def background_noise(density=None, opacity=None, size=None, monochrome=False, intensity=(), color=None, background=None, inline=False): if not Image: raise Exception("Images manipulation require PIL") density = [Number(v).value for v in List.from_maybe(density)] intensity = [Number(v).value for v in List.from_maybe(intensity)] color = [Color(v).value for v in List.from_maybe(color) if v] opacity = [Number(v).value for v in List.from_maybe(opacity)] size = int(Number(size).value) if size else 0 if size < 1 or size > 512: size = 200 monochrome = bool(monochrome) background = Color(background).value if background else None new_image = Image.new(mode='RGBA', size=(size, size)) pixdata = new_image.load() _image_noise(pixdata, size, density, intensity, color, opacity, monochrome) if not inline: key = (size, density, intensity, color, opacity, monochrome) asset_file = 'noise-%s%sx%s' % ('mono-' if monochrome else '', size, size) # asset_file += '-[%s][%s]' % ('-'.join(to_str(s).replace('.', '_') for s in density or []), '-'.join(to_str(s).replace('.', '_') for s in opacity or [])) asset_file += '-' + base64.urlsafe_b64encode( hashlib.md5(repr(key)).digest()).rstrip('=').replace('-', '_') asset_file += '.png' asset_path = os.path.join( config.ASSETS_ROOT or os.path.join(config.STATIC_ROOT, 'assets'), asset_file) try: new_image.save(asset_path) except IOError: log.exception("Error while saving image") inline = True # Retry inline version url = '%s%s' % (config.ASSETS_URL, asset_file) if inline: output = six.BytesIO() new_image.save(output, format='PNG') contents = output.getvalue() output.close() url = 'data:image/png;base64,' + base64.b64encode(contents) inline = 'url("%s")' % escape(url) return String.unquoted(inline)
def background_brushed(density=None, intensity=None, color=None, opacity=None, size=None, monochrome=False, direction=(), spread=(), background=None, inline=False): if not Image: raise Exception("Images manipulation require PIL") density = [Number(v).value for v in List.from_maybe(density)] intensity = [Number(v).value for v in List.from_maybe(intensity)] color = [Color(v).value for v in List.from_maybe(color) if v] opacity = [Number(v).value for v in List.from_maybe(opacity)] size = int(Number(size).value) if size else -1 if size < 0 or size > 512: size = 200 monochrome = bool(monochrome) direction = [Number(v).value for v in List.from_maybe(direction)] spread = [Number(v).value for v in List.from_maybe(spread)] background = Color(background).value if background else None new_image = Image.new( mode='RGBA', size=(size, size) ) pixdata = new_image.load() _image_brushed(pixdata, size, density, intensity, color, opacity, monochrome, direction, spread, background) if not inline: key = (size, density, intensity, color, opacity, monochrome, direction, spread, background) asset_file = 'brushed-%s%sx%s' % ('mono-' if monochrome else '', size, size) # asset_file += '-[%s][%s][%s]' % ('-'.join(to_str(s).replace('.', '_') for s in density or []), '-'.join(to_str(s).replace('.', '_') for s in opacity or []), '-'.join(to_str(s).replace('.', '_') for s in direction or [])) asset_file += '-' + make_filename_hash(key) asset_file += '.png' asset_path = os.path.join(config.ASSETS_ROOT or os.path.join(config.STATIC_ROOT, 'assets'), asset_file) try: new_image.save(asset_path) except IOError: log.exception("Error while saving image") inline = True # Retry inline version url = '%s%s' % (config.ASSETS_URL, asset_file) if inline: output = six.BytesIO() new_image.save(output, format='PNG') contents = output.getvalue() output.close() url = make_data_url('image/png', contents) inline = 'url("%s")' % escape(url) return String.unquoted(inline)
def ie_hex_str(color): c = Color(color).value return String("#{3:02X}{0:02X}{1:02X}{2:02X}".format( int(round(c[0])), int(round(c[1])), int(round(c[2])), int(round(c[3] * 255)), ))
