Python matplotlib._png.PNG_FILTER_NONE Examples

The following are 6 code examples of matplotlib._png.PNG_FILTER_NONE(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module matplotlib._png , or try the search function .
Example #1
Source File: backend_webagg_core.py    From Mastering-Elasticsearch-7.0 with MIT License 5 votes vote down vote up 
def get_diff_image(self):
        if self._png_is_old:
            renderer = self.get_renderer()

            # The buffer is created as type uint32 so that entire
            # pixels can be compared in one numpy call, rather than
            # needing to compare each plane separately.
            buff = (np.frombuffer(renderer.buffer_rgba(), dtype=np.uint32)
                    .reshape((renderer.height, renderer.width)))

            # If any pixels have transparency, we need to force a full
            # draw as we cannot overlay new on top of old.
            pixels = buff.view(dtype=np.uint8).reshape(buff.shape + (4,))

            if self._force_full or np.any(pixels[:, :, 3] != 255):
                self.set_image_mode('full')
                output = buff
            else:
                self.set_image_mode('diff')
                last_buffer = (np.frombuffer(self._last_renderer.buffer_rgba(),
                                             dtype=np.uint32)
                               .reshape((renderer.height, renderer.width)))
                diff = buff != last_buffer
                output = np.where(diff, buff, 0)

            # TODO: We should write a new version of write_png that
            # handles the differencing inline
            buff = _png.write_png(
                output.view(dtype=np.uint8).reshape(output.shape + (4,)),
                None, compression=6, filter=_png.PNG_FILTER_NONE)

            # Swap the renderer frames
            self._renderer, self._last_renderer = (
                self._last_renderer, renderer)
            self._force_full = False
            self._png_is_old = False
            return buff
Example #2
Source File: backend_webagg_core.py    From GraphicDesignPatternByPython with MIT License 5 votes vote down vote up 
def get_diff_image(self):
        if self._png_is_old:
            renderer = self.get_renderer()

            # The buffer is created as type uint32 so that entire
            # pixels can be compared in one numpy call, rather than
            # needing to compare each plane separately.
            buff = (np.frombuffer(renderer.buffer_rgba(), dtype=np.uint32)
                    .reshape((renderer.height, renderer.width)))

            # If any pixels have transparency, we need to force a full
            # draw as we cannot overlay new on top of old.
            pixels = buff.view(dtype=np.uint8).reshape(buff.shape + (4,))

            if self._force_full or np.any(pixels[:, :, 3] != 255):
                self.set_image_mode('full')
                output = buff
            else:
                self.set_image_mode('diff')
                last_buffer = (np.frombuffer(self._last_renderer.buffer_rgba(),
                                             dtype=np.uint32)
                               .reshape((renderer.height, renderer.width)))
                diff = buff != last_buffer
                output = np.where(diff, buff, 0)

            # TODO: We should write a new version of write_png that
            # handles the differencing inline
            buff = _png.write_png(
                output.view(dtype=np.uint8).reshape(output.shape + (4,)),
                None, compression=6, filter=_png.PNG_FILTER_NONE)

            # Swap the renderer frames
            self._renderer, self._last_renderer = (
                self._last_renderer, renderer)
            self._force_full = False
            self._png_is_old = False
            return buff
Example #3
Source File: backend_webagg_core.py    From python3_ios with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def get_diff_image(self):
        if self._png_is_old:
            renderer = self.get_renderer()

            # The buffer is created as type uint32 so that entire
            # pixels can be compared in one numpy call, rather than
            # needing to compare each plane separately.
            buff = (np.frombuffer(renderer.buffer_rgba(), dtype=np.uint32)
                    .reshape((renderer.height, renderer.width)))

            # If any pixels have transparency, we need to force a full
            # draw as we cannot overlay new on top of old.
            pixels = buff.view(dtype=np.uint8).reshape(buff.shape + (4,))

            if self._force_full or np.any(pixels[:, :, 3] != 255):
                self.set_image_mode('full')
                output = buff
            else:
                self.set_image_mode('diff')
                last_buffer = (np.frombuffer(self._last_renderer.buffer_rgba(),
                                             dtype=np.uint32)
                               .reshape((renderer.height, renderer.width)))
                diff = buff != last_buffer
                output = np.where(diff, buff, 0)

            # TODO: We should write a new version of write_png that
            # handles the differencing inline
            buff = _png.write_png(
                output.view(dtype=np.uint8).reshape(output.shape + (4,)),
                None, compression=6, filter=_png.PNG_FILTER_NONE)

