static/pyodide/matplotlib_pyodide-0.2.1-py3-none-any.whl

PK2RnX6<>L<EFBFBD><00>matplotlib_pyodide/__init__.pyfrom importlib.metadata import PackageNotFoundError, version

try:
    __version__ = version("matplotlib_pyodide")
except PackageNotFoundError:
    # package is not installed
    pass
PK2RnX<6E><58>}<7D>@<00>@%matplotlib_pyodide/browser_backend.pyimport math

from js import document
from matplotlib.backend_bases import FigureCanvasBase, NavigationToolbar2, TimerBase

from pyodide.ffi.wrappers import (
    add_event_listener,
    clear_interval,
    clear_timeout,
    set_interval,
    set_timeout,
)

try:
    from js import devicePixelRatio as DEVICE_PIXEL_RATIO
except ImportError:
    DEVICE_PIXEL_RATIO = 1


class FigureCanvasWasm(FigureCanvasBase):
    supports_blit = False

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        self._idle_scheduled = False
        self._id = "matplotlib_" + hex(id(self))[2:]
        self._title = ""
        self._ratio = 1
        matplotlib_figure_styles = self._add_matplotlib_styles()
        if document.getElementById("matplotlib-figure-styles") is None:
            document.head.appendChild(matplotlib_figure_styles)

    def _add_matplotlib_styles(self):
        toolbar_buttons_css_content = """
            button.matplotlib-toolbar-button {
                font-size: 14px;
                color: #495057;
                text-transform: uppercase;
                background: #e9ecef;
                padding: 9px 18px;
                border: 1px solid #fff;
                border-radius: 4px;
                transition-duration: 0.4s;
            }

            button.matplotlib-toolbar-button#text {
                font-family: -apple-system, BlinkMacSystemFont,
                "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell,
                "Fira Sans", "Droid Sans", "Helvetica Neue", Arial,
                sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
                "Segoe UI Symbol";
            }

            button.matplotlib-toolbar-button:hover {
                color: #fff;
                background: #495057;
            }
        """
        toolbar_buttons_style_element = document.createElement("style")
        toolbar_buttons_style_element.id = "matplotlib-figure-styles"
        toolbar_buttons_css = document.createTextNode(toolbar_buttons_css_content)
        toolbar_buttons_style_element.appendChild(toolbar_buttons_css)
        return toolbar_buttons_style_element

    def get_element(self, name):
        """
        Looks up an HTMLElement created for this figure.
        """
        # TODO: Should we store a reference here instead of always looking it
        # up? I'm a little concerned about weird Python/JS
        # cross-memory-management issues...
        return document.getElementById(self._id + name)

    def get_dpi_ratio(self, context):
        """
        Gets the ratio of physical pixels to logical pixels for the given HTML
        Canvas context.

        This is typically 2 on a HiDPI ("Retina") display, and 1 otherwise.
        """
        backing_store = (
            getattr(context, "backingStorePixelRatio", 0)
            or getattr(context, "webkitBackingStorePixel", 0)
            or getattr(context, "mozBackingStorePixelRatio", 0)
            or getattr(context, "msBackingStorePixelRatio", 0)
            or getattr(context, "oBackingStorePixelRatio", 0)
            or getattr(context, "backendStorePixelRatio", 0)
            or 1
        )
        return DEVICE_PIXEL_RATIO / backing_store

    def show(self, *args, **kwargs):
        # If we've already shown this canvas elsewhere, don't create a new one,
        # just reuse it and scroll to the existing one.
        existing = self.get_element("")
        if existing is not None:
            self.draw_idle()
            existing.scrollIntoView()
            return

        # Disable the right-click context menu.
        # Doesn't work in all browsers.
        def ignore(event):
            event.preventDefault()
            return False

        # Create the main canvas and determine the physical to logical pixel
        # ratio
        canvas = document.createElement("canvas")
        context = canvas.getContext("2d")
        self._ratio = self.get_dpi_ratio(context)

        width, height = self.get_width_height()
        width *= self._ratio
        height *= self._ratio
        div = self._create_root_element()
        add_event_listener(div, "contextmenu", ignore)
        div.setAttribute(
            "style",
            "margin: 0 auto; text-align: center;" + f"width: {width / self._ratio}px",
        )
        div.id = self._id

        # The top bar
        top = document.createElement("div")
        top.id = self._id + "top"
        top.setAttribute("style", "font-weight: bold; text-align: center")
        top.textContent = self._title
        div.appendChild(top)

        # A div containing two canvases stacked on top of one another:
        #   - The bottom for rendering matplotlib content
        #   - The top for rendering interactive elements, such as the zoom
        #     rubberband
        canvas_div = document.createElement("div")
        canvas_div.setAttribute("style", "position: relative")

        canvas.id = self._id + "canvas"
        canvas.setAttribute("width", width)
        canvas.setAttribute("height", height)
        canvas.setAttribute(
            "style",
            "left: 0; top: 0; z-index: 0; outline: 0;"
            + "width: {}px; height: {}px".format(
                width / self._ratio, height / self._ratio
            ),
        )
        canvas_div.appendChild(canvas)

        rubberband = document.createElement("canvas")
        rubberband.id = self._id + "rubberband"
        rubberband.setAttribute("width", width)
        rubberband.setAttribute("height", height)
        rubberband.setAttribute(
            "style",
            "position: absolute; left: 0; top: 0; z-index: 0; "
            + "outline: 0; width: {}px; height: {}px".format(
                width / self._ratio, height / self._ratio
            ),
        )
        # Canvas must have a "tabindex" attr in order to receive keyboard
        # events
        rubberband.setAttribute("tabindex", "0")
        # Event handlers are added to the canvas "on top", even though most of
        # the activity happens in the canvas below.
        add_event_listener(rubberband, "mousemove", self.onmousemove)
        add_event_listener(rubberband, "mouseup", self.onmouseup)
        add_event_listener(rubberband, "mousedown", self.onmousedown)
        add_event_listener(rubberband, "mouseenter", self.onmouseenter)
        add_event_listener(rubberband, "mouseleave", self.onmouseleave)
        add_event_listener(rubberband, "keyup", self.onkeyup)
        add_event_listener(rubberband, "keydown", self.onkeydown)
        context = rubberband.getContext("2d")
        context.strokeStyle = "#000000"
        context.setLineDash([2, 2])
        canvas_div.appendChild(rubberband)

        div.appendChild(canvas_div)

        # The bottom bar, with toolbar and message display
        bottom = document.createElement("div")
        toolbar = self.toolbar.get_element()
        bottom.appendChild(toolbar)
        message = document.createElement("div")
        message.id = self._id + "message"
        message.setAttribute("style", "min-height: 1.5em")
        bottom.appendChild(message)
        div.appendChild(bottom)

        self.draw()

    def draw(self):
        pass

    def draw_idle(self):
        if not self._idle_scheduled:
            self._idle_scheduled = True
            set_timeout(self.draw, 1)

    def set_message(self, message):
        message_display = self.get_element("message")
        if message_display is not None:
            message_display.textContent = message

    def _convert_mouse_event(self, event):
        width, height = self.get_width_height()
        x = event.offsetX
        y = height - event.offsetY
        button = event.button + 1
        # Disable the right-click context menu in some browsers
        if button == 3:
            event.preventDefault()
            event.stopPropagation()
        if button == 2:
            button = 3
        return x, y, button

    def onmousemove(self, event):
        x, y, button = self._convert_mouse_event(event)
        self.motion_notify_event(x, y, guiEvent=event)

    def onmouseup(self, event):
        x, y, button = self._convert_mouse_event(event)
        self.button_release_event(x, y, button, guiEvent=event)

    def onmousedown(self, event):
        x, y, button = self._convert_mouse_event(event)
        self.button_press_event(x, y, button, guiEvent=event)

    def onmouseenter(self, event):
        # When the mouse is over the figure, get keyboard focus
        self.get_element("rubberband").focus()
        self.enter_notify_event(guiEvent=event)

    def onmouseleave(self, event):
        # When the mouse leaves the figure, drop keyboard focus
        self.get_element("rubberband").blur()
        self.leave_notify_event(guiEvent=event)

    def onscroll(self, event):
        x, y, button = self._convert_mouse_event(event)
        self.scroll_event(x, y, event.deltaX, guiEvent=event)

