Just FYI... there's a new STM32F429 EvoPrimer development board available now.
The demo application features what ST call the Chrom-ART Graphics Accelerator a DMA2D implementation for accelerated graphics handling. It facilitates bitmap encoding/decoding, management of multiple objects on the display, layering of objects and blending to include management of transparency.
There's a video of the demo on YouTube:
And the sample apps are available at stm32circle.com (Direct link: http://www.stm32circle.com/resources/stm3242Iprimer.php)