def convert_svg2png(infile, outfile, w, h):
"""
Converts svg files to png using Cairosvg or Inkscape
@file_path : String; the svg file absolute path
@dest_path : String; the png file absolute path
"""
if use_inkscape:
cmd = Popen(["inkscape", "-z", "-f", infile, "-e", outfile,
"-w", str(w), "-h", str(h)],
stdout=PIPE, stderr=PIPE)
cmd.communicate()
else:
handle = Rsvg.Handle()
svg = handle.new_from_file(infile)
dim = svg.get_dimensions()
img = ImageSurface(FORMAT_ARGB32, w, h)
ctx = Context(img)
ctx.scale(w / dim.width, h / dim.height)
svg.render_cairo(ctx)
png_io = BytesIO()
img.write_to_png(png_io)
with open(outfile, 'wb') as fout:
fout.write(png_io.getvalue())
svg.close()
png_io.close()
img.finish()
def convert_to_png(input_file, output_file, width=None, height=None):
"""Convert svg to png."""
if width and height:
handle = Rsvg.Handle()
svg = handle.new_from_file(input_file)
dim = svg.get_dimensions()
img = ImageSurface(FORMAT_ARGB32, width, height)
ctx = Context(img)
ctx.scale(width / dim.width, height / dim.height)
svg.render_cairo(ctx)
png_io = BytesIO()
img.write_to_png(png_io)
with open(output_file, 'wb') as fout:
fout.write(png_io.getvalue())
fout.close()
svg.close()
png_io.close()
img.finish()
else:
with open(input_file, "r") as content_file:
svg = content_file.read()
content_file.close()
fout = open(output_file, "wb")
svg2png(bytestring=bytes(svg, "UTF-8"), write_to=fout)
fout.close()
def convert_to_png(input_file, output_file, width=None, height=None):
"""Convert svg to png."""
if width and height:
handle = Rsvg.Handle()
svg = handle.new_from_file(input_file)
dim = svg.get_dimensions()
img = ImageSurface(
FORMAT_ARGB32, width, height)
ctx = Context(img)
ctx.scale(width / dim.width, height / dim.height)
svg.render_cairo(ctx)
png_io = BytesIO()
img.write_to_png(png_io)
with open(output_file, 'wb') as fout:
fout.write(png_io.getvalue())
fout.close()
svg.close()
png_io.close()
img.finish()
else:
with open(input_file, "r") as content_file:
svg = content_file.read()
content_file.close()
fout = open(output_file, "wb")
svg2png(bytestring=bytes(svg, "UTF-8"), write_to=fout)
fout.close()
def convert_svg2png(infile, outfile, w, h):
"""
Converts svg files to png using Cairosvg or Inkscape
@file_path : String; the svg file absolute path
@dest_path : String; the png file absolute path
"""
if use_inkscape:
p = Popen(["inkscape", "-z", "-f", infile, "-e", outfile,
"-w", str(w), "-h", str(h)],
stdout=PIPE, stderr=PIPE)
output, err = p.communicate()
else:
handle = Rsvg.Handle()
svg = handle.new_from_file(infile)
dim = svg.get_dimensions()
img = ImageSurface(FORMAT_ARGB32, w, h)
ctx = Context(img)
ctx.scale(w / dim.width, h / dim.height)
svg.render_cairo(ctx)
png_io = BytesIO()
img.write_to_png(png_io)
with open(outfile, 'wb') as fout:
fout.write(png_io.getvalue())
svg.close()
png_io.close()
img.finish()
def writeAsPNG(root, filename): from cairo import ImageSurface, Context, FORMAT_ARGB32 from rsvg import Handle img = ImageSurface(FORMAT_ARGB32, float(root.attrib["width"]),float(root.attrib["height"])) #test ctx = Context(img) handle = Handle(None, tostring(root)) handle.render_cairo(ctx) img.write_to_png(filename) return filename
class Canvas:
def __init__(self, width, height):
self.xform = lambda x, y: (x, y)
self.img = ImageSurface(FORMAT_RGB24, width, height)
self.ctx = Context(self.img)
self.ctx.move_to(0, 0)
self.ctx.line_to(width, 0)
self.ctx.line_to(width, height)
self.ctx.line_to(0, height)
self.ctx.line_to(0, 0)
self.ctx.set_source_rgb(1, 1, 1)
self.ctx.fill()
self.width = width
self.height = height
def fit(self, left, top, right, bottom):
xoff = left
yoff = top
xscale = self.width / float(right - left)
yscale = self.height / float(bottom - top)
if abs(xscale) > abs(yscale):
xscale *= abs(yscale) / abs(xscale)
elif abs(xscale) < abs(yscale):
yscale *= abs(xscale) / abs(yscale)
self.xform = lambda x, y: ((x - xoff) * xscale, (y - yoff) * yscale)
def dot(self, x, y, size=4, fill=(.5, .5, .5)):
x, y = self.xform(x, y)
self.ctx.arc(x, y, size/2., 0, 2*pi)
self.ctx.set_source_rgb(*fill)
self.ctx.fill()
def line(self, points, stroke=(.5, .5, .5), width=1):
self.ctx.move_to(*self.xform(*points[0]))
for (x, y) in points[1:]:
self.ctx.line_to(*self.xform(x, y))
self.ctx.set_source_rgb(*stroke)
self.ctx.set_line_cap(LINE_CAP_ROUND)
self.ctx.set_line_width(width)
self.ctx.stroke()
def save(self, filename):
self.img.write_to_png(filename)
class Canvas:
def __init__(self, width, height):
self.xform = lambda x, y: (x, y)
self.img = ImageSurface(FORMAT_RGB24, width, height)
self.ctx = Context(self.img)
self.ctx.move_to(0, 0)
self.ctx.line_to(width, 0)
self.ctx.line_to(width, height)
self.ctx.line_to(0, height)
self.ctx.line_to(0, 0)
self.ctx.set_source_rgb(1, 1, 1)
self.ctx.fill()
self.width = width
self.height = height
def fit(self, left, top, right, bottom):
xoff = left
yoff = top
xscale = self.width / float(right - left)
