Python cairo.SVGSurface方法代码示例

# 需要导入模块: import cairo [as 别名]
# 或者: from cairo import SVGSurface [as 别名]
def export_svg(self, filename, size=None):
        """
        Saves the contents of the widget to svg file. The size of the image
        will be the size of the widget.
        
        @type filename: string
        @param filename: The path to the file where you want the chart to be saved.
        @type size: tuple
        @param size: Optional parameter to give the desired height and width of the image.
        """
        if size is None:
            rect = self.get_allocation()
            width = rect.width
            height = rect.height
        else:
            width, height = size
            old_alloc = self.get_allocation
            self.get_allocation = lambda: gtk.gdk.Rectangle(0, 0, width, height)
        surface = cairo.SVGSurface(filename, width, height)
        ctx = cairo.Context(surface)
        context = pangocairo.CairoContext(ctx)
        self.draw(context)
        surface.finish()
        if size is not None:
            self.get_allocation = old_alloc 

# 需要导入模块: import cairo [as 别名]
# 或者: from cairo import SVGSurface [as 别名]
def start(self, fn, w, h,):
        self.fn = fn
        if OUTPUT_FMT == 'PNG' or not fn:
            self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
                                              int(w + 1), int(h + 1))
        elif OUTPUT_FMT == 'SVG':
            self.surface = cairo.SVGSurface(self.fn, int(w + 1), int(h + 1))
        elif OUTPUT_FMT == 'PDF':
            self.surface = cairo.PDFSurface(self.fn, int(w + 1), int(h + 1))
        elif OUTPUT_FMT == 'PS':
            self.surface = cairo.PSSurface(self.fn, int(w + 1), int(h + 1))
        else:
            raise AttributeError("no such output format: '%s'" % OUTPUT_FMT)
        return self.surface 

# 需要导入模块: import cairo [as 别名]
# 或者: from cairo import SVGSurface [as 别名]
def create_svg(text, output_path, **kwargs):
    """Creates an SVG image from the given text."""

    setup_fonts_conf()

    params = make_drawparams(**kwargs)
    temp_surface = cairo.SVGSurface(None, 0, 0)
    calculated_height = draw_on_surface(temp_surface, text, params)

    real_surface = cairo.SVGSurface(output_path, params.width, calculated_height)
    print("writing", output_path)
    draw_on_surface(real_surface, text, params)
    real_surface.flush()
    real_surface.finish() 

# 需要导入模块: import cairo [as 别名]
# 或者: from cairo import SVGSurface [as 别名]
def render(self, canvas, transparent=False):
  
    x0,y0,x1,y1 = canvas.bbox('all')
    self.markers = canvas.markers
    
    W = int((x1 - x0 + 2*self.padding) * self.scale)
    H = int((y1 - y0 + 2*self.padding) * self.scale)
  
    ext = os.path.splitext(self.fname)[1].lower()

    if ext == '.svg':
      surf = cairo.SVGSurface(self.fname, W, H)
    elif ext == '.pdf':
      surf = cairo.PDFSurface(self.fname, W, H)
    elif ext in ('.ps', '.eps'):
      surf = cairo.PSSurface(self.fname, W, H)
      if ext == '.eps':
        surf.set_eps(True)
    else: # Bitmap
      surf = cairo.ImageSurface(cairo.FORMAT_ARGB32, W, H)

    self.ctx = cairo.Context(surf)
    ctx = self.ctx

    if not transparent:
      # Fill background
      ctx.rectangle(0,0, W,H)
      ctx.set_source_rgba(1.0,1.0,1.0)
      ctx.fill()

    ctx.scale(self.scale, self.scale)
    ctx.translate(-x0 + self.padding, -y0 + self.padding)

    if self.draw_bbox:
      last = len(canvas.shapes)
      for s in canvas.shapes[:last]:
        bbox = s.bbox
        r = canvas.create_rectangle(*bbox, line_color=(255,0,0, 127), fill=(0,255,0,90))

    for s in canvas.shapes:
      self.draw_shape(s)


    if ext in ('.svg', '.pdf', '.ps', '.eps'):
      surf.show_page()
    else:
      surf.write_to_png(self.fname) 

