| /* |
| * Copyright 2020 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkSamplingPriv_DEFINED |
| #define SkSamplingPriv_DEFINED |
| |
| #include "include/core/SkSamplingOptions.h" |
| |
| class SkReadBuffer; |
| class SkWriteBuffer; |
| |
| class SkSamplingPriv { |
| public: |
| enum { |
| kFlatSize = 3 * sizeof(uint32_t) // bool32 + [2 floats | 2 ints] |
| }; |
| |
| // Returns true if the sampling can be ignored when the CTM is identity. |
| static bool NoChangeWithIdentityMatrix(const SkSamplingOptions& sampling) { |
| // If B == 0, the cubic resampler should have no effect for identity matrices |
| // https://entropymine.com/imageworsener/bicubic/ |
| return !sampling.useCubic || sampling.cubic.B == 0; |
| } |
| |
| static SkSamplingOptions Read(SkReadBuffer&); |
| static void Write(SkWriteBuffer&, const SkSamplingOptions&); |
| }; |
| |
| #endif |