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장길석님이 작성하신 framebuffer 용 초소형 그래픽 라이브러리

install in i386

dependency

  • zlib 라이브러리 설치 : zlib1g-dev
  • jpeg 라이브러리 설치 : libjpeg62-dev
  • png 라이브러리 설치 : libpng12-dev
$ sudo apt-get install zlib1g-dev libjpeg62-dev libpng12-dev

mmap practice

#!/usr/bin/python
 
import mmap
fbfp = open("/tmp/fbe_buffer", "rw+")
map = mmap.mmap(fbfp.fileno(), 0)
 
for i in range (640, 640*3):
    map[i] = chr(80)
 
map.flush()
map.close()

wxScrolledWindow practice

import  wx
import  images
 
BUFFERED = 1
 
#---------------------------------------------------------------------------
 
class MyCanvas(wx.ScrolledWindow):
    def __init__(self, parent, id = -1, size = wx.DefaultSize):
        wx.ScrolledWindow.__init__(self, parent, id, (0, 0), size=size, style=wx.SUNKEN_BORDER)
 
        self.lines = []
        self.maxWidth  = 1000
        self.maxHeight = 1000
        self.x = self.y = 0
        self.curLine = []
        self.drawing = False
 
        self.SetBackgroundColour("WHITE")
        self.SetCursor(wx.StockCursor(wx.CURSOR_PENCIL))
        bmp = images.Test2.GetBitmap()
        mask = wx.Mask(bmp, wx.BLUE)
        bmp.SetMask(mask)
        self.bmp = bmp
 
        self.SetVirtualSize((self.maxWidth, self.maxHeight))
        self.SetScrollRate(20,20)
 
        if BUFFERED:
            # Initialize the buffer bitmap.  No real DC is needed at this point.
            self.buffer = wx.EmptyBitmap(self.maxWidth, self.maxHeight)
            dc = wx.BufferedDC(None, self.buffer)
            dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
            dc.Clear()
            self.DoDrawing(dc)
 
        self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftButtonEvent)
        self.Bind(wx.EVT_LEFT_UP,   self.OnLeftButtonEvent)
        self.Bind(wx.EVT_MOTION,    self.OnLeftButtonEvent)
        self.Bind(wx.EVT_PAINT, self.OnPaint)
 
 
    def getWidth(self):
        return self.maxWidth
 
    def getHeight(self):
        return self.maxHeight
 
 
    def OnPaint(self, event):
        if BUFFERED:
            # Create a buffered paint DC.  It will create the real
            # wx.PaintDC and then blit the bitmap to it when dc is
            # deleted.  Since we don't need to draw anything else
            # here that's all there is to it.
            dc = wx.BufferedPaintDC(self, self.buffer, wx.BUFFER_VIRTUAL_AREA)
        else:
            dc = wx.PaintDC(self)
            self.PrepareDC(dc)
            # since we're not buffering in this case, we have to
            # paint the whole window, potentially very time consuming.
            self.DoDrawing(dc)
 
 
    def DoDrawing(self, dc, printing=False):
        dc.BeginDrawing()
        dc.SetPen(wx.Pen('RED'))
        dc.DrawRectangle(5, 5, 50, 50)
 
        dc.SetBrush(wx.LIGHT_GREY_BRUSH)
        dc.SetPen(wx.Pen('BLUE', 4))
        dc.DrawRectangle(15, 15, 50, 50)
 
        dc.SetFont(wx.Font(14, wx.SWISS, wx.NORMAL, wx.NORMAL))
        dc.SetTextForeground(wx.Colour(0xFF, 0x20, 0xFF))
        te = dc.GetTextExtent("Hello World")
        dc.DrawText("Hello World", 60, 65)
 
        dc.SetPen(wx.Pen('VIOLET', 4))
        dc.DrawLine(5, 65+te[1], 60+te[0], 65+te[1])
 
        lst = [(100,110), (150,110), (150,160), (100,160)]
        dc.DrawLines(lst, -60)
        dc.SetPen(wx.GREY_PEN)
        dc.DrawPolygon(lst, 75)
        dc.SetPen(wx.GREEN_PEN)
        dc.DrawSpline(lst+[(100,100)])
 
        dc.DrawBitmap(self.bmp, 200, 20, True)
        dc.SetTextForeground(wx.Colour(0, 0xFF, 0x80))
        dc.DrawText("a bitmap", 200, 85)
 
##         dc.SetFont(wx.Font(14, wx.SWISS, wx.NORMAL, wx.NORMAL))
##         dc.SetTextForeground("BLACK")
##         dc.DrawText("TEST this STRING", 10, 200)
##         print dc.GetFullTextExtent("TEST this STRING")
 
        font = wx.Font(20, wx.SWISS, wx.NORMAL, wx.NORMAL)
        dc.SetFont(font)
        dc.SetTextForeground(wx.BLACK)
 
        for a in range(0, 360, 45):
            dc.DrawRotatedText("Rotated text...", 300, 300, a)
 
        dc.SetPen(wx.TRANSPARENT_PEN)
        dc.SetBrush(wx.BLUE_BRUSH)
        dc.DrawRectangle(50,500, 50,50)
        dc.DrawRectangle(100,500, 50,50)
 
        dc.SetPen(wx.Pen('RED'))
        dc.DrawEllipticArc(200,500, 50,75, 0, 90)
 