yscale = self.height / float(bottom - top)
if abs(xscale) > abs(yscale):
xscale *= abs(yscale) / abs(xscale)
elif abs(xscale) < abs(yscale):
yscale *= abs(xscale) / abs(yscale)
self.xform = lambda x, y: ((x - xoff) * xscale, (y - yoff) * yscale)
def dot(self, x, y, size=4, fill=(.5, .5, .5)):
x, y = self.xform(x, y)
self.ctx.arc(x, y, size / 2., 0, 2 * pi)
self.ctx.set_source_rgb(*fill)
self.ctx.fill()
def line(self, points, stroke=(.5, .5, .5), width=1):
self.ctx.move_to(*self.xform(*points[0]))
for (x, y) in points[1:]:
self.ctx.line_to(*self.xform(x, y))
self.ctx.set_source_rgb(*stroke)
self.ctx.set_line_cap(LINE_CAP_ROUND)
self.ctx.set_line_width(width)
self.ctx.stroke()
def save(self, filename):
self.img.write_to_png(filename)
def svg_to_png(filename, icondata, w=128, h=128):
if not SVG_TO_PNG:
return None
Rsvg = load_Rsvg()
log("svg_to_png%s Rsvg=%s", (filename, "%i bytes" % len(icondata), w, h),
Rsvg)
if not Rsvg:
return None
try:
from cairo import ImageSurface, Context, FORMAT_ARGB32 #pylint: disable=no-name-in-module, import-outside-toplevel
#'\sinkscape:[a-zA-Z]*=["a-zA-Z0-9]*'
img = ImageSurface(FORMAT_ARGB32, w, h)
ctx = Context(img)
handle = Rsvg.Handle.new_from_data(icondata)
dim = handle.get_dimensions()
ctx.scale(w / dim.width, h / dim.height)
handle.render_cairo(ctx)
del handle
img.flush()
buf = BytesIO()
img.write_to_png(buf)
icondata = buf.getvalue()
buf.close()
img.finish()
return icondata
except Exception:
log("svg_to_png%s", (icondata, w, h), exc_info=True)
if re.findall(INKSCAPE_RE, icondata):
#try again after stripping the bogus inkscape attributes
#as some rsvg versions can't handle that (ie: Debian Bullseye)
icondata = re.sub(INKSCAPE_RE, b"", icondata)
return svg_to_png(filename, icondata, w, h)
if icondata.find(INKSCAPE_BROKEN_SODIPODI_DTD) > 0:
icondata = icondata.replace(INKSCAPE_BROKEN_SODIPODI_DTD,
INKSCAPE_SODIPODI_DTD)
return svg_to_png(filename, icondata, w, h)
log.error("Error: failed to convert svg icon")
if filename:
log.error(" '%s':", filename)
log.error(" %i bytes, %s", len(icondata), ellipsizer(icondata))
return None
def plugmap(w, s, e, n):
west = open_df.long.min()
south = open_df.lat.min()
east = open_df.long.max()
north = open_df.lat.max()
zoom = 5 #
tiles = list(mercantile.tiles(west, south, east, north, zoom))
print(tiles)
tile_size = (256, 256)
# создаем пустое изображение в которое как мозайку будем вставлять тайлы
# для начала просто попробуем отобразить все четыре тайла в строчку
map_image = ImageSurface(FORMAT_ARGB32, tile_size[0] * len(tiles),
tile_size[1])
# создаем контекст для рисования
ctx = Context(map_image)
for idx, t in enumerate(tiles):
server = random.choice(['a', 'b', 'c'
]) # у OSM три сервера, распределяем нагрузку
url = 'http://{server}.tile.openstreetmap.org/{zoom}/{x}/{y}.png'.format(
server=server, zoom=t.z, x=t.x, y=t.y)
# запрашиваем изображение
response = urllib.request.urlopen(url)
# создаем cairo изображние
img = ImageSurface.create_from_png(io.BytesIO(response.read()))
# рисуем изображение, с правильным сдвигом по оси x
ctx.set_source_surface(img, idx * tile_size[0], 0)
ctx.paint()
# сохраняем собраное изображение в файл
with open("map.png", "wb") as f:
map_image.write_to_png(f)
[tags.pop() for x in range(len(segment) - 1)]
VERTS.extend(verts)
CODES.extend(codes)
start = end+1
ctx.new_path()
ctx.set_source_rgba(1,1,0, 0.5)
i = 0
while (i < len(CODES)):
if (CODES[i] == MOVETO):
ctx.move_to(VERTS[i][0],VERTS[i][1])
i += 1
elif (CODES[i] == LINETO):
ctx.line_to(VERTS[i][0],VERTS[i][1])
i += 1
elif (CODES[i] == CURVE3):
ctx.curve_to(VERTS[i][0],VERTS[i][1],
VERTS[i+1][0],VERTS[i+1][1], # undocumented
VERTS[i+1][0],VERTS[i+1][1])
i += 2
elif (CODES[i] == CURVE4):
ctx.curve_to(VERTS[i][0],VERTS[i][1],
VERTS[i+1][0],VERTS[i+1][1],
VERTS[i+2][0],VERTS[i+2][1])
i += 3
ctx.fill()
surface.flush()
surface.write_to_png("glyph-vector-cairo.png")
Image.open("glyph-vector-cairo.png").show()
face = Face('./Vera.ttf')
face.set_char_size( 4*48*64 )
flags = FT_LOAD_DEFAULT | FT_LOAD_NO_BITMAP
face.load_char('S', flags )
slot = face.glyph
glyph = slot.get_glyph()
stroker = Stroker( )
stroker.set(64, FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0 )
glyph.stroke( stroker , True )
blyph = glyph.to_bitmap(FT_RENDER_MODE_NORMAL, Vector(0,0), True )
bitmap = blyph.bitmap
width, rows, pitch = bitmap.width, bitmap.rows, bitmap.pitch
surface = ImageSurface(FORMAT_ARGB32, 600, 800)
ctx = Context(surface)
Z = make_image_surface(bitmap)
ctx.set_source_surface(Z, 0, 0)
scale = 640.0 / rows
patternZ = ctx.get_source()
SurfacePattern.set_filter(patternZ, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0/scale,1.0/scale)
scalematrix.translate(-(300.0 - width *scale /2.0 ), -80)
patternZ.set_matrix(scalematrix)
ctx.set_source_rgb (0 , 0, 1)
ctx.mask(patternZ)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-outline-cairo.png")
Image.open("glyph-outline-cairo.png").show()
class Canvas:
