SkShaperJSONWriter.cpp File Reference

#include "modules/skparagraph/tests/SkShaperJSONWriter.h"
#include "include/core/SkFont.h"
#include "include/core/SkSpan.h"
#include "include/core/SkString.h"
#include "include/core/SkTypeface.h"
#include "include/private/base/SkTo.h"
#include "src/base/SkUTF.h"
#include "src/utils/SkJSONWriter.h"
#include <algorithm>
#include <cstddef>
#include <limits>
#include <string>
#include <type_traits>

Go to the source code of this file.

Functions
static bool	is_one_to_one (const char utf8[], size_t utf8Begin, size_t utf8End, std::vector< uint32_t > &clusters)

Function Documentation

is_one_to_one()

static bool is_one_to_one ( const char  utf8[], size_t  utf8Begin, size_t  utf8End, std::vector< uint32_t > &  clusters  )

static

Definition at line 42 of file SkShaperJSONWriter.cpp.

                                       {
    size_t lastUtf8Index = utf8End;
 
    auto checkCluster = [&](size_t clusterIndex) {
        if (clusters[clusterIndex] >= lastUtf8Index) {
            return false;
        }
        size_t utf8ClusterSize = lastUtf8Index - clusters[clusterIndex];
        if (SkUTF::CountUTF8(&utf8[clusters[clusterIndex]], utf8ClusterSize) != 1) {
            return false;
        }
        lastUtf8Index = clusters[clusterIndex];
        return true;
    };
 
    if (clusters.front() <= clusters.back()) {
        // left-to-right clusters
        size_t clusterCursor = clusters.size();
        while (clusterCursor > 0) {
            if (!checkCluster(--clusterCursor)) { return false; }
        }
    } else {
        // right-to-left clusters
        size_t clusterCursor = 0;
        while (clusterCursor < clusters.size()) {
            if (!checkCluster(clusterCursor++)) { return false; }
        }
    }
 
    return true;
}