sdk/banjo/fuchsia.hardware.amlogiccanvas/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 fuchsia.hardware.amlogiccanvas;

using zx;

type CanvasFlags = strict enum : uint32 {
    READ = 0x1;
    WRITE = 0x2;
};

type CanvasInfo = struct {
    height uint32;
    stride_bytes uint32;
    wrap uint32;
    blkmode uint32;
    endianness uint32;
    flags uint32;
};

@transport("Banjo")
@banjo_layout("ddk-protocol")
protocol AmlogicCanvas {
    /// Configures a canvas.
    /// Adds a framebuffer to the canvas lookup table.
    Config(resource struct {
        vmo zx.handle:VMO;
        offset uint64;
        info CanvasInfo;
    }) -> (struct {
        s zx.status;
        canvas_idx uint8;
    });
    /// Frees up a canvas.
    Free(struct {
        canvas_idx uint8;
    }) -> (struct {
        s zx.status;
    });
};