OH_NativeWindow_NativeWindowRequestBuffer

ohos_sys::native_window

Function OH_NativeWindow_NativeWindowRequestBuffer 

Source 
pub unsafe extern "C" fn OH_NativeWindow_NativeWindowRequestBuffer(
    window: *mut NativeWindow,
    buffer: *mut *mut NativeWindowBuffer,
    fenceFd: *mut i32,
) -> i32
Available on crate feature native_window only.
Expand description

Requests a OHNativeWindowBuffer through a OHNativeWindow instance for content production.

Before calling this interface, you need to set the width and height of OHNativeWindow through SET_BUFFER_GEOMETRY.

This interface needs to be used in conjunction with OH_NativeWindow_NativeWindowFlushBuffer, otherwise buffer will be exhausted.

When the fenceFd is used up, you need to close it.

This interface is a non-thread-safe type interface.

Required System Capabilities: SystemCapability.Graphic.Graphic2D.NativeWindow

§Arguments

  • window - Indicates the pointer to a OHNativeWindow instance.

  • buffer - Indicates the double pointer to a OHNativeWindowBuffer instance.

  • fenceFd - Indicates the pointer to a file descriptor handle.

§Returns

  • Returns an error code, 0 is success, otherwise, failed.

Available since API-level: 8

Version: 1.0