def __init__(self,
width: int,
height: Optional[int] = None,
*,
normalise: bool = True):
if height is None:
height = width
self._width = width
self._height = height
self._surface = ImageSurface(FORMAT_ARGB32, width, height)
self._context = Context(self._surface)
self._normalise = normalise
if self._normalise:
self.scale(self._width, self._height)
@property
def width(self) -> int:
return self._width if not self._normalise else 1
@property
def height(self) -> int:
return self._height if not self._normalise else 1
# TODO depreciate
@property
def context(self) -> Context: # pragma: no cover
return self._context
def save(self) -> None:
self._context.save()
def restore(self) -> None:
self._context.restore()
# Transformation
def rotate(self, angle: float) -> None:
self._context.rotate(angle)
def translate(self, x: float, y: float) -> None:
self._context.translate(x, y)
def scale(self, width: int, height: int) -> None:
self._context.scale(width, height)
def set_line_width(self, width: float) -> None:
self._context.set_line_width(width)
# Colour functionality
def set_colour(self, colour: Colour) -> None:
self._context.set_source_rgba(colour.red, colour.blue, colour.green,
colour.alpha)
def set_grey(self, colour_value: float, alpha: float = 1) -> None:
colour = Colour(*(colour_value, ) * 3, alpha)
self.set_colour(colour)
def set_black(self) -> None:
self.set_colour(BLACK)
def set_white(self) -> None:
self.set_colour(WHITE)
def set_background(self, colour: Colour) -> None:
self._context.rectangle(0, 0, self.width, self.height)
self.set_colour(colour)
self._context.fill()
def set_line_cap(self, line_cap: LineCap) -> None:
self._context.set_line_cap(line_cap.value)
def set_line_join(self, line_join: LineJoin) -> None:
self._context.set_line_join(line_join.value)
def set_fill_rule(self, file_rule: FillRule) -> None:
self._context.set_fill_rule(file_rule.value)
# Render methods
def fill(self, preserve: bool = False) -> None:
if not preserve:
self._context.fill()
else:
self._context.fill_preserve()
def stroke(self, preserve: bool = False) -> None:
if not preserve:
self._context.stroke()
else:
self._context.stroke_preserve()
def clip(self) -> None:
self._context.clip()
def _draw_path(self, path: Iterable[Point], close_path: bool) -> None:
self._context.new_sub_path()
for p in path:
self._context.line_to(*p)
if close_path:
self._context.close_path()
def draw_path(self,
path: Iterable[PointType],
close_path: bool = False) -> None:
points = (p if isinstance(p, Point) else Point(*p) for p in path)
self._draw_path(points, close_path)
def draw_polygon(self, polygon: Polygon) -> None:
self._draw_path(polygon.points, close_path=True)
def draw_circle(self,
circle: Circle,
fill: bool = False,
stroke: bool = True) -> None:
self._context.new_sub_path()
self._context.arc(*circle.centre, circle.radius, 0, 2 * pi)
def write_to_png(self, file_name: str) -> None:
self._surface.write_to_png(file_name)
offset=pitch,
strides=[pitch * 3, 1])
ndB = ndarray(shape=(rows, width),
buffer=copybuffer,
dtype=ubyte,
order='C',
offset=2 * pitch,
strides=[pitch * 3, 1])
ndI = ndarray(shape=(rows, width),
buffer=I.get_data(),
dtype=uint32,
order='C',
strides=[I.get_stride(), 4])
# 255 * 2**24 = opaque
ndI[:, :] = 255 * 2**24 + ndR[:, :] * 2**16 + ndG[:, :] * 2**8 + ndB[:, :]
I.mark_dirty()
ctx.set_source_surface(I, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
# Re-use the sane scale (LVD_V taller than LCD),
# but adjust vertical position to line up mid-height of glyphs
adjust = (rows - rows_old) * 240.0 / rows
scalematrix.translate(-400, adjust)
pattern.set_matrix(scalematrix)
ctx.paint()
#
surface.flush()
surface.write_to_png("glyph-lcd-cairo.png")
Image.open("glyph-lcd-cairo.png").show()
offset=0,
strides=[pitch*3, 1])
ndG = ndarray(shape=(rows,width), buffer=copybuffer,
dtype=ubyte, order='C',
offset=pitch,
strides=[pitch*3, 1])
ndB = ndarray(shape=(rows,width), buffer=copybuffer,
dtype=ubyte, order='C',
offset=2*pitch,
strides=[pitch*3, 1])
ndI = ndarray(shape=(rows,width), buffer=I.get_data(),
dtype=uint32, order='C',
strides=[I.get_stride(), 4])
# 255 * 2**24 = opaque
ndI[:,:] = 255 * 2**24 + ndR[:,:] * 2**16 + ndG[:,:] * 2**8 + ndB[:,:]
I.mark_dirty()
ctx.set_source_surface(I, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
# Re-use the sane scale (LVD_V taller than LCD),
# but adjust vertical position to line up mid-height of glyphs
adjust = (rows - rows_old) * 240.0 /rows
scalematrix.translate(-400, adjust)
pattern.set_matrix(scalematrix)
ctx.paint()
#
surface.flush()
surface.write_to_png("glyph-lcd-cairo.png")
Image.open("glyph-lcd-cairo.png").show()
I = ImageSurface(FORMAT_ARGB32, width, rows)
try:
ndI = np.ndarray(shape=(rows,width), buffer=I.get_data(),
dtype=np.uint32, order='C',
strides=[I.get_stride(), 4])
except NotImplementedError:
raise SystemExit("For python 3.x, you need pycairo >= 1.11+ (from https://github.com/pygobject/pycairo)")
