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 QUL_PLATFORM_DEFAULT_BINARY_ASSET_OPTIONS to enable configuring how the asset data binaries are included in the application binary.
• Compiler, graphics driver, and SDK upgrades:
  • ARM GCC compiler v10.3.
  • IAR compiler 9.20.4.
  • Graphics Driver v1e.1.0 for Traveo II Cluster Series
  • MCUXPresso SDK v2.11.1
• Added support for the RK055HDMIPI4MA0 display on NXP RT1170.
• Added the QUL_RH850_FLASH_TYPE and QUL_RH850_RAM_TYPE configure options to enable using Octa flash and Octa RAM for resource data.
• Added support to build the tviic2d6m-baremetal platform using the IAR 8.22 Functional Safety compiler.
• Added the Text.wrapMode API.
• Added error notification API to enable applications handle Qt Quick Ultralite errors gracefully. Refer to Error handling for more information.
• Added the qul_generate_flash_target CMake command to generate flash target.
• Added the texture() and textureCount() functions to access texture data.
• Added the performance and footprint guide to enable using Qt for MCUs optimally.
• Added Monotype FontmapEditor support for the Linux host, and upgraded it to the latest version.

Fixed issues

Qt for MCUs v2.2.2

• Fixed CMake logic to ignore the JDK found in the system environment while trying to find JLink.
• Fixed build type check for the multi-config generators such as MSVC to ensure that the default build type is correct.
• Fixed rendering artifacts on Cypress Traveo II with the shapes example built using the IAR toolchain.
• Fixed performance logging issues with a custom exec loop.
• Fixed issues related to flashing binaries onto the STM devices.

Qt for MCUs v2.2.1

• Fixed the logic used for auto-generation of static text translation arrays, to ensure that they are always stored in flash.
• Fixed the platform port for Infineon Traveo II to avoid the rounded rectangle blending artifacts with OTF windows.
• Fixed slower animation loops on the STM platform.
• Updated PauseAnimation and TimeLineAnimation to be based on the timestamp to avoid running them longer than expected.
• Fixed performance issues that was caused by frequent calls to the DrawingEngine::blendPath() function.
• Fixed the qmlcompiler to improve the error messages related to the invalid QML filename.
• Fixed following issues in the Desktop simulator:
  • Render quality when system scaling is enabled.
  • Default build type for applications on Windows is set to Release.

Qt for MCUs v2.2.0

• Optimized bindings to reduce code size by around 3-15% depending on the toolchain and the application.
• Fixed text layout to not include leading (font metric) in line height. This improves compatibility between Qt Quick and Qt Quick Ultralite.
• Fixed layers ignoring visible property and ensure that the property is also propagated to the layer's children.
• Fixed packaging to ensure that the compatibility sources are included.
• Optimized qulrcc to ensure that the raw binary data is aligned properly.
• Optimized the Screen and ItemLayer types to warn about wrong usage.
• Fixed inconsistent behavior in qulrcc when a qul_add_resource has BASE and PREFIX defined.
• Updated NXT RT1170 platform port to use a series of bezier curves instead of an arc.
• Fixed the font data array address alignment issue.
• Updated Qt Quick Ultralite to be compatible with Qt 6.2.4.
• Fixed memory manager to skip aligning memory in case of a nullptr.
• Fixed the Chess example to handle the turn indicator's location based on the screen orientation.
• Fixed rendering issues on Traveo II with Green Hills toolchain.
• Refactored blending logic to avoid flickering on STM32H750B.

New APIs

APIs for application development

• New Member Functions
• New Functions in Namespaces
• New Global Functions
• New QML Properties

New Member Functions

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New Functions in Namespaces

New Global Functions

New QML Properties

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APIs for platform development

• New Global Functions
• New Macros

New Global Functions

New Macros

Changes in Previous Versions