Images

Overview

An <images> section can be added to globals.xml files.

Later, it might also be supported in components and widgets to define local images and keep the global space cleaner.

This <images> section describes how to map images with names.

Only <file> is currently supported, and <convert> is not yet implemented.

Usage

<images>
        <file name="avatar" src_path="avatar1.png">
                <convert path="raw/avatar.svg" width="100px" color_format="L8"/>
        </file>

        <data name="logo" src_path="logo1.png" color-format="rgb565" memory="RAM2">
                <convert path="https://foo.com/image.png" width="50%" height="80%"
                color_format="RGB565"/>
        </data>
</images>

• <file> means that the image source is used as a file path:

• <data> means that the image is converted to a C array on export.

In both cases in the exported C code global const void * <image_name> variables are created and in the initialization function of the component library (e.g. my_lib_init_gen()) either the path or the pointer to the converted lv_image_dsc_t pointers are assigned to that variable.

In lv_image_set_src(image, image_name) is used instead of the path or lv_image_dsc_t pointer directly.

For simplicity, in the UI Editor preview, images are always loaded as files.

If the UI is created from XML at runtime and a globals.xml is parsed, the <data> tags are skipped because it is assumed that the user manually creates the mapping. This is because the XML parser cannot automatically map an image like:

lv_image_dsc_t my_logo;

to

<data name="my_logo"/>

Constants

Constants can be used with images as well.

<consts>
        <int name="icon_size" value="32">
                <variant name="size" case="small" value="16"/>
        </int>
</consts>

<images>
        <data name="icon_apply" src_path="apply.png">
                <convert path="raw/apply.png" width="#icon_size"/>
        </data>
</images>