# 需要导入模块: import cairo [as 别名]
# 或者: from cairo import SVGSurface [as 别名]
def _take_screenshot(self, dummy_button):
        #print "Cheese!"
        file_name = self._get_export_file_name()
        if file_name is None:
            return

        # figure out the correct bounding box for what is visible on screen
        x1 = self._scrolled_window.get_hadjustment().value
        y1 = self._scrolled_window.get_vadjustment().value
        x2 = x1 + self._scrolled_window.get_hadjustment().page_size
        y2 = y1 + self._scrolled_window.get_vadjustment().page_size
        bounds = goocanvas.Bounds()
        bounds.x1, bounds.y1 = self.canvas.convert_from_pixels(x1, y1)
        bounds.x2, bounds.y2 = self.canvas.convert_from_pixels(x2, y2)
        dest_width = bounds.x2 - bounds.x1
        dest_height = bounds.y2 - bounds.y1
        #print bounds.x1, bounds.y1, " -> ", bounds.x2, bounds.y2

        dummy, extension = os.path.splitext(file_name)
        extension = extension.lower()
        if extension == '.eps':
            surface = cairo.PSSurface(file_name, dest_width, dest_height)
        elif extension == '.pdf':
            surface = cairo.PDFSurface(file_name, dest_width, dest_height)
        elif extension == '.svg':
            surface = cairo.SVGSurface(file_name, dest_width, dest_height)
        else:
            dialog = gtk.MessageDialog(parent  = self.canvas.get_toplevel(),
                		       flags   = gtk.DIALOG_DESTROY_WITH_PARENT,
                		       type    = gtk.MESSAGE_ERROR,
                		       buttons = gtk.BUTTONS_OK,
                		       message_format = "Unknown extension '%s' (valid extensions are '.eps', '.svg', and '.pdf')"
                                                          % (extension,))
            dialog.run()
            dialog.destroy()
            return

        # draw the canvas to a printing context
        cr = cairo.Context(surface)
        cr.translate(-bounds.x1, -bounds.y1)
        self.canvas.render(cr, bounds, self.zoom.value)
        cr.show_page()
        surface.finish() 

# 需要导入模块: import cairo [as 别名]
# 或者: from cairo import SVGSurface [as 别名]
def _save(self, fo, fmt, **kwargs):
        # save PDF/PS/SVG
        orientation = kwargs.get('orientation', 'portrait')

        dpi = 72
        self.figure.dpi = dpi
        w_in, h_in = self.figure.get_size_inches()
        width_in_points, height_in_points = w_in * dpi, h_in * dpi

        if orientation == 'landscape':
            width_in_points, height_in_points = (
                height_in_points, width_in_points)

        if fmt == 'ps':
            if not hasattr(cairo, 'PSSurface'):
                raise RuntimeError('cairo has not been compiled with PS '
                                   'support enabled')
            surface = cairo.PSSurface(fo, width_in_points, height_in_points)
        elif fmt == 'pdf':
            if not hasattr(cairo, 'PDFSurface'):
                raise RuntimeError('cairo has not been compiled with PDF '
                                   'support enabled')
            surface = cairo.PDFSurface(fo, width_in_points, height_in_points)
        elif fmt in ('svg', 'svgz'):
            if not hasattr(cairo, 'SVGSurface'):
                raise RuntimeError('cairo has not been compiled with SVG '
                                   'support enabled')
            if fmt == 'svgz':
                if isinstance(fo, str):
                    fo = gzip.GzipFile(fo, 'wb')
                else:
                    fo = gzip.GzipFile(None, 'wb', fileobj=fo)
            surface = cairo.SVGSurface(fo, width_in_points, height_in_points)
        else:
            raise ValueError("Unknown format: {!r}".format(fmt))

        # surface.set_dpi() can be used
        renderer = RendererCairo(self.figure.dpi)
        renderer.set_width_height(width_in_points, height_in_points)
        renderer.set_ctx_from_surface(surface)
        ctx = renderer.gc.ctx

        if orientation == 'landscape':
            ctx.rotate(np.pi / 2)
            ctx.translate(0, -height_in_points)
            # Perhaps add an '%%Orientation: Landscape' comment?

        self.figure.draw(renderer)

        ctx.show_page()
        surface.finish()
        if fmt == 'svgz':
            fo.close() 