    _cursor_map = {0: "pointer", 1: "default", 2: "crosshair", 3: "move"}

    def set_cursor(self, cursor):
        rubberband = self.get_element("rubberband")
        if rubberband is not None:
            rubberband.style.cursor = self._cursor_map.get(cursor, 0)

    # http://www.cambiaresearch.com/articles/15/javascript-char-codes-key-codes
    _SHIFT_LUT = {
        59: ":",
        61: "+",
        173: "_",
        186: ":",
        187: "+",
        188: "<",
        189: "_",
        190: ">",
        191: "?",
        192: "~",
        219: "{",
        220: "|",
        221: "}",
        222: '"',
    }

    _LUT = {
        8: "backspace",
        9: "tab",
        13: "enter",
        16: "shift",
        17: "control",
        18: "alt",
        19: "pause",
        20: "caps",
        27: "escape",
        32: " ",
        33: "pageup",
        34: "pagedown",
        35: "end",
        36: "home",
        37: "left",
        38: "up",
        39: "right",
        40: "down",
        45: "insert",
        46: "delete",
        91: "super",
        92: "super",
        93: "select",
        106: "*",
        107: "+",
        109: "-",
        110: ".",
        111: "/",
        144: "num_lock",
        145: "scroll_lock",
        186: ":",
        187: "=",
        188: ",",
        189: "-",
        190: ".",
        191: "/",
        192: "`",
        219: "[",
        220: "\\",
        221: "]",
        222: "'",
    }

    def _create_root_element(self):
        div = document.createElement("div")
        mpl_target = getattr(document, "pyodideMplTarget", document.body)
        mpl_target.appendChild(div)
        return div

    def _convert_key_event(self, event):
        code = int(event.which)
        value = chr(code)
        shift = event.shiftKey and code != 16
        ctrl = event.ctrlKey and code != 17
        alt = event.altKey and code != 18

        # letter keys
        if 65 <= code <= 90:
            if not shift:
                value = value.lower()
            else:
                shift = False
        # number keys
        elif 48 <= code <= 57:
            if shift:
                value = ")!@#$%^&*("[int(value)]
                shift = False
        # function keys
        elif 112 <= code <= 123:
            value = "f%s" % (code - 111)
        # number pad keys
        elif 96 <= code <= 105:
            value = "%s" % (code - 96)
        # keys with shift alternatives
        elif code in self._SHIFT_LUT and shift:
            value = self._SHIFT_LUT[code]
            shift = False
        elif code in self._LUT:
            value = self._LUT[code]

        key = []
        if shift:
            key.append("shift")
        if ctrl:
            key.append("ctrl")
        if alt:
            key.append("alt")
        key.append(value)
        return "+".join(key)

    def onkeydown(self, event):
        key = self._convert_key_event(event)
        self.key_press_event(key, guiEvent=event)

    def onkeyup(self, event):
        key = self._convert_key_event(event)
        self.key_release_event(key, guiEvent=event)

    def get_window_title(self):
        top = self.get_element("top")
        return top.textContent

    def set_window_title(self, title):
        top = self.get_element("top")
        self._title = title
        if top is not None:
            top.textContent = title

    # def resize_event(self):
    #     # TODO
    #     pass

    # def close_event(self):
    #     # TODO
    #     pass

    def draw_rubberband(self, x0, y0, x1, y1):
        rubberband = self.get_element("rubberband")
        width, height = self.get_width_height()
        y0 = height - y0
        y1 = height - y1
        x0 = math.floor(x0) + 0.5
        y0 = math.floor(y0) + 0.5
        x1 = math.floor(x1) + 0.5
        y1 = math.floor(y1) + 0.5
        if x1 < x0:
            x0, x1 = x1, x0
        if y1 < y0:
            y0, y1 = y1, y0
        context = rubberband.getContext("2d")
        context.clearRect(0, 0, width * self._ratio, height * self._ratio)
        context.strokeRect(
            x0 * self._ratio,
            y0 * self._ratio,
            (x1 - x0) * self._ratio,
            (y1 - y0) * self._ratio,
        )

    def remove_rubberband(self):
        rubberband = self.get_element("rubberband")
        width, height = self.get_width_height()
        context = rubberband.getContext("2d")
        context.clearRect(0, 0, width * self._ratio, height * self._ratio)

    def new_timer(self, *args, **kwargs):
        return TimerWasm(*args, **kwargs)


_FONTAWESOME_ICONS = {
    "home": "fa-home",
    "back": "fa-arrow-left",
    "forward": "fa-arrow-right",
    "zoom_to_rect": "fa-search-plus",
    "move": "fa-arrows",
    "download": "fa-download",
    None: None,
}


FILE_TYPES = {"png": "image/png", "svg": "image/svg+xml", "pdf": "application/pdf"}


class NavigationToolbar2Wasm(NavigationToolbar2):
    def _init_toolbar(self):
        pass

    def get_element(self):
        # Create the HTML content for the toolbar
        div = document.createElement("span")

        def add_spacer():
            span = document.createElement("span")
            span.style.minWidth = "16px"
            span.textContent = "\u00a0"
            div.appendChild(span)

        for _text, _tooltip_text, image_file, name_of_method in self.toolitems:
            if image_file in _FONTAWESOME_ICONS:
                if image_file is None:
                    add_spacer()
                else:
                    button = document.createElement("button")
                    button.classList.add("fa")
                    button.classList.add(_FONTAWESOME_ICONS[image_file])
                    button.classList.add("matplotlib-toolbar-button")
                    add_event_listener(button, "click", getattr(self, name_of_method))
                    div.appendChild(button)

        for format, _mimetype in sorted(list(FILE_TYPES.items())):
            button = document.createElement("button")
            button.classList.add("fa")
            button.textContent = format
            button.classList.add("matplotlib-toolbar-button")
            button.id = "text"
            add_event_listener(button, "click", self.ondownload)
            div.appendChild(button)

        return div

    def ondownload(self, event):
        format = event.target.textContent
        self.download(format, FILE_TYPES[format])

    def download(self, format, mimetype):
        pass

    def set_message(self, message):
        self.canvas.set_message(message)

    def set_cursor(self, cursor):
        self.canvas.set_cursor(cursor)

    def draw_rubberband(self, event, x0, y0, x1, y1):
        self.canvas.draw_rubberband(x0, y0, x1, y1)

    def remove_rubberband(self):
        self.canvas.remove_rubberband()


class TimerWasm(TimerBase):
    def _timer_start(self):
        self._timer_stop()
        if self._single:
            self._timer: int | None = set_timeout(self._on_timer, self.interval)
        else:
            self._timer = set_interval(self._on_timer, self.interval)

    def _timer_stop(self):
        if self._timer is None:
            return
        elif self._single:
            clear_timeout(self._timer)
            self._timer = None
        else:
            clear_interval(self._timer)
            self._timer = None

    def _timer_set_interval(self):
        # Only stop and restart it if the timer has already been started
        if self._timer is not None:
            self._timer_stop()
            self._timer_start()
PK2RnX<6E>d<EFBFBD><64><EFBFBD>;<00>;*matplotlib_pyodide/html5_canvas_backend.pyimport base64
import io
import math

import numpy as np
from matplotlib import __version__, interactive
from matplotlib.backend_bases import (
    FigureManagerBase,
    GraphicsContextBase,
    RendererBase,
    _Backend,
)
from matplotlib.cbook import maxdict
from matplotlib.colors import colorConverter, rgb2hex
from matplotlib.font_manager import findfont
from matplotlib.ft2font import LOAD_NO_HINTING, FT2Font
from matplotlib.mathtext import MathTextParser
from matplotlib.path import Path
from matplotlib.transforms import Affine2D
from PIL import Image
from PIL.PngImagePlugin import PngInfo

from matplotlib_pyodide.browser_backend import FigureCanvasWasm, NavigationToolbar2Wasm

try:
    from js import FontFace, ImageData, document
except ImportError as err:
    raise ImportError(
        "html5_canvas_backend is only supported in the browser in the main thread"
    ) from err
from pyodide.ffi import create_proxy

