def composite_image(im1, im2):
if isinstance(im1, GdkPixbuf.Pixbuf):
im1 = image_tools.pixbuf_to_pil(im1)
if isinstance(im2, GdkPixbuf.Pixbuf):
im2 = image_tools.pixbuf_to_pil(im2)
im = Image.new('RGBA',
(im1.size[0] + im2.size[0], max(im1.size[1], im2.size[1])))
im.paste(im1, (0, 0, im1.size[0], im1.size[1]))
im.paste(im2, (im1.size[0], 0, im1.size[0] + im2.size[0], im2.size[1]))
return im
def composite_image(im1, im2):
if isinstance(im1, gtk.gdk.Pixbuf):
im1 = image_tools.pixbuf_to_pil(im1)
if isinstance(im2, gtk.gdk.Pixbuf):
im2 = image_tools.pixbuf_to_pil(im2)
im = Image.new('RGBA',
(im1.size[0] + im2.size[0],
max(im1.size[1], im2.size[1])))
im.paste(im1, (0, 0, im1.size[0], im1.size[1]))
im.paste(im2, (im1.size[0], 0, im1.size[0]+im2.size[0], im2.size[1]))
return im
def draw_histogram(pixbuf, height=170, fill=170, text=True):
"""Draw a histogram from <pixbuf> and return it as another pixbuf.
The returned prixbuf will be 262x<height> px.
The value of <fill> determines the colour intensity of the filled graphs,
valid values are between 0 and 255.
If <text> is True a label with the maximum pixel value will be added to
one corner.
"""
im = Image.new('RGB', (258, height - 4), (30, 30, 30))
hist_data = image_tools.pixbuf_to_pil(pixbuf).histogram()
maximum = max(hist_data[:768] + [1])
y_scale = float(height - 6) / maximum
r = [int(hist_data[n] * y_scale) for n in range(256)]
g = [int(hist_data[n] * y_scale) for n in range(256, 512)]
b = [int(hist_data[n] * y_scale) for n in range(512, 768)]
im_data = im.getdata()
# Draw the filling colours
for x in range(256):
for y in range(1, max(r[x], g[x], b[x]) + 1):
r_px = y <= r[x] and fill or 0
g_px = y <= g[x] and fill or 0
b_px = y <= b[x] and fill or 0
im_data.putpixel((x + 1, height - 5 - y), (r_px, g_px, b_px))
# Draw the outlines
for x in range(1, 256):
for y in range(r[x - 1] + 1, r[x] + 1) + [r[x]] * (r[x] != 0):
r_px, g_px, b_px = im_data.getpixel((x + 1, height - 5 - y))
im_data.putpixel((x + 1, height - 5 - y), (255, g_px, b_px))
for y in range(r[x] + 1, r[x - 1] + 1):
r_px, g_px, b_px = im_data.getpixel((x, height - 5 - y))
im_data.putpixel((x, height - 5 - y), (255, g_px, b_px))
for y in range(g[x - 1] + 1, g[x] + 1) + [g[x]] * (g[x] != 0):
r_px, g_px, b_px = im_data.getpixel((x + 1, height - 5 - y))
im_data.putpixel((x + 1, height - 5 - y), (r_px, 255, b_px))
for y in range(g[x] + 1, g[x - 1] + 1):
r_px, g_px, b_px = im_data.getpixel((x, height - 5 - y))
im_data.putpixel((x, height - 5 - y), (r_px, 255, b_px))
for y in range(b[x - 1] + 1, b[x] + 1) + [b[x]] * (b[x] != 0):
r_px, g_px, b_px = im_data.getpixel((x + 1, height - 5 - y))
im_data.putpixel((x + 1, height - 5 - y), (r_px, g_px, 255))
for y in range(b[x] + 1, b[x - 1] + 1):
r_px, g_px, b_px = im_data.getpixel((x, height - 5 - y))
im_data.putpixel((x, height - 5 - y), (r_px, g_px, 255))
if text:
maxstr = 'max: ' + str(maximum)
draw = ImageDraw.Draw(im)
draw.rectangle((0, 0, len(maxstr) * 6 + 2, 10), fill=(30, 30, 30))
draw.text((2, 0), maxstr, fill=(255, 255, 255))
im = ImageOps.expand(im, 1, (80, 80, 80))
im = ImageOps.expand(im, 1, (0, 0, 0))
return image_tools.pil_to_pixbuf(im)
def draw_histogram(pixbuf, height=170, fill=170, text=True):
"""Draw a histogram from <pixbuf> and return it as another pixbuf.
