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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.
*/
#include "modules/desktop_capture/rgba_color.h"
#include "rtc_base/system/arch.h"
namespace webrtc {
namespace {
bool AlphaEquals(uint8_t i, uint8_t j) {
// On Linux and Windows 8 or early version, '0' was returned for alpha channel
// from capturer APIs, on Windows 10, '255' was returned. So a workaround is
// to treat 0 as 255.
return i == j || ((i == 0 || i == 255) && (j == 0 || j == 255));
}
} // namespace
RgbaColor::RgbaColor(uint8_t blue, uint8_t green, uint8_t red, uint8_t alpha) {
this->blue = blue;
this->green = green;
this->red = red;
this->alpha = alpha;
}
RgbaColor::RgbaColor(uint8_t blue, uint8_t green, uint8_t red)
: RgbaColor(blue, green, red, 0xff) {}
RgbaColor::RgbaColor(const uint8_t* bgra)
: RgbaColor(bgra[0], bgra[1], bgra[2], bgra[3]) {}
RgbaColor::RgbaColor(uint32_t bgra)
: RgbaColor(reinterpret_cast<uint8_t*>(&bgra)) {}
bool RgbaColor::operator==(const RgbaColor& right) const {
return blue == right.blue && green == right.green && red == right.red &&
AlphaEquals(alpha, right.alpha);
}
bool RgbaColor::operator!=(const RgbaColor& right) const {
return !(*this == right);
}
uint32_t RgbaColor::ToUInt32() const {
#if defined(WEBRTC_ARCH_LITTLE_ENDIAN)
return blue | (green << 8) | (red << 16) | (alpha << 24);
#else
return (blue << 24) | (green << 16) | (red << 8) | alpha;
#endif
}
} // namespace webrtc
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