# 需要导入模块: import cairo [as 别名]
# 或者: from cairo import SVGSurface [as 别名]
def _save(self, fo, fmt, **kwargs):
        # save PDF/PS/SVG
        orientation = kwargs.get('orientation', 'portrait')

        dpi = 72
        self.figure.dpi = dpi
        w_in, h_in = self.figure.get_size_inches()
        width_in_points, height_in_points = w_in * dpi, h_in * dpi

        if orientation == 'landscape':
            width_in_points, height_in_points = (
                height_in_points, width_in_points)

        if fmt == 'ps':
            if not hasattr(cairo, 'PSSurface'):
                raise RuntimeError('cairo has not been compiled with PS '
                                   'support enabled')
            surface = cairo.PSSurface(fo, width_in_points, height_in_points)
        elif fmt == 'pdf':
            if not hasattr(cairo, 'PDFSurface'):
                raise RuntimeError('cairo has not been compiled with PDF '
                                   'support enabled')
            surface = cairo.PDFSurface(fo, width_in_points, height_in_points)
        elif fmt in ('svg', 'svgz'):
            if not hasattr(cairo, 'SVGSurface'):
                raise RuntimeError('cairo has not been compiled with SVG '
                                   'support enabled')
            if fmt == 'svgz':
                if isinstance(fo, str):
                    fo = gzip.GzipFile(fo, 'wb')
                else:
                    fo = gzip.GzipFile(None, 'wb', fileobj=fo)
            surface = cairo.SVGSurface(fo, width_in_points, height_in_points)
        else:
            warnings.warn("unknown format: %s" % fmt, stacklevel=2)
            return

        # surface.set_dpi() can be used
        renderer = RendererCairo(self.figure.dpi)
        renderer.set_width_height(width_in_points, height_in_points)
        renderer.set_ctx_from_surface(surface)
        ctx = renderer.gc.ctx

        if orientation == 'landscape':
            ctx.rotate(np.pi / 2)
            ctx.translate(0, -height_in_points)
            # Perhaps add an '%%Orientation: Landscape' comment?

        self.figure.draw(renderer)

        ctx.show_page()
        surface.finish()
        if fmt == 'svgz':
            fo.close() 

# 需要导入模块: import cairo [as 别名]
# 或者: from cairo import SVGSurface [as 别名]
def _save(self, fo, fmt, **kwargs):
        # save PDF/PS/SVG
        orientation = kwargs.get('orientation', 'portrait')

        dpi = 72
        self.figure.dpi = dpi
        w_in, h_in = self.figure.get_size_inches()
        width_in_points, height_in_points = w_in * dpi, h_in * dpi

        if orientation == 'landscape':
            width_in_points, height_in_points = (
                height_in_points, width_in_points)

        if fmt == 'ps':
            if not hasattr(cairo, 'PSSurface'):
                raise RuntimeError('cairo has not been compiled with PS '
                                   'support enabled')
            surface = cairo.PSSurface(fo, width_in_points, height_in_points)
        elif fmt == 'pdf':
            if not hasattr(cairo, 'PDFSurface'):
                raise RuntimeError('cairo has not been compiled with PDF '
                                   'support enabled')
            surface = cairo.PDFSurface(fo, width_in_points, height_in_points)
        elif fmt in ('svg', 'svgz'):
            if not hasattr(cairo, 'SVGSurface'):
                raise RuntimeError('cairo has not been compiled with SVG '
                                   'support enabled')
            if fmt == 'svgz':
                if isinstance(fo, six.string_types):
                    fo = gzip.GzipFile(fo, 'wb')
                else:
                    fo = gzip.GzipFile(None, 'wb', fileobj=fo)
            surface = cairo.SVGSurface(fo, width_in_points, height_in_points)
        else:
            warnings.warn("unknown format: %s" % fmt)
            return

        # surface.set_dpi() can be used
        renderer = RendererCairo(self.figure.dpi)
        renderer.set_width_height(width_in_points, height_in_points)
        renderer.set_ctx_from_surface(surface)
        ctx = renderer.gc.ctx

        if orientation == 'landscape':
            ctx.rotate(np.pi / 2)
            ctx.translate(0, -height_in_points)
            # Perhaps add an '%%Orientation: Landscape' comment?

        self.figure.draw(renderer)

        ctx.show_page()
        surface.finish()
        if fmt == 'svgz':
            fo.close()