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 #include "include/core/SkColor.h"
9 #include "include/core/SkStream.h"
10 #include "include/core/SkSurface.h"
11 #include "src/core/SkRemoteGlyphCache.h"
12 #include "src/core/SkScalerContext.h"
13 #include "src/core/SkTextBlobTrace.h"
14
15 #include <iostream>
16 #include <string>
17 #include <unordered_map>
18 #include <vector>
19
main(int argc,char ** argv)20 int main(int argc, char** argv) {
21 std::unordered_map<uint64_t, uint32_t> counts;
22 size_t total = 0;
23
24 for (int i = 1; i < argc; i++) {
25 const char* filename = argv[i];
26
27 SkFILEStream in{filename};
28 std::vector<SkTextBlobTrace::Record> trace = SkTextBlobTrace::CreateBlobTrace(&in);
29 for (const SkTextBlobTrace::Record& record : trace) {
30 total++;
31 const SkPaint paint = record.paint;
32 bool fastByPass = paint.getStyle() == SkPaint::kFill_Style
33 && paint.getPathEffect() == nullptr
34 && paint.getMaskFilter() == nullptr;
35 if (fastByPass) {
36 uint64_t blobID = record.origUniqueID;
37 SkPoint offset = record.offset;
38 SkColor c = SkMaskGamma::CanonicalColor(paint.getColor());
39 uint32_t colorBits =
40 (SkColorGetR(c) >> 5u) << 6u
41 | (SkColorGetG(c) >> 5u) << 3u
42 | SkColorGetB(c) >> 5u;
43
44 SkFixed fx = (SkScalarToFixed(offset.x()) >> 13) & 7;
45 SkFixed fy = (SkScalarToFixed(offset.y()) >> 13) & 7;
46 uint32_t posBits = (fx << 3 | fy) << 12;
47
48 uint64_t blobKey = blobID << 32u | posBits | colorBits;
49 auto lookup = counts.find(blobKey);
50 if (lookup == counts.end()) {
51 bool ok;
52 std::tie(lookup, ok) = counts.insert({blobKey, 0});
53 SkASSERT(ok);
54 }
55 lookup->second += 1;
56 std::cout << std::hex << blobKey << "\n";
57 }
58 }
59 std::cerr << "trace: " << filename
60 << " unique: " << counts.size()
61 << " all: " << total
62 << " ratio: " << (float)total/counts.size() << "\n";
63
64 SkRect bounds = {0, 0, 0, 0};
65 for (const SkTextBlobTrace::Record& record : trace) {
66 bounds.join(record.blob->bounds().makeOffset(record.offset.x(), record.offset.y()));
67 }
68 SkIRect iBounds = bounds.roundOut();
69 if (iBounds.size().isEmpty()) {
70 continue;
71 }
72 static constexpr SkColor kBackground = SK_ColorWHITE;
73 sk_sp<SkSurface> surf = SkSurface::MakeRasterN32Premul(iBounds.width() + 16,
74 iBounds.height() + 16);
75 SkCanvas* canvas = surf->getCanvas();
76 canvas->translate(8.0f - iBounds.x(), 8.0f - iBounds.y());
77 canvas->clear(kBackground);
78
79 for (const SkTextBlobTrace::Record& record : trace) {
80 canvas->drawTextBlob(
81 record.blob.get(), record.offset.x(), record.offset.y(), record.paint);
82 }
83
84 sk_sp<SkImage> img(surf->makeImageSnapshot());
85 if (sk_sp<SkData> png = img ? img->encodeToData() : nullptr) {
86 SkString path = SkStringPrintf("text_blob_trace_%04d.png", i);
87 SkFILEWStream(path.c_str()).write(png->data(), png->size());
88 }
89 }
90 return 0;
91 }
92