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// 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.
#include <fuchsia/images/cpp/fidl.h>
#include <stdint.h>
namespace images {
// Returns the number of bits per pixel for the given format. This is the bits
// per pixel in the overall image across all bytes that contain pixel data. For
// example, NV12 is 12 bits per pixel.
size_t BitsPerPixel(const fuchsia::images::PixelFormat& pixel_format);
// This is the number of stride bytes per pixel of width. For formats such as
// NV12 that separate Y and UV data, this is the number of stride bytes of the Y
// plane. NV12 has the same stride for the UV data. formats with a different
// stride for UV data vs Y data are not handled yet.
size_t StrideBytesPerWidthPixel(const fuchsia::images::PixelFormat& pixel_format);
// Returns the pixel alignment for the given format.
// This is technically something closer to "max sample alignment" for the given
// format. For example, NV12 returns 2 here because its UV interleaved data has
// 2 bytes per sample, despite its Y plane having 1 byte per sample.
// The stride is required to be divisible by this alignment.
size_t MaxSampleAlignment(const fuchsia::images::PixelFormat& pixel_format);
// This would be height * stride, if it weren't for formats like NV12, where it
// isn't. The output is bytes.
size_t ImageSize(const fuchsia::images::ImageInfo& image_info);
} // namespace images