, screenSizeMultiplier int) error {
s.Name = PREFIX + "-SCREEN"
log.Printf("%s: Initialising display", s.Name)
var err error
s.ScreenSizeMultiplier = screenSizeMultiplier
log.Printf("%s: Set screen size multiplier to %dx", s.Name, s.ScreenSizeMultiplier)
glfw.OpenWindowHint(glfw.WindowNoResize, 1)
err = glfw.OpenWindow(SCREEN_WIDTH*s.ScreenSizeMultiplier, SCREEN_HEIGHT*s.ScreenSizeMultiplier, 0, 0, 0, 0, 0, 0, glfw.Windowed)
if err != nil {
return err
}
glfw.SetWindowTitle(title)
//resize function
onResize := func(w, h int) {
gl.Viewport(0, 0, w, h)
gl.MatrixMode(gl.PROJECTION)
gl.LoadIdentity()
gl.Ortho(0, float64(w), float64(h), 0, -1, 1)
gl.ClearColor(0.255, 0.255, 0.255, 0)
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.MatrixMode(gl.MODELVIEW)
gl.LoadIdentity()
}
glfw.SetWindowSizeCallback(onResize)
desktopMode := glfw.DesktopMode()
glfw.SetWindowPos((desktopMode.W-SCREEN_WIDTH*s.ScreenSizeMultiplier)/2, (desktopMode.H-SCREEN_HEIGHT*s.ScreenSizeMultiplier)/2)
gl.ClearColor(0.255, 0.255, 0.255, 0)
return nil
}
func (w *glfwBackend) Open(width, height, zoom int, fs bool, font *FontData) {
if err := glfw.Init(); err != nil {
panic(err)
}
w.font = font
w.zoom = zoom
w.width = width
w.height = height
var fwidth = width * font.CellWidth * zoom
var fheight = height * font.CellHeight * zoom
var twidth = fwidth
var theight = fheight
flag := glfw.Windowed
if fs {
flag = glfw.Fullscreen
dm := glfw.DesktopMode()
twidth = dm.W
theight = dm.H
}
glfw.OpenWindowHint(glfw.WindowNoResize, gl.TRUE)
err := glfw.OpenWindow(twidth, theight, 8, 8, 8, 8, 0, 0, flag)
if err != nil {
panic(err)
}
w.key = NOKEY
glfw.SetWindowCloseCallback(func() int { w.Close(); return 0 })
glfw.SetKeyCallback(func(key, state int) { w.setKey(key, state) })
glfw.SetCharCallback(func(key, state int) { w.setKey(key, state) })
glfw.Enable(glfw.KeyRepeat)
w.mouse = new(MouseData)
glfw.Enable(glfw.MouseCursor)
glfw.SetMousePosCallback(func(x, y int) { w.mouseMove(x, y) })
glfw.SetMouseButtonCallback(func(but, state int) { w.mousePress(but, state) })
glfw.Enable(glfw.MouseCursor)
xoff := float32(twidth-fwidth) / 2.0
yoff := float32(theight-fheight) / 2.0
fc := float32(font.CellWidth * zoom)
fch := float32(font.CellHeight * zoom)
for y := 0; y < height; y++ {
for x := 0; x < width; x++ {
cx := xoff + float32(x)*fc
cy := yoff + float32(y)*fch
w.verts = append(w.verts, cx, cy, cx, cy+fch, cx+fc, cy+fch, cx+fc, cy)
}
}
runtime.LockOSThread()
glInit(twidth, theight)
m := font.Image.(*image.RGBA)
w.s = float32(font.CellWidth) / float32(m.Bounds().Max.X)
w.t = float32(font.CellHeight) / float32(m.Bounds().Max.Y)
textures = make([]gl.Uint, 2)
gl.GenTextures(2, &textures[0])
gl.BindTexture(gl.TEXTURE_2D, textures[0])
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(m.Bounds().Max.X), gl.Sizei(m.Bounds().Max.Y), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Pointer(&m.Pix[0]))
m = image.NewRGBA(image.Rect(0, 0, font.CellWidth, font.CellHeight))
draw.Draw(m, m.Bounds(), &image.Uniform{White}, image.ZP, draw.Src)
gl.BindTexture(gl.TEXTURE_2D, textures[1])
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(m.Bounds().Max.X), gl.Sizei(m.Bounds().Max.Y), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Pointer(&m.Pix[0]))
w.open = true
}