Qt Quick Ultralite maintains source compatibility between minor releases. However, some changes may require you to adapt the application code accordingly. The following sections highlight such changes:

New features

• Added support for Run Length Encoding (RLE) pixel formats, enabling another compression method for PNG. They can be enabled by setting the QUL_RESOURCE_IMAGE_PIXEL_FORMAT source file property to either XRGB8888RLE or ARGB8888RLE for opaque and non-opaque images respectively.
• Updated the Qul::Application class with an additional constructor that accepts an ApplicationConfiguration instance to configure text cache.
• Added support for RLE-compressed image layers on Renesas RH850.
• Added the AutomaticCompressedLossless pixel format option to QUL_RESOURCE_IMAGE_PIXEL_FORMAT, together with the QUL_PLATFORM_DEFAULT_RESOURCE_COMPRESSED_LOSSLESS_PIXEL_FORMAT_ALPHA and QUL_PLATFORM_DEFAULT_RESOURCE_COMPRESSED_LOSSLESS_PIXEL_FORMAT_OPAQUE CMake variables. It enables the resource compiler to automatically choose the pixel format for lossless compression based on the platform defaults.
• Added the freertos_app_switch example, demonstrating how to switch between a Qt Quick Ultralite application and another one using soft Reset.
• Optimized binding template instantiations, reducing the code size considerably. The code size reduction could be 3%-15%, depending on on the tool chain and application.
• Dropped leading (font metric) in the text layout for Text and StaticText items, ensuring that the text layout is compatible with Qt Quick.
• Add documentation for framebuffers.
• Added support for eliding single and multi-line texts.
• Added the freertos_app_switch example to demonstrate how to switch between a Qt Quick Ultralite and non-Qt Quick Ultralite application.

Fixed issues

Qt for MCUs v2.1.0

• Fixed unexpected behavior on the NXP boards due to unsupported color depth. Added checks to ensure that the given color depth is supported on the board.
• Fixed property aliases to ensure that they can be used with the scale and rotation properties too.
• Removed check for paths above the project root from the qul_add_resource implementation. It is now possible to include a resource that lives outside the project tree with the BASE path.
• Fixed 1px offset issue in a StaticText item when used with the static font engine.
• Fixed rendering issues on RT1170 while filling a vector image.
• Removed the logic to center the window from the RH850 platform port, as this is handled by Qt Quick Ultralite Core. The layer example centers the window by default.
• Updated documentation to include correct NXP SDK path.
• Fixed the template for Slider to ensure that the handle is centered on the Slider.
• Fixed STM platform ports for FreeRTOS to ensure that they initialize suspension properly.
• Fixed flickering ImageLayer artifacts on RH850 due to memory bandwidth limitations. This can be avoided by placing resources in the VRAM. See Loading resources to VRAM for more information.
• Fixed issues related to hardware performance logging on FreeRTOS.
• Excluded the multiscreen example from the prebuilt examples for RH850.
• Fixed the interrupt_handler example halting on NXP RT1050 with FreeRTOS.
• Fixed SwipeView animation halting on tapping the screen during the animation.

Qt for MCUs v2.1.1

• Ensured that the item layer's contents are rendered only if the layer is enabled.
• Fixed incorrect type selection of glyph offset by the fontcompiler.
• Fixed issues related to flashing the thermo demo by enabling resource compression on RT1064.
• Fixed issues related to Qt Online Installer content for the Qt for Device Creation Enterprise and Professional licenses. For more information, see Licensing Model.
• Fixed linking issues related to the MonotypeSpark and MonotypeSparkAligned libraries.
• Fixed display artifacts on NXP 1170 while running the swipe game demo.

New APIs

APIs for application development

• New Classes
• New Member Functions
• New QML Properties

New Classes

New Member Functions

Class ApplicationConfiguration:

New QML Properties

QML Type Text:

APIs for platform development

• New Global Functions
• New Enum Types

New Global Functions

New Enum Types

Changes in Previous Versions