def spritemap(css_fs, conf=None, out=sys.stderr):
w_ln = lambda t: out.write(t + "\n")
#: sum of all spritemaps used from any css files
smaps = SpriteMapCollector(conf=conf)
for css in css_fs:
w_ln("mapping sprites in source %s" % (css.fname,))
for sm in smaps.collect(css.map_sprites()):
w_ln(" - %s" % (sm.fname,))
# Weed out single-image spritemaps (these make no sense.)
smaps = [sm for sm in smaps if len(sm) > 1]
sm_plcs = []
for smap in smaps:
with open_sprites(smap, pad=conf.padding) as sprites:
w_ln("packing sprites in mapping %s" % (smap.fname,))
logger.debug("annealing %s in steps of %d",
smap.fname, conf.anneal_steps)
packed = PackedBoxes(sprites, anneal_steps=conf.anneal_steps)
print_packed_size(packed)
sm_plcs.append((smap, packed.placements))
w_ln("writing spritemap image at %s" % (smap.fname,))
im = stitch(packed)
with open(smap.fname, "wb") as fp:
im.save(fp)
replacer = SpriteReplacer(sm_plcs)
for css in css_fs:
w_ln("writing new css at %s" % (css.output_fname,))
with open(css.output_fname, "wb") as fp:
print_css(replacer(css), out=fp)
def main():
import os
import time
from spritecss.packing.sprites import open_sprites
logging.basicConfig(level=logging.DEBUG)
d = '/ssd/home/work/imagemap/images'
f = [os.path.join(d, x)
for x in sorted(os.listdir(d))
if x.endswith('.png')]
with open_sprites(f, pad=(1, 1)) as sprites:
t1 = time.time()
im, placements = naive_packing(sprites)
t2 = time.time()
print("naive_packing took %.2f seconds" % (t2 - t1,))
with open('images.html', 'w') as fp:
fp.write('<!DOCTYPE html><html><head><meta charset="utf-8" />' +
'<title>Naive sprite packing</title></head>\n')
fp.write('<body style="background-color:black">\n')
fp.write(('<div style="position:relative;width:%dpx;height:%dpx;' +
'background-color:gray;overflow:hidden">\n') %
(im.width, im.height))
for placement, image in placements:
fp.write(
('<img src="{im.fname}" ' +
'style="position:absolute;' +
'left:{left}px;top:{top}px"/>\n').format(
im=image, left=placement[0], top=placement[1]))
fp.write('</div></body></html>\n')
def input(self, filename=None, **kwargs):
if not filename or not filename.startswith(settings.COMPRESS_ROOT) or not filename.endswith(".scss"):
return self.content
source_path = filename
# Save the input data for later
css = self.content
# Build config object
conf = LocalCSSConfig(base=self.options, fname=source_path, root=settings.COMPRESS_ROOT)
# Instantiate a dummy file instance
cssfile = FakeCSSFile(fname=source_path, conf=conf, data=css)
# Find spritemaps
smaps = SpriteMapCollector(conf=conf)
smaps.collect(cssfile.map_sprites())
# Weed out single-image spritemaps
smaps = [sm for sm in smaps if len(sm) > 1]
# Generate spritemapped image
# This code is almost verbatim from spritecss.main.spritemap
sm_plcs = []
for smap in smaps:
with open_sprites(smap, pad=conf.padding) as sprites:
print("packing sprites in mapping %s" % (smap.fname,))
if conf.packer == 'annealing':
print("annealing %s in steps of %d" % (smap.fname, conf.anneal_steps))
packed = PackedBoxes(sprites, anneal_steps=conf.anneal_steps)
print_packed_size(packed)
sm_plcs.append((smap, packed.placements))
im = stitch(packed)
elif conf.packer == 'naive':
print("Naive packing")
im, placements = naive_packing(sprites)
sm_plcs.append((smap, placements))
print("writing spritemap image at %s" % (smap.fname,))
with open(smap.fname, "wb") as fp:
im.save(fp)
# Instantiate a fake file instance again
cssfile = FakeCSSFile(fname=source_path, conf=conf, data=css)
out = StringIO()
# Output rewritten CSS with spritemapped URLs
replacer = SpriteReplacer(sm_plcs)
for data in iter_print_css(replacer(cssfile)):
out.write(data)
return out.getvalue()
def input(self, _in, out, **kw):
source_path = kw['source_path']
# Save the input data for later
css = _in.read()
# Build config object
conf = CSSConfig(base=self.options, fname=source_path)
# Instantiate a dummy file instance
cssfile = FakeCSSFile(fname=source_path, conf=conf, data=css)
# Find spritemaps
smaps = SpriteMapCollector(conf=conf)
smaps.collect(cssfile.map_sprites())
# Weed out single-image spritemaps
smaps = [sm for sm in smaps if len(sm) > 1]
# Generate spritemapped image
# This code is almost verbatim from spritecss.main.spritemap
sm_plcs = []
for smap in smaps:
with open_sprites(smap, pad=conf.padding) as sprites:
print(("Packing sprites in mapping %s" % (smap.fname,)))
packed = PackedBoxes(sprites, anneal_steps=conf.anneal_steps)
print_packed_size(packed)
sm_plcs.append((smap, packed.placements))
print(("Writing spritemap image at %s" % (smap.fname,)))
im = stitch(packed)
with open(smap.fname, "wb") as fp:
im.save(fp)
# Instantiate a fake file instance again
cssfile = FakeCSSFile(fname=source_path, conf=conf, data=css)
# Output rewritten CSS with spritemapped URLs
replacer = SpriteReplacer(sm_plcs)
for data in iter_print_css(replacer(cssfile)):
out.write(data)
