WFD_QNX_port_writeback

Description

This extension defines attributes and functions needed to configure writeback support on a port. It's dependent on WFD_QNX_destination.

Attributes

WFD_PORT_WRITEBACK_SUPPORT_QNX 0x7640

Specify if the port supports writeback.

Storage type: WFDboolean read-only

Range: true or false

Accessors:

• wfdGetPortAttribi()

WFD_PORT_WRITEBACK_SCALE_RANGE_QNX 0x7641

Specify the minimum and maximum scaling factors supported for writeback, using the same calculations as WFD_PIPELINE_SCALE_RANGE.

Storage type: WFDfloat[2] read-only

Range: WFDfloat

Accessors:

• wfdGetPortAttribfv()

WFD_PORT_WRITEBACK_SOURCE_RECTANGLE_QNX 0x7642

Specify the portion of the port output image to be captured during writeback. The image is captured after the final stage of the OpenWFD 1.0 display control pipeline (i.e. #7, layer and blend). The width and height of the active port mode define the maximum source image size.

Storage type: WFDint[4] as (offsetX,offsetY,width,height); read/write

Range: WFDint

Default: (0,0,0,0) an invalid setting

Accessors:

• wfdGetPortAttribiv()
• wfdSetPortAttribiv()

WFD_PORT_WRITEBACK_SOURCE_RECTANGLE_QNX 0x7643

Specify the sub-rectangle of each destination buffer where the data captured during writeback will be written.

Storage type: WFDint[4] as (offsetX,offsetY,width,height); read/write

Range: WFDint

Default: (0,0,0,0) an invalid setting

Accessors:

• wfdGetPortAttribiv()
• wfdSetPortAttribiv()