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32 lines
1.1 KiB
32 lines
1.1 KiB
4 months ago
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// Copyright 2019 Google LLC.
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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#pragma once
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#include "include/core/SkBitmap.h"
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#include "include/core/SkStream.h"
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#include "tools/flags/CommandLineFlags.h"
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// HashAndEncode transforms any SkBitmap into a standard format, currently
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// 16-bit unpremul RGBA in the Rec. 2020 color space. This lets us compare
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// images from different backends or configurations, using feedHash() for
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// direct content-based hashing, or encodePNG() for visual comparison.
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class HashAndEncode {
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public:
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explicit HashAndEncode(const SkBitmap&);
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// Feed uncompressed pixel data into a hash function like MD5.
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void feedHash(SkWStream*) const;
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// Encode pixels as a PNG in our standard format, with md5 and key/properties as metadata.
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bool encodePNG(SkWStream*,
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const char* md5,
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CommandLineFlags::StringArray key,
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CommandLineFlags::StringArray properties) const;
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private:
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const SkISize fSize;
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std::unique_ptr<uint64_t[]> fPixels; // In our standard format mentioned above.
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};
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