有一個這樣的例子。我怎麼能用gtk和haskell做2d雙緩衝。我想將原語渲染到屏幕外的緩衝區並翻轉。這段代碼只渲染一個像素/矩形。我想使用雙緩衝方法添加移動。Haskell GTK,雙緩衝與原語
import Graphics.UI.Gtk
import Graphics.UI.Gtk.Gdk.GC
import Graphics.UI.Gtk hiding (Color, Point, Object)
defaultFgColor :: Color
defaultFgColor = Color 65535 65535 65535
defaultBgColor :: Color
defaultBgColor = Color 0 0 0
renderScene d ev = do
dw <- widgetGetDrawWindow d
(w, h) <- widgetGetSize d
gc <- gcNew dw
let fg = Color (round (65535 * 205))
(round (65535 * 0))
(round (65535 * 0))
gcSetValues gc $ newGCValues { foreground = fg }
drawPoint dw gc (120, 120)
drawPoint dw gc (22, 22)
drawRectangle dw gc True 20 20 20 20
return True
main :: IO()
main = do
initGUI
window <- windowNew
drawing <- drawingAreaNew
windowSetTitle window "Cells"
containerAdd window drawing
let bg = Color (round (65535 * 205))
(round (65535 * 205))
(round (65535 * 255))
widgetModifyBg drawing StateNormal bg
onExpose drawing (renderScene drawing)
onDestroy window mainQuit
windowSetDefaultSize window 800 600
windowSetPosition window WinPosCenter
widgetShowAll window
mainGUI
你能告訴我,什麼不適合你嗎? – fuz 2011-03-13 15:34:46
該代碼只渲染一個像素。我想使用雙緩衝方法添加移動。 – 2011-03-14 17:31:27