92 lines
3.5 KiB
C++
92 lines
3.5 KiB
C++
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/*
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* Copyright 2019 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "include/core/SkColor.h"
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#include "include/core/SkStream.h"
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#include "include/core/SkSurface.h"
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#include "src/core/SkRemoteGlyphCache.h"
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#include "src/core/SkScalerContext.h"
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#include "src/core/SkTextBlobTrace.h"
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#include <iostream>
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#include <string>
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#include <unordered_map>
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#include <vector>
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int main(int argc, char** argv) {
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std::unordered_map<uint64_t, uint32_t> counts;
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size_t total = 0;
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for (int i = 1; i < argc; i++) {
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const char* filename = argv[i];
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SkFILEStream in{filename};
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std::vector<SkTextBlobTrace::Record> trace = SkTextBlobTrace::CreateBlobTrace(&in);
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for (const SkTextBlobTrace::Record& record : trace) {
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total++;
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const SkPaint paint = record.paint;
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bool fastByPass = paint.getStyle() == SkPaint::kFill_Style
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&& paint.getPathEffect() == nullptr
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&& paint.getMaskFilter() == nullptr;
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if (fastByPass) {
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uint64_t blobID = record.origUniqueID;
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SkPoint offset = record.offset;
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SkColor c = SkMaskGamma::CanonicalColor(paint.getColor());
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uint32_t colorBits =
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(SkColorGetR(c) >> 5u) << 6u
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| (SkColorGetG(c) >> 5u) << 3u
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| SkColorGetB(c) >> 5u;
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SkFixed fx = (SkScalarToFixed(offset.x()) >> 13) & 7;
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SkFixed fy = (SkScalarToFixed(offset.y()) >> 13) & 7;
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uint32_t posBits = (fx << 3 | fy) << 12;
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uint64_t blobKey = blobID << 32u | posBits | colorBits;
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auto lookup = counts.find(blobKey);
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if (lookup == counts.end()) {
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bool ok;
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std::tie(lookup, ok) = counts.insert({blobKey, 0});
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SkASSERT(ok);
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}
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lookup->second += 1;
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std::cout << std::hex << blobKey << "\n";
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}
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}
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std::cerr << "trace: " << filename
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<< " unique: " << counts.size()
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<< " all: " << total
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<< " ratio: " << (float)total/counts.size() << "\n";
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SkRect bounds = {0, 0, 0, 0};
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for (const SkTextBlobTrace::Record& record : trace) {
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bounds.join(record.blob->bounds().makeOffset(record.offset.x(), record.offset.y()));
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}
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SkIRect iBounds = bounds.roundOut();
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if (iBounds.size().isEmpty()) {
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continue;
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}
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static constexpr SkColor kBackground = SK_ColorWHITE;
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sk_sp<SkSurface> surf = SkSurface::MakeRasterN32Premul(iBounds.width() + 16,
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iBounds.height() + 16);
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SkCanvas* canvas = surf->getCanvas();
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canvas->translate(8.0f - iBounds.x(), 8.0f - iBounds.y());
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canvas->clear(kBackground);
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for (const SkTextBlobTrace::Record& record : trace) {
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canvas->drawTextBlob(
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record.blob.get(), record.offset.x(), record.offset.y(), record.paint);
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}
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sk_sp<SkImage> img(surf->makeImageSnapshot());
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if (sk_sp<SkData> png = img ? img->encodeToData() : nullptr) {
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SkString path = SkStringPrintf("text_blob_trace_%04d.png", i);
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SkFILEWStream(path.c_str()).write(png->data(), png->size());
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}
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}
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return 0;
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}
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