_capstyle_d = {"projecting": "square", "butt": "butt", "round": "round"}

# The URLs of fonts that have already been loaded into the browser
_font_set = set()

_base_fonts_url = "/fonts/"

interactive(True)


class FigureCanvasHTMLCanvas(FigureCanvasWasm):
    def __init__(self, *args, **kwargs):
        FigureCanvasWasm.__init__(self, *args, **kwargs)

    def draw(self):
        # Render the figure using custom renderer
        self._idle_scheduled = True
        orig_dpi = self.figure.dpi
        if self._ratio != 1:
            self.figure.dpi *= self._ratio
        try:
            width, height = self.get_width_height()
            canvas = self.get_element("canvas")
            if canvas is None:
                return
            ctx = canvas.getContext("2d")
            renderer = RendererHTMLCanvas(ctx, width, height, self.figure.dpi, self)
            self.figure.draw(renderer)
        except Exception as e:
            raise RuntimeError("Rendering failed") from e
        finally:
            self.figure.dpi = orig_dpi
            self._idle_scheduled = False

    def get_pixel_data(self):
        """
        Directly getting the underlying pixel data (using `getImageData()`)
        results in a different (but similar) image than the reference image.
        The method below takes a longer route
        (pixels --> encode PNG --> decode PNG --> pixels)
        but gives us the exact pixel data that the reference image has allowing
        us to do a fair comparison test.
        """
        canvas = self.get_element("canvas")
        img_URL = canvas.toDataURL("image/png")[21:]
        canvas_base64 = base64.b64decode(img_URL)
        return np.asarray(Image.open(io.BytesIO(canvas_base64)))

    def print_png(
        self, filename_or_obj, *args, metadata=None, pil_kwargs=None, **kwargs
    ):
        if metadata is None:
            metadata = {}
        if pil_kwargs is None:
            pil_kwargs = {}
        metadata = {
            "Software": f"matplotlib version{__version__}, http://matplotlib.org/",
            **metadata,
        }

        if "pnginfo" not in pil_kwargs:
            pnginfo = PngInfo()
            for k, v in metadata.items():
                pnginfo.add_text(k, v)
            pil_kwargs["pnginfo"] = pnginfo
        pil_kwargs.setdefault("dpi", (self.figure.dpi, self.figure.dpi))

        data = self.get_pixel_data()

        (Image.fromarray(data).save(filename_or_obj, format="png", **pil_kwargs))


class NavigationToolbar2HTMLCanvas(NavigationToolbar2Wasm):
    def download(self, format, mimetype):
        """
        Creates a temporary `a` element with a URL containing the image
        content, and then virtually clicks it. Kind of magical, but it
        works...
        """
        element = document.createElement("a")
        data = io.BytesIO()

        if format == "png":
            FigureCanvasHTMLCanvas.print_png(self.canvas, data)
        else:
            try:
                self.canvas.figure.savefig(data, format=format)
            except Exception:
                raise

        element.setAttribute(
            "href",
            "data:{};base64,{}".format(
                mimetype, base64.b64encode(data.getvalue()).decode("ascii")
            ),
        )
        element.setAttribute("download", f"plot.{format}")
        element.style.display = "none"

        document.body.appendChild(element)
        element.click()
        document.body.removeChild(element)


class GraphicsContextHTMLCanvas(GraphicsContextBase):
    def __init__(self, renderer):
        super().__init__()
        self.stroke = True
        self.renderer = renderer

    def restore(self):
        self.renderer.ctx.restore()

    def set_capstyle(self, cs):
        if cs in ["butt", "round", "projecting"]:
            self._capstyle = cs
            self.renderer.ctx.lineCap = _capstyle_d[cs]
        else:
            raise ValueError(f"Unrecognized cap style. Found {cs}")

    def set_clip_rectangle(self, rectangle):
        self.renderer.ctx.save()
        if not rectangle:
            self.renderer.ctx.restore()
            return
        x, y, w, h = np.round(rectangle.bounds)
        self.renderer.ctx.beginPath()
        self.renderer.ctx.rect(x, self.renderer.height - y - h, w, h)
        self.renderer.ctx.clip()

    def set_clip_path(self, path):
        self.renderer.ctx.save()
        if not path:
            self.renderer.ctx.restore()
            return
        tpath, affine = path.get_transformed_path_and_affine()
        affine = affine + Affine2D().scale(1, -1).translate(0, self.renderer.height)
        self.renderer._path_helper(self.renderer.ctx, tpath, affine)
        self.renderer.ctx.clip()

    def set_dashes(self, dash_offset, dash_list):
        self._dashes = dash_offset, dash_list
        if dash_offset is not None:
            self.renderer.ctx.lineDashOffset = dash_offset
        if dash_list is None:
            self.renderer.ctx.setLineDash([])
        else:
            dln = np.asarray(dash_list)
            dl = list(self.renderer.points_to_pixels(dln))
            self.renderer.ctx.setLineDash(dl)

    def set_joinstyle(self, js):
        if js in ["miter", "round", "bevel"]:
            self._joinstyle = js
            self.renderer.ctx.lineJoin = js
        else:
            raise ValueError(f"Unrecognized join style. Found {js}")

    def set_linewidth(self, w):
        self.stroke = w != 0
        self._linewidth = float(w)
        self.renderer.ctx.lineWidth = self.renderer.points_to_pixels(float(w))


class RendererHTMLCanvas(RendererBase):
    def __init__(self, ctx, width, height, dpi, fig):
        super().__init__()
        self.fig = fig
        self.ctx = ctx
        self.width = width
        self.height = height
        self.ctx.width = self.width
        self.ctx.height = self.height
        self.dpi = dpi
        self.fontd = maxdict(50)
        self.mathtext_parser = MathTextParser("bitmap")