# Although both are 32-bit, cairo is host-order while
# freetype is small endian.
ndI[:,:] = bitmap[:,:,3] * 2**24 + bitmap[:,:,2] * 2**16 + bitmap[:,:,1] * 2**8 + bitmap[:,:,0]
# ndI[...] = (bitmap*(1,2**8,2**16,2**24)).sum(axis=-1)
I.mark_dirty()
surface = ImageSurface(FORMAT_ARGB32, 2*width, rows)
ctx = Context(surface)
ctx.set_source_surface(I, 0, 0)
ctx.paint()
ctx.set_source_surface(I, width/2, 0)
ctx.paint()
ctx.set_source_surface(I, width , 0)
ctx.paint()
surface.write_to_png("emoji-color-cairo.png")
Image.open("emoji-color-cairo.png").show()
FT_LOAD_TARGET_MONO )
bitmap = face.glyph.bitmap
width = face.glyph.bitmap.width
rows = face.glyph.bitmap.rows
pitch = face.glyph.bitmap.pitch
glyph_surface = make_image_surface(face.glyph.bitmap)
surface = ImageSurface(FORMAT_ARGB32, 800, 600)
ctx = Context(surface)
ctx.rectangle(0,0,800,600)
ctx.set_line_width(0)
ctx.set_source_rgb (0.5 , 0.5, 0.5)
ctx.fill()
#
scale = 480.0 / rows
ctx.set_source_surface(glyph_surface, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0/scale,1.0/scale)
scalematrix.translate(-(400.0 - width *scale /2.0 ), -60)
pattern.set_matrix(scalematrix)
ctx.set_source_rgb (0 , 0, 1)
ctx.mask(pattern)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-mono+alpha-cairo.png")
Image.open("glyph-mono+alpha-cairo.png").show()
raise RuntimeError('pitch != width * 4 for color bitmap: Please report this.')
bitmap = np.array(bitmap.buffer, dtype=np.uint8).reshape((bitmap.rows,bitmap.width,4))
I = ImageSurface(FORMAT_ARGB32, width, rows)
try:
ndI = np.ndarray(shape=(rows,width), buffer=I.get_data(),
dtype=np.uint32, order='C',
strides=[I.get_stride(), 4])
except NotImplementedError:
raise SystemExit("For python 3.x, you need pycairo >= 1.11+ (from https://github.com/pygobject/pycairo)")
# Although both are 32-bit, cairo is host-order while
# freetype is small endian.
ndI[:,:] = bitmap[:,:,3] * 2**24 + bitmap[:,:,2] * 2**16 + bitmap[:,:,1] * 2**8 + bitmap[:,:,0]
I.mark_dirty()
surface = ImageSurface(FORMAT_ARGB32, 2*width, rows)
ctx = Context(surface)
ctx.set_source_surface(I, 0, 0)
ctx.paint()
ctx.set_source_surface(I, width/2, 0)
ctx.paint()
ctx.set_source_surface(I, width , 0)
ctx.paint()
surface.write_to_png("emoji-color-cairo.png")
Image.open("emoji-color-cairo.png").show()
face.load_char('S', FT_LOAD_RENDER | FT_LOAD_TARGET_MONO)
bitmap = face.glyph.bitmap
width = face.glyph.bitmap.width
rows = face.glyph.bitmap.rows
pitch = face.glyph.bitmap.pitch
glyph_surface = make_image_surface(face.glyph.bitmap)
surface = ImageSurface(FORMAT_ARGB32, 800, 600)
ctx = Context(surface)
ctx.rectangle(0, 0, 800, 600)
ctx.set_line_width(0)
ctx.set_source_rgb(0.5, 0.5, 0.5)
ctx.fill()
#
scale = 480.0 / rows
ctx.set_source_surface(glyph_surface, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0 / scale, 1.0 / scale)
scalematrix.translate(-(400.0 - width * scale / 2.0), -60)
pattern.set_matrix(scalematrix)
ctx.set_source_rgb(0, 0, 1)
ctx.mask(pattern)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-mono+alpha-cairo.png")
Image.open("glyph-mono+alpha-cairo.png").show()
ctx.set_source_rgb(1, 1, 0)
ctx.mask(patternF)
ctx.fill()
scalematrix.translate(+400, 0)
patternF.set_matrix(scalematrix)
ctx.mask(patternF)
ctx.fill()
# stroke on top
ctx.set_source_surface(Z, 0, 0)
patternZ = ctx.get_source()
SurfacePattern.set_filter(patternZ, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0 / scale, 1.0 / scale)
scalematrix.translate(-(600.0 - widthZ * scale / 2.0), -50)
patternZ.set_matrix(scalematrix)
ctx.set_source_rgb(1, 0, 0)
ctx.mask(patternZ)
ctx.fill()
scalematrix.translate(-400, 0)
patternZ.set_matrix(scalematrix)
ctx.mask(patternZ)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-color-cairo.png")
Image.open("glyph-color-cairo.png").show()
Z = ImageSurface(FORMAT_A8, int(round(height+0.5)), int(round(width+0.5)))
ctx = Context(Z)
if (wantRotate):
ctx.set_matrix(Matrix(xx=0.0,xy=-1.0,yx=1.0,yy=0.0,x0=height))
# Second pass for actual rendering
x, y = -sc(glyph_extents[0].x_bearing + positions[0].x_offset), height + sc(min_iy)
if (emulate_default):
x = 16
y = sc(font_extents.asscender) + 16
if (wantTTB):
x = sc(max_ix)
y = sc(max_iy)
for info,pos,extent in zip(infos, positions, glyph_extents):
face.load_glyph(info.codepoint)
x += sc(extent.x_bearing + pos.x_offset)
y -= sc(extent.y_bearing + pos.y_offset)