The returned prixbuf will be 262x<height> px.
The value of <fill> determines the colour intensity of the filled graphs,
valid values are between 0 and 255.
If <text> is True a label with the maximum pixel value will be added to
one corner.
"""
im = Image.new('RGB', (258, height - 4), (30, 30, 30))
hist_data = image_tools.pixbuf_to_pil(pixbuf).histogram()
maximum = max(hist_data[:768] + [1])
y_scale = float(height - 6) / maximum
r = [int(hist_data[n] * y_scale) for n in xrange(256)]
g = [int(hist_data[n] * y_scale) for n in xrange(256, 512)]
b = [int(hist_data[n] * y_scale) for n in xrange(512, 768)]
im_data = im.getdata()
# Draw the filling colours
for x in xrange(256):
for y in xrange(1, max(r[x], g[x], b[x]) + 1):
r_px = y <= r[x] and fill or 0
g_px = y <= g[x] and fill or 0
b_px = y <= b[x] and fill or 0
im_data.putpixel((x + 1, height - 5 - y), (r_px, g_px, b_px))
# Draw the outlines
for x in xrange(1, 256):
for y in range(r[x-1] + 1, r[x] + 1) + [r[x]] * (r[x] != 0):
r_px, g_px, b_px = im_data.getpixel((x + 1, height - 5 - y))
im_data.putpixel((x + 1, height - 5 - y), (255, g_px, b_px))
for y in range(r[x] + 1, r[x-1] + 1):
r_px, g_px, b_px = im_data.getpixel((x, height - 5 - y))
im_data.putpixel((x, height - 5 - y), (255, g_px, b_px))
for y in range(g[x-1] + 1, g[x] + 1) + [g[x]] * (g[x] != 0):
r_px, g_px, b_px = im_data.getpixel((x + 1, height - 5 - y))
im_data.putpixel((x + 1, height - 5 - y), (r_px, 255, b_px))
for y in range(g[x] + 1, g[x-1] + 1):
r_px, g_px, b_px = im_data.getpixel((x, height - 5 - y))
im_data.putpixel((x, height - 5 - y), (r_px, 255, b_px))
for y in range(b[x-1] + 1, b[x] + 1) + [b[x]] * (b[x] != 0):
r_px, g_px, b_px = im_data.getpixel((x + 1, height - 5 - y))
im_data.putpixel((x + 1, height - 5 - y), (r_px, g_px, 255))
for y in range(b[x] + 1, b[x-1] + 1):
r_px, g_px, b_px = im_data.getpixel((x, height - 5 - y))
im_data.putpixel((x, height - 5 - y), (r_px, g_px, 255))
if text:
maxstr = 'max: ' + str(maximum)
draw = ImageDraw.Draw(im)
draw.rectangle((0, 0, len(maxstr) * 6 + 2, 10), fill=(30, 30, 30))
draw.text((2, 0), maxstr, fill=(255, 255, 255))
im = ImageOps.expand(im, 1, (80, 80, 80))
im = ImageOps.expand(im, 1, (0, 0, 0))
return image_tools.pil_to_pixbuf(im)
def _copy_windows(self, pixbuf, path):
""" Copies pixbuf and path to the clipboard.
Uses native Win32 API, as GTK+ doesn't seem to work. """
windll = ctypes.windll
OpenClipboard = windll.user32.OpenClipboard
EmptyClipboard = windll.user32.EmptyClipboard
SetClipboardData = windll.user32.SetClipboardData
CloseClipboard = windll.user32.CloseClipboard
GlobalAlloc = windll.kernel32.GlobalAlloc
GlobalLock = windll.kernel32.GlobalLock
GlobalLock.restype = ctypes.c_void_p
GlobalUnlock = windll.kernel32.GlobalUnlock
def buffer_to_handle(buffer, buffer_size):
""" Creates a memory handle for the passed data.
