| // 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 "garnet/lib/ui/yuv/yuv.h" |
| |
| namespace { |
| |
| uint8_t clip(int in) { |
| uint32_t out = in < 0 ? 0 : (uint32_t)in; |
| return out > 255 ? 255 : (out & 0xff); |
| } |
| |
| } // namespace |
| |
| namespace yuv { |
| |
| // Letting compiler decide whether to inline, for now. |
| void YuvToBgra(uint8_t y_raw, uint8_t u_raw, uint8_t v_raw, uint8_t* bgra) { |
| int32_t y = 298 * (static_cast<int32_t>(y_raw) - 16); |
| int32_t u = static_cast<int32_t>(u_raw) - 128; |
| int32_t v = static_cast<int32_t>(v_raw) - 128; |
| bgra[0] = clip(((y + 516 * u + 128) / 256)); // blue |
| bgra[1] = clip(((y - 208 * v - 100 * u + 128) / 256)); // green |
| bgra[2] = clip(((y + 409 * v + 128) / 256)); // red |
| bgra[3] = 0xff; // alpha |
| } |
| |
| } // namespace yuv |