# cairo does not like zero-width bitmap from the space character!
if (face.glyph.bitmap.width > 0):
glyph_surface = make_image_surface(face.glyph.bitmap)
ctx.set_source_surface(glyph_surface, x, y)
ctx.paint()
x += sc(pos.x_advance - extent.x_bearing - pos.x_offset)
y -= sc(pos.y_advance - extent.y_bearing - pos.y_offset)
Z.flush()
Z.write_to_png("hb-view.png")
Image.open("hb-view.png").show()
### Derived from freetype-py:examples/hello-world-cairo.py ends.
#####################################################################
baseline = max(baseline, max(0,-(slot.bitmap_top-bitmap.rows)))
kerning = face.get_kerning(previous, c)
width += (slot.advance.x >> 6) + (kerning.x >> 6)
previous = c
Z = ImageSurface(FORMAT_A8, width, height)
ctx = Context(Z)
# Second pass for actual rendering
x, y = 0, 0
previous = 0
for c in text:
face.load_char(c)
bitmap = slot.bitmap
top = slot.bitmap_top
left = slot.bitmap_left
w,h = bitmap.width, bitmap.rows
y = height-baseline-top
kerning = face.get_kerning(previous, c)
x += (kerning.x >> 6)
# cairo does not like zero-width bitmap from the space character!
if (bitmap.width > 0):
glyph_surface = make_image_surface(face.glyph.bitmap)
ctx.set_source_surface(glyph_surface, x, y)
ctx.paint()
x += (slot.advance.x >> 6)
previous = c
Z.flush()
Z.write_to_png("hello-world-cairo.png")
Image.open("hello-world-cairo.png").show()
y0 = H//2 + (random.uniform()-.1)*50
for dx,dy in spiral():
c = .25+.75*random.random()
x = int(x0+dx)
y = int(y0+dy)
checked = False
I.flush()
if not (x <= w//2 or y <= h//2 or x >= (W-w//2) or y >= (H-h//2)):
ndI = ndarray(shape=(h,w), buffer=I.get_data(), dtype=ubyte, order='C',
offset=(x-w//2) + I.get_stride() * (y-h//2),
strides=[I.get_stride(), 1])
ndL = ndarray(shape=(h,w), buffer=L.get_data(), dtype=ubyte, order='C',
strides=[L.get_stride(), 1])
if ((ndI * ndL).sum() == 0):
checked = True
new_region = RectangleInt(x-w//2, y-h//2, w, h)
if (checked or ( drawn_regions.contains_rectangle(new_region) == REGION_OVERLAP_OUT )):
ctxI.set_source_surface(L, 0, 0)
pattern = ctxI.get_source()
scalematrix = Matrix()
scalematrix.scale(1.0,1.0)
scalematrix.translate(w//2 - x, h//2 - y)
pattern.set_matrix(scalematrix)
ctxI.set_source_rgba(c,c,c,c)
ctxI.mask(pattern)
drawn_regions.union(new_region)
break
I.flush()
I.write_to_png("wordle-cairo.png")
Image.open("wordle-cairo.png").show()
ctx.set_source_rgb (1 , 1, 0)
ctx.mask(patternF)
ctx.fill()
scalematrix.translate(+400,0)
patternF.set_matrix(scalematrix)
ctx.mask(patternF)
ctx.fill()
# stroke on top
ctx.set_source_surface(Z, 0, 0)
patternZ = ctx.get_source()
SurfacePattern.set_filter(patternZ, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0/scale,1.0/scale)
scalematrix.translate(-(600.0 - widthZ *scale /2.0 ), -50)
patternZ.set_matrix(scalematrix)
ctx.set_source_rgb (1 , 0, 0)
ctx.mask(patternZ)
ctx.fill()
scalematrix.translate(-400,0)
patternZ.set_matrix(scalematrix)
ctx.mask(patternZ)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-color-cairo.png")
Image.open("glyph-color-cairo.png").show()
def _to_png(self,
font,
font_position=None,
dst=None,
limit=800,
size=1500,
tab_width=1500,
padding_characters=""):
"""Use HB, FreeType and Cairo to produce a png for a table.
