from direct.directnotify.DirectNotifyGlobal import directNotify
from panda3d.core import PNMImage, Filename, PNMFileTypeRegistry, StringStream
import struct
[docs]class Icon:
""" This class is used to create an icon for various platforms. """
notify = directNotify.newCategory("Icon")
[docs] def __init__(self):
self.images = {}
[docs] def addImage(self, image):
""" Adds an image to the icon. Returns False on failure, True on success.
Only one image per size can be loaded, and the image size must be square. """
if not isinstance(image, PNMImage):
fn = image
if not isinstance(fn, Filename):
fn = Filename.fromOsSpecific(fn)
image = PNMImage()
if not image.read(fn):
Icon.notify.warning("Image '%s' could not be read" % fn.getBasename())
return False
if image.getXSize() != image.getYSize():
Icon.notify.warning("Ignoring image without square size")
return False
self.images[image.getXSize()] = image
return True
[docs] def generateMissingImages(self):
""" Generates image sizes that should be present but aren't by scaling
from the next higher size. """
for required_size in (256, 128, 48, 32, 16):
if required_size in self.images:
continue
sizes = sorted(self.images.keys())
if required_size * 2 in sizes:
from_size = required_size * 2
else:
from_size = 0
for from_size in sizes:
if from_size > required_size:
break
if from_size > required_size:
Icon.notify.warning("Generating %dx%d icon by scaling down %dx%d image" % (required_size, required_size, from_size, from_size))
image = PNMImage(required_size, required_size)
image.setColorType(self.images[from_size].getColorType())
image.quickFilterFrom(self.images[from_size])
self.images[required_size] = image
else:
Icon.notify.warning("Cannot generate %dx%d icon; no higher resolution image available" % (required_size, required_size))
def _write_bitmap(self, fp, image, size, bpp):
""" Writes the bitmap header and data of an .ico file. """
fp.write(struct.pack('<IiiHHIIiiII', 40, size, size * 2, 1, bpp, 0, 0, 0, 0, 0, 0))
# XOR mask
if bpp == 24:
# Align rows to 4-byte boundary
rowalign = b'\0' * (-(size * 3) & 3)
for y in range(size):
for x in range(size):
r, g, b = image.getXel(x, size - y - 1)
fp.write(struct.pack('<BBB', int(b * 255), int(g * 255), int(r * 255)))
fp.write(rowalign)
elif bpp == 32:
for y in range(size):
for x in range(size):
r, g, b, a = image.getXelA(x, size - y - 1)
fp.write(struct.pack('<BBBB', int(b * 255), int(g * 255), int(r * 255), int(a * 255)))
elif bpp == 8:
# We'll have to generate a palette of 256 colors.
hist = PNMImage.Histogram()
image2 = PNMImage(image)
if image2.hasAlpha():
image2.premultiplyAlpha()
image2.removeAlpha()
image2.quantize(256)
image2.make_histogram(hist)
colors = list(hist.get_pixels())
assert len(colors) <= 256
# Write the palette.
i = 0
while i < 256 and i < len(colors):
r, g, b, a = colors[i]
fp.write(struct.pack('<BBBB', b, g, r, 0))
i += 1
if i < 256:
# Fill the rest with zeroes.
fp.write(b'\x00' * (4 * (256 - i)))
# Write indices. Align rows to 4-byte boundary.
rowalign = b'\0' * (-size & 3)
for y in range(size):
for x in range(size):
pixel = image2.get_pixel(x, size - y - 1)
index = colors.index(pixel)
fp.write(struct.pack('<B', index))
fp.write(rowalign)
else:
raise ValueError("Invalid bpp %d" % (bpp))
# Create an AND mask, aligned to 4-byte boundary
if image.hasAlpha() and bpp <= 8:
rowalign = b'\0' * (-((size + 7) >> 3) & 3)
for y in range(size):
mask = 0
num_bits = 7
for x in range(size):
a = image.get_alpha_val(x, size - y - 1)
if a <= 1:
mask |= (1 << num_bits)
num_bits -= 1
if num_bits < 0:
fp.write(struct.pack('<B', mask))
mask = 0
num_bits = 7
if num_bits < 7:
fp.write(struct.pack('<B', mask))
fp.write(rowalign)
else:
andsize = (size + 7) >> 3
if andsize % 4 != 0:
andsize += 4 - (andsize % 4)
fp.write(b'\x00' * (andsize * size))
[docs] def makeICO(self, fn):
""" Writes the images to a Windows ICO file. Returns True on success. """
if not isinstance(fn, Filename):
fn = Filename.fromOsSpecific(fn)
fn.setBinary()
