| /* |
| * Copyright 2017 Google Inc. |
| * |
| * 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 |