Parameters
----------
font: DFont
font_position: str
Label indicating which font has been used.
dst: str
Path to output image. If no path is given, return in-memory
"""
# TODO (M Foley) better packaging for pycairo, freetype-py
# and uharfbuzz.
# Users should be able to pip install these bindings without needing
# to install the correct libs.
# A special mention to the individuals who maintain these packages. Using
# these dependencies has sped up the process of creating diff images
# significantly. It's an incredible age we live in.
y_tab = int(1500 / 25)
x_tab = int(tab_width / 64)
width, height = 1024, 200
cells_per_row = int((width - x_tab) / x_tab)
# Compute height of image
x, y, baseline = x_tab, 0, 0
for idx, row in enumerate(self._data[:limit]):
x += x_tab
if idx % cells_per_row == 0:
y += y_tab
x = x_tab
height += y
height += 100
# draw image
Z = ImageSurface(FORMAT_ARGB32, width, height)
ctx = Context(Z)
ctx.rectangle(0, 0, width, height)
ctx.set_source_rgb(1, 1, 1)
ctx.fill()
# label image
ctx.set_font_size(30)
ctx.set_source_rgb(0.5, 0.5, 0.5)
ctx.move_to(x_tab, 50)
ctx.show_text("{}: {}".format(self.table_name, len(self._data)))
ctx.move_to(x_tab, 100)
if font_position:
ctx.show_text("Font Set: {}".format(font_position))
if len(self._data) > limit:
ctx.set_font_size(20)
ctx.move_to(x_tab, 150)
ctx.show_text(
"Warning: {} different items. Only showing most serious {}".
format(len(self._data), limit))
hb.ot_font_set_funcs(font.hbfont)
# Draw glyphs
x, y, baseline = x_tab, 200, 0
x_pos = x_tab
y_pos = 200
for idx, row in enumerate(self._data[:limit]):
string = "{}{}{}".format(padding_characters, row['string'],
padding_characters)
buf = self._shape_string(font, string, row['features'])
char_info = buf.glyph_infos
char_pos = buf.glyph_positions
for info, pos in zip(char_info, char_pos):
gid = info.codepoint
font.ftfont.load_glyph(gid, flags=6)
bitmap = font.ftslot.bitmap
if bitmap.width > 0:
ctx.set_source_rgb(0, 0, 0)
glyph_surface = _make_image_surface(
font.ftfont.glyph.bitmap, copy=False)
ctx.set_source_surface(
glyph_surface,
x_pos + font.ftslot.bitmap_left + (pos.x_offset / 64.),
y_pos - font.ftslot.bitmap_top - (pos.y_offset / 64.))
glyph_surface.flush()
ctx.paint()
x_pos += (pos.x_advance) / 64.
y_pos += (pos.y_advance) / 64.
x_pos += x_tab - (x_pos % x_tab)
if idx % cells_per_row == 0:
# add label
if font_position:
ctx.set_source_rgb(0.5, 0.5, 0.5)
ctx.set_font_size(10)
ctx.move_to(width - 20, y_pos)
ctx.rotate(1.5708)
ctx.show_text(font_position)
ctx.set_source_rgb(0, 0, 0)
ctx.rotate(-1.5708)
# Start a new row
y_pos += y_tab
x_pos = x_tab
Z.flush()
if dst:
Z.write_to_png(dst)
else:
img = StringIO()
Z.write_to_png(img)
return Image.open(img)
def _paint_panel(self, key, width, height, panel_h):
self.db.IUD("update web_stat_panels set HEIGHT = %s where ID = %s" % (panel_h, key))
self.db.commit()
color_x_line = (0.7, 0.7, 0.7)
color_x_line_2 = (0.9, 0.9, 0.9)
color_y_line = (0.9, 0.9, 0.9)
color_y_line_date = (0.7, 0.7, 0.7)
color_border = (0.5, 0.5, 0.5)
left = 40
right = 10
bottom = 15
var_ids = "0"
series = [0, 0, 0, 0]
typ = 0
for row in self.db.select(
"select SERIES_1, SERIES_2, SERIES_3, SERIES_4, TYP " " from web_stat_panels " " where ID = " + str(key)
):
series = row
var_ids = "%s, %s, %s, %s" % row[0:4]
typ = row[4]
width, height = int(width), int(height)
if width <= 0:
width = 300
if height <= 0:
height = 150
interval = self.param("range")
delta_x = 1
if interval == "-6 hour":
delta_x = 6 * 3600
elif interval == "-12 hour":
delta_x = 12 * 3600
elif interval == "-1 day":
delta_x = 24 * 3600
elif interval == "-3 day":
delta_x = 3 * 24 * 3600
elif interval == "-7 day":
delta_x = 7 * 24 * 3600
elif interval == "-14 day":
delta_x = 14 * 24 * 3600
elif interval == "-30 day":
delta_x = 30 * 24 * 3600
elif interval == "-90 day":
delta_x = 3 * 30 * 24 * 3600
elif interval == "-180 day":
delta_x = 6 * 30 * 24 * 3600
elif interval == "-360 day":
