image_diff_png.h

Go to the documentation of this file.

// Copyright 2013 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef TESTING_IMAGE_DIFF_IMAGE_DIFF_PNG_H_
#define TESTING_IMAGE_DIFF_IMAGE_DIFF_PNG_H_
 
#include <stdlib.h>  // for size_t.
 
#include <vector>
 
#include "third_party/base/containers/span.h"
 
namespace image_diff_png {
 
// Decode a PNG into an RGBA pixel array, or BGRA pixel array if
// |reverse_byte_order| is set to true.
std::vector<uint8_t> DecodePNG(pdfium::span<const uint8_t> input,
                               bool reverse_byte_order,
                               int* width,
                               int* height);
 
// Encode a BGR pixel array into a PNG.
std::vector<uint8_t> EncodeBGRPNG(pdfium::span<const uint8_t> input,
                                  int width,
                                  int height,
                                  int row_byte_width);
 
// Encode an RGBA pixel array into a PNG.
std::vector<uint8_t> EncodeRGBAPNG(pdfium::span<const uint8_t> input,
                                   int width,
                                   int height,
                                   int row_byte_width);
 
// Encode an BGRA pixel array into a PNG.
std::vector<uint8_t> EncodeBGRAPNG(pdfium::span<const uint8_t> input,
                                   int width,
                                   int height,
                                   int row_byte_width,
                                   bool discard_transparency);
 
// Encode a grayscale pixel array into a PNG.
std::vector<uint8_t> EncodeGrayPNG(pdfium::span<const uint8_t> input,
                                   int width,
                                   int height,
                                   int row_byte_width);
 
}  // namespace image_diff_png
 
#endif  // TESTING_IMAGE_DIFF_IMAGE_DIFF_PNG_H_