1// Copyright 2019 The Amber Authors.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#ifndef SAMPLES_PNG_H_
16#define SAMPLES_PNG_H_
17
18#include <string>
19#include <utility>
20#include <vector>
21
22#include "amber/amber.h"
23
24namespace png {
25
26/// Converts the image of dimensions |width| and |height| and with pixels stored
27/// in row-major order in |values| with format B8G8R8A8 into PNG format,
28/// returning the PNG binary as a string.
29amber::Result ConvertToPNG(uint32_t width,
30                           uint32_t height,
31                           const std::vector<amber::Value>& values,
32                           std::vector<uint8_t>* buffer);
33
34/// Loads a PNG image from |file_name|. Image dimensions of the loaded file are
35/// stored into |width| and |height|, and the image data is stored in a one
36/// byte per data element format into |values|.
37amber::Result LoadPNG(const std::string file_name,
38                      uint32_t* width,
39                      uint32_t* height,
40                      std::vector<amber::Value>* values);
41
42}  // namespace png
43
44#endif  // SAMPLES_PNG_H_
45