        # Keep the state of fontfaces that are loading
        self.fonts_loading = {}

    def new_gc(self):
        return GraphicsContextHTMLCanvas(renderer=self)

    def points_to_pixels(self, points):
        return (points / 72.0) * self.dpi

    def _matplotlib_color_to_CSS(self, color, alpha, alpha_overrides, is_RGB=True):
        if not is_RGB:
            R, G, B, alpha = colorConverter.to_rgba(color)
            color = (R, G, B)

        if (len(color) == 4) and (alpha is None):
            alpha = color[3]

        if alpha is None:
            CSS_color = rgb2hex(color[:3])

        else:
            R = int(color[0] * 255)
            G = int(color[1] * 255)
            B = int(color[2] * 255)
            if len(color) == 3 or alpha_overrides:
                CSS_color = f"""rgba({R:d}, {G:d}, {B:d}, {alpha:.3g})"""
            else:
                CSS_color = """rgba({:d}, {:d}, {:d}, {:.3g})""".format(
                    R, G, B, color[3]
                )

        return CSS_color

    def _set_style(self, gc, rgbFace=None):
        if rgbFace is not None:
            self.ctx.fillStyle = self._matplotlib_color_to_CSS(
                rgbFace, gc.get_alpha(), gc.get_forced_alpha()
            )

        if gc.get_capstyle():
            self.ctx.lineCap = _capstyle_d[gc.get_capstyle()]

        self.ctx.strokeStyle = self._matplotlib_color_to_CSS(
            gc.get_rgb(), gc.get_alpha(), gc.get_forced_alpha()
        )

        self.ctx.lineWidth = self.points_to_pixels(gc.get_linewidth())

    def _path_helper(self, ctx, path, transform, clip=None):
        ctx.beginPath()
        for points, code in path.iter_segments(transform, remove_nans=True, clip=clip):
            if code == Path.MOVETO:
                ctx.moveTo(points[0], points[1])
            elif code == Path.LINETO:
                ctx.lineTo(points[0], points[1])
            elif code == Path.CURVE3:
                ctx.quadraticCurveTo(*points)
            elif code == Path.CURVE4:
                ctx.bezierCurveTo(*points)
            elif code == Path.CLOSEPOLY:
                ctx.closePath()

    def draw_path(self, gc, path, transform, rgbFace=None):
        self._set_style(gc, rgbFace)
        if rgbFace is None and gc.get_hatch() is None:
            figure_clip = (0, 0, self.width, self.height)

        else:
            figure_clip = None

        transform += Affine2D().scale(1, -1).translate(0, self.height)
        self._path_helper(self.ctx, path, transform, figure_clip)

        if rgbFace is not None:
            self.ctx.fill()
            self.ctx.fillStyle = "#000000"

        if gc.stroke:
            self.ctx.stroke()

    def draw_markers(self, gc, marker_path, marker_trans, path, trans, rgbFace=None):
        super().draw_markers(gc, marker_path, marker_trans, path, trans, rgbFace)

    def draw_image(self, gc, x, y, im, transform=None):
        im = np.flipud(im)
        h, w, d = im.shape
        y = self.ctx.height - y - h
        im = np.ravel(np.uint8(np.reshape(im, (h * w * d, -1)))).tobytes()
        pixels_proxy = create_proxy(im)
        pixels_buf = pixels_proxy.getBuffer("u8clamped")
        img_data = ImageData.new(pixels_buf.data, w, h)
        self.ctx.save()
        in_memory_canvas = document.createElement("canvas")
        in_memory_canvas.width = w
        in_memory_canvas.height = h
        in_memory_canvas_context = in_memory_canvas.getContext("2d")
        in_memory_canvas_context.putImageData(img_data, 0, 0)
        self.ctx.drawImage(in_memory_canvas, x, y, w, h)
        self.ctx.restore()
        pixels_proxy.destroy()
        pixels_buf.release()

    def _get_font(self, prop):
        key = hash(prop)
        font_value = self.fontd.get(key)
        if font_value is None:
            fname = findfont(prop)
            font_value = self.fontd.get(fname)
            if font_value is None:
                font = FT2Font(str(fname))
                font_file_name = fname[fname.rfind("/") + 1 :]
                font_value = font, font_file_name
                self.fontd[fname] = font_value
            self.fontd[key] = font_value
        font, font_file_name = font_value
        font.clear()
        font.set_size(prop.get_size_in_points(), self.dpi)
        return font, font_file_name

    def get_text_width_height_descent(self, s, prop, ismath):
        w: float
        h: float
        if ismath:
            image, d = self.mathtext_parser.parse(s, self.dpi, prop)
            image_arr = np.asarray(image)
            h, w = image_arr.shape
        else:
            font, _ = self._get_font(prop)
            font.set_text(s, 0.0, flags=LOAD_NO_HINTING)
            w, h = font.get_width_height()
            w /= 64.0
            h /= 64.0
            d = font.get_descent() / 64.0
        return w, h, d

    def _draw_math_text(self, gc, x, y, s, prop, angle):
        rgba, descent = self.mathtext_parser.to_rgba(
            s, gc.get_rgb(), self.dpi, prop.get_size_in_points()
        )
        height, width, _ = rgba.shape
        angle = math.radians(angle)
        if angle != 0:
            self.ctx.save()
            self.ctx.translate(x, y)
            self.ctx.rotate(-angle)
            self.ctx.translate(-x, -y)
        self.draw_image(gc, x, -y - descent, np.flipud(rgba))
        if angle != 0:
            self.ctx.restore()

    def load_font_into_web(self, loaded_face, font_url):
        fontface = loaded_face.result()
        document.fonts.add(fontface)
        self.fonts_loading.pop(font_url, None)

        # Redraw figure after font has loaded
        self.fig.draw()
        return fontface

    def draw_text(self, gc, x, y, s, prop, angle, ismath=False, mtext=None):
        if ismath:
            self._draw_math_text(gc, x, y, s, prop, angle)
            return

        angle = math.radians(angle)
        width, height, descent = self.get_text_width_height_descent(s, prop, ismath)
        x -= math.sin(angle) * descent
        y -= math.cos(angle) * descent - self.ctx.height
        font_size = self.points_to_pixels(prop.get_size_in_points())

        _, font_file_name = self._get_font(prop)

        font_face_arguments = (
            prop.get_name(),
            f"url({_base_fonts_url + font_file_name})",
        )

        # The following snippet loads a font into the browser's
        # environment if it wasn't loaded before. This check is necessary
        # to help us avoid loading the same font multiple times. Further,
        # it helps us to avoid the infinite loop of
        # load font --> redraw --> load font --> redraw --> ....

        if font_face_arguments not in _font_set:
            _font_set.add(font_face_arguments)
            f = FontFace.new(*font_face_arguments)

            font_url = font_face_arguments[1]
            self.fonts_loading[font_url] = f
            f.load().add_done_callback(
                lambda result: self.load_font_into_web(result, font_url)
            )

        font_property_string = "{} {} {:.3g}px {}, {}".format(
            prop.get_style(),
            prop.get_weight(),
            font_size,
            prop.get_name(),
            prop.get_family()[0],
        )
        if angle != 0:
            self.ctx.save()
            self.ctx.translate(x, y)
            self.ctx.rotate(-angle)
            self.ctx.translate(-x, -y)
        self.ctx.font = font_property_string
        self.ctx.fillStyle = self._matplotlib_color_to_CSS(
            gc.get_rgb(), gc.get_alpha(), gc.get_forced_alpha()
        )
        self.ctx.fillText(s, x, y)
        self.ctx.fillStyle = "#000000"
        if angle != 0:
            self.ctx.restore()


class FigureManagerHTMLCanvas(FigureManagerBase):
    def __init__(self, canvas, num):
        super().__init__(canvas, num)
        self.set_window_title("Figure %d" % num)
        self.toolbar = NavigationToolbar2HTMLCanvas(canvas)

    def show(self, *args, **kwargs):
        self.canvas.show(*args, **kwargs)

    def resize(self, w, h):
        pass

    def set_window_title(self, title):
        self.canvas.set_window_title(title)


@_Backend.export
class _BackendHTMLCanvas(_Backend):
    FigureCanvas = FigureCanvasHTMLCanvas
    FigureManager = FigureManagerHTMLCanvas

    @staticmethod
    def show(*args, **kwargs):
        from matplotlib import pyplot as plt

        plt.gcf().canvas.show(*args, **kwargs)
PK2RnX<06>3L<33><00>"matplotlib_pyodide/wasm_backend.py"""
A matplotlib backend that renders to an HTML5 canvas in the same thread.

The Agg backend is used for the actual rendering underneath, and renders the
buffer to the HTML5 canvas. This happens with only a single copy of the data
into the Canvas -- passing the data from Python to JavaScript requires no
copies.