delta_x = 12 * 30 * 24 * 3600
min_x = int(self.param("start")) - delta_x // 2
max_x = min_x + delta_x
min_x_q = min_x - delta_x # // 100
max_x_q = max_x + delta_x # // 100
max_y = -9999
min_y = 9999
# Делаем полную выборку данных. Выкидываем подозрительные точки и
# собираем статистику.
prev_vals = [-9999] * 4
chart_data = [[], [], [], []]
zoom_step = delta_x / (width * 5)
if zoom_step < 1 or typ != 0:
zoom_step = 1
x_min_max_values = []
mi_x = max_x_q
ma_x = min_x_q
tt = -100
for row in self.db.select(
"select UNIX_TIMESTAMP(CHANGE_DATE) D, MIN(VALUE) + (MAX(VALUE) - MIN(VALUE)) VALUE, VARIABLE_ID "
" from core_variable_changes "
" where VARIABLE_ID in (%s) "
" and CHANGE_DATE >= FROM_UNIXTIME(%s) "
" and CHANGE_DATE <= FROM_UNIXTIME(%s) "
" group by 3, ROUND(UNIX_TIMESTAMP(CHANGE_DATE) / %s)"
" order by 3, 1 " % (var_ids, min_x_q, max_x_q, zoom_step)
):
ind = series.index(row[2])
chart_data[ind] += [row]
if row[0] > min_x and row[0] < max_x:
max_y = max(max_y, row[1])
min_y = min(min_y, row[1])
if tt == -100:
tt = row[2]
if tt != row[2]:
v = [tt, mi_x, ma_x]
x_min_max_values += [v]
mi_x = max_x_q
ma_x = min_x_q
tt = row[2]
if row[0] < mi_x:
mi_x = row[0]
if row[0] > ma_x:
ma_x = row[0]
if tt != -1:
v = [tt, mi_x, ma_x]
x_min_max_values += [v]
# print(x_min_max_values)
# print(series)
"""
for row in self.db.select("select UNIX_TIMESTAMP(CHANGE_DATE) D, VALUE, VARIABLE_ID, ID "
" from core_variable_changes "
" where VARIABLE_ID in (" + var_ids + ") "
" and CHANGE_DATE >= FROM_UNIXTIME(%s) "
" and CHANGE_DATE <= FROM_UNIXTIME(%s) "
"order by CHANGE_DATE " % (min_x_q, max_x_q)):
"""
"""
try:
self.db.IUD("set @rn := 0")
sql = ("select UNIX_TIMESTAMP(CHANGE_DATE) D, VALUE, VARIABLE_ID, ID "
" from core_variable_changes "
" where VARIABLE_ID in (" + var_ids + ") "
" and CHANGE_DATE >= FROM_UNIXTIME(%s) "
" and CHANGE_DATE <= FROM_UNIXTIME(%s) "
"order by CHANGE_DATE " % (min_x_q, max_x_q))
for c in self.db.select("select count(*) c "
" from core_variable_changes "
" where VARIABLE_ID in (" + var_ids + ") "
" and CHANGE_DATE >= FROM_UNIXTIME(%s) "
" and CHANGE_DATE <= FROM_UNIXTIME(%s) " % (min_x_q, max_x_q)):
cou = c[0]
ccc = 1000 * 4
if cou > ccc:
sql = ("select UNIX_TIMESTAMP(CHANGE_DATE) D, VALUE, VARIABLE_ID, ID, @rn := @rn + 1 rownum "
" from core_variable_changes "
" where VARIABLE_ID in (" + var_ids + ") "
" and CHANGE_DATE >= FROM_UNIXTIME(%s) "
" and CHANGE_DATE <= FROM_UNIXTIME(%s) "
"having mod(rownum, %s) = 0 "
"order by VARIABLE_ID, CHANGE_DATE " % (min_x_q, max_x_q, math.ceil(cou / ccc)))
for row in self.db.select(sql):
ind = series.index(row[2])
prev_vals[ind] = row[1]
if abs(prev_vals[ind] - row[1]) < 10:
chart_data[ind] += [row]
if row[0] > min_x and row[0] < max_x:
max_y = max(max_y, row[1])
min_y = min(min_y, row[1])
prev_vals[ind] = row[1]
except:
pass
"""
if min_y is None or max_y is None or min_y == 9999 or max_y == -9999 or min_y == max_y:
max_y = 1
min_y = 0
min_y = math.floor(min_y)
max_y = math.ceil(max_y)
if typ == 2:
if min_y < 0 and max_y < 0:
max_y = 0
elif min_y > 0 and max_y > 0:
min_y = 0
# Определяем цвета
colors = [[1, 0, 0], [0, 0.65, 0.31], [0, 0, 1], [1, 0, 1]]
off_y = (max_y - min_y) / 10
min_y -= off_y
max_y += off_y
try:
kx = (max_x - min_x) / (width - left - right)
ky = (max_y - min_y) / (height - bottom)
if ky == 0:
ky = 1
except:
kx, ky = 1, 1
img = ImageSurface(FORMAT_ARGB32, width, height)
ctx = Context(img)
width -= right
ctx.set_line_width(1)
# Рисуем сетку
ctx.set_font_size(12)
try:
b_w, b_h = ctx.text_extents("00-00-0000")[2:4]
# Метки на оси Y
count = math.ceil(max_y) - math.ceil(min_y)
space_count = math.ceil(count / ((height - bottom) / (b_h * 1.5)))
sc = 0
for i in range(math.ceil(min_y), math.ceil(max_y)):
if sc == 0:
y = height - bottom + (min_y - i) / ky
ctx.set_source_rgb(*(color_x_line))
ctx.move_to(left, y)
ctx.line_to(width, y)
ctx.stroke()
ctx.set_source_rgb(0, 0, 0)
num = str(i)
tw, th = ctx.text_extents(num)[2:4]
ctx.move_to(left - 5 - tw, y + th // 2)
ctx.show_text(num)
sc = space_count
sc -= 1
# Метки на оси Х
x_step = 3600
