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:

Important changes

• Deprecated the following functions:
  • Qul::PlatformInterface::DrawingDevice::pixelAt()
  • Qul::PlatformInterface::Texture::dataAtOffset()
  • Qul::PlatformInterface::DrawingDevice::bytesPerPixel()
  • Qul::PlatformInterface::Texture::bytesPerPixel()
  • Qul::Image::bytesPerPixel()

New features

• Added protobuf support using the nanopb 3rd party library to enable better communication between the host and the target.
• Added the 3rd party printf implementation for embedded systems.
• Added Qt Creator support for the QtQuickUltralite.Extras module by adding the plugin.qmltypes file.
• Added the QUL_MONOTYPE_SPARK_HEAP_NO_PREALLOC and QUL_MONOTYPE_SPARK_HEAP_SIZE CMake target properties to configure the heap/cache buffers for Monotype Spark.
• Added support for property bindings on the Qt.font() API.
• Added the memory allocation API to have control over the size of memory allocations.
• Added the PaintedItem and Qul::PaintedItemDelegate APIs to support rendering QML items using custom hardware-accelerated or software renderer.
• Added the Screen::defaultApplicationSize API, enabling the platform to override the application window size if its root item does not have a size.
• Upgraded to ARM GCC version 9.
• Added support for the Qul::PixelFormat_Alpha1 pixel format.
• Added the PixelDataPointer structure to handle pointing pixel data where bitsPerPixel() is < 8. This structure is used with the Qul::PlatformInterface::DrawingDevice::pixelDataAt() and Qul::PlatformInterface::Texture::pixelData().
• Enabled Text and StaticText items to handle the missing glpyhs more gracefully. They render a placeholder glyph (box) for the missing glpyh.
• Added the QUL_DEFAULT_FONT_QUALITY CMake target property and font.quality QML API to control the glyph rendering quality.

  Note: You must set the font.unicodeCoverage property if the automatic glyph generation is disabled.

• Added painteditem example, camera example, and Swipe game demo.
• Added support for the Infineon/Cypress Traveo II board.
• Added support for Linux development host.
• Upgraded the CMake minimun version to v3.17.3.
• Added the MessageQueue API to enable implementing custom queues.

Fixed issues

• Refactored text alignment calculation to fix horizontal alignment issues on a Text item.
• Fixed the heap size for the charts example to support the screen size on MIMXRT1170.
• Upgraded NXP board SDK to version 2.9.1.
• Fixed the Thermo demo animation issues on RA6M3G by disabling the fade animation.
• Fixed blending of PixelFormat_RGB32 on EK-RA6M3G.
• Refactored qulrcc to not use RGB332 format for Indexed8 images.
• Switched to std::minstd_rand() instead of std::rand() on EK-RA6M3G.
• Updated the Watch demo to use a new time_t function to get the UTC time.
• Optimized the Font_bindings example for STM32F7508-Discovery.
• Added sanity check to catch common linker issues relating to C++.
• Updated the EK-RA6M3G platform port to use fallbackDrawingEngine for the unsupported pixel formats.
• Updated the baremetal example to use Qul::PlatformInterface::log().
• Updated the platform adaptation for STM32 to support printing/logging.
• Add support for Platform::qul_printf() to MIMXRT1050, MIMXRT1060, and MIMXRT1064.
• Implemented Platform::consoleWrite() for RH850.
• Updated the platform adaptation for EK-RA6M3G, MIMXRT1170, and MIMXRT595, to support PlatformInterface::log().
• Replaced printf with qul_printf in platforms.
• Dropped opacity for the background layer in the layer example.
• Updated vglitesupport to support negative vector coordinates.
• Fixed performance measurement crash on EK-RA6M3G.
• Fixed unspecified CMAKE_BUILD_TYPE when building an application.
• Fixed implicit move not added when startX == startY == 0.
• Fixed clipped text when using spark engine in combination with text cache.
• Adjusted the dynamic assets size threshold to smaller on STM32.
• Added support for generating 1bpp glyphs to fontcompiler.
• Updated build dependancy to import the core library when rebuilding a platform library.
• Enabled Text cache updates on TextAlignment change.
• Pooled the DynDependencyNode allocations.

New Classes and Functions

Aplication development

• New Classes
• New QML Types
• New QML Methods

New Classes

New QML Types

New QML Methods

QML Type Qt:

Platform development

• New Classes
• New Member Functions
• New Global Functions
• New Macros
• New Enum Types

New Classes

New Member Functions

Class Texture:

Class MessageQueueInterface:

Class MessageQueue:

New Global Functions

New Macros

New Enum Types

Changes in Previous Versions