See matplotlib.backend_bases for documentation for most of the methods, since
this primarily is just overriding methods in the base class.
"""

# TODO: Figure resizing support

import base64
import io

from js import ImageData, document
from matplotlib import interactive
from matplotlib.backend_bases import FigureManagerBase, _Backend
from matplotlib.backends import backend_agg

from matplotlib_pyodide.browser_backend import FigureCanvasWasm, NavigationToolbar2Wasm

interactive(True)


class FigureCanvasAggWasm(backend_agg.FigureCanvasAgg, FigureCanvasWasm):
    def __init__(self, *args, **kwargs):
        backend_agg.FigureCanvasAgg.__init__(self, *args, **kwargs)
        FigureCanvasWasm.__init__(self, *args, **kwargs)

    def draw(self):
        from pyodide.ffi import create_proxy

        # Render the figure using Agg
        self._idle_scheduled = True
        orig_dpi = self.figure.dpi
        if self._ratio != 1:
            self.figure.dpi *= self._ratio
        pixels_proxy = None
        pixels_buf = None
        try:
            super().draw()
            # Copy the image buffer to the canvas
            width, height = self.get_width_height()
            canvas = self.get_element("canvas")
            if canvas is None:
                return
            pixels = self.buffer_rgba().tobytes()
            pixels_proxy = create_proxy(pixels)
            pixels_buf = pixels_proxy.getBuffer("u8clamped")
            image_data = ImageData.new(pixels_buf.data, width, height)
            ctx = canvas.getContext("2d")
            ctx.putImageData(image_data, 0, 0)
        finally:
            self.figure.dpi = orig_dpi
            self._idle_scheduled = False
            if pixels_proxy:
                pixels_proxy.destroy()
            if pixels_buf:
                pixels_buf.release()


class NavigationToolbar2AggWasm(NavigationToolbar2Wasm):
    def download(self, format, mimetype):
        # Creates a temporary `a` element with a URL containing the image
        # content, and then virtually clicks it. Kind of magical, but it
        # works...
        element = document.createElement("a")
        data = io.BytesIO()
        try:
            self.canvas.figure.savefig(data, format=format)
        except Exception:
            raise
        element.setAttribute(
            "href",
            "data:{};base64,{}".format(
                mimetype, base64.b64encode(data.getvalue()).decode("ascii")
            ),
        )
        element.setAttribute("download", f"plot.{format}")
        element.style.display = "none"
        document.body.appendChild(element)
        element.click()
        document.body.removeChild(element)


class FigureManagerAggWasm(FigureManagerBase):
    def __init__(self, canvas, num):
        FigureManagerBase.__init__(self, canvas, num)
        self.set_window_title("Figure %d" % num)
        self.toolbar = NavigationToolbar2AggWasm(canvas)

    def show(self, *args, **kwargs):
        self.canvas.show(*args, **kwargs)

    def resize(self, w, h):
        pass

    def set_window_title(self, title):
        self.canvas.set_window_title(title)


@_Backend.export
class _BackendWasmCoreAgg(_Backend):
    FigureCanvas = FigureCanvasAggWasm
    FigureManager = FigureManagerAggWasm

    @staticmethod
    def show(*args, **kwargs):
        from matplotlib import pyplot as plt

        plt.gcf().canvas.show(*args, **kwargs)
PK2RnX<6E>i0UAUA*matplotlib_pyodide-0.2.1.dist-info/LICENSEMozilla Public License Version 2.0
==================================

1. Definitions
--------------

1.1. "Contributor"
    means each individual or legal entity that creates, contributes to
    the creation of, or owns Covered Software.

1.2. "Contributor Version"
    means the combination of the Contributions of others (if any) used
    by a Contributor and that particular Contributor's Contribution.

1.3. "Contribution"
    means Covered Software of a particular Contributor.

1.4. "Covered Software"
    means Source Code Form to which the initial Contributor has attached
    the notice in Exhibit A, the Executable Form of such Source Code
    Form, and Modifications of such Source Code Form, in each case
    including portions thereof.

1.5. "Incompatible With Secondary Licenses"
    means

    (a) that the initial Contributor has attached the notice described
        in Exhibit B to the Covered Software; or

    (b) that the Covered Software was made available under the terms of
        version 1.1 or earlier of the License, but not also under the
        terms of a Secondary License.

1.6. "Executable Form"
    means any form of the work other than Source Code Form.

1.7. "Larger Work"
    means a work that combines Covered Software with other material, in
    a separate file or files, that is not Covered Software.

1.8. "License"
    means this document.

1.9. "Licensable"
    means having the right to grant, to the maximum extent possible,
    whether at the time of the initial grant or subsequently, any and
    all of the rights conveyed by this License.

1.10. "Modifications"
    means any of the following:

    (a) any file in Source Code Form that results from an addition to,
        deletion from, or modification of the contents of Covered
        Software; or

    (b) any new file in Source Code Form that contains any Covered
        Software.

1.11. "Patent Claims" of a Contributor
    means any patent claim(s), including without limitation, method,
    process, and apparatus claims, in any patent Licensable by such
    Contributor that would be infringed, but for the grant of the
    License, by the making, using, selling, offering for sale, having
    made, import, or transfer of either its Contributions or its
    Contributor Version.

1.12. "Secondary License"
    means either the GNU General Public License, Version 2.0, the GNU
    Lesser General Public License, Version 2.1, the GNU Affero General
    Public License, Version 3.0, or any later versions of those
    licenses.

1.13. "Source Code Form"
    means the form of the work preferred for making modifications.

1.14. "You" (or "Your")
    means an individual or a legal entity exercising rights under this
    License. For legal entities, "You" includes any entity that
    controls, is controlled by, or is under common control with You. For
    purposes of this definition, "control" means (a) the power, direct
    or indirect, to cause the direction or management of such entity,
    whether by contract or otherwise, or (b) ownership of more than
    fifty percent (50%) of the outstanding shares or beneficial
    ownership of such entity.

2. License Grants and Conditions
--------------------------------

2.1. Grants

Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:

(a) under intellectual property rights (other than patent or trademark)
    Licensable by such Contributor to use, reproduce, make available,
    modify, display, perform, distribute, and otherwise exploit its
    Contributions, either on an unmodified basis, with Modifications, or
    as part of a Larger Work; and

(b) under Patent Claims of such Contributor to make, use, sell, offer
    for sale, have made, import, and otherwise transfer either its
    Contributions or its Contributor Version.

2.2. Effective Date

The licenses granted in Section 2.1 with respect to any Contribution
become effective for each Contribution on the date the Contributor first
distributes such Contribution.

2.3. Limitations on Grant Scope

The licenses granted in this Section 2 are the only rights granted under
this License. No additional rights or licenses will be implied from the
distribution or licensing of Covered Software under this License.
Notwithstanding Section 2.1(b) above, no patent license is granted by a
Contributor:

(a) for any code that a Contributor has removed from Covered Software;
    or

(b) for infringements caused by: (i) Your and any other third party's
    modifications of Covered Software, or (ii) the combination of its
    Contributions with other software (except as part of its Contributor
    Version); or

(c) under Patent Claims infringed by Covered Software in the absence of
    its Contributions.

This License does not grant any rights in the trademarks, service marks,
or logos of any Contributor (except as may be necessary to comply with
the notice requirements in Section 3.4).

2.4. Subsequent Licenses

No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this
License (see Section 10.2) or under the terms of a Secondary License (if
permitted under the terms of Section 3.3).

2.5. Representation

Each Contributor represents that the Contributor believes its
Contributions are its original creation(s) or it has sufficient rights
to grant the rights to its Contributions conveyed by this License.

2.6. Fair Use

This License is not intended to limit any rights You have under
applicable copyright doctrines of fair use, fair dealing, or other
equivalents.

2.7. Conditions

Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
in Section 2.1.

