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some efficiency tweaks

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40921 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robin Dunn
2006-08-30 00:19:25 +00:00
parent 9bcdb6310e
commit 1ff2acae07
1 changed files with 13 additions and 28 deletions
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41
wxPython/demo/BitmapFromBuffer.py
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@@ -34,18 +34,13 @@ class TestPanel(wx.Panel):
bpp = 3 # bytes per pixel bpp = 3 # bytes per pixel
bytes = array.array('B', [0] * 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
# the x,y pixel
return y*width*bpp + x*bpp
for y in xrange(height): for y in xrange(height):
for x in xrange(width): for x in xrange(width):
offset = y*width*bpp + x*bpp
r,g,b = self.GetRGB(x, y, bpp) r,g,b = self.GetRGB(x, y, bpp)
bytes[offset(x, y) + 0] = r bytes[offset + 0] = r
bytes[offset(x, y) + 1] = g bytes[offset + 1] = g
bytes[offset(x, y) + 2] = b bytes[offset + 2] = b
##print (x, y), offset(x, y), (r, g, b)
self.rgbBmp = wx.BitmapFromBuffer(width, height, bytes) self.rgbBmp = wx.BitmapFromBuffer(width, height, bytes)
@@ -56,19 +51,14 @@ class TestPanel(wx.Panel):
bpp = 4 # bytes per pixel bpp = 4 # bytes per pixel
bytes = array.array('B', [0] * 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
# the x,y pixel
return y*width*bpp + x*bpp
for y in xrange(height): for y in xrange(height):
for x in xrange(width): for x in xrange(width):
offset = y*width*bpp + x*bpp
r,g,b,a = self.GetRGB(x, y, bpp) r,g,b,a = self.GetRGB(x, y, bpp)
bytes[offset(x, y) + 0] = r bytes[offset + 0] = r
bytes[offset(x, y) + 1] = g bytes[offset + 1] = g
bytes[offset(x, y) + 2] = b bytes[offset + 2] = b
bytes[offset(x, y) + 3] = a bytes[offset + 3] = a
##print (x, y), offset(x, y), (r, g, b, a)
self.rgbaBmp = wx.BitmapFromBufferRGBA(width, height, bytes) self.rgbaBmp = wx.BitmapFromBufferRGBA(width, height, bytes)
@@ -79,18 +69,13 @@ class TestPanel(wx.Panel):
bpp = 3 # bytes per pixel bpp = 3 # bytes per pixel
bytes = array.array('B', [0] * 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
# the x,y pixel
return y*width*bpp + x*bpp
for y in xrange(height): for y in xrange(height):
for x in xrange(width): for x in xrange(width):
offset = y*width*bpp + x*bpp
r,g,b = self.GetRGB(x, y, bpp) r,g,b = self.GetRGB(x, y, bpp)
bytes[offset(x, y) + 0] = r bytes[offset + 0] = r
bytes[offset(x, y) + 1] = g bytes[offset + 1] = g
bytes[offset(x, y) + 2] = b bytes[offset + 2] = b
##print (x, y), offset(x, y), (r, g, b)
# just use an alpha buffer with a constant alpha value for all # just use an alpha buffer with a constant alpha value for all
# pixels for this example, it could just as easily have # pixels for this example, it could just as easily have