if interval == "-6 hour" or interval == "-12 hour" or interval == "-1 day":
# Дополнительно метки часов
x_step = 3600
for i in range(math.ceil(min_x / x_step), math.ceil(max_x / x_step)):
x = (i * x_step - min_x) / kx + left
ctx.set_source_rgb(*(color_x_line_2))
ctx.move_to(x, 0)
ctx.line_to(x, height - bottom)
ctx.stroke()
num = datetime.datetime.fromtimestamp(i * x_step).strftime("%H")
tw, th = ctx.text_extents(num)[2:4]
ctx.move_to(x + 2, height - bottom - 3)
ctx.set_source_rgb(*(color_x_line))
ctx.show_text(num)
x_step = 3600 * 24
space_count = 1
count = math.ceil(max_x / x_step) - math.ceil(min_x / x_step)
try:
if (width / count) < b_w:
space_count = 2
except:
pass
sc = 0
tz = 3600 * 2
tx_prev = -100
for i in range(math.ceil(min_x / x_step), math.ceil(max_x / x_step) + 1):
if sc == 0:
d_i = datetime.datetime.fromtimestamp(i * x_step)
x = (i * x_step - min_x - tz) / kx + left
ctx.set_source_rgb(0, 0, 0)
num = d_i.strftime("%d-%m-%Y %H")
x -= (int(d_i.strftime("%H")) * 3600 - tz) / kx
tw, th = ctx.text_extents(num)[2:4]
tx = x - tw // 2
ctx.move_to(tx, height - bottom + th + 5)
if tx - tx_prev > tw:
ctx.show_text(num)
tx_prev = tx
ctx.set_source_rgb(*(color_y_line_date))
else:
ctx.set_source_rgb(*(color_y_line))
if x >= left and x < width:
ctx.move_to(x, 0)
ctx.line_to(x, height - bottom)
ctx.stroke()
sc = space_count
sc -= 1
except Exception as e:
pass
# Рисуем верхний и правый бордер
ctx.set_source_rgb(*color_border)
ctx.move_to(left, 0)
ctx.line_to(width, 0)
ctx.line_to(width, height - bottom)
ctx.stroke()
# Рисуем сами графики
ctx.rectangle(left, 0, width - left, height)
ctx.clip()
is_first = True
currVarID = -1
prevX = -1
if typ == 0: # Линейная
for ind in range(4):
"""
if len(chart_data[ind]) > 0:
for i in range(len(chart_data[ind]) - 1):
chart_data[ind][i] = list(chart_data[ind][i])
r1 = chart_data[ind][i]
r2 = chart_data[ind][i + 1]
chart_data[ind][i][0] += (r2[0] - r1[0]) / 2
chart_data[ind][i][1] += (r2[1] - r1[1]) / 2
"""
ctx.set_source_rgb(*colors[ind])
is_first = True
for row in chart_data[ind]:
x = (row[0] - min_x) / kx + left
y = height - bottom - (row[1] - min_y) / ky
if is_first:
ctx.move_to(x, y)
else:
if row[0] - prevX > 10000:
ctx.move_to(x, y)
else:
ctx.line_to(x, y)
prevX = row[0]
is_first = False
ctx.stroke()
elif typ == 1: # Точечная
for ind in range(4):
if chart_data[ind]:
ctx.set_source_rgb(*colors[ind])
for row in chart_data[ind]:
x = (row[0] - min_x) / kx + left
y = height - bottom - (row[1] - min_y) / ky
ctx.rectangle(x - 3, y - 3, 6, 6)
ctx.fill()
elif typ == 2: # Столбчатая
cy = height - bottom - (-min_y) / ky
for ind in range(4):
for row in chart_data[ind]:
if currVarID != row[2]:
ctx.fill()
for i in range(4):
if series[i] == row[2]:
ctx.set_source_rgb(*colors[i])
x = (row[0] - min_x) / kx + left
y = height - bottom - (row[1] - min_y) / ky
ctx.rectangle(x - 5, y, 10, cy - y)
currVarID = row[2]
ctx.fill()
else: # Линейчастая
# one_vals = self._get_one_val(series, min_x_q, max_x_q)
one_vals = self._get_one_val(series, x_min_max_values, min_x_q, max_x_q)
for ind in range(4):
if series[ind]:
is_now = True
for r in one_vals[ind]:
if r[4] == 1:
chart_data[ind].insert(0, r)
else:
chart_data[ind] += [r]
is_now = False
if is_now:
if len(chart_data[ind]) > 0:
r = list(chart_data[ind][len(chart_data[ind]) - 1])
r[0] = datetime.datetime.now().timestamp()
chart_data[ind] += [r]
color = colors[ind]
color_fill = color.copy()
color_fill += [0.3]
is_first = True
y0 = height - bottom + min_y / ky
for row in chart_data[ind]:
x = (row[0] - min_x) / kx + left
y = height - bottom - (row[1] - min_y) / ky
if is_first:
is_first = False
else:
ctx.set_source_rgb(*color)
ctx.move_to(prevX, prevY)
ctx.line_to(x, prevY)
ctx.line_to(x, y)
ctx.stroke()
ctx.set_source_rgba(*color_fill)
rx, ry, rw, rh = prevX, y0, x - prevX, prevY - y0
ctx.rectangle(rx, ry, rw, rh)
ctx.fill()
prevX, prevY = x, y
# Рисуем оси
ctx.set_source_rgb(0, 0, 0)
ctx.move_to(left, 0)
ctx.line_to(left, height - bottom)
ctx.line_to(width, height - bottom)
ctx.stroke()
# ---------------------------
del ctx
byt = BytesIO()
img.write_to_png(byt)
byt.seek(0)
return byt.read()