3. Responsibilities
-------------------

3.1. Distribution of Source Form

All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under
the terms of this License. You must inform recipients that the Source
Code Form of the Covered Software is governed by the terms of this
License, and how they can obtain a copy of this License. You may not
attempt to alter or restrict the recipients' rights in the Source Code
Form.

3.2. Distribution of Executable Form

If You distribute Covered Software in Executable Form then:

(a) such Covered Software must also be made available in Source Code
    Form, as described in Section 3.1, and You must inform recipients of
    the Executable Form how they can obtain a copy of such Source Code
    Form by reasonable means in a timely manner, at a charge no more
    than the cost of distribution to the recipient; and

(b) You may distribute such Executable Form under the terms of this
    License, or sublicense it under different terms, provided that the
    license for the Executable Form does not attempt to limit or alter
    the recipients' rights in the Source Code Form under this License.

3.3. Distribution of a Larger Work

You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for
the Covered Software. If the Larger Work is a combination of Covered
Software with a work governed by one or more Secondary Licenses, and the
Covered Software is not Incompatible With Secondary Licenses, this
License permits You to additionally distribute such Covered Software
under the terms of such Secondary License(s), so that the recipient of
the Larger Work may, at their option, further distribute the Covered
Software under the terms of either this License or such Secondary
License(s).

3.4. Notices

You may not remove or alter the substance of any license notices
(including copyright notices, patent notices, disclaimers of warranty,
or limitations of liability) contained within the Source Code Form of
the Covered Software, except that You may alter any license notices to
the extent required to remedy known factual inaccuracies.

3.5. Application of Additional Terms

You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on
behalf of any Contributor. You must make it absolutely clear that any
such warranty, support, indemnity, or liability obligation is offered by
You alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.

4. Inability to Comply Due to Statute or Regulation
---------------------------------------------------

If it is impossible for You to comply with any of the terms of this
License with respect to some or all of the Covered Software due to
statute, judicial order, or regulation then You must: (a) comply with
the terms of this License to the maximum extent possible; and (b)
describe the limitations and the code they affect. Such description must
be placed in a text file included with all distributions of the Covered
Software under this License. Except to the extent prohibited by statute
or regulation, such description must be sufficiently detailed for a
recipient of ordinary skill to be able to understand it.

5. Termination
--------------

5.1. The rights granted under this License will terminate automatically
if You fail to comply with any of its terms. However, if You become
compliant, then the rights granted under this License from a particular
Contributor are reinstated (a) provisionally, unless and until such
Contributor explicitly and finally terminates Your grants, and (b) on an
ongoing basis, if such Contributor fails to notify You of the
non-compliance by some reasonable means prior to 60 days after You have
come back into compliance. Moreover, Your grants from a particular
Contributor are reinstated on an ongoing basis if such Contributor
notifies You of the non-compliance by some reasonable means, this is the
first time You have received notice of non-compliance with this License
from such Contributor, and You become compliant prior to 30 days after
Your receipt of the notice.

5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions,
counter-claims, and cross-claims) alleging that a Contributor Version
directly or indirectly infringes any patent, then the rights granted to
You by any and all Contributors for the Covered Software under Section
2.1 of this License shall terminate.

5.3. In the event of termination under Sections 5.1 or 5.2 above, all
end user license agreements (excluding distributors and resellers) which
have been validly granted by You or Your distributors under this License
prior to termination shall survive termination.

************************************************************************
*                                                                      *
*  6. Disclaimer of Warranty                                           *
*  -------------------------                                           *
*                                                                      *
*  Covered Software is provided under this License on an "as is"       *
*  basis, without warranty of any kind, either expressed, implied, or  *
*  statutory, including, without limitation, warranties that the       *
*  Covered Software is free of defects, merchantable, fit for a        *
*  particular purpose or non-infringing. The entire risk as to the     *
*  quality and performance of the Covered Software is with You.        *
*  Should any Covered Software prove defective in any respect, You     *
*  (not any Contributor) assume the cost of any necessary servicing,   *
*  repair, or correction. This disclaimer of warranty constitutes an   *
*  essential part of this License. No use of any Covered Software is   *
*  authorized under this License except under this disclaimer.         *
*                                                                      *
************************************************************************

************************************************************************
*                                                                      *
*  7. Limitation of Liability                                          *
*  --------------------------                                          *
*                                                                      *
*  Under no circumstances and under no legal theory, whether tort      *
*  (including negligence), contract, or otherwise, shall any           *
*  Contributor, or anyone who distributes Covered Software as          *
*  permitted above, be liable to You for any direct, indirect,         *
*  special, incidental, or consequential damages of any character      *
*  including, without limitation, damages for lost profits, loss of    *
*  goodwill, work stoppage, computer failure or malfunction, or any    *
*  and all other commercial damages or losses, even if such party      *
*  shall have been informed of the possibility of such damages. This   *
*  limitation of liability shall not apply to liability for death or   *
*  personal injury resulting from such party's negligence to the       *
*  extent applicable law prohibits such limitation. Some               *
*  jurisdictions do not allow the exclusion or limitation of           *
*  incidental or consequential damages, so this exclusion and          *
*  limitation may not apply to You.                                    *
*                                                                      *
************************************************************************

8. Litigation
-------------

Any litigation relating to this License may be brought only in the
courts of a jurisdiction where the defendant maintains its principal
place of business and such litigation shall be governed by laws of that
jurisdiction, without reference to its conflict-of-law provisions.
Nothing in this Section shall prevent a party's ability to bring
cross-claims or counter-claims.

9. Miscellaneous
----------------

This License represents the complete agreement concerning the subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. Any law or regulation which provides
that the language of a contract shall be construed against the drafter
shall not be used to construe this License against a Contributor.

10. Versions of the License
---------------------------

10.1. New Versions

Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.

10.2. Effect of New Versions

You may distribute the Covered Software under the terms of the version
of the License under which You originally received the Covered Software,
or under the terms of any subsequent version published by the license
steward.

10.3. Modified Versions

If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a
modified version of this License if you rename the license and remove
any references to the name of the license steward (except to note that
such modified license differs from this License).

10.4. Distributing Source Code Form that is Incompatible With Secondary
Licenses

If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.

Exhibit A - Source Code Form License Notice
-------------------------------------------

  This Source Code Form is subject to the terms of the Mozilla Public
  License, v. 2.0. If a copy of the MPL was not distributed with this
  file, You can obtain one at http://mozilla.org/MPL/2.0/.

If it is not possible or desirable to put the notice in a particular
file, then You may include the notice in a location (such as a LICENSE
file in a relevant directory) where a recipient would be likely to look
for such a notice.

You may add additional accurate notices of copyright ownership.

Exhibit B - "Incompatible With Secondary Licenses" Notice
---------------------------------------------------------

  This Source Code Form is "Incompatible With Secondary Licenses", as
  defined by the Mozilla Public License, v. 2.0.
PK2RnX<6E>V<EFBFBD>8<EFBFBD>V<00>V+matplotlib_pyodide-0.2.1.dist-info/METADATAMetadata-Version: 2.1
Name: matplotlib-pyodide
Version: 0.2.1
Summary: HTML5 backends for Matplotlib compatible with Pyodide
Author: Pyodide developers
License: Mozilla Public License Version 2.0
        ==================================
        
        1. Definitions
        --------------
        
        1.1. "Contributor"
            means each individual or legal entity that creates, contributes to
            the creation of, or owns Covered Software.
        
        1.2. "Contributor Version"
            means the combination of the Contributions of others (if any) used
            by a Contributor and that particular Contributor's Contribution.
        
        1.3. "Contribution"
            means Covered Software of a particular Contributor.
        
        1.4. "Covered Software"
            means Source Code Form to which the initial Contributor has attached
            the notice in Exhibit A, the Executable Form of such Source Code
            Form, and Modifications of such Source Code Form, in each case
            including portions thereof.
        
