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// Copyright 2019 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 <lib/fzl/vmo-pool.h>
namespace camera {
inline constexpr uint16_t kHighByteMask = 0xFF0;
inline constexpr uint16_t kLowHalfByteMask = 0x00F;
inline constexpr uint8_t kDoubleByteShift = 16;
inline constexpr uint8_t kByteShift = 8;
inline constexpr uint8_t kHalfByteShift = 4;
class ImageWriter {
ImageWriter(uint32_t width, uint32_t height, size_t vmo_size)
: width_(width), height_(height), vmo_size_(vmo_size) {}
virtual ~ImageWriter() = default;
// Virtual method to be implemented by derived classes specific to each supported image format.
// Creates a vmo of appropriate size (depending on DmaFormat image size) and fills it according to
// the format corresponding to the derived class.
// Args:
// |vmo| Memory object handle to which the image will be written. This function will create a new
// vmo.
// |r| Maximum red pixel value.
// |g| Maximum green pixel value.
// |b| Maximum blue pixel value.
// Returns:
// Whether vmo creation succeeded.
virtual zx_status_t Write(zx::vmo* vmo, uint16_t r, uint16_t g, uint16_t b) = 0;
// Getter methods
uint32_t width() const { return width_; }
uint32_t height() const { return height_; }
size_t vmo_size() const { return vmo_size_; }
const uint32_t width_, height_;
const size_t vmo_size_;
} // namespace camera