| /* | |
| * Copyright 2017 Google LLC | |
| * | |
| * Use of this source code is governed by a BSD-style license that can be | |
| * found in the LICENSE file. | |
| */ | |
| #ifndef SkPngPriv_DEFINED | |
| #define SkPngPriv_DEFINED | |
| #include "include/core/SkTypes.h" | |
| // We store kAlpha_8 images as GrayAlpha in png. Our private signal is significant bits for gray. | |
| // If that is set to 1, we assume the gray channel can be ignored, and we output just alpha. | |
| // We tried 0 at first, but png doesn't like a 0 sigbit for a channel it expects, hence we chose 1. | |
| static constexpr int kGraySigBit_GrayAlphaIsJustAlpha = 1; | |
| #endif |