        1.5. "Incompatible With Secondary Licenses"
            means
        
            (a) that the initial Contributor has attached the notice described
                in Exhibit B to the Covered Software; or
        
            (b) that the Covered Software was made available under the terms of
                version 1.1 or earlier of the License, but not also under the
                terms of a Secondary License.
        
        1.6. "Executable Form"
            means any form of the work other than Source Code Form.
        
        1.7. "Larger Work"
            means a work that combines Covered Software with other material, in
            a separate file or files, that is not Covered Software.
        
        1.8. "License"
            means this document.
        
        1.9. "Licensable"
            means having the right to grant, to the maximum extent possible,
            whether at the time of the initial grant or subsequently, any and
            all of the rights conveyed by this License.
        
        1.10. "Modifications"
            means any of the following:
        
            (a) any file in Source Code Form that results from an addition to,
                deletion from, or modification of the contents of Covered
                Software; or
        
            (b) any new file in Source Code Form that contains any Covered
                Software.
        
        1.11. "Patent Claims" of a Contributor
            means any patent claim(s), including without limitation, method,
            process, and apparatus claims, in any patent Licensable by such
            Contributor that would be infringed, but for the grant of the
            License, by the making, using, selling, offering for sale, having
            made, import, or transfer of either its Contributions or its
            Contributor Version.
        
        1.12. "Secondary License"
            means either the GNU General Public License, Version 2.0, the GNU
            Lesser General Public License, Version 2.1, the GNU Affero General
            Public License, Version 3.0, or any later versions of those
            licenses.
        
        1.13. "Source Code Form"
            means the form of the work preferred for making modifications.
        
        1.14. "You" (or "Your")
            means an individual or a legal entity exercising rights under this
            License. For legal entities, "You" includes any entity that
            controls, is controlled by, or is under common control with You. For
            purposes of this definition, "control" means (a) the power, direct
            or indirect, to cause the direction or management of such entity,
            whether by contract or otherwise, or (b) ownership of more than
            fifty percent (50%) of the outstanding shares or beneficial
            ownership of such entity.
        
        2. License Grants and Conditions
        --------------------------------
        
        2.1. Grants
        
        Each Contributor hereby grants You a world-wide, royalty-free,
        non-exclusive license:
        
        (a) under intellectual property rights (other than patent or trademark)
            Licensable by such Contributor to use, reproduce, make available,
            modify, display, perform, distribute, and otherwise exploit its
            Contributions, either on an unmodified basis, with Modifications, or
            as part of a Larger Work; and
        
        (b) under Patent Claims of such Contributor to make, use, sell, offer
            for sale, have made, import, and otherwise transfer either its
            Contributions or its Contributor Version.
        
        2.2. Effective Date
        
        The licenses granted in Section 2.1 with respect to any Contribution
        become effective for each Contribution on the date the Contributor first
        distributes such Contribution.
        
        2.3. Limitations on Grant Scope
        
        The licenses granted in this Section 2 are the only rights granted under
        this License. No additional rights or licenses will be implied from the
        distribution or licensing of Covered Software under this License.
        Notwithstanding Section 2.1(b) above, no patent license is granted by a
        Contributor:
        
        (a) for any code that a Contributor has removed from Covered Software;
            or
        
        (b) for infringements caused by: (i) Your and any other third party's
            modifications of Covered Software, or (ii) the combination of its
            Contributions with other software (except as part of its Contributor
            Version); or
        
        (c) under Patent Claims infringed by Covered Software in the absence of
            its Contributions.
        
        This License does not grant any rights in the trademarks, service marks,
        or logos of any Contributor (except as may be necessary to comply with
        the notice requirements in Section 3.4).
        
        2.4. Subsequent Licenses
        
        No Contributor makes additional grants as a result of Your choice to
        distribute the Covered Software under a subsequent version of this
        License (see Section 10.2) or under the terms of a Secondary License (if
        permitted under the terms of Section 3.3).
        
        2.5. Representation
        
        Each Contributor represents that the Contributor believes its
        Contributions are its original creation(s) or it has sufficient rights
        to grant the rights to its Contributions conveyed by this License.
        
        2.6. Fair Use
        
        This License is not intended to limit any rights You have under
        applicable copyright doctrines of fair use, fair dealing, or other
        equivalents.
        
        2.7. Conditions
        
        Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
        in Section 2.1.
        
        3. Responsibilities
        -------------------
        
        3.1. Distribution of Source Form
        
        All distribution of Covered Software in Source Code Form, including any
        Modifications that You create or to which You contribute, must be under
        the terms of this License. You must inform recipients that the Source
        Code Form of the Covered Software is governed by the terms of this
        License, and how they can obtain a copy of this License. You may not
        attempt to alter or restrict the recipients' rights in the Source Code
        Form.
        
        3.2. Distribution of Executable Form
        
        If You distribute Covered Software in Executable Form then:
        
        (a) such Covered Software must also be made available in Source Code
            Form, as described in Section 3.1, and You must inform recipients of
            the Executable Form how they can obtain a copy of such Source Code
            Form by reasonable means in a timely manner, at a charge no more
            than the cost of distribution to the recipient; and
        
        (b) You may distribute such Executable Form under the terms of this
            License, or sublicense it under different terms, provided that the
            license for the Executable Form does not attempt to limit or alter
            the recipients' rights in the Source Code Form under this License.
        
        3.3. Distribution of a Larger Work
        
        You may create and distribute a Larger Work under terms of Your choice,
        provided that You also comply with the requirements of this License for
        the Covered Software. If the Larger Work is a combination of Covered
        Software with a work governed by one or more Secondary Licenses, and the
        Covered Software is not Incompatible With Secondary Licenses, this
        License permits You to additionally distribute such Covered Software
        under the terms of such Secondary License(s), so that the recipient of
        the Larger Work may, at their option, further distribute the Covered
        Software under the terms of either this License or such Secondary
        License(s).
        
        3.4. Notices
        
        You may not remove or alter the substance of any license notices
        (including copyright notices, patent notices, disclaimers of warranty,
        or limitations of liability) contained within the Source Code Form of
        the Covered Software, except that You may alter any license notices to
        the extent required to remedy known factual inaccuracies.
        
        3.5. Application of Additional Terms
        
        You may choose to offer, and to charge a fee for, warranty, support,
        indemnity or liability obligations to one or more recipients of Covered
        Software. However, You may do so only on Your own behalf, and not on
        behalf of any Contributor. You must make it absolutely clear that any
        such warranty, support, indemnity, or liability obligation is offered by
        You alone, and You hereby agree to indemnify every Contributor for any
        liability incurred by such Contributor as a result of warranty, support,
        indemnity or liability terms You offer. You may include additional
        disclaimers of warranty and limitations of liability specific to any
        jurisdiction.
        
        4. Inability to Comply Due to Statute or Regulation
        ---------------------------------------------------
        
        If it is impossible for You to comply with any of the terms of this
        License with respect to some or all of the Covered Software due to
        statute, judicial order, or regulation then You must: (a) comply with
        the terms of this License to the maximum extent possible; and (b)
        describe the limitations and the code they affect. Such description must
        be placed in a text file included with all distributions of the Covered
        Software under this License. Except to the extent prohibited by statute
        or regulation, such description must be sufficiently detailed for a
        recipient of ordinary skill to be able to understand it.
        
