system/fidl/ddk/protocols/amlogic-canvas.fidl

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

library ddk.protocol.amlogic_canvas;

using zx;

struct CanvasInfo {
    uint32 height;
    uint32 stride_bytes;
    uint32 wrap;
    uint32 blkmode;
    uint32 endianness;
};

[Layout="ddk-protocol", DefaultProtocol]
interface Canvas {
    /// Configures a canvas.
    /// Adds a framebuffer to the canvas lookup table.
    1: Config(handle<vmo> vmo, usize offset, CanvasInfo info) -> (zx.status s, uint8 canvas_idx);
    /// Frees up a canvas.
    2: Free(uint8 canvas_idx) -> (zx.status s);
};