1/*
2 * Copyright 2019 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 SkShaperJSONWriter_DEFINED
9#define SkShaperJSONWriter_DEFINED
10
11#include <cstddef>
12#include <cstdint>
13#include <functional>
14#include <string>
15#include <vector>
16
17#include "modules/skshaper/include/SkShaper.h"
18#include "src/core/SkSpan.h"
19
20class SkJSONWriter;
21
22class SkShaperJSONWriter final : public SkShaper::RunHandler {
23public:
24 SkShaperJSONWriter(SkJSONWriter* JSONWriter, const char* utf8, size_t size);
25
26 void beginLine() override;
27 void runInfo(const RunInfo& info) override;
28 void commitRunInfo() override;
29
30 Buffer runBuffer(const RunInfo& info) override;
31
32 void commitRunBuffer(const RunInfo& info) override;
33
34 void commitLine() override {}
35
36 using BreakupCluastersCallback =
37 std::function<void(size_t, size_t, uint32_t, uint32_t)>;
38
39 // Break up cluster into a set of ranges for the UTF8, and the glyphIDs.
40 static void BreakupClusters(size_t utf8Begin, size_t utf8End,
41 SkSpan<const uint32_t> clusters,
42 const BreakupCluastersCallback& processMToN);
43
44
45 using VisualizeClustersCallback =
46 std::function<void(size_t, SkSpan<const char>, SkSpan<const SkGlyphID>)>;
47
48 // Gather runs of 1:1 into larger runs, and display M:N as single entries.
49 static void VisualizeClusters(const char utf8[],
50 size_t utf8Begin, size_t utf8End,
51 SkSpan<const SkGlyphID> glyphIDs,
52 SkSpan<const uint32_t> clusters,
53 const VisualizeClustersCallback& processMToN);
54
55private:
56 void displayMToN(size_t codePointCount,
57 SkSpan<const char> utf8,
58 SkSpan<const SkGlyphID> glyphIDs);
59
60 SkJSONWriter* fJSONWriter;
61 std::vector<SkGlyphID> fGlyphs;
62 std::vector<SkPoint> fPositions;
63 std::vector<uint32_t> fClusters;
64
65 std::string fUTF8;
66};
67
68#endif // SkShaperJSONWriter_DEFINED
69