            # Swap the renderer frames
            self._renderer, self._last_renderer = (
                self._last_renderer, renderer)
            self._force_full = False
            self._png_is_old = False
            return buff
Example #4
Source File: backend_webagg_core.py    From coffeegrindsize with MIT License 5 votes vote down vote up 
def get_diff_image(self):
        if self._png_is_old:
            renderer = self.get_renderer()

            # The buffer is created as type uint32 so that entire
            # pixels can be compared in one numpy call, rather than
            # needing to compare each plane separately.
            buff = (np.frombuffer(renderer.buffer_rgba(), dtype=np.uint32)
                    .reshape((renderer.height, renderer.width)))

            # If any pixels have transparency, we need to force a full
            # draw as we cannot overlay new on top of old.
            pixels = buff.view(dtype=np.uint8).reshape(buff.shape + (4,))

            if self._force_full or np.any(pixels[:, :, 3] != 255):
                self.set_image_mode('full')
                output = buff
            else:
                self.set_image_mode('diff')
                last_buffer = (np.frombuffer(self._last_renderer.buffer_rgba(),
                                             dtype=np.uint32)
                               .reshape((renderer.height, renderer.width)))
                diff = buff != last_buffer
                output = np.where(diff, buff, 0)

            # TODO: We should write a new version of write_png that
            # handles the differencing inline
            buff = _png.write_png(
                output.view(dtype=np.uint8).reshape(output.shape + (4,)),
                None, compression=6, filter=_png.PNG_FILTER_NONE)

            # Swap the renderer frames
            self._renderer, self._last_renderer = (
                self._last_renderer, renderer)
            self._force_full = False
            self._png_is_old = False
            return buff
Example #5
Source File: backend_webagg_core.py    From CogAlg with MIT License 5 votes vote down vote up 
def get_diff_image(self):
        if self._png_is_old:
            renderer = self.get_renderer()

            # The buffer is created as type uint32 so that entire
            # pixels can be compared in one numpy call, rather than
            # needing to compare each plane separately.
            buff = (np.frombuffer(renderer.buffer_rgba(), dtype=np.uint32)
                    .reshape((renderer.height, renderer.width)))

            # If any pixels have transparency, we need to force a full
            # draw as we cannot overlay new on top of old.
            pixels = buff.view(dtype=np.uint8).reshape(buff.shape + (4,))

            if self._force_full or np.any(pixels[:, :, 3] != 255):
                self.set_image_mode('full')
                output = buff
            else:
                self.set_image_mode('diff')
                last_buffer = (np.frombuffer(self._last_renderer.buffer_rgba(),
                                             dtype=np.uint32)
                               .reshape((renderer.height, renderer.width)))
                diff = buff != last_buffer
                output = np.where(diff, buff, 0)

            # TODO: We should write a new version of write_png that
            # handles the differencing inline
            buff = _png.write_png(
                output.view(dtype=np.uint8).reshape(output.shape + (4,)),
                None, compression=6, filter=_png.PNG_FILTER_NONE)

            # Swap the renderer frames
            self._renderer, self._last_renderer = (
                self._last_renderer, renderer)
            self._force_full = False
            self._png_is_old = False
            return buff
Example #6
Source File: backend_webagg_core.py    From twitter-stock-recommendation with MIT License 5 votes vote down vote up 
def get_diff_image(self):
        if self._png_is_old:
            renderer = self.get_renderer()

            # The buffer is created as type uint32 so that entire
            # pixels can be compared in one numpy call, rather than
            # needing to compare each plane separately.
            buff = (np.frombuffer(renderer.buffer_rgba(), dtype=np.uint32)
                    .reshape((renderer.height, renderer.width)))

            # If any pixels have transparency, we need to force a full
            # draw as we cannot overlay new on top of old.
            pixels = buff.view(dtype=np.uint8).reshape(buff.shape + (4,))

            if self._force_full or np.any(pixels[:, :, 3] != 255):
                self.set_image_mode('full')
                output = buff
            else:
                self.set_image_mode('diff')
                last_buffer = (np.frombuffer(self._last_renderer.buffer_rgba(),
                                             dtype=np.uint32)
                               .reshape((renderer.height, renderer.width)))
                diff = buff != last_buffer
                output = np.where(diff, buff, 0)

            # TODO: We should write a new version of write_png that
            # handles the differencing inline
            buff = _png.write_png(
                output.view(dtype=np.uint8).reshape(output.shape + (4,)),
                None, compression=6, filter=_png.PNG_FILTER_NONE)

            # Swap the renderer frames
            self._renderer, self._last_renderer = (
                self._last_renderer, renderer)
            self._force_full = False
            self._png_is_old = False
            return buff