# ICO files only support resolutions up to 256x256.
count = 0
for size in self.images:
if size < 256:
count += 1
if size <= 256:
count += 1
dataoffs = 6 + count * 16
ico = open(fn, 'wb')
ico.write(struct.pack('<HHH', 0, 1, count))
# Write 8-bpp image headers for sizes under 256x256.
for size, image in self.images.items():
if size >= 256:
continue
ico.write(struct.pack('<BB', size, size))
# Calculate row sizes
xorsize = size
if xorsize % 4 != 0:
xorsize += 4 - (xorsize % 4)
andsize = (size + 7) >> 3
if andsize % 4 != 0:
andsize += 4 - (andsize % 4)
datasize = 40 + 256 * 4 + (xorsize + andsize) * size
ico.write(struct.pack('<BBHHII', 0, 0, 1, 8, datasize, dataoffs))
dataoffs += datasize
# Write 24/32-bpp image headers.
for size, image in self.images.items():
if size > 256:
continue
elif size == 256:
ico.write(b'\0\0')
else:
ico.write(struct.pack('<BB', size, size))
# Calculate the size so we can write the offset within the file.
if image.hasAlpha():
bpp = 32
xorsize = size * 4
else:
bpp = 24
xorsize = size * 3 + (-(size * 3) & 3)
andsize = (size + 7) >> 3
if andsize % 4 != 0:
andsize += 4 - (andsize % 4)
datasize = 40 + (xorsize + andsize) * size
ico.write(struct.pack('<BBHHII', 0, 0, 1, bpp, datasize, dataoffs))
dataoffs += datasize
# Now write the actual icon bitmap data.
for size, image in self.images.items():
if size < 256:
self._write_bitmap(ico, image, size, 8)
for size, image in self.images.items():
if size <= 256:
bpp = 32 if image.hasAlpha() else 24
self._write_bitmap(ico, image, size, bpp)
assert ico.tell() == dataoffs
ico.close()
return True
[docs] def makeICNS(self, fn):
""" Writes the images to an Apple ICNS file. Returns True on success. """
if not isinstance(fn, Filename):
fn = Filename.fromOsSpecific(fn)
fn.setBinary()
icns = open(fn, 'wb')
icns.write(b'icns\0\0\0\0')
icon_types = {16: b'is32', 32: b'il32', 48: b'ih32', 128: b'it32'}
mask_types = {16: b's8mk', 32: b'l8mk', 48: b'h8mk', 128: b't8mk'}
png_types = {256: b'ic08', 512: b'ic09', 1024: b'ic10'}
pngtype = PNMFileTypeRegistry.getGlobalPtr().getTypeFromExtension("png")
for size, image in sorted(self.images.items(), key=lambda item:item[0]):
if size in png_types and pngtype is not None:
stream = StringStream()
image.write(stream, "", pngtype)
pngdata = stream.data
icns.write(png_types[size])
icns.write(struct.pack('>I', len(pngdata)))
icns.write(pngdata)
elif size in icon_types:
# If it has an alpha channel, we write out a mask too.
if image.hasAlpha():
icns.write(mask_types[size])
icns.write(struct.pack('>I', size * size + 8))
for y in range(size):
for x in range(size):
icns.write(struct.pack('<B', int(image.getAlpha(x, y) * 255)))
icns.write(icon_types[size])
icns.write(struct.pack('>I', size * size * 4 + 8))
for y in range(size):
for x in range(size):
r, g, b = image.getXel(x, y)
icns.write(struct.pack('>BBBB', 0, int(r * 255), int(g * 255), int(b * 255)))
length = icns.tell()
icns.seek(4)
icns.write(struct.pack('>I', length))
icns.close()
return True
