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Add raw bitmap access sample to the demo

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40860 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robin Dunn
2006-08-27 09:11:47 +00:00
parent 5e26ba70aa
commit ecc0e221ee
3 changed files with 83 additions and 2 deletions
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2
wxPython/demo/BitmapFromBuffer.py
View File

@@ -77,7 +77,7 @@ class TestPanel(wx.Panel):
# Make a bitmap using an array of RGB bytes plus a separate
# buffer for the alpha channel
bpp = 3 # bytes per pixel
bytes = array.array('B', [1,2,3] * width*height)#*bpp)
bytes = array.array('B', [0] * width*height*bpp)
def offset(x, y):
# return the offset into the bytes array for the start of

4
wxPython/demo/Main.py
View File

@@ -50,7 +50,6 @@ _treeList = [
'AnalogClock',
'AUI_DockingWindowMgr',
'AUI_Notebook',
'BitmapFromBuffer',
'CheckListCtrlMixin',
'ComboTreeBox',
'Pickers',
@@ -58,6 +57,8 @@ _treeList = [
'RichTextCtrl',
'Treebook',
'Toolbook',
'BitmapFromBuffer',
'RawBitmapAccess',
]),
# managed windows == things with a (optional) caption you can close
@@ -239,6 +240,7 @@ _treeList = [
'ImageAlpha',
'ImageFromStream',
'Mask',
'RawBitmapAccess',
'Throbber',
]),

79
wxPython/demo/RawBitmapAccess.py Normal file
View File

@@ -0,0 +1,79 @@
import wx
#----------------------------------------------------------------------
class TestPanel(wx.Panel):
def __init__(self, parent, log):
self.log = log
wx.Panel.__init__(self, parent, -1)
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.redBmp = self.MakeBitmap(188, 143, 234)
self.greenBmp = self.MakeBitmap(35, 142, 35)
self.blueBmp = self.MakeBitmap(50, 153, 204)
def MakeBitmap(self, red, green, blue, alpha=128):
bmp = wx.EmptyBitmap(100, 100, 32)
# Create an object that facilitates access to the bitmap's
# pixel buffer
pixelData = wx.AlphaPixelData(bmp)
if not pixelData:
raise RuntimeError("Failed to gain raw access to bitmap data.")
# We have two ways to access each pixel, first we'll use an
# iterator to set every pixel to the colour and alpha values
# passed in.
for pixel in pixelData:
pixel.Set(red, green, blue, alpha)
# Next we'll use the pixel accessor to draw a border
pixels = pixelData.GetPixels()
for x in xrange(100):
pixels.MoveTo(pixelData, x, 0)
pixels.Set(red, green, blue, wx.ALPHA_OPAQUE)
pixels.MoveTo(pixelData, x, 99)
pixels.Set(red, green, blue, wx.ALPHA_OPAQUE)
for y in xrange(100):
pixels.MoveTo(pixelData, 0, y)
pixels.Set(red, green, blue, wx.ALPHA_OPAQUE)
pixels.MoveTo(pixelData, 99, y)
pixels.Set(red, green, blue, wx.ALPHA_OPAQUE)
return bmp
def OnPaint(self, evt):
dc = wx.PaintDC(self)
dc.DrawBitmap(self.redBmp, 50, 50, True)
dc.DrawBitmap(self.greenBmp, 110, 110, True)
dc.DrawBitmap(self.blueBmp, 170, 50, True)
#----------------------------------------------------------------------
def runTest(frame, nb, log):
win = TestPanel(nb, log)
return win
#----------------------------------------------------------------------
overview = """<html><body>
<h2><center>Raw Bitmap Access</center></h2>
wx.NativePixelData and wx.AlphaPixelData provide a cross-platform way
to access the platform-specific pixel buffer within a wx.Bitmap. They
provide both a random access method, and an iterator interface.
</body></html>
"""
if __name__ == '__main__':
import sys,os
import run
run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])