        5. Termination
        --------------
        
        5.1. The rights granted under this License will terminate automatically
        if You fail to comply with any of its terms. However, if You become
        compliant, then the rights granted under this License from a particular
        Contributor are reinstated (a) provisionally, unless and until such
        Contributor explicitly and finally terminates Your grants, and (b) on an
        ongoing basis, if such Contributor fails to notify You of the
        non-compliance by some reasonable means prior to 60 days after You have
        come back into compliance. Moreover, Your grants from a particular
        Contributor are reinstated on an ongoing basis if such Contributor
        notifies You of the non-compliance by some reasonable means, this is the
        first time You have received notice of non-compliance with this License
        from such Contributor, and You become compliant prior to 30 days after
        Your receipt of the notice.
        
        5.2. If You initiate litigation against any entity by asserting a patent
        infringement claim (excluding declaratory judgment actions,
        counter-claims, and cross-claims) alleging that a Contributor Version
        directly or indirectly infringes any patent, then the rights granted to
        You by any and all Contributors for the Covered Software under Section
        2.1 of this License shall terminate.
        
        5.3. In the event of termination under Sections 5.1 or 5.2 above, all
        end user license agreements (excluding distributors and resellers) which
        have been validly granted by You or Your distributors under this License
        prior to termination shall survive termination.
        
        ************************************************************************
        *                                                                      *
        *  6. Disclaimer of Warranty                                           *
        *  -------------------------                                           *
        *                                                                      *
        *  Covered Software is provided under this License on an "as is"       *
        *  basis, without warranty of any kind, either expressed, implied, or  *
        *  statutory, including, without limitation, warranties that the       *
        *  Covered Software is free of defects, merchantable, fit for a        *
        *  particular purpose or non-infringing. The entire risk as to the     *
        *  quality and performance of the Covered Software is with You.        *
        *  Should any Covered Software prove defective in any respect, You     *
        *  (not any Contributor) assume the cost of any necessary servicing,   *
        *  repair, or correction. This disclaimer of warranty constitutes an   *
        *  essential part of this License. No use of any Covered Software is   *
        *  authorized under this License except under this disclaimer.         *
        *                                                                      *
        ************************************************************************
        
        ************************************************************************
        *                                                                      *
        *  7. Limitation of Liability                                          *
        *  --------------------------                                          *
        *                                                                      *
        *  Under no circumstances and under no legal theory, whether tort      *
        *  (including negligence), contract, or otherwise, shall any           *
        *  Contributor, or anyone who distributes Covered Software as          *
        *  permitted above, be liable to You for any direct, indirect,         *
        *  special, incidental, or consequential damages of any character      *
        *  including, without limitation, damages for lost profits, loss of    *
        *  goodwill, work stoppage, computer failure or malfunction, or any    *
        *  and all other commercial damages or losses, even if such party      *
        *  shall have been informed of the possibility of such damages. This   *
        *  limitation of liability shall not apply to liability for death or   *
        *  personal injury resulting from such party's negligence to the       *
        *  extent applicable law prohibits such limitation. Some               *
        *  jurisdictions do not allow the exclusion or limitation of           *
        *  incidental or consequential damages, so this exclusion and          *
        *  limitation may not apply to You.                                    *
        *                                                                      *
        ************************************************************************
        
        8. Litigation
        -------------
        
        Any litigation relating to this License may be brought only in the
        courts of a jurisdiction where the defendant maintains its principal
        place of business and such litigation shall be governed by laws of that
        jurisdiction, without reference to its conflict-of-law provisions.
        Nothing in this Section shall prevent a party's ability to bring
        cross-claims or counter-claims.
        
        9. Miscellaneous
        ----------------
        
        This License represents the complete agreement concerning the subject
        matter hereof. If any provision of this License is held to be
        unenforceable, such provision shall be reformed only to the extent
        necessary to make it enforceable. Any law or regulation which provides
        that the language of a contract shall be construed against the drafter
        shall not be used to construe this License against a Contributor.
        
        10. Versions of the License
        ---------------------------
        
        10.1. New Versions
        
        Mozilla Foundation is the license steward. Except as provided in Section
        10.3, no one other than the license steward has the right to modify or
        publish new versions of this License. Each version will be given a
        distinguishing version number.
        
        10.2. Effect of New Versions
        
        You may distribute the Covered Software under the terms of the version
        of the License under which You originally received the Covered Software,
        or under the terms of any subsequent version published by the license
        steward.
        
        10.3. Modified Versions
        
        If you create software not governed by this License, and you want to
        create a new license for such software, you may create and use a
        modified version of this License if you rename the license and remove
        any references to the name of the license steward (except to note that
        such modified license differs from this License).
        
        10.4. Distributing Source Code Form that is Incompatible With Secondary
        Licenses
        
        If You choose to distribute Source Code Form that is Incompatible With
        Secondary Licenses under the terms of this version of the License, the
        notice described in Exhibit B of this License must be attached.
        
        Exhibit A - Source Code Form License Notice
        -------------------------------------------
        
          This Source Code Form is subject to the terms of the Mozilla Public
          License, v. 2.0. If a copy of the MPL was not distributed with this
          file, You can obtain one at http://mozilla.org/MPL/2.0/.
        
        If it is not possible or desirable to put the notice in a particular
        file, then You may include the notice in a location (such as a LICENSE
        file in a relevant directory) where a recipient would be likely to look
        for such a notice.
        
        You may add additional accurate notices of copyright ownership.
        
        Exhibit B - "Incompatible With Secondary Licenses" Notice
        ---------------------------------------------------------
        
          This Source Code Form is "Incompatible With Secondary Licenses", as
          defined by the Mozilla Public License, v. 2.0.
        
Project-URL: Homepage, https://github.com/pyodide/matplotlib-pyodide
Project-URL: Bug Tracker, https://github.com/pyodide/matplotlib-pyodide/issues
Classifier: Programming Language :: Python :: 3
Classifier: License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)
Classifier: Operating System :: OS Independent
Requires-Python: >=3.10
Description-Content-Type: text/markdown
License-File: LICENSE
Provides-Extra: test
Requires-Dist: pytest-pyodide ==0.52.2 ; extra == 'test'
Requires-Dist: pytest-cov ; extra == 'test'
Requires-Dist: build ==0.10 ; extra == 'test'

# matplotlib-pyodide

[![PyPI Latest Release](https://img.shields.io/pypi/v/matplotlib-pyodide.svg)](https://pypi.org/project/matplotlib-pyodide/)
![GHA](https://github.com/pyodide/matplotlib-pyodide/actions/workflows/main.yml/badge.svg)
[![codecov](https://codecov.io/gh/pyodide/matplotlib-pyodide/branch/main/graph/badge.svg)](https://codecov.io/gh/pyodide/matplotlib-pyodide)


HTML5 backends for Matplotlib compatible with Pyodide

This package includes two matplotlib backends,

 - the `wasm_backend` which from allows rendering the Agg buffer as static images into an HTML canvas
 - an interactive HTML5 canvas backend `html5_canvas_backend` described in
   [this blog post](https://blog.pyodide.org/posts/canvas-renderer-matplotlib-in-pyodide/)


## Installation

This package will be installed as a dependency when you load `matplotlib` in Pyodide.

## Usage

To change the backend in matplotlib,
 - for the wasm backend,
   ```py
   import matplotlib
   matplotlib.use("module://matplotlib_pyodide.wasm_backend")
   ```
 - for the interactive HTML5 backend;
   ```py
   import matplotlib
   matplotlib.use("module://matplotlib_pyodide.html5_canvas_backend")
   ```

By default, matplotlib figures will be rendered inside a div that's appended to the end of `document.body`.
You can override this behavior by setting `document.pyodideMplTarget` to an HTML element. If you had an HTML
element with id "target", you could configure the backend to render visualizations inside it with this code:

```py
document.pyodideMplTarget = document.getElementById('target')
```

For more information see the [matplotlib documentation](https://matplotlib.org/stable/users/explain/backends.html).

## License

pyodide-cli uses the [Mozilla Public License Version
2.0](https://choosealicense.com/licenses/mpl-2.0/).
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