def sprite_map(g, **kwargs): """ Generates a sprite map from the files matching the glob pattern. Uses the keyword-style arguments passed in to control the placement. $direction - Sprite map layout. Can be `vertical` (default), `horizontal`, `diagonal` or `smart`. $position - For `horizontal` and `vertical` directions, the position of the sprite. (defaults to `0`) $<sprite>-position - Position of a given sprite. $padding, $spacing - Adds paddings to sprites (top, right, bottom, left). (defaults to `0, 0, 0, 0`) $<sprite>-padding, $<sprite>-spacing - Padding for a given sprite. $dst-color - Together with `$src-color`, forms a map of source colors to be converted to destiny colors (same index of `$src-color` changed to `$dst-color`). $<sprite>-dst-color - Destiny colors for a given sprite. (defaults to `$dst-color`) $src-color - Selects source colors to be converted to the corresponding destiny colors. (defaults to `black`) $<sprite>-dst-color - Source colors for a given sprite. (defaults to `$src-color`) $collapse - Collapses every image in the sprite map to a fixed size (`x` and `y`). $collapse-x - Collapses a size for `x`. $collapse-y - Collapses a size for `y`. """ if not Image: raise SassMissingDependency('PIL', 'image manipulation') sprite_maps = _get_cache('sprite_maps') now_time = time.time() globs = String(g, quotes=None).value globs = sorted(g.strip() for g in globs.split(',')) _k_ = ','.join(globs) files = None rfiles = None tfiles = None map_name = None if _k_ in sprite_maps: sprite_maps[_k_]['*'] = now_time else: files = [] rfiles = [] tfiles = [] for _glob in globs: if '..' not in _glob: # Protect against going to prohibited places... if callable(config.STATIC_ROOT): _glob_path = _glob _rfiles = _files = sorted(config.STATIC_ROOT(_glob)) else: _glob_path = os.path.join(config.STATIC_ROOT, _glob) _files = glob.glob(_glob_path) _files = sorted((f, None) for f in _files) _rfiles = [(rf[len(config.STATIC_ROOT):], s) for rf, s in _files] if _files: files.extend(_files) rfiles.extend(_rfiles) base_name = os.path.normpath( os.path.dirname(_glob)).replace('\\', '_').replace('/', '_') _map_name, _, _map_type = base_name.partition('.') if _map_type: _map_type += '-' if not map_name: map_name = _map_name tfiles.extend([_map_type] * len(_files)) else: glob_path = _glob_path if files is not None: if not files: log.error("Nothing found at '%s'", glob_path) return String.unquoted('') key = [f for (f, s) in files] + [repr(kwargs), config.ASSETS_URL] key = map_name + '-' + make_filename_hash(key) asset_file = key + '.png' ASSETS_ROOT = _assets_root() asset_path = os.path.join(ASSETS_ROOT, asset_file) cache_path = os.path.join(config.CACHE_ROOT or ASSETS_ROOT, asset_file + '.cache') inline = Boolean(kwargs.get('inline', False)) sprite_map = None asset = None file_asset = None inline_asset = None if os.path.exists(asset_path) or inline: try: save_time, file_asset, inline_asset, sprite_map, sizes = pickle.load( open(cache_path)) if file_asset: sprite_maps[file_asset.render()] = sprite_map if inline_asset: sprite_maps[inline_asset.render()] = sprite_map if inline: asset = inline_asset else: asset = file_asset except: pass if sprite_map: for file_, storage in files: _time = getmtime(file_, storage) if save_time < _time: if _time > now_time: log.warning( "File '%s' has a date in the future (cache ignored)" % file_) sprite_map = None # Invalidate cached sprite map break if sprite_map is None or asset is None: cache_buster = Boolean(kwargs.get('cache_buster', True)) direction = String.unquoted( kwargs.get('direction', config.SPRTE_MAP_DIRECTION)).value repeat = String.unquoted(kwargs.get('repeat', 'no-repeat')).value collapse = kwargs.get('collapse', Number(0)) if isinstance(collapse, List): collapse_x = int(Number(collapse[0]).value) collapse_y = int(Number(collapse[-1]).value) else: collapse_x = collapse_y = int(Number(collapse).value) if 'collapse_x' in kwargs: collapse_x = int(Number(kwargs['collapse_x']).value) if 'collapse_y' in kwargs: collapse_y = int(Number(kwargs['collapse_y']).value) position = Number(kwargs.get('position', 0)) if not position.is_simple_unit('%') and position.value > 1: position = position.value / 100.0 else: position = position.value if position < 0: position = 0.0 elif position > 1: position = 1.0 padding = kwargs.get('padding', kwargs.get('spacing', Number(0))) padding = [int(Number(v).value) for v in List.from_maybe(padding)] padding = (padding * 4)[:4] dst_colors = kwargs.get('dst_color') dst_colors = [ list(Color(v).value[:3]) for v in List.from_maybe(dst_colors) if v ] src_colors = kwargs.get('src_color', Color.from_name('black')) src_colors = [ tuple(Color(v).value[:3]) for v in List.from_maybe(src_colors) ] len_colors = max(len(dst_colors), len(src_colors)) dst_colors = (dst_colors * len_colors)[:len_colors] src_colors = (src_colors * len_colors)[:len_colors] def images(f=lambda x: x): for file_, storage in f(files): if storage is not None: _file = storage.open(file_) else: _file = file_ _image = Image.open(_file) yield _image names = tuple( os.path.splitext(os.path.basename(file_))[0] for file_, storage in files) tnames = tuple(tfiles[i] + n for i, n in enumerate(names)) has_dst_colors = False all_dst_colors = [] all_src_colors = [] all_positions = [] all_paddings = [] for name in names: name = name.replace('-', '_') _position = kwargs.get(name + '_position') if _position is None: _position = position else: _position = Number(_position) if not _position.is_simple_unit( '%') and _position.value > 1: _position = _position.value / 100.0 else: _position = _position.value if _position < 0: _position = 0.0 elif _position > 1: _position = 1.0 all_positions.append(_position) _padding = kwargs.get(name + '_padding', kwargs.get(name + '_spacing')) if _padding is None: _padding = padding else: _padding = [ int(Number(v).value) for v in List.from_maybe(_padding) ] _padding = (_padding * 4)[:4] all_paddings.append(_padding) _dst_colors = kwargs.get(name + '_dst_color') if _dst_colors is None: _dst_colors = dst_colors if dst_colors: has_dst_colors = True else: has_dst_colors = True _dst_colors = [ list(Color(v).value[:3]) for v in List.from_maybe(_dst_colors) if v ] _src_colors = kwargs.get(name + '_src_color', Color.from_name('black')) if _src_colors is None: _src_colors = src_colors else: _src_colors = [ tuple(Color(v).value[:3]) for v in List.from_maybe(_src_colors) ] _len_colors = max(len(_dst_colors), len(_src_colors)) _dst_colors = (_dst_colors * _len_colors)[:_len_colors] _src_colors = (_src_colors * _len_colors)[:_len_colors] all_dst_colors.append(_dst_colors) all_src_colors.append(_src_colors) sizes = tuple((collapse_x or i.size[0], collapse_y or i.size[1]) for i in images()) if direction == 'horizontal': layout = HorizontalSpritesLayout(sizes, all_paddings, position=all_positions) elif direction == 'vertical': layout = VerticalSpritesLayout(sizes, all_paddings, position=all_positions) elif direction == 'diagonal': layout = DiagonalSpritesLayout(sizes, all_paddings) elif direction == 'smart': layout = PackedSpritesLayout(sizes, all_paddings) else: raise Exception("Invalid direction %r" % (direction, )) layout_positions = list(layout) new_image = Image.new(mode='RGBA', size=(layout.width, layout.height), color=(0, 0, 0, 0)) useless_dst_color = has_dst_colors offsets_x = [] offsets_y = [] for i, image in enumerate(images()): x, y, width, height, cssx, cssy, cssw, cssh = layout_positions[ i] iwidth, iheight = image.size if has_dst_colors: pixdata = image.load() for _y in xrange(iheight): for _x in xrange(iwidth): pixel = pixdata[_x, _y] a = pixel[3] if len(pixel) == 4 else 255 if a: rgb = pixel[:3] for j, dst_color in enumerate( all_dst_colors[i]): if rgb == all_src_colors[i][j]: new_color = tuple( [int(c) for c in dst_color] + [a]) if pixel != new_color: pixdata[_x, _y] = new_color useless_dst_color = False break if iwidth != width or iheight != height: cy = 0 while cy < iheight: cx = 0 while cx < iwidth: new_image = alpha_composite( new_image, image, (x, y), (cx, cy, cx + width, cy + height)) cx += width cy += height else: new_image.paste(image, (x, y)) offsets_x.append(cssx) offsets_y.append(cssy) if useless_dst_color: log.warning( "Useless use of $dst-color in sprite map for files at '%s' (never used for)" % glob_path) filetime = int(now_time) if not inline: try: new_image.save(asset_path) url = '%s%s' % (config.ASSETS_URL, asset_file) if cache_buster: url += '?