bridge

Documentation

Overview

Package bridge provides typed Go wrappers around the gralloc_bridge.so C functions. It is the only package that imports purego or handles raw FFI concerns.

Analogous to kernelbinder/ioctl.go which wraps raw ioctls behind typed Go functions.

Index

• func Free(h BufferHandle)
• func LockGeneric(h BufferHandle, width, height int32, bufSize int) ([]byte, error)
• func LockYCbCr(h BufferHandle, width, height int32) ([]byte, error)
• func Open() error
• type BufferHandle
  • func ImportBuffer(fds []int32, ints []int32) (BufferHandle, error)

Functions

func Free

func Free(h BufferHandle)

Free releases an imported buffer handle.

func LockGeneric

func LockGeneric(h BufferHandle, width, height int32, bufSize int) ([]byte, error)

LockGeneric locks a buffer for CPU read and copies the pixel data into a Go byte slice. The buffer is unlocked before returning.

func LockYCbCr

func LockYCbCr(h BufferHandle, width, height int32) ([]byte, error)

LockYCbCr locks a YCbCr buffer for CPU read and copies all three planes (Y, Cb, Cr) into a Go byte slice. The buffer is unlocked before returning.

func Open

func Open() error

Open loads the gralloc_bridge.so and initializes the HIDL IMapper. Safe to call multiple times; the .so is loaded only once.

Types

type BufferHandle

type BufferHandle uintptr

BufferHandle is an opaque reference to an imported gralloc buffer.

func ImportBuffer

func ImportBuffer(fds []int32, ints []int32) (BufferHandle, error)

ImportBuffer imports a raw gralloc buffer handle. The returned BufferHandle must be released with Free when no longer needed.