lcdifv2_alpha
Overview
This example demonstrates how to use the LCDIF v2 layer blend feature. In this example, two layers are enabled. For each layer, a global alpha value 50% (128) is used. When the example runs, two rectangles are shown, one blue and one red, in the overlay region, the color is purple.
+——————————————-+ | | | | RED | | | +———+———+ | | | PURPLE | | | | | | | | |———-+———+ | | | | | | | | BLUE | | | +——————-+ | | | | | +——————————————-+
Note: The global alpha value shall only apply to the area that 2 layers overlaps, however due to IP limitation, the blend happens on non-ovelapped area too. So if the global alpha value of the upper layer is set to 0xFF, the whole red area disappears. The IP cannot support such use case.