Can textures be unloaded?

[s-m-e]

My Improvement

I was digging through the documentation but I could not find a clear statement: Can textures be unloaded? I.e. can I free their memory and remove them from a texture registry? If yes, how?

I am considering to use DearPyGui for an app that would dynamically load and visualize a large quantity of images, likely exceeding available memory, so a clean way of managing memory is highly desired.

Necessary Assets

None.

[hoffstadt]

You just need to "delete_item(...)". This will remove them from the texture registry. Once the last item using the texture is deleted, it will unload the texture completely.

[nrupatunga]

@hoffstadt Is this the way to free the texture memory

class ImageDraw:
    def __init__(self,
                 width: int = 2000,
                 height: int = 1000,
                 border: bool = False,
                 no_scrollbar: bool = True):

        assert (width > 0), 'width>0 for ImageDraw'
        assert (height > 0), 'height>0 for ImageDraw'
        self.imgdraw_tag: int = dpg.generate_uuid()
        gap: int = 15
        self.img_w: int = width - gap
        self.img_h: int = height - gap
        with dpg.window(width=width,
                        height=height,
                        tag=self.imgdraw_tag,
                        no_scrollbar=no_scrollbar):
            dpg.add_button(label='delete', callback=self.__del__)
            self.texture_tag = dpg.generate_uuid()
            self.texture_registry_tag = dpg.generate_uuid()
            with dpg.texture_registry(show=False,
                                      tag=self.texture_registry_tag):
                dpg.add_raw_texture(width=self.img_w,
                                    height=self.img_h,
                                    default_value=np.zeros(
                                        self.img_w*self.img_h*3),
                                    format=dpg.mvFormat_Float_rgb,
                                    tag=self.texture_tag)
            dpg.add_image(self.texture_tag)

    def __del__(self):
        print('clear image')
        dpg.delete_item(self.texture_tag)
        print('texture deleted')


if __name__ == "__main__":
    dpg.create_context()
    dpg.create_viewport(title='example')
    dpg.set_viewport_min_width(800)
    dpg.set_viewport_min_height(600)
    img_frame = ImageDraw()
    dpg.setup_dearpygui()
    dpg.show_viewport()
    try:
        dpg.start_dearpygui()
    except Exception:
        print(format_exc())
    finally:
        dpg.destroy_context()