1/*
2 * Copyright 2012 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef skdiff_utils_DEFINED
9#define skdiff_utils_DEFINED
10
11#include "skdiff.h"
12#include "SkImageDecoder.h"
13
14class SkBitmap;
15class SkData;
16class SkString;
17
18/** Returns true if the two buffers passed in are both non-NULL,
19 *  have the same length, and contain exactly the same byte values.
20 */
21bool are_buffers_equal(SkData* skdata1, SkData* skdata2);
22
23/** Reads the file at the given path and returns its complete contents as an
24 *  SkData object (or returns NULL on error).
25 */
26SkData* read_file(const char* file_path);
27
28/** Decodes the fileBits into the resource.fBitmap. Returns false on failure. */
29bool get_bitmap(SkData* fileBits, DiffResource& resource, SkImageDecoder::Mode mode);
30
31/** Writes the bitmap as a PNG to the path specified. */
32bool write_bitmap(const SkString& path, const SkBitmap& bitmap);
33
34/** Given an image filename, returns the name of the file containing
35 *  the associated difference image.
36 */
37SkString filename_to_diff_filename(const SkString& filename);
38
39/** Given an image filename, returns the name of the file containing
40 *  the "white" difference image.
41 */
42SkString filename_to_white_filename(const SkString& filename);
43
44/** Calls compute_diff and handles the difference and white diff resources.
45 *  If !outputDir.isEmpty(), writes out difference and white images.
46 */
47void create_and_write_diff_image(DiffRecord* drp,
48                                 DiffMetricProc dmp,
49                                 const int colorThreshold,
50                                 const SkString& outputDir,
51                                 const SkString& filename);
52
53#endif
54