本文整理汇总了C++中std::u32string::begin方法的典型用法代码示例。如果您正苦于以下问题：C++ u32string::begin方法的具体用法？C++ u32string::begin怎么用？C++ u32string::begin使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类std::u32string的用法示例。
在下文中一共展示了u32string::begin方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: doFillGlyphCache
void FreeTypeFont::doFillGlyphCache(GlyphCache& cache, const std::u32string& characters) {
/** @bug Crash when atlas is too small */
/* Get glyph codes from characters */
std::vector<FT_UInt> charIndices;
charIndices.resize(characters.size()+1);
charIndices[0] = 0;
std::transform(characters.begin(), characters.end(), charIndices.begin()+1,
[this](const char32_t c) { return FT_Get_Char_Index(ftFont, c); });
/* Remove duplicates (e.g. uppercase and lowercase mapped to same glyph) */
std::sort(charIndices.begin(), charIndices.end());
charIndices.erase(std::unique(charIndices.begin(), charIndices.end()), charIndices.end());
/* Sizes of all characters */
std::vector<Vector2i> charSizes;
charSizes.reserve(charIndices.size());
for(FT_UInt c: charIndices) {
CORRADE_INTERNAL_ASSERT_OUTPUT(FT_Load_Glyph(ftFont, c, FT_LOAD_DEFAULT) == 0);
charSizes.push_back(Vector2i(ftFont->glyph->metrics.width, ftFont->glyph->metrics.height)/64);
}
/* Create texture atlas */
const std::vector<Range2Di> charPositions = cache.reserve(charSizes);
/* Render all characters to the atlas and create character map */
Containers::Array<char> pixmap{Containers::ValueInit, std::size_t(cache.textureSize().product())};
for(std::size_t i = 0; i != charPositions.size(); ++i) {
/* Load and render glyph */
/** @todo B&W only if radius != 0 */
FT_GlyphSlot glyph = ftFont->glyph;
CORRADE_INTERNAL_ASSERT_OUTPUT(FT_Load_Glyph(ftFont, charIndices[i], FT_LOAD_DEFAULT) == 0);
CORRADE_INTERNAL_ASSERT_OUTPUT(FT_Render_Glyph(glyph, FT_RENDER_MODE_NORMAL) == 0);
/* Copy rendered bitmap to texture image */
const FT_Bitmap& bitmap = glyph->bitmap;
CORRADE_INTERNAL_ASSERT(std::abs(Int(bitmap.width)-charPositions[i].sizeX()) <= 2);
CORRADE_INTERNAL_ASSERT(std::abs(Int(bitmap.rows)-charPositions[i].sizeY()) <= 2);
for(Int yin = 0, yout = charPositions[i].bottom(), ymax = bitmap.rows; yin != ymax; ++yin, ++yout)
for(Int xin = 0, xout = charPositions[i].left(), xmax = bitmap.width; xin != xmax; ++xin, ++xout)
pixmap[yout*cache.textureSize().x() + xout] = bitmap.buffer[(bitmap.rows-yin-1)*bitmap.width + xin];
/* Insert glyph parameters into cache */
cache.insert(charIndices[i],
Vector2i(glyph->bitmap_left, glyph->bitmap_top-charPositions[i].sizeY()),
charPositions[i]);
}
/* Set cache image */
#ifndef MAGNUM_TARGET_GLES2
Image2D image(PixelFormat::Red, PixelType::UnsignedByte, cache.textureSize(), std::move(pixmap));
#else
Image2D image(Context::current() && Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_rg>() ?
PixelFormat::Red : PixelFormat::Luminance, PixelType::UnsignedByte, cache.textureSize(), std::move(pixmap));
#endif
cache.setImage({}, image);
}示例2:
inline void
designer< T, C, N >::drawText( T x, T y, const std::u32string &text ) {
// Set the pen position
setPenPosition( x, y );
// Draw the unicode string
drawText( text.begin(), text.end() );
}示例3: move
// Convert UTF-32 string to UTF-8 string
std::string luna2d::utf::FromUtf32(const std::u32string& string)
{
std::string ret;
utf32to8(string.begin(), string.end(), std::back_inserter(ret));
return std::move(ret);
}示例4:
bool Curses::Key::operator==(const std::u32string &v) const
{
return keycode == 0 &&
std::find(v.begin(), v.end(), ukey) != v.end();
}示例5: string
//==============================================================================
std::string to_utf8(const std::u32string& input) {
return std::string(
boost::u32_to_u8_iterator<std::u32string::const_iterator>(input.begin()),
boost::u32_to_u8_iterator<std::u32string::const_iterator>(input.end()));
}示例6: wmain
int wmain(int argc, wchar_t *argv[])
{
try
{
if (argc < 2)
{
std::cout << "No url" << std::endl;
return 1;
}
//Получение страницы посредством get-запроса
const Web::Url l_url(Encoding::utf16to8(reinterpret_cast<char16_t *>(argv[1])));
const std::string l_content(get(l_url));
//Извлечение статьи
std::string l_text;
if (!recognize(l_content, l_text))
{
std::cout << "Couldn't recognize" << std::endl;
return 1;
}
//Формирование путей
const std::u32string l_utf32path(Encoding::utf8to32(l_url.path()));
std::string l_fixedPath;
for (auto j(l_utf32path.begin()); j != l_utf32path.end();)
{
const auto i(*j == '/' ? l_fixedPath += '/', j + 1 : j);
j = std::find(i, l_utf32path.end(), '/');
const size_t l_size = std::min(30, std::distance(i, j));
const std::u32string l_part(i, i + l_size);
l_fixedPath += Encoding::utf32to8(l_part);
}
const std::u32string l_u32fn(Encoding::utf8to32(l_url.file()));
const std::u32string l_base(l_u32fn.substr(0, l_u32fn.find('.')).substr(0, 30));
const std::string l_fixedName(l_base.empty() ? std::string("a.txt") : Encoding::utf32to8(l_base) + ".txt");
//http://boost.2283326.n4.nabble.com/boost-filesystem-path-as-utf-8-tp4320098p4322460.html
boost::filesystem::detail::utf8_codecvt_facet l_utf8;
const boost::filesystem::path l_dirPath(l_url.host() + l_fixedPath, l_utf8);
const boost::filesystem::path l_filePath(l_url.host() + l_fixedPath + '/' + l_fixedName, l_utf8);
//Создание каталогов и сохранения статьи в текстовый файл
boost::filesystem::create_directories(l_dirPath);
boost::filesystem::ofstream l_of(l_filePath, std::ios::binary | std::ios::out);
if (!l_of.is_open())
{
std::cout << "Output file open error" << std::endl;
return -1;
}
l_of.write("\xef\xbb\xbf", 3); //BOM
l_of.write(l_text.data(), l_text.size());
l_of.close();
if (argc > 2)
{
const boost::filesystem::path l_xfp(l_url.host() + l_fixedPath + "/1.html", l_utf8);
boost::filesystem::ofstream l_xof(l_xfp, std::ios::binary | std::ios::out);
if (l_xof.is_open())
{
l_xof.write("\xef\xbb\xbf", 3);
l_xof.write(l_content.data(), l_content.size());
l_xof.close();
}
}
return 0;
}
catch (const std::bad_alloc &)
{
::printf("Mem alloc error");
}
catch (const std::exception &a)
{
std::cout << "Error" << std::endl << a.what() << std::endl;
}
return -1;
}