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/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_DESKTOP_CAPTURE_RGBA_COLOR_H_
#define MODULES_DESKTOP_CAPTURE_RGBA_COLOR_H_
#include <stdint.h>
#include "modules/desktop_capture/desktop_frame.h"
namespace webrtc {
// A four-byte structure to store a color in BGRA format. This structure also
// provides functions to be created from uint8_t array, say,
// DesktopFrame::data(). It always uses BGRA order for internal storage to match
// DesktopFrame::data().
struct RgbaColor final {
// Creates a color with BGRA channels.
RgbaColor(uint8_t blue, uint8_t green, uint8_t red, uint8_t alpha);
// Creates a color with BGR channels, and set alpha channel to 255 (opaque).
RgbaColor(uint8_t blue, uint8_t green, uint8_t red);
// Creates a color from four-byte in BGRA order, i.e. DesktopFrame::data().
explicit RgbaColor(const uint8_t* bgra);
// Creates a color from BGRA channels in a uint format. Consumers should make
// sure the memory order of the uint32_t is always BGRA from left to right, no
// matter the system endian. This function creates an equivalent RgbaColor
// instance from the ToUInt32() result of another RgbaColor instance.
explicit RgbaColor(uint32_t bgra);
// Returns true if `this` and `right` is the same color.
bool operator==(const RgbaColor& right) const;
// Returns true if `this` and `right` are different colors.
bool operator!=(const RgbaColor& right) const;
uint32_t ToUInt32() const;
uint8_t blue;
uint8_t green;
uint8_t red;
uint8_t alpha;
};
static_assert(
DesktopFrame::kBytesPerPixel == sizeof(RgbaColor),
"A pixel in DesktopFrame should be safe to be represented by a RgbaColor");
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_RGBA_COLOR_H_
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