This handle doesn't need to be freed by the application. """
global_mem = GlobalAlloc(
0x0042, # GMEM_MOVEABLE | GMEM_ZEROINIT
buffer_size)
lock = GlobalLock(global_mem)
ctypes.memmove(lock, ctypes.addressof(buffer), buffer_size)
GlobalUnlock(global_mem)
return global_mem
# Paste the text as Unicode string
text_buffer = ctypes.create_unicode_buffer(path)
text_handle = buffer_to_handle(text_buffer, ctypes.sizeof(text_buffer))
# Paste the image as Win32 DIB structure
pil = image_tools.pixbuf_to_pil(pixbuf)
output = cStringIO.StringIO()
pil.convert("RGB").save(output, "BMP")
dibdata = output.getvalue()[14:]
output.close()
image_buffer = ctypes.create_string_buffer(dibdata)
image_handle = buffer_to_handle(image_buffer,
ctypes.sizeof(image_buffer))
# Actually copy data to clipboard
if OpenClipboard(self._window.window.handle):
EmptyClipboard()
SetClipboardData(
13, # CF_UNICODETEXT
text_handle)
SetClipboardData(
8, # CF_DIB
image_handle)
CloseClipboard()
else:
log.warning('Could not open clipboard.')
def test_pixbuf_to_pil(self):
for image in (
'transparent.png',
'transparent-indexed.png',
'pattern-opaque-rgb.png',
'pattern-opaque-rgba.png',
'pattern-transparent-rgba.png',
):
pixbuf = image_tools.load_pixbuf(get_image_path(image))
im = image_tools.pixbuf_to_pil(pixbuf)
msg = ('pixbuf_to_pil("%s") failed; '
'result %%(diff_type)s differs: %%(diff)s' % (image, ))
self.assertImagesEqual(im, pixbuf, msg=msg)
def _copy_windows(self, pixbuf, path):
""" Copies pixbuf and path to the clipboard.
Uses native Win32 API, as GTK+ doesn't seem to work. """
windll = ctypes.windll
OpenClipboard = windll.user32.OpenClipboard
EmptyClipboard = windll.user32.EmptyClipboard
SetClipboardData = windll.user32.SetClipboardData
CloseClipboard = windll.user32.CloseClipboard
GlobalAlloc = windll.kernel32.GlobalAlloc
GlobalLock = windll.kernel32.GlobalLock
GlobalLock.restype = ctypes.c_void_p
GlobalUnlock = windll.kernel32.GlobalUnlock
def buffer_to_handle(buffer, buffer_size):
""" Creates a memory handle for the passed data.
This handle doesn't need to be freed by the application. """
global_mem = GlobalAlloc(
0x0042, # GMEM_MOVEABLE | GMEM_ZEROINIT
buffer_size)
lock = GlobalLock(global_mem)
ctypes.memmove(lock, ctypes.addressof(buffer), buffer_size)
GlobalUnlock(global_mem)
return global_mem
# Paste the text as Unicode string
text_buffer = ctypes.create_unicode_buffer(path)
text_handle = buffer_to_handle(text_buffer,
ctypes.sizeof(text_buffer))
# Paste the image as Win32 DIB structure
pil = image_tools.pixbuf_to_pil(pixbuf)
output = cStringIO.StringIO()
pil.convert("RGB").save(output, "BMP")
dibdata = output.getvalue()[14:]
output.close()
image_buffer = ctypes.create_string_buffer(dibdata)
image_handle = buffer_to_handle(image_buffer,
ctypes.sizeof(image_buffer))
# Actually copy data to clipboard
if OpenClipboard(self._window.window.handle):
EmptyClipboard()
SetClipboardData(13, # CF_UNICODETEXT
text_handle)
SetClipboardData(8, # CF_DIB
image_handle)
CloseClipboard()
else:
log.warning('Could not open clipboard.')
def test_pixbuf_to_pil(self):
for image in (
'transparent.png',
'transparent-indexed.png',
'pattern-opaque-rgb.png',
'pattern-opaque-rgba.png',
'pattern-transparent-rgba.png',
):
pixbuf = image_tools.load_pixbuf(get_image_path(image))
im = image_tools.pixbuf_to_pil(pixbuf)
msg = (
'pixbuf_to_pil("%s") failed; '
'result %%(diff_type)s differs: %%(diff)s'
% (image,)
)
self.assertImagesEqual(im, pixbuf, msg=msg)