_=%s' % filetime except IOError: log.exception("Error while saving image") inline = True if inline: output = six.BytesIO() new_image.save(output, format='PNG') contents = output.getvalue() output.close() mime_type = 'image/png' url = make_data_url(mime_type, contents) url = 'url(%s)' % escape(url) if inline: asset = inline_asset = List( [String.unquoted(url), String.unquoted(repeat)]) else: asset = file_asset = List( [String.unquoted(url), String.unquoted(repeat)]) # Add the new object: sprite_map = dict( zip(tnames, zip(sizes, rfiles, offsets_x, offsets_y))) sprite_map['*'] = now_time sprite_map['*f*'] = asset_file sprite_map['*k*'] = key sprite_map['*n*'] = map_name sprite_map['*t*'] = filetime sizes = zip(files, sizes) cache_tmp = tempfile.NamedTemporaryFile(delete=False, dir=ASSETS_ROOT) pickle.dump( (now_time, file_asset, inline_asset, sprite_map, sizes), cache_tmp) cache_tmp.close() if sys.platform == 'win32' and os.path.isfile(cache_path): # on windows, cannot rename a file to a path that matches # an existing file, we have to remove it first os.remove(cache_path) os.rename(cache_tmp.name, cache_path) # Use the sorted list to remove older elements (keep only 500 objects): if len(sprite_maps) > MAX_SPRITE_MAPS: for a in sorted(sprite_maps, key=lambda a: sprite_maps[a]['*'], reverse=True)[KEEP_SPRITE_MAPS:]: del sprite_maps[a] log.warning("Exceeded maximum number of sprite maps (%s)" % MAX_SPRITE_MAPS) sprite_maps[asset.render()] = sprite_map image_size_cache = _get_cache('image_size_cache') for file_, size in sizes: image_size_cache[file_] = size # TODO this sometimes returns an empty list, or is never assigned to return asset
def _image_url(path, only_path=False, cache_buster=True, dst_color=None, src_color=None, inline=False, mime_type=None, spacing=None, collapse_x=None, collapse_y=None): """ src_color - a list of or a single color to be replaced by each corresponding dst_color colors spacing - spaces to be added to the image collapse_x, collapse_y - collapsable (layered) image of the given size (x, y) """ if inline or dst_color or spacing: if not Image: raise Exception("Images manipulation require PIL") filepath = String.unquoted(path).value fileext = os.path.splitext(filepath)[1].lstrip('.').lower() if mime_type: mime_type = String.unquoted(mime_type).value if not mime_type: mime_type = mimetypes.guess_type(filepath)[0] if not mime_type: mime_type = 'image/%s' % fileext path = None IMAGES_ROOT = _images_root() if callable(IMAGES_ROOT): try: _file, _storage = list(IMAGES_ROOT(filepath))[0] except IndexError: filetime = None else: filetime = getmtime(_file, _storage) if filetime is None: filetime = 'NA' elif inline or dst_color or spacing: path = _storage.open(_file) else: _path = os.path.join(IMAGES_ROOT.rstrip('/'), filepath.strip('/')) filetime = getmtime(_path) if filetime is None: filetime = 'NA' elif inline or dst_color or spacing: path = open(_path, 'rb') BASE_URL = config.IMAGES_URL or config.STATIC_URL if path: dst_colors = [ list(Color(v).value[:3]) for v in List.from_maybe(dst_color) if v ] src_color = Color.from_name( 'black') if src_color is None else src_color src_colors = [ tuple(Color(v).value[:3]) for v in List.from_maybe(src_color) ] len_colors = max(len(dst_colors), len(src_colors)) dst_colors = (dst_colors * len_colors)[:len_colors] src_colors = (src_colors * len_colors)[:len_colors] spacing = Number(0) if spacing is None else spacing spacing = [int(Number(v).value) for v in List.from_maybe(spacing)] spacing = (spacing * 4)[:4] file_name, file_ext = os.path.splitext( os.path.normpath(filepath).replace('\\', '_').replace('/', '_')) key = (filetime, src_color, dst_color, spacing) key = file_name + '-' + base64.urlsafe_b64encode( hashlib.md5(repr(key)).digest()).rstrip('=').replace('-', '_') asset_file = key + file_ext ASSETS_ROOT = config.ASSETS_ROOT or os.path.join( config.STATIC_ROOT, 'assets') asset_path = os.path.join(ASSETS_ROOT, asset_file) if os.path.exists(asset_path): filepath = asset_file BASE_URL = config.ASSETS_URL if inline: path = open(asset_path, 'rb') url = 'data:' + mime_type + ';base64,' + base64.b64encode( path.read()) else: url = '%s%s' % (BASE_URL, filepath) if cache_buster: filetime = getmtime(asset_path) url = add_cache_buster(url, filetime) else: simply_process = False image = None if fileext in ('cur', ): simply_process = True else: try: image = Image.open(path) except IOError: if not collapse_x and not collapse_y and not dst_colors: simply_process = True if simply_process: if inline: url = 'data:' + mime_type + ';base64,' + base64.b64encode( path.read()) else: url = '%s%s' % (BASE_URL, filepath) if cache_buster: filetime = getmtime(asset_path) url = add_cache_buster(url, filetime) else: width, height = collapse_x or image.size[ 0], collapse_y or image.size[1] new_image = Image.new(mode='RGBA', size=(width + spacing[1] + spacing[3], height + spacing[0] + spacing[2]), color=(0, 0, 0, 0)) for i, dst_color in enumerate(dst_colors): src_color = src_colors[i] pixdata = image.load() for _y in xrange(image.size[1]): for _x in xrange(image.size[0]): pixel = pixdata[_x, _y] if pixel[:3] == src_color: pixdata[_x, _y] = tuple( [int(c) for c in dst_color] + [pixel[3] if len(pixel) == 4 else 255]) iwidth, iheight = image.size if iwidth != width or iheight != height: cy = 0 while cy < iheight: cx = 0 while cx < iwidth: cropped_image = image.crop( (cx, cy, cx + width, cy + height)) new_image.paste(cropped_image, (int(spacing[3]), int(spacing[0])), cropped_image) cx += width cy += height else: new_image.paste(image, (int(spacing[3]), int(spacing[0]))) if not inline: try: new_image.save(asset_path) filepath = asset_file BASE_URL = config.ASSETS_URL if cache_buster: filetime = getmtime(asset_path) except IOError: log.exception("Error while saving image") inline = True # Retry inline version url = os.path.join(config.ASSETS_URL.rstrip('/'), asset_file.lstrip('/')) if cache_buster: url = add_cache_buster(url, filetime) if inline: output = six.BytesIO() new_image.save(output, format='PNG') contents = output.getvalue() output.close() url = 'data:' + mime_type + ';base64,' + base64.b64encode( contents) else: url = os.path.join(BASE_URL.rstrip('/'), filepath.lstrip('/')) if cache_buster and filetime != 'NA': url = add_cache_buster(url, filetime) if not only_path: url = 'url(%s)' % escape(url) return String.unquoted(url)
def _grid_image(left_gutter, width, right_gutter, height, columns=1, grid_color=None, baseline_color=None, background_color=None, inline=False): if not Image: raise Exception("Images manipulation require PIL") if grid_color is None: grid_color = (120, 170, 250, 15) else: c = Color(grid_color).value grid_color = (c[0], c[1], c[2], int(c[3] * 255.0)) if baseline_color is None: baseline_color = (120, 170, 250, 30) else: c = Color(baseline_color).value baseline_color = (c[0], c[1], c[2], int(c[3] * 255.0)) if background_color is None: background_color = (0, 0, 0, 0) else: c = Color(background_color).value background_color = (c[0], c[1], c[2], int(c[3] * 255.0)) _height = int(height) if height >= 1 else int(height * 1000.0) _width = int(width) if width >= 1 else int(width * 1000.0) _left_gutter = int(left_gutter) if left_gutter >= 1 else int(left_gutter * 1000.0) _right_gutter = int(right_gutter) if right_gutter >= 1 else int(right_gutter * 1000.0) if _height <= 0 or _width <= 0 or _left_gutter <= 0 or _right_gutter <= 0: raise ValueError _full_width = (_left_gutter + _width + _right_gutter) new_image = Image.new( mode='RGBA', size=(_full_width * int(columns), _height), color=background_color ) draw = ImageDraw.Draw(new_image) for i in range(int(columns)): draw.rectangle((i * _full_width + _left_gutter, 0, i * _full_width + _left_gutter + _width - 1, _height - 1), fill=grid_color) if _height > 1: draw.rectangle((0, _height - 1, _full_width * int(columns) - 1, _height - 1), fill=baseline_color) if not inline: grid_name = 'grid_' if left_gutter: grid_name += str(int(left_gutter)) + '+' grid_name += str(int(width)) if right_gutter: grid_name += '+' + str(int(right_gutter)) if height and height > 1: grid_name += 'x' + str(int(height)) key = (columns, grid_color, baseline_color, background_color) key = grid_name + '-' + base64.urlsafe_b64encode(hashlib.md5(repr(key)).digest()).rstrip('=').replace('-', '_') asset_file = key + '.png' asset_path = os.path.join(config.ASSETS_ROOT or os.path.join(config.STATIC_ROOT, 'assets'), asset_file) try: new_image.save(asset_path) except IOError: log.exception("Error while saving image") inline = True # Retry inline version url = '%s%s' % (config.ASSETS_URL, asset_file) if inline: output = six.BytesIO() new_image.save(output, format='PNG') contents = output.getvalue() output.close() url = 'data:image/png;base64,' + base64.b64encode(contents) inline = 'url("%s")' % escape(url) return String.unquoted(inline)
def ie_hex_str(color): c = Color(color).value return String(u'#%02X%02X%02X%02X' % (round(c[3] * 255), round(c[0]), round(c[1]), round(c[2])))