        if not printing:
            # This has troubles when used on a print preview in wxGTK,
            # probably something to do with the pen styles and the scaling
            # it does...
            y = 20
 
            for style in [wx.DOT, wx.LONG_DASH, wx.SHORT_DASH, wx.DOT_DASH, wx.USER_DASH]:
                pen = wx.Pen("DARK ORCHID", 1, style)
                if style == wx.USER_DASH:
                    pen.SetCap(wx.CAP_BUTT)
                    pen.SetDashes([1,2])
                    pen.SetColour("RED")
                dc.SetPen(pen)
                dc.DrawLine(300,y, 400,y)
                y = y + 10
 
        dc.SetBrush(wx.TRANSPARENT_BRUSH)
        dc.SetPen(wx.Pen(wx.Colour(0xFF, 0x20, 0xFF), 1, wx.SOLID))
        dc.DrawRectangle(450,50,  100,100)
        old_pen = dc.GetPen()
        new_pen = wx.Pen("BLACK", 5)
        dc.SetPen(new_pen)
        dc.DrawRectangle(470,70,  60,60)
        dc.SetPen(old_pen)
        dc.DrawRectangle(490,90, 20,20)
 
        dc.GradientFillLinear((20, 260, 50, 50),
                              "red", "blue")
        dc.GradientFillConcentric((20, 325, 50, 50),
                                  "red", "blue", (25,25))
        self.DrawSavedLines(dc)
        dc.EndDrawing()
 
 
    def DrawSavedLines(self, dc):
        dc.SetPen(wx.Pen('MEDIUM FOREST GREEN', 4))
 
        for line in self.lines:
            for coords in line:
                apply(dc.DrawLine, coords)
 
 
    def SetXY(self, event):
        self.x, self.y = self.ConvertEventCoords(event)
 
    def ConvertEventCoords(self, event):
        newpos = self.CalcUnscrolledPosition(event.GetX(), event.GetY())
        return newpos
 
    def OnLeftButtonEvent(self, event):
        if event.LeftDown():
            self.SetFocus()
            self.SetXY(event)
            self.curLine = []
            self.CaptureMouse()
            self.drawing = True
 
        elif event.Dragging() and self.drawing:
            if BUFFERED:
                # If doing buffered drawing we'll just update the
                # buffer here and then refresh that portion of the
                # window, then that portion of the buffer will be
                # redrawn in the EVT_PAINT handler.
                dc = wx.BufferedDC(None, self.buffer)
            else:
                # otherwise we'll draw directly to a wx.ClientDC
                dc = wx.ClientDC(self)
                self.PrepareDC(dc)
 
            dc.SetPen(wx.Pen('MEDIUM FOREST GREEN', 4))
            coords = (self.x, self.y) + self.ConvertEventCoords(event)
            self.curLine.append(coords)
            dc.DrawLine(*coords)
            self.SetXY(event)
 
            if BUFFERED:
                # figure out what part of the window to refresh
                x1,y1, x2,y2 = dc.GetBoundingBox()
                x1,y1 = self.CalcScrolledPosition(x1, y1)
                x2,y2 = self.CalcScrolledPosition(x2, y2)
                # make a rectangle
                rect = wx.Rect()
                rect.SetTopLeft((x1,y1))
                rect.SetBottomRight((x2,y2))
                rect.Inflate(2,2)
                # refresh it
                self.RefreshRect(rect)
 
        elif event.LeftUp() and self.drawing:
            self.lines.append(self.curLine)
            self.curLine = []
            self.ReleaseMouse()
            self.drawing = False
 
 
## This is an example of what to do for the EVT_MOUSEWHEEL event,
## but since wx.ScrolledWindow does this already it's not
## necessary to do it ourselves. You would need to add an event table 
## entry to __init__() to direct wheelmouse events to this handler.
 
##     wheelScroll = 0
##     def OnWheel(self, evt):
##         delta = evt.GetWheelDelta()
##         rot = evt.GetWheelRotation()
##         linesPer = evt.GetLinesPerAction()
##         print delta, rot, linesPer
##         ws = self.wheelScroll
##         ws = ws + rot
##         lines = ws / delta
##         ws = ws - lines * delta
##         self.wheelScroll = ws
##         if lines != 0:
##             lines = lines * linesPer
##             vsx, vsy = self.GetViewStart()
##             scrollTo = vsy - lines
##             self.Scroll(-1, scrollTo)
 
#---------------------------------------------------------------------------
 
def runTest(frame, nb, log):
    win = MyCanvas(nb)
    return win
 
#---------------------------------------------------------------------------
 
overview = """
<html>
<body>
The wx.ScrolledWindow class manages scrolling for its client area, transforming the 
coordinates according to the scrollbar positions, and setting the scroll positions, 
thumb sizes and ranges according to the area in view.
</body>
</html>
"""
 
 
if __name__ == '__main__':
    import sys,os
    import run
    run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
  • wxDC::DrawBitmap
  • wxBitmapFromBits(bits, width, height, depth=-1)

references

bterm

$ sudo apt-get install bogl-bterm
$ sudo apt-get install libbogl-dev
...
$ bdftobogl -b gulim.bdf >gulim.bgf
$ bterm -f gulim.bgf 
bogl: opening /dev/fb0: No such file or directory
gxlib.1251079904.txt.gz · Last modified: 2013/08/03 05:04 (external edit)